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 /* some idents needed for name mangling */
  48 static ident *id_underscore;
  49 static ident *id_imp;
  50
  51 static ir_type *ir_type_const_char;
  52 static ir_type *ir_type_wchar_t;
  53 static ir_type *ir_type_void;
  54 static ir_type *ir_type_int;
  55
  56 static int       next_value_number_function;
  57 static ir_node  *continue_label;
  58 static ir_node  *break_label;
  59 static ir_node  *current_switch_cond;
  60 static bool      saw_default_label;
  61 static ir_node **imature_blocks;
  62 static bool constant_folding;
  63
  64 static const declaration_t *current_function_decl;
  65 static ir_node             *current_function_name;
  66 static ir_node             *current_funcsig;
  67 static switch_statement_t  *current_switch;
  68
  69 static entitymap_t  entitymap;
  70
  71 static struct obstack asm_obst;
  72
  73 typedef enum declaration_kind_t {
  74         DECLARATION_KIND_UNKNOWN,
  75         DECLARATION_KIND_FUNCTION,
  76         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  77         DECLARATION_KIND_GLOBAL_VARIABLE,
  78         DECLARATION_KIND_LOCAL_VARIABLE,
  79         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  80         DECLARATION_KIND_COMPOUND_MEMBER,
  81         DECLARATION_KIND_LABEL_BLOCK,
  82         DECLARATION_KIND_ENUM_ENTRY,
  83         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  84         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  85         DECLARATION_KIND_TYPE
  86 } declaration_kind_t;
  87
  88 static ir_type *get_ir_type(type_t *type);
  89 static ir_type *get_ir_type_incomplete(type_t *type);
  90 static int count_decls_in_stmts(const statement_t *stmt);
  91
  92 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  93 {
  94         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  95
  96         if (declaration != NULL) {
  97                 warningf(&declaration->source_position,
  98                          "variable '%#T' might be used uninitialized",
  99                          declaration->type, declaration->symbol);
 100         }
 101         return new_r_Unknown(irg, mode);
 102 }
 103
 104 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 105 {
 106         const source_position_t *pos = (const source_position_t*) dbg;
 107         if (pos == NULL)
 108                 return 0;
 109         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 110                                    pos->linenr);
 111 }
 112
 113 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 114 {
 115         const source_position_t *pos = (const source_position_t*) dbg;
 116         if (pos == NULL)
 117                 return NULL;
 118         if (line != NULL)
 119                 *line = pos->linenr;
 120         return pos->input_name;
 121 }
 122
 123 static dbg_info *get_dbg_info(const source_position_t *pos)
 124 {
 125         return (dbg_info*) pos;
 126 }
 127
 128 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 129
 130 static ir_mode *mode_int, *mode_uint;
 131
 132 static ir_node *_expression_to_firm(const expression_t *expression);
 133 static ir_node *expression_to_firm(const expression_t *expression);
 134 static inline ir_mode *get_ir_mode(type_t *type);
 135 static void create_local_declaration(declaration_t *declaration);
 136
 137 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 138 {
 139         unsigned flags = get_atomic_type_flags(kind);
 140         unsigned size  = get_atomic_type_size(kind);
 141         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 142                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 143                 char            name[64];
 144                 ir_mode_sort    sort;
 145                 unsigned        bit_size     = size * 8;
 146                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 147                 ir_mode_arithmetic arithmetic;
 148                 unsigned        modulo_shift;
 149
 150                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 151                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 152                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 153                         sort         = irms_int_number;
 154                         arithmetic   = irma_twos_complement;
 155                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 156                 } else {
 157                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 158                         snprintf(name, sizeof(name), "f%d", bit_size);
 159                         sort         = irms_float_number;
 160                         arithmetic   = irma_ieee754;
 161                         modulo_shift = 0;
 162                 }
 163                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 164                                    modulo_shift);
 165         }
 166
 167         return NULL;
 168 }
 169
 170 /**
 171  * Initialises the atomic modes depending on the machine size.
 172  */
 173 static void init_atomic_modes(void)
 174 {
 175         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 176                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 177         }
 178         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 179         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 180
 181         /* there's no real void type in firm */
 182         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 183
 184         /* initialize pointer modes */
 185         char            name[64];
 186         ir_mode_sort    sort         = irms_reference;
 187         unsigned        bit_size     = machine_size;
 188         bool            is_signed    = 0;
 189         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 190         unsigned        modulo_shift
 191                 = bit_size < machine_size ? machine_size : bit_size;
 192
 193         snprintf(name, sizeof(name), "p%d", machine_size);
 194         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 195                                         modulo_shift);
 196
 197         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 198         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 199
 200         /* Hmm, pointers should be machine size */
 201         set_modeP_data(ptr_mode);
 202         set_modeP_code(ptr_mode);
 203 }
 204
 205 static unsigned get_compound_type_size(compound_type_t *type)
 206 {
 207         ir_type *irtype = get_ir_type((type_t*) type);
 208         return get_type_size_bytes(irtype);
 209 }
 210
 211 static unsigned get_array_type_size(array_type_t *type)
 212 {
 213         assert(!type->is_vla);
 214         ir_type *irtype = get_ir_type((type_t*) type);
 215         return get_type_size_bytes(irtype);
 216 }
 217
 218
 219 static unsigned get_type_size_const(type_t *type)
 220 {
 221         switch(type->kind) {
 222         case TYPE_ERROR:
 223                 panic("error type occurred");
 224         case TYPE_ATOMIC:
 225                 return get_atomic_type_size(type->atomic.akind);
 226         case TYPE_COMPLEX:
 227                 return 2 * get_atomic_type_size(type->complex.akind);
 228         case TYPE_IMAGINARY:
 229                 return get_atomic_type_size(type->imaginary.akind);
 230         case TYPE_ENUM:
 231                 return get_mode_size_bytes(mode_int);
 232         case TYPE_COMPOUND_UNION:
 233         case TYPE_COMPOUND_STRUCT:
 234                 return get_compound_type_size(&type->compound);
 235         case TYPE_FUNCTION:
 236                 /* just a pointer to the function */
 237                 return get_mode_size_bytes(mode_P_code);
 238         case TYPE_POINTER:
 239                 return get_mode_size_bytes(mode_P_data);
 240         case TYPE_ARRAY:
 241                 return get_array_type_size(&type->array);
 242         case TYPE_BUILTIN:
 243                 return get_type_size_const(type->builtin.real_type);
 244         case TYPE_BITFIELD:
 245                 panic("type size of bitfield request");
 246         case TYPE_TYPEDEF:
 247         case TYPE_TYPEOF:
 248         case TYPE_INVALID:
 249                 break;
 250         }
 251         panic("Trying to determine size of invalid type");
 252 }
 253
 254 static ir_node *get_type_size(type_t *type)
 255 {
 256         type = skip_typeref(type);
 257
 258         if (is_type_array(type) && type->array.is_vla) {
 259                 ir_node *size_node = type->array.size_node;
 260                 if (size_node == NULL) {
 261                         size_node = expression_to_firm(type->array.size_expression);
 262                         assert(!is_Const(size_node));
 263                         type->array.size_node = size_node;
 264                 }
 265
 266                 ir_node *elem_size = get_type_size(type->array.element_type);
 267                 ir_mode *mode      = get_irn_mode(size_node);
 268                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 269                 return real_size;
 270         }
 271
 272         ir_mode *mode = get_ir_mode(type_size_t);
 273         symconst_symbol sym;
 274         sym.type_p = get_ir_type(type);
 275         return new_SymConst(mode, sym, symconst_type_size);
 276 }
 277
 278 static unsigned count_parameters(const function_type_t *function_type)
 279 {
 280         unsigned count = 0;
 281
 282         function_parameter_t *parameter = function_type->parameters;
 283         for ( ; parameter != NULL; parameter = parameter->next) {
 284                 ++count;
 285         }
 286
 287         return count;
 288 }
 289
 290 /**
 291  * Creates a Firm type for an atomic type
 292  */
 293 static ir_type *create_atomic_type(const atomic_type_t *type)
 294 {
 295         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 296         atomic_type_kind_t  kind      = type->akind;
 297         ir_mode            *mode      = _atomic_modes[kind];
 298         ident              *id        = get_mode_ident(mode);
 299         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 300
 301         set_type_alignment_bytes(irtype, type->base.alignment);
 302
 303         return irtype;
 304 }
 305
 306 /**
 307  * Creates a Firm type for a complex type
 308  */
 309 static ir_type *create_complex_type(const complex_type_t *type)
 310 {
 311         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 312         atomic_type_kind_t  kind      = type->akind;
 313         ir_mode            *mode      = _atomic_modes[kind];
 314         ident              *id        = get_mode_ident(mode);
 315
 316         (void) id;
 317         (void) dbgi;
 318
 319         /* FIXME: finish the array */
 320         return NULL;
 321 }
 322
 323 /**
 324  * Creates a Firm type for an imaginary type
 325  */
 326 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 327 {
 328         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 329         atomic_type_kind_t  kind      = type->akind;
 330         ir_mode            *mode      = _atomic_modes[kind];
 331         ident              *id        = get_mode_ident(mode);
 332         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 333
 334         set_type_alignment_bytes(irtype, type->base.alignment);
 335
 336         return irtype;
 337 }
 338
 339 /**
 340  * return type of a parameter (and take transparent union gnu extension into
 341  * account)
 342  */
 343 static type_t *get_parameter_type(type_t *type)
 344 {
 345         type = skip_typeref(type);
 346         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 347                 declaration_t *decl = type->compound.declaration;
 348                 type                = decl->scope.declarations->type;
 349         }
 350
 351         return type;
 352 }
 353
 354 static ir_type *create_method_type(const function_type_t *function_type)
 355 {
 356         type_t  *return_type  = function_type->return_type;
 357
 358         ident   *id           = id_unique("functiontype.%u");
 359         int      n_parameters = count_parameters(function_type);
 360         int      n_results    = return_type == type_void ? 0 : 1;
 361         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 362         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 363
 364         if (return_type != type_void) {
 365                 ir_type *restype = get_ir_type(return_type);
 366                 set_method_res_type(irtype, 0, restype);
 367         }
 368
 369         function_parameter_t *parameter = function_type->parameters;
 370         int                   n         = 0;
 371         for ( ; parameter != NULL; parameter = parameter->next) {
 372                 type_t  *type     = get_parameter_type(parameter->type);
 373                 ir_type *p_irtype = get_ir_type(type);
 374                 set_method_param_type(irtype, n, p_irtype);
 375                 ++n;
 376         }
 377
 378         if (function_type->variadic || function_type->unspecified_parameters) {
 379                 set_method_variadicity(irtype, variadicity_variadic);
 380         }
 381
 382         unsigned cc = get_method_calling_convention(irtype);
 383         switch (function_type->calling_convention) {
 384         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 385         case CC_CDECL:
 386 is_cdecl:
 387                 set_method_calling_convention(irtype, SET_CDECL(cc));
 388                 break;
 389
 390         case CC_STDCALL:
 391                 if (function_type->variadic || function_type->unspecified_parameters)
 392                         goto is_cdecl;
 393
 394                 /* only non-variadic function can use stdcall, else use cdecl */
 395                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 396                 break;
 397
 398         case CC_FASTCALL:
 399                 if (function_type->variadic || function_type->unspecified_parameters)
 400                         goto is_cdecl;
 401                 /* only non-variadic function can use fastcall, else use cdecl */
 402                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 403                 break;
 404
 405         case CC_THISCALL:
 406                 /* Hmm, leave default, not accepted by the parser yet. */
 407                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 408                 break;
 409         }
 410         return irtype;
 411 }
 412
 413 static ir_type *create_pointer_type(pointer_type_t *type)
 414 {
 415         type_t   *points_to    = type->points_to;
 416         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 417         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 418         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 419                                                     ir_points_to, mode_P_data, dbgi);
 420
 421         return ir_type;
 422 }
 423
 424 static ir_type *create_array_type(array_type_t *type)
 425 {
 426         type_t  *element_type    = type->element_type;
 427         ir_type *ir_element_type = get_ir_type(element_type);
 428
 429         ident    *id      = id_unique("array.%u");
 430         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 431         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 432
 433         const int align = get_type_alignment_bytes(ir_element_type);
 434         set_type_alignment_bytes(ir_type, align);
 435
 436         if (type->size_constant) {
 437                 int n_elements = type->size;
 438
 439                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 440
 441                 size_t elemsize = get_type_size_bytes(ir_element_type);
 442                 if (elemsize % align > 0) {
 443                         elemsize += align - (elemsize % align);
 444                 }
 445                 set_type_size_bytes(ir_type, n_elements * elemsize);
 446         } else {
 447                 set_array_lower_bound_int(ir_type, 0, 0);
 448         }
 449         set_type_state(ir_type, layout_fixed);
 450
 451         return ir_type;
 452 }
 453
 454 /**
 455  * Return the signed integer type of size bits.
 456  *
 457  * @param size   the size
 458  */
 459 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 460                                                  unsigned size)
 461 {
 462         static ir_mode *s_modes[64 + 1] = {NULL, };
 463         ir_type *res;
 464         ir_mode *mode;
 465
 466         if (size <= 0 || size > 64)
 467                 return NULL;
 468
 469         mode = s_modes[size];
 470         if (mode == NULL) {
 471                 char name[32];
 472
 473                 snprintf(name, sizeof(name), "bf_I%u", size);
 474                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 475                                    size <= 32 ? 32 : size );
 476                 s_modes[size] = mode;
 477         }
 478
 479         char name[32];
 480         snprintf(name, sizeof(name), "I%u", size);
 481         ident *id = new_id_from_str(name);
 482         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 483         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 484         set_primitive_base_type(res, base_tp);
 485
 486         return res;
 487 }
 488
 489 /**
 490  * Return the unsigned integer type of size bits.
 491  *
 492  * @param size   the size
 493  */
 494 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 495                                                    unsigned size)
 496 {
 497         static ir_mode *u_modes[64 + 1] = {NULL, };
 498         ir_type *res;
 499         ir_mode *mode;
 500
 501         if (size <= 0 || size > 64)
 502                 return NULL;
 503
 504         mode = u_modes[size];
 505         if (mode == NULL) {
 506                 char name[32];
 507
 508                 snprintf(name, sizeof(name), "bf_U%u", size);
 509                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 510                                    size <= 32 ? 32 : size );
 511                 u_modes[size] = mode;
 512         }
 513
 514         char name[32];
 515
 516         snprintf(name, sizeof(name), "U%u", size);
 517         ident *id = new_id_from_str(name);
 518         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 519         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 520         set_primitive_base_type(res, base_tp);
 521
 522         return res;
 523 }
 524
 525 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 526 {
 527         type_t *base = skip_typeref(type->base_type);
 528         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 529         ir_type *irbase = get_ir_type(base);
 530
 531         unsigned size = fold_constant(type->size);
 532
 533         assert(!is_type_float(base));
 534         if (is_type_signed(base)) {
 535                 return get_signed_int_type_for_bit_size(irbase, size);
 536         } else {
 537                 return get_unsigned_int_type_for_bit_size(irbase, size);
 538         }
 539 }
 540
 541 #define INVALID_TYPE ((ir_type_ptr)-1)
 542
 543 enum {
 544         COMPOUND_IS_STRUCT = false,
 545         COMPOUND_IS_UNION  = true
 546 };
 547
 548 /**
 549  * Construct firm type from ast struct type.
 550  *
 551  * As anonymous inner structs get flattened to a single firm type, we might get
 552  * irtype, outer_offset and out_align passed (they represent the position of
 553  * the anonymous inner struct inside the resulting firm struct)
 554  */
 555 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 556                                      size_t *outer_offset, size_t *outer_align,
 557                                      bool incomplete, bool is_union)
 558 {
 559         declaration_t      *declaration = type->declaration;
 560         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 561
 562         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 563                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 564                                 && incomplete))
 565                 return declaration->v.irtype;
 566
 567         size_t align_all  = 1;
 568         size_t offset     = 0;
 569         size_t bit_offset = 0;
 570         size_t size       = 0;
 571
 572         if (irtype == NULL) {
 573                 symbol_t *symbol = declaration->symbol;
 574                 ident    *id;
 575                 if (symbol != NULL) {
 576                         id = new_id_from_str(symbol->string);
 577                 } else {
 578                         if (is_union) {
 579                                 id = id_unique("__anonymous_union.%u");
 580                         } else {
 581                                 id = id_unique("__anonymous_struct.%u");
 582                         }
 583                 }
 584                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 585
 586                 if (is_union) {
 587                         irtype = new_d_type_union(id, dbgi);
 588                 } else {
 589                         irtype = new_d_type_struct(id, dbgi);
 590                 }
 591
 592                 declaration->declaration_kind
 593                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 594                 declaration->v.irtype         = irtype;
 595                 //type->base.firm_type          = irtype;
 596         } else {
 597                 offset    = *outer_offset;
 598                 align_all = *outer_align;
 599         }
 600
 601         if (incomplete)
 602                 return irtype;
 603
 604         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 605
 606         declaration_t *entry = declaration->scope.declarations;
 607         for( ; entry != NULL; entry = entry->next) {
 608                 if (entry->namespc != NAMESPACE_NORMAL)
 609                         continue;
 610
 611                 size_t prev_offset = offset;
 612
 613                 symbol_t *symbol     = entry->symbol;
 614                 type_t   *entry_type = skip_typeref(entry->type);
 615                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 616
 617                 ident    *ident;
 618                 if (symbol != NULL) {
 619                         ident = new_id_from_str(symbol->string);
 620                 } else {
 621                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 622                                 create_compound_type(&entry_type->compound, irtype, &offset,
 623                                                      &align_all, false, COMPOUND_IS_STRUCT);
 624                                 goto finished_member;
 625                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 626                                 create_compound_type(&entry_type->compound, irtype, &offset,
 627                                                      &align_all, false, COMPOUND_IS_UNION);
 628                                 goto finished_member;
 629                         } else {
 630                                 assert(entry_type->kind == TYPE_BITFIELD);
 631                         }
 632                         ident = id_unique("anon.%u");
 633                 }
 634
 635                 ir_type *base_irtype;
 636                 if (entry_type->kind == TYPE_BITFIELD) {
 637                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 638                 } else {
 639                         base_irtype = get_ir_type(entry_type);
 640                 }
 641
 642                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 643                 size_t misalign        = offset % entry_alignment;
 644
 645                 ir_type   *entry_irtype = get_ir_type(entry_type);
 646                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 647
 648                 size_t base;
 649                 size_t bits_remainder;
 650                 if (entry_type->kind == TYPE_BITFIELD) {
 651                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 652                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 653
 654                         if (size_bits > rest_size_bits) {
 655                                 /* start a new bucket */
 656                                 offset     += entry_alignment - misalign;
 657                                 bit_offset  = 0;
 658
 659                                 base           = offset;
 660                                 bits_remainder = 0;
 661                         } else {
 662                                 /* put into current bucket */
 663                                 base           = offset - misalign;
 664                                 bits_remainder = misalign * 8 + bit_offset;
 665                         }
 666
 667                         offset     += size_bits / 8;
 668                         bit_offset  = bit_offset + (size_bits % 8);
 669                 } else {
 670                         size_t entry_size = get_type_size_bytes(base_irtype);
 671                         if (misalign > 0 || bit_offset > 0)
 672                                 offset += entry_alignment - misalign;
 673
 674                         base           = offset;
 675                         bits_remainder = 0;
 676                         offset        += entry_size;
 677                         bit_offset     = 0;
 678                 }
 679
 680                 if (entry_alignment > align_all) {
 681                         if (entry_alignment % align_all != 0) {
 682                                 panic("uneven alignments not supported yet");
 683                         }
 684                         align_all = entry_alignment;
 685                 }
 686
 687                 set_entity_offset(entity, base);
 688                 set_entity_offset_bits_remainder(entity,
 689                                                  (unsigned char) bits_remainder);
 690                 //add_struct_member(irtype, entity);
 691                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 692                 assert(entry->v.entity == NULL);
 693                 entry->v.entity         = entity;
 694
 695 finished_member:
 696                 if (is_union) {
 697                         size_t entry_size = offset - prev_offset;
 698                         if (entry_size > size) {
 699                                 size = entry_size;
 700                         }
 701                         offset     = 0;
 702                         bit_offset = 0;
 703                 }
 704         }
 705
 706         if (!is_union) {
 707                 size = offset;
 708         }
 709
 710         size_t misalign = offset % align_all;
 711         if (misalign > 0 || bit_offset > 0) {
 712                 size += align_all - misalign;
 713         }
 714
 715         if (outer_offset != NULL) {
 716                 if (!is_union) {
 717                         *outer_offset = offset;
 718                 } else {
 719                         *outer_offset += size;
 720                 }
 721
 722                 if (align_all > *outer_align) {
 723                         if (align_all % *outer_align != 0) {
 724                                 panic("uneven alignments not supported yet");
 725                         }
 726                         *outer_align = align_all;
 727                 }
 728         } else {
 729                 set_type_alignment_bytes(irtype, align_all);
 730                 set_type_size_bytes(irtype, size);
 731                 set_type_state(irtype, layout_fixed);
 732         }
 733
 734         return irtype;
 735 }
 736
 737 static ir_type *create_enum_type(enum_type_t *const type)
 738 {
 739         type->base.firm_type = ir_type_int;
 740
 741         ir_mode *const mode    = mode_int;
 742         tarval  *const one     = get_mode_one(mode);
 743         tarval  *      tv_next = get_tarval_null(mode);
 744
 745         bool constant_folding_old = constant_folding;
 746         constant_folding = true;
 747
 748         declaration_t *declaration = type->declaration->next;
 749         for (; declaration != NULL; declaration = declaration->next) {
 750                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 751                         break;
 752
 753                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 754
 755                 expression_t *const init = declaration->init.enum_value;
 756                 if (init != NULL) {
 757                         ir_node *const cnst = expression_to_firm(init);
 758                         if (!is_Const(cnst)) {
 759                                 panic("couldn't fold constant");
 760                         }
 761                         tv_next = get_Const_tarval(cnst);
 762                 }
 763                 declaration->v.enum_val = tv_next;
 764                 tv_next = tarval_add(tv_next, one);
 765         }
 766
 767         constant_folding = constant_folding_old;
 768
 769         return ir_type_int;
 770 }
 771
 772 static ir_type *get_ir_type_incomplete(type_t *type)
 773 {
 774         assert(type != NULL);
 775         type = skip_typeref(type);
 776
 777         if (type->base.firm_type != NULL) {
 778                 assert(type->base.firm_type != INVALID_TYPE);
 779                 return type->base.firm_type;
 780         }
 781
