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 {
1451         ir_node *old = get_cur_block();
1452
1453         set_cur_block(block);
1454         keep_alive(get_store());
1455         /* TODO: keep all memory edges from restricted pointers */
1456         set_cur_block(old);
1457 }
1458
1459 static ir_node *reference_expression_enum_value_to_firm(
1460                 const reference_expression_t *ref)
1461 {
1462         entity_t *entity = ref->entity;
1463         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1464         /* make sure the type is constructed */
1465         (void) get_ir_type(type);
1466
1467         return new_Const(entity->enum_value.tv);
1468 }
1469
1470 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1471 {
1472         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1473         entity_t *entity = ref->entity;
1474         assert(is_declaration(entity));
1475         type_t   *type   = skip_typeref(entity->declaration.type);
1476
1477         /* make sure the type is constructed */
1478         (void) get_ir_type(type);
1479
1480         switch ((declaration_kind_t) entity->declaration.kind) {
1481         case DECLARATION_KIND_UNKNOWN:
1482                 break;
1483
1484         case DECLARATION_KIND_LOCAL_VARIABLE: {
1485                 ir_mode *const mode  = get_ir_mode_storage(type);
1486                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1487                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1488         }
1489         case DECLARATION_KIND_PARAMETER: {
1490                 ir_mode *const mode  = get_ir_mode_storage(type);
1491                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1492                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1493         }
1494         case DECLARATION_KIND_FUNCTION: {
1495                 ir_mode *const mode = get_ir_mode_storage(type);
1496                 return create_symconst(dbgi, mode, entity->function.entity);
1497         }
1498         case DECLARATION_KIND_INNER_FUNCTION: {
1499                 ir_mode *const mode = get_ir_mode_storage(type);
1500                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1501                         /* inner function not using the closure */
1502                         return create_symconst(dbgi, mode, entity->function.entity);
1503                 } else {
1504                         /* TODO: need trampoline here */
1505                         panic("Trampoline code not implemented");
1506                         return create_symconst(dbgi, mode, entity->function.entity);
1507                 }
1508         }
1509         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1510                 ir_node *const addr = get_global_var_address(dbgi, entity);
1511                 return deref_address(dbgi, entity->declaration.type, addr);
1512         }
1513
1514         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1515                 ir_entity *irentity = entity->variable.v.entity;
1516                 ir_node   *frame    = get_local_frame(irentity);
1517                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518                 return deref_address(dbgi, entity->declaration.type, sel);
1519         }
1520         case DECLARATION_KIND_PARAMETER_ENTITY: {
1521                 ir_entity *irentity = entity->parameter.v.entity;
1522                 ir_node   *frame    = get_local_frame(irentity);
1523                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524                 return deref_address(dbgi, entity->declaration.type, sel);
1525         }
1526
1527         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1528                 return entity->variable.v.vla_base;
1529
1530         case DECLARATION_KIND_COMPOUND_MEMBER:
1531                 panic("not implemented reference type");
1532         }
1533
1534         panic("reference to declaration with unknown type found");
1535 }
1536
1537 static ir_node *reference_addr(const reference_expression_t *ref)
1538 {
1539         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1540         entity_t *entity = ref->entity;
1541         assert(is_declaration(entity));
1542
1543         switch((declaration_kind_t) entity->declaration.kind) {
1544         case DECLARATION_KIND_UNKNOWN:
1545                 break;
1546         case DECLARATION_KIND_PARAMETER:
1547         case DECLARATION_KIND_LOCAL_VARIABLE:
1548                 /* you can store to a local variable (so we don't panic but return NULL
1549                  * as an indicator for no real address) */
1550                 return NULL;
1551         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1552                 ir_node *const addr = get_global_var_address(dbgi, entity);
1553                 return addr;
1554         }
1555         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1556                 ir_entity *irentity = entity->variable.v.entity;
1557                 ir_node   *frame    = get_local_frame(irentity);
1558                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1559
1560                 return sel;
1561         }
1562         case DECLARATION_KIND_PARAMETER_ENTITY: {
1563                 ir_entity *irentity = entity->parameter.v.entity;
1564                 ir_node   *frame    = get_local_frame(irentity);
1565                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1566
1567                 return sel;
1568         }
1569
1570         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1571                 return entity->variable.v.vla_base;
1572
1573         case DECLARATION_KIND_FUNCTION: {
1574                 type_t  *const type = skip_typeref(entity->declaration.type);
1575                 ir_mode *const mode = get_ir_mode_storage(type);
1576                 return create_symconst(dbgi, mode, entity->function.entity);
1577         }
1578
1579         case DECLARATION_KIND_INNER_FUNCTION:
1580         case DECLARATION_KIND_COMPOUND_MEMBER:
1581                 panic("not implemented reference type");
1582         }
1583
1584         panic("reference to declaration with unknown type found");
1585 }
1586
1587 /**
1588  * Transform calls to builtin functions.
1589  */
1590 static ir_node *process_builtin_call(const call_expression_t *call)
1591 {
1592         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1593
1594         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1595         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1596
1597         type_t *type = skip_typeref(builtin->base.type);
1598         assert(is_type_pointer(type));
1599
1600         type_t   *function_type = skip_typeref(type->pointer.points_to);
1601         symbol_t *symbol        = builtin->symbol;
1602
1603         switch(symbol->ID) {
1604         case T___builtin_alloca: {
1605                 if (call->arguments == NULL || call->arguments->next != NULL) {
1606                         panic("invalid number of parameters on __builtin_alloca");
1607                 }
1608                 expression_t *argument = call->arguments->expression;
1609                 ir_node      *size     = expression_to_firm(argument);
1610
1611                 ir_node *store  = get_store();
1612                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1613                                               stack_alloc);
1614                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1615                 set_store(proj_m);
1616                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1617
1618                 return res;
1619         }
1620
1621         case T___builtin_huge_val:
1622         case T___builtin_inf:
1623         case T___builtin_inff:
1624         case T___builtin_infl: {
1625                 type_t  *type = function_type->function.return_type;
1626                 ir_mode *mode = get_ir_mode_arithmetic(type);
1627                 tarval  *tv   = get_mode_infinite(mode);
1628                 ir_node *res  = new_d_Const(dbgi, tv);
1629                 return   res;
1630         }
1631         case T___builtin_nan:
1632         case T___builtin_nanf:
1633         case T___builtin_nanl: {
1634                 /* Ignore string for now... */
1635                 assert(is_type_function(function_type));
1636                 type_t  *type = function_type->function.return_type;
1637                 ir_mode *mode = get_ir_mode_arithmetic(type);
1638                 tarval  *tv   = get_mode_NAN(mode);
1639                 ir_node *res  = new_d_Const(dbgi, tv);
1640                 return res;
1641         }
1642         case T___builtin_expect: {
1643                 expression_t *argument = call->arguments->expression;
1644                 return _expression_to_firm(argument);
1645         }
1646         case T___builtin_va_end:
1647                 /* evaluate the argument of va_end for its side effects */
1648                 _expression_to_firm(call->arguments->expression);
1649                 return NULL;
1650         default:
1651                 panic("unsupported builtin found");
1652         }
1653 }
1654
1655 /**
1656  * Transform a call expression.
1657  * Handles some special cases, like alloca() calls, which must be resolved
1658  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1659  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1660  * handled right...
1661  */
1662 static ir_node *call_expression_to_firm(const call_expression_t *call)
1663 {
1664         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1665         assert(get_cur_block() != NULL);
1666
1667         expression_t *function = call->function;
1668         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1669                 return process_builtin_call(call);
1670         }
1671         if (function->kind == EXPR_REFERENCE) {
1672                 const reference_expression_t *ref    = &function->reference;
1673                 entity_t                     *entity = ref->entity;
1674
1675                 if (entity->kind == ENTITY_FUNCTION
1676                                 && entity->function.entity == rts_entities[rts_alloca]) {
1677                         /* handle alloca() call */
1678                         expression_t *argument = call->arguments->expression;
1679                         ir_node      *size     = expression_to_firm(argument);
1680                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1681
1682                         size = create_conv(dbgi, size, mode);
1683
1684                         ir_node  *store  = get_store();
1685                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1686                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1687                                                        stack_alloc);
1688                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1689                         set_store(proj_m);
1690                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1691
1692                         return res;
1693                 }
1694         }
1695         ir_node *callee = expression_to_firm(function);
1696
1697         type_t *type = skip_typeref(function->base.type);
1698         assert(is_type_pointer(type));
1699         pointer_type_t *pointer_type = &type->pointer;
1700         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1701         assert(is_type_function(points_to));
1702         function_type_t *function_type = &points_to->function;
1703
1704         int      n_parameters = 0;
1705         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1706         ir_type *new_method_type = NULL;
1707         if (function_type->variadic || function_type->unspecified_parameters) {
1708                 const call_argument_t *argument = call->arguments;
1709                 for ( ; argument != NULL; argument = argument->next) {
1710                         ++n_parameters;
1711                 }
1712
1713                 /* we need to construct a new method type matching the call
1714                  * arguments... */
1715                 int n_res       = get_method_n_ress(ir_method_type);
1716                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1717                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1718                                                     n_parameters, n_res, dbgi);
1719                 set_method_calling_convention(new_method_type,
1720                                get_method_calling_convention(ir_method_type));
1721                 set_method_additional_properties(new_method_type,
1722                                get_method_additional_properties(ir_method_type));
1723                 set_method_variadicity(new_method_type,
1724                                        get_method_variadicity(ir_method_type));
1725
1726                 for (int i = 0; i < n_res; ++i) {
1727                         set_method_res_type(new_method_type, i,
1728                                             get_method_res_type(ir_method_type, i));
1729                 }
1730                 argument = call->arguments;
1731                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1732                         expression_t *expression = argument->expression;
1733                         ir_type      *irtype     = get_ir_type(expression->base.type);
1734                         set_method_param_type(new_method_type, i, irtype);
1735                 }
1736                 ir_method_type = new_method_type;
1737         } else {
1738                 n_parameters = get_method_n_params(ir_method_type);
1739         }
1740
1741         ir_node *in[n_parameters];
1742
1743         const call_argument_t *argument = call->arguments;
1744         for (int n = 0; n < n_parameters; ++n) {
1745                 expression_t *expression = argument->expression;
1746                 ir_node      *arg_node   = expression_to_firm(expression);
1747
1748                 type_t  *type = skip_typeref(expression->base.type);
1749                 if (!is_type_compound(type)) {
1750                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1751                         arg_node      = create_conv(dbgi, arg_node, mode);
1752                         arg_node      = do_strict_conv(dbgi, arg_node);
1753                 }
1754
1755                 in[n] = arg_node;
1756
1757                 argument = argument->next;
1758         }
1759
1760         ir_node  *store = get_store();
1761         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1762                                      ir_method_type);
1763         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1764         set_store(mem);
1765
1766         type_t  *return_type = skip_typeref(function_type->return_type);
1767         ir_node *result      = NULL;
1768
1769         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1770                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1771
1772                 if (is_type_scalar(return_type)) {
1773                         ir_mode *mode       = get_ir_mode_storage(return_type);
1774                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1775                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1776                         result              = create_conv(NULL, result, mode_arith);
1777                 } else {
1778                         ir_mode *mode = mode_P_data;
1779                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1780                 }
1781         }
1782
1783         if (function->kind == EXPR_REFERENCE &&
1784             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1785                 /* A dead end:  Keep the Call and the Block.  Also place all further
1786                  * nodes into a new and unreachable block. */
1787                 keep_alive(node);
1788                 keep_alive(get_cur_block());
1789                 new_Block(0, NULL);
1790         }
1791
1792         return result;
1793 }
1794
1795 static void statement_to_firm(statement_t *statement);
1796 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1797
1798 static ir_node *expression_to_addr(const expression_t *expression);
1799 static ir_node *create_condition_evaluation(const expression_t *expression,
1800                                             ir_node *true_block,
1801                                             ir_node *false_block);
1802
1803 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1804                          ir_node *value)
1805 {
1806         if (!is_type_compound(type)) {
1807                 ir_mode *mode = get_ir_mode_storage(type);
1808                 value         = create_conv(dbgi, value, mode);
1809                 value         = do_strict_conv(dbgi, value);
1810         }
1811
1812         ir_node *memory = get_store();
1813
1814         if (is_type_scalar(type)) {
1815                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1816                                       ? cons_volatile : 0;
1817                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1818                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1819                 set_store(store_mem);
1820         } else {
1821                 ir_type *irtype    = get_ir_type(type);
1822                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1823                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1824                 set_store(copyb_mem);
1825         }
1826 }
1827
1828 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1829 {
1830         tarval *all_one   = get_mode_all_one(mode);
1831         int     mode_size = get_mode_size_bits(mode);
1832
1833         assert(offset >= 0);
1834         assert(size   >= 0);
1835         assert(offset + size <= mode_size);
1836         if (size == mode_size) {
1837                 return all_one;
1838         }
1839
1840         long    shiftr    = get_mode_size_bits(mode) - size;
1841         long    shiftl    = offset;
1842         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1843         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1844         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1845         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1846
1847         return mask1;
1848 }
1849
1850 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1851                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1852 {
1853         ir_type *entity_type = get_entity_type(entity);
1854         ir_type *base_type   = get_primitive_base_type(entity_type);
1855         assert(base_type != NULL);
1856         ir_mode *mode        = get_type_mode(base_type);
1857
1858         value = create_conv(dbgi, value, mode);
1859
1860         /* kill upper bits of value and shift to right position */
1861         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1862         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1863
1864         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1865         ir_node *mask_node       = new_d_Const(dbgi, mask);
1866         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1867         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1868         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1869         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1870
1871         /* load current value */
1872         ir_node  *mem             = get_store();
1873         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1874                                         set_volatile ? cons_volatile : 0);
1875         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1876         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1877         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1878         tarval   *inv_mask        = tarval_not(shift_mask);
1879         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1880         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1881
1882         /* construct new value and store */
1883         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1884         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1885                                          set_volatile ? cons_volatile : 0);
1886         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1887         set_store(store_mem);
1888
1889         return value_masked;
1890 }
1891
1892 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1893                 ir_node *addr)
1894 {
1895         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1896         type_t   *type     = expression->base.type;
1897         ir_mode  *mode     = get_ir_mode_storage(type);
1898         ir_node  *mem      = get_store();
1899         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, 0);
1900         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1901         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1902
1903         load_res           = create_conv(dbgi, load_res, mode_int);
1904
1905         set_store(load_mem);
1906
1907         /* kill upper bits */
1908         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1909         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1910         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1911         ir_type   *entity_type  = get_entity_type(entity);
1912         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1913         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1914         assert(shift_bitsl >= 0);
1915         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1916         ir_node   *countl       = new_d_Const(dbgi, tvl);
1917         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1918
1919         long       shift_bitsr  = bitoffset + shift_bitsl;
1920         assert(shift_bitsr <= (long) machine_size);
1921         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1922         ir_node   *countr       = new_d_Const(dbgi, tvr);
1923         ir_node   *shiftr;
1924         if (mode_is_signed(mode)) {
1925                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1926         } else {
1927                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1928         }
1929
1930         return create_conv(dbgi, shiftr, mode);
1931 }
1932
1933 /* make sure the selected compound type is constructed */
1934 static void construct_select_compound(const select_expression_t *expression)
1935 {
1936         type_t *type = skip_typeref(expression->compound->base.type);
1937         if (is_type_pointer(type)) {
1938                 type = type->pointer.points_to;
1939         }
1940         (void) get_ir_type(type);
1941 }
1942
1943 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1944                                               ir_node *value, ir_node *addr)
1945 {
1946         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1947         type_t   *type = skip_typeref(expression->base.type);
1948
1949         if (!is_type_compound(type)) {
1950                 ir_mode  *mode = get_ir_mode_storage(type);
1951                 value          = create_conv(dbgi, value, mode);
1952                 value          = do_strict_conv(dbgi, value);
1953         }
1954
1955         if (expression->kind == EXPR_REFERENCE) {
1956                 const reference_expression_t *ref = &expression->reference;
1957
1958                 entity_t *entity = ref->entity;
1959                 assert(is_declaration(entity));
1960                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1961                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1962                         set_value(entity->variable.v.value_number, value);
1963                         return value;
1964                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1965                         set_value(entity->parameter.v.value_number, value);
1966                         return value;
1967                 }
1968         }
1969
1970         if (addr == NULL)
1971                 addr = expression_to_addr(expression);
1972         assert(addr != NULL);
1973
1974         if (expression->kind == EXPR_SELECT) {
1975                 const select_expression_t *select = &expression->select;
1976
1977                 construct_select_compound(select);
1978
1979                 entity_t *entity = select->compound_entry;
1980                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1981                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1982                         ir_entity *irentity = entity->compound_member.entity;
1983                         bool       set_volatile
1984                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1985                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1986                                                        set_volatile);
1987                         return value;
1988                 }
1989         }
1990
1991         assign_value(dbgi, addr, type, value);
1992         return value;
1993 }
1994
1995 static void set_value_for_expression(const expression_t *expression,
1996                                      ir_node *value)
1997 {
1998         set_value_for_expression_addr(expression, value, NULL);
1999 }
2000
2001 static ir_node *get_value_from_lvalue(const expression_t *expression,
2002                                       ir_node *addr)
2003 {
2004         if (expression->kind == EXPR_REFERENCE) {
2005                 const reference_expression_t *ref = &expression->reference;
2006
2007                 entity_t *entity = ref->entity;
2008                 assert(entity->kind == ENTITY_VARIABLE
2009                                 || entity->kind == ENTITY_PARAMETER);
2010                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2011                 int value_number;
2012                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2013                         value_number = entity->variable.v.value_number;
2014                         assert(addr == NULL);
2015                         type_t  *type = skip_typeref(expression->base.type);
2016                         ir_mode *mode = get_ir_mode_storage(type);
2017                         ir_node *res  = get_value(value_number, mode);
2018                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2019                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2020                         value_number = entity->parameter.v.value_number;
2021                         assert(addr == NULL);
2022                         type_t  *type = skip_typeref(expression->base.type);
2023                         ir_mode *mode = get_ir_mode_storage(type);
2024                         ir_node *res  = get_value(value_number, mode);
2025                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2026                 }
2027         }
2028
2029         assert(addr != NULL);
2030         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2031
2032         ir_node *value;
2033         if (expression->kind == EXPR_SELECT &&
2034             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2035             construct_select_compound(&expression->select);
2036                 value = bitfield_extract_to_firm(&expression->select, addr);
2037         } else {
2038                 value = deref_address(dbgi, expression->base.type, addr);
2039         }
2040
2041         return value;
2042 }
2043
2044
2045 static ir_node *create_incdec(const unary_expression_t *expression)
2046 {
2047         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2048         const expression_t *value_expr = expression->value;
2049         ir_node            *addr       = expression_to_addr(value_expr);
2050         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2051
2052         type_t  *type = skip_typeref(expression->base.type);
2053         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2054
2055         ir_node *offset;
2056         if (is_type_pointer(type)) {
2057                 pointer_type_t *pointer_type = &type->pointer;
2058                 offset                       = get_type_size(pointer_type->points_to);
2059         } else {
2060                 assert(is_type_arithmetic(type));
2061                 offset = new_Const(get_mode_one(mode));
2062         }
2063
2064         ir_node *result;
2065         ir_node *store_value;
2066         switch(expression->base.kind) {
2067         case EXPR_UNARY_POSTFIX_INCREMENT:
2068                 result      = value;
2069                 store_value = new_d_Add(dbgi, value, offset, mode);
2070                 break;
2071         case EXPR_UNARY_POSTFIX_DECREMENT:
2072                 result      = value;
2073                 store_value = new_d_Sub(dbgi, value, offset, mode);
2074                 break;
2075         case EXPR_UNARY_PREFIX_INCREMENT:
2076                 result      = new_d_Add(dbgi, value, offset, mode);
2077                 store_value = result;
2078                 break;
2079         case EXPR_UNARY_PREFIX_DECREMENT:
2080                 result      = new_d_Sub(dbgi, value, offset, mode);
2081                 store_value = result;
2082                 break;
2083         default:
2084                 panic("no incdec expr in create_incdec");
2085         }
2086
2087         set_value_for_expression_addr(value_expr, store_value, addr);
2088
2089         return result;
2090 }
2091
2092 static bool is_local_variable(expression_t *expression)
2093 {
2094         if (expression->kind != EXPR_REFERENCE)
2095                 return false;
2096         reference_expression_t *ref_expr = &expression->reference;
2097         entity_t               *entity   = ref_expr->entity;
2098         if (entity->kind != ENTITY_VARIABLE)
2099                 return false;
2100         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2101         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2102 }
2103
2104 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2105 {
2106         switch(kind) {
2107         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2108         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2109         case EXPR_BINARY_NOTEQUAL:
2110                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2111         case EXPR_BINARY_ISLESS:
2112         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2113         case EXPR_BINARY_ISLESSEQUAL:
2114         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2115         case EXPR_BINARY_ISGREATER:
2116         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2117         case EXPR_BINARY_ISGREATEREQUAL:
2118         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2119         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2120
2121         default:
2122                 break;
2123         }
2124         panic("trying to get pn_Cmp from non-comparison binexpr type");
2125 }
2126
2127 /**
2128  * Handle the assume optimizer hint: check if a Confirm
2129  * node can be created.
