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
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "warning.h"
  43 #include "entitymap_t.h"
  44 #include "driver/firm_opt.h"
  45 #include "driver/firm_cmdline.h"
  46
  47 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  48
  49 /* some idents needed for name mangling */
  50 static ident *id_underscore;
  51 static ident *id_imp;
  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 static type_t *type_const_char;
  59
  60 static int       next_value_number_function;
  61 static ir_node  *continue_label;
  62 static ir_node  *break_label;
  63 static ir_node  *current_switch_cond;
  64 static bool      saw_default_label;
  65 static ir_node **imature_blocks;
  66 static bool constant_folding;
  67
  68 static const declaration_t *current_function_decl;
  69 static ir_node             *current_function_name;
  70 static ir_node             *current_funcsig;
  71
  72 static entitymap_t  entitymap;
  73
  74 static struct obstack asm_obst;
  75
  76 typedef enum declaration_kind_t {
  77         DECLARATION_KIND_UNKNOWN,
  78         DECLARATION_KIND_FUNCTION,
  79         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  80         DECLARATION_KIND_GLOBAL_VARIABLE,
  81         DECLARATION_KIND_LOCAL_VARIABLE,
  82         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  83         DECLARATION_KIND_COMPOUND_MEMBER,
  84         DECLARATION_KIND_LABEL_BLOCK,
  85         DECLARATION_KIND_ENUM_ENTRY,
  86         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  87         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  88         DECLARATION_KIND_TYPE
  89 } declaration_kind_t;
  90
  91 static ir_type *get_ir_type(type_t *type);
  92 static ir_type *get_ir_type_incomplete(type_t *type);
  93 static int count_decls_in_stmts(const statement_t *stmt);
  94
  95 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  96 {
  97         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  98
  99         if (declaration != NULL) {
 100                 warningf(&declaration->source_position,
 101                          "variable '%#T' might be used uninitialized",
 102                          declaration->type, declaration->symbol);
 103         }
 104         return new_r_Unknown(irg, mode);
 105 }
 106
 107 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 108 {
 109         const source_position_t *pos = (const source_position_t*) dbg;
 110         if (pos == NULL)
 111                 return 0;
 112         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 113                                    pos->linenr);
 114 }
 115
 116 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 117 {
 118         const source_position_t *pos = (const source_position_t*) dbg;
 119         if (pos == NULL)
 120                 return NULL;
 121         if (line != NULL)
 122                 *line = pos->linenr;
 123         return pos->input_name;
 124 }
 125
 126 static dbg_info *get_dbg_info(const source_position_t *pos)
 127 {
 128         return (dbg_info*) pos;
 129 }
 130
 131 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 132
 133 static ir_mode *mode_int, *mode_uint;
 134
 135 static ir_node *_expression_to_firm(const expression_t *expression);
 136 static ir_node *expression_to_firm(const expression_t *expression);
 137 static inline ir_mode *get_ir_mode(type_t *type);
 138 static void create_local_declaration(declaration_t *declaration);
 139
 140 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 141 {
 142         unsigned flags = get_atomic_type_flags(kind);
 143         unsigned size  = get_atomic_type_size(kind);
 144         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 145                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 146                 char            name[64];
 147                 ir_mode_sort    sort;
 148                 unsigned        bit_size     = size * 8;
 149                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 150                 ir_mode_arithmetic arithmetic;
 151                 unsigned        modulo_shift;
 152
 153                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 154                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 155                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 156                         sort         = irms_int_number;
 157                         arithmetic   = irma_twos_complement;
 158                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 159                 } else {
 160                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 161                         snprintf(name, sizeof(name), "f%d", bit_size);
 162                         sort         = irms_float_number;
 163                         arithmetic   = irma_ieee754;
 164                         modulo_shift = 0;
 165                 }
 166                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 167                                    modulo_shift);
 168         }
 169
 170         return NULL;
 171 }
 172
 173 /**
 174  * Initialises the atomic modes depending on the machine size.
 175  */
 176 static void init_atomic_modes(void)
 177 {
 178         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 179                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 180         }
 181         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 182         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 183
 184         /* there's no real void type in firm */
 185         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 186
 187         /* initialize pointer modes */
 188         char            name[64];
 189         ir_mode_sort    sort         = irms_reference;
 190         unsigned        bit_size     = machine_size;
 191         bool            is_signed    = 0;
 192         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 193         unsigned        modulo_shift
 194                 = bit_size < machine_size ? machine_size : bit_size;
 195
 196         snprintf(name, sizeof(name), "p%d", machine_size);
 197         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 198                                         modulo_shift);
 199
 200         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 201         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 202
 203         /* Hmm, pointers should be machine size */
 204         set_modeP_data(ptr_mode);
 205         set_modeP_code(ptr_mode);
 206 }
 207
 208 static unsigned get_compound_type_size(compound_type_t *type)
 209 {
 210         ir_type *irtype = get_ir_type((type_t*) type);
 211         return get_type_size_bytes(irtype);
 212 }
 213
 214 static unsigned get_array_type_size(array_type_t *type)
 215 {
 216         assert(!type->is_vla);
 217         ir_type *irtype = get_ir_type((type_t*) type);
 218         return get_type_size_bytes(irtype);
 219 }
 220
 221
 222 static unsigned get_type_size_const(type_t *type)
 223 {
 224         switch(type->kind) {
 225         case TYPE_ERROR:
 226                 panic("error type occurred");
 227         case TYPE_ATOMIC:
 228                 return get_atomic_type_size(type->atomic.akind);
 229         case TYPE_COMPLEX:
 230                 return 2 * get_atomic_type_size(type->complex.akind);
 231         case TYPE_IMAGINARY:
 232                 return get_atomic_type_size(type->imaginary.akind);
 233         case TYPE_ENUM:
 234                 return get_mode_size_bytes(mode_int);
 235         case TYPE_COMPOUND_UNION:
 236         case TYPE_COMPOUND_STRUCT:
 237                 return get_compound_type_size(&type->compound);
 238         case TYPE_FUNCTION:
 239                 /* just a pointer to the function */
 240                 return get_mode_size_bytes(mode_P_code);
 241         case TYPE_POINTER:
 242                 return get_mode_size_bytes(mode_P_data);
 243         case TYPE_ARRAY:
 244                 return get_array_type_size(&type->array);
 245         case TYPE_BUILTIN:
 246                 return get_type_size_const(type->builtin.real_type);
 247         case TYPE_BITFIELD:
 248                 panic("type size of bitfield request");
 249         case TYPE_TYPEDEF:
 250         case TYPE_TYPEOF:
 251         case TYPE_INVALID:
 252                 break;
 253         }
 254         panic("Trying to determine size of invalid type");
 255 }
 256
 257 static ir_node *get_type_size(type_t *type)
 258 {
 259         type = skip_typeref(type);
 260
 261         if (is_type_array(type) && type->array.is_vla) {
 262                 ir_node *size_node = type->array.size_node;
 263                 if (size_node == NULL) {
 264                         size_node = expression_to_firm(type->array.size_expression);
 265                         assert(!is_Const(size_node));
 266                         type->array.size_node = size_node;
 267                 }
 268
 269                 ir_node *elem_size = get_type_size(type->array.element_type);
 270                 ir_mode *mode      = get_irn_mode(size_node);
 271                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 272                 return real_size;
 273         }
 274
 275         ir_mode *mode = get_ir_mode(type_size_t);
 276         symconst_symbol sym;
 277         sym.type_p = get_ir_type(type);
 278         return new_SymConst(mode, sym, symconst_type_size);
 279 }
 280
 281 static unsigned count_parameters(const function_type_t *function_type)
 282 {
 283         unsigned count = 0;
 284
 285         function_parameter_t *parameter = function_type->parameters;
 286         for ( ; parameter != NULL; parameter = parameter->next) {
 287                 ++count;
 288         }
 289
 290         return count;
 291 }
 292
 293 /**
 294  * Creates a Firm type for an atomic type
 295  */
 296 static ir_type *create_atomic_type(const atomic_type_t *type)
 297 {
 298         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 299         atomic_type_kind_t  kind      = type->akind;
 300         ir_mode            *mode      = _atomic_modes[kind];
 301         ident              *id        = get_mode_ident(mode);
 302         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 303
 304         set_type_alignment_bytes(irtype, type->base.alignment);
 305
 306         return irtype;
 307 }
 308
 309 /**
 310  * Creates a Firm type for a complex type
 311  */
 312 static ir_type *create_complex_type(const complex_type_t *type)
 313 {
 314         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 315         atomic_type_kind_t  kind      = type->akind;
 316         ir_mode            *mode      = _atomic_modes[kind];
 317         ident              *id        = get_mode_ident(mode);
 318
 319         (void) id;
 320         (void) dbgi;
 321
 322         /* FIXME: finish the array */
 323         return NULL;
 324 }
 325
 326 /**
 327  * Creates a Firm type for an imaginary type
 328  */
 329 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 330 {
 331         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 332         atomic_type_kind_t  kind      = type->akind;
 333         ir_mode            *mode      = _atomic_modes[kind];
 334         ident              *id        = get_mode_ident(mode);
 335         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 336
 337         set_type_alignment_bytes(irtype, type->base.alignment);
 338
 339         return irtype;
 340 }
 341
 342 /**
 343  * return type of a parameter (and take transparent union gnu extension into
 344  * account)
 345  */
 346 static type_t *get_parameter_type(type_t *type)
 347 {
 348         type = skip_typeref(type);
 349         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 350                 declaration_t *decl = type->compound.declaration;
 351                 type                = decl->scope.declarations->type;
 352         }
 353
 354         return type;
 355 }
 356
 357 static ir_type *create_method_type(const function_type_t *function_type)
 358 {
 359         type_t  *return_type  = function_type->return_type;
 360
 361         ident   *id           = id_unique("functiontype.%u");
 362         int      n_parameters = count_parameters(function_type);
 363         int      n_results    = return_type == type_void ? 0 : 1;
 364         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 365         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 366
 367         if (return_type != type_void) {
 368                 ir_type *restype = get_ir_type(return_type);
 369                 set_method_res_type(irtype, 0, restype);
 370         }
 371
 372         function_parameter_t *parameter = function_type->parameters;
 373         int                   n         = 0;
 374         for ( ; parameter != NULL; parameter = parameter->next) {
 375                 type_t  *type     = get_parameter_type(parameter->type);
 376                 ir_type *p_irtype = get_ir_type(type);
 377                 set_method_param_type(irtype, n, p_irtype);
 378                 ++n;
 379         }
 380
 381         if (function_type->variadic || function_type->unspecified_parameters) {
 382                 set_method_variadicity(irtype, variadicity_variadic);
 383         }
 384
 385         unsigned cc = get_method_calling_convention(irtype);
 386         switch (function_type->calling_convention) {
 387         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typical cdecl */
 388 is_cdecl:
 389                 set_method_calling_convention(irtype, SET_CDECL(cc));
 390                 break;
 391
 392         case CC_CDECL:
 393                 set_method_calling_convention(irtype, cc_fixed | SET_CDECL(cc));
 394                 break;
 395
 396         case CC_STDCALL:
 397                 if (function_type->variadic || function_type->unspecified_parameters)
 398                         goto is_cdecl;
 399
 400                 /* only non-variadic function can use stdcall, else use cdecl */
 401                 set_method_calling_convention(irtype, cc_fixed | SET_STDCALL(cc));
 402                 break;
 403
 404         case CC_FASTCALL:
 405                 if (function_type->variadic || function_type->unspecified_parameters)
 406                         goto is_cdecl;
 407                 /* only non-variadic function can use fastcall, else use cdecl */
 408                 set_method_calling_convention(irtype, cc_fixed | SET_FASTCALL(cc));
 409                 break;
 410
 411         case CC_THISCALL:
 412                 /* Hmm, leave default, not accepted by the parser yet. */
 413                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 414                 break;
 415         }
 416         return irtype;
 417 }
 418
 419 static ir_type *create_pointer_type(pointer_type_t *type)
 420 {
 421         type_t   *points_to    = type->points_to;
 422         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 423         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 424         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 425                                                     ir_points_to, mode_P_data, dbgi);
 426
 427         return ir_type;
 428 }
 429
 430 static ir_type *create_array_type(array_type_t *type)
 431 {
 432         type_t  *element_type    = type->element_type;
 433         ir_type *ir_element_type = get_ir_type(element_type);
 434
 435         ident    *id      = id_unique("array.%u");
 436         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 437         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 438
 439         const int align = get_type_alignment_bytes(ir_element_type);
 440         set_type_alignment_bytes(ir_type, align);
 441
 442         if (type->size_constant) {
 443                 int n_elements = type->size;
 444
 445                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 446
 447                 size_t elemsize = get_type_size_bytes(ir_element_type);
 448                 if (elemsize % align > 0) {
 449                         elemsize += align - (elemsize % align);
 450                 }
 451                 set_type_size_bytes(ir_type, n_elements * elemsize);
 452         } else {
 453                 set_array_lower_bound_int(ir_type, 0, 0);
 454         }
 455         set_type_state(ir_type, layout_fixed);
 456
 457         return ir_type;
 458 }
 459
 460 /**
 461  * Return the signed integer type of size bits.
 462  *
 463  * @param size   the size
 464  */
 465 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 466                                                  unsigned size)
 467 {
 468         static ir_mode *s_modes[64 + 1] = {NULL, };
 469         ir_type *res;
 470         ir_mode *mode;
 471
 472         if (size <= 0 || size > 64)
 473                 return NULL;
 474
 475         mode = s_modes[size];
 476         if (mode == NULL) {
 477                 char name[32];
 478
 479                 snprintf(name, sizeof(name), "bf_I%u", size);
 480                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 481                                    size <= 32 ? 32 : size );
 482                 s_modes[size] = mode;
 483         }
 484
 485         char name[32];
 486         snprintf(name, sizeof(name), "I%u", size);
 487         ident *id = new_id_from_str(name);
 488         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 489         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 490         set_primitive_base_type(res, base_tp);
 491
 492         return res;
 493 }
 494
 495 /**
 496  * Return the unsigned integer type of size bits.
 497  *
 498  * @param size   the size
 499  */
 500 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 501                                                    unsigned size)
 502 {
 503         static ir_mode *u_modes[64 + 1] = {NULL, };
 504         ir_type *res;
 505         ir_mode *mode;
 506
 507         if (size <= 0 || size > 64)
 508                 return NULL;
 509
 510         mode = u_modes[size];
 511         if (mode == NULL) {
 512                 char name[32];
 513
 514                 snprintf(name, sizeof(name), "bf_U%u", size);
 515                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 516                                    size <= 32 ? 32 : size );
 517                 u_modes[size] = mode;
 518         }
 519
 520         char name[32];
 521
 522         snprintf(name, sizeof(name), "U%u", size);
 523         ident *id = new_id_from_str(name);
 524         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 525         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 526         set_primitive_base_type(res, base_tp);
 527
 528         return res;
 529 }
 530
 531 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 532 {
 533         type_t *base = skip_typeref(type->base_type);
 534         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 535         ir_type *irbase = get_ir_type(base);
 536
 537         unsigned size = fold_constant(type->size);
 538
 539         assert(!is_type_float(base));
 540         if (is_type_signed(base)) {
 541                 return get_signed_int_type_for_bit_size(irbase, size);
 542         } else {
 543                 return get_unsigned_int_type_for_bit_size(irbase, size);
 544         }
 545 }
 546
 547 #define INVALID_TYPE ((ir_type_ptr)-1)
 548
 549 enum {
 550         COMPOUND_IS_STRUCT = false,
 551         COMPOUND_IS_UNION  = true
 552 };
 553
 554 /**
 555  * Construct firm type from ast struct type.
