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
  29 #include "ast2firm.h"
  30
  31 #include "adt/error.h"
  32 #include "adt/array.h"
  33 #include "symbol_t.h"
  34 #include "token_t.h"
  35 #include "type_t.h"
  36 #include "ast_t.h"
  37 #include "parser.h"
  38 #include "diagnostic.h"
  39 #include "lang_features.h"
  40 #include "types.h"
  41 #include "driver/firm_opt.h"
  42 #include "driver/firm_cmdline.h"
  43
  44 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  45
  46 static ir_type *ir_type_const_char;
  47 static ir_type *ir_type_wchar_t;
  48 static ir_type *ir_type_void;
  49 static ir_type *ir_type_int;
  50
  51 static type_t *type_const_char;
  52
  53 static int       next_value_number_function;
  54 static ir_node  *continue_label;
  55 static ir_node  *break_label;
  56 static ir_node  *current_switch_cond;
  57 static bool      saw_default_label;
  58 static ir_node **imature_blocks;
  59
  60 static const declaration_t *current_function_decl;
  61 static ir_node             *current_function_name;
  62 static ir_node             *current_funcsig;
  63
  64 static struct obstack asm_obst;
  65
  66 typedef enum declaration_kind_t {
  67         DECLARATION_KIND_UNKNOWN,
  68         DECLARATION_KIND_FUNCTION,
  69         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  70         DECLARATION_KIND_GLOBAL_VARIABLE,
  71         DECLARATION_KIND_LOCAL_VARIABLE,
  72         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  73         DECLARATION_KIND_COMPOUND_MEMBER,
  74         DECLARATION_KIND_LABEL_BLOCK,
  75         DECLARATION_KIND_ENUM_ENTRY
  76 } declaration_kind_t;
  77
  78 static ir_type *get_ir_type(type_t *type);
  79 static int count_decls_in_stmts(const statement_t *stmt);
  80
  81 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  82 {
  83         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  84
  85         warningf(&declaration->source_position,
  86                  "variable '%#T' might be used uninitialized",
  87                  declaration->type, declaration->symbol);
  88         return new_r_Unknown(irg, mode);
  89 }
  90
  91 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  92 {
  93         const source_position_t *pos = (const source_position_t*) dbg;
  94         if(pos == NULL)
  95                 return 0;
  96         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  97                                    pos->linenr);
  98 }
  99
 100 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 101 {
 102         const source_position_t *pos = (const source_position_t*) dbg;
 103         if(pos == NULL)
 104                 return NULL;
 105         if(line != NULL)
 106                 *line = pos->linenr;
 107         return pos->input_name;
 108 }
 109
 110 static dbg_info *get_dbg_info(const source_position_t *pos)
 111 {
 112         return (dbg_info*) pos;
 113 }
 114
 115 static unsigned unique_id = 0;
 116
 117 static ident *unique_ident(const char *tag)
 118 {
 119         char buf[256];
 120
 121         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 122         unique_id++;
 123         return new_id_from_str(buf);
 124 }
 125
 126 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 127
 128 static ir_mode *mode_int, *mode_uint;
 129
 130 static ir_node *expression_to_firm(const expression_t *expression);
 131 static inline ir_mode *get_ir_mode(type_t *type);
 132
 133 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 134 {
 135         unsigned flags = get_atomic_type_flags(kind);
 136         unsigned size  = get_atomic_type_size(kind);
 137         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 138                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 139                 char            name[64];
 140                 mode_sort       sort;
 141                 unsigned        bit_size     = size * 8;
 142                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 143                 mode_arithmetic arithmetic;
 144                 unsigned        modulo_shift;
 145
 146                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 147                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 148                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 149                         sort         = irms_int_number;
 150                         arithmetic   = irma_twos_complement;
 151                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 152                 } else {
 153                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 154                         snprintf(name, sizeof(name), "f%d", bit_size);
 155                         sort         = irms_float_number;
 156                         arithmetic   = irma_ieee754;
 157                         modulo_shift = 0;
 158                 }
 159                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 160                                    modulo_shift);
 161         }
 162
 163         return NULL;
 164 }
 165
 166 /**
 167  * Initialises the atomic modes depending on the machine size.
 168  */
 169 static void init_atomic_modes(void)
 170 {
 171         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 172                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 173         }
 174         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 175         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 176
 177         /* there's no real void type in firm */
 178         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 179
 180         /* initialize pointer modes */
 181         char            name[64];
 182         mode_sort       sort         = irms_reference;
 183         unsigned        bit_size     = machine_size;
 184         bool            is_signed    = 0;
 185         mode_arithmetic arithmetic   = irma_twos_complement;
 186         unsigned        modulo_shift
 187                 = bit_size < machine_size ? machine_size : bit_size;
 188
 189         snprintf(name, sizeof(name), "p%d", machine_size);
 190         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 191                                         modulo_shift);
 192
 193         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 194         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 195
 196         /* Hmm, pointers should be machine size */
 197         set_modeP_data(ptr_mode);
 198         set_modeP_code(ptr_mode);
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type((type_t*) type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         assert(!type->is_vla);
 210         ir_type *irtype = get_ir_type((type_t*) type);
 211         return get_type_size_bytes(irtype);
 212 }
 213
 214
 215 static unsigned get_type_size_const(type_t *type)
 216 {
 217         type = skip_typeref(type);
 218
 219         switch(type->kind) {
 220         case TYPE_ERROR:
 221                 panic("error type occured");
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size(type->atomic.akind);
 224         case TYPE_COMPLEX:
 225                 return 2 * get_atomic_type_size(type->complex.akind);
 226         case TYPE_IMAGINARY:
 227                 return get_atomic_type_size(type->imaginary.akind);
 228         case TYPE_ENUM:
 229                 return get_mode_size_bytes(mode_int);
 230         case TYPE_COMPOUND_UNION:
 231         case TYPE_COMPOUND_STRUCT:
 232                 return get_compound_type_size(&type->compound);
 233         case TYPE_FUNCTION:
 234                 /* just a pointer to the function */
 235                 return get_mode_size_bytes(mode_P_code);
 236         case TYPE_POINTER:
 237                 return get_mode_size_bytes(mode_P_data);
 238         case TYPE_ARRAY:
 239                 return get_array_type_size(&type->array);
 240         case TYPE_BUILTIN:
 241                 return get_type_size_const(type->builtin.real_type);
 242         case TYPE_BITFIELD:
 243                 panic("type size of bitfield request");
 244         case TYPE_TYPEDEF:
 245         case TYPE_TYPEOF:
 246         case TYPE_INVALID:
 247                 break;
 248         }
 249         panic("Trying to determine size of invalid type");
 250 }
 251
 252 static ir_node *get_type_size(type_t *type)
 253 {
 254         type = skip_typeref(type);
 255
 256         if(is_type_array(type) && type->array.is_vla) {
 257                 ir_node *size_node = type->array.size_node;
 258                 if(size_node == NULL) {
 259                         size_node = expression_to_firm(type->array.size_expression);
 260                         assert(!is_Const(size_node));
 261                         type->array.size_node = size_node;
 262                 }
 263
 264                 ir_node *elem_size = get_type_size(type->array.element_type);
 265                 ir_mode *mode      = get_irn_mode(size_node);
 266                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 267                 return real_size;
 268         }
 269
 270         ir_mode *mode = get_ir_mode(type_size_t);
 271         symconst_symbol sym;
 272         sym.type_p = get_ir_type(type);
 273         return new_SymConst(mode, sym, symconst_type_size);
 274 }
 275
 276 static unsigned count_parameters(const function_type_t *function_type)
 277 {
 278         unsigned count = 0;
 279
 280         function_parameter_t *parameter = function_type->parameters;
 281         for ( ; parameter != NULL; parameter = parameter->next) {
 282                 ++count;
 283         }
 284
 285         return count;
 286 }
 287
 288 /**
 289  * Creates a Firm type for an atomic type
 290  */
 291 static ir_type *create_atomic_type(const atomic_type_t *type)
 292 {
 293         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 294         atomic_type_kind_t  kind      = type->akind;
 295         ir_mode            *mode      = _atomic_modes[kind];
 296         ident              *id        = get_mode_ident(mode);
 297         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 298
 299         set_type_alignment_bytes(irtype, type->base.alignment);
 300
 301         return irtype;
 302 }
 303
 304 /**
 305  * Creates a Firm type for a complex type
 306  */
 307 static ir_type *create_complex_type(const complex_type_t *type)
 308 {
 309         /*
 310         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 311         atomic_type_kind_t  kind      = type->akind;
 312         ir_mode            *mode      = _atomic_modes[kind];
 313         ident              *id        = get_mode_ident(mode);
 314         */
 315         (void)type;
 316
 317         /* FIXME: finish the array */
 318         return NULL;
 319 }
 320
 321 /**
 322  * Creates a Firm type for an imaginary type
 323  */
 324 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 325 {
 326         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 327         atomic_type_kind_t  kind      = type->akind;
 328         ir_mode            *mode      = _atomic_modes[kind];
 329         ident              *id        = get_mode_ident(mode);
 330         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 331
 332         set_type_alignment_bytes(irtype, type->base.alignment);
 333
 334         return irtype;
 335 }
 336
 337 static ir_type *create_method_type(const function_type_t *function_type)
 338 {
 339         type_t  *return_type  = function_type->return_type;
 340
 341         ident   *id           = unique_ident("functiontype");
 342         int      n_parameters = count_parameters(function_type);
 343         int      n_results    = return_type == type_void ? 0 : 1;