2130  *
2131  * @param dbi    debug info
2132  * @param expr   the IL assume expression
2133  *
2134  * we support here only some simple cases:
2135  *  - var rel const
2136  *  - const rel val
2137  *  - var rel var
2138  */
2139 static ir_node *handle_assume_compare(dbg_info *dbi,
2140                                       const binary_expression_t *expression)
2141 {
2142         expression_t *op1 = expression->left;
2143         expression_t *op2 = expression->right;
2144         entity_t     *var2, *var = NULL;
2145         ir_node      *res = NULL;
2146         pn_Cmp        cmp_val;
2147
2148         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2149
2150         if (is_local_variable(op1) && is_local_variable(op2)) {
2151         var  = op1->reference.entity;
2152             var2 = op2->reference.entity;
2153
2154                 type_t  *const type = skip_typeref(var->declaration.type);
2155                 ir_mode *const mode = get_ir_mode_storage(type);
2156
2157                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2158                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2159
2160                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2161                 set_value(var2->variable.v.value_number, res);
2162
2163                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2164                 set_value(var->variable.v.value_number, res);
2165
2166                 return res;
2167         }
2168
2169         expression_t *con;
2170         if (is_local_variable(op1) && is_constant_expression(op2)) {
2171                 var = op1->reference.entity;
2172                 con = op2;
2173         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2174                 cmp_val = get_inversed_pnc(cmp_val);
2175                 var = op2->reference.entity;
2176                 con = op1;
2177         }
2178
2179         if (var != NULL) {
2180                 type_t  *const type = skip_typeref(var->declaration.type);
2181                 ir_mode *const mode = get_ir_mode_storage(type);
2182
2183                 res = get_value(var->variable.v.value_number, mode);
2184                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2185                 set_value(var->variable.v.value_number, res);
2186         }
2187         return res;
2188 }
2189
2190 /**
2191  * Handle the assume optimizer hint.
2192  *
2193  * @param dbi    debug info
2194  * @param expr   the IL assume expression
2195  */
2196 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2197 {
2198         switch(expression->kind) {
2199         case EXPR_BINARY_EQUAL:
2200         case EXPR_BINARY_NOTEQUAL:
2201         case EXPR_BINARY_LESS:
2202         case EXPR_BINARY_LESSEQUAL:
2203         case EXPR_BINARY_GREATER:
2204         case EXPR_BINARY_GREATEREQUAL:
2205                 return handle_assume_compare(dbi, &expression->binary);
2206         default:
2207                 return NULL;
2208         }
2209 }
2210
2211 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2212 {
2213         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2214         type_t   *type = skip_typeref(expression->base.type);
2215
2216         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2217                 return expression_to_addr(expression->value);
2218
2219         const expression_t *value = expression->value;
2220
2221         switch(expression->base.kind) {
2222         case EXPR_UNARY_NEGATE: {
2223                 ir_node *value_node = expression_to_firm(value);
2224                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2225                 return new_d_Minus(dbgi, value_node, mode);
2226         }
2227         case EXPR_UNARY_PLUS:
2228                 return expression_to_firm(value);
2229         case EXPR_UNARY_BITWISE_NEGATE: {
2230                 ir_node *value_node = expression_to_firm(value);
2231                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2232                 return new_d_Not(dbgi, value_node, mode);
2233         }
2234         case EXPR_UNARY_NOT: {
2235                 ir_node *value_node = _expression_to_firm(value);
2236                 value_node          = create_conv(dbgi, value_node, mode_b);
2237                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2238                 return res;
2239         }
2240         case EXPR_UNARY_DEREFERENCE: {
2241                 ir_node *value_node = expression_to_firm(value);
2242                 type_t  *value_type = skip_typeref(value->base.type);
2243                 assert(is_type_pointer(value_type));
2244                 type_t  *points_to  = value_type->pointer.points_to;
2245                 return deref_address(dbgi, points_to, value_node);
2246         }
2247         case EXPR_UNARY_POSTFIX_INCREMENT:
2248         case EXPR_UNARY_POSTFIX_DECREMENT:
2249         case EXPR_UNARY_PREFIX_INCREMENT:
2250         case EXPR_UNARY_PREFIX_DECREMENT:
2251                 return create_incdec(expression);
2252         case EXPR_UNARY_CAST: {
2253                 ir_node *value_node = expression_to_firm(value);
2254                 if (is_type_scalar(type)) {
2255                         ir_mode *mode       = get_ir_mode_storage(type);
2256                         ir_node *node       = create_conv(dbgi, value_node, mode);
2257                         node                = do_strict_conv(dbgi, node);
2258                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2259                         node                = create_conv(dbgi, node, mode_arith);
2260                         return node;
2261                 } else {
2262                         /* make sure firm type is constructed */
2263                         (void) get_ir_type(type);
2264                         return value_node;
2265                 }
2266         }
2267         case EXPR_UNARY_CAST_IMPLICIT: {
2268                 ir_node *value_node = expression_to_firm(value);
2269                 if (is_type_scalar(type)) {
2270                         ir_mode *mode       = get_ir_mode_storage(type);
2271                         ir_node *res        = create_conv(dbgi, value_node, mode);
2272                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2273                         res                 = create_conv(dbgi, res, mode_arith);
2274                         return res;
2275                 } else {
2276                         return value_node;
2277                 }
2278         }
2279         case EXPR_UNARY_ASSUME:
2280                 if (firm_opt.confirm)
2281                         return handle_assume(dbgi, value);
2282                 else
2283                         return NULL;
2284
2285         default:
2286                 break;
2287         }
2288         panic("invalid UNEXPR type found");
2289 }
2290
2291 /**
2292  * produces a 0/1 depending of the value of a mode_b node
2293  */
2294 static ir_node *produce_condition_result(const expression_t *expression,
2295                                          ir_mode *mode, dbg_info *dbgi)
2296 {
2297         ir_node *cur_block = get_cur_block();
2298
2299         ir_node *one_block = new_immBlock();
2300         set_cur_block(one_block);
2301         ir_node *one       = new_Const(get_mode_one(mode));
2302         ir_node *jmp_one   = new_d_Jmp(dbgi);
2303
2304         ir_node *zero_block = new_immBlock();
2305         set_cur_block(zero_block);
2306         ir_node *zero       = new_Const(get_mode_null(mode));
2307         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2308
2309         set_cur_block(cur_block);
2310         create_condition_evaluation(expression, one_block, zero_block);
2311         mature_immBlock(one_block);
2312         mature_immBlock(zero_block);
2313
2314         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2315         new_Block(2, in_cf);
2316
2317         ir_node *in[2] = { one, zero };
2318         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2319
2320         return val;
2321 }
2322
2323 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2324                 ir_node *value, type_t *type)
2325 {
2326         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2327         assert(is_type_pointer(type));
2328         pointer_type_t *const pointer_type = &type->pointer;
2329         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2330         unsigned              elem_size    = get_type_size_const(points_to);
2331
2332         value = create_conv(dbgi, value, mode);
2333
2334         /* gcc extension: allow arithmetic with void * and function * */
2335         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2336             is_type_function(points_to))  {
2337                 elem_size = 1;
2338         }
2339
2340         assert(elem_size >= 1);
2341         if (elem_size == 1)
2342                 return value;
2343
2344         ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2345         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode);
2346         return mul;
2347 }
2348
2349 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2350                           ir_node *left, ir_node *right)
2351 {
2352         ir_mode  *mode;
2353         type_t   *type_left  = skip_typeref(expression->left->base.type);
2354         type_t   *type_right = skip_typeref(expression->right->base.type);
2355
2356         expression_kind_t kind = expression->base.kind;
2357
2358         switch (kind) {
2359         case EXPR_BINARY_SHIFTLEFT:
2360         case EXPR_BINARY_SHIFTRIGHT:
2361         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2362         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2363                 mode  = get_irn_mode(left);
2364                 right = create_conv(dbgi, right, mode_uint);
2365                 break;
2366
2367         case EXPR_BINARY_SUB:
2368                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2369                         const pointer_type_t *const ptr_type = &type_left->pointer;
2370
2371                         mode = get_ir_mode_arithmetic(expression->base.type);
2372                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2373                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2374                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2375                         ir_node *const no_mem    = new_NoMem();
2376                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2377                                                                                                    mode, op_pin_state_floats);
2378                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2379                 }
2380                 /* fallthrough */
2381         case EXPR_BINARY_SUB_ASSIGN:
2382                 if (is_type_pointer(type_left)) {
2383                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2384                         mode  = get_ir_mode_arithmetic(type_left);
2385                         break;
2386                 }
2387                 goto normal_node;
2388
2389         case EXPR_BINARY_ADD:
2390         case EXPR_BINARY_ADD_ASSIGN:
2391                 if (is_type_pointer(type_left)) {
2392                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2393                         mode  = get_ir_mode_arithmetic(type_left);
2394                         break;
2395                 } else if (is_type_pointer(type_right)) {
2396                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2397                         mode  = get_ir_mode_arithmetic(type_right);
2398                         break;
2399                 }
2400                 goto normal_node;
2401
2402         default:
2403 normal_node:
2404                 mode = get_ir_mode_arithmetic(type_right);
2405                 left = create_conv(dbgi, left, mode);
2406                 break;
2407         }
2408
2409         switch (kind) {
2410         case EXPR_BINARY_ADD_ASSIGN:
2411         case EXPR_BINARY_ADD:
2412                 return new_d_Add(dbgi, left, right, mode);
2413         case EXPR_BINARY_SUB_ASSIGN:
2414         case EXPR_BINARY_SUB:
2415                 return new_d_Sub(dbgi, left, right, mode);
2416         case EXPR_BINARY_MUL_ASSIGN:
2417         case EXPR_BINARY_MUL:
2418                 return new_d_Mul(dbgi, left, right, mode);
2419         case EXPR_BINARY_BITWISE_AND:
2420         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2421                 return new_d_And(dbgi, left, right, mode);
2422         case EXPR_BINARY_BITWISE_OR:
2423         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2424                 return new_d_Or(dbgi, left, right, mode);
2425         case EXPR_BINARY_BITWISE_XOR:
2426         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2427                 return new_d_Eor(dbgi, left, right, mode);
2428         case EXPR_BINARY_SHIFTLEFT:
2429         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2430                 return new_d_Shl(dbgi, left, right, mode);
2431         case EXPR_BINARY_SHIFTRIGHT:
2432         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2433                 if (mode_is_signed(mode)) {
2434                         return new_d_Shrs(dbgi, left, right, mode);
2435                 } else {
2436                         return new_d_Shr(dbgi, left, right, mode);
2437                 }
2438         case EXPR_BINARY_DIV:
2439         case EXPR_BINARY_DIV_ASSIGN: {
2440                 ir_node *pin = new_Pin(new_NoMem());
2441                 ir_node *op;
2442                 ir_node *res;
2443                 if (mode_is_float(mode)) {
2444                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2445                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2446                 } else {
2447                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2448                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2449                 }
2450                 return res;
2451         }
2452         case EXPR_BINARY_MOD:
2453         case EXPR_BINARY_MOD_ASSIGN: {
2454                 ir_node *pin = new_Pin(new_NoMem());
2455                 assert(!mode_is_float(mode));
2456                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2457                                          op_pin_state_floats);
2458                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2459                 return res;
2460         }
2461         default:
2462                 panic("unexpected expression kind");
2463         }
2464 }
2465
2466 static ir_node *create_lazy_op(const binary_expression_t *expression)
2467 {
2468         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2469         type_t   *type = skip_typeref(expression->base.type);
2470         ir_mode  *mode = get_ir_mode_arithmetic(type);
2471
2472         if (is_constant_expression(expression->left)) {
2473                 long val = fold_constant(expression->left);
2474                 expression_kind_t ekind = expression->base.kind;
2475                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2476                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2477                         if (val == 0) {
2478                                 return new_Const(get_mode_null(mode));
2479                         }
2480                 } else {
2481                         if (val != 0) {
2482                                 return new_Const(get_mode_one(mode));
2483                         }
2484                 }
2485
2486                 if (is_constant_expression(expression->right)) {
2487                         long const valr = fold_constant(expression->right);
2488                         return valr != 0 ?