 556  *
 557  * As anonymous inner structs get flattened to a single firm type, we might get
 558  * irtype, outer_offset and out_align passed (they represent the position of
 559  * the anonymous inner struct inside the resulting firm struct)
 560  */
 561 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 562                                      size_t *outer_offset, size_t *outer_align,
 563                                      bool incomplete, bool is_union)
 564 {
 565         declaration_t      *declaration = type->declaration;
 566         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 567
 568         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 569                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 570                                 && incomplete))
 571                 return declaration->v.irtype;
 572
 573         size_t align_all  = 1;
 574         size_t offset     = 0;
 575         size_t bit_offset = 0;
 576         size_t size       = 0;
 577
 578         if (irtype == NULL) {
 579                 symbol_t *symbol = declaration->symbol;
 580                 ident    *id;
 581                 if (symbol != NULL) {
 582                         id = new_id_from_str(symbol->string);
 583                 } else {
 584                         if (is_union) {
 585                                 id = id_unique("__anonymous_union.%u");
 586                         } else {
 587                                 id = id_unique("__anonymous_struct.%u");
 588                         }
 589                 }
 590                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 591
 592                 if (is_union) {
 593                         irtype = new_d_type_union(id, dbgi);
 594                 } else {
 595                         irtype = new_d_type_struct(id, dbgi);
 596                 }
 597
 598                 declaration->declaration_kind
 599                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 600                 declaration->v.irtype         = irtype;
 601                 //type->base.firm_type          = irtype;
 602         } else {
 603                 offset    = *outer_offset;
 604                 align_all = *outer_align;
 605         }
 606
 607         if (incomplete)
 608                 return irtype;
 609
 610         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 611
 612         declaration_t *entry = declaration->scope.declarations;
 613         for( ; entry != NULL; entry = entry->next) {
 614                 if (entry->namespc != NAMESPACE_NORMAL)
 615                         continue;
 616
 617                 size_t prev_offset = offset;
 618
 619                 symbol_t *symbol     = entry->symbol;
 620                 type_t   *entry_type = skip_typeref(entry->type);
 621                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 622
 623                 ident    *ident;
 624                 if (symbol != NULL) {
 625                         ident = new_id_from_str(symbol->string);
 626                 } else {
 627                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 628                                 create_compound_type(&entry_type->compound, irtype, &offset,
 629                                                      &align_all, false, COMPOUND_IS_STRUCT);
 630                                 goto finished_member;
 631                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 632                                 create_compound_type(&entry_type->compound, irtype, &offset,
 633                                                      &align_all, false, COMPOUND_IS_UNION);
 634                                 goto finished_member;
 635                         } else {
 636                                 assert(entry_type->kind == TYPE_BITFIELD);
 637                         }
 638                         ident = id_unique("anon.%u");
 639                 }
 640
 641                 ir_type *base_irtype;
 642                 if (entry_type->kind == TYPE_BITFIELD) {
 643                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 644                 } else {
 645                         base_irtype = get_ir_type(entry_type);
 646                 }
 647
 648                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 649                 size_t misalign        = offset % entry_alignment;
 650
 651                 ir_type   *entry_irtype = get_ir_type(entry_type);
 652                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 653
 654                 size_t base;
 655                 size_t bits_remainder;
 656                 if (entry_type->kind == TYPE_BITFIELD) {
 657                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 658                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 659
 660                         if (size_bits > rest_size_bits) {
 661                                 /* start a new bucket */
 662                                 offset     += entry_alignment - misalign;
 663                                 bit_offset  = 0;
 664
 665                                 base           = offset;
 666                                 bits_remainder = 0;
 667                         } else {
 668                                 /* put into current bucket */
 669                                 base           = offset - misalign;
 670                                 bits_remainder = misalign * 8 + bit_offset;
 671                         }
 672
 673                         offset     += size_bits / 8;
 674                         bit_offset  = bit_offset + (size_bits % 8);
 675                 } else {
 676                         size_t entry_size = get_type_size_bytes(base_irtype);
 677                         if (misalign > 0 || bit_offset > 0)
 678                                 offset += entry_alignment - misalign;
 679
 680                         base           = offset;
 681                         bits_remainder = 0;
 682                         offset        += entry_size;
 683                         bit_offset     = 0;
 684                 }
 685
 686                 if (entry_alignment > align_all) {
 687                         if (entry_alignment % align_all != 0) {
 688                                 panic("uneven alignments not supported yet");
 689                         }
 690                         align_all = entry_alignment;
 691                 }
 692
 693                 set_entity_offset(entity, base);
 694                 set_entity_offset_bits_remainder(entity,
 695                                                  (unsigned char) bits_remainder);
 696                 //add_struct_member(irtype, entity);
 697                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 698                 assert(entry->v.entity == NULL);
 699                 entry->v.entity         = entity;
 700
 701 finished_member:
 702                 if (is_union) {
 703                         size_t entry_size = offset - prev_offset;
 704                         if (entry_size > size) {
 705                                 size = entry_size;
 706                         }
 707                         offset     = 0;
 708                         bit_offset = 0;
 709                 }
 710         }
 711
 712         if (!is_union) {
 713                 size = offset;
 714         }
 715
 716         size_t misalign = offset % align_all;
 717         if (misalign > 0 || bit_offset > 0) {
 718                 size += align_all - misalign;
 719         }
 720
 721         if (outer_offset != NULL) {
 722                 if (!is_union) {
 723                         *outer_offset = offset;
 724                 } else {
 725                         *outer_offset += size;
 726                 }
 727
 728                 if (align_all > *outer_align) {
 729                         if (align_all % *outer_align != 0) {
 730                                 panic("uneven alignments not supported yet");
 731                         }
 732                         *outer_align = align_all;
 733                 }
 734         } else {
 735                 set_type_alignment_bytes(irtype, align_all);
 736                 set_type_size_bytes(irtype, size);
 737                 set_type_state(irtype, layout_fixed);
 738         }
 739
 740         return irtype;
 741 }
 742
 743 static ir_type *create_enum_type(enum_type_t *const type)
 744 {
 745         type->base.firm_type = ir_type_int;
 746
 747         ir_mode *const mode    = mode_int;
 748         tarval  *const one     = get_mode_one(mode);
 749         tarval  *      tv_next = get_tarval_null(mode);
 750
 751         bool constant_folding_old = constant_folding;
 752         constant_folding = true;
 753
 754         declaration_t *declaration = type->declaration->next;
 755         for (; declaration != NULL; declaration = declaration->next) {
 756                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 757                         break;
 758
 759                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 760
 761                 expression_t *const init = declaration->init.enum_value;
 762                 if (init != NULL) {
 763                         ir_node *const cnst = expression_to_firm(init);
 764                         if (!is_Const(cnst)) {
 765                                 panic("couldn't fold constant");
 766                         }
 767                         tv_next = get_Const_tarval(cnst);
 768                 }
 769                 declaration->v.enum_val = tv_next;
 770                 tv_next = tarval_add(tv_next, one);
 771         }
 772
 773         constant_folding = constant_folding_old;
 774
 775         return ir_type_int;
 776 }
 777
 778 static ir_type *get_ir_type_incomplete(type_t *type)
 779 {
 780         assert(type != NULL);
 781         type = skip_typeref(type);
 782
 783         if (type->base.firm_type != NULL) {
 784                 assert(type->base.firm_type != INVALID_TYPE);
 785                 return type->base.firm_type;
 786         }
 787
 788         switch (type->kind) {
 789         case TYPE_COMPOUND_STRUCT:
 790                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 791                                             true, COMPOUND_IS_STRUCT);
 792         case TYPE_COMPOUND_UNION:
 793                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 794                                             true, COMPOUND_IS_UNION);
 795         default:
 796                 return get_ir_type(type);
 797         }
 798 }
 799
 800 static ir_type *get_ir_type(type_t *type)
 801 {
 802         assert(type != NULL);
 803
 804         type = skip_typeref(type);
 805
 806         if (type->base.firm_type != NULL) {
 807                 assert(type->base.firm_type != INVALID_TYPE);
 808                 return type->base.firm_type;
 809         }
 810
 811         ir_type *firm_type = NULL;
 812         switch (type->kind) {
 813         case TYPE_ERROR:
 814                 panic("error type occurred");
 815         case TYPE_ATOMIC:
 816                 firm_type = create_atomic_type(&type->atomic);
 817                 break;
 818         case TYPE_COMPLEX:
 819                 firm_type = create_complex_type(&type->complex);
 820                 break;
 821         case TYPE_IMAGINARY:
 822                 firm_type = create_imaginary_type(&type->imaginary);
 823                 break;
 824         case TYPE_FUNCTION:
 825                 firm_type = create_method_type(&type->function);
 826                 break;
 827         case TYPE_POINTER:
 828                 firm_type = create_pointer_type(&type->pointer);
 829                 break;
 830         case TYPE_ARRAY:
 831                 firm_type = create_array_type(&type->array);
 832                 break;
 833         case TYPE_COMPOUND_STRUCT:
 834                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 835                                                  false, COMPOUND_IS_STRUCT);
 836                 break;
 837         case TYPE_COMPOUND_UNION:
 838                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 839                                                  false, COMPOUND_IS_UNION);
 840                 break;
 841         case TYPE_ENUM:
 842                 firm_type = create_enum_type(&type->enumt);
 843                 break;
 844         case TYPE_BUILTIN:
 845                 firm_type = get_ir_type(type->builtin.real_type);
 846                 break;
 847         case TYPE_BITFIELD:
 848                 firm_type = create_bitfield_type(&type->bitfield);
 849                 break;
 850
 851         case TYPE_TYPEOF:
 852         case TYPE_TYPEDEF:
 853         case TYPE_INVALID:
 854                 break;
 855         }
 856         if (firm_type == NULL)
 857                 panic("unknown type found");
 858
 859         type->base.firm_type = firm_type;
 860         return firm_type;
 861 }
 862
 863 static inline ir_mode *get_ir_mode(type_t *type)
 864 {
 865         ir_type *irtype = get_ir_type(type);
 866
 867         /* firm doesn't report a mode for arrays somehow... */
 868         if (is_Array_type(irtype)) {
 869                 return mode_P_data;
 870         }
 871
 872         ir_mode *mode = get_type_mode(irtype);
 873         assert(mode != NULL);
 874         return mode;
 875 }
 876
 877 /** Names of the runtime functions. */
 878 static const struct {
 879         int        id;           /**< the rts id */
 880         int        n_res;        /**< number of return values */
 881         const char *name;        /**< the name of the rts function */
 882         int        n_params;     /**< number of parameters */
 883         unsigned   flags;        /**< language flags */
 884 } rts_data[] = {
 885         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 886         { rts_abort,      0, "abort",        0, _C89 },
 887         { rts_alloca,     1, "alloca",       1, _ALL },
 888         { rts_abs,        1, "abs",          1, _C89 },
 889         { rts_labs,       1, "labs",         1, _C89 },
 890         { rts_llabs,      1, "llabs",        1, _C99 },
 891         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 892
 893         { rts_fabs,       1, "fabs",         1, _C89 },
 894         { rts_sqrt,       1, "sqrt",         1, _C89 },
 895         { rts_cbrt,       1, "cbrt",         1, _C99 },
 896         { rts_exp,        1, "exp",          1, _C89 },
 897         { rts_exp2,       1, "exp2",         1, _C89 },
 898         { rts_exp10,      1, "exp10",        1, _GNUC },
 899         { rts_log,        1, "log",          1, _C89 },
 900         { rts_log2,       1, "log2",         1, _C89 },
 901         { rts_log10,      1, "log10",        1, _C89 },
 902         { rts_pow,        1, "pow",          2, _C89 },
 903         { rts_sin,        1, "sin",          1, _C89 },
 904         { rts_cos,        1, "cos",          1, _C89 },
 905         { rts_tan,        1, "tan",          1, _C89 },
 906         { rts_asin,       1, "asin",         1, _C89 },
 907         { rts_acos,       1, "acos",         1, _C89 },
 908         { rts_atan,       1, "atan",         1, _C89 },
 909         { rts_sinh,       1, "sinh",         1, _C89 },
 910         { rts_cosh,       1, "cosh",         1, _C89 },
 911         { rts_tanh,       1, "tanh",         1, _C89 },
 912
 913         { rts_fabsf,      1, "fabsf",        1, _C99 },
 914         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 915         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 916         { rts_expf,       1, "expf",         1, _C99 },
 917         { rts_exp2f,      1, "exp2f",        1, _C99 },
 918         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 919         { rts_logf,       1, "logf",         1, _C99 },
 920         { rts_log2f,      1, "log2f",        1, _C99 },
 921         { rts_log10f,     1, "log10f",       1, _C99 },
 922         { rts_powf,       1, "powf",         2, _C99 },
 923         { rts_sinf,       1, "sinf",         1, _C99 },
 924         { rts_cosf,       1, "cosf",         1, _C99 },
 925         { rts_tanf,       1, "tanf",         1, _C99 },
 926         { rts_asinf,      1, "asinf",        1, _C99 },
 927         { rts_acosf,      1, "acosf",        1, _C99 },
 928         { rts_atanf,      1, "atanf",        1, _C99 },
 929         { rts_sinhf,      1, "sinhf",        1, _C99 },
 930         { rts_coshf,      1, "coshf",        1, _C99 },
 931         { rts_tanhf,      1, "tanhf",        1, _C99 },
 932
 933         { rts_fabsl,      1, "fabsl",        1, _C99 },
 934         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 935         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 936         { rts_expl,       1, "expl",         1, _C99 },
 937         { rts_exp2l,      1, "exp2l",        1, _C99 },
 938         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 939         { rts_logl,       1, "logl",         1, _C99 },
 940         { rts_log2l,      1, "log2l",        1, _C99 },
 941         { rts_log10l,     1, "log10l",       1, _C99 },
 942         { rts_powl,       1, "powl",         2, _C99 },
 943         { rts_sinl,       1, "sinl",         1, _C99 },
 944         { rts_cosl,       1, "cosl",         1, _C99 },
 945         { rts_tanl,       1, "tanl",         1, _C99 },
 946         { rts_asinl,      1, "asinl",        1, _C99 },
 947         { rts_acosl,      1, "acosl",        1, _C99 },
 948         { rts_atanl,      1, "atanl",        1, _C99 },
 949         { rts_sinhl,      1, "sinhl",        1, _C99 },
 950         { rts_coshl,      1, "coshl",        1, _C99 },
 951         { rts_tanhl,      1, "tanhl",        1, _C99 },
 952
 953         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 954         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 955         { rts_strcmp,     1, "strcmp",       2, _C89 },
 956         { rts_strncmp,    1, "strncmp",      3, _C89 }
 957 };
 958
 959 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 960
 961 /**
 962  * Mangles an entity linker (ld) name for win32 usage.
 963  *
 964  * @param ent          the entity to be mangled
 965  * @param declaration  the declaration
 966  */
 967 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 968 {
 969         ident *id;
 970
 971         if (is_Method_type(get_entity_type(ent)))
 972                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 973         else {
 974                 /* always add an underscore in win32 */
 975                 id = mangle(id_underscore, get_entity_ident(ent));
 976         }
 977
 978         decl_modifiers_t decl_modifiers = declaration->modifiers;
 979         if (decl_modifiers & DM_DLLIMPORT) {
 980                 /* add prefix for imported symbols */
 981                 id = mangle(id_imp, id);
 982         }
 983         return id;
 984 }
 985
 986 /**
 987  * Mangles an entity linker (ld) name for Linux ELF usage.
 988  *
 989  * @param ent          the entity to be mangled
 990  * @param declaration  the declaration
 991  */
 992 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 993                                         declaration_t *declaration)
 994 {
 995         (void) declaration;
 996         return get_entity_ident(entity);
 997 }
 998
 999 /**
1000  * Mangles an entity linker (ld) name for Mach-O usage.
1001  *
1002  * @param ent          the entity to be mangled
1003  * @param declaration  the declaration
1004  */
1005 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1006 {
1007         (void) declaration;
1008         ident *id = mangle(id_underscore, get_entity_ident(ent));
1009         return id;
1010 }
1011
1012 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1013                                        declaration_t *declaration);
1014 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1015
1016 /**
1017  * Handle GNU attributes for entities
1018  *
1019  * @param ent   the entity
1020  * @param decl  the routine declaration
1021  */
1022 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1023 {
1024         if (decl->modifiers & DM_PURE) {
1025                 /* TRUE if the declaration includes the GNU
1026                    __attribute__((pure)) specifier. */
1027                 set_entity_additional_property(ent, mtp_property_pure);
1028         }
1029         if (decl->modifiers & DM_USED) {
1030                 /* TRUE if the declaration includes the GNU
1031                    __attribute__((used)) specifier. */
1032                 set_entity_stickyness(ent, stickyness_sticky);
1033         }
1034 }
1035
1036 /**
1037  * Creates an entity representing a function.
1038  *
1039  * @param declaration  the function declaration
1040  */
1041 static ir_entity *get_function_entity(declaration_t *declaration)
1042 {
1043         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
1044                 return declaration->v.entity;
1045         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1046
1047         symbol_t *symbol = declaration->symbol;
1048         ident    *id     = new_id_from_str(symbol->string);
1049
1050         ir_type  *global_type    = get_glob_type();
1051         ir_type  *ir_type_method = get_ir_type(declaration->type);
1052         assert(is_Method_type(ir_type_method));
1053
1054         /* already an entity defined? */
1055         ir_entity *entity = entitymap_get(&entitymap, symbol);
1056         if (entity != NULL) {
1057                 if (get_entity_visibility(entity) == visibility_external_allocated
1058                                 && declaration->init.statement != NULL) {
1059                         set_entity_visibility(entity, visibility_external_visible);
1060                 }
1061                 goto entity_created;
1062         }
1063
1064         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1065         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1066         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1067
1068         handle_gnu_attributes_ent(entity, declaration);
1069
1070         /* static inline             => local
1071          * extern inline             => local
1072          * inline without definition => local
1073          * inline with definition    => external_visible */
1074         storage_class_tag_t const storage_class = declaration->storage_class;
1075         bool                const is_inline     = declaration->is_inline;
1076         bool                const has_body      = declaration->init.statement != NULL;
1077         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1078                 set_entity_visibility(entity, visibility_external_visible);
1079         } else if (storage_class == STORAGE_CLASS_STATIC ||
1080                    (is_inline && has_body)) {
1081                 if (!has_body) {
1082                         /* this entity was declared, but is defined nowhere */
1083                         set_entity_peculiarity(entity, peculiarity_description);
1084                 }
1085                 set_entity_visibility(entity, visibility_local);
1086         } else if (has_body) {
1087                 set_entity_visibility(entity, visibility_external_visible);
1088         } else {
1089                 set_entity_visibility(entity, visibility_external_allocated);
1090         }
1091         set_entity_allocation(entity, allocation_static);
1092
1093         /* We should check for file scope here, but as long as we compile C only
1094            this is not needed. */
1095         if (! firm_opt.freestanding) {
1096                 /* check for a known runtime function */
1097                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1098                         if (id != rts_idents[i])
1099                                 continue;
1100
1101                         /* ignore those rts functions not necessary needed for current mode */
1102                         if ((c_mode & rts_data[i].flags) == 0)
1103                                 continue;
1104                         assert(rts_entities[rts_data[i].id] == NULL);
1105                         rts_entities[rts_data[i].id] = entity;
1106                 }
1107         }
1108
1109         entitymap_insert(&entitymap, symbol, entity);
1110
1111 entity_created:
1112         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1113         declaration->v.entity         = entity;
1114
1115         return entity;
1116 }
1117
1118 /**
1119  * Creates a Const node representing a constant.
1120  */
1121 static ir_node *const_to_firm(const const_expression_t *cnst)
1122 {
1123         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1124         ir_mode  *mode = get_ir_mode(cnst->base.type);
1125
1126         char    buf[128];
1127         tarval *tv;
1128         size_t  len;
1129         if (mode_is_float(mode)) {
1130                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1131         } else {
1132                 if (mode_is_signed(mode)) {
1133                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1134                 } else {
1135                         len = snprintf(buf, sizeof(buf), "%llu",
1136                                        (unsigned long long) cnst->v.int_value);
1137                 }
1138                 tv = new_tarval_from_str(buf, len, mode);
1139         }
1140
1141         return new_d_Const(dbgi, mode, tv);
1142 }
1143
1144 /**
1145  * Creates a Const node representing a character constant.
1146  */
1147 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1148 {
1149         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1150         ir_mode  *mode = get_ir_mode(cnst->base.type);
1151
1152         long long int v = 0;
1153         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1154                 if (char_is_signed) {
1155                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1156                 } else {
1157                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1158                 }
1159         }
1160         char    buf[128];
1161         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1162         tarval *tv = new_tarval_from_str(buf, len, mode);
1163
1164         return new_d_Const(dbgi, mode, tv);
1165 }
1166
1167 /**
1168  * Creates a Const node representing a wide character constant.
1169  */
1170 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1171 {
1172         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1173         ir_mode  *mode = get_ir_mode(cnst->base.type);
1174
1175         long long int v = cnst->v.wide_character.begin[0];
1176
1177         char    buf[128];
1178         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1179         tarval *tv = new_tarval_from_str(buf, len, mode);
1180
1181         return new_d_Const(dbgi, mode, tv);
1182 }
1183
1184 /**
1185  * Creates a SymConst for a given entity.
1186  *
1187  * @param dbgi    debug info
1188  * @param mode    the (reference) mode for the SymConst
1189  * @param entity  the entity
1190  */
1191 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1192                               ir_entity *entity)
1193 {
1194         assert(entity != NULL);
1195         union symconst_symbol sym;
1196         sym.entity_p = entity;
1197         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1198 }
1199
1200 /**
1201  * Creates a SymConst node representing a string constant.
1202  *
1203  * @param src_pos    the source position of the string constant
1204  * @param id_prefix  a prefix for the name of the generated string constant
1205  * @param value      the value of the string constant
1206  */
1207 static ir_node *string_to_firm(const source_position_t *const src_pos,
1208                                const char *const id_prefix,
1209                                const string_t *const value)
1210 {
1211         ir_type  *const global_type = get_glob_type();
1212         dbg_info *const dbgi        = get_dbg_info(src_pos);
1213         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1214                                                        ir_type_const_char, dbgi);
1215
1216         ident     *const id     = id_unique(id_prefix);
1217         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1218         set_entity_ld_ident(entity, id);
1219         set_entity_variability(entity, variability_constant);
1220         set_entity_allocation(entity, allocation_static);
1221
1222         ir_type *const elem_type = ir_type_const_char;
1223         ir_mode *const mode      = get_type_mode(elem_type);
1224
1225         const char* const string = value->begin;
1226         const size_t      slen   = value->size;
1227
1228         set_array_lower_bound_int(type, 0, 0);
1229         set_array_upper_bound_int(type, 0, slen);
1230         set_type_size_bytes(type, slen);
1231         set_type_state(type, layout_fixed);
1232
1233         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1234         for(size_t i = 0; i < slen; ++i) {
1235                 tvs[i] = new_tarval_from_long(string[i], mode);
1236         }
1237
1238         set_array_entity_values(entity, tvs, slen);
1239         free(tvs);
1240
1241         return create_symconst(dbgi, mode_P_data, entity);
1242 }
1243
1244 /**
1245  * Creates a SymConst node representing a string literal.
1246  *
1247  * @param literal   the string literal
1248  */
1249 static ir_node *string_literal_to_firm(
1250                 const string_literal_expression_t* literal)
1251 {
1252         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1253                               &literal->value);
1254 }
1255
1256 /**
1257  * Creates a SymConst node representing a wide string literal.
1258  *
1259  * @param literal   the wide string literal
1260  */
1261 static ir_node *wide_string_literal_to_firm(
1262         const wide_string_literal_expression_t* const literal)
1263 {
1264         ir_type *const global_type = get_glob_type();
1265         ir_type *const elem_type   = ir_type_wchar_t;
1266         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1267         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1268                                                     elem_type, dbgi);
1269
1270         ident     *const id     = id_unique("Lstr.%u");
1271         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1272         set_entity_ld_ident(entity, id);
1273         set_entity_variability(entity, variability_constant);
1274         set_entity_allocation(entity, allocation_static);
1275
1276         ir_mode *const mode      = get_type_mode(elem_type);
1277
1278         const wchar_rep_t *const string = literal->value.begin;
1279         const size_t             slen   = literal->value.size;
1280
1281         set_array_lower_bound_int(type, 0, 0);
1282         set_array_upper_bound_int(type, 0, slen);
1283         set_type_size_bytes(type, slen);
1284         set_type_state(type, layout_fixed);
1285
1286         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1287         for(size_t i = 0; i < slen; ++i) {
1288                 tvs[i] = new_tarval_from_long(string[i], mode);
1289         }
1290
1291         set_array_entity_values(entity, tvs, slen);
1292         free(tvs);
1293
1294         return create_symconst(dbgi, mode_P_data, entity);
1295 }
1296
1297 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1298                                       ir_node *const addr)
1299 {
1300         ir_type *irtype = get_ir_type(type);
1301         if (is_compound_type(irtype)
1302                         || is_Method_type(irtype)
1303                         || is_Array_type(irtype)) {
1304                 return addr;
1305         }
1306
1307         ir_mode *const mode     = get_type_mode(irtype);
1308         ir_node *const memory   = get_store();
1309         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1310         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1311         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1312
1313         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1314                 set_Load_volatility(load, volatility_is_volatile);
1315         }
1316
1317         set_store(load_mem);
1318         return load_res;
1319 }
1320
1321 /**
1322  * Creates a strict Conv if neccessary.
1323  */
1324 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1325 {
1326         ir_mode *mode = get_irn_mode(node);
1327
1328         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1329                 return node;
1330         if (!mode_is_float(mode))
1331                 return node;
1332
1333         /* check if there is already a Conv */
1334         if (is_Conv(node)) {
1335                 /* convert it into a strict Conv */
1336                 set_Conv_strict(node, 1);
1337                 return node;
1338         }
1339
1340         /* otherwise create a new one */
1341         return new_d_strictConv(dbgi, node, mode);
1342 }
1343
1344 static ir_node *get_global_var_address(dbg_info *const dbgi,
1345                                        const declaration_t *const decl)
1346 {
1347         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1348
1349         ir_entity *const entity = decl->v.entity;
1350         switch ((storage_class_tag_t)decl->storage_class) {
1351                 case STORAGE_CLASS_THREAD:
1352                 case STORAGE_CLASS_THREAD_EXTERN:
1353                 case STORAGE_CLASS_THREAD_STATIC: {
1354                         ir_node *const no_mem = new_NoMem();
1355                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1356                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1357                 }
1358
1359                 default:
1360                         return create_symconst(dbgi, mode_P_data, entity);
1361         }
1362 }
1363
1364 /**
1365  * Returns the correct base address depending on whether it is a parameter or a
1366  * normal local variable.