 344         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 345         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 346
 347         if(return_type != type_void) {
 348                 ir_type *restype = get_ir_type(return_type);
 349                 set_method_res_type(irtype, 0, restype);
 350         }
 351
 352         function_parameter_t *parameter = function_type->parameters;
 353         int                   n         = 0;
 354         for( ; parameter != NULL; parameter = parameter->next) {
 355                 ir_type *p_irtype = get_ir_type(parameter->type);
 356                 set_method_param_type(irtype, n, p_irtype);
 357                 ++n;
 358         }
 359
 360         if(function_type->variadic || function_type->unspecified_parameters) {
 361                 set_method_variadicity(irtype, variadicity_variadic);
 362         }
 363
 364         return irtype;
 365 }
 366
 367 static ir_type *create_pointer_type(pointer_type_t *type)
 368 {
 369         type_t  *points_to = type->points_to;
 370         ir_type *ir_points_to;
 371         /* Avoid endless recursion if the points_to type contains this poiner type
 372          * again (might be a struct). We therefore first create a void* pointer
 373          * and then set the real points_to type
 374          */
 375         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 376         ir_type  *ir_type = new_d_type_pointer(unique_ident("pointer"),
 377                                             ir_type_void, mode_P_data, dbgi);
 378         type->base.firm_type  = ir_type;
 379
 380         ir_points_to = get_ir_type(points_to);
 381         set_pointer_points_to_type(ir_type, ir_points_to);
 382
 383         return ir_type;
 384 }
 385
 386 static ir_type *create_array_type(array_type_t *type)
 387 {
 388         type_t  *element_type    = type->element_type;
 389         ir_type *ir_element_type = get_ir_type(element_type);
 390
 391         ident    *id      = unique_ident("array");
 392         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 393         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 394
 395         const int align = get_type_alignment_bytes(ir_element_type);
 396         set_type_alignment_bytes(ir_type, align);
 397
 398         if(type->size_constant) {
 399                 int n_elements = type->size;
 400
 401                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 402
 403                 size_t elemsize = get_type_size_bytes(ir_element_type);
 404                 if(elemsize % align > 0) {
 405                         elemsize += align - (elemsize % align);
 406                 }
 407                 set_type_size_bytes(ir_type, n_elements * elemsize);
 408         } else {
 409                 set_array_lower_bound_int(ir_type, 0, 0);
 410         }
 411         set_type_state(ir_type, layout_fixed);
 412
 413         return ir_type;
 414 }
 415
 416 /**
 417  * Return the signed integer type of size bits.
 418  *
 419  * @param size   the size
 420  */
 421 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 422                                                  unsigned size)
 423 {
 424         static ir_mode *s_modes[64 + 1] = {NULL, };
 425         ir_type *res;
 426         ir_mode *mode;
 427
 428         if (size <= 0 || size > 64)
 429                 return NULL;
 430
 431         mode = s_modes[size];
 432         if (mode == NULL) {
 433                 char name[32];
 434
 435                 snprintf(name, sizeof(name), "bf_I%u", size);
 436                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 437                                    size <= 32 ? 32 : size );
 438                 s_modes[size] = mode;
 439         }
 440
 441         char name[32];
 442         snprintf(name, sizeof(name), "I%u", size);
 443         ident *id = new_id_from_str(name);
 444         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 445         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 446         set_primitive_base_type(res, base_tp);
 447
 448         return res;
 449 }
 450
 451 /**
 452  * Return the unsigned integer type of size bits.
 453  *
 454  * @param size   the size
 455  */
 456 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 457                                                    unsigned size)
 458 {
 459         static ir_mode *u_modes[64 + 1] = {NULL, };
 460         ir_type *res;
 461         ir_mode *mode;
 462
 463         if (size <= 0 || size > 64)
 464                 return NULL;
 465
 466         mode = u_modes[size];
 467         if (mode == NULL) {
 468                 char name[32];
 469
 470                 snprintf(name, sizeof(name), "bf_U%u", size);
 471                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 472                                    size <= 32 ? 32 : size );
 473                 u_modes[size] = mode;
 474         }
 475
 476         char name[32];
 477
 478         snprintf(name, sizeof(name), "U%u", size);
 479         ident *id = new_id_from_str(name);
 480         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 481         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 482         set_primitive_base_type(res, base_tp);
 483
 484         return res;
 485 }
 486
 487 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 488 {
 489         type_t *base = skip_typeref(type->base_type);
 490         assert(base->kind == TYPE_ATOMIC);
 491         ir_type *irbase = get_ir_type(base);
 492
 493         unsigned size = fold_constant(type->size);
 494
 495         assert(!is_type_float(base));
 496         if(is_type_signed(base)) {
 497                 return get_signed_int_type_for_bit_size(irbase, size);
 498         } else {
 499                 return get_unsigned_int_type_for_bit_size(irbase, size);
 500         }
 501 }
 502
 503 #define INVALID_TYPE ((ir_type_ptr)-1)
 504
 505 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 506                                   size_t *outer_offset, size_t *outer_align);
 507
 508 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
 509                                    size_t *outer_offset, size_t *outer_align)
 510 {
 511         declaration_t *declaration = type->declaration;
 512         if(declaration->v.irtype != NULL) {
 513                 return declaration->v.irtype;
 514         }
 515
 516         size_t align_all  = 1;
 517         size_t offset     = 0;
 518         size_t bit_offset = 0;
 519         if(irtype == NULL) {
 520                 symbol_t *symbol = declaration->symbol;
 521                 ident    *id;
 522                 if(symbol != NULL) {
 523                         id = unique_ident(symbol->string);
 524                 } else {
 525                         id = unique_ident("__anonymous_struct");
 526                 }
 527                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 528
 529                 irtype = new_d_type_struct(id, dbgi);
 530
 531                 declaration->v.irtype = irtype;
 532                 type->base.firm_type  = irtype;
 533         } else {
 534                 offset    = *outer_offset;
 535                 align_all = *outer_align;
 536         }
 537
 538         declaration_t *entry = declaration->scope.declarations;
 539         for( ; entry != NULL; entry = entry->next) {
 540                 if(entry->namespc != NAMESPACE_NORMAL)
 541                         continue;
 542
 543                 symbol_t *symbol     = entry->symbol;
 544                 type_t   *entry_type = skip_typeref(entry->type);
 545                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 546                 ident    *ident;
 547                 if(symbol != NULL) {
 548                         ident = new_id_from_str(symbol->string);
 549                 } else {
 550                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 551                                 create_struct_type(&entry_type->compound, irtype, &offset,
 552                                                    &align_all);
 553                                 continue;
 554                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 555                                 create_union_type(&entry_type->compound, irtype, &offset,
 556                                                   &align_all);
 557                                 continue;
 558                         } else {
 559                                 assert(entry_type->kind == TYPE_BITFIELD);
 560                         }
 561                         ident = unique_ident("anon");
 562                 }
 563
 564                 ir_type *base_irtype;
 565                 if(entry_type->kind == TYPE_BITFIELD) {
 566                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 567                 } else {
 568                         base_irtype = get_ir_type(entry_type);
 569                 }
 570
 571                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 572                 size_t misalign        = offset % entry_alignment;
 573
 574                 ir_type   *entry_irtype = get_ir_type(entry_type);
 575                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 576
 577                 size_t base;
 578                 size_t bits_remainder;
 579                 if(entry_type->kind == TYPE_BITFIELD) {
 580                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 581                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 582
 583                         if(size_bits > rest_size_bits) {
 584                                 /* start a new bucket */
 585                                 offset     += entry_alignment - misalign;
 586                                 bit_offset  = 0;
 587
 588                                 base           = offset;
 589                                 bits_remainder = 0;
 590                         } else {
 591                                 /* put into current bucket */
 592                                 base           = offset - misalign;
 593                                 bits_remainder = misalign * 8 + bit_offset;
 594                         }
 595
 596                         offset     += size_bits / 8;
 597                         bit_offset  = bit_offset + (size_bits % 8);
 598                 } else {
 599                         size_t entry_size = get_type_size_bytes(base_irtype);
 600                         if(misalign > 0 || bit_offset > 0)
 601                                 offset += entry_alignment - misalign;
 602
 603                         base           = offset;
 604                         bits_remainder = 0;
 605                         offset        += entry_size;
 606                         bit_offset     = 0;
 607                 }
 608
 609                 if(entry_alignment > align_all) {
 610                         if(entry_alignment % align_all != 0) {
 611                                 panic("uneven alignments not supported yet");
 612                         }
 613                         align_all = entry_alignment;
 614                 }
 615
 616                 set_entity_offset(entity, base);
 617                 set_entity_offset_bits_remainder(entity,
 618                                                  (unsigned char) bits_remainder);
 619                 //add_struct_member(irtype, entity);
 620                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 621                 assert(entry->v.entity == NULL);
 622                 entry->v.entity         = entity;
 623         }
 624
 625         size_t misalign = offset % align_all;
 626         if(misalign > 0 || bit_offset > 0) {