2489                                 new_Const(get_mode_one(mode)) :
2490                                 new_Const(get_mode_null(mode));
2491                 }
2492
2493                 return produce_condition_result(expression->right, mode, dbgi);
2494         }
2495
2496         return produce_condition_result((const expression_t*) expression, mode,
2497                                         dbgi);
2498 }
2499
2500 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2501                                             ir_node *right, ir_mode *mode);
2502
2503 static ir_node *create_assign_binop(const binary_expression_t *expression)
2504 {
2505         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2506         const expression_t *left_expr = expression->left;
2507         type_t             *type      = skip_typeref(left_expr->base.type);
2508         ir_mode            *left_mode = get_ir_mode_storage(type);
2509         ir_node            *right     = expression_to_firm(expression->right);
2510         ir_node            *left_addr = expression_to_addr(left_expr);
2511         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2512         ir_node            *result    = create_op(dbgi, expression, left, right);
2513
2514         result = create_conv(dbgi, result, left_mode);
2515         result = do_strict_conv(dbgi, result);
2516
2517         result = set_value_for_expression_addr(left_expr, result, left_addr);
2518
2519         if (!is_type_compound(type)) {
2520                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2521                 result = create_conv(dbgi, result, mode_arithmetic);
2522         }
2523         return result;
2524 }
2525
2526 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2527 {
2528         expression_kind_t kind = expression->base.kind;
2529
2530         switch(kind) {
2531         case EXPR_BINARY_EQUAL:
2532         case EXPR_BINARY_NOTEQUAL:
2533         case EXPR_BINARY_LESS:
2534         case EXPR_BINARY_LESSEQUAL:
2535         case EXPR_BINARY_GREATER:
2536         case EXPR_BINARY_GREATEREQUAL:
2537         case EXPR_BINARY_ISGREATER:
2538         case EXPR_BINARY_ISGREATEREQUAL:
2539         case EXPR_BINARY_ISLESS:
2540         case EXPR_BINARY_ISLESSEQUAL:
2541         case EXPR_BINARY_ISLESSGREATER:
2542         case EXPR_BINARY_ISUNORDERED: {
2543                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2544                 ir_node *left  = expression_to_firm(expression->left);
2545                 ir_node *right = expression_to_firm(expression->right);
2546                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2547                 long     pnc   = get_pnc(kind, expression->left->base.type);
2548                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2549                 return proj;
2550         }
2551         case EXPR_BINARY_ASSIGN: {
2552                 ir_node *addr  = expression_to_addr(expression->left);
2553                 ir_node *right = expression_to_firm(expression->right);
2554                 ir_node *res
2555                         = set_value_for_expression_addr(expression->left, right, addr);
2556
2557                 type_t  *type            = skip_typeref(expression->base.type);
2558                 if (!is_type_compound(type)) {
2559                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2560                         res                      = create_conv(NULL, res, mode_arithmetic);
2561                 }
2562                 return res;
2563         }
2564         case EXPR_BINARY_ADD:
2565         case EXPR_BINARY_SUB:
2566         case EXPR_BINARY_MUL:
2567         case EXPR_BINARY_DIV:
2568         case EXPR_BINARY_MOD:
2569         case EXPR_BINARY_BITWISE_AND:
2570         case EXPR_BINARY_BITWISE_OR:
2571         case EXPR_BINARY_BITWISE_XOR:
2572         case EXPR_BINARY_SHIFTLEFT:
2573         case EXPR_BINARY_SHIFTRIGHT:
2574         {
2575                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2576                 ir_node  *left  = expression_to_firm(expression->left);
2577                 ir_node  *right = expression_to_firm(expression->right);
2578                 return create_op(dbgi, expression, left, right);
2579         }
2580         case EXPR_BINARY_LOGICAL_AND:
2581         case EXPR_BINARY_LOGICAL_OR:
2582                 return create_lazy_op(expression);
2583         case EXPR_BINARY_COMMA:
2584                 /* create side effects of left side */
2585                 (void) expression_to_firm(expression->left);
2586                 return _expression_to_firm(expression->right);
2587
2588         case EXPR_BINARY_ADD_ASSIGN:
2589         case EXPR_BINARY_SUB_ASSIGN:
2590         case EXPR_BINARY_MUL_ASSIGN:
2591         case EXPR_BINARY_MOD_ASSIGN:
2592         case EXPR_BINARY_DIV_ASSIGN:
2593         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2594         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2595         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2596         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2597         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2598                 return create_assign_binop(expression);
2599         default:
2600                 panic("TODO binexpr type");
2601         }
2602 }
2603
2604 static ir_node *array_access_addr(const array_access_expression_t *expression)
2605 {
2606         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2607         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2608         ir_node  *offset      = expression_to_firm(expression->index);
2609         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2610         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2611         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2612
2613         return result;
2614 }
2615
2616 static ir_node *array_access_to_firm(
2617                 const array_access_expression_t *expression)
2618 {
2619         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2620         ir_node  *addr   = array_access_addr(expression);
2621         type_t   *type   = revert_automatic_type_conversion(
2622                         (const expression_t*) expression);
2623         type             = skip_typeref(type);
2624
2625         return deref_address(dbgi, type, addr);
2626 }
2627
2628 static long get_offsetof_offset(const offsetof_expression_t *expression)
2629 {
2630         type_t *orig_type = expression->type;
2631         long    offset    = 0;
2632
2633         designator_t *designator = expression->designator;
2634         for ( ; designator != NULL; designator = designator->next) {
2635                 type_t *type = skip_typeref(orig_type);
2636                 /* be sure the type is constructed */
2637                 (void) get_ir_type(type);
2638
2639                 if (designator->symbol != NULL) {
2640                         assert(is_type_compound(type));
2641                         symbol_t *symbol = designator->symbol;
2642
2643                         compound_t *compound = type->compound.compound;
2644                         entity_t   *iter     = compound->members.entities;
2645                         for ( ; iter != NULL; iter = iter->base.next) {
2646                                 if (iter->base.symbol == symbol) {
2647                                         break;
2648                                 }
2649                         }
2650                         assert(iter != NULL);
2651
2652                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2653                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2654                         offset += get_entity_offset(iter->compound_member.entity);
2655
2656                         orig_type = iter->declaration.type;
2657                 } else {
2658                         expression_t *array_index = designator->array_index;
2659                         assert(designator->array_index != NULL);
2660                         assert(is_type_array(type));
2661
2662                         long index         = fold_constant(array_index);
2663                         ir_type *arr_type  = get_ir_type(type);
2664                         ir_type *elem_type = get_array_element_type(arr_type);
2665                         long     elem_size = get_type_size_bytes(elem_type);
2666
2667                         offset += index * elem_size;
2668
2669                         orig_type = type->array.element_type;
2670                 }
2671         }
2672
2673         return offset;
2674 }
2675
2676 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2677 {
2678         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2679         long      offset = get_offsetof_offset(expression);
2680         tarval   *tv     = new_tarval_from_long(offset, mode);
2681         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2682
2683         return new_d_Const(dbgi, tv);
2684 }
2685
2686 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2687                                      ir_entity *entity, type_t *type);
2688
2689 static ir_node *compound_literal_to_firm(
2690                 const compound_literal_expression_t *expression)
2691 {
2692         type_t *type = expression->type;
2693
2694         /* create an entity on the stack */
2695         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2696
2697         ident     *const id     = id_unique("CompLit.%u");
2698         ir_type   *const irtype = get_ir_type(type);
2699         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2700         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2701         set_entity_ld_ident(entity, id);
2702
2703         set_entity_variability(entity, variability_uninitialized);
2704
2705         /* create initialisation code */
2706         initializer_t *initializer = expression->initializer;
2707         create_local_initializer(initializer, dbgi, entity, type);
2708
2709         /* create a sel for the compound literal address */
2710         ir_node *frame = get_local_frame(entity);
2711         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2712         return sel;
2713 }
2714
2715 /**
2716  * Transform a sizeof expression into Firm code.
2717  */
2718 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2719 {
2720         type_t *type = expression->type;
2721         if (type == NULL) {
2722                 type = expression->tp_expression->base.type;
2723                 assert(type != NULL);
2724         }
2725
2726         type = skip_typeref(type);
2727         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2728         if (is_type_array(type) && type->array.is_vla
2729                         && expression->tp_expression != NULL) {
2730                 expression_to_firm(expression->tp_expression);
2731         }
2732
2733         return get_type_size(type);
2734 }
2735
2736 static entity_t *get_expression_entity(const expression_t *expression)
2737 {
2738         if (expression->kind != EXPR_REFERENCE)
2739                 return NULL;
2740
2741         return expression->reference.entity;
2742 }
2743
2744 /**
2745  * Transform an alignof expression into Firm code.
2746  */
2747 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2748 {
2749         ir_entity *irentity = NULL;
2750
2751         const expression_t *tp_expression = expression->tp_expression;
2752         if (tp_expression != NULL) {
2753                 entity_t *entity = get_expression_entity(tp_expression);
2754                 if (entity != NULL && is_declaration(entity)) {
2755                         switch (entity->declaration.kind) {
2756                         case DECLARATION_KIND_UNKNOWN:
2757                                 panic("unknown entity reference found");
2758                         case DECLARATION_KIND_COMPOUND_MEMBER:
2759                                 irentity = entity->compound_member.entity;
2760                                 break;
2761                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2762                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2763                                 irentity = entity->variable.v.entity;
2764                                 break;
2765                         case DECLARATION_KIND_PARAMETER_ENTITY:
2766                                 irentity = entity->parameter.v.entity;
2767                                 break;
2768                         case DECLARATION_KIND_FUNCTION:
2769                         case DECLARATION_KIND_INNER_FUNCTION:
2770                                 irentity = entity->function.entity;
2771                                 break;
2772                         case DECLARATION_KIND_PARAMETER:
2773                         case DECLARATION_KIND_LOCAL_VARIABLE:
2774                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2775                                 break;
2776                         }
2777                 }
2778         }
2779
2780         ir_type *irtype;
2781         if (irentity != NULL) {
2782                 irtype = get_entity_type(irentity);
2783         } else {
2784                 type_t *type = expression->type;
2785                 irtype = get_ir_type(type);
2786         }
2787
2788         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2789         symconst_symbol sym;
2790         sym.type_p = irtype;
2791         return new_SymConst(mode, sym, symconst_type_align);
2792 }
2793
2794 static void init_ir_types(void);
2795
2796 long fold_constant(const expression_t *expression)
2797 {
2798         assert(is_type_valid(skip_typeref(expression->base.type)));
2799
2800         bool constant_folding_old = constant_folding;
2801         constant_folding = true;
2802
2803         init_ir_types();
2804
2805         assert(is_constant_expression(expression));
2806
2807         ir_graph *old_current_ir_graph = current_ir_graph;
2808         current_ir_graph = get_const_code_irg();
2809
2810         ir_node *cnst = expression_to_firm(expression);
2811         current_ir_graph = old_current_ir_graph;
2812
2813         if (!is_Const(cnst)) {
2814                 panic("couldn't fold constant");
2815         }
2816
2817         tarval *tv = get_Const_tarval(cnst);
2818         if (!tarval_is_long(tv)) {
2819                 panic("result of constant folding is not integer");
2820         }
2821
2822         constant_folding = constant_folding_old;
2823
2824         return get_tarval_long(tv);
2825 }
2826
2827 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2828 {
2829         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2830
2831         /* first try to fold a constant condition */
2832         if (is_constant_expression(expression->condition)) {
2833                 long val = fold_constant(expression->condition);
2834                 if (val) {
2835                         expression_t *true_expression = expression->true_expression;
2836                         if (true_expression == NULL)
2837                                 true_expression = expression->condition;
2838                         return expression_to_firm(true_expression);
2839                 } else {
2840                         return expression_to_firm(expression->false_expression);
2841                 }
2842         }
2843
2844         ir_node *cur_block   = get_cur_block();
2845
2846         /* create the true block */
2847         ir_node *true_block  = new_immBlock();
2848         set_cur_block(true_block);
2849
2850         ir_node *true_val = expression->true_expression != NULL ?
2851                 expression_to_firm(expression->true_expression) : NULL;
2852         ir_node *true_jmp = new_Jmp();
2853
2854         /* create the false block */
2855         ir_node *false_block = new_immBlock();
2856         set_cur_block(false_block);
2857
2858         ir_node *false_val = expression_to_firm(expression->false_expression);
2859         ir_node *false_jmp = new_Jmp();
2860
2861         /* create the condition evaluation */
2862         set_cur_block(cur_block);
2863         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2864         if (expression->true_expression == NULL) {
2865                 if (cond_expr != NULL) {
2866                         true_val = cond_expr;
2867                 } else {
2868                         /* Condition ended with a short circuit (&&, ||, !) operation.
2869                          * Generate a "1" as value for the true branch. */
2870                         true_val = new_Const(get_mode_one(mode_Is));
2871                 }
2872         }
2873         mature_immBlock(true_block);
2874         mature_immBlock(false_block);
2875
2876         /* create the common block */
2877         ir_node *in_cf[2] = { true_jmp, false_jmp };
2878         new_Block(2, in_cf);
2879
2880         /* TODO improve static semantics, so either both or no values are NULL */
2881         if (true_val == NULL || false_val == NULL)
2882                 return NULL;
2883
2884         ir_node *in[2] = { true_val, false_val };
2885         ir_mode *mode  = get_irn_mode(true_val);
2886         assert(get_irn_mode(false_val) == mode);
2887         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2888
2889         return val;
2890 }
2891
2892 /**
2893  * Returns an IR-node representing the address of a field.
2894  */
2895 static ir_node *select_addr(const select_expression_t *expression)
2896 {
2897         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2898
2899         construct_select_compound(expression);
2900
2901         ir_node *compound_addr = expression_to_firm(expression->compound);
2902
2903         entity_t *entry = expression->compound_entry;
2904         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2905         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2906
2907         if (constant_folding) {
2908                 ir_mode *mode = get_irn_mode(compound_addr);
2909                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2910                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2911                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2912         } else {
2913                 ir_entity *irentity = entry->compound_member.entity;
2914                 assert(irentity != NULL);
2915                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2916         }
2917 }
2918
2919 static ir_node *select_to_firm(const select_expression_t *expression)
2920 {
2921         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2922         ir_node  *addr = select_addr(expression);
2923         type_t   *type = revert_automatic_type_conversion(
2924                         (const expression_t*) expression);
2925         type           = skip_typeref(type);
2926
2927         entity_t *entry      = expression->compound_entry;
2928         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2929         type_t   *entry_type = skip_typeref(entry->declaration.type);
2930
2931         if (entry_type->kind == TYPE_BITFIELD) {
2932                 return bitfield_extract_to_firm(expression, addr);
2933         }
2934
2935         return deref_address(dbgi, type, addr);
2936 }
2937
2938 /* Values returned by __builtin_classify_type. */
2939 typedef enum gcc_type_class
2940 {
2941         no_type_class = -1,
2942         void_type_class,
2943         integer_type_class,
2944         char_type_class,
2945         enumeral_type_class,
2946         boolean_type_class,
2947         pointer_type_class,
2948         reference_type_class,
2949         offset_type_class,
2950         real_type_class,
2951         complex_type_class,
2952         function_type_class,
2953         method_type_class,
2954         record_type_class,
2955         union_type_class,
2956         array_type_class,
2957         string_type_class,
2958         set_type_class,
2959         file_type_class,
2960         lang_type_class
2961 } gcc_type_class;
2962
2963 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2964 {
2965         type_t *type = expr->type_expression->base.type;
2966
2967         /* FIXME gcc returns different values depending on whether compiling C or C++
2968          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2969         gcc_type_class tc;
2970         for (;;) {
2971                 type = skip_typeref(type);
2972                 switch (type->kind) {
2973                         case TYPE_ATOMIC: {
2974                                 const atomic_type_t *const atomic_type = &type->atomic;
2975                                 switch (atomic_type->akind) {
2976                                         /* should not be reached */
2977                                         case ATOMIC_TYPE_INVALID:
2978                                                 tc = no_type_class;
2979                                                 goto make_const;
2980
2981                                         /* gcc cannot do that */
2982                                         case ATOMIC_TYPE_VOID:
2983                                                 tc = void_type_class;
2984                                                 goto make_const;
2985
2986                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2987                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2988                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2989                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2990                                         case ATOMIC_TYPE_SHORT:
2991                                         case ATOMIC_TYPE_USHORT:
2992                                         case ATOMIC_TYPE_INT:
2993                                         case ATOMIC_TYPE_UINT:
2994                                         case ATOMIC_TYPE_LONG:
2995                                         case ATOMIC_TYPE_ULONG:
2996                                         case ATOMIC_TYPE_LONGLONG:
2997                                         case ATOMIC_TYPE_ULONGLONG:
2998                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2999                                                 tc = integer_type_class;
3000                                                 goto make_const;
3001
3002                                         case ATOMIC_TYPE_FLOAT:
3003                                         case ATOMIC_TYPE_DOUBLE:
3004                                         case ATOMIC_TYPE_LONG_DOUBLE:
3005                                                 tc = real_type_class;
3006                                                 goto make_const;
3007                                 }
3008                                 panic("Unexpected atomic type in classify_type_to_firm().");
3009                         }
3010
3011                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3012                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3013                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3014                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3015                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3016                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3017                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3018                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3019
3020                         /* gcc handles this as integer */
3021                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3022
3023                         /* gcc classifies the referenced type */
3024                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3025
3026                         case TYPE_BUILTIN:
3027                         /* typedef/typeof should be skipped already */
3028                         case TYPE_TYPEDEF:
3029                         case TYPE_TYPEOF:
3030                         case TYPE_INVALID:
3031                         case TYPE_ERROR:
3032                                 break;
3033                 }
3034                 panic("unexpected TYPE classify_type_to_firm().");
3035         }
3036
3037 make_const:;
3038         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3039         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3040         return new_d_Const(dbgi, tv);
3041 }
3042
3043 static ir_node *function_name_to_firm(
3044                 const funcname_expression_t *const expr)
3045 {
3046         switch(expr->kind) {
3047         case FUNCNAME_FUNCTION:
3048         case FUNCNAME_PRETTY_FUNCTION:
3049         case FUNCNAME_FUNCDNAME:
3050                 if (current_function_name == NULL) {
3051                         const source_position_t *const src_pos = &expr->base.source_position;
3052                         const char    *name  = current_function_entity->base.symbol->string;
3053                         const string_t string = { name, strlen(name) + 1 };
3054                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3055                 }
3056                 return current_function_name;
3057         case FUNCNAME_FUNCSIG:
3058                 if (current_funcsig == NULL) {
3059                         const source_position_t *const src_pos = &expr->base.source_position;
3060                         ir_entity *ent = get_irg_entity(current_ir_graph);
3061                         const char *const name = get_entity_ld_name(ent);
3062                         const string_t string = { name, strlen(name) + 1 };
3063                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3064                 }
3065                 return current_funcsig;
3066         }
3067         panic("Unsupported function name");
3068 }
3069
3070 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3071 {
3072         statement_t *statement = expr->statement;
3073
3074         assert(statement->kind == STATEMENT_COMPOUND);
3075         return compound_statement_to_firm(&statement->compound);
3076 }
3077
3078 static ir_node *va_start_expression_to_firm(
3079         const va_start_expression_t *const expr)
3080 {
3081         type_t    *const type        = current_function_entity->declaration.type;
3082         ir_type   *const method_type = get_ir_type(type);
3083         int        const n           = get_method_n_params(method_type) - 1;
3084         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3085         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3086         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3087         ir_node   *const no_mem      = new_NoMem();
3088         ir_node   *const arg_sel     =
3089                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3090
3091         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3092         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3093         set_value_for_expression(expr->ap, add);
3094
3095         return NULL;
3096 }
3097
3098 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3099 {
3100         type_t       *const type    = expr->base.type;
3101         expression_t *const ap_expr = expr->ap;
3102         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3103         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3104         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3105         ir_node      *const res     = deref_address(dbgi, type, ap);
3106
3107         ir_node      *const cnst    = get_type_size(expr->base.type);
3108         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3109
3110         set_value_for_expression_addr(ap_expr, add, ap_addr);
3111
3112         return res;
3113 }
3114
3115 static ir_node *dereference_addr(const unary_expression_t *const expression)
3116 {
3117         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3118         return expression_to_firm(expression->value);
3119 }
3120
3121 /**
3122  * Returns a IR-node representing an lvalue of the given expression.