1367  */
1368 static ir_node *get_local_frame(ir_entity *const ent)
1369 {
1370         ir_graph      *const irg   = current_ir_graph;
1371         const ir_type *const owner = get_entity_owner(ent);
1372         if (owner == get_irg_frame_type(irg)) {
1373                 return get_irg_frame(irg);
1374         } else {
1375                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1376                 return get_irg_value_param_base(irg);
1377         }
1378 }
1379
1380 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1381 {
1382         ir_mode *value_mode = get_irn_mode(value);
1383
1384         if (value_mode == dest_mode || is_Bad(value))
1385                 return value;
1386
1387         if (dest_mode == mode_b) {
1388                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1389                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1390                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1391                 return proj;
1392         }
1393
1394         return new_d_Conv(dbgi, value, dest_mode);
1395 }
1396
1397 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1398 {
1399         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1400         declaration_t *declaration = ref->declaration;
1401         type_t        *type        = skip_typeref(declaration->type);
1402
1403         /* make sure the type is constructed */
1404         (void) get_ir_type(type);
1405
1406         switch((declaration_kind_t) declaration->declaration_kind) {
1407         case DECLARATION_KIND_TYPE:
1408         case DECLARATION_KIND_UNKNOWN:
1409                 break;
1410
1411         case DECLARATION_KIND_ENUM_ENTRY: {
1412                 ir_mode *const mode = get_ir_mode(type);
1413                 return new_Const(mode, declaration->v.enum_val);
1414         }
1415
1416         case DECLARATION_KIND_LOCAL_VARIABLE: {
1417                 ir_mode *const mode = get_ir_mode(type);
1418                 return get_value(declaration->v.value_number, mode);
1419         }
1420         case DECLARATION_KIND_FUNCTION: {
1421                 ir_mode *const mode = get_ir_mode(type);
1422                 return create_symconst(dbgi, mode, declaration->v.entity);
1423         }
1424         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1425                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1426                 return deref_address(dbgi, declaration->type, addr);
1427         }
1428
1429         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1430                 ir_entity *entity = declaration->v.entity;
1431                 ir_node   *frame  = get_local_frame(entity);
1432                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1433                 return deref_address(dbgi, declaration->type, sel);
1434         }
1435
1436         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1437                 return declaration->v.vla_base;
1438
1439         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1440         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1441         case DECLARATION_KIND_COMPOUND_MEMBER:
1442         case DECLARATION_KIND_LABEL_BLOCK:
1443                 panic("not implemented reference type");
1444         }
1445
1446         panic("reference to declaration with unknown type found");
1447 }
1448
1449 static ir_node *reference_addr(const reference_expression_t *ref)
1450 {
1451         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1452         declaration_t *declaration = ref->declaration;
1453
1454         switch((declaration_kind_t) declaration->declaration_kind) {
1455         case DECLARATION_KIND_TYPE:
1456         case DECLARATION_KIND_UNKNOWN:
1457                 break;
1458         case DECLARATION_KIND_LOCAL_VARIABLE:
1459                 /* you can store to a local variable (so we don't panic but return NULL
1460                  * as an indicator for no real address) */
1461                 return NULL;
1462         case DECLARATION_KIND_FUNCTION: {
1463                 type_t *const  type = skip_typeref(ref->base.type);
1464                 ir_mode *const mode = get_ir_mode(type);
1465                 return create_symconst(dbgi, mode, declaration->v.entity);
1466         }
1467         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1468                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1469                 return addr;
1470         }
1471         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1472                 ir_entity *entity = declaration->v.entity;
1473                 ir_node   *frame  = get_local_frame(entity);
1474                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1475
1476                 return sel;
1477         }
1478
1479         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1480                 return declaration->v.vla_base;
1481
1482         case DECLARATION_KIND_ENUM_ENTRY:
1483                 panic("trying to reference enum entry");
1484
1485         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1486         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1487         case DECLARATION_KIND_COMPOUND_MEMBER:
1488         case DECLARATION_KIND_LABEL_BLOCK:
1489                 panic("not implemented reference type");
1490         }
1491
1492         panic("reference to declaration with unknown type found");
1493 }
1494
1495 /**
1496  * Transform calls to builtin functions.
1497  */
1498 static ir_node *process_builtin_call(const call_expression_t *call)
1499 {
1500         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1501
1502         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1503         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1504
1505         type_t *type = skip_typeref(builtin->base.type);
1506         assert(is_type_pointer(type));
1507
1508         type_t   *function_type = skip_typeref(type->pointer.points_to);
1509         symbol_t *symbol        = builtin->symbol;
1510
1511         switch(symbol->ID) {
1512         case T___builtin_alloca: {
1513                 if (call->arguments == NULL || call->arguments->next != NULL) {
1514                         panic("invalid number of parameters on __builtin_alloca");
1515                 }
1516                 expression_t *argument = call->arguments->expression;
1517                 ir_node      *size     = expression_to_firm(argument);
1518
1519                 ir_node *store  = get_store();
1520                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1521                                               stack_alloc);
1522                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1523                 set_store(proj_m);
1524                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1525
1526                 return res;
1527         }
1528         case T___builtin_huge_val: {
1529                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1530                 tarval  *tv   = get_mode_infinite(mode);
1531                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1532                 return   res;
1533         }
1534         case T___builtin_nan:
1535         case T___builtin_nanf:
1536         case T___builtin_nand: {
1537                 /* Ignore string for now... */
1538                 assert(is_type_function(function_type));
1539                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1540                 tarval  *tv   = get_mode_NAN(mode);
1541                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1542                 return res;
1543         }
1544         case T___builtin_va_end:
1545                 return NULL;
1546         default:
1547                 panic("Unsupported builtin found\n");
1548         }
1549 }
1550
1551 /**
1552  * Transform a call expression.
1553  * Handles some special cases, like alloca() calls, which must be resolved
1554  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1555  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1556  * handled right...
1557  */
1558 static ir_node *call_expression_to_firm(const call_expression_t *call)
1559 {
1560         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1561         assert(get_cur_block() != NULL);
1562
1563         expression_t *function = call->function;
1564         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1565                 return process_builtin_call(call);
1566         }
1567         if (function->kind == EXPR_REFERENCE) {
1568                 const reference_expression_t *ref = &function->reference;
1569                 declaration_t *declaration = ref->declaration;
1570
1571                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1572                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1573                                 /* handle alloca() call */
1574                                 expression_t *argument = call->arguments->expression;
1575                                 ir_node      *size     = expression_to_firm(argument);
1576
1577                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1578
1579                                 ir_node *store  = get_store();
1580                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1581                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1582                                               stack_alloc);
1583                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1584                                 set_store(proj_m);
1585                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1586
1587                                 return res;
1588                         }
1589                 }
1590         }
1591         ir_node *callee = expression_to_firm(function);
1592
1593         type_t *type = skip_typeref(function->base.type);
1594         assert(is_type_pointer(type));
1595         pointer_type_t *pointer_type = &type->pointer;
1596         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1597         assert(is_type_function(points_to));
1598         function_type_t *function_type = &points_to->function;
1599
1600         int      n_parameters = 0;
1601         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1602         ir_type *new_method_type = NULL;
1603         if (function_type->variadic || function_type->unspecified_parameters) {
1604                 const call_argument_t *argument = call->arguments;
1605                 for( ; argument != NULL; argument = argument->next) {
1606                         ++n_parameters;
1607                 }
1608
1609                 /* we need to construct a new method type matching the call
1610                  * arguments... */
1611                 int n_res       = get_method_n_ress(ir_method_type);
1612                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1613                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1614                                                     n_parameters, n_res, dbgi);
1615                 set_method_calling_convention(new_method_type,
1616                                get_method_calling_convention(ir_method_type));
1617                 set_method_additional_properties(new_method_type,
1618                                get_method_additional_properties(ir_method_type));
1619                 set_method_variadicity(new_method_type,
1620                                        get_method_variadicity(ir_method_type));
1621
1622                 for(int i = 0; i < n_res; ++i) {
1623                         set_method_res_type(new_method_type, i,
1624                                             get_method_res_type(ir_method_type, i));
1625                 }
1626                 argument = call->arguments;
1627                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1628                         expression_t *expression = argument->expression;
1629                         ir_type      *irtype     = get_ir_type(expression->base.type);
1630                         set_method_param_type(new_method_type, i, irtype);
1631                 }
1632                 ir_method_type = new_method_type;
1633         } else {
1634                 n_parameters = get_method_n_params(ir_method_type);
1635         }
1636
1637         ir_node *in[n_parameters];
1638
1639         const call_argument_t *argument = call->arguments;
1640         for(int n = 0; n < n_parameters; ++n) {
1641                 expression_t *expression = argument->expression;
1642                 ir_node      *arg_node   = expression_to_firm(expression);
1643
1644                 arg_node = do_strict_conv(dbgi, arg_node);
1645
1646                 in[n] = arg_node;
1647
1648                 argument = argument->next;
1649         }
1650
1651         ir_node  *store = get_store();
1652         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1653                                      ir_method_type);
1654         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1655         set_store(mem);
1656
1657         type_t  *return_type = skip_typeref(function_type->return_type);
1658         ir_node *result      = NULL;
1659
1660         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1661                 ir_mode *mode;
1662                 if (is_type_scalar(return_type)) {
1663                         mode = get_ir_mode(return_type);
1664                 } else {
1665                         mode = mode_P_data;
1666                 }
1667                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1668                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1669         }
1670
1671         return result;
1672 }
1673
1674 static void statement_to_firm(statement_t *statement);
1675 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1676
1677 static ir_node *expression_to_addr(const expression_t *expression);
1678 static void create_condition_evaluation(const expression_t *expression,
1679                                         ir_node *true_block,
1680                                         ir_node *false_block);
1681
1682 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1683                          ir_node *value)
1684 {
1685         value = do_strict_conv(dbgi, value);
1686
1687         ir_node *memory = get_store();
1688
1689         if (is_type_scalar(type)) {
1690                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1691                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1692                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1693                         set_Store_volatility(store, volatility_is_volatile);
1694                 set_store(store_mem);
1695         } else {
1696                 ir_type *irtype    = get_ir_type(type);
1697                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1698                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1699                 set_store(copyb_mem);
1700         }
1701 }
1702
1703 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1704 {
1705         tarval *all_one   = get_mode_all_one(mode);
1706         int     mode_size = get_mode_size_bits(mode);
1707
1708         assert(offset >= 0 && size >= 0);
1709         assert(offset + size <= mode_size);
1710         if (size == mode_size) {
1711                 return all_one;
1712         }
1713
1714         long    shiftr    = get_mode_size_bits(mode) - size;
1715         long    shiftl    = offset;
1716         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1717         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1718         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1719         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1720
1721         return mask1;
1722 }
1723
1724 static void bitfield_store_to_firm(const select_expression_t *expression,
1725                                    ir_node *addr, ir_node *value)
1726 {
1727         type_t       *type   = expression->base.type;
1728         ir_mode      *mode   = get_ir_mode(type);
1729
1730         assert(get_irn_mode(value) == mode || is_Bad(value));
1731
1732         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1733
1734         /* kill upper bits of value and shift to right position */
1735         ir_entity *entity       = expression->compound_entry->v.entity;
1736         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1737         ir_type   *entity_type  = get_entity_type(entity);
1738         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1739
1740         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1741         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1742         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1743         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1744         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1745         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1746
1747         /* load current value */
1748         ir_node  *mem             = get_store();
1749         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1750         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1751         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1752         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1753         tarval   *inv_mask        = tarval_not(shift_mask);
1754         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1755         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1756
1757         /* construct new value and store */
1758         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1759         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1760         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1761         set_store(store_mem);
1762
1763         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1764                 set_Load_volatility(load, volatility_is_volatile);
1765                 set_Store_volatility(store, volatility_is_volatile);
1766         }
1767 }
1768
1769 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1770                 ir_node *addr)
1771 {
1772         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1773         type_t   *type     = expression->base.type;
1774         ir_mode  *mode     = get_ir_mode(type);
1775         ir_node  *mem      = get_store();
1776         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1777         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1778         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1779
1780         load_res           = create_conv(dbgi, load_res, mode_int);
1781
1782         set_store(load_mem);
1783
1784         /* kill upper bits */
1785         ir_entity *entity       = expression->compound_entry->v.entity;
1786         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1787         ir_type   *entity_type  = get_entity_type(entity);
1788         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1789         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1790         assert(shift_bitsl >= 0);
1791         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1792         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1793         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1794
1795         long       shift_bitsr  = bitoffset + shift_bitsl;
1796         assert(shift_bitsr <= (long) machine_size);
1797         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1798         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1799         ir_node   *shiftr;
1800         if (mode_is_signed(mode)) {
1801                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1802         } else {
1803                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1804         }
1805
1806         return create_conv(dbgi, shiftr, mode);
1807 }
1808
1809 static void set_value_for_expression_addr(const expression_t *expression,
1810                                           ir_node *value, ir_node *addr)
1811 {
1812         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1813         value          = do_strict_conv(dbgi, value);
1814
1815         if (expression->kind == EXPR_REFERENCE) {
1816                 const reference_expression_t *ref = &expression->reference;
1817
1818                 declaration_t *declaration = ref->declaration;
1819                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1820                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1821                         set_value(declaration->v.value_number, value);
1822                         return;
1823                 }
1824         }
1825
1826         if (addr == NULL)
1827                 addr = expression_to_addr(expression);
1828
1829         type_t *type = skip_typeref(expression->base.type);
1830
1831         if (expression->kind == EXPR_SELECT) {
1832                 const select_expression_t *select = &expression->select;
1833
1834                 declaration_t *declaration = select->compound_entry;
1835                 if (declaration->type->kind == TYPE_BITFIELD) {
1836                         bitfield_store_to_firm(select, addr, value);
1837                         return;
1838                 }
1839         }
1840
1841         assign_value(dbgi, addr, type, value);
1842 }
1843
1844 static void set_value_for_expression(const expression_t *expression,
1845                                      ir_node *value)
1846 {
1847         set_value_for_expression_addr(expression, value, NULL);
1848 }
1849
1850 static ir_node *get_value_from_lvalue(const expression_t *expression,
1851                                       ir_node *addr)
1852 {
1853         if (expression->kind == EXPR_REFERENCE) {
1854                 const reference_expression_t *ref = &expression->reference;
1855
1856                 declaration_t *declaration = ref->declaration;
1857                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1858                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1859                         assert(addr == NULL);
1860                         ir_mode *mode = get_ir_mode(expression->base.type);
1861                         return get_value(declaration->v.value_number, mode);
1862                 }
1863         }
1864
1865         assert(addr != NULL);
1866         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1867
1868         ir_node *value;
1869         if (expression->kind == EXPR_SELECT &&
1870             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1871                 value = bitfield_extract_to_firm(&expression->select, addr);
1872         } else {
1873                 value = deref_address(dbgi, expression->base.type, addr);
1874         }
1875
1876         return value;
1877 }
1878
1879
1880 static ir_node *create_incdec(const unary_expression_t *expression)
1881 {
1882         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1883         const expression_t *value_expr = expression->value;
1884         ir_node            *addr       = expression_to_addr(value_expr);
1885         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1886
1887         type_t  *type = skip_typeref(expression->base.type);
1888         ir_mode *mode = get_ir_mode(expression->base.type);
1889
1890         ir_node *offset;
1891         if (is_type_pointer(type)) {
1892                 pointer_type_t *pointer_type = &type->pointer;
1893                 offset                       = get_type_size(pointer_type->points_to);
1894         } else {
1895                 assert(is_type_arithmetic(type));
1896                 offset = new_Const(mode, get_mode_one(mode));
1897         }
1898
1899         ir_node *result;
1900         ir_node *store_value;
1901         switch(expression->base.kind) {
1902         case EXPR_UNARY_POSTFIX_INCREMENT:
1903                 result      = value;
1904                 store_value = new_d_Add(dbgi, value, offset, mode);
1905                 break;
1906         case EXPR_UNARY_POSTFIX_DECREMENT:
1907                 result      = value;
1908                 store_value = new_d_Sub(dbgi, value, offset, mode);
1909                 break;
1910         case EXPR_UNARY_PREFIX_INCREMENT:
1911                 result      = new_d_Add(dbgi, value, offset, mode);
1912                 store_value = result;
1913                 break;
1914         case EXPR_UNARY_PREFIX_DECREMENT:
1915                 result      = new_d_Sub(dbgi, value, offset, mode);
1916                 store_value = result;
1917                 break;
1918         default:
1919                 panic("no incdec expr in create_incdec");
1920         }
1921
1922         set_value_for_expression_addr(value_expr, store_value, addr);
1923
1924         return result;
1925 }
1926
1927 static bool is_local_variable(expression_t *expression)
1928 {
1929         if (expression->kind != EXPR_REFERENCE)
1930                 return false;
1931         reference_expression_t *ref_expr    = &expression->reference;
1932         declaration_t          *declaration = ref_expr->declaration;
1933         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1934 }
1935
1936 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1937 {
1938         switch(kind) {
1939         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1940         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1941         case EXPR_BINARY_NOTEQUAL:
1942                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1943         case EXPR_BINARY_ISLESS:
1944         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1945         case EXPR_BINARY_ISLESSEQUAL:
1946         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1947         case EXPR_BINARY_ISGREATER:
1948         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1949         case EXPR_BINARY_ISGREATEREQUAL:
1950         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1951         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1952
1953         default:
1954                 break;
1955         }
1956         panic("trying to get pn_Cmp from non-comparison binexpr type");
1957 }
1958
1959 /**
1960  * Handle the assume optimizer hint: check if a Confirm
1961  * node can be created.
1962  *
1963  * @param dbi    debug info
1964  * @param expr   the IL assume expression
1965  *
1966  * we support here only some simple cases:
1967  *  - var rel const
1968  *  - const rel val
1969  *  - var rel var
1970  */
1971 static ir_node *handle_assume_compare(dbg_info *dbi,
1972                                       const binary_expression_t *expression)
1973 {
1974         expression_t  *op1 = expression->left;
1975         expression_t  *op2 = expression->right;
1976         declaration_t *var2, *var = NULL;
1977         ir_node       *res = NULL;
1978         pn_Cmp         cmp_val;
1979
1980         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1981
1982         if (is_local_variable(op1) && is_local_variable(op2)) {
1983         var  = op1->reference.declaration;
1984             var2 = op2->reference.declaration;
1985
1986                 type_t  *const type = skip_typeref(var->type);
1987                 ir_mode *const mode = get_ir_mode(type);
1988
1989                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1990                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1991
1992                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1993                 set_value(var2->v.value_number, res);
1994
1995                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1996                 set_value(var->v.value_number, res);
1997
1998                 return res;
1999         }
2000
2001         expression_t *con;
2002         if (is_local_variable(op1) && is_constant_expression(op2)) {
2003                 var = op1->reference.declaration;
2004                 con = op2;
2005         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2006                 cmp_val = get_inversed_pnc(cmp_val);
2007                 var = op2->reference.declaration;
2008                 con = op1;
2009         }
2010
2011         if (var != NULL) {
2012                 type_t  *const type = skip_typeref(var->type);
2013                 ir_mode *const mode = get_ir_mode(type);
2014
2015                 res = get_value(var->v.value_number, mode);
2016                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2017                 set_value(var->v.value_number, res);
2018         }
2019         return res;
2020 }
2021
2022 /**
2023  * Handle the assume optimizer hint.