 782         switch (type->kind) {
 783         case TYPE_COMPOUND_STRUCT:
 784                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 785                                             true, COMPOUND_IS_STRUCT);
 786         case TYPE_COMPOUND_UNION:
 787                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 788                                             true, COMPOUND_IS_UNION);
 789         default:
 790                 return get_ir_type(type);
 791         }
 792 }
 793
 794 static ir_type *get_ir_type(type_t *type)
 795 {
 796         assert(type != NULL);
 797
 798         type = skip_typeref(type);
 799
 800         if (type->base.firm_type != NULL) {
 801                 assert(type->base.firm_type != INVALID_TYPE);
 802                 return type->base.firm_type;
 803         }
 804
 805         ir_type *firm_type = NULL;
 806         switch (type->kind) {
 807         case TYPE_ERROR:
 808                 panic("error type occurred");
 809         case TYPE_ATOMIC:
 810                 firm_type = create_atomic_type(&type->atomic);
 811                 break;
 812         case TYPE_COMPLEX:
 813                 firm_type = create_complex_type(&type->complex);
 814                 break;
 815         case TYPE_IMAGINARY:
 816                 firm_type = create_imaginary_type(&type->imaginary);
 817                 break;
 818         case TYPE_FUNCTION:
 819                 firm_type = create_method_type(&type->function);
 820                 break;
 821         case TYPE_POINTER:
 822                 firm_type = create_pointer_type(&type->pointer);
 823                 break;
 824         case TYPE_ARRAY:
 825                 firm_type = create_array_type(&type->array);
 826                 break;
 827         case TYPE_COMPOUND_STRUCT:
 828                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 829                                                  false, COMPOUND_IS_STRUCT);
 830                 break;
 831         case TYPE_COMPOUND_UNION:
 832                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 833                                                  false, COMPOUND_IS_UNION);
 834                 break;
 835         case TYPE_ENUM:
 836                 firm_type = create_enum_type(&type->enumt);
 837                 break;
 838         case TYPE_BUILTIN:
 839                 firm_type = get_ir_type(type->builtin.real_type);
 840                 break;
 841         case TYPE_BITFIELD:
 842                 firm_type = create_bitfield_type(&type->bitfield);
 843                 break;
 844
 845         case TYPE_TYPEOF:
 846         case TYPE_TYPEDEF:
 847         case TYPE_INVALID:
 848                 break;
 849         }
 850         if (firm_type == NULL)
 851                 panic("unknown type found");
 852
 853         type->base.firm_type = firm_type;
 854         return firm_type;
 855 }
 856
 857 static inline ir_mode *get_ir_mode(type_t *type)
 858 {
 859         ir_type *irtype = get_ir_type(type);
 860
 861         /* firm doesn't report a mode for arrays somehow... */
 862         if (is_Array_type(irtype)) {
 863                 return mode_P_data;
 864         }
 865
 866         ir_mode *mode = get_type_mode(irtype);
 867         assert(mode != NULL);
 868         return mode;
 869 }
 870
 871 /** Names of the runtime functions. */
 872 static const struct {
 873         int        id;           /**< the rts id */
 874         int        n_res;        /**< number of return values */
 875         const char *name;        /**< the name of the rts function */
 876         int        n_params;     /**< number of parameters */
 877         unsigned   flags;        /**< language flags */
 878 } rts_data[] = {
 879         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 880         { rts_abort,      0, "abort",        0, _C89 },
 881         { rts_alloca,     1, "alloca",       1, _ALL },
 882         { rts_abs,        1, "abs",          1, _C89 },
 883         { rts_labs,       1, "labs",         1, _C89 },
 884         { rts_llabs,      1, "llabs",        1, _C99 },
 885         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 886
 887         { rts_fabs,       1, "fabs",         1, _C89 },
 888         { rts_sqrt,       1, "sqrt",         1, _C89 },
 889         { rts_cbrt,       1, "cbrt",         1, _C99 },
 890         { rts_exp,        1, "exp",          1, _C89 },
 891         { rts_exp2,       1, "exp2",         1, _C89 },
 892         { rts_exp10,      1, "exp10",        1, _GNUC },
 893         { rts_log,        1, "log",          1, _C89 },
 894         { rts_log2,       1, "log2",         1, _C89 },
 895         { rts_log10,      1, "log10",        1, _C89 },
 896         { rts_pow,        1, "pow",          2, _C89 },
 897         { rts_sin,        1, "sin",          1, _C89 },
 898         { rts_cos,        1, "cos",          1, _C89 },
 899         { rts_tan,        1, "tan",          1, _C89 },
 900         { rts_asin,       1, "asin",         1, _C89 },
 901         { rts_acos,       1, "acos",         1, _C89 },
 902         { rts_atan,       1, "atan",         1, _C89 },
 903         { rts_sinh,       1, "sinh",         1, _C89 },
 904         { rts_cosh,       1, "cosh",         1, _C89 },
 905         { rts_tanh,       1, "tanh",         1, _C89 },
 906
 907         { rts_fabsf,      1, "fabsf",        1, _C99 },
 908         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 909         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 910         { rts_expf,       1, "expf",         1, _C99 },
 911         { rts_exp2f,      1, "exp2f",        1, _C99 },
 912         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 913         { rts_logf,       1, "logf",         1, _C99 },
 914         { rts_log2f,      1, "log2f",        1, _C99 },
 915         { rts_log10f,     1, "log10f",       1, _C99 },
 916         { rts_powf,       1, "powf",         2, _C99 },
 917         { rts_sinf,       1, "sinf",         1, _C99 },
 918         { rts_cosf,       1, "cosf",         1, _C99 },
 919         { rts_tanf,       1, "tanf",         1, _C99 },
 920         { rts_asinf,      1, "asinf",        1, _C99 },
 921         { rts_acosf,      1, "acosf",        1, _C99 },
 922         { rts_atanf,      1, "atanf",        1, _C99 },
 923         { rts_sinhf,      1, "sinhf",        1, _C99 },
 924         { rts_coshf,      1, "coshf",        1, _C99 },
 925         { rts_tanhf,      1, "tanhf",        1, _C99 },
 926
 927         { rts_fabsl,      1, "fabsl",        1, _C99 },
 928         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 929         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 930         { rts_expl,       1, "expl",         1, _C99 },
 931         { rts_exp2l,      1, "exp2l",        1, _C99 },
 932         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 933         { rts_logl,       1, "logl",         1, _C99 },
 934         { rts_log2l,      1, "log2l",        1, _C99 },
 935         { rts_log10l,     1, "log10l",       1, _C99 },
 936         { rts_powl,       1, "powl",         2, _C99 },
 937         { rts_sinl,       1, "sinl",         1, _C99 },
 938         { rts_cosl,       1, "cosl",         1, _C99 },
 939         { rts_tanl,       1, "tanl",         1, _C99 },
 940         { rts_asinl,      1, "asinl",        1, _C99 },
 941         { rts_acosl,      1, "acosl",        1, _C99 },
 942         { rts_atanl,      1, "atanl",        1, _C99 },
 943         { rts_sinhl,      1, "sinhl",        1, _C99 },
 944         { rts_coshl,      1, "coshl",        1, _C99 },
 945         { rts_tanhl,      1, "tanhl",        1, _C99 },
 946
 947         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 948         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 949         { rts_strcmp,     1, "strcmp",       2, _C89 },
 950         { rts_strncmp,    1, "strncmp",      3, _C89 }
 951 };
 952
 953 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 954
 955 /**
 956  * Mangles an entity linker (ld) name for win32 usage.
 957  *
 958  * @param ent          the entity to be mangled
 959  * @param declaration  the declaration
 960  */
 961 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 962 {
 963         ident *id;
 964
 965         if (is_Method_type(get_entity_type(ent)))
 966                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 967         else {
 968                 /* always add an underscore in win32 */
 969                 id = mangle(id_underscore, get_entity_ident(ent));
 970         }
 971
 972         decl_modifiers_t decl_modifiers = declaration->modifiers;
 973         if (decl_modifiers & DM_DLLIMPORT) {
 974                 /* add prefix for imported symbols */
 975                 id = mangle(id_imp, id);
 976         }
 977         return id;
 978 }
 979
 980 /**
 981  * Mangles an entity linker (ld) name for Linux ELF usage.
 982  *
 983  * @param ent          the entity to be mangled
 984  * @param declaration  the declaration
 985  */
 986 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 987                                         declaration_t *declaration)
 988 {
 989         (void) declaration;
 990         return get_entity_ident(entity);
 991 }
 992
 993 /**
 994  * Mangles an entity linker (ld) name for Mach-O usage.
 995  *
 996  * @param ent          the entity to be mangled
 997  * @param declaration  the declaration
 998  */
 999 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1000 {
1001         (void) declaration;
1002         ident *id = mangle(id_underscore, get_entity_ident(ent));
1003         return id;
1004 }
1005
1006 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1007                                        declaration_t *declaration);
1008 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1009
1010 /**
1011  * Handle GNU attributes for entities
1012  *
1013  * @param ent   the entity
1014  * @param decl  the routine declaration
1015  */
1016 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1017 {
1018         if (decl->modifiers & DM_PURE) {
1019                 /* TRUE if the declaration includes the GNU
1020                    __attribute__((pure)) specifier. */
1021                 set_entity_additional_property(ent, mtp_property_pure);
1022         }
1023         if (decl->modifiers & DM_USED) {
1024                 /* TRUE if the declaration includes the GNU
1025                    __attribute__((used)) specifier. */
1026                 set_entity_stickyness(ent, stickyness_sticky);
1027         }
1028 }
1029
1030 /**
1031  * Creates an entity representing a function.
1032  *
1033  * @param declaration  the function declaration
1034  */
1035 static ir_entity *get_function_entity(declaration_t *declaration)
1036 {
1037         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
1038                 return declaration->v.entity;
1039         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1040
1041         symbol_t *symbol = declaration->symbol;
1042         ident    *id     = new_id_from_str(symbol->string);
1043
1044         ir_type  *global_type    = get_glob_type();
1045         ir_type  *ir_type_method = get_ir_type(declaration->type);
1046         assert(is_Method_type(ir_type_method));
1047
1048         /* already an entity defined? */
1049         ir_entity *entity = entitymap_get(&entitymap, symbol);
1050         if (entity != NULL) {
1051                 if (get_entity_visibility(entity) == visibility_external_allocated
1052                                 && declaration->init.statement != NULL) {
1053                         set_entity_visibility(entity, visibility_external_visible);
1054                 }
1055                 goto entity_created;
1056         }
1057
1058         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1059         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1060         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1061
1062         handle_gnu_attributes_ent(entity, declaration);
1063
1064         /* static inline             => local
1065          * extern inline             => local
1066          * inline without definition => local
1067          * inline with definition    => external_visible */
1068         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1069         bool                const is_inline     = declaration->is_inline;
1070         bool                const has_body      = declaration->init.statement != NULL;
1071         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1072                 set_entity_visibility(entity, visibility_external_visible);
1073         } else if (storage_class == STORAGE_CLASS_STATIC ||
1074                    (is_inline && has_body)) {
1075                 if (!has_body) {
1076                         /* this entity was declared, but is defined nowhere */
1077                         set_entity_peculiarity(entity, peculiarity_description);
1078                 }
1079                 set_entity_visibility(entity, visibility_local);
1080         } else if (has_body) {
1081                 set_entity_visibility(entity, visibility_external_visible);
1082         } else {
1083                 set_entity_visibility(entity, visibility_external_allocated);
1084         }
1085         set_entity_allocation(entity, allocation_static);
1086
1087         /* We should check for file scope here, but as long as we compile C only
1088            this is not needed. */
1089         if (! firm_opt.freestanding) {
1090                 /* check for a known runtime function */
1091                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1092                         if (id != rts_idents[i])
1093                                 continue;
1094
1095                         /* ignore those rts functions not necessary needed for current mode */
1096                         if ((c_mode & rts_data[i].flags) == 0)
1097                                 continue;
1098                         assert(rts_entities[rts_data[i].id] == NULL);
1099                         rts_entities[rts_data[i].id] = entity;
1100                 }
1101         }
1102
1103         entitymap_insert(&entitymap, symbol, entity);
1104
1105 entity_created:
1106         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1107         declaration->v.entity         = entity;
1108
1109         return entity;
1110 }
1111
1112 /**
1113  * Creates a Const node representing a constant.
1114  */
1115 static ir_node *const_to_firm(const const_expression_t *cnst)
1116 {
1117         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1118         ir_mode  *mode = get_ir_mode(cnst->base.type);
1119
1120         char    buf[128];
1121         tarval *tv;
1122         size_t  len;
1123         if (mode_is_float(mode)) {
1124                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1125         } else {
1126                 if (mode_is_signed(mode)) {
1127                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1128                 } else {
1129                         len = snprintf(buf, sizeof(buf), "%llu",
1130                                        (unsigned long long) cnst->v.int_value);
1131                 }
1132                 tv = new_tarval_from_str(buf, len, mode);
1133         }
1134
1135         return new_d_Const(dbgi, mode, tv);
1136 }
1137
1138 /**
1139  * Creates a Const node representing a character constant.
1140  */
1141 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1142 {
1143         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1144         ir_mode  *mode = get_ir_mode(cnst->base.type);
1145
1146         long long int v = 0;
1147         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1148                 if (char_is_signed) {
1149                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1150                 } else {
1151                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1152                 }
1153         }
1154         char    buf[128];
1155         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1156         tarval *tv = new_tarval_from_str(buf, len, mode);
1157
1158         return new_d_Const(dbgi, mode, tv);
1159 }
1160
1161 /**
1162  * Creates a Const node representing a wide character constant.
1163  */
1164 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1165 {
1166         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1167         ir_mode  *mode = get_ir_mode(cnst->base.type);
1168
1169         long long int v = cnst->v.wide_character.begin[0];
1170
1171         char    buf[128];
1172         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1173         tarval *tv = new_tarval_from_str(buf, len, mode);
1174
1175         return new_d_Const(dbgi, mode, tv);
1176 }
1177
1178 /**
1179  * Creates a SymConst for a given entity.
1180  *
1181  * @param dbgi    debug info
1182  * @param mode    the (reference) mode for the SymConst
1183  * @param entity  the entity
1184  */
1185 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1186                               ir_entity *entity)
1187 {
1188         assert(entity != NULL);
1189         union symconst_symbol sym;
1190         sym.entity_p = entity;
1191         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1192 }
1193
1194 /**
1195  * Creates a SymConst node representing a string constant.
1196  *
1197  * @param src_pos    the source position of the string constant
1198  * @param id_prefix  a prefix for the name of the generated string constant
1199  * @param value      the value of the string constant
1200  */
1201 static ir_node *string_to_firm(const source_position_t *const src_pos,
1202                                const char *const id_prefix,
1203                                const string_t *const value)
1204 {
1205         ir_type  *const global_type = get_glob_type();
1206         dbg_info *const dbgi        = get_dbg_info(src_pos);
1207         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1208                                                        ir_type_const_char, dbgi);
1209
1210         ident     *const id     = id_unique(id_prefix);
1211         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1212         set_entity_ld_ident(entity, id);
1213         set_entity_variability(entity, variability_constant);
1214         set_entity_allocation(entity, allocation_static);
1215
1216         ir_type *const elem_type = ir_type_const_char;
1217         ir_mode *const mode      = get_type_mode(elem_type);
1218
1219         const char* const string = value->begin;
1220         const size_t      slen   = value->size;
1221
1222         set_array_lower_bound_int(type, 0, 0);
1223         set_array_upper_bound_int(type, 0, slen);
1224         set_type_size_bytes(type, slen);
1225         set_type_state(type, layout_fixed);
1226
1227         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1228         for(size_t i = 0; i < slen; ++i) {
1229                 tvs[i] = new_tarval_from_long(string[i], mode);
1230         }
1231
1232         set_array_entity_values(entity, tvs, slen);
1233         free(tvs);
1234
1235         return create_symconst(dbgi, mode_P_data, entity);
1236 }
1237
1238 /**
1239  * Creates a SymConst node representing a string literal.
1240  *
1241  * @param literal   the string literal
1242  */
1243 static ir_node *string_literal_to_firm(
1244                 const string_literal_expression_t* literal)
1245 {
1246         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1247                               &literal->value);
1248 }
1249
1250 /**
1251  * Creates a SymConst node representing a wide string literal.
1252  *
1253  * @param literal   the wide string literal
1254  */
1255 static ir_node *wide_string_literal_to_firm(
1256         const wide_string_literal_expression_t* const literal)
1257 {
1258         ir_type *const global_type = get_glob_type();
1259         ir_type *const elem_type   = ir_type_wchar_t;
1260         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1261         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1262                                                     elem_type, dbgi);
1263
1264         ident     *const id     = id_unique("Lstr.%u");
1265         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1266         set_entity_ld_ident(entity, id);
1267         set_entity_variability(entity, variability_constant);
1268         set_entity_allocation(entity, allocation_static);
1269
1270         ir_mode *const mode      = get_type_mode(elem_type);
1271
1272         const wchar_rep_t *const string = literal->value.begin;
1273         const size_t             slen   = literal->value.size;
1274
1275         set_array_lower_bound_int(type, 0, 0);
1276         set_array_upper_bound_int(type, 0, slen);
1277         set_type_size_bytes(type, slen);
1278         set_type_state(type, layout_fixed);
1279
1280         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1281         for(size_t i = 0; i < slen; ++i) {
1282                 tvs[i] = new_tarval_from_long(string[i], mode);
1283         }
1284
1285         set_array_entity_values(entity, tvs, slen);
1286         free(tvs);
1287
1288         return create_symconst(dbgi, mode_P_data, entity);
1289 }
1290
1291 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1292                                       ir_node *const addr)
1293 {
1294         ir_type *irtype = get_ir_type(type);
1295         if (is_compound_type(irtype)
1296                         || is_Method_type(irtype)
1297                         || is_Array_type(irtype)) {
1298                 return addr;
1299         }
1300
1301         ir_mode *const mode     = get_type_mode(irtype);
1302         ir_node *const memory   = get_store();
1303         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1304         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1305         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1306
1307         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1308                 set_Load_volatility(load, volatility_is_volatile);
1309         }
1310
1311         set_store(load_mem);
1312         return load_res;
1313 }
1314
1315 /**
1316  * Creates a strict Conv if neccessary.
1317  */
1318 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1319 {
1320         ir_mode *mode = get_irn_mode(node);
1321
1322         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1323                 return node;
1324         if (!mode_is_float(mode))
1325                 return node;
1326
1327         /* check if there is already a Conv */
1328         if (is_Conv(node)) {
1329                 /* convert it into a strict Conv */
1330                 set_Conv_strict(node, 1);
1331                 return node;
1332         }
1333
1334         /* otherwise create a new one */
1335         return new_d_strictConv(dbgi, node, mode);
1336 }
1337
1338 static ir_node *get_global_var_address(dbg_info *const dbgi,
1339                                        const declaration_t *const decl)
1340 {
1341         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1342
1343         ir_entity *const entity = decl->v.entity;
1344         switch ((storage_class_tag_t)decl->storage_class) {
1345                 case STORAGE_CLASS_THREAD:
1346                 case STORAGE_CLASS_THREAD_EXTERN:
1347                 case STORAGE_CLASS_THREAD_STATIC: {
1348                         ir_node *const no_mem = new_NoMem();
1349                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1350                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1351                 }
1352
1353                 default:
1354                         return create_symconst(dbgi, mode_P_data, entity);
1355         }
1356 }
1357
1358 /**
1359  * Returns the correct base address depending on whether it is a parameter or a
1360  * normal local variable.
1361  */
1362 static ir_node *get_local_frame(ir_entity *const ent)
1363 {
1364         ir_graph      *const irg   = current_ir_graph;
1365         const ir_type *const owner = get_entity_owner(ent);
1366         if (owner == get_irg_frame_type(irg)) {
1367                 return get_irg_frame(irg);
1368         } else {
1369                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1370                 return get_irg_value_param_base(irg);
1371         }
1372 }
1373
1374 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1375 {
1376         ir_mode *value_mode = get_irn_mode(value);
1377
1378         if (value_mode == dest_mode || is_Bad(value))
1379                 return value;
1380
1381         if (dest_mode == mode_b) {
1382                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1383                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1384                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1385                 return proj;
1386         }
1387
1388         return new_d_Conv(dbgi, value, dest_mode);
1389 }
1390
1391 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1392 {
1393         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1394         declaration_t *declaration = ref->declaration;
1395         type_t        *type        = skip_typeref(declaration->type);
1396
1397         /* make sure the type is constructed */
1398         (void) get_ir_type(type);
1399
1400         switch((declaration_kind_t) declaration->declaration_kind) {
1401         case DECLARATION_KIND_TYPE:
1402         case DECLARATION_KIND_UNKNOWN:
1403                 break;
1404
1405         case DECLARATION_KIND_ENUM_ENTRY: {
1406                 ir_mode *const mode = get_ir_mode(type);
1407                 return new_Const(mode, declaration->v.enum_val);
1408         }
1409
1410         case DECLARATION_KIND_LOCAL_VARIABLE: {
1411                 ir_mode *const mode = get_ir_mode(type);
1412                 return get_value(declaration->v.value_number, mode);
1413         }
1414         case DECLARATION_KIND_FUNCTION: {
1415                 ir_mode *const mode = get_ir_mode(type);
1416                 return create_symconst(dbgi, mode, declaration->v.entity);
1417         }
1418         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1419                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1420                 return deref_address(dbgi, declaration->type, addr);
1421         }
1422
1423         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1424                 ir_entity *entity = declaration->v.entity;
1425                 ir_node   *frame  = get_local_frame(entity);
1426                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1427                 return deref_address(dbgi, declaration->type, sel);
1428         }
1429
1430         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1431                 return declaration->v.vla_base;
1432
1433         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1434         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1435         case DECLARATION_KIND_COMPOUND_MEMBER:
1436         case DECLARATION_KIND_LABEL_BLOCK:
1437                 panic("not implemented reference type");
1438         }
1439
1440         panic("reference to declaration with unknown type found");
1441 }
1442
1443 static ir_node *reference_addr(const reference_expression_t *ref)
1444 {
1445         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1446         declaration_t *declaration = ref->declaration;
1447
1448         switch((declaration_kind_t) declaration->declaration_kind) {
1449         case DECLARATION_KIND_TYPE:
1450         case DECLARATION_KIND_UNKNOWN:
1451                 break;
1452         case DECLARATION_KIND_LOCAL_VARIABLE:
1453                 /* you can store to a local variable (so we don't panic but return NULL
1454                  * as an indicator for no real address) */
1455                 return NULL;
1456         case DECLARATION_KIND_FUNCTION: {
1457                 type_t *const  type = skip_typeref(ref->base.type);
1458                 ir_mode *const mode = get_ir_mode(type);
1459                 return create_symconst(dbgi, mode, declaration->v.entity);
1460         }
1461         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1462                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1463                 return addr;
1464         }
1465         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1466                 ir_entity *entity = declaration->v.entity;
1467                 ir_node   *frame  = get_local_frame(entity);
1468                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1469
1470                 return sel;
1471         }
1472
1473         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1474                 return declaration->v.vla_base;
1475
1476         case DECLARATION_KIND_ENUM_ENTRY:
1477                 panic("trying to reference enum entry");
1478
1479         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1480         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1481         case DECLARATION_KIND_COMPOUND_MEMBER:
1482         case DECLARATION_KIND_LABEL_BLOCK:
1483                 panic("not implemented reference type");
1484         }
1485
1486         panic("reference to declaration with unknown type found");
1487 }
1488
1489 /**
1490  * Transform calls to builtin functions.