3123  */
3124 static ir_node *expression_to_addr(const expression_t *expression)
3125 {
3126         switch(expression->kind) {
3127         case EXPR_ARRAY_ACCESS:
3128                 return array_access_addr(&expression->array_access);
3129         case EXPR_CALL:
3130                 return call_expression_to_firm(&expression->call);
3131         case EXPR_COMPOUND_LITERAL:
3132                 return compound_literal_to_firm(&expression->compound_literal);
3133         case EXPR_REFERENCE:
3134                 return reference_addr(&expression->reference);
3135         case EXPR_SELECT:
3136                 return select_addr(&expression->select);
3137         case EXPR_UNARY_DEREFERENCE:
3138                 return dereference_addr(&expression->unary);
3139         default:
3140                 break;
3141         }
3142         panic("trying to get address of non-lvalue");
3143 }
3144
3145 static ir_node *builtin_constant_to_firm(
3146                 const builtin_constant_expression_t *expression)
3147 {
3148         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3149         long     v;
3150
3151         if (is_constant_expression(expression->value)) {
3152                 v = 1;
3153         } else {
3154                 v = 0;
3155         }
3156         return new_Const_long(mode, v);
3157 }
3158
3159 static ir_node *builtin_prefetch_to_firm(
3160                 const builtin_prefetch_expression_t *expression)
3161 {
3162         ir_node *adr = expression_to_firm(expression->adr);
3163         /* no Firm support for prefetch yet */
3164         (void) adr;
3165         return NULL;
3166 }
3167
3168 static ir_node *get_label_block(label_t *label)
3169 {
3170         if (label->block != NULL)
3171                 return label->block;
3172
3173         /* beware: might be called from create initializer with current_ir_graph
3174          * set to const_code_irg. */
3175         ir_graph *rem    = current_ir_graph;
3176         current_ir_graph = current_function;
3177
3178         ir_node *block = new_immBlock();
3179
3180         label->block = block;
3181
3182         ARR_APP1(label_t *, all_labels, label);
3183
3184         current_ir_graph = rem;
3185         return block;
3186 }
3187
3188 /**
3189  * Pointer to a label.  This is used for the
3190  * GNU address-of-label extension.
3191  */
3192 static ir_node *label_address_to_firm(
3193                 const label_address_expression_t *label)
3194 {
3195         ir_node    *block = get_label_block(label->label);
3196         ir_label_t  nr    = get_Block_label(block);
3197
3198         if (nr == 0) {
3199                 nr = get_irp_next_label_nr();
3200                 set_Block_label(block, nr);
3201         }
3202         symconst_symbol value;
3203         value.label = nr;
3204         return new_SymConst(mode_P_code, value, symconst_label);
3205 }
3206
3207 static ir_node *builtin_symbol_to_firm(
3208                 const builtin_symbol_expression_t *expression)
3209 {
3210         /* for gcc compatibility we have to produce (dummy) addresses for some
3211          * builtins */
3212         if (warning.other) {
3213                 warningf(&expression->base.source_position,
3214                                  "taking address of builtin '%Y'", expression->symbol);
3215         }
3216
3217         /* simply create a NULL pointer */
3218         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3219         ir_node  *res  = new_Const_long(mode, 0);
3220
3221         return res;
3222 }
3223
3224 /**
3225  * creates firm nodes for an expression. The difference between this function
3226  * and expression_to_firm is, that this version might produce mode_b nodes
3227  * instead of mode_Is.
3228  */
3229 static ir_node *_expression_to_firm(const expression_t *expression)
3230 {
3231 #ifndef NDEBUG
3232         if (!constant_folding) {
3233                 assert(!expression->base.transformed);
3234                 ((expression_t*) expression)->base.transformed = true;
3235         }
3236 #endif
3237
3238         switch (expression->kind) {
3239         case EXPR_CHARACTER_CONSTANT:
3240                 return character_constant_to_firm(&expression->conste);
3241         case EXPR_WIDE_CHARACTER_CONSTANT:
3242                 return wide_character_constant_to_firm(&expression->conste);
3243         case EXPR_CONST:
3244                 return const_to_firm(&expression->conste);
3245         case EXPR_STRING_LITERAL:
3246                 return string_literal_to_firm(&expression->string);
3247         case EXPR_WIDE_STRING_LITERAL:
3248                 return wide_string_literal_to_firm(&expression->wide_string);
3249         case EXPR_REFERENCE:
3250                 return reference_expression_to_firm(&expression->reference);
3251         case EXPR_REFERENCE_ENUM_VALUE:
3252                 return reference_expression_enum_value_to_firm(&expression->reference);
3253         case EXPR_CALL:
3254                 return call_expression_to_firm(&expression->call);
3255         EXPR_UNARY_CASES
3256                 return unary_expression_to_firm(&expression->unary);
3257         EXPR_BINARY_CASES
3258                 return binary_expression_to_firm(&expression->binary);
3259         case EXPR_ARRAY_ACCESS:
3260                 return array_access_to_firm(&expression->array_access);
3261         case EXPR_SIZEOF:
3262                 return sizeof_to_firm(&expression->typeprop);
3263         case EXPR_ALIGNOF:
3264                 return alignof_to_firm(&expression->typeprop);
3265         case EXPR_CONDITIONAL:
3266                 return conditional_to_firm(&expression->conditional);
3267         case EXPR_SELECT:
3268                 return select_to_firm(&expression->select);
3269         case EXPR_CLASSIFY_TYPE:
3270                 return classify_type_to_firm(&expression->classify_type);
3271         case EXPR_FUNCNAME:
3272                 return function_name_to_firm(&expression->funcname);
3273         case EXPR_STATEMENT:
3274                 return statement_expression_to_firm(&expression->statement);
3275         case EXPR_VA_START:
3276                 return va_start_expression_to_firm(&expression->va_starte);
3277         case EXPR_VA_ARG:
3278                 return va_arg_expression_to_firm(&expression->va_arge);
3279         case EXPR_BUILTIN_SYMBOL:
3280                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3281         case EXPR_BUILTIN_CONSTANT_P:
3282                 return builtin_constant_to_firm(&expression->builtin_constant);
3283         case EXPR_BUILTIN_PREFETCH:
3284                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3285         case EXPR_OFFSETOF:
3286                 return offsetof_to_firm(&expression->offsetofe);
3287         case EXPR_COMPOUND_LITERAL:
3288                 return compound_literal_to_firm(&expression->compound_literal);
3289         case EXPR_LABEL_ADDRESS:
3290                 return label_address_to_firm(&expression->label_address);
3291
3292         case EXPR_UNKNOWN:
3293         case EXPR_INVALID:
3294                 break;
3295         }
3296         panic("invalid expression found");
3297 }
3298
3299 static bool is_builtin_expect(const expression_t *expression)
3300 {
3301         if (expression->kind != EXPR_CALL)
3302                 return false;
3303
3304         expression_t *function = expression->call.function;
3305         if (function->kind != EXPR_BUILTIN_SYMBOL)
3306                 return false;
3307         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3308                 return false;
3309
3310         return true;
3311 }
3312
3313 static bool produces_mode_b(const expression_t *expression)
3314 {
3315         switch (expression->kind) {
3316         case EXPR_BINARY_EQUAL:
3317         case EXPR_BINARY_NOTEQUAL:
3318         case EXPR_BINARY_LESS:
3319         case EXPR_BINARY_LESSEQUAL:
3320         case EXPR_BINARY_GREATER:
3321         case EXPR_BINARY_GREATEREQUAL:
3322         case EXPR_BINARY_ISGREATER:
3323         case EXPR_BINARY_ISGREATEREQUAL:
3324         case EXPR_BINARY_ISLESS:
3325         case EXPR_BINARY_ISLESSEQUAL:
3326         case EXPR_BINARY_ISLESSGREATER:
3327         case EXPR_BINARY_ISUNORDERED:
3328         case EXPR_UNARY_NOT:
3329                 return true;
3330
3331         case EXPR_CALL:
3332                 if (is_builtin_expect(expression)) {
3333                         expression_t *argument = expression->call.arguments->expression;
3334                         return produces_mode_b(argument);
3335                 }
3336                 return false;
3337         case EXPR_BINARY_COMMA:
3338                 return produces_mode_b(expression->binary.right);
3339
3340         default:
3341                 return false;
3342         }
3343 }
3344
3345 static ir_node *expression_to_firm(const expression_t *expression)
3346 {
3347         if (!produces_mode_b(expression)) {
3348                 ir_node *res = _expression_to_firm(expression);
3349                 assert(res == NULL || get_irn_mode(res) != mode_b);
3350                 return res;
3351         }
3352
3353         if (is_constant_expression(expression)) {
3354                 ir_node *res  = _expression_to_firm(expression);
3355                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3356                 assert(is_Const(res));
3357                 if (is_Const_null(res)) {
3358                         return new_Const_long(mode, 0);
3359                 } else {
3360                         return new_Const_long(mode, 1);
3361                 }
3362         }
3363
3364         /* we have to produce a 0/1 from the mode_b expression */
3365         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3366         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3367         return produce_condition_result(expression, mode, dbgi);
3368 }
3369
3370 /**
3371  * create a short-circuit expression evaluation that tries to construct
3372  * efficient control flow structures for &&, || and ! expressions
3373  */
3374 static ir_node *create_condition_evaluation(const expression_t *expression,
3375                                             ir_node *true_block,
3376                                             ir_node *false_block)
3377 {
3378         switch(expression->kind) {
3379         case EXPR_UNARY_NOT: {
3380                 const unary_expression_t *unary_expression = &expression->unary;
3381                 create_condition_evaluation(unary_expression->value, false_block,
3382                                             true_block);
3383                 return NULL;
3384         }
3385         case EXPR_BINARY_LOGICAL_AND: {
3386                 const binary_expression_t *binary_expression = &expression->binary;
3387
3388                 ir_node *extra_block = new_immBlock();
3389                 create_condition_evaluation(binary_expression->left, extra_block,
3390                                             false_block);
3391                 mature_immBlock(extra_block);
3392                 set_cur_block(extra_block);
3393                 create_condition_evaluation(binary_expression->right, true_block,
3394                                             false_block);
3395                 return NULL;
3396         }
3397         case EXPR_BINARY_LOGICAL_OR: {
3398                 const binary_expression_t *binary_expression = &expression->binary;
3399
3400                 ir_node *extra_block = new_immBlock();
3401                 create_condition_evaluation(binary_expression->left, true_block,
3402                                             extra_block);
3403                 mature_immBlock(extra_block);
3404                 set_cur_block(extra_block);
3405                 create_condition_evaluation(binary_expression->right, true_block,
3406                                             false_block);
3407                 return NULL;
3408         }
3409         default:
3410                 break;
3411         }
3412
3413         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3414         ir_node  *cond_expr  = _expression_to_firm(expression);
3415         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3416         ir_node  *cond       = new_d_Cond(dbgi, condition);
3417         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3418         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3419
3420         /* set branch prediction info based on __builtin_expect */
3421         if (is_builtin_expect(expression) && is_Cond(cond)) {
3422                 call_argument_t *argument = expression->call.arguments->next;
3423                 if (is_constant_expression(argument->expression)) {
3424                         long               cnst = fold_constant(argument->expression);
3425                         cond_jmp_predicate pred;
3426
3427                         if (cnst == 0) {
3428                                 pred = COND_JMP_PRED_FALSE;
3429                         } else {
3430                                 pred = COND_JMP_PRED_TRUE;
3431                         }
3432                         set_Cond_jmp_pred(cond, pred);
3433                 }
3434         }
3435
3436         add_immBlock_pred(true_block, true_proj);
3437         add_immBlock_pred(false_block, false_proj);
3438
3439         set_cur_block(NULL);
3440         return cond_expr;
3441 }
3442
3443
3444 static void create_variable_entity(entity_t *variable,
3445                                    declaration_kind_t declaration_kind,
3446                                    ir_type *parent_type)
3447 {
3448         assert(variable->kind == ENTITY_VARIABLE);
3449         type_t    *type = skip_typeref(variable->declaration.type);
3450         type            = get_aligned_type(type, variable->variable.alignment);
3451
3452         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3453         ir_type   *const irtype   = get_ir_type(type);
3454         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3455
3456         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3457
3458         handle_gnu_attributes_ent(irentity, variable);
3459
3460         variable->declaration.kind  = (unsigned char) declaration_kind;
3461         variable->variable.v.entity = irentity;
3462         set_entity_variability(irentity, variability_uninitialized);
3463         set_entity_ld_ident(irentity, create_ld_ident(variable));
3464
3465         if (parent_type == get_tls_type())
3466                 set_entity_allocation(irentity, allocation_automatic);
3467         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3468                 set_entity_allocation(irentity, allocation_static);
3469
3470         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3471                 set_entity_volatility(irentity, volatility_is_volatile);
3472         }
3473 }
3474
3475
3476 typedef struct type_path_entry_t type_path_entry_t;
3477 struct type_path_entry_t {
3478         type_t           *type;
3479         ir_initializer_t *initializer;
3480         size_t            index;
3481         entity_t         *compound_entry;
3482 };
3483
3484 typedef struct type_path_t type_path_t;
3485 struct type_path_t {
3486         type_path_entry_t *path;
3487         type_t            *top_type;
3488         bool               invalid;
3489 };
3490
3491 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3492 {
3493         size_t len = ARR_LEN(path->path);
3494
3495         for (size_t i = 0; i < len; ++i) {
3496                 const type_path_entry_t *entry = & path->path[i];
3497
3498                 type_t *type = skip_typeref(entry->type);
3499                 if (is_type_compound(type)) {
3500                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3501                 } else if (is_type_array(type)) {
3502                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3503                 } else {
3504                         fprintf(stderr, "-INVALID-");
3505                 }
3506         }
3507         fprintf(stderr, "  (");
3508         print_type(path->top_type);
3509         fprintf(stderr, ")");
3510 }
3511
3512 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3513 {
3514         size_t len = ARR_LEN(path->path);
3515         assert(len > 0);
3516         return & path->path[len-1];
3517 }
3518
3519 static type_path_entry_t *append_to_type_path(type_path_t *path)
3520 {
3521         size_t len = ARR_LEN(path->path);
3522         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3523
3524         type_path_entry_t *result = & path->path[len];
3525         memset(result, 0, sizeof(result[0]));
3526         return result;
3527 }
3528
3529 static size_t get_compound_member_count(const compound_type_t *type)
3530 {
3531         compound_t *compound  = type->compound;
3532         size_t      n_members = 0;
3533         entity_t   *member    = compound->members.entities;
3534         for ( ; member != NULL; member = member->base.next) {
3535                 ++n_members;
3536         }
3537
3538         return n_members;
3539 }
3540
3541 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3542 {
3543         type_t *orig_top_type = path->top_type;
3544         type_t *top_type      = skip_typeref(orig_top_type);
3545
3546         assert(is_type_compound(top_type) || is_type_array(top_type));
3547
3548         if (ARR_LEN(path->path) == 0) {
3549                 return NULL;
3550         } else {
3551                 type_path_entry_t *top         = get_type_path_top(path);
3552                 ir_initializer_t  *initializer = top->initializer;
3553                 return get_initializer_compound_value(initializer, top->index);
3554         }
3555 }
3556
3557 static void descend_into_subtype(type_path_t *path)
3558 {
3559         type_t *orig_top_type = path->top_type;
3560         type_t *top_type      = skip_typeref(orig_top_type);
3561
3562         assert(is_type_compound(top_type) || is_type_array(top_type));
3563
3564         ir_initializer_t *initializer = get_initializer_entry(path);
3565
3566         type_path_entry_t *top = append_to_type_path(path);
3567         top->type              = top_type;
3568
3569         size_t len;
3570
3571         if (is_type_compound(top_type)) {
3572                 compound_t *compound = top_type->compound.compound;
3573                 entity_t   *entry    = compound->members.entities;
3574
3575                 top->compound_entry = entry;
3576                 top->index          = 0;
3577                 len                 = get_compound_member_count(&top_type->compound);
3578                 if (entry != NULL) {
3579                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3580                         path->top_type = entry->declaration.type;
3581                 }
3582         } else {
3583                 assert(is_type_array(top_type));
3584                 assert(top_type->array.size > 0);
3585
3586                 top->index     = 0;
3587                 path->top_type = top_type->array.element_type;
3588                 len            = top_type->array.size;
3589         }
3590         if (initializer == NULL
3591                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3592                 initializer = create_initializer_compound(len);
3593                 /* we have to set the entry at the 2nd latest path entry... */
3594                 size_t path_len = ARR_LEN(path->path);
3595                 assert(path_len >= 1);
3596                 if (path_len > 1) {
3597                         type_path_entry_t *entry        = & path->path[path_len-2];
3598                         ir_initializer_t  *tinitializer = entry->initializer;
3599                         set_initializer_compound_value(tinitializer, entry->index,
3600                                                        initializer);
3601                 }
3602         }
3603         top->initializer = initializer;
3604 }
3605
3606 static void ascend_from_subtype(type_path_t *path)
3607 {
3608         type_path_entry_t *top = get_type_path_top(path);
3609
3610         path->top_type = top->type;
3611
3612         size_t len = ARR_LEN(path->path);
3613         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3614 }
3615
3616 static void walk_designator(type_path_t *path, const designator_t *designator)
3617 {
3618         /* designators start at current object type */
3619         ARR_RESIZE(type_path_entry_t, path->path, 1);
3620
3621         for ( ; designator != NULL; designator = designator->next) {
3622                 type_path_entry_t *top         = get_type_path_top(path);
3623                 type_t            *orig_type   = top->type;
3624                 type_t            *type        = skip_typeref(orig_type);
3625
3626                 if (designator->symbol != NULL) {
3627                         assert(is_type_compound(type));
3628                         size_t    index  = 0;
3629                         symbol_t *symbol = designator->symbol;
3630
3631                         compound_t *compound = type->compound.compound;
3632                         entity_t   *iter     = compound->members.entities;
3633                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3634                                 if (iter->base.symbol == symbol) {
3635                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3636                                         break;
3637                                 }
3638                         }
3639                         assert(iter != NULL);
3640
3641                         top->type           = orig_type;
3642                         top->compound_entry = iter;
3643                         top->index          = index;
3644                         orig_type           = iter->declaration.type;
3645                 } else {
3646                         expression_t *array_index = designator->array_index;
3647                         assert(designator->array_index != NULL);
3648                         assert(is_type_array(type));
3649
3650                         long index = fold_constant(array_index);
3651                         assert(index >= 0);
3652 #ifndef NDEBUG
3653                         if (type->array.size_constant) {
3654                                 long array_size = type->array.size;
3655                                 assert(index < array_size);
3656                         }
3657 #endif
3658
3659                         top->type  = orig_type;
3660                         top->index = (size_t) index;
3661                         orig_type  = type->array.element_type;
3662                 }
3663                 path->top_type = orig_type;
3664
3665                 if (designator->next != NULL) {
3666                         descend_into_subtype(path);
3667                 }
3668         }
3669
3670         path->invalid  = false;
3671 }
3672
3673 static void advance_current_object(type_path_t *path)
3674 {
3675         if (path->invalid) {
3676                 /* TODO: handle this... */
3677                 panic("invalid initializer in ast2firm (excessive elements)");
3678         }
3679