2024  *
2025  * @param dbi    debug info
2026  * @param expr   the IL assume expression
2027  */
2028 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2029         switch(expression->kind) {
2030         case EXPR_BINARY_EQUAL:
2031         case EXPR_BINARY_NOTEQUAL:
2032         case EXPR_BINARY_LESS:
2033         case EXPR_BINARY_LESSEQUAL:
2034         case EXPR_BINARY_GREATER:
2035         case EXPR_BINARY_GREATEREQUAL:
2036                 return handle_assume_compare(dbi, &expression->binary);
2037         default:
2038                 return NULL;
2039         }
2040 }
2041
2042 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2043 {
2044         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2045         type_t   *type = skip_typeref(expression->base.type);
2046
2047         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2048                 return expression_to_addr(expression->value);
2049
2050         const expression_t *value = expression->value;
2051
2052         switch(expression->base.kind) {
2053         case EXPR_UNARY_NEGATE: {
2054                 ir_node *value_node = expression_to_firm(value);
2055                 ir_mode *mode = get_ir_mode(type);
2056                 return new_d_Minus(dbgi, value_node, mode);
2057         }
2058         case EXPR_UNARY_PLUS:
2059                 return expression_to_firm(value);
2060         case EXPR_UNARY_BITWISE_NEGATE: {
2061                 ir_node *value_node = expression_to_firm(value);
2062                 ir_mode *mode = get_ir_mode(type);
2063                 return new_d_Not(dbgi, value_node, mode);
2064         }
2065         case EXPR_UNARY_NOT: {
2066                 ir_node *value_node = _expression_to_firm(value);
2067                 value_node          = create_conv(dbgi, value_node, mode_b);
2068                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2069                 return res;
2070         }
2071         case EXPR_UNARY_DEREFERENCE: {
2072                 ir_node *value_node = expression_to_firm(value);
2073                 type_t  *value_type = skip_typeref(value->base.type);
2074                 assert(is_type_pointer(value_type));
2075                 type_t  *points_to  = value_type->pointer.points_to;
2076                 return deref_address(dbgi, points_to, value_node);
2077         }
2078         case EXPR_UNARY_POSTFIX_INCREMENT:
2079         case EXPR_UNARY_POSTFIX_DECREMENT:
2080         case EXPR_UNARY_PREFIX_INCREMENT:
2081         case EXPR_UNARY_PREFIX_DECREMENT:
2082                 return create_incdec(expression);
2083         case EXPR_UNARY_CAST: {
2084                 ir_node *value_node = expression_to_firm(value);
2085                 if (is_type_scalar(type)) {
2086                         ir_mode *mode = get_ir_mode(type);
2087                         ir_node *node = create_conv(dbgi, value_node, mode);
2088                         node = do_strict_conv(dbgi, node);
2089                         return node;
2090                 } else {
2091                         /* make sure firm type is constructed */
2092                         (void) get_ir_type(type);
2093                         return value_node;
2094                 }
2095         }
2096         case EXPR_UNARY_CAST_IMPLICIT: {
2097                 ir_node *value_node = expression_to_firm(value);
2098                 if (is_type_scalar(type)) {
2099                         ir_mode *mode = get_ir_mode(type);
2100                         return create_conv(dbgi, value_node, mode);
2101                 } else {
2102                         return value_node;
2103                 }
2104         }
2105         case EXPR_UNARY_ASSUME:
2106                 if (firm_opt.confirm)
2107                         return handle_assume(dbgi, value);
2108                 else
2109                         return NULL;
2110
2111         default:
2112                 break;
2113         }
2114         panic("invalid UNEXPR type found");
2115 }
2116
2117 /**
2118  * produces a 0/1 depending of the value of a mode_b node
2119  */
2120 static ir_node *produce_condition_result(const expression_t *expression,
2121                                          dbg_info *dbgi)
2122 {
2123         ir_mode *mode      = get_ir_mode(expression->base.type);
2124         ir_node *cur_block = get_cur_block();
2125
2126         ir_node *one_block = new_immBlock();
2127         ir_node *one       = new_Const(mode, get_mode_one(mode));
2128         ir_node *jmp_one   = new_d_Jmp(dbgi);
2129
2130         ir_node *zero_block = new_immBlock();
2131         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2132         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2133
2134         set_cur_block(cur_block);
2135         create_condition_evaluation(expression, one_block, zero_block);
2136         mature_immBlock(one_block);
2137         mature_immBlock(zero_block);
2138
2139         ir_node *common_block = new_immBlock();
2140         add_immBlock_pred(common_block, jmp_one);
2141         add_immBlock_pred(common_block, jmp_zero);
2142         mature_immBlock(common_block);
2143
2144         ir_node *in[2] = { one, zero };
2145         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2146
2147         return val;
2148 }
2149
2150 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2151                 ir_node *value, type_t *type)
2152 {
2153         pointer_type_t *const pointer_type = &type->pointer;
2154         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2155         unsigned              elem_size    = get_type_size_const(points_to);
2156
2157         /* gcc extension */
2158         if (elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) {
2159                 elem_size = 1;
2160         }
2161
2162         assert(elem_size >= 1);
2163         if (elem_size == 1)
2164                 return value;
2165
2166         value = create_conv(dbgi, value, mode_int);
2167         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2168         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2169         return mul;
2170 }
2171
2172 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2173                           ir_node *left, ir_node *right)
2174 {
2175         ir_mode  *mode;
2176         type_t   *type_left  = skip_typeref(expression->left->base.type);
2177         type_t   *type_right = skip_typeref(expression->right->base.type);
2178
2179         expression_kind_t kind = expression->base.kind;
2180
2181         switch (kind) {
2182         case EXPR_BINARY_SHIFTLEFT:
2183         case EXPR_BINARY_SHIFTRIGHT:
2184         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2185         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2186                 mode  = get_irn_mode(left);
2187                 right = create_conv(dbgi, right, mode_uint);
2188                 break;
2189
2190         case EXPR_BINARY_SUB:
2191                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2192                         const pointer_type_t *const ptr_type = &type_left->pointer;
2193
2194                         mode = get_ir_mode(expression->base.type);
2195                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2196                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2197                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2198                         ir_node *const no_mem    = new_NoMem();
2199                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2200                                                                                                    mode, op_pin_state_floats);
2201                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2202                 }
2203                 /* fallthrough */
2204         case EXPR_BINARY_SUB_ASSIGN:
2205                 if (is_type_pointer(type_left)) {
2206                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2207                         mode  = get_ir_mode(type_left);
2208                         break;
2209                 }
2210                 goto normal_node;
2211
2212         case EXPR_BINARY_ADD:
2213         case EXPR_BINARY_ADD_ASSIGN:
2214                 if (is_type_pointer(type_left)) {
2215                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2216                         mode  = get_ir_mode(type_left);
2217                         break;
2218                 } else if (is_type_pointer(type_right)) {
2219                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2220                         mode  = get_ir_mode(type_right);
2221                         break;
2222                 }
2223                 goto normal_node;
2224
2225         default:
2226 normal_node:
2227                 mode = get_irn_mode(right);
2228                 left = create_conv(dbgi, left, mode);
2229                 break;
2230         }
2231
2232         switch (kind) {
2233         case EXPR_BINARY_ADD_ASSIGN:
2234         case EXPR_BINARY_ADD:
2235                 return new_d_Add(dbgi, left, right, mode);
2236         case EXPR_BINARY_SUB_ASSIGN:
2237         case EXPR_BINARY_SUB:
2238                 return new_d_Sub(dbgi, left, right, mode);
2239         case EXPR_BINARY_MUL_ASSIGN:
2240         case EXPR_BINARY_MUL:
2241                 return new_d_Mul(dbgi, left, right, mode);
2242         case EXPR_BINARY_BITWISE_AND:
2243         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2244                 return new_d_And(dbgi, left, right, mode);
2245         case EXPR_BINARY_BITWISE_OR:
2246         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2247                 return new_d_Or(dbgi, left, right, mode);
2248         case EXPR_BINARY_BITWISE_XOR:
2249         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2250                 return new_d_Eor(dbgi, left, right, mode);
2251         case EXPR_BINARY_SHIFTLEFT:
2252         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2253                 return new_d_Shl(dbgi, left, right, mode);
2254         case EXPR_BINARY_SHIFTRIGHT:
2255         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2256                 if (mode_is_signed(mode)) {
2257                         return new_d_Shrs(dbgi, left, right, mode);
2258                 } else {
2259                         return new_d_Shr(dbgi, left, right, mode);
2260                 }
2261         case EXPR_BINARY_DIV:
2262         case EXPR_BINARY_DIV_ASSIGN: {
2263                 ir_node *pin = new_Pin(new_NoMem());
2264                 ir_node *op;
2265                 ir_node *res;
2266                 if (mode_is_float(mode)) {
2267                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2268                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2269                 } else {
2270                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2271                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2272                 }
2273                 return res;
2274         }
2275         case EXPR_BINARY_MOD:
2276         case EXPR_BINARY_MOD_ASSIGN: {
2277                 ir_node *pin = new_Pin(new_NoMem());
2278                 assert(!mode_is_float(mode));
2279                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2280                                          op_pin_state_floats);
2281                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2282                 return res;
2283         }
2284         default:
2285                 panic("unexpected expression kind");
2286         }
2287 }
2288
2289 static ir_node *create_lazy_op(const binary_expression_t *expression)
2290 {
2291         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2292         type_t   *type = expression->base.type;
2293         ir_mode  *mode = get_ir_mode(type);
2294
2295         if (is_constant_expression(expression->left)) {
2296                 long val = fold_constant(expression->left);
2297                 expression_kind_t ekind = expression->base.kind;
2298                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
2299                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2300                         return expression_to_firm(expression->right);
2301                 } else {
2302                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
2303                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
2304                         return new_Const(mode, get_mode_one(mode));
2305                 }
2306         }
2307
2308         return produce_condition_result((const expression_t*) expression, dbgi);
2309 }
2310
2311 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2312                                             ir_node *right, ir_mode *mode);
2313
2314 static ir_node *create_assign_binop(const binary_expression_t *expression)
2315 {
2316         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2317         const expression_t *left_expr = expression->left;
2318         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2319         ir_node            *left_addr = expression_to_addr(left_expr);
2320         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2321         ir_node            *right     = expression_to_firm(expression->right);
2322         ir_node            *result    = create_op(dbgi, expression, left, right);
2323
2324         result = create_conv(dbgi, result, left_mode);
2325         result = do_strict_conv(dbgi, result);
2326
2327         set_value_for_expression_addr(left_expr, result, left_addr);
2328
2329         return result;
2330 }
2331
2332 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2333 {
2334         expression_kind_t kind = expression->base.kind;
2335
2336         switch(kind) {
2337         case EXPR_BINARY_EQUAL:
2338         case EXPR_BINARY_NOTEQUAL:
2339         case EXPR_BINARY_LESS:
2340         case EXPR_BINARY_LESSEQUAL:
2341         case EXPR_BINARY_GREATER:
2342         case EXPR_BINARY_GREATEREQUAL:
2343         case EXPR_BINARY_ISGREATER:
2344         case EXPR_BINARY_ISGREATEREQUAL:
2345         case EXPR_BINARY_ISLESS:
2346         case EXPR_BINARY_ISLESSEQUAL:
2347         case EXPR_BINARY_ISLESSGREATER:
2348         case EXPR_BINARY_ISUNORDERED: {
2349                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2350                 ir_node *left  = expression_to_firm(expression->left);
2351                 ir_node *right = expression_to_firm(expression->right);
2352                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2353                 long     pnc   = get_pnc(kind, expression->left->base.type);
2354                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2355                 return proj;
2356         }
2357         case EXPR_BINARY_ASSIGN: {
2358                 ir_node *addr  = expression_to_addr(expression->left);
2359                 ir_node *right = expression_to_firm(expression->right);
2360                 set_value_for_expression_addr(expression->left, right, addr);
2361
2362                 return right;
2363         }
2364         case EXPR_BINARY_ADD:
2365         case EXPR_BINARY_SUB:
2366         case EXPR_BINARY_MUL:
2367         case EXPR_BINARY_DIV:
2368         case EXPR_BINARY_MOD:
2369         case EXPR_BINARY_BITWISE_AND:
2370         case EXPR_BINARY_BITWISE_OR:
2371         case EXPR_BINARY_BITWISE_XOR:
2372         case EXPR_BINARY_SHIFTLEFT:
2373         case EXPR_BINARY_SHIFTRIGHT:
2374         {
2375                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2376                 ir_node  *left  = expression_to_firm(expression->left);
2377                 ir_node  *right = expression_to_firm(expression->right);
2378                 return create_op(dbgi, expression, left, right);
2379         }
2380         case EXPR_BINARY_LOGICAL_AND:
2381         case EXPR_BINARY_LOGICAL_OR:
2382                 return create_lazy_op(expression);
2383         case EXPR_BINARY_COMMA:
2384                 /* create side effects of left side */
2385                 (void) expression_to_firm(expression->left);
2386                 return _expression_to_firm(expression->right);
2387
2388         case EXPR_BINARY_ADD_ASSIGN:
2389         case EXPR_BINARY_SUB_ASSIGN:
2390         case EXPR_BINARY_MUL_ASSIGN:
2391         case EXPR_BINARY_MOD_ASSIGN:
2392         case EXPR_BINARY_DIV_ASSIGN:
2393         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2394         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2395         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2396         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2397         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2398                 return create_assign_binop(expression);
2399         case EXPR_BINARY_BUILTIN_EXPECT:
2400                 return _expression_to_firm(expression->left);
2401         default:
2402                 panic("TODO binexpr type");
2403         }
2404 }
2405
2406 static ir_node *array_access_addr(const array_access_expression_t *expression)
2407 {
2408         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2409         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2410         ir_node  *offset    = expression_to_firm(expression->index);
2411
2412         type_t  *offset_type = skip_typeref(expression->index->base.type);
2413         ir_mode *mode;
2414         if (is_type_signed(offset_type)) {
2415                 mode = get_ir_mode(type_ssize_t);
2416         } else {
2417                 mode = get_ir_mode(type_size_t);
2418         }
2419         offset = create_conv(dbgi, offset, mode);
2420
2421         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2422         assert(is_type_pointer(ref_type));
2423         pointer_type_t *pointer_type = &ref_type->pointer;
2424
2425         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2426         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2427         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2428                                              mode);
2429         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2430
2431         return result;
2432 }
2433
2434 static ir_node *array_access_to_firm(
2435                 const array_access_expression_t *expression)
2436 {
2437         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2438         ir_node  *addr   = array_access_addr(expression);
2439         type_t   *type   = revert_automatic_type_conversion(
2440                         (const expression_t*) expression);
2441         type             = skip_typeref(type);
2442
2443         return deref_address(dbgi, type, addr);
2444 }
2445
2446 static long get_offsetof_offset(const offsetof_expression_t *expression)
2447 {
2448         type_t *orig_type = expression->type;
2449         long    offset    = 0;
2450
2451         designator_t *designator = expression->designator;
2452         for( ; designator != NULL; designator = designator->next) {
2453                 type_t *type = skip_typeref(orig_type);
2454                 /* be sure the type is constructed */
2455                 (void) get_ir_type(type);
2456
2457                 if (designator->symbol != NULL) {
2458                         assert(is_type_compound(type));
2459                         symbol_t *symbol = designator->symbol;
2460
2461                         declaration_t *declaration = type->compound.declaration;
2462                         declaration_t *iter        = declaration->scope.declarations;
2463                         for( ; iter != NULL; iter = iter->next) {
2464                                 if (iter->symbol == symbol) {
2465                                         break;
2466                                 }
2467                         }
2468                         assert(iter != NULL);
2469
2470                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2471                         offset += get_entity_offset(iter->v.entity);
2472
2473                         orig_type = iter->type;
2474                 } else {
2475                         expression_t *array_index = designator->array_index;
2476                         assert(designator->array_index != NULL);
2477                         assert(is_type_array(type));
2478                         assert(is_type_valid(array_index->base.type));
2479
2480                         long index         = fold_constant(array_index);
2481                         ir_type *arr_type  = get_ir_type(type);
2482                         ir_type *elem_type = get_array_element_type(arr_type);
2483                         long     elem_size = get_type_size_bytes(elem_type);
2484
2485                         offset += index * elem_size;
2486
2487                         orig_type = type->array.element_type;
2488                 }
2489         }
2490
2491         return offset;
2492 }
2493
2494 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2495 {
2496         ir_mode  *mode   = get_ir_mode(expression->base.type);
2497         long      offset = get_offsetof_offset(expression);
2498         tarval   *tv     = new_tarval_from_long(offset, mode);
2499         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2500
2501         return new_d_Const(dbgi, mode, tv);
2502 }
2503
2504 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2505                                      ir_entity *entity, type_t *type);
2506
2507 static ir_node *compound_literal_to_firm(
2508                 const compound_literal_expression_t *expression)
2509 {
2510         type_t *type = expression->type;
2511
2512         /* create an entity on the stack */
2513         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2514
2515         ident     *const id     = id_unique("CompLit.%u");
2516         ir_type   *const irtype = get_ir_type(type);
2517         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2518         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2519         set_entity_ld_ident(entity, id);
2520
2521         set_entity_variability(entity, variability_uninitialized);
2522
2523         /* create initialisation code */
2524         initializer_t *initializer = expression->initializer;
2525         create_local_initializer(initializer, dbgi, entity, type);
2526
2527         /* create a sel for the compound literal address */
2528         ir_node *frame = get_local_frame(entity);
2529         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2530         return sel;
2531 }
2532
2533 /**
2534  * Transform a sizeof expression into Firm code.
2535  */
2536 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2537 {
2538         type_t *type = expression->type;
2539         if (type == NULL) {
2540                 type = expression->tp_expression->base.type;
2541                 assert(type != NULL);
2542         }
2543
2544         type = skip_typeref(type);
2545         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2546         if (is_type_array(type) && type->array.is_vla
2547                         && expression->tp_expression != NULL) {
2548                 expression_to_firm(expression->tp_expression);
2549         }
2550
2551         return get_type_size(type);
2552 }
2553
2554 /**
2555  * Transform an alignof expression into Firm code.
2556  */
2557 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2558 {
2559         type_t *type = expression->type;
2560         if (type == NULL) {
2561                 /* beware: if expression is a variable reference, return the
2562                    alignment of the variable. */
2563                 const expression_t *tp_expression = expression->tp_expression;
2564                 const declaration_t *declaration = expr_is_variable(tp_expression);
2565                 if (declaration != NULL) {
2566                         /* TODO: get the alignment of this variable. */
2567                 }
2568                 type = tp_expression->base.type;
2569                 assert(type != NULL);
2570         }
2571
2572         ir_mode *const mode = get_ir_mode(expression->base.type);
2573         symconst_symbol sym;
2574         sym.type_p = get_ir_type(type);
2575         return new_SymConst(mode, sym, symconst_type_align);
2576 }
2577
2578 static void init_ir_types(void);
2579 long fold_constant(const expression_t *expression)
2580 {
2581         bool constant_folding_old = constant_folding;
2582         constant_folding = true;
2583
2584         init_ir_types();
2585
2586         assert(is_constant_expression(expression));
2587
2588         ir_graph *old_current_ir_graph = current_ir_graph;
2589         if (current_ir_graph == NULL) {
2590                 current_ir_graph = get_const_code_irg();
2591         }
2592
2593         ir_node *cnst = expression_to_firm(expression);
2594         current_ir_graph = old_current_ir_graph;
2595
2596         if (!is_Const(cnst)) {
2597                 panic("couldn't fold constant\n");
2598         }
2599
2600         tarval *tv = get_Const_tarval(cnst);
2601         if (!tarval_is_long(tv)) {
2602                 panic("result of constant folding is not integer\n");
2603         }
2604
2605         constant_folding = constant_folding_old;
2606
2607         return get_tarval_long(tv);
2608 }
2609
2610 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2611 {
2612         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2613
2614         /* first try to fold a constant condition */
2615         if (is_constant_expression(expression->condition)) {
2616                 long val = fold_constant(expression->condition);
2617                 if (val) {
2618                         return expression_to_firm(expression->true_expression);
2619                 } else {
2620                         return expression_to_firm(expression->false_expression);
2621                 }
2622         }
2623
2624         ir_node *cur_block   = get_cur_block();
2625
2626         /* create the true block */
2627         ir_node *true_block  = new_immBlock();
2628
2629         ir_node *true_val = expression_to_firm(expression->true_expression);
2630         ir_node *true_jmp = new_Jmp();
2631
2632         /* create the false block */
2633         ir_node *false_block = new_immBlock();
2634
2635         ir_node *false_val = expression_to_firm(expression->false_expression);
2636         ir_node *false_jmp = new_Jmp();
2637
2638         /* create the condition evaluation */
2639         set_cur_block(cur_block);
2640         create_condition_evaluation(expression->condition, true_block, false_block);
2641         mature_immBlock(true_block);
2642         mature_immBlock(false_block);
2643
2644         /* create the common block */
2645         ir_node *common_block = new_immBlock();
2646         add_immBlock_pred(common_block, true_jmp);
2647         add_immBlock_pred(common_block, false_jmp);
2648         mature_immBlock(common_block);
2649
2650         /* TODO improve static semantics, so either both or no values are NULL */
2651         if (true_val == NULL || false_val == NULL)
2652                 return NULL;
2653
2654         ir_node *in[2] = { true_val, false_val };
2655         ir_mode *mode  = get_irn_mode(true_val);
2656         assert(get_irn_mode(false_val) == mode);
2657         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2658
2659         return val;
2660 }
2661
2662 /**
2663  * Returns an IR-node representing the address of a field.
2664  */
2665 static ir_node *select_addr(const select_expression_t *expression)
2666 {
2667         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2668
2669         ir_node *compound_addr = expression_to_firm(expression->compound);
2670
2671         /* make sure the type is constructed */
2672         type_t *type = skip_typeref(expression->compound->base.type);
2673         if (is_type_pointer(type)) {
2674                 type = type->pointer.points_to;
2675         }
2676         (void) get_ir_type(type);
2677
2678         declaration_t *entry = expression->compound_entry;
2679         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2680         ir_entity     *entity = entry->v.entity;
2681
2682         assert(entity != NULL);
2683
2684         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2685
2686         return sel;
2687 }
2688
2689 static ir_node *select_to_firm(const select_expression_t *expression)
2690 {
2691         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2692         ir_node  *addr = select_addr(expression);
2693         type_t   *type = revert_automatic_type_conversion(
2694                         (const expression_t*) expression);
2695         type           = skip_typeref(type);
2696
2697         declaration_t *entry      = expression->compound_entry;
2698         type_t        *entry_type = skip_typeref(entry->type);
2699
2700         if (entry_type->kind == TYPE_BITFIELD) {
2701                 return bitfield_extract_to_firm(expression, addr);
2702         }
2703
2704         return deref_address(dbgi, type, addr);
2705 }
2706
2707 /* Values returned by __builtin_classify_type. */
2708 typedef enum gcc_type_class
2709 {
2710         no_type_class = -1,
2711         void_type_class,
2712         integer_type_class,
2713         char_type_class,
2714         enumeral_type_class,
2715         boolean_type_class,
2716         pointer_type_class,
2717         reference_type_class,
2718         offset_type_class,
2719         real_type_class,
2720         complex_type_class,
2721         function_type_class,
2722         method_type_class,
2723         record_type_class,
2724         union_type_class,
2725         array_type_class,
2726         string_type_class,
2727         set_type_class,
2728         file_type_class,
2729         lang_type_class
2730 } gcc_type_class;
2731
2732 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2733 {
2734         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2735
2736         gcc_type_class tc;
2737         switch (type->kind)
2738         {
2739                 case TYPE_ATOMIC: {
2740                         const atomic_type_t *const atomic_type = &type->atomic;
2741                         switch (atomic_type->akind) {
2742                                 /* should not be reached */
2743                                 case ATOMIC_TYPE_INVALID:
2744                                         tc = no_type_class;
2745                                         goto make_const;
2746
2747                                 /* gcc cannot do that */
2748                                 case ATOMIC_TYPE_VOID:
2749                                         tc = void_type_class;
2750                                         goto make_const;
2751
2752                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2753                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2754                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2755                                 case ATOMIC_TYPE_SHORT:
2756                                 case ATOMIC_TYPE_USHORT:
2757                                 case ATOMIC_TYPE_INT:
2758                                 case ATOMIC_TYPE_UINT:
2759                                 case ATOMIC_TYPE_LONG:
2760                                 case ATOMIC_TYPE_ULONG:
2761                                 case ATOMIC_TYPE_LONGLONG:
2762                                 case ATOMIC_TYPE_ULONGLONG:
2763                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2764                                         tc = integer_type_class;
2765                                         goto make_const;
2766
2767                                 case ATOMIC_TYPE_FLOAT:
2768                                 case ATOMIC_TYPE_DOUBLE:
2769                                 case ATOMIC_TYPE_LONG_DOUBLE:
2770                                         tc = real_type_class;
2771                                         goto make_const;
2772                         }
2773                         panic("Unexpected atomic type in classify_type_to_firm().");
2774                 }
2775
2776                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2777                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2778                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2779                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2780                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2781                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2782                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2783                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2784
2785                 /* gcc handles this as integer */
2786                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2787
2788                 case TYPE_BUILTIN:
2789                 /* typedef/typeof should be skipped already */
2790                 case TYPE_TYPEDEF:
2791                 case TYPE_TYPEOF:
2792                 case TYPE_INVALID:
2793                 case TYPE_ERROR:
2794                         break;
2795         }
2796         panic("unexpected TYPE classify_type_to_firm().");
2797
2798 make_const: ;
2799         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2800         ir_mode  *const mode = mode_int;
2801         tarval   *const tv   = new_tarval_from_long(tc, mode);
2802         return new_d_Const(dbgi, mode, tv);
2803 }
2804
2805 static ir_node *function_name_to_firm(
2806                 const funcname_expression_t *const expr)
2807 {
2808         switch(expr->kind) {
2809         case FUNCNAME_FUNCTION:
2810         case FUNCNAME_PRETTY_FUNCTION:
2811         case FUNCNAME_FUNCDNAME:
2812                 if (current_function_name == NULL) {
2813                         const source_position_t *const src_pos = &expr->base.source_position;
2814                         const char *const name = current_function_decl->symbol->string;
2815                         const string_t string = { name, strlen(name) + 1 };
2816                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2817                 }
2818                 return current_function_name;
2819         case FUNCNAME_FUNCSIG:
2820                 if (current_funcsig == NULL) {
2821                         const source_position_t *const src_pos = &expr->base.source_position;
2822                         ir_entity *ent = get_irg_entity(current_ir_graph);
2823                         const char *const name = get_entity_ld_name(ent);
2824                         const string_t string = { name, strlen(name) + 1 };
2825                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2826                 }
2827                 return current_funcsig;
2828         }
2829         panic("Unsupported function name");
2830 }
2831
2832 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2833 {
2834         statement_t *statement = expr->statement;
2835
2836         assert(statement->kind == STATEMENT_COMPOUND);
2837         return compound_statement_to_firm(&statement->compound);
2838 }
2839
2840 static ir_node *va_start_expression_to_firm(
2841         const va_start_expression_t *const expr)
2842 {
2843         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2844         int        const n           = get_method_n_params(method_type) - 1;
2845         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2846         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2847         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2848         ir_node   *const no_mem      = new_NoMem();
2849         ir_node   *const arg_sel     =
2850                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2851
2852         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2853         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2854         set_value_for_expression(expr->ap, add);
2855
2856         return NULL;
2857 }
2858
2859 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2860 {
2861         type_t       *const type    = expr->base.type;
2862         expression_t *const ap_expr = expr->ap;
2863         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2864         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2865         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2866         ir_node      *const res     = deref_address(dbgi, type, ap);
2867
2868         ir_node      *const cnst    = get_type_size(expr->base.type);
2869         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2870
2871         set_value_for_expression_addr(ap_expr, add, ap_addr);
2872
2873         return res;
2874 }
2875
2876 static ir_node *dereference_addr(const unary_expression_t *const expression)
2877 {
2878         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2879         return expression_to_firm(expression->value);
2880 }
2881
2882 /**
2883  * Returns a IR-node representing an lvalue of the given expression.