1491  */
1492 static ir_node *process_builtin_call(const call_expression_t *call)
1493 {
1494         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1495
1496         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1497         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1498
1499         type_t *type = skip_typeref(builtin->base.type);
1500         assert(is_type_pointer(type));
1501
1502         type_t   *function_type = skip_typeref(type->pointer.points_to);
1503         symbol_t *symbol        = builtin->symbol;
1504
1505         switch(symbol->ID) {
1506         case T___builtin_alloca: {
1507                 if (call->arguments == NULL || call->arguments->next != NULL) {
1508                         panic("invalid number of parameters on __builtin_alloca");
1509                 }
1510                 expression_t *argument = call->arguments->expression;
1511                 ir_node      *size     = expression_to_firm(argument);
1512
1513                 ir_node *store  = get_store();
1514                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1515                                               stack_alloc);
1516                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1517                 set_store(proj_m);
1518                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1519
1520                 return res;
1521         }
1522         case T___builtin_huge_val: {
1523                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1524                 tarval  *tv   = get_mode_infinite(mode);
1525                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1526                 return   res;
1527         }
1528         case T___builtin_nan:
1529         case T___builtin_nanf:
1530         case T___builtin_nand: {
1531                 /* Ignore string for now... */
1532                 assert(is_type_function(function_type));
1533                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1534                 tarval  *tv   = get_mode_NAN(mode);
1535                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1536                 return res;
1537         }
1538         case T___builtin_va_end:
1539                 return NULL;
1540         default:
1541                 panic("Unsupported builtin found\n");
1542         }
1543 }
1544
1545 /**
1546  * Transform a call expression.
1547  * Handles some special cases, like alloca() calls, which must be resolved
1548  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1549  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1550  * handled right...
1551  */
1552 static ir_node *call_expression_to_firm(const call_expression_t *call)
1553 {
1554         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1555         assert(get_cur_block() != NULL);
1556
1557         expression_t *function = call->function;
1558         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1559                 return process_builtin_call(call);
1560         }
1561         if (function->kind == EXPR_REFERENCE) {
1562                 const reference_expression_t *ref = &function->reference;
1563                 declaration_t *declaration = ref->declaration;
1564
1565                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1566                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1567                                 /* handle alloca() call */
1568                                 expression_t *argument = call->arguments->expression;
1569                                 ir_node      *size     = expression_to_firm(argument);
1570
1571                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1572
1573                                 ir_node  *store  = get_store();
1574                                 dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1575                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1576                                                                stack_alloc);
1577                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1578                                 set_store(proj_m);
1579                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1580
1581                                 return res;
1582                         }
1583                 }
1584         }
1585         ir_node *callee = expression_to_firm(function);
1586
1587         type_t *type = skip_typeref(function->base.type);
1588         assert(is_type_pointer(type));
1589         pointer_type_t *pointer_type = &type->pointer;
1590         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1591         assert(is_type_function(points_to));
1592         function_type_t *function_type = &points_to->function;
1593
1594         int      n_parameters = 0;
1595         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1596         ir_type *new_method_type = NULL;
1597         if (function_type->variadic || function_type->unspecified_parameters) {
1598                 const call_argument_t *argument = call->arguments;
1599                 for( ; argument != NULL; argument = argument->next) {
1600                         ++n_parameters;
1601                 }
1602
1603                 /* we need to construct a new method type matching the call
1604                  * arguments... */
1605                 int n_res       = get_method_n_ress(ir_method_type);
1606                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1607                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1608                                                     n_parameters, n_res, dbgi);
1609                 set_method_calling_convention(new_method_type,
1610                                get_method_calling_convention(ir_method_type));
1611                 set_method_additional_properties(new_method_type,
1612                                get_method_additional_properties(ir_method_type));
1613                 set_method_variadicity(new_method_type,
1614                                        get_method_variadicity(ir_method_type));
1615
1616                 for(int i = 0; i < n_res; ++i) {
1617                         set_method_res_type(new_method_type, i,
1618                                             get_method_res_type(ir_method_type, i));
1619                 }
1620                 argument = call->arguments;
1621                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1622                         expression_t *expression = argument->expression;
1623                         ir_type      *irtype     = get_ir_type(expression->base.type);
1624                         set_method_param_type(new_method_type, i, irtype);
1625                 }
1626                 ir_method_type = new_method_type;
1627         } else {
1628                 n_parameters = get_method_n_params(ir_method_type);
1629         }
1630
1631         ir_node *in[n_parameters];
1632
1633         const call_argument_t *argument = call->arguments;
1634         for(int n = 0; n < n_parameters; ++n) {
1635                 expression_t *expression = argument->expression;
1636                 ir_node      *arg_node   = expression_to_firm(expression);
1637
1638                 arg_node = do_strict_conv(dbgi, arg_node);
1639
1640                 in[n] = arg_node;
1641
1642                 argument = argument->next;
1643         }
1644
1645         ir_node  *store = get_store();
1646         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1647                                      ir_method_type);
1648         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1649         set_store(mem);
1650
1651         type_t  *return_type = skip_typeref(function_type->return_type);
1652         ir_node *result      = NULL;
1653
1654         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1655                 ir_mode *mode;
1656                 if (is_type_scalar(return_type)) {
1657                         mode = get_ir_mode(return_type);
1658                 } else {
1659                         mode = mode_P_data;
1660                 }
1661                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1662                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1663         }
1664
1665         if (function->kind == EXPR_REFERENCE &&
1666             function->reference.declaration->modifiers & DM_NORETURN) {
1667                 /* A dead end:  Keep the Call and the Block.  Also place all further
1668                  * nodes into a new and unreachable block. */
1669                 keep_alive(node);
1670                 keep_alive(get_cur_block());
1671                 new_Block(0, NULL);
1672         }
1673
1674         return result;
1675 }
1676
1677 static void statement_to_firm(statement_t *statement);
1678 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1679
1680 static ir_node *expression_to_addr(const expression_t *expression);
1681 static ir_node *create_condition_evaluation(const expression_t *expression,
1682                                             ir_node *true_block,
1683                                             ir_node *false_block);
1684
1685 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1686                          ir_node *value)
1687 {
1688         value = do_strict_conv(dbgi, value);
1689
1690         ir_node *memory = get_store();
1691
1692         if (is_type_scalar(type)) {
1693                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1694                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1695                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1696                         set_Store_volatility(store, volatility_is_volatile);
1697                 set_store(store_mem);
1698         } else {
1699                 ir_type *irtype    = get_ir_type(type);
1700                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1701                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1702                 set_store(copyb_mem);
1703         }
1704 }
1705
1706 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1707 {
1708         tarval *all_one   = get_mode_all_one(mode);
1709         int     mode_size = get_mode_size_bits(mode);
1710
1711         assert(offset >= 0);
1712         assert(size   >= 0);
1713         assert(offset + size <= mode_size);
1714         if (size == mode_size) {
1715                 return all_one;
1716         }
1717
1718         long    shiftr    = get_mode_size_bits(mode) - size;
1719         long    shiftl    = offset;
1720         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1721         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1722         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1723         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1724
1725         return mask1;
1726 }
1727
1728 static void bitfield_store_to_firm(const select_expression_t *expression,
1729                                    ir_node *addr, ir_node *value)
1730 {
1731         type_t       *type   = expression->base.type;
1732         ir_mode      *mode   = get_ir_mode(type);
1733
1734         assert(get_irn_mode(value) == mode || is_Bad(value));
1735
1736         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1737
1738         /* kill upper bits of value and shift to right position */
1739         ir_entity *entity       = expression->compound_entry->v.entity;
1740         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1741         ir_type   *entity_type  = get_entity_type(entity);
1742         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1743
1744         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1745         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1746         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1747         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1748         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1749         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1750
1751         /* load current value */
1752         ir_node  *mem             = get_store();
1753         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1754         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1755         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1756         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1757         tarval   *inv_mask        = tarval_not(shift_mask);
1758         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1759         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1760
1761         /* construct new value and store */
1762         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1763         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1764         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1765         set_store(store_mem);
1766
1767         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1768                 set_Load_volatility(load, volatility_is_volatile);
1769                 set_Store_volatility(store, volatility_is_volatile);
1770         }
1771 }
1772
1773 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1774                 ir_node *addr)
1775 {
1776         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1777         type_t   *type     = expression->base.type;
1778         ir_mode  *mode     = get_ir_mode(type);
1779         ir_node  *mem      = get_store();
1780         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1781         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1782         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1783
1784         load_res           = create_conv(dbgi, load_res, mode_int);
1785
1786         set_store(load_mem);
1787
1788         /* kill upper bits */
1789         ir_entity *entity       = expression->compound_entry->v.entity;
1790         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1791         ir_type   *entity_type  = get_entity_type(entity);
1792         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1793         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1794         assert(shift_bitsl >= 0);
1795         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1796         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1797         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1798
1799         long       shift_bitsr  = bitoffset + shift_bitsl;
1800         assert(shift_bitsr <= (long) machine_size);
1801         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1802         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1803         ir_node   *shiftr;
1804         if (mode_is_signed(mode)) {
1805                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1806         } else {
1807                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1808         }
1809
1810         return create_conv(dbgi, shiftr, mode);
1811 }
1812
1813 static void set_value_for_expression_addr(const expression_t *expression,
1814                                           ir_node *value, ir_node *addr)
1815 {
1816         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1817         value          = do_strict_conv(dbgi, value);
1818
1819         if (expression->kind == EXPR_REFERENCE) {
1820                 const reference_expression_t *ref = &expression->reference;
1821
1822                 declaration_t *declaration = ref->declaration;
1823                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1824                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1825                         set_value(declaration->v.value_number, value);
1826                         return;
1827                 }
1828         }
1829
1830         if (addr == NULL)
1831                 addr = expression_to_addr(expression);
1832
1833         type_t *type = skip_typeref(expression->base.type);
1834
1835         if (expression->kind == EXPR_SELECT) {
1836                 const select_expression_t *select = &expression->select;
1837
1838                 declaration_t *declaration = select->compound_entry;
1839                 if (declaration->type->kind == TYPE_BITFIELD) {
1840                         bitfield_store_to_firm(select, addr, value);
1841                         return;
1842                 }
1843         }
1844
1845         assign_value(dbgi, addr, type, value);
1846 }
1847
1848 static void set_value_for_expression(const expression_t *expression,
1849                                      ir_node *value)
1850 {
1851         set_value_for_expression_addr(expression, value, NULL);
1852 }
1853
1854 static ir_node *get_value_from_lvalue(const expression_t *expression,
1855                                       ir_node *addr)
1856 {
1857         if (expression->kind == EXPR_REFERENCE) {
1858                 const reference_expression_t *ref = &expression->reference;
1859
1860                 declaration_t *declaration = ref->declaration;
1861                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1862                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1863                         assert(addr == NULL);
1864                         ir_mode *mode = get_ir_mode(expression->base.type);
1865                         return get_value(declaration->v.value_number, mode);
1866                 }
1867         }
1868
1869         assert(addr != NULL);
1870         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1871
1872         ir_node *value;
1873         if (expression->kind == EXPR_SELECT &&
1874             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1875                 value = bitfield_extract_to_firm(&expression->select, addr);
1876         } else {
1877                 value = deref_address(dbgi, expression->base.type, addr);
1878         }
1879
1880         return value;
1881 }
1882
1883
1884 static ir_node *create_incdec(const unary_expression_t *expression)
1885 {
1886         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1887         const expression_t *value_expr = expression->value;
1888         ir_node            *addr       = expression_to_addr(value_expr);
1889         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1890
1891         type_t  *type = skip_typeref(expression->base.type);
1892         ir_mode *mode = get_ir_mode(expression->base.type);
1893
1894         ir_node *offset;
1895         if (is_type_pointer(type)) {
1896                 pointer_type_t *pointer_type = &type->pointer;
1897                 offset                       = get_type_size(pointer_type->points_to);
1898         } else {
1899                 assert(is_type_arithmetic(type));
1900                 offset = new_Const(mode, get_mode_one(mode));
1901         }
1902
1903         ir_node *result;
1904         ir_node *store_value;
1905         switch(expression->base.kind) {
1906         case EXPR_UNARY_POSTFIX_INCREMENT:
1907                 result      = value;
1908                 store_value = new_d_Add(dbgi, value, offset, mode);
1909                 break;
1910         case EXPR_UNARY_POSTFIX_DECREMENT:
1911                 result      = value;
1912                 store_value = new_d_Sub(dbgi, value, offset, mode);
1913                 break;
1914         case EXPR_UNARY_PREFIX_INCREMENT:
1915                 result      = new_d_Add(dbgi, value, offset, mode);
1916                 store_value = result;
1917                 break;
1918         case EXPR_UNARY_PREFIX_DECREMENT:
1919                 result      = new_d_Sub(dbgi, value, offset, mode);
1920                 store_value = result;
1921                 break;
1922         default:
1923                 panic("no incdec expr in create_incdec");
1924         }
1925
1926         set_value_for_expression_addr(value_expr, store_value, addr);
1927
1928         return result;
1929 }
1930
1931 static bool is_local_variable(expression_t *expression)
1932 {
1933         if (expression->kind != EXPR_REFERENCE)
1934                 return false;
1935         reference_expression_t *ref_expr    = &expression->reference;
1936         declaration_t          *declaration = ref_expr->declaration;
1937         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1938 }
1939
1940 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1941 {
1942         switch(kind) {
1943         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1944         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1945         case EXPR_BINARY_NOTEQUAL:
1946                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1947         case EXPR_BINARY_ISLESS:
1948         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1949         case EXPR_BINARY_ISLESSEQUAL:
1950         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1951         case EXPR_BINARY_ISGREATER:
1952         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1953         case EXPR_BINARY_ISGREATEREQUAL:
1954         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1955         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1956
1957         default:
1958                 break;
1959         }
1960         panic("trying to get pn_Cmp from non-comparison binexpr type");
1961 }
1962
1963 /**
1964  * Handle the assume optimizer hint: check if a Confirm
1965  * node can be created.
1966  *
1967  * @param dbi    debug info
1968  * @param expr   the IL assume expression
1969  *
1970  * we support here only some simple cases:
1971  *  - var rel const
1972  *  - const rel val
1973  *  - var rel var
1974  */
1975 static ir_node *handle_assume_compare(dbg_info *dbi,
1976                                       const binary_expression_t *expression)
1977 {
1978         expression_t  *op1 = expression->left;
1979         expression_t  *op2 = expression->right;
1980         declaration_t *var2, *var = NULL;
1981         ir_node       *res = NULL;
1982         pn_Cmp         cmp_val;
1983
1984         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1985
1986         if (is_local_variable(op1) && is_local_variable(op2)) {
1987         var  = op1->reference.declaration;
1988             var2 = op2->reference.declaration;
1989
1990                 type_t  *const type = skip_typeref(var->type);
1991                 ir_mode *const mode = get_ir_mode(type);
1992
1993                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1994                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1995
1996                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1997                 set_value(var2->v.value_number, res);
1998
1999                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2000                 set_value(var->v.value_number, res);
2001
2002                 return res;
2003         }
2004
2005         expression_t *con;
2006         if (is_local_variable(op1) && is_constant_expression(op2)) {
2007                 var = op1->reference.declaration;
2008                 con = op2;
2009         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2010                 cmp_val = get_inversed_pnc(cmp_val);
2011                 var = op2->reference.declaration;
2012                 con = op1;
2013         }
2014
2015         if (var != NULL) {
2016                 type_t  *const type = skip_typeref(var->type);
2017                 ir_mode *const mode = get_ir_mode(type);
2018
2019                 res = get_value(var->v.value_number, mode);
2020                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2021                 set_value(var->v.value_number, res);
2022         }
2023         return res;
2024 }
2025
2026 /**
2027  * Handle the assume optimizer hint.