 627                 offset += align_all - misalign;
 628         }
 629
 630         if(outer_offset != NULL) {
 631                 *outer_offset = offset;
 632                 *outer_align  = align_all;
 633         } else {
 634                 set_type_alignment_bytes(irtype, align_all);
 635                 set_type_size_bytes(irtype, offset);
 636                 set_type_state(irtype, layout_fixed);
 637         }
 638
 639         return irtype;
 640 }
 641
 642 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 643                                   size_t *outer_offset, size_t *outer_align)
 644 {
 645         declaration_t *declaration = type->declaration;
 646         if(declaration->v.irtype != NULL) {
 647                 return declaration->v.irtype;
 648         }
 649
 650         size_t align_all = 1;
 651         size_t offset    = 0;
 652         size_t size      = 0;
 653
 654         if(irtype == NULL) {
 655                 symbol_t      *symbol      = declaration->symbol;
 656                 ident         *id;
 657                 if(symbol != NULL) {
 658                         id = unique_ident(symbol->string);
 659                 } else {
 660                         id = unique_ident("__anonymous_union");
 661                 }
 662                 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
 663
 664                 irtype = new_d_type_union(id, dbgi);
 665
 666                 declaration->v.irtype = irtype;
 667                 type->base.firm_type  = irtype;
 668         } else {
 669                 offset    = *outer_offset;
 670                 align_all = *outer_align;
 671         }
 672
 673         type->base.firm_type = irtype;
 674
 675         declaration_t *entry = declaration->scope.declarations;
 676         for( ; entry != NULL; entry = entry->next) {
 677                 if(entry->namespc != NAMESPACE_NORMAL)
 678                         continue;
 679
 680                 symbol_t *symbol        = entry->symbol;
 681                 type_t   *entry_type    = skip_typeref(entry->type);
 682                 ir_type  *entry_ir_type = get_ir_type(entry_type);
 683
 684                 ident *ident;
 685                 if(symbol != NULL) {
 686                         ident = new_id_from_str(entry->symbol->string);
 687                 } else {
 688                         size_t offs = offset;
 689                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 690                                 create_struct_type(&entry_type->compound, irtype, &offs,
 691                                                    &align_all);
 692                                 continue;
 693                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 694                                 create_union_type(&entry_type->compound, irtype, &offs,
 695                                                   &align_all);
 696                                 continue;
 697                         } else {
 698                                 panic("anonymous union member must be struct or union");
 699                         }
 700                         size_t entry_size = offs - offset;
 701                         if(entry_size > size) {
 702                                 size = entry_size;
 703                         }
 704                         ident = unique_ident("anon");
 705                 }
 706
 707                 size_t entry_size      = get_type_size_bytes(entry_ir_type);
 708                 size_t entry_alignment = get_type_alignment_bytes(entry_ir_type);
 709
 710                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 711                 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
 712                                                        dbgi);
 713                 //add_union_member(irtype, entity);
 714                 set_entity_offset(entity, 0);
 715                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 716                 assert(entry->v.entity == NULL);
 717                 entry->v.entity         = entity;
 718
 719                 if(entry_size > size) {
 720                         size = entry_size;
 721                 }
 722                 if(entry_alignment > align_all) {
 723                         if(entry_alignment % align_all != 0) {
 724                                 panic("Uneven alignments not supported yet");
 725                         }
 726                         align_all = entry_alignment;
 727                 }
 728         }
 729
 730         if(outer_offset != NULL) {
 731                 assert(*outer_offset == offset);
 732
 733                 size_t misalign = offset % align_all;
 734                 if (misalign != 0)
 735                         size += align_all - misalign;
 736                 *outer_offset += size;
 737
 738                 if(align_all > *outer_align) {
 739                         if(align_all % *outer_align != 0) {
 740                                 panic("uneven alignments not supported yet");
 741                         }
 742                         *outer_align = align_all;
 743                 }
 744         } else {
 745                 set_type_alignment_bytes(irtype, align_all);
 746                 set_type_size_bytes(irtype, size);
 747                 set_type_state(irtype, layout_fixed);
 748                 declaration->v.irtype = irtype;
 749         }
 750
 751         return irtype;
 752 }
 753
 754 static ir_type *create_enum_type(enum_type_t *const type)
 755 {
 756         type->base.firm_type = ir_type_int;
 757
 758         ir_mode *const mode    = mode_int;
 759         tarval  *const one     = get_mode_one(mode);
 760         tarval  *      tv_next = get_tarval_null(mode);
 761
 762         declaration_t *declaration = type->declaration->next;
 763         for (; declaration != NULL; declaration = declaration->next) {
 764                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 765                         break;
 766
 767                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 768
 769                 expression_t *const init = declaration->init.enum_value;
 770                 if (init != NULL) {
 771                         ir_node *const cnst = expression_to_firm(init);
 772                         if (!is_Const(cnst)) {
 773                                 panic("couldn't fold constant");
 774                         }
 775                         tv_next = get_Const_tarval(cnst);
 776                 }
 777                 declaration->v.enum_val = tv_next;
 778                 tv_next = tarval_add(tv_next, one);
 779         }
 780
 781         return ir_type_int;
 782 }
 783
 784 static ir_type *get_ir_type(type_t *type)
 785 {
 786         assert(type != NULL);
 787
 788         type = skip_typeref(type);
 789
 790         if(type->base.firm_type != NULL) {
 791                 assert(type->base.firm_type != INVALID_TYPE);
 792                 return type->base.firm_type;
 793         }
 794
 795         ir_type *firm_type = NULL;
 796         switch(type->kind) {
 797         case TYPE_ERROR:
 798                 panic("error type occurred");
 799         case TYPE_ATOMIC:
 800                 firm_type = create_atomic_type(&type->atomic);
 801                 break;
 802         case TYPE_COMPLEX:
 803                 firm_type = create_complex_type(&type->complex);
 804                 break;
 805         case TYPE_IMAGINARY:
 806                 firm_type = create_imaginary_type(&type->imaginary);
 807                 break;
 808         case TYPE_FUNCTION:
 809                 firm_type = create_method_type(&type->function);
 810                 break;
 811         case TYPE_POINTER:
 812                 firm_type = create_pointer_type(&type->pointer);
 813                 break;
 814         case TYPE_ARRAY:
 815                 firm_type = create_array_type(&type->array);
 816                 break;
 817         case TYPE_COMPOUND_STRUCT:
 818                 firm_type = create_struct_type(&type->compound, NULL, NULL, NULL);
 819                 break;
 820         case TYPE_COMPOUND_UNION:
 821                 firm_type = create_union_type(&type->compound, NULL, NULL, NULL);
 822                 break;
 823         case TYPE_ENUM:
 824                 firm_type = create_enum_type(&type->enumt);
 825                 break;
 826         case TYPE_BUILTIN:
 827                 firm_type = get_ir_type(type->builtin.real_type);
 828                 break;
 829         case TYPE_BITFIELD:
 830                 firm_type = create_bitfield_type(&type->bitfield);
 831                 break;
 832
 833         case TYPE_TYPEOF:
 834         case TYPE_TYPEDEF:
 835         case TYPE_INVALID:
 836                 break;
 837         }
 838         if(firm_type == NULL)
 839                 panic("unknown type found");
 840
 841         type->base.firm_type = firm_type;
 842         return firm_type;
 843 }
 844
 845 static inline ir_mode *get_ir_mode(type_t *type)
 846 {
 847         ir_type *irtype = get_ir_type(type);
 848
 849         /* firm doesn't report a mode for arrays somehow... */
 850         if(is_Array_type(irtype)) {
 851                 return mode_P_data;
 852         }
 853
 854         ir_mode *mode = get_type_mode(irtype);
 855         assert(mode != NULL);
 856         return mode;
 857 }
 858
 859 static ident *predef_idents[rts_max];
 860
 861 /** Names of the runtime functions. */
 862 static const struct {
 863         int        id;           /**< the rts id */
 864         int        n_res;        /**< number of return values */
 865         const char *name;        /**< the name of the rts function */
 866         int        n_params;     /**< number of parameters */
 867         unsigned   flags;        /**< language flags */
 868 } rts_data[] = {
 869         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 870         { rts_abort,      0, "abort",        0, _C89 },
 871         { rts_abs,        1, "abs",          1, _C89 },
 872         { rts_labs,       1, "labs",         1, _C89 },
 873         { rts_llabs,      1, "llabs",        1, _C99 },
 874         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 875
 876         { rts_fabs,       1, "fabs",         1, _C89 },
 877         { rts_sqrt,       1, "sqrt",         1, _C89 },
 878         { rts_cbrt,       1, "cbrt",         1, _C99 },
 879         { rts_exp,        1, "exp",          1, _C89 },
 880         { rts_exp2,       1, "exp2",         1, _C89 },
 881         { rts_exp10,      1, "exp10",        1, _GNUC },
 882         { rts_log,        1, "log",          1, _C89 },
 883         { rts_log2,       1, "log2",         1, _C89 },
 884         { rts_log10,      1, "log10",        1, _C89 },
 885         { rts_pow,        1, "pow",          2, _C89 },
 886         { rts_sin,        1, "sin",          1, _C89 },
 887         { rts_cos,        1, "cos",          1, _C89 },
 888         { rts_tan,        1, "tan",          1, _C89 },
 889         { rts_asin,       1, "asin",         1, _C89 },
 890         { rts_acos,       1, "acos",         1, _C89 },
 891         { rts_atan,       1, "atan",         1, _C89 },
 892         { rts_sinh,       1, "sinh",         1, _C89 },
 893         { rts_cosh,       1, "cosh",         1, _C89 },
 894         { rts_tanh,       1, "tanh",         1, _C89 },
 895
 896         { rts_fabsf,      1, "fabsf",        1, _C99 },
 897         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 898         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 899         { rts_expf,       1, "expf",         1, _C99 },
 900         { rts_exp2f,      1, "exp2f",        1, _C99 },