2884  */
2885 static ir_node *expression_to_addr(const expression_t *expression)
2886 {
2887         switch(expression->kind) {
2888         case EXPR_REFERENCE:
2889                 return reference_addr(&expression->reference);
2890         case EXPR_ARRAY_ACCESS:
2891                 return array_access_addr(&expression->array_access);
2892         case EXPR_SELECT:
2893                 return select_addr(&expression->select);
2894         case EXPR_CALL:
2895                 return call_expression_to_firm(&expression->call);
2896         case EXPR_UNARY_DEREFERENCE: {
2897                 return dereference_addr(&expression->unary);
2898         }
2899         default:
2900                 break;
2901         }
2902         panic("trying to get address of non-lvalue");
2903 }
2904
2905 static ir_node *builtin_constant_to_firm(
2906                 const builtin_constant_expression_t *expression)
2907 {
2908         ir_mode *mode = get_ir_mode(expression->base.type);
2909         long     v;
2910
2911         if (is_constant_expression(expression->value)) {
2912                 v = 1;
2913         } else {
2914                 v = 0;
2915         }
2916         return new_Const_long(mode, v);
2917 }
2918
2919 static ir_node *builtin_prefetch_to_firm(
2920                 const builtin_prefetch_expression_t *expression)
2921 {
2922         ir_node *adr = expression_to_firm(expression->adr);
2923         /* no Firm support for prefetch yet */
2924         (void) adr;
2925         return NULL;
2926 }
2927
2928 /**
2929  * creates firm nodes for an expression. The difference between this function
2930  * and expression_to_firm is, that this version might produce mode_b nodes
2931  * instead of mode_Is.
2932  */
2933 static ir_node *_expression_to_firm(const expression_t *expression)
2934 {
2935 #ifndef NDEBUG
2936         if (!constant_folding) {
2937                 assert(!expression->base.transformed);
2938                 ((expression_t*) expression)->base.transformed = true;
2939         }
2940 #endif
2941
2942         switch(expression->kind) {
2943         case EXPR_CHARACTER_CONSTANT:
2944                 return character_constant_to_firm(&expression->conste);
2945         case EXPR_WIDE_CHARACTER_CONSTANT:
2946                 return wide_character_constant_to_firm(&expression->conste);
2947         case EXPR_CONST:
2948                 return const_to_firm(&expression->conste);
2949         case EXPR_STRING_LITERAL:
2950                 return string_literal_to_firm(&expression->string);
2951         case EXPR_WIDE_STRING_LITERAL:
2952                 return wide_string_literal_to_firm(&expression->wide_string);
2953         case EXPR_REFERENCE:
2954                 return reference_expression_to_firm(&expression->reference);
2955         case EXPR_CALL:
2956                 return call_expression_to_firm(&expression->call);
2957         EXPR_UNARY_CASES
2958                 return unary_expression_to_firm(&expression->unary);
2959         EXPR_BINARY_CASES
2960                 return binary_expression_to_firm(&expression->binary);
2961         case EXPR_ARRAY_ACCESS:
2962                 return array_access_to_firm(&expression->array_access);
2963         case EXPR_SIZEOF:
2964                 return sizeof_to_firm(&expression->typeprop);
2965         case EXPR_ALIGNOF:
2966                 return alignof_to_firm(&expression->typeprop);
2967         case EXPR_CONDITIONAL:
2968                 return conditional_to_firm(&expression->conditional);
2969         case EXPR_SELECT:
2970                 return select_to_firm(&expression->select);
2971         case EXPR_CLASSIFY_TYPE:
2972                 return classify_type_to_firm(&expression->classify_type);
2973         case EXPR_FUNCNAME:
2974                 return function_name_to_firm(&expression->funcname);
2975         case EXPR_STATEMENT:
2976                 return statement_expression_to_firm(&expression->statement);
2977         case EXPR_VA_START:
2978                 return va_start_expression_to_firm(&expression->va_starte);
2979         case EXPR_VA_ARG:
2980                 return va_arg_expression_to_firm(&expression->va_arge);
2981         case EXPR_BUILTIN_SYMBOL:
2982                 panic("unimplemented expression found");
2983         case EXPR_BUILTIN_CONSTANT_P:
2984                 return builtin_constant_to_firm(&expression->builtin_constant);
2985         case EXPR_BUILTIN_PREFETCH:
2986                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2987         case EXPR_OFFSETOF:
2988                 return offsetof_to_firm(&expression->offsetofe);
2989         case EXPR_COMPOUND_LITERAL:
2990                 return compound_literal_to_firm(&expression->compound_literal);
2991
2992         case EXPR_UNKNOWN:
2993         case EXPR_INVALID:
2994                 break;
2995         }
2996         panic("invalid expression found");
2997 }
2998
2999 static bool produces_mode_b(const expression_t *expression)
3000 {
3001         switch (expression->kind) {
3002         case EXPR_BINARY_EQUAL:
3003         case EXPR_BINARY_NOTEQUAL:
3004         case EXPR_BINARY_LESS:
3005         case EXPR_BINARY_LESSEQUAL:
3006         case EXPR_BINARY_GREATER:
3007         case EXPR_BINARY_GREATEREQUAL:
3008         case EXPR_BINARY_ISGREATER:
3009         case EXPR_BINARY_ISGREATEREQUAL:
3010         case EXPR_BINARY_ISLESS:
3011         case EXPR_BINARY_ISLESSEQUAL:
3012         case EXPR_BINARY_ISLESSGREATER:
3013         case EXPR_BINARY_ISUNORDERED:
3014         case EXPR_UNARY_NOT:
3015                 return true;
3016
3017         case EXPR_BINARY_BUILTIN_EXPECT:
3018                 return produces_mode_b(expression->binary.left);
3019         case EXPR_BINARY_COMMA:
3020                 return produces_mode_b(expression->binary.right);
3021
3022         default:
3023                 return false;
3024         }
3025 }
3026
3027 static ir_node *expression_to_firm(const expression_t *expression)
3028 {
3029         if (!produces_mode_b(expression)) {
3030                 ir_node *res = _expression_to_firm(expression);
3031                 assert(res == NULL || get_irn_mode(res) != mode_b);
3032                 return res;
3033         }
3034
3035         if (is_constant_expression(expression)) {
3036                 ir_node *res  = _expression_to_firm(expression);
3037                 ir_mode *mode = get_ir_mode(expression->base.type);
3038                 assert(is_Const(res));
3039                 if (is_Const_null(res)) {
3040                         return new_Const_long(mode, 0);
3041                 } else {
3042                         return new_Const_long(mode, 1);
3043                 }
3044         }
3045
3046         /* we have to produce a 0/1 from the mode_b expression */
3047         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3048         return produce_condition_result(expression, dbgi);
3049 }
3050
3051 static ir_node *expression_to_modeb(const expression_t *expression)
3052 {
3053         ir_node *res = _expression_to_firm(expression);
3054         res          = create_conv(NULL, res, mode_b);
3055
3056         return res;
3057 }
3058
3059 /**
3060  * create a short-circuit expression evaluation that tries to construct
3061  * efficient control flow structures for &&, || and ! expressions
3062  */
3063 static void create_condition_evaluation(const expression_t *expression,
3064                                         ir_node *true_block,
3065                                         ir_node *false_block)
3066 {
3067         switch(expression->kind) {
3068         case EXPR_UNARY_NOT: {
3069                 const unary_expression_t *unary_expression = &expression->unary;
3070                 create_condition_evaluation(unary_expression->value, false_block,
3071                                             true_block);
3072                 return;
3073         }
3074         case EXPR_BINARY_LOGICAL_AND: {
3075                 const binary_expression_t *binary_expression = &expression->binary;
3076
3077                 ir_node *cur_block   = get_cur_block();
3078                 ir_node *extra_block = new_immBlock();
3079                 set_cur_block(cur_block);
3080                 create_condition_evaluation(binary_expression->left, extra_block,
3081                                             false_block);
3082                 mature_immBlock(extra_block);
3083                 set_cur_block(extra_block);
3084                 create_condition_evaluation(binary_expression->right, true_block,
3085                                             false_block);
3086                 return;
3087         }
3088         case EXPR_BINARY_LOGICAL_OR: {
3089                 const binary_expression_t *binary_expression = &expression->binary;
3090
3091                 ir_node *cur_block   = get_cur_block();
3092                 ir_node *extra_block = new_immBlock();
3093                 set_cur_block(cur_block);
3094                 create_condition_evaluation(binary_expression->left, true_block,
3095                                             extra_block);
3096                 mature_immBlock(extra_block);
3097                 set_cur_block(extra_block);
3098                 create_condition_evaluation(binary_expression->right, true_block,
3099                                             false_block);
3100                 return;
3101         }
3102         default:
3103                 break;
3104         }
3105
3106         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3107         ir_node  *condition  = expression_to_modeb(expression);
3108         ir_node  *cond       = new_d_Cond(dbgi, condition);
3109         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3110         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3111
3112         /* set branch prediction info based on __builtin_expect */
3113         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3114                 long               cnst = fold_constant(expression->binary.right);
3115                 cond_jmp_predicate pred;
3116
3117                 if (cnst == 0) {
3118                         pred = COND_JMP_PRED_FALSE;
3119                 } else {
3120                         pred = COND_JMP_PRED_TRUE;
3121                 }
3122                 set_Cond_jmp_pred(cond, pred);
3123         }
3124
3125         add_immBlock_pred(true_block, true_proj);
3126         if (false_block != NULL) {
3127                 add_immBlock_pred(false_block, false_proj);
3128         }
3129
3130         set_cur_block(NULL);
3131 }
3132
3133
3134
3135 static void create_declaration_entity(declaration_t *declaration,
3136                                       declaration_kind_t declaration_kind,
3137                                       ir_type *parent_type)
3138 {
3139         type_t    *const type   = skip_typeref(declaration->type);
3140         if (is_type_function(type)) {
3141                 (void) get_function_entity(declaration);
3142                 return;
3143         }
3144
3145         ident     *const id     = new_id_from_str(declaration->symbol->string);
3146         ir_type   *const irtype = get_ir_type(type);
3147         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3148         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3149
3150         declaration->declaration_kind = (unsigned char) declaration_kind;
3151         declaration->v.entity         = entity;
3152         set_entity_variability(entity, variability_uninitialized);
3153         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3154         if (parent_type == get_tls_type())
3155                 set_entity_allocation(entity, allocation_automatic);
3156         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3157                 set_entity_allocation(entity, allocation_static);
3158
3159         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3160                 set_entity_volatility(entity, volatility_is_volatile);
3161         }
3162 }
3163
3164
3165 typedef struct type_path_entry_t type_path_entry_t;
3166 struct type_path_entry_t {
3167         type_t           *type;
3168         ir_initializer_t *initializer;
3169         size_t            index;
3170         declaration_t    *compound_entry;
3171 };
3172
3173 typedef struct type_path_t type_path_t;
3174 struct type_path_t {
3175         type_path_entry_t *path;
3176         type_t            *top_type;
3177         bool               invalid;
3178 };
3179
3180 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3181 {
3182         size_t len = ARR_LEN(path->path);
3183
3184         for(size_t i = 0; i < len; ++i) {
3185                 const type_path_entry_t *entry = & path->path[i];
3186
3187                 type_t *type = skip_typeref(entry->type);
3188                 if (is_type_compound(type)) {
3189                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3190                 } else if (is_type_array(type)) {
3191                         fprintf(stderr, "[%zd]", entry->index);
3192                 } else {
3193                         fprintf(stderr, "-INVALID-");
3194                 }
3195         }
3196         fprintf(stderr, "  (");
3197         print_type(path->top_type);
3198         fprintf(stderr, ")");
3199 }
3200
3201 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3202 {
3203         size_t len = ARR_LEN(path->path);
3204         assert(len > 0);
3205         return & path->path[len-1];
3206 }
3207
3208 static type_path_entry_t *append_to_type_path(type_path_t *path)
3209 {
3210         size_t len = ARR_LEN(path->path);
3211         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3212
3213         type_path_entry_t *result = & path->path[len];
3214         memset(result, 0, sizeof(result[0]));
3215         return result;
3216 }
3217
3218 static size_t get_compound_size(const compound_type_t *type)
3219 {
3220         declaration_t *declaration = type->declaration;
3221         declaration_t *member      = declaration->scope.declarations;
3222         size_t         size        = 0;
3223         for( ; member != NULL; member = member->next) {
3224                 ++size;
3225         }
3226         /* TODO: cache results? */
3227
3228         return size;
3229 }
3230
3231 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3232 {
3233         type_t *orig_top_type = path->top_type;
3234         type_t *top_type      = skip_typeref(orig_top_type);
3235
3236         assert(is_type_compound(top_type) || is_type_array(top_type));
3237
3238         if (ARR_LEN(path->path) == 0) {
3239                 return NULL;
3240         } else {
3241                 type_path_entry_t *top         = get_type_path_top(path);
3242                 ir_initializer_t  *initializer = top->initializer;
3243                 return get_initializer_compound_value(initializer, top->index);
3244         }
3245 }
3246
3247 static void descend_into_subtype(type_path_t *path)
3248 {
3249         type_t *orig_top_type = path->top_type;
3250         type_t *top_type      = skip_typeref(orig_top_type);
3251
3252         assert(is_type_compound(top_type) || is_type_array(top_type));
3253
3254         ir_initializer_t *initializer = get_initializer_entry(path);
3255
3256         type_path_entry_t *top = append_to_type_path(path);
3257         top->type              = top_type;
3258
3259         size_t len;
3260
3261         if (is_type_compound(top_type)) {
3262                 declaration_t *declaration = top_type->compound.declaration;
3263                 declaration_t *entry       = declaration->scope.declarations;
3264
3265                 top->compound_entry = entry;
3266                 top->index          = 0;
3267                 len                 = get_compound_size(&top_type->compound);
3268                 if (entry != NULL)
3269                         path->top_type = entry->type;
3270         } else {
3271                 assert(is_type_array(top_type));
3272                 assert(top_type->array.size > 0);
3273
3274                 top->index     = 0;
3275                 path->top_type = top_type->array.element_type;
3276                 len            = top_type->array.size;
3277         }
3278         if (initializer == NULL
3279                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3280                 initializer = create_initializer_compound(len);
3281                 /* we have to set the entry at the 2nd latest path entry... */
3282                 size_t path_len = ARR_LEN(path->path);
3283                 assert(path_len >= 1);
3284                 if (path_len > 1) {
3285                         type_path_entry_t *entry        = & path->path[path_len-2];
3286                         ir_initializer_t  *tinitializer = entry->initializer;
3287                         set_initializer_compound_value(tinitializer, entry->index,
3288                                                        initializer);
3289                 }
3290         }
3291         top->initializer = initializer;
3292 }
3293
3294 static void ascend_from_subtype(type_path_t *path)
3295 {
3296         type_path_entry_t *top = get_type_path_top(path);
3297
3298         path->top_type = top->type;
3299
3300         size_t len = ARR_LEN(path->path);
3301         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3302 }
3303
3304 static void walk_designator(type_path_t *path, const designator_t *designator)
3305 {
3306         /* designators start at current object type */
3307         ARR_RESIZE(type_path_entry_t, path->path, 1);
3308
3309         for( ; designator != NULL; designator = designator->next) {
3310                 type_path_entry_t *top         = get_type_path_top(path);
3311                 type_t            *orig_type   = top->type;
3312                 type_t            *type        = skip_typeref(orig_type);
3313
3314                 if (designator->symbol != NULL) {
3315                         assert(is_type_compound(type));
3316                         size_t    index  = 0;
3317                         symbol_t *symbol = designator->symbol;
3318
3319                         declaration_t *declaration = type->compound.declaration;
3320                         declaration_t *iter        = declaration->scope.declarations;
3321                         for( ; iter != NULL; iter = iter->next, ++index) {
3322                                 if (iter->symbol == symbol) {
3323                                         break;
3324                                 }
3325                         }
3326                         assert(iter != NULL);
3327
3328                         top->type           = orig_type;
3329                         top->compound_entry = iter;
3330                         top->index          = index;
3331                         orig_type           = iter->type;
3332                 } else {
3333                         expression_t *array_index = designator->array_index;
3334                         assert(designator->array_index != NULL);
3335                         assert(is_type_array(type));
3336                         assert(is_type_valid(array_index->base.type));
3337
3338                         long index = fold_constant(array_index);
3339                         assert(index >= 0);
3340 #ifndef NDEBUG
3341                         if (type->array.size_constant == 1) {
3342                                 long array_size = type->array.size;
3343                                 assert(index < array_size);
3344                         }
3345 #endif
3346
3347                         top->type  = orig_type;
3348                         top->index = (size_t) index;
3349                         orig_type  = type->array.element_type;
3350                 }
3351                 path->top_type = orig_type;
3352
3353                 if (designator->next != NULL) {
3354                         descend_into_subtype(path);
3355                 }
3356         }
3357
3358         path->invalid  = false;
3359 }
3360
3361 static void advance_current_object(type_path_t *path)
3362 {
3363         if (path->invalid) {
3364                 /* TODO: handle this... */
3365                 panic("invalid initializer in ast2firm (excessive elements)");
3366                 return;
3367         }
3368
3369         type_path_entry_t *top = get_type_path_top(path);
3370
3371         type_t *type = skip_typeref(top->type);
3372         if (is_type_union(type)) {
3373                 top->compound_entry = NULL;
3374         } else if (is_type_struct(type)) {
3375                 declaration_t *entry = top->compound_entry;
3376
3377                 top->index++;
3378                 entry               = entry->next;
3379                 top->compound_entry = entry;
3380                 if (entry != NULL) {
3381                         path->top_type = entry->type;
3382                         return;
3383                 }
3384         } else {
3385                 assert(is_type_array(type));
3386
3387                 top->index++;
3388                 if (!type->array.size_constant || top->index < type->array.size) {
3389                         return;
3390                 }
3391         }
3392
3393         /* we're past the last member of the current sub-aggregate, try if we
3394          * can ascend in the type hierarchy and continue with another subobject */
3395         size_t len = ARR_LEN(path->path);
3396
3397         if (len > 1) {
3398                 ascend_from_subtype(path);
3399                 advance_current_object(path);
3400         } else {
3401                 path->invalid = true;
3402         }
3403 }
3404
3405
3406 static ir_initializer_t *create_ir_initializer(
3407                 const initializer_t *initializer, type_t *type);
3408
3409 static ir_initializer_t *create_ir_initializer_value(
3410                 const initializer_value_t *initializer)
3411 {
3412         if (is_type_compound(initializer->value->base.type)) {
3413                 panic("initializer creation for compounds not implemented yet");
3414         }
3415         ir_node *value = expression_to_firm(initializer->value);
3416         return create_initializer_const(value);
3417 }
3418
3419 static ir_initializer_t *create_ir_initializer_list(
3420                 const initializer_list_t *initializer, type_t *type)
3421 {
3422         type_path_t path;
3423         memset(&path, 0, sizeof(path));
3424         path.top_type = type;
3425         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3426
3427         descend_into_subtype(&path);
3428
3429         for(size_t i = 0; i < initializer->len; ++i) {
3430                 const initializer_t *sub_initializer = initializer->initializers[i];
3431
3432                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3433                         walk_designator(&path, sub_initializer->designator.designator);
3434                         continue;
3435                 }
3436
3437                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3438                         /* we might have to descend into types until we're at a scalar
3439                          * type */
3440                         while(true) {
3441                                 type_t *orig_top_type = path.top_type;
3442                                 type_t *top_type      = skip_typeref(orig_top_type);
3443
3444                                 if (is_type_scalar(top_type))
3445                                         break;
3446                                 descend_into_subtype(&path);
3447                         }
3448                 }
3449
3450                 ir_initializer_t *sub_irinitializer
3451                         = create_ir_initializer(sub_initializer, path.top_type);
3452
3453                 size_t path_len = ARR_LEN(path.path);
3454                 assert(path_len >= 1);
3455                 type_path_entry_t *entry        = & path.path[path_len-1];
3456                 ir_initializer_t  *tinitializer = entry->initializer;
3457                 set_initializer_compound_value(tinitializer, entry->index,
3458                                                sub_irinitializer);
3459
3460                 advance_current_object(&path);
3461         }
3462
3463         assert(ARR_LEN(path.path) >= 1);
3464         ir_initializer_t *result = path.path[0].initializer;
3465         DEL_ARR_F(path.path);
3466
3467         return result;
3468 }
3469
3470 static ir_initializer_t *create_ir_initializer_string(
3471                 const initializer_string_t *initializer, type_t *type)
3472 {
3473         type = skip_typeref(type);
3474
3475         size_t            string_len    = initializer->string.size;
3476         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3477         size_t            len           = type->array.size;
3478         ir_initializer_t *irinitializer = create_initializer_compound(len);
3479
3480         const char *string = initializer->string.begin;
3481         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3482
3483         for(size_t i = 0; i < len; ++i) {
3484                 char c = 0;
3485                 if (i < string_len)
3486                         c = string[i];
3487
3488                 tarval           *tv = new_tarval_from_long(c, mode);
3489                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3490
3491                 set_initializer_compound_value(irinitializer, i, char_initializer);
3492         }
3493
3494         return irinitializer;
3495 }
3496
3497 static ir_initializer_t *create_ir_initializer_wide_string(
3498                 const initializer_wide_string_t *initializer, type_t *type)
3499 {
3500         size_t            string_len    = initializer->string.size;
3501         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3502         size_t            len           = type->array.size;
3503         ir_initializer_t *irinitializer = create_initializer_compound(len);
3504
3505         const wchar_rep_t *string = initializer->string.begin;
3506         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3507
3508         for(size_t i = 0; i < len; ++i) {
3509                 wchar_rep_t c = 0;
3510                 if (i < string_len) {
3511                         c = string[i];
3512                 }
3513                 tarval *tv = new_tarval_from_long(c, mode);
3514                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3515
3516                 set_initializer_compound_value(irinitializer, i, char_initializer);
3517         }
3518
3519         return irinitializer;
3520 }
3521
3522 static ir_initializer_t *create_ir_initializer(
3523                 const initializer_t *initializer, type_t *type)
3524 {
3525         switch(initializer->kind) {
3526                 case INITIALIZER_STRING:
3527                         return create_ir_initializer_string(&initializer->string, type);