2028  *
2029  * @param dbi    debug info
2030  * @param expr   the IL assume expression
2031  */
2032 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2033         switch(expression->kind) {
2034         case EXPR_BINARY_EQUAL:
2035         case EXPR_BINARY_NOTEQUAL:
2036         case EXPR_BINARY_LESS:
2037         case EXPR_BINARY_LESSEQUAL:
2038         case EXPR_BINARY_GREATER:
2039         case EXPR_BINARY_GREATEREQUAL:
2040                 return handle_assume_compare(dbi, &expression->binary);
2041         default:
2042                 return NULL;
2043         }
2044 }
2045
2046 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2047 {
2048         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2049         type_t   *type = skip_typeref(expression->base.type);
2050
2051         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2052                 return expression_to_addr(expression->value);
2053
2054         const expression_t *value = expression->value;
2055
2056         switch(expression->base.kind) {
2057         case EXPR_UNARY_NEGATE: {
2058                 ir_node *value_node = expression_to_firm(value);
2059                 ir_mode *mode = get_ir_mode(type);
2060                 return new_d_Minus(dbgi, value_node, mode);
2061         }
2062         case EXPR_UNARY_PLUS:
2063                 return expression_to_firm(value);
2064         case EXPR_UNARY_BITWISE_NEGATE: {
2065                 ir_node *value_node = expression_to_firm(value);
2066                 ir_mode *mode = get_ir_mode(type);
2067                 return new_d_Not(dbgi, value_node, mode);
2068         }
2069         case EXPR_UNARY_NOT: {
2070                 ir_node *value_node = _expression_to_firm(value);
2071                 value_node          = create_conv(dbgi, value_node, mode_b);
2072                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2073                 return res;
2074         }
2075         case EXPR_UNARY_DEREFERENCE: {
2076                 ir_node *value_node = expression_to_firm(value);
2077                 type_t  *value_type = skip_typeref(value->base.type);
2078                 assert(is_type_pointer(value_type));
2079                 type_t  *points_to  = value_type->pointer.points_to;
2080                 return deref_address(dbgi, points_to, value_node);
2081         }
2082         case EXPR_UNARY_POSTFIX_INCREMENT:
2083         case EXPR_UNARY_POSTFIX_DECREMENT:
2084         case EXPR_UNARY_PREFIX_INCREMENT:
2085         case EXPR_UNARY_PREFIX_DECREMENT:
2086                 return create_incdec(expression);
2087         case EXPR_UNARY_CAST: {
2088                 ir_node *value_node = expression_to_firm(value);
2089                 if (is_type_scalar(type)) {
2090                         ir_mode *mode = get_ir_mode(type);
2091                         ir_node *node = create_conv(dbgi, value_node, mode);
2092                         node = do_strict_conv(dbgi, node);
2093                         return node;
2094                 } else {
2095                         /* make sure firm type is constructed */
2096                         (void) get_ir_type(type);
2097                         return value_node;
2098                 }
2099         }
2100         case EXPR_UNARY_CAST_IMPLICIT: {
2101                 ir_node *value_node = expression_to_firm(value);
2102                 if (is_type_scalar(type)) {
2103                         ir_mode *mode = get_ir_mode(type);
2104                         return create_conv(dbgi, value_node, mode);
2105                 } else {
2106                         return value_node;
2107                 }
2108         }
2109         case EXPR_UNARY_ASSUME:
2110                 if (firm_opt.confirm)
2111                         return handle_assume(dbgi, value);
2112                 else
2113                         return NULL;
2114
2115         default:
2116                 break;
2117         }
2118         panic("invalid UNEXPR type found");
2119 }
2120
2121 /**
2122  * produces a 0/1 depending of the value of a mode_b node
2123  */
2124 static ir_node *produce_condition_result(const expression_t *expression,
2125                                          dbg_info *dbgi)
2126 {
2127         ir_mode *mode      = get_ir_mode(expression->base.type);
2128         ir_node *cur_block = get_cur_block();
2129
2130         ir_node *one_block = new_immBlock();
2131         ir_node *one       = new_Const(mode, get_mode_one(mode));
2132         ir_node *jmp_one   = new_d_Jmp(dbgi);
2133
2134         ir_node *zero_block = new_immBlock();
2135         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2136         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2137
2138         set_cur_block(cur_block);
2139         create_condition_evaluation(expression, one_block, zero_block);
2140         mature_immBlock(one_block);
2141         mature_immBlock(zero_block);
2142
2143         ir_node *common_block = new_immBlock();
2144         add_immBlock_pred(common_block, jmp_one);
2145         add_immBlock_pred(common_block, jmp_zero);
2146         mature_immBlock(common_block);
2147
2148         ir_node *in[2] = { one, zero };
2149         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2150
2151         return val;
2152 }
2153
2154 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2155                 ir_node *value, type_t *type)
2156 {
2157         pointer_type_t *const pointer_type = &type->pointer;
2158         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2159         unsigned              elem_size    = get_type_size_const(points_to);
2160
2161         /* gcc extension: allow arithmetic with void * and function * */
2162         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2163             is_type_function(points_to))  {
2164                 elem_size = 1;
2165         }
2166
2167         assert(elem_size >= 1);
2168         if (elem_size == 1)
2169                 return value;
2170
2171         value = create_conv(dbgi, value, mode_int);
2172         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2173         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2174         return mul;
2175 }
2176
2177 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2178                           ir_node *left, ir_node *right)
2179 {
2180         ir_mode  *mode;
2181         type_t   *type_left  = skip_typeref(expression->left->base.type);
2182         type_t   *type_right = skip_typeref(expression->right->base.type);
2183
2184         expression_kind_t kind = expression->base.kind;
2185
2186         switch (kind) {
2187         case EXPR_BINARY_SHIFTLEFT:
2188         case EXPR_BINARY_SHIFTRIGHT:
2189         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2190         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2191                 mode  = get_irn_mode(left);
2192                 right = create_conv(dbgi, right, mode_uint);
2193                 break;
2194
2195         case EXPR_BINARY_SUB:
2196                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2197                         const pointer_type_t *const ptr_type = &type_left->pointer;
2198
2199                         mode = get_ir_mode(expression->base.type);
2200                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2201                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2202                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2203                         ir_node *const no_mem    = new_NoMem();
2204                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2205                                                                                                    mode, op_pin_state_floats);
2206                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2207                 }
2208                 /* fallthrough */
2209         case EXPR_BINARY_SUB_ASSIGN:
2210                 if (is_type_pointer(type_left)) {
2211                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2212                         mode  = get_ir_mode(type_left);
2213                         break;
2214                 }
2215                 goto normal_node;
2216
2217         case EXPR_BINARY_ADD:
2218         case EXPR_BINARY_ADD_ASSIGN:
2219                 if (is_type_pointer(type_left)) {
2220                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2221                         mode  = get_ir_mode(type_left);
2222                         break;
2223                 } else if (is_type_pointer(type_right)) {
2224                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2225                         mode  = get_ir_mode(type_right);
2226                         break;
2227                 }
2228                 goto normal_node;
2229
2230         default:
2231 normal_node:
2232                 mode = get_irn_mode(right);
2233                 left = create_conv(dbgi, left, mode);
2234                 break;
2235         }
2236
2237         switch (kind) {
2238         case EXPR_BINARY_ADD_ASSIGN:
2239         case EXPR_BINARY_ADD:
2240                 return new_d_Add(dbgi, left, right, mode);
2241         case EXPR_BINARY_SUB_ASSIGN:
2242         case EXPR_BINARY_SUB:
2243                 return new_d_Sub(dbgi, left, right, mode);
2244         case EXPR_BINARY_MUL_ASSIGN:
2245         case EXPR_BINARY_MUL:
2246                 return new_d_Mul(dbgi, left, right, mode);
2247         case EXPR_BINARY_BITWISE_AND:
2248         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2249                 return new_d_And(dbgi, left, right, mode);
2250         case EXPR_BINARY_BITWISE_OR:
2251         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2252                 return new_d_Or(dbgi, left, right, mode);
2253         case EXPR_BINARY_BITWISE_XOR:
2254         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2255                 return new_d_Eor(dbgi, left, right, mode);
2256         case EXPR_BINARY_SHIFTLEFT:
2257         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2258                 return new_d_Shl(dbgi, left, right, mode);
2259         case EXPR_BINARY_SHIFTRIGHT:
2260         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2261                 if (mode_is_signed(mode)) {
2262                         return new_d_Shrs(dbgi, left, right, mode);
2263                 } else {
2264                         return new_d_Shr(dbgi, left, right, mode);
2265                 }
2266         case EXPR_BINARY_DIV:
2267         case EXPR_BINARY_DIV_ASSIGN: {
2268                 ir_node *pin = new_Pin(new_NoMem());
2269                 ir_node *op;
2270                 ir_node *res;
2271                 if (mode_is_float(mode)) {
2272                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2273                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2274                 } else {
2275                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2276                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2277                 }
2278                 return res;
2279         }
2280         case EXPR_BINARY_MOD:
2281         case EXPR_BINARY_MOD_ASSIGN: {
2282                 ir_node *pin = new_Pin(new_NoMem());
2283                 assert(!mode_is_float(mode));
2284                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2285                                          op_pin_state_floats);
2286                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2287                 return res;
2288         }
2289         default:
2290                 panic("unexpected expression kind");
2291         }
2292 }
2293
2294 static ir_node *create_lazy_op(const binary_expression_t *expression)
2295 {
2296         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2297         type_t   *type = expression->base.type;
2298         ir_mode  *mode = get_ir_mode(type);
2299
2300         if (is_constant_expression(expression->left)) {
2301                 long val = fold_constant(expression->left);
2302                 expression_kind_t ekind = expression->base.kind;
2303                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2304                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2305                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2306                         return expression_to_firm(expression->right);
2307                 } else {
2308                         return new_Const(mode, get_mode_one(mode));
2309                 }
2310         }
2311
2312         return produce_condition_result((const expression_t*) expression, dbgi);
2313 }
2314
2315 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2316                                             ir_node *right, ir_mode *mode);
2317
2318 static ir_node *create_assign_binop(const binary_expression_t *expression)
2319 {
2320         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2321         const expression_t *left_expr = expression->left;
2322         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2323         ir_node            *right     = expression_to_firm(expression->right);
2324         ir_node            *left_addr = expression_to_addr(left_expr);
2325         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2326         ir_node            *result    = create_op(dbgi, expression, left, right);
2327
2328         result = create_conv(dbgi, result, left_mode);
2329         result = do_strict_conv(dbgi, result);
2330
2331         set_value_for_expression_addr(left_expr, result, left_addr);
2332
2333         return result;
2334 }
2335
2336 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2337 {
2338         expression_kind_t kind = expression->base.kind;
2339
2340         switch(kind) {
2341         case EXPR_BINARY_EQUAL:
2342         case EXPR_BINARY_NOTEQUAL:
2343         case EXPR_BINARY_LESS:
2344         case EXPR_BINARY_LESSEQUAL:
2345         case EXPR_BINARY_GREATER:
2346         case EXPR_BINARY_GREATEREQUAL:
2347         case EXPR_BINARY_ISGREATER:
2348         case EXPR_BINARY_ISGREATEREQUAL:
2349         case EXPR_BINARY_ISLESS:
2350         case EXPR_BINARY_ISLESSEQUAL:
2351         case EXPR_BINARY_ISLESSGREATER:
2352         case EXPR_BINARY_ISUNORDERED: {
2353                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2354                 ir_node *left  = expression_to_firm(expression->left);
2355                 ir_node *right = expression_to_firm(expression->right);
2356                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2357                 long     pnc   = get_pnc(kind, expression->left->base.type);
2358                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2359                 return proj;
2360         }
2361         case EXPR_BINARY_ASSIGN: {
2362                 ir_node *addr  = expression_to_addr(expression->left);
2363                 ir_node *right = expression_to_firm(expression->right);
2364                 set_value_for_expression_addr(expression->left, right, addr);
2365
2366                 return right;
2367         }
2368         case EXPR_BINARY_ADD:
2369         case EXPR_BINARY_SUB:
2370         case EXPR_BINARY_MUL:
2371         case EXPR_BINARY_DIV:
2372         case EXPR_BINARY_MOD:
2373         case EXPR_BINARY_BITWISE_AND:
2374         case EXPR_BINARY_BITWISE_OR:
2375         case EXPR_BINARY_BITWISE_XOR:
2376         case EXPR_BINARY_SHIFTLEFT:
2377         case EXPR_BINARY_SHIFTRIGHT:
2378         {
2379                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2380                 ir_node  *left  = expression_to_firm(expression->left);
2381                 ir_node  *right = expression_to_firm(expression->right);
2382                 return create_op(dbgi, expression, left, right);
2383         }
2384         case EXPR_BINARY_LOGICAL_AND:
2385         case EXPR_BINARY_LOGICAL_OR:
2386                 return create_lazy_op(expression);
2387         case EXPR_BINARY_COMMA:
2388                 /* create side effects of left side */
2389                 (void) expression_to_firm(expression->left);
2390                 return _expression_to_firm(expression->right);
2391
2392         case EXPR_BINARY_ADD_ASSIGN:
2393         case EXPR_BINARY_SUB_ASSIGN:
2394         case EXPR_BINARY_MUL_ASSIGN:
2395         case EXPR_BINARY_MOD_ASSIGN:
2396         case EXPR_BINARY_DIV_ASSIGN:
2397         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2398         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2399         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2400         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2401         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2402                 return create_assign_binop(expression);
2403         case EXPR_BINARY_BUILTIN_EXPECT:
2404                 return _expression_to_firm(expression->left);
2405         default:
2406                 panic("TODO binexpr type");
2407         }
2408 }
2409
2410 static ir_node *array_access_addr(const array_access_expression_t *expression)
2411 {
2412         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2413         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2414         ir_node  *offset    = expression_to_firm(expression->index);
2415
2416         type_t  *offset_type = skip_typeref(expression->index->base.type);
2417         ir_mode *mode;
2418         if (is_type_signed(offset_type)) {
2419                 mode = get_ir_mode(type_ssize_t);
2420         } else {
2421                 mode = get_ir_mode(type_size_t);
2422         }
2423         offset = create_conv(dbgi, offset, mode);
2424
2425         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2426         assert(is_type_pointer(ref_type));
2427         pointer_type_t *pointer_type = &ref_type->pointer;
2428
2429         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2430         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2431         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2432                                              mode);
2433         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2434
2435         return result;
2436 }
2437
2438 static ir_node *array_access_to_firm(
2439                 const array_access_expression_t *expression)
2440 {
2441         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2442         ir_node  *addr   = array_access_addr(expression);
2443         type_t   *type   = revert_automatic_type_conversion(
2444                         (const expression_t*) expression);
2445         type             = skip_typeref(type);
2446
2447         return deref_address(dbgi, type, addr);
2448 }
2449
2450 static long get_offsetof_offset(const offsetof_expression_t *expression)
2451 {
2452         type_t *orig_type = expression->type;
2453         long    offset    = 0;
2454
2455         designator_t *designator = expression->designator;
2456         for( ; designator != NULL; designator = designator->next) {
2457                 type_t *type = skip_typeref(orig_type);
2458                 /* be sure the type is constructed */
2459                 (void) get_ir_type(type);
2460
2461                 if (designator->symbol != NULL) {
2462                         assert(is_type_compound(type));
2463                         symbol_t *symbol = designator->symbol;
2464
2465                         declaration_t *declaration = type->compound.declaration;
2466                         declaration_t *iter        = declaration->scope.declarations;
2467                         for( ; iter != NULL; iter = iter->next) {
2468                                 if (iter->symbol == symbol) {
2469                                         break;
2470                                 }
2471                         }
2472                         assert(iter != NULL);
2473
2474                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2475                         offset += get_entity_offset(iter->v.entity);
2476
2477                         orig_type = iter->type;
2478                 } else {
2479                         expression_t *array_index = designator->array_index;
2480                         assert(designator->array_index != NULL);
2481                         assert(is_type_array(type));
2482                         assert(is_type_valid(array_index->base.type));
2483
2484                         long index         = fold_constant(array_index);
2485                         ir_type *arr_type  = get_ir_type(type);
2486                         ir_type *elem_type = get_array_element_type(arr_type);
2487                         long     elem_size = get_type_size_bytes(elem_type);
2488
2489                         offset += index * elem_size;
2490
2491                         orig_type = type->array.element_type;
2492                 }
2493         }
2494
2495         return offset;
2496 }
2497
2498 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2499 {
2500         ir_mode  *mode   = get_ir_mode(expression->base.type);
2501         long      offset = get_offsetof_offset(expression);
2502         tarval   *tv     = new_tarval_from_long(offset, mode);
2503         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2504
2505         return new_d_Const(dbgi, mode, tv);
2506 }
2507
2508 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2509                                      ir_entity *entity, type_t *type);
2510
2511 static ir_node *compound_literal_to_firm(
2512                 const compound_literal_expression_t *expression)
2513 {
2514         type_t *type = expression->type;
2515
2516         /* create an entity on the stack */
2517         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2518
2519         ident     *const id     = id_unique("CompLit.%u");
2520         ir_type   *const irtype = get_ir_type(type);
2521         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2522         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2523         set_entity_ld_ident(entity, id);
2524
2525         set_entity_variability(entity, variability_uninitialized);
2526
2527         /* create initialisation code */
2528         initializer_t *initializer = expression->initializer;
2529         create_local_initializer(initializer, dbgi, entity, type);
2530
2531         /* create a sel for the compound literal address */
2532         ir_node *frame = get_local_frame(entity);
2533         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2534         return sel;
2535 }
2536
2537 /**
2538  * Transform a sizeof expression into Firm code.
2539  */
2540 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2541 {
2542         type_t *type = expression->type;
2543         if (type == NULL) {
2544                 type = expression->tp_expression->base.type;
2545                 assert(type != NULL);
2546         }
2547
2548         type = skip_typeref(type);
2549         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2550         if (is_type_array(type) && type->array.is_vla
2551                         && expression->tp_expression != NULL) {
2552                 expression_to_firm(expression->tp_expression);
2553         }
2554
2555         return get_type_size(type);
2556 }
2557
2558 /**
2559  * Transform an alignof expression into Firm code.
2560  */
2561 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2562 {
2563         type_t *type = expression->type;
2564         if (type == NULL) {
2565                 /* beware: if expression is a variable reference, return the
2566                    alignment of the variable. */
2567                 const expression_t *tp_expression = expression->tp_expression;
2568                 const declaration_t *declaration = expr_is_variable(tp_expression);
2569                 if (declaration != NULL) {
2570                         /* TODO: get the alignment of this variable. */
2571                 }
2572                 type = tp_expression->base.type;
2573                 assert(type != NULL);
2574         }
2575
2576         ir_mode *const mode = get_ir_mode(expression->base.type);
2577         symconst_symbol sym;
2578         sym.type_p = get_ir_type(type);
2579         return new_SymConst(mode, sym, symconst_type_align);
2580 }
2581
2582 static void init_ir_types(void);
2583
2584 long fold_constant(const expression_t *expression)
2585 {
2586         bool constant_folding_old = constant_folding;
2587         constant_folding = true;
2588
2589         init_ir_types();
2590
2591         assert(is_constant_expression(expression));
2592
2593         ir_graph *old_current_ir_graph = current_ir_graph;
2594         if (current_ir_graph == NULL) {
2595                 current_ir_graph = get_const_code_irg();
2596         }
2597
2598         ir_node *cnst = expression_to_firm(expression);
2599         current_ir_graph = old_current_ir_graph;
2600
2601         if (!is_Const(cnst)) {
2602                 panic("couldn't fold constant\n");
2603         }
2604
2605         tarval *tv = get_Const_tarval(cnst);
2606         if (!tarval_is_long(tv)) {
2607                 panic("result of constant folding is not integer\n");
2608         }
2609
2610         constant_folding = constant_folding_old;
2611
2612         return get_tarval_long(tv);
2613 }
2614
2615 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2616 {
2617         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2618
2619         /* first try to fold a constant condition */
2620         if (is_constant_expression(expression->condition)) {
2621                 long val = fold_constant(expression->condition);
2622                 if (val) {
2623                         expression_t *true_expression = expression->true_expression;
2624                         if (true_expression == NULL)
2625                                 true_expression = expression->condition;
2626                         return expression_to_firm(true_expression);
2627                 } else {
2628                         return expression_to_firm(expression->false_expression);
2629                 }
2630         }
2631
2632         ir_node *cur_block   = get_cur_block();
2633
2634         /* create the true block */
2635         ir_node *true_block  = new_immBlock();
2636
2637         ir_node *true_val = expression->true_expression != NULL ?
2638                 expression_to_firm(expression->true_expression) : NULL;
2639         ir_node *true_jmp = new_Jmp();
2640
2641         /* create the false block */
2642         ir_node *false_block = new_immBlock();
2643
2644         ir_node *false_val = expression_to_firm(expression->false_expression);
2645         ir_node *false_jmp = new_Jmp();
2646
2647         /* create the condition evaluation */
2648         set_cur_block(cur_block);
2649         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2650         if (expression->true_expression == NULL) {
2651                 if (cond_expr != NULL) {
2652                         true_val = cond_expr;
2653                 } else {
2654                         /* Condition ended with a short circuit (&&, ||, !) operation.
2655                          * Generate a "1" as value for the true branch. */
2656                         ir_mode *const mode = mode_Is;
2657                         true_val = new_Const(mode, get_mode_one(mode));
2658                 }
2659         }
2660         mature_immBlock(true_block);
2661         mature_immBlock(false_block);
2662
2663         /* create the common block */
2664         ir_node *common_block = new_immBlock();
2665         add_immBlock_pred(common_block, true_jmp);
2666         add_immBlock_pred(common_block, false_jmp);
2667         mature_immBlock(common_block);
2668
2669         /* TODO improve static semantics, so either both or no values are NULL */
2670         if (true_val == NULL || false_val == NULL)
2671                 return NULL;
2672
2673         ir_node *in[2] = { true_val, false_val };
2674         ir_mode *mode  = get_irn_mode(true_val);
2675         assert(get_irn_mode(false_val) == mode);
2676         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2677
2678         return val;
2679 }
2680
2681 /**
2682  * Returns an IR-node representing the address of a field.
2683  */
2684 static ir_node *select_addr(const select_expression_t *expression)
2685 {
2686         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2687
2688         ir_node *compound_addr = expression_to_firm(expression->compound);
2689
2690         /* make sure the type is constructed */
2691         type_t *type = skip_typeref(expression->compound->base.type);
2692         if (is_type_pointer(type)) {
2693                 type = type->pointer.points_to;
2694         }
2695         (void) get_ir_type(type);
2696
2697         declaration_t *entry = expression->compound_entry;
2698         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2699         ir_entity     *entity = entry->v.entity;
2700
2701         assert(entity != NULL);
2702
2703         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2704
2705         return sel;
2706 }
2707
2708 static ir_node *select_to_firm(const select_expression_t *expression)
2709 {
2710         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2711         ir_node  *addr = select_addr(expression);
2712         type_t   *type = revert_automatic_type_conversion(
2713                         (const expression_t*) expression);
2714         type           = skip_typeref(type);
2715
2716         declaration_t *entry      = expression->compound_entry;
2717         type_t        *entry_type = skip_typeref(entry->type);
2718
2719         if (entry_type->kind == TYPE_BITFIELD) {
2720                 return bitfield_extract_to_firm(expression, addr);
2721         }
2722
2723         return deref_address(dbgi, type, addr);
2724 }
2725
2726 /* Values returned by __builtin_classify_type. */
2727 typedef enum gcc_type_class
2728 {
2729         no_type_class = -1,
2730         void_type_class,
2731         integer_type_class,
2732         char_type_class,
2733         enumeral_type_class,
2734         boolean_type_class,
2735         pointer_type_class,
2736         reference_type_class,
2737         offset_type_class,
2738         real_type_class,
2739         complex_type_class,
2740         function_type_class,
2741         method_type_class,
2742         record_type_class,
2743         union_type_class,
2744         array_type_class,
2745         string_type_class,
2746         set_type_class,
2747         file_type_class,
2748         lang_type_class
2749 } gcc_type_class;
2750
2751 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2752 {
2753         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2754
2755         gcc_type_class tc;
2756         switch (type->kind)
2757         {
2758                 case TYPE_ATOMIC: {
2759                         const atomic_type_t *const atomic_type = &type->atomic;
2760                         switch (atomic_type->akind) {
2761                                 /* should not be reached */
2762                                 case ATOMIC_TYPE_INVALID:
2763                                         tc = no_type_class;
2764                                         goto make_const;
2765
2766                                 /* gcc cannot do that */
2767                                 case ATOMIC_TYPE_VOID:
2768                                         tc = void_type_class;
2769                                         goto make_const;
2770
2771                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2772                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2773                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2774                                 case ATOMIC_TYPE_SHORT:
2775                                 case ATOMIC_TYPE_USHORT:
2776                                 case ATOMIC_TYPE_INT:
2777                                 case ATOMIC_TYPE_UINT:
2778                                 case ATOMIC_TYPE_LONG:
2779                                 case ATOMIC_TYPE_ULONG:
2780                                 case ATOMIC_TYPE_LONGLONG:
2781                                 case ATOMIC_TYPE_ULONGLONG:
2782                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2783                                         tc = integer_type_class;
2784                                         goto make_const;
2785
2786                                 case ATOMIC_TYPE_FLOAT:
2787                                 case ATOMIC_TYPE_DOUBLE:
2788                                 case ATOMIC_TYPE_LONG_DOUBLE:
2789                                         tc = real_type_class;
2790                                         goto make_const;
2791                         }
2792                         panic("Unexpected atomic type in classify_type_to_firm().");
2793                 }
2794
2795                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2796                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2797                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2798                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2799                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2800                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2801                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2802                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2803
2804                 /* gcc handles this as integer */
2805                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2806
2807                 case TYPE_BUILTIN:
2808                 /* typedef/typeof should be skipped already */
2809                 case TYPE_TYPEDEF:
2810                 case TYPE_TYPEOF:
2811                 case TYPE_INVALID:
2812                 case TYPE_ERROR:
2813                         break;
2814         }
2815         panic("unexpected TYPE classify_type_to_firm().");
2816
2817 make_const: ;
2818         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2819         ir_mode  *const mode = mode_int;
2820         tarval   *const tv   = new_tarval_from_long(tc, mode);
2821         return new_d_Const(dbgi, mode, tv);
2822 }
2823
2824 static ir_node *function_name_to_firm(
2825                 const funcname_expression_t *const expr)
2826 {
2827         switch(expr->kind) {
2828         case FUNCNAME_FUNCTION:
2829         case FUNCNAME_PRETTY_FUNCTION:
2830         case FUNCNAME_FUNCDNAME:
2831                 if (current_function_name == NULL) {
2832                         const source_position_t *const src_pos = &expr->base.source_position;
2833                         const char *const name = current_function_decl->symbol->string;
2834                         const string_t string = { name, strlen(name) + 1 };
2835                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2836                 }
2837                 return current_function_name;
2838         case FUNCNAME_FUNCSIG:
2839                 if (current_funcsig == NULL) {
2840                         const source_position_t *const src_pos = &expr->base.source_position;
2841                         ir_entity *ent = get_irg_entity(current_ir_graph);
2842                         const char *const name = get_entity_ld_name(ent);
2843                         const string_t string = { name, strlen(name) + 1 };
2844                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2845                 }
2846                 return current_funcsig;
2847         }
2848         panic("Unsupported function name");
2849 }
2850
2851 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2852 {
2853         statement_t *statement = expr->statement;
2854
2855         assert(statement->kind == STATEMENT_COMPOUND);
2856         return compound_statement_to_firm(&statement->compound);
2857 }
2858
2859 static ir_node *va_start_expression_to_firm(
2860         const va_start_expression_t *const expr)
2861 {
2862         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2863         int        const n           = get_method_n_params(method_type) - 1;
2864         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2865         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2866         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2867         ir_node   *const no_mem      = new_NoMem();
2868         ir_node   *const arg_sel     =
2869                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2870
2871         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2872         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2873         set_value_for_expression(expr->ap, add);
2874
2875         return NULL;
2876 }
2877
2878 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2879 {
2880         type_t       *const type    = expr->base.type;
2881         expression_t *const ap_expr = expr->ap;
2882         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2883         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2884         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2885         ir_node      *const res     = deref_address(dbgi, type, ap);
2886
2887         ir_node      *const cnst    = get_type_size(expr->base.type);
2888         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2889
2890         set_value_for_expression_addr(ap_expr, add, ap_addr);
2891
2892         return res;
2893 }
2894
2895 static ir_node *dereference_addr(const unary_expression_t *const expression)
2896 {
2897         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2898         return expression_to_firm(expression->value);
2899 }
2900
2901 /**
2902  * Returns a IR-node representing an lvalue of the given expression.