 901         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 902         { rts_logf,       1, "logf",         1, _C99 },
 903         { rts_log2f,      1, "log2f",        1, _C99 },
 904         { rts_log10f,     1, "log10f",       1, _C99 },
 905         { rts_powf,       1, "powf",         2, _C99 },
 906         { rts_sinf,       1, "sinf",         1, _C99 },
 907         { rts_cosf,       1, "cosf",         1, _C99 },
 908         { rts_tanf,       1, "tanf",         1, _C99 },
 909         { rts_asinf,      1, "asinf",        1, _C99 },
 910         { rts_acosf,      1, "acosf",        1, _C99 },
 911         { rts_atanf,      1, "atanf",        1, _C99 },
 912         { rts_sinhf,      1, "sinhf",        1, _C99 },
 913         { rts_coshf,      1, "coshf",        1, _C99 },
 914         { rts_tanhf,      1, "tanhf",        1, _C99 },
 915
 916         { rts_fabsl,      1, "fabsl",        1, _C99 },
 917         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 918         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 919         { rts_expl,       1, "expl",         1, _C99 },
 920         { rts_exp2l,      1, "exp2l",        1, _C99 },
 921         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 922         { rts_logl,       1, "logl",         1, _C99 },
 923         { rts_log2l,      1, "log2l",        1, _C99 },
 924         { rts_log10l,     1, "log10l",       1, _C99 },
 925         { rts_powl,       1, "powl",         2, _C99 },
 926         { rts_sinl,       1, "sinl",         1, _C99 },
 927         { rts_cosl,       1, "cosl",         1, _C99 },
 928         { rts_tanl,       1, "tanl",         1, _C99 },
 929         { rts_asinl,      1, "asinl",        1, _C99 },
 930         { rts_acosl,      1, "acosl",        1, _C99 },
 931         { rts_atanl,      1, "atanl",        1, _C99 },
 932         { rts_sinhl,      1, "sinhl",        1, _C99 },
 933         { rts_coshl,      1, "coshl",        1, _C99 },
 934         { rts_tanhl,      1, "tanhl",        1, _C99 },
 935
 936         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 937         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 938         { rts_strcmp,     1, "strcmp",       2, _C89 },
 939         { rts_strncmp,    1, "strncmp",      3, _C89 }
 940 };
 941
 942 /**
 943  * Mangles an entity linker (ld) name for win32 usage.
 944  *
 945  * @param ent             the entity to be mangled
 946  * @param decl_modifiers  the set of modifiers for this entity
 947  */
 948 static ir_ident_ptr decorate_win32(ir_entity_ptr ent, decl_modifiers_t decl_modifiers) {
 949         ir_ident_ptr id;
 950
 951         if (is_Method_type(get_entity_type(ent)))
 952                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 953         else {
 954                 /* always add an underscore in win32 */
 955                 id = mangle(new_id_from_chars("_", 1), get_entity_ident(ent));
 956         }
 957
 958         if (decl_modifiers & DM_DLLIMPORT) {
 959                 /* add prefix for imported symbols */
 960                 id = mangle(new_id_from_chars("__imp_", 6), id);
 961         }
 962         return id;
 963 }
 964
 965 /**
 966  * Mangles an entity linker (ld) name from a declaration.
 967  *
 968  * @param ent             the entity to be mangled
 969  * @param declaration     the declaration
 970  */
 971 static void mangle_ent_from_decl(ir_entity *ent, declaration_t *declaration)
 972 {
 973         ident *id;
 974
 975         if (firm_opt.os_support == OS_SUPPORT_MINGW)
 976                 id = decorate_win32(ent, declaration->decl_modifiers);
 977         else
 978                 id = get_entity_ident(ent);
 979
 980         set_entity_ld_ident(ent, id);
 981 }
 982
 983 static ir_entity* get_function_entity(declaration_t *declaration)
 984 {
 985         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 986                 return declaration->v.entity;
 987         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 988
 989         symbol_t *symbol = declaration->symbol;
 990         ident    *id     = new_id_from_str(symbol->string);
 991
 992         ir_type  *global_type    = get_glob_type();
 993         ir_type  *ir_type_method = get_ir_type(declaration->type);
 994         assert(is_Method_type(ir_type_method));
 995
 996         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 997         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 998         mangle_ent_from_decl(entity, declaration);
 999         if(declaration->storage_class == STORAGE_CLASS_STATIC
1000                         || declaration->is_inline) {
1001                 set_entity_visibility(entity, visibility_local);
1002         } else if(declaration->init.statement != NULL) {
1003                 set_entity_visibility(entity, visibility_external_visible);
1004         } else {
1005                 set_entity_visibility(entity, visibility_external_allocated);
1006
1007                 /* We should check for file scope here, but as long as we compile C only
1008                    this is not needed. */
1009                 int    n_params = get_method_n_params(ir_type_method);
1010                 int    n_res    = get_method_n_ress(ir_type_method);
1011                 int    i;
1012
1013                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
1014                         /* found abort(), store for later */
1015                         //abort_ent = ent;
1016                         //abort_tp  = ftype;
1017                 } else {
1018                         if (! firm_opt.freestanding) {
1019                                 /* check for a known runtime function */
1020                                 for (i = 0; i < rts_max; ++i) {
1021                                         /* ignore those rts functions not necessary needed for current mode */
1022                                         if ((c_mode & rts_data[i].flags) == 0)
1023                                                 continue;
1024                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1025                                                 id == predef_idents[rts_data[i].id])
1026                                                 rts_entities[rts_data[i].id] = entity;
1027                                 }
1028                         }
1029                 }
1030         }
1031         set_entity_allocation(entity, allocation_static);
1032
1033         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1034         declaration->v.entity         = entity;
1035
1036         return entity;
1037 }
1038
1039 static ir_node *const_to_firm(const const_expression_t *cnst)
1040 {
1041         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1042         ir_mode  *mode = get_ir_mode(cnst->base.type);
1043
1044         char    buf[128];
1045         tarval *tv;
1046         size_t  len;
1047         if(mode_is_float(mode)) {
1048                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1049         } else {
1050                 if(mode_is_signed(mode)) {
1051                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1052                 } else {
1053                         len = snprintf(buf, sizeof(buf), "%llu",
1054                                        (unsigned long long) cnst->v.int_value);
1055                 }
1056                 tv = new_tarval_from_str(buf, len, mode);
1057         }
1058
1059         return new_d_Const(dbgi, mode, tv);
1060 }
1061
1062 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1063 {
1064         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1065         ir_mode  *mode = get_ir_mode(cnst->base.type);
1066
1067         long long int v = 0;
1068         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1069                 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1070         }
1071         char    buf[128];
1072         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1073         tarval *tv = new_tarval_from_str(buf, len, mode);
1074
1075         return new_d_Const(dbgi, mode, tv);
1076 }
1077
1078 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1079 {
1080         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1081         ir_mode  *mode = get_ir_mode(cnst->base.type);
1082
1083         long long int v = cnst->v.wide_character.begin[0];
1084
1085         char    buf[128];
1086         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1087         tarval *tv = new_tarval_from_str(buf, len, mode);
1088
1089         return new_d_Const(dbgi, mode, tv);
1090 }
1091
1092 static ir_node *create_global(dbg_info *dbgi, ir_mode *mode,
1093                               ir_entity *entity)
1094 {
1095         assert(entity != NULL);
1096         symconst_symbol sym;
1097         sym.entity_p = entity;
1098         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1099 }
1100
1101 static ir_node *string_to_firm(const source_position_t *const src_pos,
1102                                const char *const id_prefix,
1103                                const string_t *const value)
1104 {
1105         ir_type  *const global_type = get_glob_type();
1106         dbg_info *const dbgi        = get_dbg_info(src_pos);
1107         ir_type  *const type        = new_d_type_array(unique_ident("strtype"), 1,
1108                                                        ir_type_const_char, dbgi);
1109
1110         ident     *const id     = unique_ident(id_prefix);
1111         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1112         set_entity_ld_ident(entity, id);
1113         set_entity_variability(entity, variability_constant);
1114         set_entity_allocation(entity, allocation_static);
1115
1116         ir_type *const elem_type = ir_type_const_char;
1117         ir_mode *const mode      = get_type_mode(elem_type);
1118
1119         const char* const string = value->begin;
1120         const size_t      slen   = value->size;
1121
1122         set_array_lower_bound_int(type, 0, 0);
1123         set_array_upper_bound_int(type, 0, slen);
1124         set_type_size_bytes(type, slen);
1125         set_type_state(type, layout_fixed);
1126
1127         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1128         for(size_t i = 0; i < slen; ++i) {
1129                 tvs[i] = new_tarval_from_long(string[i], mode);
1130         }
1131
1132         set_array_entity_values(entity, tvs, slen);
1133         free(tvs);
1134
1135         return create_global(dbgi, mode_P_data, entity);
1136 }
1137
1138 static ir_node *string_literal_to_firm(
1139                 const string_literal_expression_t* literal)
1140 {
1141         return string_to_firm(&literal->base.source_position, "Lstr",
1142                               &literal->value);
1143 }
1144
1145 static ir_node *wide_string_literal_to_firm(
1146         const wide_string_literal_expression_t* const literal)
1147 {
1148         ir_type *const global_type = get_glob_type();
1149         ir_type *const elem_type   = ir_type_wchar_t;
1150         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1151         ir_type *const type        = new_d_type_array(unique_ident("strtype"), 1,
1152                                                     elem_type, dbgi);
1153
1154         ident     *const id     = unique_ident("Lstr");
1155         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1156         set_entity_ld_ident(entity, id);
1157         set_entity_variability(entity, variability_constant);
1158         set_entity_allocation(entity, allocation_static);
1159
1160         ir_mode *const mode      = get_type_mode(elem_type);
1161
1162         const wchar_rep_t *const string = literal->value.begin;