3680         type_path_entry_t *top = get_type_path_top(path);
3681
3682         type_t *type = skip_typeref(top->type);
3683         if (is_type_union(type)) {
3684                 top->compound_entry = NULL;
3685         } else if (is_type_struct(type)) {
3686                 entity_t *entry = top->compound_entry;
3687
3688                 top->index++;
3689                 entry               = entry->base.next;
3690                 top->compound_entry = entry;
3691                 if (entry != NULL) {
3692                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3693                         path->top_type = entry->declaration.type;
3694                         return;
3695                 }
3696         } else {
3697                 assert(is_type_array(type));
3698
3699                 top->index++;
3700                 if (!type->array.size_constant || top->index < type->array.size) {
3701                         return;
3702                 }
3703         }
3704
3705         /* we're past the last member of the current sub-aggregate, try if we
3706          * can ascend in the type hierarchy and continue with another subobject */
3707         size_t len = ARR_LEN(path->path);
3708
3709         if (len > 1) {
3710                 ascend_from_subtype(path);
3711                 advance_current_object(path);
3712         } else {
3713                 path->invalid = true;
3714         }
3715 }
3716
3717
3718 static ir_initializer_t *create_ir_initializer(
3719                 const initializer_t *initializer, type_t *type);
3720
3721 static ir_initializer_t *create_ir_initializer_value(
3722                 const initializer_value_t *initializer)
3723 {
3724         if (is_type_compound(initializer->value->base.type)) {
3725                 panic("initializer creation for compounds not implemented yet");
3726         }
3727         ir_node *value = expression_to_firm(initializer->value);
3728         type_t  *type  = initializer->value->base.type;
3729         ir_mode *mode  = get_ir_mode_storage(type);
3730         value          = create_conv(NULL, value, mode);
3731         return create_initializer_const(value);
3732 }
3733
3734 /** test wether type can be initialized by a string constant */
3735 static bool is_string_type(type_t *type)
3736 {
3737         type_t *inner;
3738         if (is_type_pointer(type)) {
3739                 inner = skip_typeref(type->pointer.points_to);
3740         } else if(is_type_array(type)) {
3741                 inner = skip_typeref(type->array.element_type);
3742         } else {
3743                 return false;
3744         }
3745
3746         return is_type_integer(inner);
3747 }
3748
3749 static ir_initializer_t *create_ir_initializer_list(
3750                 const initializer_list_t *initializer, type_t *type)
3751 {
3752         type_path_t path;
3753         memset(&path, 0, sizeof(path));
3754         path.top_type = type;
3755         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3756
3757         descend_into_subtype(&path);
3758
3759         for (size_t i = 0; i < initializer->len; ++i) {
3760                 const initializer_t *sub_initializer = initializer->initializers[i];
3761
3762                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3763                         walk_designator(&path, sub_initializer->designator.designator);
3764                         continue;
3765                 }
3766
3767                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3768                         /* we might have to descend into types until we're at a scalar
3769                          * type */
3770                         while(true) {
3771                                 type_t *orig_top_type = path.top_type;
3772                                 type_t *top_type      = skip_typeref(orig_top_type);
3773
3774                                 if (is_type_scalar(top_type))
3775                                         break;
3776                                 descend_into_subtype(&path);
3777                         }
3778                 } else if (sub_initializer->kind == INITIALIZER_STRING
3779                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3780                         /* we might have to descend into types until we're at a scalar
3781                          * type */
3782                         while (true) {
3783                                 type_t *orig_top_type = path.top_type;
3784                                 type_t *top_type      = skip_typeref(orig_top_type);
3785
3786                                 if (is_string_type(top_type))
3787                                         break;
3788                                 descend_into_subtype(&path);
3789                         }
3790                 }
3791
3792                 ir_initializer_t *sub_irinitializer
3793                         = create_ir_initializer(sub_initializer, path.top_type);
3794
3795                 size_t path_len = ARR_LEN(path.path);
3796                 assert(path_len >= 1);
3797                 type_path_entry_t *entry        = & path.path[path_len-1];
3798                 ir_initializer_t  *tinitializer = entry->initializer;
3799                 set_initializer_compound_value(tinitializer, entry->index,
3800                                                sub_irinitializer);
3801
3802                 advance_current_object(&path);
3803         }
3804
3805         assert(ARR_LEN(path.path) >= 1);
3806         ir_initializer_t *result = path.path[0].initializer;
3807         DEL_ARR_F(path.path);
3808
3809         return result;
3810 }
3811
3812 static ir_initializer_t *create_ir_initializer_string(
3813                 const initializer_string_t *initializer, type_t *type)
3814 {
3815         type = skip_typeref(type);
3816
3817         size_t            string_len    = initializer->string.size;
3818         assert(type->kind == TYPE_ARRAY);
3819         assert(type->array.size_constant);
3820         size_t            len           = type->array.size;
3821         ir_initializer_t *irinitializer = create_initializer_compound(len);
3822
3823         const char *string = initializer->string.begin;
3824         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3825
3826         for (size_t i = 0; i < len; ++i) {
3827                 char c = 0;
3828                 if (i < string_len)
3829                         c = string[i];
3830
3831                 tarval           *tv = new_tarval_from_long(c, mode);
3832                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3833
3834                 set_initializer_compound_value(irinitializer, i, char_initializer);
3835         }
3836
3837         return irinitializer;
3838 }
3839
3840 static ir_initializer_t *create_ir_initializer_wide_string(
3841                 const initializer_wide_string_t *initializer, type_t *type)
3842 {
3843         size_t            string_len    = initializer->string.size;
3844         assert(type->kind == TYPE_ARRAY);
3845         assert(type->array.size_constant);
3846         size_t            len           = type->array.size;
3847         ir_initializer_t *irinitializer = create_initializer_compound(len);
3848
3849         const wchar_rep_t *string = initializer->string.begin;
3850         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3851
3852         for (size_t i = 0; i < len; ++i) {
3853                 wchar_rep_t c = 0;
3854                 if (i < string_len) {
3855                         c = string[i];
3856                 }
3857                 tarval *tv = new_tarval_from_long(c, mode);
3858                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3859
3860                 set_initializer_compound_value(irinitializer, i, char_initializer);
3861         }
3862
3863         return irinitializer;
3864 }
3865
3866 static ir_initializer_t *create_ir_initializer(
3867                 const initializer_t *initializer, type_t *type)
3868 {
3869         switch(initializer->kind) {
3870                 case INITIALIZER_STRING:
3871                         return create_ir_initializer_string(&initializer->string, type);
3872
3873                 case INITIALIZER_WIDE_STRING:
3874                         return create_ir_initializer_wide_string(&initializer->wide_string,
3875                                                                  type);
3876
3877                 case INITIALIZER_LIST:
3878                         return create_ir_initializer_list(&initializer->list, type);
3879
3880                 case INITIALIZER_VALUE:
3881                         return create_ir_initializer_value(&initializer->value);
3882
3883                 case INITIALIZER_DESIGNATOR:
3884                         panic("unexpected designator initializer found");
3885         }
3886         panic("unknown initializer");
3887 }
3888
3889 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3890                 ir_node *base_addr)
3891 {
3892         if (is_atomic_type(type)) {
3893                 ir_mode *mode = get_type_mode(type);
3894                 tarval  *zero = get_mode_null(mode);
3895                 ir_node *cnst = new_d_Const(dbgi, zero);
3896
3897                 /* TODO: bitfields */
3898                 ir_node *mem    = get_store();
3899                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3900                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3901                 set_store(proj_m);
3902         } else {
3903                 assert(is_compound_type(type));
3904
3905                 int n_members;
3906                 if (is_Array_type(type)) {
3907                         assert(has_array_upper_bound(type, 0));
3908                         n_members = get_array_upper_bound_int(type, 0);
3909                 } else {
3910                         n_members = get_compound_n_members(type);
3911                 }
3912
3913                 for (int i = 0; i < n_members; ++i) {
3914                         ir_node *addr;
3915                         ir_type *irtype;
3916                         if (is_Array_type(type)) {
3917                                 ir_entity *entity   = get_array_element_entity(type);
3918                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3919                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3920                                 ir_node   *in[1]    = { cnst };
3921                                 irtype = get_array_element_type(type);
3922                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3923                         } else {
3924                                 ir_entity *member = get_compound_member(type, i);
3925
3926                                 irtype = get_entity_type(member);
3927                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3928                         }
3929
3930                         create_dynamic_null_initializer(irtype, dbgi, addr);
3931                 }
3932         }
3933 }
3934
3935 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3936                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3937 {
3938         switch(get_initializer_kind(initializer)) {
3939         case IR_INITIALIZER_NULL: {
3940                 create_dynamic_null_initializer(type, dbgi, base_addr);
3941                 return;
3942         }
3943         case IR_INITIALIZER_CONST: {
3944                 ir_node *node     = get_initializer_const_value(initializer);
3945                 ir_mode *mode     = get_irn_mode(node);
3946                 ir_type *ent_type = get_entity_type(entity);
3947
3948                 /* is it a bitfield type? */
3949                 if (is_Primitive_type(ent_type) &&
3950                                 get_primitive_base_type(ent_type) != NULL) {
3951                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3952                         return;
3953                 }
3954
3955                 assert(get_type_mode(type) == mode);
3956                 ir_node *mem    = get_store();
3957                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, 0);
3958                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3959                 set_store(proj_m);
3960                 return;
3961         }
3962         case IR_INITIALIZER_TARVAL: {
3963                 tarval  *tv       = get_initializer_tarval_value(initializer);
3964                 ir_mode *mode     = get_tarval_mode(tv);
3965                 ir_node *cnst     = new_d_Const(dbgi, tv);
3966                 ir_type *ent_type = get_entity_type(entity);
3967
3968                 /* is it a bitfield type? */
3969                 if (is_Primitive_type(ent_type) &&
3970                                 get_primitive_base_type(ent_type) != NULL) {
3971                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3972                         return;
3973                 }
3974
3975                 assert(get_type_mode(type) == mode);
3976                 ir_node *mem    = get_store();
3977                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3978                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3979                 set_store(proj_m);
3980                 return;
3981         }
3982         case IR_INITIALIZER_COMPOUND: {
3983                 assert(is_compound_type(type));
3984                 int n_members;
3985                 if (is_Array_type(type)) {
3986                         assert(has_array_upper_bound(type, 0));
3987                         n_members = get_array_upper_bound_int(type, 0);
3988                 } else {
3989                         n_members = get_compound_n_members(type);
3990                 }
3991
3992                 if (get_initializer_compound_n_entries(initializer)
3993                                 != (unsigned) n_members)
3994                         panic("initializer doesn't match compound type");
3995
3996                 for (int i = 0; i < n_members; ++i) {
3997                         ir_node   *addr;
3998                         ir_type   *irtype;
3999                         ir_entity *sub_entity;
4000                         if (is_Array_type(type)) {
4001                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4002                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4003                                 ir_node   *in[1]    = { cnst };
4004                                 irtype     = get_array_element_type(type);
4005                                 sub_entity = get_array_element_entity(type);
4006                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4007                                                        sub_entity);
4008                         } else {
4009                                 sub_entity = get_compound_member(type, i);
4010                                 irtype     = get_entity_type(sub_entity);
4011                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4012                                                              sub_entity);
4013                         }
4014
4015                         ir_initializer_t *sub_init
4016                                 = get_initializer_compound_value(initializer, i);
4017
4018                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4019                                                        addr);
4020                 }
4021                 return;
4022         }
4023         }
4024
4025         panic("invalid IR_INITIALIZER found");
4026 }
4027
4028 static void create_dynamic_initializer(ir_initializer_t *initializer,
4029                 dbg_info *dbgi, ir_entity *entity)
4030 {
4031         ir_node *frame     = get_local_frame(entity);
4032         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4033         ir_type *type      = get_entity_type(entity);
4034
4035         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4036 }
4037
4038 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4039                                      ir_entity *entity, type_t *type)
4040 {
4041         ir_node *memory = get_store();
4042         ir_node *nomem  = new_NoMem();
4043         ir_node *frame  = get_irg_frame(current_ir_graph);
4044         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4045
4046         if (initializer->kind == INITIALIZER_VALUE) {
4047                 initializer_value_t *initializer_value = &initializer->value;
4048
4049                 ir_node *value = expression_to_firm(initializer_value->value);
4050                 type = skip_typeref(type);
4051                 assign_value(dbgi, addr, type, value);
4052                 return;
4053         }
4054
4055         if (!is_constant_initializer(initializer)) {
4056                 ir_initializer_t *irinitializer
4057                         = create_ir_initializer(initializer, type);
4058
4059                 create_dynamic_initializer(irinitializer, dbgi, entity);
4060                 return;
4061         }
4062
4063         /* create the ir_initializer */
4064         ir_graph *const old_current_ir_graph = current_ir_graph;
4065         current_ir_graph = get_const_code_irg();
4066
4067         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4068
4069         assert(current_ir_graph == get_const_code_irg());
4070         current_ir_graph = old_current_ir_graph;
4071
4072         /* create a "template" entity which is copied to the entity on the stack */
4073         ident     *const id          = id_unique("initializer.%u");
4074         ir_type   *const irtype      = get_ir_type(type);
4075         ir_type   *const global_type = get_glob_type();
4076         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4077         set_entity_ld_ident(init_entity, id);
4078
4079         set_entity_variability(init_entity, variability_initialized);
4080         set_entity_visibility(init_entity, visibility_local);
4081         set_entity_allocation(init_entity, allocation_static);
4082
4083         set_entity_initializer(init_entity, irinitializer);
4084
4085         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4086         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4087
4088         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4089         set_store(copyb_mem);
4090 }
4091
4092 static void create_initializer_local_variable_entity(entity_t *entity)
4093 {
4094         assert(entity->kind == ENTITY_VARIABLE);
4095         initializer_t *initializer = entity->variable.initializer;
4096         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4097         ir_entity     *irentity    = entity->variable.v.entity;
4098         type_t        *type        = entity->declaration.type;
4099
4100         type = get_aligned_type(type, entity->variable.alignment);
4101         create_local_initializer(initializer, dbgi, irentity, type);
4102 }
4103
4104 static void create_variable_initializer(entity_t *entity)
4105 {
4106         assert(entity->kind == ENTITY_VARIABLE);
4107         initializer_t *initializer = entity->variable.initializer;
4108         if (initializer == NULL)
4109                 return;
4110
4111         declaration_kind_t declaration_kind
4112                 = (declaration_kind_t) entity->declaration.kind;
4113         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4114                 create_initializer_local_variable_entity(entity);
4115                 return;
4116         }
4117
4118         type_t            *type = entity->declaration.type;
4119         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4120
4121         if (initializer->kind == INITIALIZER_VALUE) {
4122                 initializer_value_t *initializer_value = &initializer->value;
4123                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4124
4125                 ir_node *value = expression_to_firm(initializer_value->value);
4126
4127                 type_t  *type = initializer_value->value->base.type;
4128                 ir_mode *mode = get_ir_mode_storage(type);
4129                 value = create_conv(dbgi, value, mode);
4130                 value = do_strict_conv(dbgi, value);
4131
4132                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4133                         set_value(entity->variable.v.value_number, value);
4134                 } else {
4135                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4136
4137                         ir_entity *irentity = entity->variable.v.entity;
4138
4139                         if (tq & TYPE_QUALIFIER_CONST) {
4140                                 set_entity_variability(irentity, variability_constant);
4141                         } else {
4142                                 set_entity_variability(irentity, variability_initialized);
4143                         }
4144                         set_atomic_ent_value(irentity, value);
4145                 }
4146         } else {
4147                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4148                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4149
4150                 ir_entity        *irentity        = entity->variable.v.entity;
4151                 ir_initializer_t *irinitializer
4152                         = create_ir_initializer(initializer, type);
4153
4154                 if (tq & TYPE_QUALIFIER_CONST) {
4155                         set_entity_variability(irentity, variability_constant);
4156                 } else {
4157                         set_entity_variability(irentity, variability_initialized);
4158                 }
4159                 set_entity_initializer(irentity, irinitializer);
4160         }
4161 }
4162
4163 static void create_variable_length_array(entity_t *entity)
4164 {
4165         assert(entity->kind == ENTITY_VARIABLE);
4166         assert(entity->variable.initializer == NULL);
4167
4168         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4169         entity->variable.v.vla_base = NULL;
4170
4171         /* TODO: record VLA somewhere so we create the free node when we leave
4172          * it's scope */
4173 }
4174
4175 static void allocate_variable_length_array(entity_t *entity)
4176 {
4177         assert(entity->kind == ENTITY_VARIABLE);
4178         assert(entity->variable.initializer == NULL);
4179         assert(get_cur_block() != NULL);
4180
4181         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4182         type_t   *type      = entity->declaration.type;
4183         ir_type  *el_type   = get_ir_type(type->array.element_type);
4184
4185         /* make sure size_node is calculated */
4186         get_type_size(type);
4187         ir_node  *elems = type->array.size_node;
4188         ir_node  *mem   = get_store();
4189         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4190
4191         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4192         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4193         set_store(proj_m);
4194
4195         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4196         entity->variable.v.vla_base = addr;
4197 }
4198
4199 /**
4200  * Creates a Firm local variable from a declaration.