2903  */
2904 static ir_node *expression_to_addr(const expression_t *expression)
2905 {
2906         switch(expression->kind) {
2907         case EXPR_REFERENCE:
2908                 return reference_addr(&expression->reference);
2909         case EXPR_ARRAY_ACCESS:
2910                 return array_access_addr(&expression->array_access);
2911         case EXPR_SELECT:
2912                 return select_addr(&expression->select);
2913         case EXPR_CALL:
2914                 return call_expression_to_firm(&expression->call);
2915         case EXPR_UNARY_DEREFERENCE: {
2916                 return dereference_addr(&expression->unary);
2917         }
2918         default:
2919                 break;
2920         }
2921         panic("trying to get address of non-lvalue");
2922 }
2923
2924 static ir_node *builtin_constant_to_firm(
2925                 const builtin_constant_expression_t *expression)
2926 {
2927         ir_mode *mode = get_ir_mode(expression->base.type);
2928         long     v;
2929
2930         if (is_constant_expression(expression->value)) {
2931                 v = 1;
2932         } else {
2933                 v = 0;
2934         }
2935         return new_Const_long(mode, v);
2936 }
2937
2938 static ir_node *builtin_prefetch_to_firm(
2939                 const builtin_prefetch_expression_t *expression)
2940 {
2941         ir_node *adr = expression_to_firm(expression->adr);
2942         /* no Firm support for prefetch yet */
2943         (void) adr;
2944         return NULL;
2945 }
2946
2947 /**
2948  * creates firm nodes for an expression. The difference between this function
2949  * and expression_to_firm is, that this version might produce mode_b nodes
2950  * instead of mode_Is.
2951  */
2952 static ir_node *_expression_to_firm(const expression_t *expression)
2953 {
2954 #ifndef NDEBUG
2955         if (!constant_folding) {
2956                 assert(!expression->base.transformed);
2957                 ((expression_t*) expression)->base.transformed = true;
2958         }
2959 #endif
2960
2961         switch(expression->kind) {
2962         case EXPR_CHARACTER_CONSTANT:
2963                 return character_constant_to_firm(&expression->conste);
2964         case EXPR_WIDE_CHARACTER_CONSTANT:
2965                 return wide_character_constant_to_firm(&expression->conste);
2966         case EXPR_CONST:
2967                 return const_to_firm(&expression->conste);
2968         case EXPR_STRING_LITERAL:
2969                 return string_literal_to_firm(&expression->string);
2970         case EXPR_WIDE_STRING_LITERAL:
2971                 return wide_string_literal_to_firm(&expression->wide_string);
2972         case EXPR_REFERENCE:
2973                 return reference_expression_to_firm(&expression->reference);
2974         case EXPR_CALL:
2975                 return call_expression_to_firm(&expression->call);
2976         EXPR_UNARY_CASES
2977                 return unary_expression_to_firm(&expression->unary);
2978         EXPR_BINARY_CASES
2979                 return binary_expression_to_firm(&expression->binary);
2980         case EXPR_ARRAY_ACCESS:
2981                 return array_access_to_firm(&expression->array_access);
2982         case EXPR_SIZEOF:
2983                 return sizeof_to_firm(&expression->typeprop);
2984         case EXPR_ALIGNOF:
2985                 return alignof_to_firm(&expression->typeprop);
2986         case EXPR_CONDITIONAL:
2987                 return conditional_to_firm(&expression->conditional);
2988         case EXPR_SELECT:
2989                 return select_to_firm(&expression->select);
2990         case EXPR_CLASSIFY_TYPE:
2991                 return classify_type_to_firm(&expression->classify_type);
2992         case EXPR_FUNCNAME:
2993                 return function_name_to_firm(&expression->funcname);
2994         case EXPR_STATEMENT:
2995                 return statement_expression_to_firm(&expression->statement);
2996         case EXPR_VA_START:
2997                 return va_start_expression_to_firm(&expression->va_starte);
2998         case EXPR_VA_ARG:
2999                 return va_arg_expression_to_firm(&expression->va_arge);
3000         case EXPR_BUILTIN_SYMBOL:
3001                 panic("unimplemented expression found");
3002         case EXPR_BUILTIN_CONSTANT_P:
3003                 return builtin_constant_to_firm(&expression->builtin_constant);
3004         case EXPR_BUILTIN_PREFETCH:
3005                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3006         case EXPR_OFFSETOF:
3007                 return offsetof_to_firm(&expression->offsetofe);
3008         case EXPR_COMPOUND_LITERAL:
3009                 return compound_literal_to_firm(&expression->compound_literal);
3010
3011         case EXPR_UNKNOWN:
3012         case EXPR_INVALID:
3013                 break;
3014         }
3015         panic("invalid expression found");
3016 }
3017
3018 static bool produces_mode_b(const expression_t *expression)
3019 {
3020         switch (expression->kind) {
3021         case EXPR_BINARY_EQUAL:
3022         case EXPR_BINARY_NOTEQUAL:
3023         case EXPR_BINARY_LESS:
3024         case EXPR_BINARY_LESSEQUAL:
3025         case EXPR_BINARY_GREATER:
3026         case EXPR_BINARY_GREATEREQUAL:
3027         case EXPR_BINARY_ISGREATER:
3028         case EXPR_BINARY_ISGREATEREQUAL:
3029         case EXPR_BINARY_ISLESS:
3030         case EXPR_BINARY_ISLESSEQUAL:
3031         case EXPR_BINARY_ISLESSGREATER:
3032         case EXPR_BINARY_ISUNORDERED:
3033         case EXPR_UNARY_NOT:
3034                 return true;
3035
3036         case EXPR_BINARY_BUILTIN_EXPECT:
3037                 return produces_mode_b(expression->binary.left);
3038         case EXPR_BINARY_COMMA:
3039                 return produces_mode_b(expression->binary.right);
3040
3041         default:
3042                 return false;
3043         }
3044 }
3045
3046 static ir_node *expression_to_firm(const expression_t *expression)
3047 {
3048         if (!produces_mode_b(expression)) {
3049                 ir_node *res = _expression_to_firm(expression);
3050                 assert(res == NULL || get_irn_mode(res) != mode_b);
3051                 return res;
3052         }
3053
3054         if (is_constant_expression(expression)) {
3055                 ir_node *res  = _expression_to_firm(expression);
3056                 ir_mode *mode = get_ir_mode(expression->base.type);
3057                 assert(is_Const(res));
3058                 if (is_Const_null(res)) {
3059                         return new_Const_long(mode, 0);
3060                 } else {
3061                         return new_Const_long(mode, 1);
3062                 }
3063         }
3064
3065         /* we have to produce a 0/1 from the mode_b expression */
3066         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3067         return produce_condition_result(expression, dbgi);
3068 }
3069
3070 /**
3071  * create a short-circuit expression evaluation that tries to construct
3072  * efficient control flow structures for &&, || and ! expressions
3073  */
3074 static ir_node *create_condition_evaluation(const expression_t *expression,
3075                                             ir_node *true_block,
3076                                             ir_node *false_block)
3077 {
3078         switch(expression->kind) {
3079         case EXPR_UNARY_NOT: {
3080                 const unary_expression_t *unary_expression = &expression->unary;
3081                 create_condition_evaluation(unary_expression->value, false_block,
3082                                             true_block);
3083                 return NULL;
3084         }
3085         case EXPR_BINARY_LOGICAL_AND: {
3086                 const binary_expression_t *binary_expression = &expression->binary;
3087
3088                 ir_node *cur_block   = get_cur_block();
3089                 ir_node *extra_block = new_immBlock();
3090                 set_cur_block(cur_block);
3091                 create_condition_evaluation(binary_expression->left, extra_block,
3092                                             false_block);
3093                 mature_immBlock(extra_block);
3094                 set_cur_block(extra_block);
3095                 create_condition_evaluation(binary_expression->right, true_block,
3096                                             false_block);
3097                 return NULL;
3098         }
3099         case EXPR_BINARY_LOGICAL_OR: {
3100                 const binary_expression_t *binary_expression = &expression->binary;
3101
3102                 ir_node *cur_block   = get_cur_block();
3103                 ir_node *extra_block = new_immBlock();
3104                 set_cur_block(cur_block);
3105                 create_condition_evaluation(binary_expression->left, true_block,
3106                                             extra_block);
3107                 mature_immBlock(extra_block);
3108                 set_cur_block(extra_block);
3109                 create_condition_evaluation(binary_expression->right, true_block,
3110                                             false_block);
3111                 return NULL;
3112         }
3113         default:
3114                 break;
3115         }
3116
3117         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3118         ir_node  *cond_expr  = _expression_to_firm(expression);
3119         ir_node  *condition  = create_conv(NULL, cond_expr, mode_b);
3120         ir_node  *cond       = new_d_Cond(dbgi, condition);
3121         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3122         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3123
3124         /* set branch prediction info based on __builtin_expect */
3125         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3126                 long               cnst = fold_constant(expression->binary.right);
3127                 cond_jmp_predicate pred;
3128
3129                 if (cnst == 0) {
3130                         pred = COND_JMP_PRED_FALSE;
3131                 } else {
3132                         pred = COND_JMP_PRED_TRUE;
3133                 }
3134                 set_Cond_jmp_pred(cond, pred);
3135         }
3136
3137         add_immBlock_pred(true_block, true_proj);
3138         if (false_block != NULL) {
3139                 add_immBlock_pred(false_block, false_proj);
3140         }
3141
3142         set_cur_block(NULL);
3143         return cond_expr;
3144 }
3145
3146
3147
3148 static void create_declaration_entity(declaration_t *declaration,
3149                                       declaration_kind_t declaration_kind,
3150                                       ir_type *parent_type)
3151 {
3152         type_t    *const type   = skip_typeref(declaration->type);
3153         if (is_type_function(type)) {
3154                 (void) get_function_entity(declaration);
3155                 return;
3156         }
3157
3158         ident     *const id     = new_id_from_str(declaration->symbol->string);
3159         ir_type   *const irtype = get_ir_type(type);
3160         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3161         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3162
3163         declaration->declaration_kind = (unsigned char) declaration_kind;
3164         declaration->v.entity         = entity;
3165         set_entity_variability(entity, variability_uninitialized);
3166         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3167         if (parent_type == get_tls_type())
3168                 set_entity_allocation(entity, allocation_automatic);
3169         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3170                 set_entity_allocation(entity, allocation_static);
3171
3172         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3173                 set_entity_volatility(entity, volatility_is_volatile);
3174         }
3175 }
3176
3177
3178 typedef struct type_path_entry_t type_path_entry_t;
3179 struct type_path_entry_t {
3180         type_t           *type;
3181         ir_initializer_t *initializer;
3182         size_t            index;
3183         declaration_t    *compound_entry;
3184 };
3185
3186 typedef struct type_path_t type_path_t;
3187 struct type_path_t {
3188         type_path_entry_t *path;
3189         type_t            *top_type;
3190         bool               invalid;
3191 };
3192
3193 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3194 {
3195         size_t len = ARR_LEN(path->path);
3196
3197         for(size_t i = 0; i < len; ++i) {
3198                 const type_path_entry_t *entry = & path->path[i];
3199
3200                 type_t *type = skip_typeref(entry->type);
3201                 if (is_type_compound(type)) {
3202                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3203                 } else if (is_type_array(type)) {
3204                         fprintf(stderr, "[%zd]", entry->index);
3205                 } else {
3206                         fprintf(stderr, "-INVALID-");
3207                 }
3208         }
3209         fprintf(stderr, "  (");
3210         print_type(path->top_type);
3211         fprintf(stderr, ")");
3212 }
3213
3214 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3215 {
3216         size_t len = ARR_LEN(path->path);
3217         assert(len > 0);
3218         return & path->path[len-1];
3219 }
3220
3221 static type_path_entry_t *append_to_type_path(type_path_t *path)
3222 {
3223         size_t len = ARR_LEN(path->path);
3224         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3225
3226         type_path_entry_t *result = & path->path[len];
3227         memset(result, 0, sizeof(result[0]));
3228         return result;
3229 }
3230
3231 static size_t get_compound_size(const compound_type_t *type)
3232 {
3233         declaration_t *declaration = type->declaration;
3234         declaration_t *member      = declaration->scope.declarations;
3235         size_t         size        = 0;
3236         for( ; member != NULL; member = member->next) {
3237                 ++size;
3238         }
3239         /* TODO: cache results? */
3240
3241         return size;
3242 }
3243
3244 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3245 {
3246         type_t *orig_top_type = path->top_type;
3247         type_t *top_type      = skip_typeref(orig_top_type);
3248
3249         assert(is_type_compound(top_type) || is_type_array(top_type));
3250
3251         if (ARR_LEN(path->path) == 0) {
3252                 return NULL;
3253         } else {
3254                 type_path_entry_t *top         = get_type_path_top(path);
3255                 ir_initializer_t  *initializer = top->initializer;
3256                 return get_initializer_compound_value(initializer, top->index);
3257         }
3258 }
3259
3260 static void descend_into_subtype(type_path_t *path)
3261 {
3262         type_t *orig_top_type = path->top_type;
3263         type_t *top_type      = skip_typeref(orig_top_type);
3264
3265         assert(is_type_compound(top_type) || is_type_array(top_type));
3266
3267         ir_initializer_t *initializer = get_initializer_entry(path);
3268
3269         type_path_entry_t *top = append_to_type_path(path);
3270         top->type              = top_type;
3271
3272         size_t len;
3273
3274         if (is_type_compound(top_type)) {
3275                 declaration_t *declaration = top_type->compound.declaration;
3276                 declaration_t *entry       = declaration->scope.declarations;
3277
3278                 top->compound_entry = entry;
3279                 top->index          = 0;
3280                 len                 = get_compound_size(&top_type->compound);
3281                 if (entry != NULL)
3282                         path->top_type = entry->type;
3283         } else {
3284                 assert(is_type_array(top_type));
3285                 assert(top_type->array.size > 0);
3286
3287                 top->index     = 0;
3288                 path->top_type = top_type->array.element_type;
3289                 len            = top_type->array.size;
3290         }
3291         if (initializer == NULL
3292                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3293                 initializer = create_initializer_compound(len);
3294                 /* we have to set the entry at the 2nd latest path entry... */
3295                 size_t path_len = ARR_LEN(path->path);
3296                 assert(path_len >= 1);
3297                 if (path_len > 1) {
3298                         type_path_entry_t *entry        = & path->path[path_len-2];
3299                         ir_initializer_t  *tinitializer = entry->initializer;
3300                         set_initializer_compound_value(tinitializer, entry->index,
3301                                                        initializer);
3302                 }
3303         }
3304         top->initializer = initializer;
3305 }
3306
3307 static void ascend_from_subtype(type_path_t *path)
3308 {
3309         type_path_entry_t *top = get_type_path_top(path);
3310
3311         path->top_type = top->type;
3312
3313         size_t len = ARR_LEN(path->path);
3314         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3315 }
3316
3317 static void walk_designator(type_path_t *path, const designator_t *designator)
3318 {
3319         /* designators start at current object type */
3320         ARR_RESIZE(type_path_entry_t, path->path, 1);
3321
3322         for( ; designator != NULL; designator = designator->next) {
3323                 type_path_entry_t *top         = get_type_path_top(path);
3324                 type_t            *orig_type   = top->type;
3325                 type_t            *type        = skip_typeref(orig_type);
3326
3327                 if (designator->symbol != NULL) {
3328                         assert(is_type_compound(type));
3329                         size_t    index  = 0;
3330                         symbol_t *symbol = designator->symbol;
3331
3332                         declaration_t *declaration = type->compound.declaration;
3333                         declaration_t *iter        = declaration->scope.declarations;
3334                         for( ; iter != NULL; iter = iter->next, ++index) {
3335                                 if (iter->symbol == symbol) {
3336                                         break;
3337                                 }
3338                         }
3339                         assert(iter != NULL);
3340
3341                         top->type           = orig_type;
3342                         top->compound_entry = iter;
3343                         top->index          = index;
3344                         orig_type           = iter->type;
3345                 } else {
3346                         expression_t *array_index = designator->array_index;
3347                         assert(designator->array_index != NULL);
3348                         assert(is_type_array(type));
3349                         assert(is_type_valid(array_index->base.type));
3350
3351                         long index = fold_constant(array_index);
3352                         assert(index >= 0);
3353 #ifndef NDEBUG
3354                         if (type->array.size_constant == 1) {
3355                                 long array_size = type->array.size;
3356                                 assert(index < array_size);
3357                         }
3358 #endif
3359
3360                         top->type  = orig_type;
3361                         top->index = (size_t) index;
3362                         orig_type  = type->array.element_type;
3363                 }
3364                 path->top_type = orig_type;
3365
3366                 if (designator->next != NULL) {
3367                         descend_into_subtype(path);
3368                 }
3369         }
3370
3371         path->invalid  = false;
3372 }
3373
3374 static void advance_current_object(type_path_t *path)
3375 {
3376         if (path->invalid) {
3377                 /* TODO: handle this... */
3378                 panic("invalid initializer in ast2firm (excessive elements)");
3379                 return;
3380         }
3381
3382         type_path_entry_t *top = get_type_path_top(path);
3383
3384         type_t *type = skip_typeref(top->type);
3385         if (is_type_union(type)) {
3386                 top->compound_entry = NULL;
3387         } else if (is_type_struct(type)) {
3388                 declaration_t *entry = top->compound_entry;
3389
3390                 top->index++;
3391                 entry               = entry->next;
3392                 top->compound_entry = entry;
3393                 if (entry != NULL) {
3394                         path->top_type = entry->type;
3395                         return;
3396                 }
3397         } else {
3398                 assert(is_type_array(type));
3399
3400                 top->index++;
3401                 if (!type->array.size_constant || top->index < type->array.size) {
3402                         return;
3403                 }
3404         }
3405
3406         /* we're past the last member of the current sub-aggregate, try if we
3407          * can ascend in the type hierarchy and continue with another subobject */
3408         size_t len = ARR_LEN(path->path);
3409
3410         if (len > 1) {
3411                 ascend_from_subtype(path);
3412                 advance_current_object(path);
3413         } else {
3414                 path->invalid = true;
3415         }
3416 }
3417
3418
3419 static ir_initializer_t *create_ir_initializer(
3420                 const initializer_t *initializer, type_t *type);
3421
3422 static ir_initializer_t *create_ir_initializer_value(
3423                 const initializer_value_t *initializer)
3424 {
3425         if (is_type_compound(initializer->value->base.type)) {
3426                 panic("initializer creation for compounds not implemented yet");
3427         }
3428         ir_node *value = expression_to_firm(initializer->value);
3429         return create_initializer_const(value);
3430 }
3431
3432 static ir_initializer_t *create_ir_initializer_list(
3433                 const initializer_list_t *initializer, type_t *type)
3434 {
3435         type_path_t path;
3436         memset(&path, 0, sizeof(path));
3437         path.top_type = type;
3438         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3439
3440         descend_into_subtype(&path);
3441
3442         for(size_t i = 0; i < initializer->len; ++i) {
3443                 const initializer_t *sub_initializer = initializer->initializers[i];
3444
3445                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3446                         walk_designator(&path, sub_initializer->designator.designator);
3447                         continue;
3448                 }
3449
3450                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3451                         /* we might have to descend into types until we're at a scalar
3452                          * type */
3453                         while(true) {
3454                                 type_t *orig_top_type = path.top_type;
3455                                 type_t *top_type      = skip_typeref(orig_top_type);
3456
3457                                 if (is_type_scalar(top_type))
3458                                         break;
3459                                 descend_into_subtype(&path);
3460                         }
3461                 }
3462
3463                 ir_initializer_t *sub_irinitializer
3464                         = create_ir_initializer(sub_initializer, path.top_type);
3465
3466                 size_t path_len = ARR_LEN(path.path);
3467                 assert(path_len >= 1);
3468                 type_path_entry_t *entry        = & path.path[path_len-1];
3469                 ir_initializer_t  *tinitializer = entry->initializer;
3470                 set_initializer_compound_value(tinitializer, entry->index,
3471                                                sub_irinitializer);
3472
3473                 advance_current_object(&path);
3474         }
3475
3476         assert(ARR_LEN(path.path) >= 1);
3477         ir_initializer_t *result = path.path[0].initializer;
3478         DEL_ARR_F(path.path);
3479
3480         return result;
3481 }
3482
3483 static ir_initializer_t *create_ir_initializer_string(
3484                 const initializer_string_t *initializer, type_t *type)
3485 {
3486         type = skip_typeref(type);
3487
3488         size_t            string_len    = initializer->string.size;
3489         assert(type->kind == TYPE_ARRAY);
3490         assert(type->array.size_constant);
3491         size_t            len           = type->array.size;
3492         ir_initializer_t *irinitializer = create_initializer_compound(len);
3493
3494         const char *string = initializer->string.begin;
3495         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3496
3497         for(size_t i = 0; i < len; ++i) {
3498                 char c = 0;
3499                 if (i < string_len)
3500                         c = string[i];
3501
3502                 tarval           *tv = new_tarval_from_long(c, mode);
3503                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3504
3505                 set_initializer_compound_value(irinitializer, i, char_initializer);
3506         }
3507
3508         return irinitializer;
3509 }
3510
3511 static ir_initializer_t *create_ir_initializer_wide_string(
3512                 const initializer_wide_string_t *initializer, type_t *type)
3513 {
3514         size_t            string_len    = initializer->string.size;
3515         assert(type->kind == TYPE_ARRAY);
3516         assert(type->array.size_constant);
3517         size_t            len           = type->array.size;
3518         ir_initializer_t *irinitializer = create_initializer_compound(len);
3519
3520         const wchar_rep_t *string = initializer->string.begin;
3521         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3522
3523         for(size_t i = 0; i < len; ++i) {
3524                 wchar_rep_t c = 0;
3525                 if (i < string_len) {
3526                         c = string[i];
3527                 }
3528                 tarval *tv = new_tarval_from_long(c, mode);
3529                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3530
3531                 set_initializer_compound_value(irinitializer, i, char_initializer);
3532         }
3533
3534         return irinitializer;
3535 }
3536
3537 static ir_initializer_t *create_ir_initializer(
3538                 const initializer_t *initializer, type_t *type)
3539 {
3540         switch(initializer->kind) {
3541                 case INITIALIZER_STRING:
3542                         return create_ir_initializer_string(&initializer->string, type);
3543
3544                 case INITIALIZER_WIDE_STRING:
3545                         return create_ir_initializer_wide_string(&initializer->wide_string,
3546                                                                  type);
3547
3548                 case INITIALIZER_LIST:
3549                         return create_ir_initializer_list(&initializer->list, type);
3550
3551                 case INITIALIZER_VALUE:
3552                         return create_ir_initializer_value(&initializer->value);
3553
3554                 case INITIALIZER_DESIGNATOR:
3555                         panic("unexpected designator initializer found");
3556         }
3557         panic("unknown initializer");
3558 }
3559
3560 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3561                 ir_node *base_addr)
3562 {
3563         if (is_atomic_type(type)) {
3564                 ir_mode *mode = get_type_mode(type);
3565                 tarval  *zero = get_mode_null(mode);
3566                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3567
3568                 /* TODO: bitfields */
3569                 ir_node *mem    = get_store();
3570                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3571                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3572                 set_store(proj_m);
3573         } else {
3574                 assert(is_compound_type(type));
3575
3576                 int n_members;
3577                 if (is_Array_type(type)) {
3578                         assert(has_array_upper_bound(type, 0));
3579                         n_members = get_array_upper_bound_int(type, 0);
3580                 } else {
3581                         n_members = get_compound_n_members(type);
3582                 }
3583
3584                 for(int i = 0; i < n_members; ++i) {
3585                         ir_node *addr;
3586                         ir_type *irtype;
3587                         if (is_Array_type(type)) {
3588                                 ir_entity *entity   = get_array_element_entity(type);
3589                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3590                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3591                                 ir_node   *in[1]    = { cnst };
3592                                 irtype = get_array_element_type(type);
3593                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3594                         } else {
3595                                 ir_entity *member = get_compound_member(type, i);
3596
3597                                 irtype = get_entity_type(member);
3598                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3599                         }
3600
3601                         create_dynamic_null_initializer(irtype, dbgi, addr);
3602                 }
3603         }
3604 }
3605
3606 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3607                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3608 {
3609         switch(get_initializer_kind(initializer)) {
3610         case IR_INITIALIZER_NULL: {
3611                 create_dynamic_null_initializer(type, dbgi, base_addr);
3612                 return;
3613         }
3614         case IR_INITIALIZER_CONST: {
3615                 ir_node *node = get_initializer_const_value(initializer);
3616                 ir_mode *mode = get_irn_mode(node);
3617                 assert(get_type_mode(type) == mode);
3618
3619                 /* TODO: bitfields... */
3620                 ir_node *mem    = get_store();
3621                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3622                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3623                 set_store(proj_m);
3624                 return;
3625         }
3626         case IR_INITIALIZER_TARVAL: {
3627                 tarval  *tv   = get_initializer_tarval_value(initializer);
3628                 ir_mode *mode = get_tarval_mode(tv);
3629                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3630                 assert(get_type_mode(type) == mode);
3631
3632                 /* TODO: bitfields... */
3633                 ir_node *mem    = get_store();
3634                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3635                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3636                 set_store(proj_m);
3637                 return;
3638         }
3639         case IR_INITIALIZER_COMPOUND: {
3640                 assert(is_compound_type(type));
3641                 int n_members;
3642                 if (is_Array_type(type)) {
3643                         assert(has_array_upper_bound(type, 0));
3644                         n_members = get_array_upper_bound_int(type, 0);
3645                 } else {
3646                         n_members = get_compound_n_members(type);
3647                 }
3648
3649                 if (get_initializer_compound_n_entries(initializer)
3650                                 != (unsigned) n_members)
3651                         panic("initializer doesn't match compound type");
3652
3653                 for(int i = 0; i < n_members; ++i) {
3654                         ir_node *addr;
3655                         ir_type *irtype;
3656                         if (is_Array_type(type)) {
3657                                 ir_entity *entity   = get_array_element_entity(type);
3658                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3659                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3660                                 ir_node   *in[1]    = { cnst };
3661                                 irtype = get_array_element_type(type);
3662                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3663                         } else {
3664                                 ir_entity *member = get_compound_member(type, i);
3665
3666                                 irtype = get_entity_type(member);
3667                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3668                         }
3669
3670                         ir_initializer_t *sub_init
3671                                 = get_initializer_compound_value(initializer, i);
3672
3673                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3674                 }
3675                 return;
3676         }
3677         }
3678
3679         panic("invalid IR_INITIALIZER found");
3680 }
3681
3682 static void create_dynamic_initializer(ir_initializer_t *initializer,
3683                 dbg_info *dbgi, ir_entity *entity)
3684 {
3685         ir_node *frame     = get_local_frame(entity);
3686         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3687         ir_type *type      = get_entity_type(entity);
3688
3689         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3690 }
3691
3692 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3693                                      ir_entity *entity, type_t *type)
3694 {
3695         ir_node *memory = get_store();
3696         ir_node *nomem  = new_NoMem();
3697         ir_node *frame  = get_irg_frame(current_ir_graph);
3698         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3699
3700         if (initializer->kind == INITIALIZER_VALUE) {
3701                 initializer_value_t *initializer_value = &initializer->value;
3702
3703                 ir_node *value = expression_to_firm(initializer_value->value);
3704                 type = skip_typeref(type);
3705                 assign_value(dbgi, addr, type, value);
3706                 return;
3707         }
3708
3709         if (!is_constant_initializer(initializer)) {
3710                 ir_initializer_t *irinitializer
3711                         = create_ir_initializer(initializer, type);
3712
3713                 create_dynamic_initializer(irinitializer, dbgi, entity);
3714                 return;
3715         }
3716
3717         /* create the ir_initializer */
3718         ir_graph *const old_current_ir_graph = current_ir_graph;
3719         current_ir_graph = get_const_code_irg();
3720
3721         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3722
3723         assert(current_ir_graph == get_const_code_irg());
3724         current_ir_graph = old_current_ir_graph;
3725
3726         /* create a "template" entity which is copied to the entity on the stack */
3727         ident     *const id          = id_unique("initializer.%u");
3728         ir_type   *const irtype      = get_ir_type(type);
3729         ir_type   *const global_type = get_glob_type();
3730         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3731         set_entity_ld_ident(init_entity, id);
3732
3733         set_entity_variability(init_entity, variability_initialized);
3734         set_entity_visibility(init_entity, visibility_local);
3735         set_entity_allocation(init_entity, allocation_static);
3736
3737         set_entity_initializer(init_entity, irinitializer);
3738
3739         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3740         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3741
3742         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3743         set_store(copyb_mem);
3744 }
3745
3746 static void create_initializer_local_variable_entity(declaration_t *declaration)
3747 {
3748         initializer_t *initializer = declaration->init.initializer;
3749         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3750         ir_entity     *entity      = declaration->v.entity;
3751         type_t        *type        = declaration->type;
3752         create_local_initializer(initializer, dbgi, entity, type);
3753 }
3754
3755 static void create_declaration_initializer(declaration_t *declaration)
3756 {
3757         initializer_t *initializer = declaration->init.initializer;
3758         if (initializer == NULL)
3759                 return;
3760
3761         declaration_kind_t declaration_kind
3762                 = (declaration_kind_t) declaration->declaration_kind;
3763         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3764                 create_initializer_local_variable_entity(declaration);
3765                 return;
3766         }
3767
3768         type_t *type = skip_typeref(declaration->type);
3769
3770         if (initializer->kind == INITIALIZER_VALUE) {
3771                 initializer_value_t *initializer_value = &initializer->value;
3772                 dbg_info            *dbgi
3773                         = get_dbg_info(&declaration->source_position);
3774
3775                 ir_node *value = expression_to_firm(initializer_value->value);
3776                 value = do_strict_conv(dbgi, value);
3777
3778                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3779                         set_value(declaration->v.value_number, value);
3780                 } else {
3781                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3782
3783                         ir_entity *entity = declaration->v.entity;
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_atomic_ent_value(entity, value);
3791                 }
3792         } else {
3793                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3794                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3795
3796                 ir_entity        *entity        = declaration->v.entity;
3797                 ir_initializer_t *irinitializer
3798                         = create_ir_initializer(initializer, type);
3799
3800                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3801                         set_entity_variability(entity, variability_constant);
3802                 } else {
3803                         set_entity_variability(entity, variability_initialized);
3804                 }
3805                 set_entity_initializer(entity, irinitializer);
3806         }
3807 }
3808
3809 static void create_variable_length_array(declaration_t *declaration)
3810 {
3811         /* initializers are not allowed for VLAs */
3812         assert(declaration->init.initializer == NULL);
3813
3814         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3815         declaration->v.vla_base       = NULL;
3816
3817         /* TODO: record VLA somewhere so we create the free node when we leave
3818          * it's scope */
3819 }
3820
3821 static void allocate_variable_length_array(declaration_t *declaration)
3822 {
3823         /* initializers are not allowed for VLAs */
3824         assert(declaration->init.initializer == NULL);
3825         assert(get_cur_block() != NULL);
3826
3827         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3828         type_t   *type      = declaration->type;
3829         ir_type  *el_type   = get_ir_type(type->array.element_type);
3830
3831         /* make sure size_node is calculated */
3832         get_type_size(type);
3833         ir_node  *elems = type->array.size_node;
3834         ir_node  *mem   = get_store();
3835         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3836
3837         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3838         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3839         set_store(proj_m);
3840
3841         assert(declaration->declaration_kind
3842                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3843         declaration->v.vla_base       = addr;
3844 }
3845
3846 /**
3847  * Creates a Firm local variable from a declaration.
3848  */
3849 static void create_local_variable(declaration_t *declaration)
3850 {
3851         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3852
3853         bool needs_entity = declaration->address_taken;
3854         type_t *type = skip_typeref(declaration->type);
3855
3856         /* is it a variable length array? */
3857         if (is_type_array(type) && !type->array.size_constant) {
3858                 create_variable_length_array(declaration);
3859                 return;
3860         } else if (is_type_array(type) || is_type_compound(type)) {
3861                 needs_entity = true;
3862         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3863                 needs_entity = true;
3864         }
3865
3866         if (needs_entity) {
3867                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3868                 create_declaration_entity(declaration,
3869                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3870                                           frame_type);
3871         } else {
3872                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3873                 declaration->v.value_number   = next_value_number_function;
3874                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3875                 ++next_value_number_function;
3876         }
3877 }
3878
3879 static void create_local_static_variable(declaration_t *declaration)
3880 {
3881         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3882
3883         type_t    *const type        = skip_typeref(declaration->type);
3884         ir_type   *const global_type = get_glob_type();
3885         ir_type   *const irtype      = get_ir_type(type);
3886         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3887
3888         size_t l = strlen(declaration->symbol->string);
3889         char   buf[l + sizeof(".%u")];
3890         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3891         ident     *const id = id_unique(buf);
3892
3893         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3894
3895         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3896                 set_entity_volatility(entity, volatility_is_volatile);
3897         }
3898
3899         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3900         declaration->v.entity         = entity;
3901         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3902         set_entity_variability(entity, variability_uninitialized);
3903         set_entity_visibility(entity, visibility_local);
3904         set_entity_allocation(entity, allocation_static);
3905
3906         ir_graph *const old_current_ir_graph = current_ir_graph;
3907         current_ir_graph = get_const_code_irg();
3908
3909         create_declaration_initializer(declaration);
3910
3911         assert(current_ir_graph == get_const_code_irg());
3912         current_ir_graph = old_current_ir_graph;
3913 }
3914
3915
3916
3917 static void return_statement_to_firm(return_statement_t *statement)
3918 {
3919         if (get_cur_block() == NULL)
3920                 return;
3921
3922         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3923         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3924
3925
3926         ir_node *in[1];
3927         int      in_len;
3928         if (get_method_n_ress(func_irtype) > 0) {
3929                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3930
3931                 if (statement->value != NULL) {
3932                         ir_node *node = expression_to_firm(statement->value);
3933                         node  = do_strict_conv(dbgi, node);
3934                         in[0] = node;
3935                 } else {
3936                         ir_mode *mode;
3937                         if (is_compound_type(res_type)) {
3938                                 mode = mode_P_data;
3939                         } else {
3940                                 mode = get_type_mode(res_type);
3941                         }
3942                         in[0] = new_Unknown(mode);
3943                 }
3944                 in_len = 1;
3945         } else {
3946                 /* build return_value for its side effects */
3947                 if (statement->value != NULL) {
3948                         expression_to_firm(statement->value);
3949                 }
3950                 in_len = 0;
3951         }
3952
3953         ir_node  *store = get_store();
3954         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3955
3956         ir_node *end_block = get_irg_end_block(current_ir_graph);
3957         add_immBlock_pred(end_block, ret);
3958
3959         set_cur_block(NULL);
3960 }
3961
3962 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3963 {
3964         if (get_cur_block() == NULL)
3965                 return NULL;
3966
3967         return expression_to_firm(statement->expression);
3968 }
3969
3970 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3971 {
3972         declaration_t *declaration = compound->scope.declarations;
3973         for( ; declaration != NULL; declaration = declaration->next) {
3974                 create_local_declaration(declaration);
3975         }
3976
3977         ir_node     *result    = NULL;
3978         statement_t *statement = compound->statements;
3979         for( ; statement != NULL; statement = statement->base.next) {
3980                 if (statement->base.next == NULL
3981                                 && statement->kind == STATEMENT_EXPRESSION) {
3982                         result = expression_statement_to_firm(
3983                                         &statement->expression);
3984                         break;
3985                 }
3986                 statement_to_firm(statement);
3987         }
3988
3989         return result;
3990 }
3991
3992 static void create_global_variable(declaration_t *declaration)
3993 {
3994         ir_visibility  vis;
3995         ir_type       *var_type;
3996         switch ((storage_class_tag_t)declaration->storage_class) {
3997                 case STORAGE_CLASS_STATIC:
3998                         vis = visibility_local;
3999                         goto global_var;
4000
4001                 case STORAGE_CLASS_EXTERN:
4002                         vis = visibility_external_allocated;
4003                         goto global_var;
4004
4005                 case STORAGE_CLASS_NONE:
4006                         vis = visibility_external_visible;
4007                         goto global_var;
4008
4009                 case STORAGE_CLASS_THREAD:
4010                         vis = visibility_external_visible;
4011                         goto tls_var;
4012
4013                 case STORAGE_CLASS_THREAD_EXTERN:
4014                         vis = visibility_external_allocated;
4015                         goto tls_var;
4016
4017                 case STORAGE_CLASS_THREAD_STATIC:
4018                         vis = visibility_local;
4019                         goto tls_var;
4020
4021 tls_var:
4022                         var_type = get_tls_type();
4023                         goto create_var;
4024
4025 global_var:
4026                         var_type = get_glob_type();
4027                         goto create_var;
4028
4029 create_var:
4030                         create_declaration_entity(declaration,
4031                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4032                                                   var_type);
4033                         if (!is_type_function(skip_typeref(declaration->type))) {
4034                                 set_entity_visibility(declaration->v.entity, vis);
4035                         }
4036
4037                         return;
4038
4039                 case STORAGE_CLASS_TYPEDEF:
4040                 case STORAGE_CLASS_AUTO:
4041                 case STORAGE_CLASS_REGISTER:
4042                 case STORAGE_CLASS_ENUM_ENTRY:
4043                         break;
4044         }
4045         panic("Invalid storage class for global variable");
4046 }
4047
4048 static void create_local_declaration(declaration_t *declaration)
4049 {
4050         if (declaration->namespc != NAMESPACE_NORMAL)
4051                 return;
4052         /* construct type */
4053         (void) get_ir_type(declaration->type);
4054         if (declaration->symbol == NULL) {
4055                 return;
4056         }
4057
4058         type_t *type = skip_typeref(declaration->type);
4059
4060         switch ((storage_class_tag_t) declaration->storage_class) {
4061         case STORAGE_CLASS_STATIC:
4062                 create_local_static_variable(declaration);
4063                 return;
4064         case STORAGE_CLASS_EXTERN:
4065                 create_global_variable(declaration);
4066                 create_declaration_initializer(declaration);
4067                 return;
4068         case STORAGE_CLASS_NONE:
4069         case STORAGE_CLASS_AUTO:
4070         case STORAGE_CLASS_REGISTER:
4071                 if (is_type_function(type)) {
4072                         if (declaration->init.statement != NULL) {
4073                                 panic("nested functions not supported yet");
4074                         } else {
4075                                 get_function_entity(declaration);
4076                         }
4077                 } else {
4078                         create_local_variable(declaration);
4079                 }
4080                 return;
4081         case STORAGE_CLASS_ENUM_ENTRY:
4082                 /* should already be handled */
4083                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4084                 return;
4085         case STORAGE_CLASS_TYPEDEF:
4086                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4087                 return;
4088         case STORAGE_CLASS_THREAD:
4089         case STORAGE_CLASS_THREAD_EXTERN:
4090         case STORAGE_CLASS_THREAD_STATIC:
4091                 break;
4092         }
4093         panic("invalid storage class found");
4094 }
4095
4096 static void initialize_local_declaration(declaration_t *declaration)
4097 {
4098         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4099                 return;
4100
4101         switch ((declaration_kind_t) declaration->declaration_kind) {
4102         case DECLARATION_KIND_LOCAL_VARIABLE:
4103         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4104                 create_declaration_initializer(declaration);
4105                 return;
4106
4107         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4108                 allocate_variable_length_array(declaration);
4109                 return;
4110
4111         case DECLARATION_KIND_LABEL_BLOCK:
4112         case DECLARATION_KIND_COMPOUND_MEMBER:
4113         case DECLARATION_KIND_GLOBAL_VARIABLE:
4114         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4115         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4116         case DECLARATION_KIND_FUNCTION:
4117         case DECLARATION_KIND_TYPE:
4118         case DECLARATION_KIND_ENUM_ENTRY:
4119                 return;
4120
4121         case DECLARATION_KIND_UNKNOWN:
4122                 panic("can't initialize unknwon declaration");
4123         }
4124         panic("invalid declaration kind");
4125 }
4126
4127 static void declaration_statement_to_firm(declaration_statement_t *statement)
4128 {
4129         declaration_t *declaration = statement->declarations_begin;
4130         declaration_t *end         = statement->declarations_end->next;
4131         for( ; declaration != end; declaration = declaration->next) {
4132                 if (declaration->namespc != NAMESPACE_NORMAL)
4133                         continue;
4134                 initialize_local_declaration(declaration);
4135         }
4136 }
4137
4138 static void if_statement_to_firm(if_statement_t *statement)
4139 {
4140         ir_node *cur_block = get_cur_block();
4141
4142         ir_node *fallthrough_block = NULL;
4143
4144         /* the true (blocks) */
4145         ir_node *true_block = NULL;
4146         if (statement->true_statement != NULL) {
4147                 true_block = new_immBlock();
4148                 statement_to_firm(statement->true_statement);
4149                 if (get_cur_block() != NULL) {
4150                         ir_node *jmp = new_Jmp();
4151                         if (fallthrough_block == NULL)
4152                                 fallthrough_block = new_immBlock();
4153                         add_immBlock_pred(fallthrough_block, jmp);
4154                 }
4155         }
4156
4157         /* the false (blocks) */
4158         ir_node *false_block = NULL;
4159         if (statement->false_statement != NULL) {
4160                 false_block = new_immBlock();
4161
4162                 statement_to_firm(statement->false_statement);
4163                 if (get_cur_block() != NULL) {
4164                         ir_node *jmp = new_Jmp();
4165                         if (fallthrough_block == NULL)
4166                                 fallthrough_block = new_immBlock();
4167                         add_immBlock_pred(fallthrough_block, jmp);
4168                 }
4169         }
4170
4171         /* create the condition */
4172         if (cur_block != NULL) {
4173                 if (true_block == NULL || false_block == NULL) {
4174                         if (fallthrough_block == NULL)
4175                                 fallthrough_block = new_immBlock();
4176                         if (true_block == NULL)
4177                                 true_block = fallthrough_block;
4178                         if (false_block == NULL)
4179                                 false_block = fallthrough_block;
4180                 }
4181
4182                 set_cur_block(cur_block);
4183                 create_condition_evaluation(statement->condition, true_block,
4184                                             false_block);
4185         }
4186
4187         mature_immBlock(true_block);
4188         if (false_block != fallthrough_block && false_block != NULL) {
4189                 mature_immBlock(false_block);
4190         }
4191         if (fallthrough_block != NULL) {
4192                 mature_immBlock(fallthrough_block);
4193         }
4194
4195         set_cur_block(fallthrough_block);
4196 }
4197
4198 static void while_statement_to_firm(while_statement_t *statement)
4199 {
4200         ir_node *jmp = NULL;
4201         if (get_cur_block() != NULL) {