3528
3529                 case INITIALIZER_WIDE_STRING:
3530                         return create_ir_initializer_wide_string(&initializer->wide_string,
3531                                                                  type);
3532
3533                 case INITIALIZER_LIST:
3534                         return create_ir_initializer_list(&initializer->list, type);
3535
3536                 case INITIALIZER_VALUE:
3537                         return create_ir_initializer_value(&initializer->value);
3538
3539                 case INITIALIZER_DESIGNATOR:
3540                         panic("unexpected designator initializer found");
3541         }
3542         panic("unknown initializer");
3543 }
3544
3545 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3546                 ir_node *base_addr)
3547 {
3548         if (is_atomic_type(type)) {
3549                 ir_mode *mode = get_type_mode(type);
3550                 tarval  *zero = get_mode_null(mode);
3551                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3552
3553                 /* TODO: bitfields */
3554                 ir_node *mem    = get_store();
3555                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3556                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3557                 set_store(proj_m);
3558         } else {
3559                 assert(is_compound_type(type));
3560
3561                 int n_members;
3562                 if (is_Array_type(type)) {
3563                         assert(has_array_upper_bound(type, 0));
3564                         n_members = get_array_upper_bound_int(type, 0);
3565                 } else {
3566                         n_members = get_compound_n_members(type);
3567                 }
3568
3569                 for(int i = 0; i < n_members; ++i) {
3570                         ir_node *addr;
3571                         ir_type *irtype;
3572                         if (is_Array_type(type)) {
3573                                 ir_entity *entity   = get_array_element_entity(type);
3574                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3575                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3576                                 ir_node   *in[1]    = { cnst };
3577                                 irtype = get_array_element_type(type);
3578                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3579                         } else {
3580                                 ir_entity *member = get_compound_member(type, i);
3581
3582                                 irtype = get_entity_type(member);
3583                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3584                         }
3585
3586                         create_dynamic_null_initializer(irtype, dbgi, addr);
3587                 }
3588         }
3589 }
3590
3591 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3592                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3593 {
3594         switch(get_initializer_kind(initializer)) {
3595         case IR_INITIALIZER_NULL: {
3596                 create_dynamic_null_initializer(type, dbgi, base_addr);
3597                 return;
3598         }
3599         case IR_INITIALIZER_CONST: {
3600                 ir_node *node = get_initializer_const_value(initializer);
3601                 ir_mode *mode = get_irn_mode(node);
3602                 assert(get_type_mode(type) == mode);
3603
3604                 /* TODO: bitfields... */
3605                 ir_node *mem    = get_store();
3606                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3607                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3608                 set_store(proj_m);
3609                 return;
3610         }
3611         case IR_INITIALIZER_TARVAL: {
3612                 tarval  *tv   = get_initializer_tarval_value(initializer);
3613                 ir_mode *mode = get_tarval_mode(tv);
3614                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3615                 assert(get_type_mode(type) == mode);
3616
3617                 /* TODO: bitfields... */
3618                 ir_node *mem    = get_store();
3619                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3620                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3621                 set_store(proj_m);
3622                 return;
3623         }
3624         case IR_INITIALIZER_COMPOUND: {
3625                 assert(is_compound_type(type));
3626                 int n_members;
3627                 if (is_Array_type(type)) {
3628                         assert(has_array_upper_bound(type, 0));
3629                         n_members = get_array_upper_bound_int(type, 0);
3630                 } else {
3631                         n_members = get_compound_n_members(type);
3632                 }
3633
3634                 if (get_initializer_compound_n_entries(initializer)
3635                                 != (unsigned) n_members)
3636                         panic("initializer doesn't match compound type");
3637
3638                 for(int i = 0; i < n_members; ++i) {
3639                         ir_node *addr;
3640                         ir_type *irtype;
3641                         if (is_Array_type(type)) {
3642                                 ir_entity *entity   = get_array_element_entity(type);
3643                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3644                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3645                                 ir_node   *in[1]    = { cnst };
3646                                 irtype = get_array_element_type(type);
3647                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3648                         } else {
3649                                 ir_entity *member = get_compound_member(type, i);
3650
3651                                 irtype = get_entity_type(member);
3652                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3653                         }
3654
3655                         ir_initializer_t *sub_init
3656                                 = get_initializer_compound_value(initializer, i);
3657
3658                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3659                 }
3660                 return;
3661         }
3662         }
3663
3664         panic("invalid IR_INITIALIZER found");
3665 }
3666
3667 static void create_dynamic_initializer(ir_initializer_t *initializer,
3668                 dbg_info *dbgi, ir_entity *entity)
3669 {
3670         ir_node *frame     = get_local_frame(entity);
3671         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3672         ir_type *type      = get_entity_type(entity);
3673
3674         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3675 }
3676
3677 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3678                                      ir_entity *entity, type_t *type)
3679 {
3680         ir_node *memory = get_store();
3681         ir_node *nomem  = new_NoMem();
3682         ir_node *frame  = get_irg_frame(current_ir_graph);
3683         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3684
3685         if (initializer->kind == INITIALIZER_VALUE) {
3686                 initializer_value_t *initializer_value = &initializer->value;
3687
3688                 ir_node *value = expression_to_firm(initializer_value->value);
3689                 type = skip_typeref(type);
3690                 assign_value(dbgi, addr, type, value);
3691                 return;
3692         }
3693
3694         if (!is_constant_initializer(initializer)) {
3695                 ir_initializer_t *irinitializer
3696                         = create_ir_initializer(initializer, type);
3697
3698                 create_dynamic_initializer(irinitializer, dbgi, entity);
3699                 return;
3700         }
3701
3702         /* create the ir_initializer */
3703         ir_graph *const old_current_ir_graph = current_ir_graph;
3704         current_ir_graph = get_const_code_irg();
3705
3706         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3707
3708         assert(current_ir_graph == get_const_code_irg());
3709         current_ir_graph = old_current_ir_graph;
3710
3711         /* create a "template" entity which is copied to the entity on the stack */
3712         ident     *const id          = id_unique("initializer.%u");
3713         ir_type   *const irtype      = get_ir_type(type);
3714         ir_type   *const global_type = get_glob_type();
3715         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3716         set_entity_ld_ident(init_entity, id);
3717
3718         set_entity_variability(init_entity, variability_initialized);
3719         set_entity_visibility(init_entity, visibility_local);
3720         set_entity_allocation(init_entity, allocation_static);
3721
3722         set_entity_initializer(init_entity, irinitializer);
3723
3724         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3725         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3726
3727         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3728         set_store(copyb_mem);
3729 }
3730
3731 static void create_initializer_local_variable_entity(declaration_t *declaration)
3732 {
3733         initializer_t *initializer = declaration->init.initializer;
3734         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3735         ir_entity     *entity      = declaration->v.entity;
3736         type_t        *type        = declaration->type;
3737         create_local_initializer(initializer, dbgi, entity, type);
3738 }
3739
3740 static void create_declaration_initializer(declaration_t *declaration)
3741 {
3742         initializer_t *initializer = declaration->init.initializer;
3743         if (initializer == NULL)
3744                 return;
3745
3746         declaration_kind_t declaration_kind
3747                 = (declaration_kind_t) declaration->declaration_kind;
3748         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3749                 create_initializer_local_variable_entity(declaration);
3750                 return;
3751         }
3752
3753         type_t *type = skip_typeref(declaration->type);
3754
3755         if (initializer->kind == INITIALIZER_VALUE) {
3756                 initializer_value_t *initializer_value = &initializer->value;
3757                 dbg_info            *dbgi
3758                         = get_dbg_info(&declaration->source_position);
3759
3760                 ir_node *value = expression_to_firm(initializer_value->value);
3761                 value = do_strict_conv(dbgi, value);
3762
3763                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3764                         set_value(declaration->v.value_number, value);
3765                 } else {
3766                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3767
3768                         ir_entity *entity = declaration->v.entity;
3769
3770                         if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3771                                 set_entity_variability(entity, variability_constant);
3772                         } else {
3773                                 set_entity_variability(entity, variability_initialized);
3774                         }
3775                         set_atomic_ent_value(entity, value);
3776                 }
3777         } else {
3778                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3779                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3780
3781                 ir_entity        *entity        = declaration->v.entity;
3782                 ir_initializer_t *irinitializer
3783                         = create_ir_initializer(initializer, type);
3784
3785                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3786                         set_entity_variability(entity, variability_constant);
3787                 } else {
3788                         set_entity_variability(entity, variability_initialized);
3789                 }
3790                 set_entity_initializer(entity, irinitializer);
3791         }
3792 }
3793
3794 static void create_variable_length_array(declaration_t *declaration)
3795 {
3796         /* initializers are not allowed for VLAs */
3797         assert(declaration->init.initializer == NULL);
3798
3799         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3800         declaration->v.vla_base       = NULL;
3801
3802         /* TODO: record VLA somewhere so we create the free node when we leave
3803          * it's scope */
3804 }
3805
3806 static void allocate_variable_length_array(declaration_t *declaration)
3807 {
3808         /* initializers are not allowed for VLAs */
3809         assert(declaration->init.initializer == NULL);
3810         assert(get_cur_block() != NULL);
3811
3812         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3813         type_t   *type      = declaration->type;
3814         ir_type  *el_type   = get_ir_type(type->array.element_type);
3815
3816         /* make sure size_node is calculated */
3817         get_type_size(type);
3818         ir_node  *elems = type->array.size_node;
3819         ir_node  *mem   = get_store();
3820         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3821
3822         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3823         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3824         set_store(proj_m);
3825
3826         assert(declaration->declaration_kind
3827                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3828         declaration->v.vla_base       = addr;
3829 }
3830
3831 /**
3832  * Creates a Firm local variable from a declaration.
3833  */
3834 static void create_local_variable(declaration_t *declaration)
3835 {
3836         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3837
3838         bool needs_entity = declaration->address_taken;
3839         type_t *type = skip_typeref(declaration->type);
3840
3841         /* is it a variable length array? */
3842         if (is_type_array(type) && !type->array.size_constant) {
3843                 create_variable_length_array(declaration);
3844                 return;
3845         } else if (is_type_array(type) || is_type_compound(type)) {
3846                 needs_entity = true;
3847         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3848                 needs_entity = true;
3849         }
3850
3851         if (needs_entity) {
3852                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3853                 create_declaration_entity(declaration,
3854                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3855                                           frame_type);
3856         } else {
3857                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3858                 declaration->v.value_number   = next_value_number_function;
3859                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3860                 ++next_value_number_function;
3861         }
3862 }
3863
3864 static void create_local_static_variable(declaration_t *declaration)
3865 {
3866         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3867
3868         type_t    *const type        = skip_typeref(declaration->type);
3869         ir_type   *const global_type = get_glob_type();
3870         ir_type   *const irtype      = get_ir_type(type);
3871         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3872
3873         size_t l = strlen(declaration->symbol->string);
3874         char   buf[l + sizeof(".%u")];
3875         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3876         ident     *const id = id_unique(buf);
3877
3878         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3879
3880         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3881                 set_entity_volatility(entity, volatility_is_volatile);
3882         }
3883
3884         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3885         declaration->v.entity         = entity;
3886         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3887         set_entity_variability(entity, variability_uninitialized);
3888         set_entity_visibility(entity, visibility_local);
3889         set_entity_allocation(entity, allocation_static);
3890
3891         ir_graph *const old_current_ir_graph = current_ir_graph;
3892         current_ir_graph = get_const_code_irg();
3893
3894         create_declaration_initializer(declaration);
3895
3896         assert(current_ir_graph == get_const_code_irg());
3897         current_ir_graph = old_current_ir_graph;
3898 }
3899
3900
3901
3902 static void return_statement_to_firm(return_statement_t *statement)
3903 {
3904         if (get_cur_block() == NULL)
3905                 return;
3906
3907         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3908         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3909
3910
3911         ir_node *in[1];
3912         int      in_len;
3913         if (get_method_n_ress(func_irtype) > 0) {
3914                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3915
3916                 if (statement->value != NULL) {
3917                         ir_node *node = expression_to_firm(statement->value);
3918                         node  = do_strict_conv(dbgi, node);
3919                         in[0] = node;
3920                 } else {
3921                         ir_mode *mode;
3922                         if (is_compound_type(res_type)) {
3923                                 mode = mode_P_data;
3924                         } else {
3925                                 mode = get_type_mode(res_type);
3926                         }
3927                         in[0] = new_Unknown(mode);
3928                 }
3929                 in_len = 1;
3930         } else {
3931                 /* build return_value for its side effects */
3932                 if (statement->value != NULL) {
3933                         expression_to_firm(statement->value);
3934                 }
3935                 in_len = 0;
3936         }
3937
3938         ir_node  *store = get_store();
3939         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3940
3941         ir_node *end_block = get_irg_end_block(current_ir_graph);
3942         add_immBlock_pred(end_block, ret);
3943
3944         set_cur_block(NULL);
3945 }
3946
3947 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3948 {
3949         if (get_cur_block() == NULL)
3950                 return NULL;
3951
3952         return expression_to_firm(statement->expression);
3953 }
3954
3955 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3956 {
3957         declaration_t *declaration = compound->scope.declarations;
3958         for( ; declaration != NULL; declaration = declaration->next) {
3959                 create_local_declaration(declaration);
3960         }
3961
3962         ir_node     *result    = NULL;
3963         statement_t *statement = compound->statements;
3964         for( ; statement != NULL; statement = statement->base.next) {
3965                 if (statement->base.next == NULL
3966                                 && statement->kind == STATEMENT_EXPRESSION) {
3967                         result = expression_statement_to_firm(
3968                                         &statement->expression);
3969                         break;
3970                 }
3971                 statement_to_firm(statement);
3972         }
3973
3974         return result;
3975 }
3976
3977 static void create_global_variable(declaration_t *declaration)
3978 {
3979         ir_visibility  vis;
3980         ir_type       *var_type;
3981         switch ((storage_class_tag_t)declaration->storage_class) {
3982                 case STORAGE_CLASS_STATIC:
3983                         vis = visibility_local;
3984                         goto global_var;
3985
3986                 case STORAGE_CLASS_EXTERN:
3987                         vis = visibility_external_allocated;
3988                         goto global_var;
3989
3990                 case STORAGE_CLASS_NONE:
3991                         vis = visibility_external_visible;
3992                         goto global_var;
3993
3994                 case STORAGE_CLASS_THREAD:
3995                         vis = visibility_external_visible;
3996                         goto tls_var;
3997
3998                 case STORAGE_CLASS_THREAD_EXTERN:
3999                         vis = visibility_external_allocated;
4000                         goto tls_var;
4001
4002                 case STORAGE_CLASS_THREAD_STATIC:
4003                         vis = visibility_local;
4004                         goto tls_var;
4005
4006 tls_var:
4007                         var_type = get_tls_type();
4008                         goto create_var;
4009
4010 global_var:
4011                         var_type = get_glob_type();
4012                         goto create_var;
4013
4014 create_var:
4015                         create_declaration_entity(declaration,
4016                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4017                                                   var_type);
4018                         if (!is_type_function(skip_typeref(declaration->type))) {
4019                                 set_entity_visibility(declaration->v.entity, vis);
4020                         }
4021
4022                         return;
4023
4024                 case STORAGE_CLASS_TYPEDEF:
4025                 case STORAGE_CLASS_AUTO:
4026                 case STORAGE_CLASS_REGISTER:
4027                 case STORAGE_CLASS_ENUM_ENTRY:
4028                         break;
4029         }
4030         panic("Invalid storage class for global variable");
4031 }
4032
4033 static void create_local_declaration(declaration_t *declaration)
4034 {
4035         if (declaration->namespc != NAMESPACE_NORMAL)
4036                 return;
4037         /* construct type */
4038         (void) get_ir_type(declaration->type);
4039         if (declaration->symbol == NULL) {
4040                 return;
4041         }
4042
4043         type_t *type = skip_typeref(declaration->type);
4044
4045         switch ((storage_class_tag_t) declaration->storage_class) {
4046         case STORAGE_CLASS_STATIC:
4047                 create_local_static_variable(declaration);
4048                 return;
4049         case STORAGE_CLASS_EXTERN:
4050                 create_global_variable(declaration);
4051                 create_declaration_initializer(declaration);
4052                 return;
4053         case STORAGE_CLASS_NONE:
4054         case STORAGE_CLASS_AUTO:
4055         case STORAGE_CLASS_REGISTER:
4056                 if (is_type_function(type)) {
4057                         if (declaration->init.statement != NULL) {
4058                                 panic("nested functions not supported yet");
4059                         } else {
4060                                 get_function_entity(declaration);
4061                         }
4062                 } else {
4063                         create_local_variable(declaration);
4064                 }
4065                 return;
4066         case STORAGE_CLASS_ENUM_ENTRY:
4067                 /* should already be handled */
4068                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4069                 return;
4070         case STORAGE_CLASS_TYPEDEF:
4071                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4072                 return;
4073         case STORAGE_CLASS_THREAD:
4074         case STORAGE_CLASS_THREAD_EXTERN:
4075         case STORAGE_CLASS_THREAD_STATIC:
4076                 break;
4077         }
4078         panic("invalid storage class found");
4079 }
4080
4081 static void initialize_local_declaration(declaration_t *declaration)
4082 {
4083         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4084                 return;
4085
4086         switch ((declaration_kind_t) declaration->declaration_kind) {
4087         case DECLARATION_KIND_LOCAL_VARIABLE:
4088         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4089                 create_declaration_initializer(declaration);
4090                 return;
4091
4092         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4093                 allocate_variable_length_array(declaration);
4094                 return;
4095
4096         case DECLARATION_KIND_LABEL_BLOCK:
4097         case DECLARATION_KIND_COMPOUND_MEMBER:
4098         case DECLARATION_KIND_GLOBAL_VARIABLE:
4099         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4100         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4101         case DECLARATION_KIND_FUNCTION:
4102         case DECLARATION_KIND_TYPE:
4103         case DECLARATION_KIND_ENUM_ENTRY:
4104                 return;
4105
4106         case DECLARATION_KIND_UNKNOWN:
4107                 panic("can't initialize unknwon declaration");
4108         }
4109         panic("invalid declaration kind");
4110 }
4111
4112 static void declaration_statement_to_firm(declaration_statement_t *statement)
4113 {
4114         declaration_t *declaration = statement->declarations_begin;
4115         declaration_t *end         = statement->declarations_end->next;
4116         for( ; declaration != end; declaration = declaration->next) {
4117                 if (declaration->namespc != NAMESPACE_NORMAL)
4118                         continue;
4119                 initialize_local_declaration(declaration);
4120         }
4121 }
4122
4123 static void if_statement_to_firm(if_statement_t *statement)
4124 {
4125         ir_node *cur_block = get_cur_block();
4126
4127         ir_node *fallthrough_block = NULL;
4128
4129         /* the true (blocks) */
4130         ir_node *true_block = NULL;
4131         if (statement->true_statement != NULL) {
4132                 true_block = new_immBlock();
4133                 statement_to_firm(statement->true_statement);
4134                 if (get_cur_block() != NULL) {
4135                         ir_node *jmp = new_Jmp();
4136                         if (fallthrough_block == NULL)
4137                                 fallthrough_block = new_immBlock();
4138                         add_immBlock_pred(fallthrough_block, jmp);
4139                 }
4140         }
4141
4142         /* the false (blocks) */
4143         ir_node *false_block = NULL;
4144         if (statement->false_statement != NULL) {
4145                 false_block = new_immBlock();
4146
4147                 statement_to_firm(statement->false_statement);
4148                 if (get_cur_block() != NULL) {
4149                         ir_node *jmp = new_Jmp();
4150                         if (fallthrough_block == NULL)