4201  */
4202 static void create_local_variable(entity_t *entity)
4203 {
4204         assert(entity->kind == ENTITY_VARIABLE);
4205         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4206
4207         bool needs_entity = entity->variable.address_taken;
4208         type_t *type = skip_typeref(entity->declaration.type);
4209
4210         /* is it a variable length array? */
4211         if (is_type_array(type) && !type->array.size_constant) {
4212                 create_variable_length_array(entity);
4213                 return;
4214         } else if (is_type_array(type) || is_type_compound(type)) {
4215                 needs_entity = true;
4216         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4217                 needs_entity = true;
4218         }
4219
4220         if (needs_entity) {
4221                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4222                 create_variable_entity(entity,
4223                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4224                                        frame_type);
4225         } else {
4226                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4227                 entity->variable.v.value_number = next_value_number_function;
4228                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4229                                         entity);
4230                 ++next_value_number_function;
4231         }
4232 }
4233
4234 static void create_local_static_variable(entity_t *entity)
4235 {
4236         assert(entity->kind == ENTITY_VARIABLE);
4237         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4238
4239         type_t    *type = skip_typeref(entity->declaration.type);
4240         type            = get_aligned_type(type, entity->variable.alignment);
4241
4242         ir_type   *const var_type = entity->variable.thread_local ?
4243                 get_tls_type() : get_glob_type();
4244         ir_type   *const irtype   = get_ir_type(type);
4245         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4246
4247         size_t l = strlen(entity->base.symbol->string);
4248         char   buf[l + sizeof(".%u")];
4249         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4250         ident     *const id = id_unique(buf);
4251
4252         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4253
4254         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4255                 set_entity_volatility(irentity, volatility_is_volatile);
4256         }
4257
4258         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4259         entity->variable.v.entity = irentity;
4260
4261         set_entity_ld_ident(irentity, id);
4262         set_entity_variability(irentity, variability_uninitialized);
4263         set_entity_visibility(irentity, visibility_local);
4264         set_entity_allocation(irentity, entity->variable.thread_local ?
4265                 allocation_automatic : allocation_static);
4266
4267         ir_graph *const old_current_ir_graph = current_ir_graph;
4268         current_ir_graph = get_const_code_irg();
4269
4270         create_variable_initializer(entity);
4271
4272         assert(current_ir_graph == get_const_code_irg());
4273         current_ir_graph = old_current_ir_graph;
4274 }
4275
4276
4277
4278 static void return_statement_to_firm(return_statement_t *statement)
4279 {
4280         if (get_cur_block() == NULL)
4281                 return;
4282
4283         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4284         type_t   *type        = current_function_entity->declaration.type;
4285         ir_type  *func_irtype = get_ir_type(type);
4286
4287
4288         ir_node *in[1];
4289         int      in_len;
4290         if (get_method_n_ress(func_irtype) > 0) {
4291                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4292
4293                 if (statement->value != NULL) {
4294                         ir_node *node = expression_to_firm(statement->value);
4295                         if (!is_compound_type(res_type)) {
4296                                 type_t  *type = statement->value->base.type;
4297                                 ir_mode *mode = get_ir_mode_storage(type);
4298                                 node          = create_conv(dbgi, node, mode);
4299                                 node          = do_strict_conv(dbgi, node);
4300                         }
4301                         in[0] = node;
4302                 } else {
4303                         ir_mode *mode;
4304                         if (is_compound_type(res_type)) {
4305                                 mode = mode_P_data;
4306                         } else {
4307                                 mode = get_type_mode(res_type);
4308                         }
4309                         in[0] = new_Unknown(mode);
4310                 }
4311                 in_len = 1;
4312         } else {
4313                 /* build return_value for its side effects */
4314                 if (statement->value != NULL) {
4315                         expression_to_firm(statement->value);
4316                 }
4317                 in_len = 0;
4318         }
4319
4320         ir_node  *store = get_store();
4321         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4322
4323         ir_node *end_block = get_irg_end_block(current_ir_graph);
4324         add_immBlock_pred(end_block, ret);
4325
4326         set_cur_block(NULL);
4327 }
4328
4329 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4330 {
4331         if (get_cur_block() == NULL)
4332                 return NULL;
4333
4334         return expression_to_firm(statement->expression);
4335 }
4336
4337 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4338 {
4339         entity_t *entity = compound->scope.entities;
4340         for ( ; entity != NULL; entity = entity->base.next) {
4341                 if (!is_declaration(entity))
4342                         continue;
4343
4344                 create_local_declaration(entity);
4345         }
4346
4347         ir_node     *result    = NULL;
4348         statement_t *statement = compound->statements;
4349         for ( ; statement != NULL; statement = statement->base.next) {
4350                 if (statement->base.next == NULL
4351                                 && statement->kind == STATEMENT_EXPRESSION) {
4352                         result = expression_statement_to_firm(
4353                                         &statement->expression);
4354                         break;
4355                 }
4356                 statement_to_firm(statement);
4357         }
4358
4359         return result;
4360 }
4361
4362 static void create_global_variable(entity_t *entity)
4363 {
4364         assert(entity->kind == ENTITY_VARIABLE);
4365
4366         ir_visibility vis;
4367         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4368                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4369                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4370                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4371
4372                 default: panic("Invalid storage class for global variable");
4373         }
4374
4375         ir_type *var_type = entity->variable.thread_local ?
4376                 get_tls_type() : get_glob_type();
4377         create_variable_entity(entity,
4378                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4379         set_entity_visibility(entity->variable.v.entity, vis);
4380 }
4381
4382 static void create_local_declaration(entity_t *entity)
4383 {
4384         assert(is_declaration(entity));
4385
4386         /* construct type */
4387         (void) get_ir_type(entity->declaration.type);
4388         if (entity->base.symbol == NULL) {
4389                 return;
4390         }
4391
4392         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4393         case STORAGE_CLASS_STATIC:
4394                 create_local_static_variable(entity);
4395                 return;
4396         case STORAGE_CLASS_EXTERN:
4397                 if (entity->kind == ENTITY_FUNCTION) {
4398                         assert(entity->function.statement == NULL);
4399                         get_function_entity(entity);
4400                 } else {
4401                         create_global_variable(entity);
4402                         create_variable_initializer(entity);
4403                 }
4404                 return;
4405         case STORAGE_CLASS_NONE:
4406         case STORAGE_CLASS_AUTO:
4407         case STORAGE_CLASS_REGISTER:
4408                 if (entity->kind == ENTITY_FUNCTION) {
4409                         if (entity->function.statement != NULL) {
4410                                 get_function_entity(entity);
4411                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4412                                 enqueue_inner_function(entity);
4413                         } else {
4414                                 get_function_entity(entity);
4415                         }
4416                 } else {
4417                         create_local_variable(entity);
4418                 }
4419                 return;
4420         case STORAGE_CLASS_TYPEDEF:
4421                 break;
4422         }
4423         panic("invalid storage class found");
4424 }
4425
4426 static void initialize_local_declaration(entity_t *entity)
4427 {
4428         if (entity->base.symbol == NULL)
4429                 return;
4430
4431         switch ((declaration_kind_t) entity->declaration.kind) {
4432         case DECLARATION_KIND_LOCAL_VARIABLE:
4433         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4434                 create_variable_initializer(entity);
4435                 return;
4436
4437         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4438                 allocate_variable_length_array(entity);
4439                 return;
4440
4441         case DECLARATION_KIND_COMPOUND_MEMBER:
4442         case DECLARATION_KIND_GLOBAL_VARIABLE:
4443         case DECLARATION_KIND_FUNCTION:
4444         case DECLARATION_KIND_INNER_FUNCTION:
4445                 return;
4446
4447         case DECLARATION_KIND_PARAMETER:
4448         case DECLARATION_KIND_PARAMETER_ENTITY:
4449                 panic("can't initialize parameters");
4450
4451         case DECLARATION_KIND_UNKNOWN:
4452                 panic("can't initialize unknown declaration");
4453         }
4454         panic("invalid declaration kind");
4455 }
4456
4457 static void declaration_statement_to_firm(declaration_statement_t *statement)
4458 {
4459         entity_t *entity = statement->declarations_begin;
4460         if (entity == NULL)
4461                 return;
4462
4463         entity_t *const last = statement->declarations_end;
4464         for ( ;; entity = entity->base.next) {
4465                 if (is_declaration(entity)) {
4466                         initialize_local_declaration(entity);
4467                 } else if (entity->kind == ENTITY_TYPEDEF) {
4468                         type_t *const type = skip_typeref(entity->typedefe.type);
4469                         if (is_type_array(type) && type->array.is_vla)
4470                                 get_vla_size(&type->array);
4471                 }
4472                 if (entity == last)
4473                         break;
4474         }
4475 }
4476
4477 static void if_statement_to_firm(if_statement_t *statement)
4478 {
4479         ir_node *cur_block = get_cur_block();
4480
4481         ir_node *fallthrough_block = NULL;
4482
4483         /* the true (blocks) */
4484         ir_node *true_block = NULL;
4485         if (statement->true_statement != NULL) {
4486                 true_block = new_immBlock();
4487                 set_cur_block(true_block);
4488                 statement_to_firm(statement->true_statement);
4489                 if (get_cur_block() != NULL) {
4490                         ir_node *jmp = new_Jmp();
4491                         if (fallthrough_block == NULL)
4492                                 fallthrough_block = new_immBlock();
4493                         add_immBlock_pred(fallthrough_block, jmp);
4494                 }
4495         }
4496
4497         /* the false (blocks) */
4498         ir_node *false_block = NULL;
4499         if (statement->false_statement != NULL) {
4500                 false_block = new_immBlock();
4501                 set_cur_block(false_block);
4502
4503                 statement_to_firm(statement->false_statement);
4504                 if (get_cur_block() != NULL) {
4505                         ir_node *jmp = new_Jmp();
4506                         if (fallthrough_block == NULL)
4507                                 fallthrough_block = new_immBlock();
4508                         add_immBlock_pred(fallthrough_block, jmp);
4509                 }
4510         }
4511
4512         /* create the condition */
4513         if (cur_block != NULL) {
4514                 if (true_block == NULL || false_block == NULL) {
4515                         if (fallthrough_block == NULL)
4516                                 fallthrough_block = new_immBlock();
4517                         if (true_block == NULL)
4518                                 true_block = fallthrough_block;
4519                         if (false_block == NULL)
4520                                 false_block = fallthrough_block;
4521                 }
4522
4523                 set_cur_block(cur_block);
4524                 create_condition_evaluation(statement->condition, true_block,
4525                                             false_block);
4526         }
4527
4528         mature_immBlock(true_block);
4529         if (false_block != fallthrough_block && false_block != NULL) {
4530                 mature_immBlock(false_block);
4531         }
4532         if (fallthrough_block != NULL) {
4533                 mature_immBlock(fallthrough_block);
4534         }
4535
4536         set_cur_block(fallthrough_block);
4537 }
4538
4539 static void while_statement_to_firm(while_statement_t *statement)
4540 {
4541         ir_node *jmp = NULL;
4542         if (get_cur_block() != NULL) {
4543                 jmp = new_Jmp();
4544         }
4545
4546         /* create the header block */
4547         ir_node *header_block = new_immBlock();
4548         if (jmp != NULL) {
4549                 add_immBlock_pred(header_block, jmp);
4550         }
4551
4552         /* the loop body */
4553         ir_node *old_continue_label = continue_label;
4554         ir_node *old_break_label    = break_label;
4555         continue_label              = header_block;
4556         break_label                 = NULL;
4557
4558         ir_node *body_block = new_immBlock();
4559         set_cur_block(body_block);
4560         statement_to_firm(statement->body);
4561         ir_node *false_block = break_label;
4562
4563         assert(continue_label == header_block);
4564         continue_label = old_continue_label;
4565         break_label    = old_break_label;
4566
4567         if (get_cur_block() != NULL) {
4568                 jmp = new_Jmp();
4569                 add_immBlock_pred(header_block, jmp);
4570         }
4571
4572         /* shortcut for while(true) */
4573         if (is_constant_expression(statement->condition)
4574                         && fold_constant(statement->condition) != 0) {
4575                 set_cur_block(header_block);
4576                 ir_node *header_jmp = new_Jmp();
4577                 add_immBlock_pred(body_block, header_jmp);
4578
4579                 keep_alive(body_block);
4580                 keep_all_memory(body_block);
4581                 set_cur_block(body_block);
4582         } else {
4583                 if (false_block == NULL) {
4584                         false_block = new_immBlock();
4585                 }
4586
4587                 /* create the condition */
4588                 set_cur_block(header_block);
4589
4590                 create_condition_evaluation(statement->condition, body_block,
4591                                             false_block);
4592         }
4593
4594         mature_immBlock(body_block);
4595         mature_immBlock(header_block);
4596         if (false_block != NULL) {
4597                 mature_immBlock(false_block);
4598         }
4599
4600         set_cur_block(false_block);
4601 }
4602
4603 static void do_while_statement_to_firm(do_while_statement_t *statement)
4604 {
4605         ir_node *jmp = NULL;
4606         if (get_cur_block() != NULL) {
4607                 jmp = new_Jmp();
4608         }
4609
4610         /* create the header block */
4611         ir_node *header_block = new_immBlock();
4612
4613         /* the loop body */
4614         ir_node *body_block = new_immBlock();
4615         if (jmp != NULL) {
4616                 add_immBlock_pred(body_block, jmp);
4617         }
4618
4619         ir_node *old_continue_label = continue_label;
4620         ir_node *old_break_label    = break_label;
4621         continue_label              = header_block;
4622         break_label                 = NULL;
4623
4624         set_cur_block(body_block);
4625         statement_to_firm(statement->body);
4626         ir_node *false_block = break_label;
4627
4628         assert(continue_label == header_block);
4629         continue_label = old_continue_label;
4630         break_label    = old_break_label;
4631
4632         if (get_cur_block() != NULL) {
4633                 ir_node *body_jmp = new_Jmp();
4634                 add_immBlock_pred(header_block, body_jmp);
4635                 mature_immBlock(header_block);
4636         }
4637
4638         if (false_block == NULL) {
4639                 false_block = new_immBlock();
4640         }
4641
4642         /* create the condition */
4643         set_cur_block(header_block);
4644
4645         create_condition_evaluation(statement->condition, body_block, false_block);
4646         mature_immBlock(body_block);
4647         mature_immBlock(header_block);
4648         mature_immBlock(false_block);
4649
4650         set_cur_block(false_block);
4651 }
4652
4653 static void for_statement_to_firm(for_statement_t *statement)
4654 {
4655         ir_node *jmp = NULL;
4656
4657         /* create declarations */
4658         entity_t *entity = statement->scope.entities;
4659         for ( ; entity != NULL; entity = entity->base.next) {
4660                 if (!is_declaration(entity))
4661                         continue;
4662
4663                 create_local_declaration(entity);
4664         }
4665
4666         if (get_cur_block() != NULL) {
4667                 entity = statement->scope.entities;
4668                 for ( ; entity != NULL; entity = entity->base.next) {
4669                         if (!is_declaration(entity))
4670                                 continue;
4671
4672                         initialize_local_declaration(entity);
4673                 }
4674
4675                 if (statement->initialisation != NULL) {
4676                         expression_to_firm(statement->initialisation);
4677                 }
4678
4679                 jmp = new_Jmp();
4680         }
4681
4682
4683         /* create the step block */
4684         ir_node *const step_block = new_immBlock();
4685         set_cur_block(step_block);
4686         if (statement->step != NULL) {
4687                 expression_to_firm(statement->step);
4688         }
4689         ir_node *const step_jmp = new_Jmp();
4690
4691         /* create the header block */
4692         ir_node *const header_block = new_immBlock();
4693         set_cur_block(header_block);
4694         if (jmp != NULL) {
4695                 add_immBlock_pred(header_block, jmp);
4696         }
4697         add_immBlock_pred(header_block, step_jmp);
4698
4699         /* the false block */
4700         ir_node *const false_block = new_immBlock();
4701
4702         /* the loop body */
4703         ir_node *body_block;
4704         if (statement->body != NULL) {
4705                 ir_node *const old_continue_label = continue_label;
4706                 ir_node *const old_break_label    = break_label;
4707                 continue_label = step_block;
4708                 break_label    = false_block;
4709
4710                 body_block = new_immBlock();
4711                 set_cur_block(body_block);
4712                 statement_to_firm(statement->body);
4713
4714                 assert(continue_label == step_block);
4715                 assert(break_label    == false_block);
4716                 continue_label = old_continue_label;
4717                 break_label    = old_break_label;
4718
4719                 if (get_cur_block() != NULL) {
4720                         jmp = new_Jmp();
4721                         add_immBlock_pred(step_block, jmp);
4722                 }
4723         } else {
4724                 body_block = step_block;