1163         const size_t             slen   = literal->value.size;
1164
1165         set_array_lower_bound_int(type, 0, 0);
1166         set_array_upper_bound_int(type, 0, slen);
1167         set_type_size_bytes(type, slen);
1168         set_type_state(type, layout_fixed);
1169
1170         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1171         for(size_t i = 0; i < slen; ++i) {
1172                 tvs[i] = new_tarval_from_long(string[i], mode);
1173         }
1174
1175         set_array_entity_values(entity, tvs, slen);
1176         free(tvs);
1177
1178         return create_global(dbgi, mode_P_data, entity);
1179 }
1180
1181 static ir_node *deref_address(type_t *const type, ir_node *const addr,
1182                               dbg_info *const dbgi)
1183 {
1184         ir_type *irtype = get_ir_type(type);
1185         if (is_compound_type(irtype)
1186                         || is_Method_type(irtype)
1187                         || is_Array_type(irtype)) {
1188                 return addr;
1189         }
1190
1191         ir_mode *const mode     = get_type_mode(irtype);
1192         ir_node *const memory   = get_store();
1193         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1194         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1195         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1196
1197         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1198                 set_Load_volatility(load, volatility_is_volatile);
1199         }
1200
1201         set_store(load_mem);
1202         return load_res;
1203 }
1204
1205 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1206 {
1207         ir_mode *mode = get_irn_mode(node);
1208
1209         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1210                 return node;
1211         if(!mode_is_float(mode))
1212                 return node;
1213
1214         /* check if there is already a Conv */
1215         if (get_irn_op(node) == op_Conv) {
1216                 /* convert it into a strict Conv */
1217                 set_Conv_strict(node, 1);
1218                 return node;
1219         }
1220
1221         /* otherwise create a new one */
1222         return new_d_strictConv(dbgi, node, mode);
1223 }
1224
1225 static ir_node *get_global_var_address(dbg_info *const dbgi,
1226                                        const declaration_t *const decl)
1227 {
1228         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1229
1230         ir_entity *const entity = decl->v.entity;
1231         switch ((storage_class_tag_t)decl->storage_class) {
1232                 case STORAGE_CLASS_THREAD:
1233                 case STORAGE_CLASS_THREAD_EXTERN:
1234                 case STORAGE_CLASS_THREAD_STATIC: {
1235                         ir_node *const no_mem = new_NoMem();
1236                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1237                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1238                 }
1239
1240                 default:
1241                         return create_global(dbgi, mode_P_data, entity);
1242         }
1243 }
1244
1245 /* Returns the correct base address depending on whether it is a parameter or a
1246  * normal local variable */
1247 static ir_node *get_local_frame(ir_entity *const ent)
1248 {
1249         ir_graph      *const irg   = current_ir_graph;
1250         const ir_type *const owner = get_entity_owner(ent);
1251         if (owner == get_irg_frame_type(irg)) {
1252                 return get_irg_frame(irg);
1253         } else {
1254                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1255                 return get_irg_value_param_base(irg);
1256         }
1257 }
1258
1259 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1260 {
1261         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1262         declaration_t *declaration = ref->declaration;
1263         type_t        *type        = skip_typeref(declaration->type);
1264
1265         switch((declaration_kind_t) declaration->declaration_kind) {
1266         case DECLARATION_KIND_UNKNOWN:
1267                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1268                         break;
1269                 }
1270                 get_ir_type(type);
1271                 /* FALLTHROUGH */
1272
1273         case DECLARATION_KIND_ENUM_ENTRY: {
1274                 ir_mode *const mode = get_ir_mode(type);
1275                 return new_Const(mode, declaration->v.enum_val);
1276         }
1277
1278         case DECLARATION_KIND_LOCAL_VARIABLE: {
1279                 ir_mode *const mode = get_ir_mode(type);
1280                 return get_value(declaration->v.value_number, mode);
1281         }
1282         case DECLARATION_KIND_FUNCTION: {
1283                 ir_mode *const mode = get_ir_mode(type);
1284                 return create_global(dbgi, mode, declaration->v.entity);
1285         }
1286         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1287                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1288                 return deref_address(declaration->type, addr, dbgi);
1289         }
1290
1291         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1292                 ir_entity *entity = declaration->v.entity;
1293                 ir_node   *frame  = get_local_frame(entity);
1294                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1295                 return deref_address(declaration->type, sel, dbgi);
1296         }
1297
1298         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1299                 return declaration->v.vla_base;
1300
1301         case DECLARATION_KIND_COMPOUND_MEMBER:
1302         case DECLARATION_KIND_LABEL_BLOCK:
1303                 panic("not implemented reference type");
1304         }
1305
1306         panic("reference to declaration with unknown type found");
1307 }
1308
1309 static ir_node *reference_addr(const reference_expression_t *ref)
1310 {
1311         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1312         declaration_t *declaration = ref->declaration;
1313
1314         switch((declaration_kind_t) declaration->declaration_kind) {
1315         case DECLARATION_KIND_UNKNOWN:
1316                 break;
1317         case DECLARATION_KIND_LOCAL_VARIABLE:
1318                 panic("local variable without entity has no address");
1319         case DECLARATION_KIND_FUNCTION: {
1320                 type_t *const  type = skip_typeref(ref->base.type);
1321                 ir_mode *const mode = get_ir_mode(type);
1322                 return create_global(dbgi, mode, declaration->v.entity);
1323         }
1324         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1325                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1326                 return addr;
1327         }
1328         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1329                 ir_entity *entity = declaration->v.entity;
1330                 ir_node   *frame  = get_local_frame(entity);
1331                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1332
1333                 return sel;
1334         }
1335
1336         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1337                 return declaration->v.vla_base;
1338
1339         case DECLARATION_KIND_ENUM_ENTRY:
1340                 panic("trying to reference enum entry");
1341
1342         case DECLARATION_KIND_COMPOUND_MEMBER:
1343         case DECLARATION_KIND_LABEL_BLOCK:
1344                 panic("not implemented reference type");
1345         }
1346
1347         panic("reference to declaration with unknown type found");
1348 }
1349
1350 static ir_node *process_builtin_call(const call_expression_t *call)
1351 {
1352         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1353
1354         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1355         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1356
1357         type_t *type = skip_typeref(builtin->base.type);
1358         assert(is_type_pointer(type));
1359
1360         type_t   *function_type = skip_typeref(type->pointer.points_to);
1361         symbol_t *symbol        = builtin->symbol;
1362
1363         switch(symbol->ID) {
1364         case T___builtin_alloca: {
1365                 if(call->arguments == NULL || call->arguments->next != NULL) {
1366                         panic("invalid number of parameters on __builtin_alloca");
1367                 }
1368                 expression_t *argument = call->arguments->expression;
1369                 ir_node      *size     = expression_to_firm(argument);
1370
1371                 ir_node *store  = get_store();
1372                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1373                                               stack_alloc);
1374                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1375                 set_store(proj_m);
1376                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1377
1378                 return res;
1379         }
1380         case T___builtin_nan:
1381         case T___builtin_nanf:
1382         case T___builtin_nand: {
1383                 /* Ignore string for now... */
1384                 assert(is_type_function(function_type));
1385                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1386                 tarval  *tv   = get_mode_NAN(mode);
1387                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1388                 return res;
1389         }
1390         case T___builtin_va_end:
1391                 return NULL;
1392         default:
1393                 panic("Unsupported builtin found\n");
1394         }
1395 }
1396
1397 static ir_node *call_expression_to_firm(const call_expression_t *call)
1398 {
1399         assert(get_cur_block() != NULL);
1400
1401         expression_t *function = call->function;
1402         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1403                 return process_builtin_call(call);
1404         }
1405         ir_node *callee = expression_to_firm(function);
1406
1407         type_t *type = skip_typeref(function->base.type);
1408         assert(is_type_pointer(type));
1409         pointer_type_t *pointer_type = &type->pointer;
1410         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1411         assert(is_type_function(points_to));
1412         function_type_t *function_type = &points_to->function;
1413
1414         int              n_parameters = 0;
1415         call_argument_t *argument     = call->arguments;
1416         for( ; argument != NULL; argument = argument->next) {
1417                 ++n_parameters;
1418         }
1419
1420         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1421
1422         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1423         ir_type *new_method_type = NULL;
1424         if(function_type->variadic || function_type->unspecified_parameters) {
1425                 /* we need to construct a new method type matching the call
1426                  * arguments... */
1427                 int n_res       = get_method_n_ress(ir_method_type);
1428                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1429                 new_method_type = new_d_type_method(unique_ident("calltype"),
1430                                                   n_parameters, n_res, dbgi);
1431                 set_method_calling_convention(new_method_type,
1432                                get_method_calling_convention(ir_method_type));
1433                 set_method_additional_properties(new_method_type,
1434                                get_method_additional_properties(ir_method_type));
1435
1436                 for(int i = 0; i < n_res; ++i) {