4151                                 fallthrough_block = new_immBlock();
4152                         add_immBlock_pred(fallthrough_block, jmp);
4153                 }
4154         }
4155
4156         /* create the condition */
4157         if (cur_block != NULL) {
4158                 if (true_block == NULL || false_block == NULL) {
4159                         if (fallthrough_block == NULL)
4160                                 fallthrough_block = new_immBlock();
4161                         if (true_block == NULL)
4162                                 true_block = fallthrough_block;
4163                         if (false_block == NULL)
4164                                 false_block = fallthrough_block;
4165                 }
4166
4167                 set_cur_block(cur_block);
4168                 create_condition_evaluation(statement->condition, true_block,
4169                                             false_block);
4170         }
4171
4172         mature_immBlock(true_block);
4173         if (false_block != fallthrough_block) {
4174                 mature_immBlock(false_block);
4175         }
4176         if (fallthrough_block != NULL) {
4177                 mature_immBlock(fallthrough_block);
4178         }
4179
4180         set_cur_block(fallthrough_block);
4181 }
4182
4183 static void while_statement_to_firm(while_statement_t *statement)
4184 {
4185         ir_node *jmp = NULL;
4186         if (get_cur_block() != NULL) {
4187                 jmp = new_Jmp();
4188         }
4189
4190         /* create the header block */
4191         ir_node *header_block = new_immBlock();
4192         if (jmp != NULL) {
4193                 add_immBlock_pred(header_block, jmp);
4194         }
4195
4196         /* the loop body */
4197         ir_node *old_continue_label = continue_label;
4198         ir_node *old_break_label    = break_label;
4199         continue_label              = header_block;
4200         break_label                 = NULL;
4201
4202         ir_node *body_block = new_immBlock();
4203         statement_to_firm(statement->body);
4204         ir_node *false_block = break_label;
4205
4206         assert(continue_label == header_block);
4207         continue_label = old_continue_label;
4208         break_label    = old_break_label;
4209
4210         if (get_cur_block() != NULL) {
4211                 jmp = new_Jmp();
4212                 add_immBlock_pred(header_block, jmp);
4213         }
4214
4215         /* shortcut for while(true) */
4216         if (is_constant_expression(statement->condition)
4217                         && fold_constant(statement->condition) != 0) {
4218                 set_cur_block(header_block);
4219                 ir_node *header_jmp = new_Jmp();
4220                 add_immBlock_pred(body_block, header_jmp);
4221
4222                 keep_alive(body_block);
4223         } else {
4224                 if (false_block == NULL) {
4225                         false_block = new_immBlock();
4226                 }
4227
4228                 /* create the condition */
4229                 set_cur_block(header_block);
4230
4231                 create_condition_evaluation(statement->condition, body_block,
4232                                             false_block);
4233         }
4234
4235         mature_immBlock(body_block);
4236         mature_immBlock(header_block);
4237         if (false_block != NULL) {
4238                 mature_immBlock(false_block);
4239         }
4240
4241         set_cur_block(false_block);
4242 }
4243
4244 static void do_while_statement_to_firm(do_while_statement_t *statement)
4245 {
4246         ir_node *jmp = NULL;
4247         if (get_cur_block() != NULL) {
4248                 jmp = new_Jmp();
4249         }
4250
4251         /* create the header block */
4252         ir_node *header_block = new_immBlock();
4253
4254         /* the loop body */
4255         ir_node *body_block = new_immBlock();
4256         if (jmp != NULL) {
4257                 add_immBlock_pred(body_block, jmp);
4258         }
4259
4260         ir_node *old_continue_label = continue_label;
4261         ir_node *old_break_label    = break_label;
4262         continue_label              = header_block;
4263         break_label                 = NULL;
4264
4265         statement_to_firm(statement->body);
4266         ir_node *false_block = break_label;
4267
4268         assert(continue_label == header_block);
4269         continue_label = old_continue_label;
4270         break_label    = old_break_label;
4271
4272         if (get_cur_block() != NULL) {
4273                 ir_node *body_jmp = new_Jmp();
4274                 add_immBlock_pred(header_block, body_jmp);
4275                 mature_immBlock(header_block);
4276         }
4277
4278         if (false_block == NULL) {
4279                 false_block = new_immBlock();
4280         }
4281
4282         /* create the condition */
4283         set_cur_block(header_block);
4284
4285         create_condition_evaluation(statement->condition, body_block, false_block);
4286         mature_immBlock(body_block);
4287         mature_immBlock(header_block);
4288         if (false_block != NULL) {
4289                 mature_immBlock(false_block);
4290         }
4291
4292         set_cur_block(false_block);
4293 }
4294
4295 static void for_statement_to_firm(for_statement_t *statement)
4296 {
4297         ir_node *jmp = NULL;
4298
4299         /* create declarations */
4300         declaration_t *declaration = statement->scope.declarations;
4301         for( ; declaration != NULL; declaration = declaration->next) {
4302                 create_local_declaration(declaration);
4303         }
4304         declaration = statement->scope.declarations;
4305         for( ; declaration != NULL; declaration = declaration->next) {
4306                 initialize_local_declaration(declaration);
4307         }
4308
4309         if (get_cur_block() != NULL) {
4310                 if (statement->initialisation != NULL) {
4311                         expression_to_firm(statement->initialisation);
4312                 }
4313
4314                 jmp = new_Jmp();
4315         }
4316
4317
4318         /* create the step block */
4319         ir_node *const step_block = new_immBlock();
4320         if (statement->step != NULL) {
4321                 expression_to_firm(statement->step);
4322         }
4323         ir_node *const step_jmp = new_Jmp();
4324
4325         /* create the header block */
4326         ir_node *const header_block = new_immBlock();
4327         if (jmp != NULL) {
4328                 add_immBlock_pred(header_block, jmp);
4329         }
4330         add_immBlock_pred(header_block, step_jmp);
4331
4332         /* the false block */
4333         ir_node *const false_block = new_immBlock();
4334
4335         /* the loop body */
4336         ir_node * body_block;
4337         if (statement->body != NULL) {
4338                 ir_node *const old_continue_label = continue_label;
4339                 ir_node *const old_break_label    = break_label;
4340                 continue_label = step_block;
4341                 break_label    = false_block;
4342
4343                 body_block = new_immBlock();
4344                 statement_to_firm(statement->body);
4345
4346                 assert(continue_label == step_block);
4347                 assert(break_label    == false_block);
4348                 continue_label = old_continue_label;
4349                 break_label    = old_break_label;
4350
4351                 if (get_cur_block() != NULL) {
4352                         jmp = new_Jmp();
4353                         add_immBlock_pred(step_block, jmp);
4354                 }
4355         } else {
4356                 body_block = step_block;
4357         }
4358
4359         /* create the condition */
4360         set_cur_block(header_block);
4361         if (statement->condition != NULL) {
4362                 create_condition_evaluation(statement->condition, body_block,
4363                                             false_block);
4364         } else {
4365                 keep_alive(header_block);
4366                 jmp = new_Jmp();
4367                 add_immBlock_pred(body_block, jmp);
4368         }
4369
4370         mature_immBlock(body_block);
4371         mature_immBlock(false_block);
4372         mature_immBlock(step_block);
4373         mature_immBlock(header_block);
4374         mature_immBlock(false_block);
4375
4376         set_cur_block(false_block);
4377 }
4378
4379 static void create_jump_statement(const statement_t *statement,
4380                                   ir_node *target_block)
4381 {
4382         if (get_cur_block() == NULL)
4383                 return;
4384
4385         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4386         ir_node  *jump = new_d_Jmp(dbgi);
4387         add_immBlock_pred(target_block, jump);
4388
4389         set_cur_block(NULL);
4390 }
4391
4392 static ir_node *get_break_label(void)
4393 {
4394         if (break_label == NULL) {
4395                 ir_node *cur_block = get_cur_block();
4396                 break_label = new_immBlock();
4397                 set_cur_block(cur_block);
4398         }
4399         return break_label;
4400 }
4401
4402 static void switch_statement_to_firm(const switch_statement_t *statement)
4403 {
4404         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4405
4406         ir_node *expression  = expression_to_firm(statement->expression);
4407         ir_node *cond        = new_d_Cond(dbgi, expression);
4408
4409         set_cur_block(NULL);
4410
4411         ir_node *const old_switch_cond       = current_switch_cond;
4412         ir_node *const old_break_label       = break_label;
4413         const bool     old_saw_default_label = saw_default_label;
4414         saw_default_label                    = false;
4415         current_switch_cond                  = cond;
4416         break_label                          = NULL;
4417
4418         if (statement->body != NULL) {
4419                 statement_to_firm(statement->body);
4420         }
4421
4422         if (get_cur_block() != NULL) {
4423                 ir_node *jmp = new_Jmp();
4424                 add_immBlock_pred(get_break_label(), jmp);
4425         }
4426
4427         if (!saw_default_label) {
4428                 set_cur_block(get_nodes_block(cond));
4429                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4430                                                         MAGIC_DEFAULT_PN_NUMBER);
4431                 add_immBlock_pred(get_break_label(), proj);
4432         }
4433
4434         if (break_label != NULL) {
4435                 mature_immBlock(break_label);
4436         }
4437         set_cur_block(break_label);
4438
4439         assert(current_switch_cond == cond);
4440         current_switch_cond = old_switch_cond;
4441         break_label         = old_break_label;
4442         saw_default_label   = old_saw_default_label;
4443 }
4444
4445 static void case_label_to_firm(const case_label_statement_t *statement)
4446 {
4447         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4448
4449         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4450
4451         /* let's create a node and hope firm constant folding creates a Const
4452          * node... */
4453         ir_node *proj;
4454         ir_node *old_block = get_nodes_block(current_switch_cond);
4455         ir_node *block     = new_immBlock();
4456
4457         set_cur_block(old_block);
4458         if (statement->expression != NULL) {
4459                 long start_pn = fold_constant(statement->expression);
4460                 long end_pn = start_pn;
4461                 if (statement->end_range != NULL) {
4462                         end_pn = fold_constant(statement->end_range);
4463                 }
4464                 assert(start_pn <= end_pn);
4465                 /* create jumps for all cases in the given range */
4466                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4467                         if (pn == MAGIC_DEFAULT_PN_NUMBER) {
4468                                 /* oops someone detected our cheating... */
4469                                 panic("magic default pn used");
4470                         }
4471                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4472                         add_immBlock_pred(block, proj);
4473                 }
4474         } else {
4475                 saw_default_label = true;
4476                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4477                                          MAGIC_DEFAULT_PN_NUMBER);
4478
4479                 add_immBlock_pred(block, proj);
4480         }
4481
4482         if (fallthrough != NULL) {
4483                 add_immBlock_pred(block, fallthrough);
4484         }
4485         mature_immBlock(block);
4486         set_cur_block(block);
4487
4488         if (statement->statement != NULL) {
4489                 statement_to_firm(statement->statement);
4490         }
4491 }
4492
4493 static ir_node *get_label_block(declaration_t *label)
4494 {
4495         assert(label->namespc == NAMESPACE_LABEL);
4496
4497         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4498                 return label->v.block;
4499         }
4500         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4501
4502         ir_node *old_cur_block = get_cur_block();
4503         ir_node *block         = new_immBlock();
4504         set_cur_block(old_cur_block);
4505
4506         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4507         label->v.block          = block;
4508
4509         ARR_APP1(ir_node *, imature_blocks, block);
4510
4511         return block;
4512 }
4513
4514 static void label_to_firm(const label_statement_t *statement)
4515 {
4516         ir_node *block = get_label_block(statement->label);
4517
4518         if (get_cur_block() != NULL) {
4519                 ir_node *jmp = new_Jmp();
4520                 add_immBlock_pred(block, jmp);
4521         }
4522
4523         set_cur_block(block);
4524         keep_alive(block);
4525
4526         if (statement->statement != NULL) {
4527                 statement_to_firm(statement->statement);
4528         }
4529 }
4530
4531 static void goto_to_firm(const goto_statement_t *statement)
4532 {
4533         if (get_cur_block() == NULL)
4534                 return;
4535
4536         ir_node *block = get_label_block(statement->label);
4537         ir_node *jmp   = new_Jmp();
4538         add_immBlock_pred(block, jmp);
4539
4540         set_cur_block(NULL);
4541 }
4542
4543 static void asm_statement_to_firm(const asm_statement_t *statement)
4544 {
4545         bool needs_memory = false;
4546
4547         if (statement->is_volatile) {
4548                 needs_memory = true;
4549         }
4550
4551         size_t         n_clobbers = 0;
4552         asm_clobber_t *clobber    = statement->clobbers;
4553         for( ; clobber != NULL; clobber = clobber->next) {
4554                 const char *clobber_str = clobber->clobber.begin;
4555
4556                 if (!be_is_valid_clobber(clobber_str)) {
4557                         errorf(&statement->base.source_position,
4558                                    "invalid clobber '%s' specified", clobber->clobber);
4559                         continue;
4560                 }
4561
4562                 if (strcmp(clobber_str, "memory") == 0) {
4563                         needs_memory = true;
4564                         continue;
4565                 }
4566
4567                 ident *id = new_id_from_str(clobber_str);
4568                 obstack_ptr_grow(&asm_obst, id);
4569                 ++n_clobbers;
4570         }
4571         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4572         ident **clobbers = NULL;
4573         if (n_clobbers > 0) {
4574                 clobbers = obstack_finish(&asm_obst);
4575         }
4576
4577         size_t n_inputs  = 0;
4578         asm_argument_t *argument = statement->inputs;
4579         for ( ; argument != NULL; argument = argument->next)
4580                 n_inputs++;
4581         size_t n_outputs = 0;
4582         argument = statement->outputs;
4583         for ( ; argument != NULL; argument = argument->next)
4584                 n_outputs++;
4585
4586         unsigned next_pos = 0;
4587
4588         ir_node *ins[n_inputs + n_outputs + 1];
4589         size_t   in_size = 0;
4590
4591         ir_asm_constraint *tmp_in_constraints
4592                 = xmalloc(n_outputs * sizeof(tmp_in_constraints[0]));
4593
4594         const expression_t *out_exprs[n_outputs];
4595         ir_node            *out_addrs[n_outputs];
4596         size_t              out_size = 0;
4597
4598         argument = statement->outputs;
4599         for ( ; argument != NULL; argument = argument->next) {
4600                 const char *constraints = argument->constraints.begin;
4601                 asm_constraint_flags_t asm_flags
4602                         = be_parse_asm_constraints(constraints);
4603
4604                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4605                         errorf(&statement->base.source_position,
4606                                "some constraints in '%s' are not supported", constraints);
4607                         continue;
4608                 }
4609                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4610                         errorf(&statement->base.source_position,
4611                                "some constraints in '%s' are invalid", constraints);
4612                         continue;
4613                 }
4614                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4615                         errorf(&statement->base.source_position,
4616                                "no write flag specified for output constraints '%s'",
4617                                constraints);
4618                         continue;
4619                 }
4620
4621                 unsigned pos = next_pos++;
4622                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4623                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4624                         expression_t *expr = argument->expression;
4625                         ir_node      *addr = expression_to_addr(expr);
4626                         /* in+output, construct an artifical same_as constraint on the
4627                          * input */
4628                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4629                                 char     buf[64];
4630                                 ir_node *value = get_value_from_lvalue(expr, addr);
4631
4632                                 snprintf(buf, sizeof(buf), "%d", pos);
4633
4634                                 ir_asm_constraint constraint;
4635                                 constraint.pos              = pos;
4636                                 constraint.constraint       = new_id_from_str(buf);
4637                                 constraint.mode             = get_ir_mode(expr->base.type);
4638                                 tmp_in_constraints[in_size] = constraint;
4639                                 ins[in_size] = value;
4640
4641                                 ++in_size;
4642                         }
4643
4644                         out_exprs[out_size] = expr;
4645                         out_addrs[out_size] = addr;
4646                         ++out_size;
4647                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4648                         /* pure memory ops need no input (but we have to make sure we
4649                          * attach to the memory) */
4650                         assert(! (asm_flags &
4651                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4652                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4653                         needs_memory = true;
4654
4655                         /* we need to attach the address to the inputs */
4656                         expression_t *expr = argument->expression;
4657
4658                         ir_asm_constraint constraint;
4659                         constraint.pos              = pos;
4660                         constraint.constraint       = new_id_from_str(constraints);
4661                         constraint.mode             = NULL;
4662                         tmp_in_constraints[in_size] = constraint;
4663
4664                         ins[in_size]          = expression_to_addr(expr);
4665                         ++in_size;
4666                         continue;
4667                 } else {
4668                         errorf(&statement->base.source_position,
4669                                "only modifiers but no place set in constraints '%s'",
4670                                constraints);
4671                         continue;
4672                 }
4673
4674                 ir_asm_constraint constraint;
4675                 constraint.pos        = pos;
4676                 constraint.constraint = new_id_from_str(constraints);
4677                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4678
4679                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4680         }
4681         assert(obstack_object_size(&asm_obst)
4682                         == out_size * sizeof(ir_asm_constraint));
4683         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4684
4685
4686         obstack_grow(&asm_obst, tmp_in_constraints,
4687                      in_size * sizeof(tmp_in_constraints[0]));
4688         free(tmp_in_constraints);
4689         /* find and count input and output arguments */
4690         argument = statement->inputs;
4691         for( ; argument != NULL; argument = argument->next) {
4692                 const char *constraints = argument->constraints.begin;
4693                 asm_constraint_flags_t asm_flags
4694                         = be_parse_asm_constraints(constraints);
4695
4696                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4697                         errorf(&statement->base.source_position,
4698                                "some constraints in '%s' are not supported", constraints);
4699                         continue;
4700                 }
4701                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4702                         errorf(&statement->base.source_position,
4703                                "some constraints in '%s' are invalid", constraints);
4704                         continue;
4705                 }
4706                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4707                         errorf(&statement->base.source_position,
4708                                "write flag specified for input constraints '%s'",
4709                                constraints);
4710                         continue;
4711                 }
4712
4713                 ir_node *input;
4714                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4715                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4716                         /* we can treat this as "normal" input */
4717                         input = expression_to_firm(argument->expression);
4718                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4719                         /* pure memory ops need no input (but we have to make sure we
4720                          * attach to the memory) */
4721                         assert(! (asm_flags &
4722                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4723                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4724                         needs_memory = true;
4725                         input = expression_to_addr(argument->expression);
4726                 } else {
4727                         errorf(&statement->base.source_position,
4728                                "only modifiers but no place set in constraints '%s'",
4729                                constraints);
4730                         continue;
4731                 }
4732
4733                 ir_asm_constraint constraint;
4734                 constraint.pos        = next_pos++;
4735                 constraint.constraint = new_id_from_str(constraints);
4736                 constraint.mode       = get_irn_mode(input);
4737
4738                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4739                 ins[in_size++] = input;
4740         }
4741
4742         if (needs_memory) {
4743                 ir_asm_constraint constraint;
4744                 constraint.pos        = next_pos++;
4745                 constraint.constraint = new_id_from_str("");
4746                 constraint.mode       = mode_M;
4747
4748                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4749                 ins[in_size++] = get_store();
4750         }
4751
4752         assert(obstack_object_size(&asm_obst)
4753                         == in_size * sizeof(ir_asm_constraint));
4754         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4755
4756         /* create asm node */
4757         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4758
4759         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4760
4761         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4762                                   out_size, output_constraints,
4763                                   n_clobbers, clobbers, asm_text);
4764
4765         if (statement->is_volatile) {
4766                 set_irn_pinned(node, op_pin_state_pinned);
4767         } else {
4768                 set_irn_pinned(node, op_pin_state_floats);
4769         }
4770
4771         /* create output projs & connect them */
4772         if (needs_memory) {
4773                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4774                 set_store(projm);
4775         }
4776
4777         size_t i;
4778         for (i = 0; i < out_size; ++i) {
4779                 const expression_t *out_expr = out_exprs[i];
4780                 long                pn       = i;
4781                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4782                 ir_node            *proj     = new_Proj(node, mode, pn);
4783                 ir_node            *addr     = out_addrs[i];
4784
4785                 set_value_for_expression_addr(out_expr, proj, addr);
4786         }
4787 }
4788
4789 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4790         statement_to_firm(statement->try_statement);
4791         warningf(&statement->base.source_position, "structured exception handling ignored");
4792 }
4793
4794 static void     leave_statement_to_firm(leave_statement_t *statement) {
4795         errorf(&statement->base.source_position, "__leave not supported yet");
4796 }
4797
4798 /**
4799  * Transform a statement.