4725         }
4726
4727         /* create the condition */
4728         set_cur_block(header_block);
4729         if (statement->condition != NULL) {
4730                 create_condition_evaluation(statement->condition, body_block,
4731                                             false_block);
4732         } else {
4733                 keep_alive(header_block);
4734                 keep_all_memory(header_block);
4735                 jmp = new_Jmp();
4736                 add_immBlock_pred(body_block, jmp);
4737         }
4738
4739         mature_immBlock(body_block);
4740         mature_immBlock(false_block);
4741         mature_immBlock(step_block);
4742         mature_immBlock(header_block);
4743         mature_immBlock(false_block);
4744
4745         set_cur_block(false_block);
4746 }
4747
4748 static void create_jump_statement(const statement_t *statement,
4749                                   ir_node *target_block)
4750 {
4751         if (get_cur_block() == NULL)
4752                 return;
4753
4754         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4755         ir_node  *jump = new_d_Jmp(dbgi);
4756         add_immBlock_pred(target_block, jump);
4757
4758         set_cur_block(NULL);
4759 }
4760
4761 static ir_node *get_break_label(void)
4762 {
4763         if (break_label == NULL) {
4764                 break_label = new_immBlock();
4765         }
4766         return break_label;
4767 }
4768
4769 static void switch_statement_to_firm(switch_statement_t *statement)
4770 {
4771         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4772
4773         ir_node *expression  = expression_to_firm(statement->expression);
4774         ir_node *cond        = new_d_Cond(dbgi, expression);
4775
4776         set_cur_block(NULL);
4777
4778         ir_node *const old_switch_cond       = current_switch_cond;
4779         ir_node *const old_break_label       = break_label;
4780         const bool     old_saw_default_label = saw_default_label;
4781         saw_default_label                    = false;
4782         current_switch_cond                  = cond;
4783         break_label                          = NULL;
4784         switch_statement_t *const old_switch = current_switch;
4785         current_switch                       = statement;
4786
4787         /* determine a free number for the default label */
4788         unsigned long num_cases = 0;
4789         long def_nr = 0;
4790         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4791                 if (l->expression == NULL) {
4792                         /* default case */
4793                         continue;
4794                 }
4795                 if (l->last_case >= l->first_case)
4796                         num_cases += l->last_case - l->first_case + 1;
4797                 if (l->last_case > def_nr)
4798                         def_nr = l->last_case;
4799         }
4800
4801         if (def_nr == INT_MAX) {
4802                 /* Bad: an overflow will occurr, we cannot be sure that the
4803                  * maximum + 1 is a free number. Scan the values a second
4804                  * time to find a free number.
4805                  */
4806                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4807
4808                 memset(bits, 0, (num_cases + 7) >> 3);
4809                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4810                         if (l->expression == NULL) {
4811                                 /* default case */
4812                                 continue;
4813                         }
4814                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4815                         if (start < num_cases && l->last_case >= 0) {
4816                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4817                                         (unsigned long)l->last_case : num_cases - 1;
4818                                 for (unsigned long cns = start; cns <= end; ++cns) {
4819                                         bits[cns >> 3] |= (1 << (cns & 7));
4820                                 }
4821                         }
4822                 }
4823                 /* We look at the first num_cases constants:
4824                  * Either they are densed, so we took the last (num_cases)
4825                  * one, or they are non densed, so we will find one free
4826                  * there...
4827                  */
4828                 unsigned long i;
4829                 for (i = 0; i < num_cases; ++i)
4830                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4831                                 break;
4832
4833                 free(bits);
4834                 def_nr = i;
4835         } else {
4836                 ++def_nr;
4837         }
4838         statement->default_proj_nr = def_nr;
4839
4840         if (statement->body != NULL) {
4841                 statement_to_firm(statement->body);
4842         }
4843
4844         if (get_cur_block() != NULL) {
4845                 ir_node *jmp = new_Jmp();
4846                 add_immBlock_pred(get_break_label(), jmp);
4847         }
4848
4849         if (!saw_default_label) {
4850                 set_cur_block(get_nodes_block(cond));
4851                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4852                                                         statement->default_proj_nr);
4853                 add_immBlock_pred(get_break_label(), proj);
4854         }
4855
4856         if (break_label != NULL) {
4857                 mature_immBlock(break_label);
4858         }
4859         set_cur_block(break_label);
4860
4861         assert(current_switch_cond == cond);
4862         current_switch      = old_switch;
4863         current_switch_cond = old_switch_cond;
4864         break_label         = old_break_label;
4865         saw_default_label   = old_saw_default_label;
4866 }
4867
4868 static void case_label_to_firm(const case_label_statement_t *statement)
4869 {
4870         if (statement->is_empty_range)
4871                 return;
4872
4873         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4874
4875         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4876
4877         ir_node *proj;
4878         ir_node *block     = new_immBlock();
4879
4880         set_cur_block(get_nodes_block(current_switch_cond));
4881         if (statement->expression != NULL) {
4882                 long pn     = statement->first_case;
4883                 long end_pn = statement->last_case;
4884                 assert(pn <= end_pn);
4885                 /* create jumps for all cases in the given range */
4886                 do {
4887                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4888                         add_immBlock_pred(block, proj);
4889                 } while(pn++ < end_pn);
4890         } else {
4891                 saw_default_label = true;
4892                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4893                                          current_switch->default_proj_nr);
4894
4895                 add_immBlock_pred(block, proj);
4896         }
4897
4898         if (fallthrough != NULL) {
4899                 add_immBlock_pred(block, fallthrough);
4900         }
4901         mature_immBlock(block);
4902         set_cur_block(block);
4903
4904         if (statement->statement != NULL) {
4905                 statement_to_firm(statement->statement);
4906         }
4907 }
4908
4909 static void label_to_firm(const label_statement_t *statement)
4910 {
4911         ir_node *block = get_label_block(statement->label);
4912
4913         if (get_cur_block() != NULL) {
4914                 ir_node *jmp = new_Jmp();
4915                 add_immBlock_pred(block, jmp);
4916         }
4917
4918         set_cur_block(block);
4919         keep_alive(block);
4920         keep_all_memory(block);
4921
4922         if (statement->statement != NULL) {
4923                 statement_to_firm(statement->statement);
4924         }
4925 }
4926
4927 static void goto_to_firm(const goto_statement_t *statement)
4928 {
4929         if (get_cur_block() == NULL)
4930                 return;
4931
4932         if (statement->expression) {
4933                 ir_node  *irn  = expression_to_firm(statement->expression);
4934                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4935                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4936
4937                 set_irn_link(ijmp, ijmp_list);
4938                 ijmp_list = ijmp;
4939         } else {
4940                 ir_node *block = get_label_block(statement->label);
4941                 ir_node *jmp   = new_Jmp();
4942                 add_immBlock_pred(block, jmp);
4943         }
4944         set_cur_block(NULL);
4945 }
4946
4947 static void asm_statement_to_firm(const asm_statement_t *statement)
4948 {
4949         bool needs_memory = false;
4950
4951         if (statement->is_volatile) {
4952                 needs_memory = true;
4953         }
4954
4955         size_t         n_clobbers = 0;
4956         asm_clobber_t *clobber    = statement->clobbers;
4957         for ( ; clobber != NULL; clobber = clobber->next) {
4958                 const char *clobber_str = clobber->clobber.begin;
4959
4960                 if (!be_is_valid_clobber(clobber_str)) {
4961                         errorf(&statement->base.source_position,
4962                                    "invalid clobber '%s' specified", clobber->clobber);
4963                         continue;
4964                 }
4965
4966                 if (strcmp(clobber_str, "memory") == 0) {
4967                         needs_memory = true;
4968                         continue;
4969                 }
4970
4971                 ident *id = new_id_from_str(clobber_str);
4972                 obstack_ptr_grow(&asm_obst, id);
4973                 ++n_clobbers;
4974         }
4975         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4976         ident **clobbers = NULL;
4977         if (n_clobbers > 0) {
4978                 clobbers = obstack_finish(&asm_obst);
4979         }
4980
4981         size_t n_inputs  = 0;
4982         asm_argument_t *argument = statement->inputs;
4983         for ( ; argument != NULL; argument = argument->next)
4984                 n_inputs++;
4985         size_t n_outputs = 0;
4986         argument = statement->outputs;
4987         for ( ; argument != NULL; argument = argument->next)
4988                 n_outputs++;
4989
4990         unsigned next_pos = 0;
4991
4992         ir_node *ins[n_inputs + n_outputs + 1];
4993         size_t   in_size = 0;
4994
4995         ir_asm_constraint tmp_in_constraints[n_outputs];
4996
4997         const expression_t *out_exprs[n_outputs];
4998         ir_node            *out_addrs[n_outputs];
4999         size_t              out_size = 0;
5000
5001         argument = statement->outputs;
5002         for ( ; argument != NULL; argument = argument->next) {
5003                 const char *constraints = argument->constraints.begin;
5004                 asm_constraint_flags_t asm_flags
5005                         = be_parse_asm_constraints(constraints);
5006
5007                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5008                         warningf(&statement->base.source_position,
5009                                "some constraints in '%s' are not supported", constraints);
5010                 }
5011                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5012                         errorf(&statement->base.source_position,
5013                                "some constraints in '%s' are invalid", constraints);
5014                         continue;
5015                 }
5016                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5017                         errorf(&statement->base.source_position,
5018                                "no write flag specified for output constraints '%s'",
5019                                constraints);
5020                         continue;
5021                 }
5022
5023                 unsigned pos = next_pos++;
5024                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5025                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5026                         expression_t *expr = argument->expression;
5027                         ir_node      *addr = expression_to_addr(expr);
5028                         /* in+output, construct an artifical same_as constraint on the
5029                          * input */
5030                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5031                                 char     buf[64];
5032                                 ir_node *value = get_value_from_lvalue(expr, addr);
5033
5034                                 snprintf(buf, sizeof(buf), "%u", pos);
5035
5036                                 ir_asm_constraint constraint;
5037                                 constraint.pos              = pos;
5038                                 constraint.constraint       = new_id_from_str(buf);
5039                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5040                                 tmp_in_constraints[in_size] = constraint;
5041                                 ins[in_size] = value;
5042
5043                                 ++in_size;
5044                         }
5045
5046                         out_exprs[out_size] = expr;
5047                         out_addrs[out_size] = addr;
5048                         ++out_size;
5049                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5050                         /* pure memory ops need no input (but we have to make sure we
5051                          * attach to the memory) */
5052                         assert(! (asm_flags &
5053                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5054                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5055                         needs_memory = true;
5056
5057                         /* we need to attach the address to the inputs */
5058                         expression_t *expr = argument->expression;
5059
5060                         ir_asm_constraint constraint;
5061                         constraint.pos              = pos;
5062                         constraint.constraint       = new_id_from_str(constraints);
5063                         constraint.mode             = NULL;
5064                         tmp_in_constraints[in_size] = constraint;
5065
5066                         ins[in_size]          = expression_to_addr(expr);
5067                         ++in_size;
5068                         continue;
5069                 } else {
5070                         errorf(&statement->base.source_position,
5071                                "only modifiers but no place set in constraints '%s'",
5072                                constraints);
5073                         continue;
5074                 }
5075
5076                 ir_asm_constraint constraint;
5077                 constraint.pos        = pos;
5078                 constraint.constraint = new_id_from_str(constraints);
5079                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5080
5081                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5082         }
5083         assert(obstack_object_size(&asm_obst)
5084                         == out_size * sizeof(ir_asm_constraint));
5085         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5086
5087
5088         obstack_grow(&asm_obst, tmp_in_constraints,
5089                      in_size * sizeof(tmp_in_constraints[0]));
5090         /* find and count input and output arguments */
5091         argument = statement->inputs;
5092         for ( ; argument != NULL; argument = argument->next) {
5093                 const char *constraints = argument->constraints.begin;
5094                 asm_constraint_flags_t asm_flags
5095                         = be_parse_asm_constraints(constraints);
5096
5097                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5098                         errorf(&statement->base.source_position,
5099                                "some constraints in '%s' are not supported", constraints);
5100                         continue;
5101                 }
5102                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5103                         errorf(&statement->base.source_position,
5104                                "some constraints in '%s' are invalid", constraints);
5105                         continue;
5106                 }
5107                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5108                         errorf(&statement->base.source_position,
5109                                "write flag specified for input constraints '%s'",
5110                                constraints);
5111                         continue;
5112                 }
5113
5114                 ir_node *input;
5115                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5116                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5117                         /* we can treat this as "normal" input */
5118                         input = expression_to_firm(argument->expression);
5119                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5120                         /* pure memory ops need no input (but we have to make sure we
5121                          * attach to the memory) */
5122                         assert(! (asm_flags &
5123                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5124                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5125                         needs_memory = true;
5126                         input = expression_to_addr(argument->expression);
5127                 } else {
5128                         errorf(&statement->base.source_position,
5129                                "only modifiers but no place set in constraints '%s'",
5130                                constraints);
5131                         continue;
5132                 }
5133
5134                 ir_asm_constraint constraint;
5135                 constraint.pos        = next_pos++;
5136                 constraint.constraint = new_id_from_str(constraints);
5137                 constraint.mode       = get_irn_mode(input);
5138
5139                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5140                 ins[in_size++] = input;
5141         }
5142
5143         if (needs_memory) {
5144                 ir_asm_constraint constraint;
5145                 constraint.pos        = next_pos++;
5146                 constraint.constraint = new_id_from_str("");
5147                 constraint.mode       = mode_M;
5148
5149                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5150                 ins[in_size++] = get_store();
5151         }
5152
5153         assert(obstack_object_size(&asm_obst)
5154                         == in_size * sizeof(ir_asm_constraint));
5155         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5156
5157         /* create asm node */
5158         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5159
5160         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5161
5162         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5163                                   out_size, output_constraints,
5164                                   n_clobbers, clobbers, asm_text);
5165
5166         if (statement->is_volatile) {
5167                 set_irn_pinned(node, op_pin_state_pinned);
5168         } else {
5169                 set_irn_pinned(node, op_pin_state_floats);
5170         }
5171
5172         /* create output projs & connect them */
5173         if (needs_memory) {
5174                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5175                 set_store(projm);
5176         }
5177
5178         size_t i;
5179         for (i = 0; i < out_size; ++i) {
5180                 const expression_t *out_expr = out_exprs[i];
5181                 long                pn       = i;
5182                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5183                 ir_node            *proj     = new_Proj(node, mode, pn);
5184                 ir_node            *addr     = out_addrs[i];
5185
5186                 set_value_for_expression_addr(out_expr, proj, addr);
5187         }
5188 }
5189
5190 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5191 {
5192         statement_to_firm(statement->try_statement);
5193         warningf(&statement->base.source_position, "structured exception handling ignored");
5194 }
5195
5196 static void     leave_statement_to_firm(leave_statement_t *statement)
5197 {
5198         errorf(&statement->base.source_position, "__leave not supported yet");
5199 }
5200
5201 /**
5202  * Transform a statement.