1437                         set_method_res_type(new_method_type, i,
1438                                             get_method_res_type(ir_method_type, i));
1439                 }
1440         }
1441         ir_node *in[n_parameters];
1442
1443         argument = call->arguments;
1444         int n = 0;
1445         for( ; argument != NULL; argument = argument->next) {
1446                 expression_t *expression = argument->expression;
1447                 ir_node      *arg_node   = expression_to_firm(expression);
1448
1449                 arg_node = do_strict_conv(dbgi, arg_node);
1450
1451                 in[n] = arg_node;
1452                 if(new_method_type != NULL) {
1453                         ir_type *irtype = get_ir_type(expression->base.type);
1454                         set_method_param_type(new_method_type, n, irtype);
1455                 }
1456
1457                 n++;
1458         }
1459         assert(n == n_parameters);
1460
1461         if(new_method_type != NULL)
1462                 ir_method_type = new_method_type;
1463
1464         ir_node  *store = get_store();
1465         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1466                                      ir_method_type);
1467         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1468         set_store(mem);
1469
1470         type_t  *return_type = skip_typeref(function_type->return_type);
1471         ir_node *result      = NULL;
1472
1473         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1474                 ir_mode *mode;
1475                 if(is_type_scalar(return_type)) {
1476                         mode = get_ir_mode(return_type);
1477                 } else {
1478                         mode = mode_P_data;
1479                 }
1480                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1481                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1482         }
1483
1484         return result;
1485 }
1486
1487 static void statement_to_firm(statement_t *statement);
1488 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1489
1490 static ir_node *expression_to_addr(const expression_t *expression);
1491 static void create_condition_evaluation(const expression_t *expression,
1492                                         ir_node *true_block,
1493                                         ir_node *false_block);
1494
1495 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1496                          ir_node *value)
1497 {
1498         value = do_strict_conv(dbgi, value);
1499
1500         ir_node *memory = get_store();
1501
1502         if(is_type_scalar(type)) {
1503                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1504                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1505                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1506                         set_Store_volatility(store, volatility_is_volatile);
1507                 set_store(store_mem);
1508         } else {
1509                 ir_type *irtype    = get_ir_type(type);
1510                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1511                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1512                 set_store(copyb_mem);
1513         }
1514 }
1515
1516 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1517 {
1518         tarval *all_one   = get_mode_all_one(mode);
1519         int     mode_size = get_mode_size_bits(mode);
1520
1521         assert(offset >= 0 && size >= 0);
1522         assert(offset + size <= mode_size);
1523         if(size == mode_size) {
1524                 return all_one;
1525         }
1526
1527         long    shiftr    = get_mode_size_bits(mode) - size;
1528         long    shiftl    = offset;
1529         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1530         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1531         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1532         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1533
1534         return mask1;
1535 }
1536
1537 static void bitfield_store_to_firm(const unary_expression_t *expression,
1538                                    ir_node *value)
1539 {
1540         expression_t *select = expression->value;
1541         assert(select->kind == EXPR_SELECT);
1542         type_t       *type   = select->base.type;
1543         assert(type->kind == TYPE_BITFIELD);
1544         ir_mode      *mode   = get_ir_mode(type->bitfield.base_type);
1545         ir_node      *addr   = expression_to_addr(select);
1546
1547         assert(get_irn_mode(value) == mode);
1548
1549         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1550
1551         /* kill upper bits of value and shift to right position */
1552         ir_entity *entity       = select->select.compound_entry->v.entity;
1553         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1554         ir_type   *entity_type  = get_entity_type(entity);
1555         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1556
1557         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1558         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1559         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1560         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1561         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1562         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1563
1564         /* load current value */
1565         ir_node  *mem             = get_store();
1566         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1567         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1568         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1569         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1570         tarval   *inv_mask        = tarval_not(shift_mask);
1571         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1572         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1573
1574         /* construct new value and store */
1575         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1576         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1577         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1578         set_store(store_mem);
1579
1580         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1581                 set_Load_volatility(load, volatility_is_volatile);
1582                 set_Store_volatility(store, volatility_is_volatile);
1583         }
1584 }
1585
1586 static void set_value_for_expression(const expression_t *expression,
1587                                      ir_node *value)
1588 {
1589         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1590         value          = do_strict_conv(dbgi, value);
1591
1592         if(expression->kind == EXPR_REFERENCE) {
1593                 const reference_expression_t *ref = &expression->reference;
1594
1595                 declaration_t *declaration = ref->declaration;
1596                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1597                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1598                         set_value(declaration->v.value_number, value);
1599                         return;
1600                 }
1601         }
1602
1603         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1604                 bitfield_store_to_firm(&expression->unary, value);
1605                 return;
1606         }
1607
1608         ir_node *addr = expression_to_addr(expression);
1609         type_t  *type = skip_typeref(expression->base.type);
1610         assign_value(dbgi, addr, type, value);
1611 }
1612
1613 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1614 {
1615         ir_mode *value_mode = get_irn_mode(value);
1616
1617         if (value_mode == dest_mode || is_Bad(value))
1618                 return value;
1619
1620         if(dest_mode == mode_b) {
1621                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1622                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1623                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1624                 return proj;
1625         }
1626
1627         return new_d_Conv(dbgi, value, dest_mode);
1628 }
1629
1630 static ir_node *create_incdec(const unary_expression_t *expression)
1631 {
1632         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1633         type_t       *type  = skip_typeref(expression->base.type);
1634         ir_mode      *mode  = get_ir_mode(type);
1635         expression_t *value = expression->value;
1636
1637         ir_node *value_node = expression_to_firm(value);
1638
1639         ir_node *offset;
1640         if(is_type_pointer(type)) {
1641                 pointer_type_t *pointer_type = &type->pointer;
1642                 offset                       = get_type_size(pointer_type->points_to);
1643         } else {
1644                 assert(is_type_arithmetic(type));
1645                 offset = new_Const(mode, get_mode_one(mode));
1646         }
1647
1648         switch(expression->base.kind) {
1649         case EXPR_UNARY_POSTFIX_INCREMENT: {
1650                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1651                 set_value_for_expression(value, new_value);
1652                 return value_node;
1653         }
1654         case EXPR_UNARY_POSTFIX_DECREMENT: {
1655                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1656                 set_value_for_expression(value, new_value);
1657                 return value_node;
1658         }
1659         case EXPR_UNARY_PREFIX_INCREMENT: {
1660                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1661                 set_value_for_expression(value, new_value);
1662                 return new_value;
1663         }
1664         case EXPR_UNARY_PREFIX_DECREMENT: {
1665                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1666                 set_value_for_expression(value, new_value);
1667                 return new_value;
1668         }
1669         default:
1670                 panic("no incdec expr in create_incdec");
1671                 return NULL;
1672         }
1673 }
1674
1675 static bool is_local_variable(expression_t *expression)
1676 {
1677         if (expression->kind != EXPR_REFERENCE)
1678                 return false;
1679         reference_expression_t *ref_expr    = &expression->reference;
1680         declaration_t          *declaration = ref_expr->declaration;
1681         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1682 }
1683
1684 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1685 {
1686         switch(kind) {
1687         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1688         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1689         case EXPR_BINARY_NOTEQUAL:
1690                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1691         case EXPR_BINARY_ISLESS:
1692         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1693         case EXPR_BINARY_ISLESSEQUAL:
1694         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1695         case EXPR_BINARY_ISGREATER:
1696         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1697         case EXPR_BINARY_ISGREATEREQUAL:
1698         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1699         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1700
1701         default:
1702                 break;
1703         }
1704         panic("trying to get pn_Cmp from non-comparison binexpr type");
1705 }
1706
1707 /**
1708  * Handle the assume optimizer hint: check if a Confirm
1709  * node can be created.