4800  */
4801 static void statement_to_firm(statement_t *statement)
4802 {
4803 #ifndef NDEBUG
4804         assert(!statement->base.transformed);
4805         statement->base.transformed = true;
4806 #endif
4807
4808         switch(statement->kind) {
4809         case STATEMENT_INVALID:
4810                 panic("invalid statement found");
4811                 return;
4812         case STATEMENT_EMPTY:
4813                 /* nothing */
4814                 return;
4815         case STATEMENT_COMPOUND:
4816                 compound_statement_to_firm(&statement->compound);
4817                 return;
4818         case STATEMENT_RETURN:
4819                 return_statement_to_firm(&statement->returns);
4820                 return;
4821         case STATEMENT_EXPRESSION:
4822                 expression_statement_to_firm(&statement->expression);
4823                 return;
4824         case STATEMENT_IF:
4825                 if_statement_to_firm(&statement->ifs);
4826                 return;
4827         case STATEMENT_WHILE:
4828                 while_statement_to_firm(&statement->whiles);
4829                 return;
4830         case STATEMENT_DO_WHILE:
4831                 do_while_statement_to_firm(&statement->do_while);
4832                 return;
4833         case STATEMENT_DECLARATION:
4834                 declaration_statement_to_firm(&statement->declaration);
4835                 return;
4836         case STATEMENT_BREAK:
4837                 create_jump_statement(statement, get_break_label());
4838                 return;
4839         case STATEMENT_CONTINUE:
4840                 create_jump_statement(statement, continue_label);
4841                 return;
4842         case STATEMENT_SWITCH:
4843                 switch_statement_to_firm(&statement->switchs);
4844                 return;
4845         case STATEMENT_CASE_LABEL:
4846                 case_label_to_firm(&statement->case_label);
4847                 return;
4848         case STATEMENT_FOR:
4849                 for_statement_to_firm(&statement->fors);
4850                 return;
4851         case STATEMENT_LABEL:
4852                 label_to_firm(&statement->label);
4853                 return;
4854         case STATEMENT_GOTO:
4855                 goto_to_firm(&statement->gotos);
4856                 return;
4857         case STATEMENT_ASM:
4858                 asm_statement_to_firm(&statement->asms);
4859                 return;
4860         case STATEMENT_MS_TRY:
4861                 ms_try_statement_to_firm(&statement->ms_try);
4862                 return;
4863         case STATEMENT_LEAVE:
4864                 leave_statement_to_firm(&statement->leave);
4865                 return;
4866         }
4867         panic("Statement not implemented\n");
4868 }
4869
4870 static int count_decls_in_expression(const expression_t *expression);
4871
4872 static int count_local_declarations(const declaration_t *      decl,
4873                                     const declaration_t *const end)
4874 {
4875         int count = 0;
4876         for (; decl != end; decl = decl->next) {
4877                 if (decl->namespc != NAMESPACE_NORMAL)
4878                         continue;
4879                 type_t *type = skip_typeref(decl->type);
4880
4881                 if (!decl->address_taken && is_type_scalar(type))
4882                         ++count;
4883                 const initializer_t *initializer = decl->init.initializer;
4884                 /* FIXME: should walk initializer hierarchies... */
4885                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4886                         count += count_decls_in_expression(initializer->value.value);
4887                 }
4888         }
4889         return count;
4890 }
4891
4892 static int count_decls_in_expression(const expression_t *expression) {
4893         int count = 0;
4894
4895         if (expression == NULL)
4896                 return 0;
4897
4898         switch((expression_kind_t) expression->base.kind) {
4899         case EXPR_STATEMENT:
4900                 return count_decls_in_stmts(expression->statement.statement);
4901         EXPR_BINARY_CASES {
4902                 int count_left  = count_decls_in_expression(expression->binary.left);
4903                 int count_right = count_decls_in_expression(expression->binary.right);
4904                 return count_left + count_right;
4905         }
4906         EXPR_UNARY_CASES
4907                 return count_decls_in_expression(expression->unary.value);
4908         case EXPR_CALL: {
4909                 call_argument_t *argument = expression->call.arguments;
4910                 for( ; argument != NULL; argument = argument->next) {
4911                         count += count_decls_in_expression(argument->expression);
4912                 }
4913                 return count;
4914         }
4915
4916         case EXPR_UNKNOWN:
4917         case EXPR_INVALID:
4918                 panic("unexpected expression kind");
4919
4920         case EXPR_COMPOUND_LITERAL:
4921                 /* TODO... */
4922                 break;
4923
4924         case EXPR_CONDITIONAL:
4925                 count += count_decls_in_expression(expression->conditional.condition);
4926                 count += count_decls_in_expression(expression->conditional.true_expression);
4927                 count += count_decls_in_expression(expression->conditional.false_expression);
4928                 return count;
4929
4930         case EXPR_BUILTIN_PREFETCH:
4931                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4932                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4933                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4934                 return count;
4935
4936         case EXPR_BUILTIN_CONSTANT_P:
4937                 count += count_decls_in_expression(expression->builtin_constant.value);
4938                 return count;
4939
4940         case EXPR_SELECT:
4941                 count += count_decls_in_expression(expression->select.compound);
4942                 return count;
4943
4944         case EXPR_ARRAY_ACCESS:
4945                 count += count_decls_in_expression(expression->array_access.array_ref);
4946                 count += count_decls_in_expression(expression->array_access.index);
4947                 return count;
4948
4949         case EXPR_CLASSIFY_TYPE:
4950                 count += count_decls_in_expression(expression->classify_type.type_expression);
4951                 return count;
4952
4953         case EXPR_SIZEOF:
4954         case EXPR_ALIGNOF: {
4955                 expression_t *tp_expression = expression->typeprop.tp_expression;
4956                 if (tp_expression != NULL) {
4957                         count += count_decls_in_expression(tp_expression);
4958                 }
4959                 return count;
4960         }
4961
4962         case EXPR_OFFSETOF:
4963         case EXPR_REFERENCE:
4964         case EXPR_CONST:
4965         case EXPR_CHARACTER_CONSTANT:
4966         case EXPR_WIDE_CHARACTER_CONSTANT:
4967         case EXPR_STRING_LITERAL:
4968         case EXPR_WIDE_STRING_LITERAL:
4969         case EXPR_FUNCNAME:
4970         case EXPR_BUILTIN_SYMBOL:
4971         case EXPR_VA_START:
4972         case EXPR_VA_ARG:
4973                 break;
4974         }
4975
4976         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4977          * (or implement all the missing expressions here/implement a walker)
4978          */
4979
4980         return 0;
4981 }
4982
4983 static int count_decls_in_stmts(const statement_t *stmt)
4984 {
4985         int count = 0;
4986         for (; stmt != NULL; stmt = stmt->base.next) {
4987                 switch (stmt->kind) {
4988                         case STATEMENT_EMPTY:
4989                                 break;
4990
4991                         case STATEMENT_DECLARATION: {
4992                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4993                                 count += count_local_declarations(decl_stmt->declarations_begin,
4994                                                                   decl_stmt->declarations_end->next);
4995                                 break;
4996                         }
4997
4998                         case STATEMENT_COMPOUND: {
4999                                 const compound_statement_t *const comp =
5000                                         &stmt->compound;
5001                                 count += count_decls_in_stmts(comp->statements);
5002                                 break;
5003                         }
5004
5005                         case STATEMENT_IF: {
5006                                 const if_statement_t *const if_stmt = &stmt->ifs;
5007                                 count += count_decls_in_expression(if_stmt->condition);
5008                                 count += count_decls_in_stmts(if_stmt->true_statement);
5009                                 count += count_decls_in_stmts(if_stmt->false_statement);
5010                                 break;
5011                         }
5012
5013                         case STATEMENT_SWITCH: {
5014                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5015                                 count += count_decls_in_expression(switch_stmt->expression);
5016                                 count += count_decls_in_stmts(switch_stmt->body);
5017                                 break;
5018                         }
5019
5020                         case STATEMENT_LABEL: {
5021                                 const label_statement_t *const label_stmt = &stmt->label;
5022                                 if (label_stmt->statement != NULL) {
5023                                         count += count_decls_in_stmts(label_stmt->statement);
5024                                 }
5025                                 break;
5026                         }
5027
5028                         case STATEMENT_WHILE: {
5029                                 const while_statement_t *const while_stmt = &stmt->whiles;
5030                                 count += count_decls_in_expression(while_stmt->condition);
5031                                 count += count_decls_in_stmts(while_stmt->body);
5032                                 break;
5033                         }
5034
5035                         case STATEMENT_DO_WHILE: {
5036                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5037                                 count += count_decls_in_expression(do_while_stmt->condition);
5038                                 count += count_decls_in_stmts(do_while_stmt->body);
5039                                 break;
5040                         }
5041
5042                         case STATEMENT_FOR: {
5043                                 const for_statement_t *const for_stmt = &stmt->fors;
5044                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5045                                 count += count_decls_in_expression(for_stmt->initialisation);
5046                                 count += count_decls_in_expression(for_stmt->condition);
5047                                 count += count_decls_in_expression(for_stmt->step);
5048                                 count += count_decls_in_stmts(for_stmt->body);
5049                                 break;
5050                         }
5051
5052                         case STATEMENT_CASE_LABEL: {
5053                                 const case_label_statement_t *label = &stmt->case_label;
5054                                 count += count_decls_in_expression(label->expression);
5055                                 if (label->statement != NULL) {
5056                                         count += count_decls_in_stmts(label->statement);
5057                                 }
5058                                 break;
5059                         }
5060
5061                         case STATEMENT_ASM:
5062                         case STATEMENT_BREAK:
5063                         case STATEMENT_CONTINUE:
5064                                 break;
5065
5066                         case STATEMENT_EXPRESSION: {
5067                                 const expression_statement_t *expr_stmt = &stmt->expression;
5068                                 count += count_decls_in_expression(expr_stmt->expression);
5069                                 break;
5070                         }
5071
5072                         case STATEMENT_GOTO:
5073                         case STATEMENT_LEAVE:
5074                         case STATEMENT_INVALID:
5075                                 break;
5076
5077                         case STATEMENT_RETURN: {
5078                                 const return_statement_t *ret_stmt = &stmt->returns;
5079                                 count += count_decls_in_expression(ret_stmt->value);
5080                                 break;
5081                         }
5082
5083                         case STATEMENT_MS_TRY: {
5084                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5085                                 count += count_decls_in_stmts(try_stmt->try_statement);
5086                                 if (try_stmt->except_expression != NULL)
5087                                         count += count_decls_in_expression(try_stmt->except_expression);
5088                                 count += count_decls_in_stmts(try_stmt->final_statement);
5089                                 break;
5090                         }
5091                 }
5092         }
5093         return count;
5094 }
5095
5096 static int get_function_n_local_vars(declaration_t *declaration)
5097 {
5098         int count = 0;
5099
5100         /* count parameters */
5101         count += count_local_declarations(declaration->scope.declarations, NULL);
5102
5103         /* count local variables declared in body */
5104         count += count_decls_in_stmts(declaration->init.statement);
5105
5106         return count;
5107 }
5108
5109 static void initialize_function_parameters(declaration_t *declaration)
5110 {
5111         ir_graph        *irg             = current_ir_graph;
5112         ir_node         *args            = get_irg_args(irg);
5113         ir_node         *start_block     = get_irg_start_block(irg);
5114         ir_type         *function_irtype = get_ir_type(declaration->type);
5115
5116         int            n         = 0;
5117         declaration_t *parameter = declaration->scope.declarations;
5118         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5119                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5120                 type_t *type = skip_typeref(parameter->type);
5121
5122                 bool needs_entity = parameter->address_taken;
5123                 assert(!is_type_array(type));
5124                 if (is_type_compound(type)) {
5125                         needs_entity = true;
5126                 }
5127
5128                 if (needs_entity) {
5129                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5130                         ident     *id     = new_id_from_str(parameter->symbol->string);
5131                         set_entity_ident(entity, id);
5132
5133                         parameter->declaration_kind
5134                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5135                         parameter->v.entity = entity;
5136                         continue;
5137                 }
5138
5139                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5140                 ir_mode *param_mode   = get_type_mode(param_irtype);
5141
5142                 long     pn    = n;
5143                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5144
5145                 ir_mode *mode = get_ir_mode(type);
5146                 value = create_conv(NULL, value, mode);
5147                 value = do_strict_conv(NULL, value);
5148
5149                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5150                 parameter->v.value_number   = next_value_number_function;
5151                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5152                 ++next_value_number_function;
5153
5154                 set_value(parameter->v.value_number, value);
5155         }
5156 }
5157
5158 /**
5159  * Handle additional decl modifiers for IR-graphs
5160  *
5161  * @param irg            the IR-graph
5162  * @param dec_modifiers  additional modifiers
5163  */
5164 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5165 {
5166         if (decl_modifiers & DM_NORETURN) {
5167                 /* TRUE if the declaration includes the Microsoft
5168                    __declspec(noreturn) specifier. */
5169                 set_irg_additional_property(irg, mtp_property_noreturn);
5170         }
5171         if (decl_modifiers & DM_NOTHROW) {
5172                 /* TRUE if the declaration includes the Microsoft
5173                    __declspec(nothrow) specifier. */
5174                 set_irg_additional_property(irg, mtp_property_nothrow);
5175         }
5176         if (decl_modifiers & DM_NAKED) {
5177                 /* TRUE if the declaration includes the Microsoft
5178                    __declspec(naked) specifier. */
5179                 set_irg_additional_property(irg, mtp_property_naked);
5180         }
5181         if (decl_modifiers & DM_FORCEINLINE) {
5182                 /* TRUE if the declaration includes the
5183                    Microsoft __forceinline specifier. */
5184                 set_irg_inline_property(irg, irg_inline_forced);
5185         }
5186         if (decl_modifiers & DM_NOINLINE) {
5187                 /* TRUE if the declaration includes the Microsoft
5188                    __declspec(noinline) specifier. */
5189                 set_irg_inline_property(irg, irg_inline_forbidden);
5190         }
5191 }
5192
5193 static void add_function_pointer(ir_type *segment, ir_entity *method,
5194                                  const char *unique_template)
5195 {
5196         ir_type   *method_type  = get_entity_type(method);
5197         ident     *id           = id_unique(unique_template);
5198         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5199
5200         ident     *ide          = id_unique(unique_template);
5201         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5202         ir_graph  *irg          = get_const_code_irg();
5203         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5204                                                            method, NULL);
5205
5206         set_entity_compiler_generated(ptr, 1);
5207         set_entity_variability(ptr, variability_constant);
5208         set_atomic_ent_value(ptr, val);
5209 }
5210
5211 /**
5212  * Create code for a function.
5213  */
5214 static void create_function(declaration_t *declaration)
5215 {
5216         ir_entity *function_entity = get_function_entity(declaration);
5217
5218         if (declaration->init.statement == NULL)
5219                 return;
5220
5221         if (declaration->modifiers & DM_CONSTRUCTOR) {
5222                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5223                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5224         }
5225         if (declaration->modifiers & DM_DESTRUCTOR) {
5226                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5227                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5228         }
5229
5230         current_function_decl = declaration;
5231         current_function_name = NULL;
5232         current_funcsig       = NULL;
5233
5234         assert(imature_blocks == NULL);
5235         imature_blocks = NEW_ARR_F(ir_node*, 0);
5236
5237         int       n_local_vars = get_function_n_local_vars(declaration);
5238         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5239
5240         set_irg_fp_model(irg, firm_opt.fp_model);
5241         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5242         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5243
5244         ir_node *first_block = get_cur_block();
5245
5246         /* set inline flags */
5247         if (declaration->is_inline)
5248                 set_irg_inline_property(irg, irg_inline_recomended);
5249         handle_decl_modifier_irg(irg, declaration->modifiers);
5250
5251         next_value_number_function = 0;
5252         initialize_function_parameters(declaration);
5253
5254         statement_to_firm(declaration->init.statement);
5255
5256         ir_node *end_block = get_irg_end_block(irg);
5257
5258         /* do we have a return statement yet? */
5259         if (get_cur_block() != NULL) {
5260                 type_t *type = skip_typeref(declaration->type);
5261                 assert(is_type_function(type));
5262                 const function_type_t *func_type   = &type->function;
5263                 const type_t          *return_type
5264                         = skip_typeref(func_type->return_type);
5265
5266                 ir_node *ret;
5267                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5268                         ret = new_Return(get_store(), 0, NULL);
5269                 } else {
5270                         ir_mode *mode;
5271                         if (is_type_scalar(return_type)) {
5272                                 mode = get_ir_mode(func_type->return_type);
5273                         } else {
5274                                 mode = mode_P_data;
5275                         }
5276
5277                         ir_node *in[1];
5278                         /* §5.1.2.2.3 main implicitly returns 0 */
5279                         if (strcmp(declaration->symbol->string, "main") == 0) {
5280                                 in[0] = new_Const(mode, get_mode_null(mode));
5281                         } else {
5282                                 in[0] = new_Unknown(mode);
5283                                 if (warning.return_type) {
5284                                         warningf(&declaration->source_position,
5285                                                 "missing return statement at end of non-void function '%Y'",
5286                                                 declaration->symbol);
5287                                 }
5288                         }
5289                         ret = new_Return(get_store(), 1, in);
5290                 }
5291                 add_immBlock_pred(end_block, ret);
5292         }
5293
5294         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
5295                 mature_immBlock(imature_blocks[i]);
5296         }
5297         DEL_ARR_F(imature_blocks);
5298         imature_blocks = NULL;
5299
5300         mature_immBlock(first_block);
5301         mature_immBlock(end_block);
5302
5303         irg_finalize_cons(irg);
5304
5305         /* finalize the frame type */
5306         ir_type *frame_type = get_irg_frame_type(irg);
5307         int      n          = get_compound_n_members(frame_type);
5308         int      align_all  = 4;
5309         int      offset     = 0;
5310         for(int i = 0; i < n; ++i) {
5311                 ir_entity *entity      = get_compound_member(frame_type, i);
5312                 ir_type   *entity_type = get_entity_type(entity);
5313
5314                 int align = get_type_alignment_bytes(entity_type);
5315                 if (align > align_all)
5316                         align_all = align;
5317                 int misalign = 0;
5318                 if (align > 0) {
5319                         misalign  = offset % align;
5320                         if (misalign > 0) {
5321                                 offset += align - misalign;
5322                         }
5323                 }
5324
5325                 set_entity_offset(entity, offset);
5326                 offset += get_type_size_bytes(entity_type);
5327         }
5328         set_type_size_bytes(frame_type, offset);
5329         set_type_alignment_bytes(frame_type, align_all);
5330
5331         irg_vrfy(irg);
5332 }
5333
5334 static void scope_to_firm(scope_t *scope)
5335 {
5336         /* first pass: create declarations */
5337         declaration_t *declaration = scope->declarations;
5338         for( ; declaration != NULL; declaration = declaration->next) {
5339                 if (declaration->namespc != NAMESPACE_NORMAL)
5340                         continue;
5341                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5342                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5343                         continue;
5344                 if (declaration->symbol == NULL)
5345                         continue;
5346
5347                 type_t *type = skip_typeref(declaration->type);
5348                 if (is_type_function(type)) {
5349                         get_function_entity(declaration);
5350                 } else {
5351                         create_global_variable(declaration);
5352                 }
5353         }
5354
5355         /* second pass: create code/initializers */
5356         declaration = scope->declarations;
5357         for( ; declaration != NULL; declaration = declaration->next) {
5358                 if (declaration->namespc != NAMESPACE_NORMAL)
5359                         continue;
5360                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5361                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5362                         continue;
5363                 if (declaration->symbol == NULL)
5364                         continue;
5365
5366                 type_t *type = declaration->type;
5367                 if (type->kind == TYPE_FUNCTION) {
5368                         create_function(declaration);
5369                 } else {
5370                         assert(declaration->declaration_kind
5371                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5372                         current_ir_graph = get_const_code_irg();
5373                         create_declaration_initializer(declaration);
5374                 }
5375         }
5376 }
5377
5378 void init_ast2firm(void)
5379 {
5380         obstack_init(&asm_obst);
5381         init_atomic_modes();
5382
5383         id_underscore = new_id_from_chars("_", 1);
5384         id_imp        = new_id_from_chars("__imp_", 6);
5385
5386         /* OS option must be set to the backend */
5387         const char *s = "ia32-gasmode=linux";
5388         switch (firm_opt.os_support) {
5389         case OS_SUPPORT_MINGW:
5390                 create_ld_ident = create_ld_ident_win32;
5391                 s = "ia32-gasmode=mingw";
5392                 break;
5393         case OS_SUPPORT_LINUX:
5394                 create_ld_ident = create_ld_ident_linux_elf;
5395                 s = "ia32-gasmode=elf";
5396                 break;
5397         case OS_SUPPORT_MACHO:
5398                 create_ld_ident = create_ld_ident_macho;
5399                 s = "ia32-gasmode=macho";
5400                 break;
5401         }
5402         int res = firm_be_option(s);
5403         (void) res;
5404         assert(res);
5405
5406         /* create idents for all known runtime functions */
5407         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5408                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5409         }
5410
5411         entitymap_init(&entitymap);
5412 }
5413
5414 static void init_ir_types(void)
5415 {
5416         static int ir_types_initialized = 0;
5417         if (ir_types_initialized)
5418                 return;
5419         ir_types_initialized = 1;
5420
5421         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5422         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5423         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5424
5425         ir_type_int        = get_ir_type(type_int);
5426         ir_type_const_char = get_ir_type(type_const_char);
5427         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5428         ir_type_void       = get_ir_type(type_void);
5429 }
5430
5431 void exit_ast2firm(void)
5432 {
5433         entitymap_destroy(&entitymap);
5434         obstack_free(&asm_obst, NULL);
5435 }
5436
5437 static void global_asm_to_firm(statement_t *s)
5438 {
5439         for (; s != NULL; s = s->base.next) {
5440                 assert(s->kind == STATEMENT_ASM);
5441
5442                 char const *const text = s->asms.asm_text.begin;
5443                 size_t            size = s->asms.asm_text.size;
5444
5445                 /* skip the last \0 */
5446                 if (text[size - 1] == '\0')
5447                         --size;
5448
5449                 ident *const id = new_id_from_chars(text, size);
5450                 add_irp_asm(id);
5451         }
5452 }
5453
5454 void translation_unit_to_firm(translation_unit_t *unit)
5455 {
5456         /* just to be sure */
5457         continue_label      = NULL;
5458         break_label         = NULL;
5459         current_switch_cond = NULL;
5460
5461         init_ir_types();
5462
5463         scope_to_firm(&unit->scope);
5464         global_asm_to_firm(unit->global_asm);
5465 }