4202                 jmp = new_Jmp();
4203         }
4204
4205         /* create the header block */
4206         ir_node *header_block = new_immBlock();
4207         if (jmp != NULL) {
4208                 add_immBlock_pred(header_block, jmp);
4209         }
4210
4211         /* the loop body */
4212         ir_node *old_continue_label = continue_label;
4213         ir_node *old_break_label    = break_label;
4214         continue_label              = header_block;
4215         break_label                 = NULL;
4216
4217         ir_node *body_block = new_immBlock();
4218         statement_to_firm(statement->body);
4219         ir_node *false_block = break_label;
4220
4221         assert(continue_label == header_block);
4222         continue_label = old_continue_label;
4223         break_label    = old_break_label;
4224
4225         if (get_cur_block() != NULL) {
4226                 jmp = new_Jmp();
4227                 add_immBlock_pred(header_block, jmp);
4228         }
4229
4230         /* shortcut for while(true) */
4231         if (is_constant_expression(statement->condition)
4232                         && fold_constant(statement->condition) != 0) {
4233                 set_cur_block(header_block);
4234                 ir_node *header_jmp = new_Jmp();
4235                 add_immBlock_pred(body_block, header_jmp);
4236
4237                 keep_alive(body_block);
4238                 set_cur_block(body_block);
4239                 keep_alive(get_store());
4240         } else {
4241                 if (false_block == NULL) {
4242                         false_block = new_immBlock();
4243                 }
4244
4245                 /* create the condition */
4246                 set_cur_block(header_block);
4247
4248                 create_condition_evaluation(statement->condition, body_block,
4249                                             false_block);
4250         }
4251
4252         mature_immBlock(body_block);
4253         mature_immBlock(header_block);
4254         if (false_block != NULL) {
4255                 mature_immBlock(false_block);
4256         }
4257
4258         set_cur_block(false_block);
4259 }
4260
4261 static void do_while_statement_to_firm(do_while_statement_t *statement)
4262 {
4263         ir_node *jmp = NULL;
4264         if (get_cur_block() != NULL) {
4265                 jmp = new_Jmp();
4266         }
4267
4268         /* create the header block */
4269         ir_node *header_block = new_immBlock();
4270
4271         /* the loop body */
4272         ir_node *body_block = new_immBlock();
4273         if (jmp != NULL) {
4274                 add_immBlock_pred(body_block, jmp);
4275         }
4276
4277         ir_node *old_continue_label = continue_label;
4278         ir_node *old_break_label    = break_label;
4279         continue_label              = header_block;
4280         break_label                 = NULL;
4281
4282         statement_to_firm(statement->body);
4283         ir_node *false_block = break_label;
4284
4285         assert(continue_label == header_block);
4286         continue_label = old_continue_label;
4287         break_label    = old_break_label;
4288
4289         if (get_cur_block() != NULL) {
4290                 ir_node *body_jmp = new_Jmp();
4291                 add_immBlock_pred(header_block, body_jmp);
4292                 mature_immBlock(header_block);
4293         }
4294
4295         if (false_block == NULL) {
4296                 false_block = new_immBlock();
4297         }
4298
4299         /* create the condition */
4300         set_cur_block(header_block);
4301
4302         create_condition_evaluation(statement->condition, body_block, false_block);
4303         mature_immBlock(body_block);
4304         mature_immBlock(header_block);
4305         if (false_block != NULL) {
4306                 mature_immBlock(false_block);
4307         }
4308
4309         set_cur_block(false_block);
4310 }
4311
4312 static void for_statement_to_firm(for_statement_t *statement)
4313 {
4314         ir_node *jmp = NULL;
4315
4316         /* create declarations */
4317         declaration_t *declaration = statement->scope.declarations;
4318         for( ; declaration != NULL; declaration = declaration->next) {
4319                 create_local_declaration(declaration);
4320         }
4321         declaration = statement->scope.declarations;
4322         for( ; declaration != NULL; declaration = declaration->next) {
4323                 initialize_local_declaration(declaration);
4324         }
4325
4326         if (get_cur_block() != NULL) {
4327                 if (statement->initialisation != NULL) {
4328                         expression_to_firm(statement->initialisation);
4329                 }
4330
4331                 jmp = new_Jmp();
4332         }
4333
4334
4335         /* create the step block */
4336         ir_node *const step_block = new_immBlock();
4337         if (statement->step != NULL) {
4338                 expression_to_firm(statement->step);
4339         }
4340         ir_node *const step_jmp = new_Jmp();
4341
4342         /* create the header block */
4343         ir_node *const header_block = new_immBlock();
4344         if (jmp != NULL) {
4345                 add_immBlock_pred(header_block, jmp);
4346         }
4347         add_immBlock_pred(header_block, step_jmp);
4348
4349         /* the false block */
4350         ir_node *const false_block = new_immBlock();
4351
4352         /* the loop body */
4353         ir_node * body_block;
4354         if (statement->body != NULL) {
4355                 ir_node *const old_continue_label = continue_label;
4356                 ir_node *const old_break_label    = break_label;
4357                 continue_label = step_block;
4358                 break_label    = false_block;
4359
4360                 body_block = new_immBlock();
4361                 statement_to_firm(statement->body);
4362
4363                 assert(continue_label == step_block);
4364                 assert(break_label    == false_block);
4365                 continue_label = old_continue_label;
4366                 break_label    = old_break_label;
4367
4368                 if (get_cur_block() != NULL) {
4369                         jmp = new_Jmp();
4370                         add_immBlock_pred(step_block, jmp);
4371                 }
4372         } else {
4373                 body_block = step_block;
4374         }
4375
4376         /* create the condition */
4377         set_cur_block(header_block);
4378         if (statement->condition != NULL) {
4379                 create_condition_evaluation(statement->condition, body_block,
4380                                             false_block);
4381         } else {
4382                 keep_alive(header_block);
4383                 keep_alive(get_store());
4384                 jmp = new_Jmp();
4385                 add_immBlock_pred(body_block, jmp);
4386         }
4387
4388         mature_immBlock(body_block);
4389         mature_immBlock(false_block);
4390         mature_immBlock(step_block);
4391         mature_immBlock(header_block);
4392         mature_immBlock(false_block);
4393
4394         set_cur_block(false_block);
4395 }
4396
4397 static void create_jump_statement(const statement_t *statement,
4398                                   ir_node *target_block)
4399 {
4400         if (get_cur_block() == NULL)
4401                 return;
4402
4403         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4404         ir_node  *jump = new_d_Jmp(dbgi);
4405         add_immBlock_pred(target_block, jump);
4406
4407         set_cur_block(NULL);
4408 }
4409
4410 static ir_node *get_break_label(void)
4411 {
4412         if (break_label == NULL) {
4413                 ir_node *cur_block = get_cur_block();
4414                 break_label = new_immBlock();
4415                 set_cur_block(cur_block);
4416         }
4417         return break_label;
4418 }
4419
4420 static void switch_statement_to_firm(switch_statement_t *statement)
4421 {
4422         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4423
4424         ir_node *expression  = expression_to_firm(statement->expression);
4425         ir_node *cond        = new_d_Cond(dbgi, expression);
4426
4427         set_cur_block(NULL);
4428
4429         ir_node *const old_switch_cond       = current_switch_cond;
4430         ir_node *const old_break_label       = break_label;
4431         const bool     old_saw_default_label = saw_default_label;
4432         saw_default_label                    = false;
4433         current_switch_cond                  = cond;
4434         break_label                          = NULL;
4435         switch_statement_t *const old_switch = current_switch;
4436         current_switch                       = statement;
4437
4438         /* determine a free number for the default label */
4439         unsigned long num_cases = 0;
4440         long def_nr = 0;
4441         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4442                 if (l->expression == NULL) {
4443                         /* default case */
4444                         continue;
4445                 }
4446                 if (l->last_case >= l->first_case)
4447                         num_cases += l->last_case - l->first_case;
4448                 if (l->last_case > def_nr)
4449                         def_nr = l->last_case;
4450         }
4451
4452         if (def_nr + 1 < 0) {
4453                 /* Bad: an overflow occurred, we cannot be sure that the
4454          * maximum + 1 is a free number. Scan the values a second
4455          * time to find a free number.
4456          */
4457                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4458                 unsigned long i;
4459
4460                 memset(bits, 0, (num_cases + 7) >> 3);
4461                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4462                         if (l->expression == NULL) {
4463                                 /* default case */
4464                                 continue;
4465                         }
4466                         for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4467                                 if (cns >= 0 && (unsigned long)cns < num_cases)
4468                                         bits[cns >> 3] |= (1 << (cns & 7));
4469                         }
4470                 }
4471                 /* We look at the first num_cases constants:
4472                  * Either they are densed, so we took the last (num_cases)
4473                  * one, or they are non densed, so we will find one free
4474                  * there...
4475                  */
4476                 for (i = 0; i < num_cases; ++i)
4477                         if ((bits[i >> 3] & (i & 7)) == 0)
4478                                 break;
4479
4480                 free(bits);
4481                 def_nr = i;
4482         } else {
4483                 ++def_nr;
4484         }
4485         statement->default_proj_nr = def_nr;
4486
4487         if (statement->body != NULL) {
4488                 statement_to_firm(statement->body);
4489         }
4490
4491         if (get_cur_block() != NULL) {
4492                 ir_node *jmp = new_Jmp();
4493                 add_immBlock_pred(get_break_label(), jmp);
4494         }
4495
4496         if (!saw_default_label) {
4497                 set_cur_block(get_nodes_block(cond));
4498                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4499                                                         statement->default_proj_nr);
4500                 add_immBlock_pred(get_break_label(), proj);
4501         }
4502
4503         if (break_label != NULL) {
4504                 mature_immBlock(break_label);
4505         }
4506         set_cur_block(break_label);
4507
4508         assert(current_switch_cond == cond);
4509         current_switch      = old_switch;
4510         current_switch_cond = old_switch_cond;
4511         break_label         = old_break_label;
4512         saw_default_label   = old_saw_default_label;
4513 }
4514
4515 static void case_label_to_firm(const case_label_statement_t *statement)
4516 {
4517         if (statement->is_empty)
4518                 return;
4519
4520         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4521
4522         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4523
4524         ir_node *proj;
4525         ir_node *old_block = get_nodes_block(current_switch_cond);
4526         ir_node *block     = new_immBlock();
4527
4528         set_cur_block(old_block);
4529         if (statement->expression != NULL) {
4530                 long pn     = statement->first_case;
4531                 long end_pn = statement->last_case;
4532                 assert(pn <= end_pn);
4533                 /* create jumps for all cases in the given range */
4534                 do {
4535                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4536                         add_immBlock_pred(block, proj);
4537                 } while(pn++ < end_pn);
4538         } else {
4539                 saw_default_label = true;
4540                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4541                                          current_switch->default_proj_nr);
4542
4543                 add_immBlock_pred(block, proj);
4544         }
4545
4546         if (fallthrough != NULL) {
4547                 add_immBlock_pred(block, fallthrough);
4548         }
4549         mature_immBlock(block);
4550         set_cur_block(block);
4551
4552         if (statement->statement != NULL) {
4553                 statement_to_firm(statement->statement);
4554         }
4555 }
4556
4557 static ir_node *get_label_block(declaration_t *label)
4558 {
4559         assert(label->namespc == NAMESPACE_LABEL);
4560
4561         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4562                 return label->v.block;
4563         }
4564         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4565
4566         ir_node *old_cur_block = get_cur_block();
4567         ir_node *block         = new_immBlock();
4568         set_cur_block(old_cur_block);
4569
4570         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4571         label->v.block          = block;
4572
4573         ARR_APP1(ir_node *, imature_blocks, block);
4574
4575         return block;
4576 }
4577
4578 static void label_to_firm(const label_statement_t *statement)
4579 {
4580         ir_node *block = get_label_block(statement->label);
4581
4582         if (get_cur_block() != NULL) {
4583                 ir_node *jmp = new_Jmp();
4584                 add_immBlock_pred(block, jmp);
4585         }
4586
4587         set_cur_block(block);
4588         keep_alive(get_store());
4589         keep_alive(block);
4590
4591         if (statement->statement != NULL) {
4592                 statement_to_firm(statement->statement);
4593         }
4594 }
4595
4596 static void goto_to_firm(const goto_statement_t *statement)
4597 {
4598         if (get_cur_block() == NULL)
4599                 return;
4600
4601         ir_node *block = get_label_block(statement->label);
4602         ir_node *jmp   = new_Jmp();
4603         add_immBlock_pred(block, jmp);
4604
4605         set_cur_block(NULL);
4606 }
4607
4608 static void asm_statement_to_firm(const asm_statement_t *statement)
4609 {
4610         bool needs_memory = false;
4611
4612         if (statement->is_volatile) {
4613                 needs_memory = true;
4614         }
4615
4616         size_t         n_clobbers = 0;
4617         asm_clobber_t *clobber    = statement->clobbers;
4618         for( ; clobber != NULL; clobber = clobber->next) {
4619                 const char *clobber_str = clobber->clobber.begin;
4620
4621                 if (!be_is_valid_clobber(clobber_str)) {
4622                         errorf(&statement->base.source_position,
4623                                    "invalid clobber '%s' specified", clobber->clobber);
4624                         continue;
4625                 }
4626
4627                 if (strcmp(clobber_str, "memory") == 0) {
4628                         needs_memory = true;
4629                         continue;
4630                 }
4631
4632                 ident *id = new_id_from_str(clobber_str);
4633                 obstack_ptr_grow(&asm_obst, id);
4634                 ++n_clobbers;
4635         }
4636         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4637         ident **clobbers = NULL;
4638         if (n_clobbers > 0) {
4639                 clobbers = obstack_finish(&asm_obst);
4640         }
4641
4642         size_t n_inputs  = 0;
4643         asm_argument_t *argument = statement->inputs;
4644         for ( ; argument != NULL; argument = argument->next)
4645                 n_inputs++;
4646         size_t n_outputs = 0;
4647         argument = statement->outputs;
4648         for ( ; argument != NULL; argument = argument->next)
4649                 n_outputs++;
4650
4651         unsigned next_pos = 0;
4652
4653         ir_node *ins[n_inputs + n_outputs + 1];
4654         size_t   in_size = 0;
4655
4656         ir_asm_constraint tmp_in_constraints[n_outputs];
4657
4658         const expression_t *out_exprs[n_outputs];
4659         ir_node            *out_addrs[n_outputs];
4660         size_t              out_size = 0;
4661
4662         argument = statement->outputs;
4663         for ( ; argument != NULL; argument = argument->next) {
4664                 const char *constraints = argument->constraints.begin;
4665                 asm_constraint_flags_t asm_flags
4666                         = be_parse_asm_constraints(constraints);
4667
4668                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4669                         errorf(&statement->base.source_position,
4670                                "some constraints in '%s' are not supported", constraints);
4671                         continue;
4672                 }
4673                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4674                         errorf(&statement->base.source_position,
4675                                "some constraints in '%s' are invalid", constraints);
4676                         continue;
4677                 }
4678                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4679                         errorf(&statement->base.source_position,
4680                                "no write flag specified for output constraints '%s'",
4681                                constraints);
4682                         continue;
4683                 }
4684
4685                 unsigned pos = next_pos++;
4686                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4687                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4688                         expression_t *expr = argument->expression;
4689                         ir_node      *addr = expression_to_addr(expr);
4690                         /* in+output, construct an artifical same_as constraint on the
4691                          * input */
4692                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4693                                 char     buf[64];
4694                                 ir_node *value = get_value_from_lvalue(expr, addr);
4695
4696                                 snprintf(buf, sizeof(buf), "%d", pos);
4697
4698                                 ir_asm_constraint constraint;
4699                                 constraint.pos              = pos;
4700                                 constraint.constraint       = new_id_from_str(buf);
4701                                 constraint.mode             = get_ir_mode(expr->base.type);
4702                                 tmp_in_constraints[in_size] = constraint;
4703                                 ins[in_size] = value;
4704
4705                                 ++in_size;
4706                         }
4707
4708                         out_exprs[out_size] = expr;
4709                         out_addrs[out_size] = addr;
4710                         ++out_size;
4711                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4712                         /* pure memory ops need no input (but we have to make sure we
4713                          * attach to the memory) */
4714                         assert(! (asm_flags &
4715                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4716                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4717                         needs_memory = true;
4718
4719                         /* we need to attach the address to the inputs */
4720                         expression_t *expr = argument->expression;
4721
4722                         ir_asm_constraint constraint;
4723                         constraint.pos              = pos;
4724                         constraint.constraint       = new_id_from_str(constraints);
4725                         constraint.mode             = NULL;
4726                         tmp_in_constraints[in_size] = constraint;
4727
4728                         ins[in_size]          = expression_to_addr(expr);
4729                         ++in_size;
4730                         continue;
4731                 } else {
4732                         errorf(&statement->base.source_position,
4733                                "only modifiers but no place set in constraints '%s'",
4734                                constraints);
4735                         continue;
4736                 }
4737
4738                 ir_asm_constraint constraint;
4739                 constraint.pos        = pos;
4740                 constraint.constraint = new_id_from_str(constraints);
4741                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4742
4743                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4744         }
4745         assert(obstack_object_size(&asm_obst)
4746                         == out_size * sizeof(ir_asm_constraint));
4747         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4748
4749
4750         obstack_grow(&asm_obst, tmp_in_constraints,
4751                      in_size * sizeof(tmp_in_constraints[0]));
4752         /* find and count input and output arguments */
4753         argument = statement->inputs;
4754         for( ; argument != NULL; argument = argument->next) {
4755                 const char *constraints = argument->constraints.begin;
4756                 asm_constraint_flags_t asm_flags
4757                         = be_parse_asm_constraints(constraints);
4758
4759                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4760                         errorf(&statement->base.source_position,
4761                                "some constraints in '%s' are not supported", constraints);
4762                         continue;
4763                 }
4764                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4765                         errorf(&statement->base.source_position,
4766                                "some constraints in '%s' are invalid", constraints);
4767                         continue;
4768                 }
4769                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4770                         errorf(&statement->base.source_position,
4771                                "write flag specified for input constraints '%s'",
4772                                constraints);
4773                         continue;
4774                 }
4775
4776                 ir_node *input;
4777                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4778                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4779                         /* we can treat this as "normal" input */
4780                         input = expression_to_firm(argument->expression);
4781                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4782                         /* pure memory ops need no input (but we have to make sure we
4783                          * attach to the memory) */
4784                         assert(! (asm_flags &
4785                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4786                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4787                         needs_memory = true;
4788                         input = expression_to_addr(argument->expression);
4789                 } else {
4790                         errorf(&statement->base.source_position,
4791                                "only modifiers but no place set in constraints '%s'",
4792                                constraints);
4793                         continue;
4794                 }
4795
4796                 ir_asm_constraint constraint;
4797                 constraint.pos        = next_pos++;
4798                 constraint.constraint = new_id_from_str(constraints);
4799                 constraint.mode       = get_irn_mode(input);
4800
4801                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4802                 ins[in_size++] = input;
4803         }
4804
4805         if (needs_memory) {
4806                 ir_asm_constraint constraint;
4807                 constraint.pos        = next_pos++;
4808                 constraint.constraint = new_id_from_str("");
4809                 constraint.mode       = mode_M;
4810
4811                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4812                 ins[in_size++] = get_store();
4813         }
4814
4815         assert(obstack_object_size(&asm_obst)
4816                         == in_size * sizeof(ir_asm_constraint));
4817         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4818
4819         /* create asm node */
4820         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4821
4822         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4823
4824         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4825                                   out_size, output_constraints,
4826                                   n_clobbers, clobbers, asm_text);
4827
4828         if (statement->is_volatile) {
4829                 set_irn_pinned(node, op_pin_state_pinned);
4830         } else {
4831                 set_irn_pinned(node, op_pin_state_floats);
4832         }
4833
4834         /* create output projs & connect them */
4835         if (needs_memory) {
4836                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4837                 set_store(projm);
4838         }
4839
4840         size_t i;
4841         for (i = 0; i < out_size; ++i) {
4842                 const expression_t *out_expr = out_exprs[i];
4843                 long                pn       = i;
4844                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4845                 ir_node            *proj     = new_Proj(node, mode, pn);
4846                 ir_node            *addr     = out_addrs[i];
4847
4848                 set_value_for_expression_addr(out_expr, proj, addr);
4849         }
4850 }
4851
4852 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4853         statement_to_firm(statement->try_statement);
4854         warningf(&statement->base.source_position, "structured exception handling ignored");
4855 }
4856
4857 static void     leave_statement_to_firm(leave_statement_t *statement) {
4858         errorf(&statement->base.source_position, "__leave not supported yet");
4859 }
4860
4861 /**
4862  * Transform a statement.