1710  *
1711  * @param dbi    debug info
1712  * @param expr   the IL assume expression
1713  *
1714  * we support here only some simple cases:
1715  *  - var rel const
1716  *  - const rel val
1717  *  - var rel var
1718  */
1719 static ir_node *handle_assume_compare(dbg_info *dbi,
1720                                       const binary_expression_t *expression)
1721 {
1722         expression_t  *op1 = expression->left;
1723         expression_t  *op2 = expression->right;
1724         declaration_t *var2, *var = NULL;
1725         ir_node       *res = NULL;
1726         pn_Cmp         cmp_val;
1727
1728         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1729
1730         if (is_local_variable(op1) && is_local_variable(op2)) {
1731         var  = op1->reference.declaration;
1732             var2 = op2->reference.declaration;
1733
1734                 type_t  *const type = skip_typeref(var->type);
1735                 ir_mode *const mode = get_ir_mode(type);
1736
1737                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1738                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1739
1740                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1741                 set_value(var2->v.value_number, res);
1742
1743                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1744                 set_value(var->v.value_number, res);
1745
1746                 return res;
1747         }
1748
1749         expression_t *con;
1750         if (is_local_variable(op1) && is_constant_expression(op2)) {
1751                 var = op1->reference.declaration;
1752                 con = op2;
1753         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1754                 cmp_val = get_inversed_pnc(cmp_val);
1755                 var = op2->reference.declaration;
1756                 con = op1;
1757         }
1758
1759         if (var != NULL) {
1760                 type_t  *const type = skip_typeref(var->type);
1761                 ir_mode *const mode = get_ir_mode(type);
1762
1763                 res = get_value(var->v.value_number, mode);
1764                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1765                 set_value(var->v.value_number, res);
1766         }
1767         return res;
1768 }
1769
1770 /**
1771  * Handle the assume optimizer hint.
1772  *
1773  * @param dbi    debug info
1774  * @param expr   the IL assume expression
1775  */
1776 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1777         switch(expression->kind) {
1778         case EXPR_BINARY_EQUAL:
1779         case EXPR_BINARY_NOTEQUAL:
1780         case EXPR_BINARY_LESS:
1781         case EXPR_BINARY_LESSEQUAL:
1782         case EXPR_BINARY_GREATER:
1783         case EXPR_BINARY_GREATEREQUAL:
1784                 return handle_assume_compare(dbi, &expression->binary);
1785         default:
1786                 return NULL;
1787         }
1788 }
1789
1790 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1791 {
1792         expression_t *select = expression->value;
1793         assert(select->kind == EXPR_SELECT);
1794
1795         type_t   *type     = select->base.type;
1796         assert(type->kind == TYPE_BITFIELD);
1797         ir_mode  *mode     = get_ir_mode(type->bitfield.base_type);
1798         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1799         ir_node  *addr     = expression_to_addr(select);
1800         ir_node  *mem      = get_store();
1801         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1802         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1803         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1804
1805         load_res           = create_conv(dbgi, load_res, mode_int);
1806
1807         set_store(load_mem);
1808
1809         /* kill upper bits */
1810         ir_entity *entity       = select->select.compound_entry->v.entity;
1811         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1812         ir_type   *entity_type  = get_entity_type(entity);
1813         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1814         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1815         assert(shift_bitsl >= 0);
1816         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1817         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1818         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1819
1820         long       shift_bitsr  = bitoffset + shift_bitsl;
1821         assert(shift_bitsr <= (long) machine_size);
1822         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1823         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1824         ir_node   *shiftr;
1825         if(mode_is_signed(mode)) {
1826                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1827         } else {
1828                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1829         }
1830
1831         return create_conv(dbgi, shiftr, mode);
1832 }
1833
1834 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1835 {
1836         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1837         type_t   *type = skip_typeref(expression->base.type);
1838
1839         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1840                 return expression_to_addr(expression->value);
1841
1842         const expression_t *value = expression->value;
1843
1844         switch(expression->base.kind) {
1845         case EXPR_UNARY_NEGATE: {
1846                 ir_node *value_node = expression_to_firm(value);
1847                 ir_mode *mode = get_ir_mode(type);
1848                 return new_d_Minus(dbgi, value_node, mode);
1849         }
1850         case EXPR_UNARY_PLUS:
1851                 return expression_to_firm(value);
1852         case EXPR_UNARY_BITWISE_NEGATE: {
1853                 ir_node *value_node = expression_to_firm(value);
1854                 ir_mode *mode = get_ir_mode(type);
1855                 return new_d_Not(dbgi, value_node, mode);
1856         }
1857         case EXPR_UNARY_NOT: {
1858                 ir_node *value_node = expression_to_firm(value);
1859                 ir_mode *mode = get_ir_mode(type);
1860                 if(get_irn_mode(value_node) != mode_b) {
1861                         value_node = create_conv(dbgi, value_node, mode_b);
1862                 }
1863                 value_node = new_d_Not(dbgi, value_node, mode_b);
1864                 if(mode != mode_b) {
1865                         value_node = create_conv(dbgi, value_node, mode);
1866                 }
1867                 return value_node;
1868         }
1869         case EXPR_UNARY_DEREFERENCE: {
1870                 ir_node *value_node = expression_to_firm(value);
1871                 type_t  *value_type = skip_typeref(value->base.type);
1872                 assert(is_type_pointer(value_type));
1873                 type_t  *points_to  = value_type->pointer.points_to;
1874                 return deref_address(points_to, value_node, dbgi);
1875         }
1876         case EXPR_UNARY_POSTFIX_INCREMENT:
1877         case EXPR_UNARY_POSTFIX_DECREMENT:
1878         case EXPR_UNARY_PREFIX_INCREMENT:
1879         case EXPR_UNARY_PREFIX_DECREMENT:
1880                 return create_incdec(expression);
1881         case EXPR_UNARY_CAST: {
1882                 ir_node *value_node = expression_to_firm(value);
1883                 if(is_type_scalar(type)) {
1884                         ir_mode *mode = get_ir_mode(type);
1885                         ir_node *node = create_conv(dbgi, value_node, mode);
1886                         node = do_strict_conv(dbgi, node);
1887                         return node;
1888                 } else {
1889                         /* make sure firm type is constructed */
1890                         (void) get_ir_type(type);
1891                         return value_node;
1892                 }
1893         }
1894         case EXPR_UNARY_CAST_IMPLICIT: {
1895                 ir_node *value_node = expression_to_firm(value);
1896                 if(is_type_scalar(type)) {
1897                         ir_mode *mode = get_ir_mode(type);
1898                         return create_conv(dbgi, value_node, mode);
1899                 } else {
1900                         return value_node;
1901                 }
1902         }
1903         case EXPR_UNARY_ASSUME:
1904                 if(firm_opt.confirm)
1905                         return handle_assume(dbgi, value);
1906                 else
1907                         return NULL;
1908         case EXPR_UNARY_BITFIELD_EXTRACT:
1909                 return bitfield_extract_to_firm(expression);
1910
1911         default:
1912                 break;
1913         }
1914         panic("invalid UNEXPR type found");
1915 }
1916
1917 static ir_node *produce_condition_result(const expression_t *expression,
1918                                          dbg_info *dbgi)
1919 {
1920         ir_mode *mode      = get_ir_mode(expression->base.type);
1921         ir_node *cur_block = get_cur_block();
1922
1923         ir_node *one_block = new_immBlock();
1924         ir_node *one       = new_Const(mode, get_mode_one(mode));
1925         ir_node *jmp_one   = new_d_Jmp(dbgi);
1926
1927         ir_node *zero_block = new_immBlock();
1928         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1929         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1930
1931         set_cur_block(cur_block);
1932         create_condition_evaluation(expression, one_block, zero_block);
1933         mature_immBlock(one_block);
1934         mature_immBlock(zero_block);
1935
1936         ir_node *common_block = new_immBlock();
1937         add_immBlock_pred(common_block, jmp_one);
1938         add_immBlock_pred(common_block, jmp_zero);
1939         mature_immBlock(common_block);
1940
1941         ir_node *in[2] = { one, zero };
1942         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1943
1944         return val;
1945 }
1946
1947 static ir_node *create_lazy_op(const binary_expression_t *expression)
1948 {
1949         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1950         type_t   *type = expression->base.type;
1951         ir_mode  *mode = get_ir_mode(type);
1952
1953         if(is_constant_expression(expression->left)) {
1954                 long val = fold_constant(expression->left);
1955                 expression_kind_t ekind = expression->base.kind;
1956                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1957                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1958                         return expression_to_firm(expression->right);
1959                 } else {
1960                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1961                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1962                         return new_Const(mode, get_mode_one(mode));
1963                 }
1964         }
1965
1966         return produce_condition_result((const expression_t*) expression, dbgi);
1967 }
1968
1969 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1970                                             ir_node *right, ir_mode *mode);