5203  */
5204 static void statement_to_firm(statement_t *statement)
5205 {
5206 #ifndef NDEBUG
5207         assert(!statement->base.transformed);
5208         statement->base.transformed = true;
5209 #endif
5210
5211         switch (statement->kind) {
5212         case STATEMENT_INVALID:
5213                 panic("invalid statement found");
5214         case STATEMENT_EMPTY:
5215                 /* nothing */
5216                 return;
5217         case STATEMENT_COMPOUND:
5218                 compound_statement_to_firm(&statement->compound);
5219                 return;
5220         case STATEMENT_RETURN:
5221                 return_statement_to_firm(&statement->returns);
5222                 return;
5223         case STATEMENT_EXPRESSION:
5224                 expression_statement_to_firm(&statement->expression);
5225                 return;
5226         case STATEMENT_IF:
5227                 if_statement_to_firm(&statement->ifs);
5228                 return;
5229         case STATEMENT_WHILE:
5230                 while_statement_to_firm(&statement->whiles);
5231                 return;
5232         case STATEMENT_DO_WHILE:
5233                 do_while_statement_to_firm(&statement->do_while);
5234                 return;
5235         case STATEMENT_DECLARATION:
5236                 declaration_statement_to_firm(&statement->declaration);
5237                 return;
5238         case STATEMENT_BREAK:
5239                 create_jump_statement(statement, get_break_label());
5240                 return;
5241         case STATEMENT_CONTINUE:
5242                 create_jump_statement(statement, continue_label);
5243                 return;
5244         case STATEMENT_SWITCH:
5245                 switch_statement_to_firm(&statement->switchs);
5246                 return;
5247         case STATEMENT_CASE_LABEL:
5248                 case_label_to_firm(&statement->case_label);
5249                 return;
5250         case STATEMENT_FOR:
5251                 for_statement_to_firm(&statement->fors);
5252                 return;
5253         case STATEMENT_LABEL:
5254                 label_to_firm(&statement->label);
5255                 return;
5256         case STATEMENT_GOTO:
5257                 goto_to_firm(&statement->gotos);
5258                 return;
5259         case STATEMENT_ASM:
5260                 asm_statement_to_firm(&statement->asms);
5261                 return;
5262         case STATEMENT_MS_TRY:
5263                 ms_try_statement_to_firm(&statement->ms_try);
5264                 return;
5265         case STATEMENT_LEAVE:
5266                 leave_statement_to_firm(&statement->leave);
5267                 return;
5268         }
5269         panic("statement not implemented");
5270 }
5271
5272 static int count_local_variables(const entity_t *entity,
5273                                  const entity_t *const last)
5274 {
5275         int count = 0;
5276         entity_t const *const end = last != NULL ? last->base.next : NULL;
5277         for (; entity != end; entity = entity->base.next) {
5278                 type_t *type;
5279                 bool    address_taken;
5280
5281                 if (entity->kind == ENTITY_VARIABLE) {
5282                         type          = skip_typeref(entity->declaration.type);
5283                         address_taken = entity->variable.address_taken;
5284                 } else if (entity->kind == ENTITY_PARAMETER) {
5285                         type          = skip_typeref(entity->declaration.type);
5286                         address_taken = entity->parameter.address_taken;
5287                 } else {
5288                         continue;
5289                 }
5290
5291                 if (!address_taken && is_type_scalar(type))
5292                         ++count;
5293         }
5294         return count;
5295 }
5296
5297 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5298 {
5299         int *const count = env;
5300
5301         switch (stmt->kind) {
5302         case STATEMENT_DECLARATION: {
5303                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5304                 *count += count_local_variables(decl_stmt->declarations_begin,
5305                                 decl_stmt->declarations_end);
5306                 break;
5307         }
5308
5309         case STATEMENT_FOR:
5310                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5311                 break;
5312
5313         default:
5314                 break;
5315         }
5316 }
5317
5318 static int get_function_n_local_vars(entity_t *entity)
5319 {
5320         int count = 0;
5321
5322         /* count parameters */
5323         count += count_local_variables(entity->function.parameters.entities, NULL);
5324
5325         /* count local variables declared in body */
5326         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5327                         &count);
5328         return count;
5329 }
5330
5331 static void initialize_function_parameters(entity_t *entity)
5332 {
5333         assert(entity->kind == ENTITY_FUNCTION);
5334         ir_graph *irg             = current_ir_graph;
5335         ir_node  *args            = get_irg_args(irg);
5336         ir_node  *start_block     = get_irg_start_block(irg);
5337         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5338
5339         int       n         = 0;
5340         entity_t *parameter = entity->function.parameters.entities;
5341         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5342                 assert(parameter->kind == ENTITY_PARAMETER);
5343                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5344                 type_t *type = skip_typeref(parameter->declaration.type);
5345
5346                 bool needs_entity = parameter->parameter.address_taken;
5347                 assert(!is_type_array(type));
5348                 if (is_type_compound(type)) {
5349                         needs_entity = true;
5350                 }
5351
5352                 if (needs_entity) {
5353                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5354                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5355                         set_entity_ident(entity, id);
5356
5357                         parameter->declaration.kind
5358                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5359                         parameter->parameter.v.entity = entity;
5360                         continue;
5361                 }
5362
5363                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5364                 ir_mode *param_mode   = get_type_mode(param_irtype);
5365
5366                 long     pn    = n;
5367                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5368
5369                 ir_mode *mode = get_ir_mode_storage(type);
5370                 value = create_conv(NULL, value, mode);
5371                 value = do_strict_conv(NULL, value);
5372
5373                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5374                 parameter->parameter.v.value_number = next_value_number_function;
5375                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5376                                         parameter);
5377                 ++next_value_number_function;
5378
5379                 set_value(parameter->parameter.v.value_number, value);
5380         }
5381 }
5382
5383 /**
5384  * Handle additional decl modifiers for IR-graphs
5385  *
5386  * @param irg            the IR-graph
5387  * @param dec_modifiers  additional modifiers
5388  */
5389 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5390 {
5391         if (decl_modifiers & DM_RETURNS_TWICE) {
5392                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5393                 set_irg_additional_property(irg, mtp_property_returns_twice);
5394         }
5395         if (decl_modifiers & DM_NORETURN) {
5396                 /* TRUE if the declaration includes the Microsoft
5397                    __declspec(noreturn) specifier. */
5398                 set_irg_additional_property(irg, mtp_property_noreturn);
5399         }
5400         if (decl_modifiers & DM_NOTHROW) {
5401                 /* TRUE if the declaration includes the Microsoft
5402                    __declspec(nothrow) specifier. */
5403                 set_irg_additional_property(irg, mtp_property_nothrow);
5404         }
5405         if (decl_modifiers & DM_NAKED) {
5406                 /* TRUE if the declaration includes the Microsoft
5407                    __declspec(naked) specifier. */
5408                 set_irg_additional_property(irg, mtp_property_naked);
5409         }
5410         if (decl_modifiers & DM_FORCEINLINE) {
5411                 /* TRUE if the declaration includes the
5412                    Microsoft __forceinline specifier. */
5413                 set_irg_inline_property(irg, irg_inline_forced);
5414         }
5415         if (decl_modifiers & DM_NOINLINE) {
5416                 /* TRUE if the declaration includes the Microsoft
5417                    __declspec(noinline) specifier. */
5418                 set_irg_inline_property(irg, irg_inline_forbidden);
5419         }
5420 }
5421
5422 static void add_function_pointer(ir_type *segment, ir_entity *method,
5423                                  const char *unique_template)
5424 {
5425         ir_type   *method_type  = get_entity_type(method);
5426         ident     *id           = id_unique(unique_template);
5427         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5428
5429         ident     *ide          = id_unique(unique_template);
5430         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5431         ir_graph  *irg          = get_const_code_irg();
5432         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5433                                                            method, NULL);
5434
5435         set_entity_compiler_generated(ptr, 1);
5436         set_entity_variability(ptr, variability_constant);
5437         set_atomic_ent_value(ptr, val);
5438 }
5439
5440 /**
5441  * Generate possible IJmp branches to a given label block.
5442  */
5443 static void gen_ijmp_branches(ir_node *block)
5444 {
5445         ir_node *ijmp;
5446         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5447                 add_immBlock_pred(block, ijmp);
5448         }
5449 }
5450
5451 /**
5452  * Create code for a function.
5453  */
5454 static void create_function(entity_t *entity)
5455 {
5456         assert(entity->kind == ENTITY_FUNCTION);
5457         ir_entity *function_entity = get_function_entity(entity);
5458
5459         if (entity->function.statement == NULL)
5460                 return;
5461
5462         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5463                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5464                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5465         }
5466         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5467                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5468                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5469         }
5470
5471         current_function_entity = entity;
5472         current_function_name   = NULL;
5473         current_funcsig         = NULL;
5474
5475         assert(all_labels == NULL);
5476         all_labels = NEW_ARR_F(label_t *, 0);
5477         ijmp_list  = NULL;
5478
5479         int       n_local_vars = get_function_n_local_vars(entity);
5480         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5481
5482         ir_graph *old_current_function = current_function;
5483         current_function = irg;
5484
5485         set_irg_fp_model(irg, firm_opt.fp_model);
5486         tarval_enable_fp_ops(1);
5487         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5488
5489         ir_node *first_block = get_cur_block();
5490
5491         /* set inline flags */
5492         if (entity->function.is_inline)
5493                 set_irg_inline_property(irg, irg_inline_recomended);
5494         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5495
5496         next_value_number_function = 0;
5497         initialize_function_parameters(entity);
5498
5499         statement_to_firm(entity->function.statement);
5500
5501         ir_node *end_block = get_irg_end_block(irg);
5502
5503         /* do we have a return statement yet? */
5504         if (get_cur_block() != NULL) {
5505                 type_t *type = skip_typeref(entity->declaration.type);
5506                 assert(is_type_function(type));
5507                 const function_type_t *func_type   = &type->function;
5508                 const type_t          *return_type
5509                         = skip_typeref(func_type->return_type);
5510
5511                 ir_node *ret;
5512                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5513                         ret = new_Return(get_store(), 0, NULL);
5514                 } else {
5515                         ir_mode *mode;
5516                         if (is_type_scalar(return_type)) {
5517                                 mode = get_ir_mode_storage(func_type->return_type);
5518                         } else {
5519                                 mode = mode_P_data;
5520                         }
5521
5522                         ir_node *in[1];
5523                         /* §5.1.2.2.3 main implicitly returns 0 */
5524                         if (is_main(entity)) {
5525                                 in[0] = new_Const(get_mode_null(mode));
5526                         } else {
5527                                 in[0] = new_Unknown(mode);
5528                         }
5529                         ret = new_Return(get_store(), 1, in);
5530                 }
5531                 add_immBlock_pred(end_block, ret);
5532         }
5533
5534         bool has_computed_gotos = false;
5535         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5536                 label_t *label = all_labels[i];
5537                 if (label->address_taken) {
5538                         gen_ijmp_branches(label->block);
5539                         has_computed_gotos = true;
5540                 }
5541                 mature_immBlock(label->block);
5542         }
5543         if (has_computed_gotos) {
5544                 /* if we have computed goto's in the function, we cannot inline it */
5545                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5546                         warningf(&entity->base.source_position,
5547                                  "function '%Y' can never be inlined because it contains a computed goto",
5548                                  entity->base.symbol);
5549                 }
5550                 set_irg_inline_property(irg, irg_inline_forbidden);
5551         }
5552
5553         DEL_ARR_F(all_labels);
5554         all_labels = NULL;
5555
5556         mature_immBlock(first_block);
5557         mature_immBlock(end_block);
5558
5559         irg_finalize_cons(irg);
5560
5561         /* finalize the frame type */
5562         ir_type *frame_type = get_irg_frame_type(irg);
5563         int      n          = get_compound_n_members(frame_type);
5564         int      align_all  = 4;
5565         int      offset     = 0;
5566         for (int i = 0; i < n; ++i) {
5567                 ir_entity *entity      = get_compound_member(frame_type, i);
5568                 ir_type   *entity_type = get_entity_type(entity);
5569
5570                 int align = get_type_alignment_bytes(entity_type);
5571                 if (align > align_all)
5572                         align_all = align;
5573                 int misalign = 0;
5574                 if (align > 0) {
5575                         misalign  = offset % align;
5576                         if (misalign > 0) {
5577                                 offset += align - misalign;
5578                         }
5579                 }
5580
5581                 set_entity_offset(entity, offset);
5582                 offset += get_type_size_bytes(entity_type);
5583         }
5584         set_type_size_bytes(frame_type, offset);
5585         set_type_alignment_bytes(frame_type, align_all);
5586
5587         irg_vrfy(irg);
5588         current_function = old_current_function;
5589
5590         /* create inner functions */
5591         entity_t *inner;
5592         for (inner = next_inner_function(); inner != NULL;
5593              inner = next_inner_function()) {
5594                 create_function(inner);
5595         }
5596 }
5597
5598 static void scope_to_firm(scope_t *scope)
5599 {
5600         /* first pass: create declarations */
5601         entity_t *entity = scope->entities;
5602         for ( ; entity != NULL; entity = entity->base.next) {
5603                 if (entity->base.symbol == NULL)
5604                         continue;
5605
5606                 if (entity->kind == ENTITY_FUNCTION) {
5607                         get_function_entity(entity);
5608                 } else if (entity->kind == ENTITY_VARIABLE) {
5609                         create_global_variable(entity);
5610                 }
5611         }
5612
5613         /* second pass: create code/initializers */
5614         entity = scope->entities;
5615         for ( ; entity != NULL; entity = entity->base.next) {
5616                 if (entity->base.symbol == NULL)
5617                         continue;
5618
5619                 if (entity->kind == ENTITY_FUNCTION) {
5620                         create_function(entity);
5621                 } else if (entity->kind == ENTITY_VARIABLE) {
5622                         assert(entity->declaration.kind
5623                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5624                         current_ir_graph = get_const_code_irg();
5625                         create_variable_initializer(entity);
5626                 }
5627         }
5628 }
5629
5630 void init_ast2firm(void)
5631 {
5632         obstack_init(&asm_obst);
5633         init_atomic_modes();
5634
5635         /* OS option must be set to the backend */
5636         switch (firm_opt.os_support) {
5637         case OS_SUPPORT_MINGW:
5638                 create_ld_ident = create_name_win32;
5639                 break;
5640         case OS_SUPPORT_LINUX:
5641                 create_ld_ident = create_name_linux_elf;
5642                 break;
5643         case OS_SUPPORT_MACHO:
5644                 create_ld_ident = create_name_macho;
5645                 break;
5646         default:
5647                 panic("unexpected OS support mode");
5648         }
5649
5650         /* create idents for all known runtime functions */
5651         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5652                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5653         }
5654
5655         entitymap_init(&entitymap);
5656 }
5657
5658 static void init_ir_types(void)
5659 {
5660         static int ir_types_initialized = 0;
5661         if (ir_types_initialized)
5662                 return;
5663         ir_types_initialized = 1;
5664
5665         ir_type_int        = get_ir_type(type_int);
5666         ir_type_const_char = get_ir_type(type_const_char);
5667         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5668         ir_type_void       = get_ir_type(type_void);
5669
5670         const backend_params *be_params = be_get_backend_param();
5671         mode_float_arithmetic = be_params->mode_float_arithmetic;
5672 }
5673
5674 void exit_ast2firm(void)
5675 {
5676         entitymap_destroy(&entitymap);
5677         obstack_free(&asm_obst, NULL);
5678 }
5679
5680 static void global_asm_to_firm(statement_t *s)
5681 {
5682         for (; s != NULL; s = s->base.next) {
5683                 assert(s->kind == STATEMENT_ASM);
5684
5685                 char const *const text = s->asms.asm_text.begin;
5686                 size_t            size = s->asms.asm_text.size;
5687
5688                 /* skip the last \0 */
5689                 if (text[size - 1] == '\0')
5690                         --size;
5691
5692                 ident *const id = new_id_from_chars(text, size);
5693                 add_irp_asm(id);
5694         }
5695 }
5696
5697 void translation_unit_to_firm(translation_unit_t *unit)
5698 {
5699         /* just to be sure */
5700         continue_label           = NULL;
5701         break_label              = NULL;
5702         current_switch_cond      = NULL;
5703         current_translation_unit = unit;
5704
5705         init_ir_types();
5706         inner_functions = NEW_ARR_F(entity_t *, 0);
5707
5708         scope_to_firm(&unit->scope);
5709         global_asm_to_firm(unit->global_asm);
5710
5711         DEL_ARR_F(inner_functions);
5712         inner_functions  = NULL;
5713
5714         current_ir_graph         = NULL;
5715         current_translation_unit = NULL;
5716 }