4863  */
4864 static void statement_to_firm(statement_t *statement)
4865 {
4866 #ifndef NDEBUG
4867         assert(!statement->base.transformed);
4868         statement->base.transformed = true;
4869 #endif
4870
4871         switch(statement->kind) {
4872         case STATEMENT_INVALID:
4873                 panic("invalid statement found");
4874                 return;
4875         case STATEMENT_EMPTY:
4876                 /* nothing */
4877                 return;
4878         case STATEMENT_COMPOUND:
4879                 compound_statement_to_firm(&statement->compound);
4880                 return;
4881         case STATEMENT_RETURN:
4882                 return_statement_to_firm(&statement->returns);
4883                 return;
4884         case STATEMENT_EXPRESSION:
4885                 expression_statement_to_firm(&statement->expression);
4886                 return;
4887         case STATEMENT_IF:
4888                 if_statement_to_firm(&statement->ifs);
4889                 return;
4890         case STATEMENT_WHILE:
4891                 while_statement_to_firm(&statement->whiles);
4892                 return;
4893         case STATEMENT_DO_WHILE:
4894                 do_while_statement_to_firm(&statement->do_while);
4895                 return;
4896         case STATEMENT_DECLARATION:
4897                 declaration_statement_to_firm(&statement->declaration);
4898                 return;
4899         case STATEMENT_BREAK:
4900                 create_jump_statement(statement, get_break_label());
4901                 return;
4902         case STATEMENT_CONTINUE:
4903                 create_jump_statement(statement, continue_label);
4904                 return;
4905         case STATEMENT_SWITCH:
4906                 switch_statement_to_firm(&statement->switchs);
4907                 return;
4908         case STATEMENT_CASE_LABEL:
4909                 case_label_to_firm(&statement->case_label);
4910                 return;
4911         case STATEMENT_FOR:
4912                 for_statement_to_firm(&statement->fors);
4913                 return;
4914         case STATEMENT_LABEL:
4915                 label_to_firm(&statement->label);
4916                 return;
4917         case STATEMENT_GOTO:
4918                 goto_to_firm(&statement->gotos);
4919                 return;
4920         case STATEMENT_ASM:
4921                 asm_statement_to_firm(&statement->asms);
4922                 return;
4923         case STATEMENT_MS_TRY:
4924                 ms_try_statement_to_firm(&statement->ms_try);
4925                 return;
4926         case STATEMENT_LEAVE:
4927                 leave_statement_to_firm(&statement->leave);
4928                 return;
4929         }
4930         panic("Statement not implemented\n");
4931 }
4932
4933 static int count_decls_in_expression(const expression_t *expression);
4934
4935 static int count_local_declarations(const declaration_t *      decl,
4936                                     const declaration_t *const end)
4937 {
4938         int count = 0;
4939         for (; decl != end; decl = decl->next) {
4940                 if (decl->namespc != NAMESPACE_NORMAL)
4941                         continue;
4942                 type_t *type = skip_typeref(decl->type);
4943
4944                 if (!decl->address_taken && is_type_scalar(type))
4945                         ++count;
4946                 const initializer_t *initializer = decl->init.initializer;
4947                 /* FIXME: should walk initializer hierarchies... */
4948                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4949                         count += count_decls_in_expression(initializer->value.value);
4950                 }
4951         }
4952         return count;
4953 }
4954
4955 static int count_decls_in_expression(const expression_t *expression) {
4956         int count = 0;
4957
4958         if (expression == NULL)
4959                 return 0;
4960
4961         switch((expression_kind_t) expression->base.kind) {
4962         case EXPR_STATEMENT:
4963                 return count_decls_in_stmts(expression->statement.statement);
4964         EXPR_BINARY_CASES {
4965                 int count_left  = count_decls_in_expression(expression->binary.left);
4966                 int count_right = count_decls_in_expression(expression->binary.right);
4967                 return count_left + count_right;
4968         }
4969         EXPR_UNARY_CASES
4970                 return count_decls_in_expression(expression->unary.value);
4971         case EXPR_CALL: {
4972                 call_argument_t *argument = expression->call.arguments;
4973                 for( ; argument != NULL; argument = argument->next) {
4974                         count += count_decls_in_expression(argument->expression);
4975                 }
4976                 return count;
4977         }
4978
4979         case EXPR_UNKNOWN:
4980         case EXPR_INVALID:
4981                 panic("unexpected expression kind");
4982
4983         case EXPR_COMPOUND_LITERAL:
4984                 /* TODO... */
4985                 break;
4986
4987         case EXPR_CONDITIONAL:
4988                 count += count_decls_in_expression(expression->conditional.condition);
4989                 count += count_decls_in_expression(expression->conditional.true_expression);
4990                 count += count_decls_in_expression(expression->conditional.false_expression);
4991                 return count;
4992
4993         case EXPR_BUILTIN_PREFETCH:
4994                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4995                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4996                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4997                 return count;
4998
4999         case EXPR_BUILTIN_CONSTANT_P:
5000                 count += count_decls_in_expression(expression->builtin_constant.value);
5001                 return count;
5002
5003         case EXPR_SELECT:
5004                 count += count_decls_in_expression(expression->select.compound);
5005                 return count;
5006
5007         case EXPR_ARRAY_ACCESS:
5008                 count += count_decls_in_expression(expression->array_access.array_ref);
5009                 count += count_decls_in_expression(expression->array_access.index);
5010                 return count;
5011
5012         case EXPR_CLASSIFY_TYPE:
5013                 count += count_decls_in_expression(expression->classify_type.type_expression);
5014                 return count;
5015
5016         case EXPR_SIZEOF:
5017         case EXPR_ALIGNOF: {
5018                 expression_t *tp_expression = expression->typeprop.tp_expression;
5019                 if (tp_expression != NULL) {
5020                         count += count_decls_in_expression(tp_expression);
5021                 }
5022                 return count;
5023         }
5024
5025         case EXPR_OFFSETOF:
5026         case EXPR_REFERENCE:
5027         case EXPR_CONST:
5028         case EXPR_CHARACTER_CONSTANT:
5029         case EXPR_WIDE_CHARACTER_CONSTANT:
5030         case EXPR_STRING_LITERAL:
5031         case EXPR_WIDE_STRING_LITERAL:
5032         case EXPR_FUNCNAME:
5033         case EXPR_BUILTIN_SYMBOL:
5034         case EXPR_VA_START:
5035         case EXPR_VA_ARG:
5036                 break;
5037         }
5038
5039         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5040          * (or implement all the missing expressions here/implement a walker)
5041          */
5042
5043         return 0;
5044 }
5045
5046 static int count_decls_in_stmts(const statement_t *stmt)
5047 {
5048         int count = 0;
5049         for (; stmt != NULL; stmt = stmt->base.next) {
5050                 switch (stmt->kind) {
5051                         case STATEMENT_EMPTY:
5052                                 break;
5053
5054                         case STATEMENT_DECLARATION: {
5055                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5056                                 count += count_local_declarations(decl_stmt->declarations_begin,
5057                                                                   decl_stmt->declarations_end->next);
5058                                 break;
5059                         }
5060
5061                         case STATEMENT_COMPOUND: {
5062                                 const compound_statement_t *const comp =
5063                                         &stmt->compound;
5064                                 count += count_decls_in_stmts(comp->statements);
5065                                 break;
5066                         }
5067
5068                         case STATEMENT_IF: {
5069                                 const if_statement_t *const if_stmt = &stmt->ifs;
5070                                 count += count_decls_in_expression(if_stmt->condition);
5071                                 count += count_decls_in_stmts(if_stmt->true_statement);
5072                                 count += count_decls_in_stmts(if_stmt->false_statement);
5073                                 break;
5074                         }
5075
5076                         case STATEMENT_SWITCH: {
5077                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5078                                 count += count_decls_in_expression(switch_stmt->expression);
5079                                 count += count_decls_in_stmts(switch_stmt->body);
5080                                 break;
5081                         }
5082
5083                         case STATEMENT_LABEL: {
5084                                 const label_statement_t *const label_stmt = &stmt->label;
5085                                 if (label_stmt->statement != NULL) {
5086                                         count += count_decls_in_stmts(label_stmt->statement);
5087                                 }
5088                                 break;
5089                         }
5090
5091                         case STATEMENT_WHILE: {
5092                                 const while_statement_t *const while_stmt = &stmt->whiles;
5093                                 count += count_decls_in_expression(while_stmt->condition);
5094                                 count += count_decls_in_stmts(while_stmt->body);
5095                                 break;
5096                         }
5097
5098                         case STATEMENT_DO_WHILE: {
5099                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5100                                 count += count_decls_in_expression(do_while_stmt->condition);
5101                                 count += count_decls_in_stmts(do_while_stmt->body);
5102                                 break;
5103                         }
5104
5105                         case STATEMENT_FOR: {
5106                                 const for_statement_t *const for_stmt = &stmt->fors;
5107                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5108                                 count += count_decls_in_expression(for_stmt->initialisation);
5109                                 count += count_decls_in_expression(for_stmt->condition);
5110                                 count += count_decls_in_expression(for_stmt->step);
5111                                 count += count_decls_in_stmts(for_stmt->body);
5112                                 break;
5113                         }
5114
5115                         case STATEMENT_CASE_LABEL: {
5116                                 const case_label_statement_t *label = &stmt->case_label;
5117                                 count += count_decls_in_expression(label->expression);
5118                                 if (label->statement != NULL) {
5119                                         count += count_decls_in_stmts(label->statement);
5120                                 }
5121                                 break;
5122                         }
5123
5124                         case STATEMENT_ASM:
5125                         case STATEMENT_BREAK:
5126                         case STATEMENT_CONTINUE:
5127                                 break;
5128
5129                         case STATEMENT_EXPRESSION: {
5130                                 const expression_statement_t *expr_stmt = &stmt->expression;
5131                                 count += count_decls_in_expression(expr_stmt->expression);
5132                                 break;
5133                         }
5134
5135                         case STATEMENT_GOTO:
5136                         case STATEMENT_LEAVE:
5137                         case STATEMENT_INVALID:
5138                                 break;
5139
5140                         case STATEMENT_RETURN: {
5141                                 const return_statement_t *ret_stmt = &stmt->returns;
5142                                 count += count_decls_in_expression(ret_stmt->value);
5143                                 break;
5144                         }
5145
5146                         case STATEMENT_MS_TRY: {
5147                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5148                                 count += count_decls_in_stmts(try_stmt->try_statement);
5149                                 if (try_stmt->except_expression != NULL)
5150                                         count += count_decls_in_expression(try_stmt->except_expression);
5151                                 count += count_decls_in_stmts(try_stmt->final_statement);
5152                                 break;
5153                         }
5154                 }
5155         }
5156         return count;
5157 }
5158
5159 static int get_function_n_local_vars(declaration_t *declaration)
5160 {
5161         int count = 0;
5162
5163         /* count parameters */
5164         count += count_local_declarations(declaration->scope.declarations, NULL);
5165
5166         /* count local variables declared in body */
5167         count += count_decls_in_stmts(declaration->init.statement);
5168
5169         return count;
5170 }
5171
5172 static void initialize_function_parameters(declaration_t *declaration)
5173 {
5174         ir_graph        *irg             = current_ir_graph;
5175         ir_node         *args            = get_irg_args(irg);
5176         ir_node         *start_block     = get_irg_start_block(irg);
5177         ir_type         *function_irtype = get_ir_type(declaration->type);
5178
5179         int            n         = 0;
5180         declaration_t *parameter = declaration->scope.declarations;
5181         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5182                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5183                 type_t *type = skip_typeref(parameter->type);
5184
5185                 bool needs_entity = parameter->address_taken;
5186                 assert(!is_type_array(type));
5187                 if (is_type_compound(type)) {
5188                         needs_entity = true;
5189                 }
5190
5191                 if (needs_entity) {
5192                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5193                         ident     *id     = new_id_from_str(parameter->symbol->string);
5194                         set_entity_ident(entity, id);
5195
5196                         parameter->declaration_kind
5197                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5198                         parameter->v.entity = entity;
5199                         continue;
5200                 }
5201
5202                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5203                 ir_mode *param_mode   = get_type_mode(param_irtype);
5204
5205                 long     pn    = n;
5206                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5207
5208                 ir_mode *mode = get_ir_mode(type);
5209                 value = create_conv(NULL, value, mode);
5210                 value = do_strict_conv(NULL, value);
5211
5212                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5213                 parameter->v.value_number   = next_value_number_function;
5214                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5215                 ++next_value_number_function;
5216
5217                 set_value(parameter->v.value_number, value);
5218         }
5219 }
5220
5221 /**
5222  * Handle additional decl modifiers for IR-graphs
5223  *
5224  * @param irg            the IR-graph
5225  * @param dec_modifiers  additional modifiers
5226  */
5227 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5228 {
5229         if (decl_modifiers & DM_NORETURN) {
5230                 /* TRUE if the declaration includes the Microsoft
5231                    __declspec(noreturn) specifier. */
5232                 set_irg_additional_property(irg, mtp_property_noreturn);
5233         }
5234         if (decl_modifiers & DM_NOTHROW) {
5235                 /* TRUE if the declaration includes the Microsoft
5236                    __declspec(nothrow) specifier. */
5237                 set_irg_additional_property(irg, mtp_property_nothrow);
5238         }
5239         if (decl_modifiers & DM_NAKED) {
5240                 /* TRUE if the declaration includes the Microsoft
5241                    __declspec(naked) specifier. */
5242                 set_irg_additional_property(irg, mtp_property_naked);
5243         }
5244         if (decl_modifiers & DM_FORCEINLINE) {
5245                 /* TRUE if the declaration includes the
5246                    Microsoft __forceinline specifier. */
5247                 set_irg_inline_property(irg, irg_inline_forced);
5248         }
5249         if (decl_modifiers & DM_NOINLINE) {
5250                 /* TRUE if the declaration includes the Microsoft
5251                    __declspec(noinline) specifier. */
5252                 set_irg_inline_property(irg, irg_inline_forbidden);
5253         }
5254 }
5255
5256 static void add_function_pointer(ir_type *segment, ir_entity *method,
5257                                  const char *unique_template)
5258 {
5259         ir_type   *method_type  = get_entity_type(method);
5260         ident     *id           = id_unique(unique_template);
5261         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5262
5263         ident     *ide          = id_unique(unique_template);
5264         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5265         ir_graph  *irg          = get_const_code_irg();
5266         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5267                                                            method, NULL);
5268
5269         set_entity_compiler_generated(ptr, 1);
5270         set_entity_variability(ptr, variability_constant);
5271         set_atomic_ent_value(ptr, val);
5272 }
5273
5274 /**
5275  * Create code for a function.
5276  */
5277 static void create_function(declaration_t *declaration)
5278 {
5279         ir_entity *function_entity = get_function_entity(declaration);
5280
5281         if (declaration->init.statement == NULL)
5282                 return;
5283
5284         if (declaration->modifiers & DM_CONSTRUCTOR) {
5285                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5286                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5287         }
5288         if (declaration->modifiers & DM_DESTRUCTOR) {
5289                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5290                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5291         }
5292
5293         current_function_decl = declaration;
5294         current_function_name = NULL;
5295         current_funcsig       = NULL;
5296
5297         assert(imature_blocks == NULL);
5298         imature_blocks = NEW_ARR_F(ir_node*, 0);
5299
5300         int       n_local_vars = get_function_n_local_vars(declaration);
5301         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5302
5303         set_irg_fp_model(irg, firm_opt.fp_model);
5304         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5305         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5306
5307         ir_node *first_block = get_cur_block();
5308
5309         /* set inline flags */
5310         if (declaration->is_inline)
5311                 set_irg_inline_property(irg, irg_inline_recomended);
5312         handle_decl_modifier_irg(irg, declaration->modifiers);
5313
5314         next_value_number_function = 0;
5315         initialize_function_parameters(declaration);
5316
5317         statement_to_firm(declaration->init.statement);
5318
5319         ir_node *end_block = get_irg_end_block(irg);
5320
5321         /* do we have a return statement yet? */
5322         if (get_cur_block() != NULL) {
5323                 type_t *type = skip_typeref(declaration->type);
5324                 assert(is_type_function(type));
5325                 const function_type_t *func_type   = &type->function;
5326                 const type_t          *return_type
5327                         = skip_typeref(func_type->return_type);
5328
5329                 ir_node *ret;
5330                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5331                         ret = new_Return(get_store(), 0, NULL);
5332                 } else {
5333                         ir_mode *mode;
5334                         if (is_type_scalar(return_type)) {
5335                                 mode = get_ir_mode(func_type->return_type);
5336                         } else {
5337                                 mode = mode_P_data;
5338                         }
5339
5340                         ir_node *in[1];
5341                         /* §5.1.2.2.3 main implicitly returns 0 */
5342                         if (strcmp(declaration->symbol->string, "main") == 0) {
5343                                 in[0] = new_Const(mode, get_mode_null(mode));
5344                         } else {
5345                                 in[0] = new_Unknown(mode);
5346                         }
5347                         ret = new_Return(get_store(), 1, in);
5348                 }
5349                 add_immBlock_pred(end_block, ret);
5350         }
5351
5352         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
5353                 mature_immBlock(imature_blocks[i]);
5354         }
5355         DEL_ARR_F(imature_blocks);
5356         imature_blocks = NULL;
5357
5358         mature_immBlock(first_block);
5359         mature_immBlock(end_block);
5360
5361         irg_finalize_cons(irg);
5362
5363         /* finalize the frame type */
5364         ir_type *frame_type = get_irg_frame_type(irg);
5365         int      n          = get_compound_n_members(frame_type);
5366         int      align_all  = 4;
5367         int      offset     = 0;
5368         for(int i = 0; i < n; ++i) {
5369                 ir_entity *entity      = get_compound_member(frame_type, i);
5370                 ir_type   *entity_type = get_entity_type(entity);
5371
5372                 int align = get_type_alignment_bytes(entity_type);
5373                 if (align > align_all)
5374                         align_all = align;
5375                 int misalign = 0;
5376                 if (align > 0) {
5377                         misalign  = offset % align;
5378                         if (misalign > 0) {
5379                                 offset += align - misalign;
5380                         }
5381                 }
5382
5383                 set_entity_offset(entity, offset);
5384                 offset += get_type_size_bytes(entity_type);
5385         }
5386         set_type_size_bytes(frame_type, offset);
5387         set_type_alignment_bytes(frame_type, align_all);
5388
5389         irg_vrfy(irg);
5390 }
5391
5392 static void scope_to_firm(scope_t *scope)
5393 {
5394         /* first pass: create declarations */
5395         declaration_t *declaration = scope->declarations;
5396         for( ; declaration != NULL; declaration = declaration->next) {
5397                 if (declaration->namespc != NAMESPACE_NORMAL)
5398                         continue;
5399                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5400                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5401                         continue;
5402                 if (declaration->symbol == NULL)
5403                         continue;
5404
5405                 type_t *type = skip_typeref(declaration->type);
5406                 if (is_type_function(type)) {
5407                         get_function_entity(declaration);
5408                 } else {
5409                         create_global_variable(declaration);
5410                 }
5411         }
5412
5413         /* second pass: create code/initializers */
5414         declaration = scope->declarations;
5415         for( ; declaration != NULL; declaration = declaration->next) {
5416                 if (declaration->namespc != NAMESPACE_NORMAL)
5417                         continue;
5418                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5419                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5420                         continue;
5421                 if (declaration->symbol == NULL)
5422                         continue;
5423
5424                 type_t *type = declaration->type;
5425                 if (type->kind == TYPE_FUNCTION) {
5426                         create_function(declaration);
5427                 } else {
5428                         assert(declaration->declaration_kind
5429                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5430                         current_ir_graph = get_const_code_irg();
5431                         create_declaration_initializer(declaration);
5432                 }
5433         }
5434 }
5435
5436 static void set_be_option(const char *option)
5437 {
5438         int res = firm_be_option(option);
5439         assert(res);
5440 }
5441
5442 void init_ast2firm(void)
5443 {
5444         obstack_init(&asm_obst);
5445         init_atomic_modes();
5446
5447         id_underscore = new_id_from_chars("_", 1);
5448         id_imp        = new_id_from_chars("__imp_", 6);
5449
5450         /* OS option must be set to the backend */
5451         switch (firm_opt.os_support) {
5452         case OS_SUPPORT_MINGW:
5453                 create_ld_ident = create_ld_ident_win32;
5454                 set_be_option("ia32-gasmode=mingw");
5455                 break;
5456         case OS_SUPPORT_LINUX:
5457                 create_ld_ident = create_ld_ident_linux_elf;
5458                 set_be_option("ia32-gasmode=elf");
5459                 break;
5460         case OS_SUPPORT_MACHO:
5461                 create_ld_ident = create_ld_ident_macho;
5462                 set_be_option("ia32-gasmode=macho");
5463                 set_be_option("ia32-stackalign=4");
5464                 set_be_option("pic");
5465                 break;
5466         }
5467
5468         /* create idents for all known runtime functions */
5469         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5470                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5471         }
5472
5473         entitymap_init(&entitymap);
5474 }
5475
5476 static void init_ir_types(void)
5477 {
5478         static int ir_types_initialized = 0;
5479         if (ir_types_initialized)
5480                 return;
5481         ir_types_initialized = 1;
5482
5483         ir_type_int        = get_ir_type(type_int);
5484         ir_type_const_char = get_ir_type(type_const_char);
5485         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5486         ir_type_void       = get_ir_type(type_void);
5487 }
5488
5489 void exit_ast2firm(void)
5490 {
5491         entitymap_destroy(&entitymap);
5492         obstack_free(&asm_obst, NULL);
5493 }
5494
5495 static void global_asm_to_firm(statement_t *s)
5496 {
5497         for (; s != NULL; s = s->base.next) {
5498                 assert(s->kind == STATEMENT_ASM);
5499
5500                 char const *const text = s->asms.asm_text.begin;
5501                 size_t            size = s->asms.asm_text.size;
5502
5503                 /* skip the last \0 */
5504                 if (text[size - 1] == '\0')
5505                         --size;
5506
5507                 ident *const id = new_id_from_chars(text, size);
5508                 add_irp_asm(id);
5509         }
5510 }
5511
5512 void translation_unit_to_firm(translation_unit_t *unit)
5513 {
5514         /* just to be sure */
5515         continue_label      = NULL;
5516         break_label         = NULL;
5517         current_switch_cond = NULL;
5518
5519         init_ir_types();
5520
5521         scope_to_firm(&unit->scope);
5522         global_asm_to_firm(unit->global_asm);
5523
5524         current_ir_graph = NULL;
5525 }