1971
1972 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1973                                         create_arithmetic_func func)
1974 {
1975         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1976         ir_node  *left  = expression_to_firm(expression->left);
1977         ir_node  *right = expression_to_firm(expression->right);
1978         type_t   *type  = expression->right->base.type;
1979         /* be careful with the modes, because in arithmetic assign nodes only
1980          * the right operand has the mode of the arithmetic already */
1981         ir_mode  *mode  = get_ir_mode(type);
1982         left            = create_conv(dbgi, left, mode);
1983         ir_node  *res   = func(dbgi, left, right, mode);
1984
1985         return res;
1986 }
1987
1988 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1989                                    ir_node  *      integer,
1990                                    type_t   *const type,
1991                                    dbg_info *const dbgi,
1992                                    const create_arithmetic_func func)
1993 {
1994         pointer_type_t *const pointer_type = &type->pointer;
1995         type_t         *const points_to    = pointer_type->points_to;
1996         const unsigned        elem_size    = get_type_size_const(points_to);
1997
1998         assert(elem_size >= 1);
1999         if (elem_size > 1) {
2000                 integer             = create_conv(dbgi, integer, mode_int);
2001                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2002                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
2003                 integer = mul;
2004         }
2005
2006         ir_mode *const mode = get_ir_mode(type);
2007         return func(dbgi, pointer, integer, mode);
2008 }
2009
2010 static ir_node *create_arithmetic_assign_binop(
2011                 const binary_expression_t *expression, create_arithmetic_func func)
2012 {
2013         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2014         type_t   *const type = skip_typeref(expression->base.type);
2015         ir_node  *value;
2016
2017         if (is_type_pointer(type)) {
2018                 ir_node *const pointer = expression_to_firm(expression->left);
2019                 ir_node *      integer = expression_to_firm(expression->right);
2020                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
2021         } else {
2022                 value = create_arithmetic_binop(expression, func);
2023         }
2024
2025         ir_mode *const mode = get_ir_mode(type);
2026         value = create_conv(dbgi, value, mode);
2027         set_value_for_expression(expression->left, value);
2028
2029         return value;
2030 }
2031
2032 static ir_node *create_add(const binary_expression_t *expression)
2033 {
2034         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2035         ir_node  *left  = expression_to_firm(expression->left);
2036         ir_node  *right = expression_to_firm(expression->right);
2037         type_t   *type  = expression->base.type;
2038
2039         expression_t *expr_left  = expression->left;
2040         expression_t *expr_right = expression->right;
2041         type_t       *type_left  = skip_typeref(expr_left->base.type);
2042         type_t       *type_right = skip_typeref(expr_right->base.type);
2043
2044         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2045                 ir_mode *const mode = get_ir_mode(type);
2046                 return new_d_Add(dbgi, left, right, mode);
2047         }
2048
2049         if (is_type_pointer(type_left)) {
2050                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2051         } else {
2052                 assert(is_type_pointer(type_right));
2053                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2054         }
2055 }
2056
2057 static ir_node *create_sub(const binary_expression_t *expression)
2058 {
2059         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2060         expression_t *const expr_left  = expression->left;
2061         expression_t *const expr_right = expression->right;
2062         ir_node      *const left       = expression_to_firm(expr_left);
2063         ir_node      *const right      = expression_to_firm(expr_right);
2064         type_t       *const type       = expression->base.type;
2065         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2066         type_t       *const type_right = skip_typeref(expr_right->base.type);
2067
2068         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2069                 ir_mode *const mode = get_ir_mode(type);
2070                 return new_d_Sub(dbgi, left, right, mode);
2071         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2072                 const pointer_type_t *const ptr_type = &type_left->pointer;
2073
2074                 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2075                 ir_mode *const mode      = get_ir_mode(type);
2076                 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2077                 ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2078                 ir_node *const no_mem    = new_NoMem();
2079                 ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2080                                                        op_pin_state_floats);
2081                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2082         }
2083
2084         assert(is_type_pointer(type_left));
2085         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2086 }
2087
2088 static ir_node *create_shift(const binary_expression_t *expression)
2089 {
2090         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2091         ir_node  *left  = expression_to_firm(expression->left);
2092         ir_node  *right = expression_to_firm(expression->right);
2093         type_t   *type  = expression->base.type;
2094         ir_mode  *mode  = get_ir_mode(type);
2095
2096         /* firm always wants the shift count to be unsigned */
2097         right = create_conv(dbgi, right, mode_uint);
2098
2099         ir_node *res;
2100
2101         switch(expression->base.kind) {
2102         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2103         case EXPR_BINARY_SHIFTLEFT:
2104                 res = new_d_Shl(dbgi, left, right, mode);
2105                 break;
2106         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2107         case EXPR_BINARY_SHIFTRIGHT: {
2108                  expression_t *expr_left = expression->left;
2109                  type_t       *type_left = skip_typeref(expr_left->base.type);
2110
2111                  if(is_type_signed(type_left)) {
2112                         res = new_d_Shrs(dbgi, left, right, mode);
2113                  } else {
2114                          res = new_d_Shr(dbgi, left, right, mode);
2115                  }
2116                  break;
2117         }
2118         default:
2119                 panic("create shift op called for non-shift op");
2120         }
2121
2122         return res;
2123 }
2124
2125
2126 static ir_node *create_divmod(const binary_expression_t *expression)
2127 {
2128         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2129         ir_node  *left  = expression_to_firm(expression->left);
2130         ir_node  *right = expression_to_firm(expression->right);
2131         ir_node  *pin   = new_Pin(new_NoMem());
2132         /* be careful with the modes, because in arithmetic assign nodes only
2133          * the right operand has the mode of the arithmetic already */
2134         type_t   *type  = expression->right->base.type;
2135         ir_mode  *mode  = get_ir_mode(type);
2136         left            = create_conv(dbgi, left, mode);
2137         ir_node  *op;
2138         ir_node  *res;
2139
2140         switch (expression->base.kind) {
2141         case EXPR_BINARY_DIV:
2142         case EXPR_BINARY_DIV_ASSIGN:
2143                 if(mode_is_float(mode)) {
2144                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2145                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2146                 } else {
2147                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2148                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2149                 }
2150                 break;
2151
2152         case EXPR_BINARY_MOD:
2153         case EXPR_BINARY_MOD_ASSIGN:
2154                 assert(!mode_is_float(mode));
2155                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2156                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2157                 break;
2158
2159         default: panic("unexpected binary expression type in create_divmod()");
2160         }
2161
2162         return res;
2163 }
2164
2165 static ir_node *create_arithmetic_assign_divmod(
2166                 const binary_expression_t *expression)
2167 {
2168         ir_node  *      value = create_divmod(expression);
2169         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2170         type_t   *const type  = expression->base.type;
2171         ir_mode  *const mode  = get_ir_mode(type);
2172
2173         assert(type->kind != TYPE_POINTER);
2174
2175         value = create_conv(dbgi, value, mode);
2176         set_value_for_expression(expression->left, value);
2177
2178         return value;
2179 }
2180
2181 static ir_node *create_arithmetic_assign_shift(
2182                 const binary_expression_t *expression)
2183 {
2184         ir_node  *      value = create_shift(expression);
2185         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2186         type_t   *const type  = expression->base.type;
2187         ir_mode  *const mode  = get_ir_mode(type);
2188
2189         value = create_conv(dbgi, value, mode);
2190         set_value_for_expression(expression->left, value);
2191
2192         return value;
2193 }
2194
2195 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2196 {
2197         expression_kind_t kind = expression->base.kind;
2198
2199         switch(kind) {
2200         case EXPR_BINARY_EQUAL:
2201         case EXPR_BINARY_NOTEQUAL:
2202         case EXPR_BINARY_LESS:
2203         case EXPR_BINARY_LESSEQUAL:
2204         case EXPR_BINARY_GREATER:
2205         case EXPR_BINARY_GREATEREQUAL:
2206         case EXPR_BINARY_ISGREATER:
2207         case EXPR_BINARY_ISGREATEREQUAL:
2208         case EXPR_BINARY_ISLESS:
2209         case EXPR_BINARY_ISLESSEQUAL:
2210         case EXPR_BINARY_ISLESSGREATER:
2211         case EXPR_BINARY_ISUNORDERED: {
2212                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2213                 ir_node *left  = expression_to_firm(expression->left);
2214                 ir_node *right = expression_to_firm(expression->right);
2215                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2216                 long     pnc   = get_pnc(kind, expression->left->base.type);
2217                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2218                 return proj;
2219         }
2220         case EXPR_BINARY_ASSIGN: {
2221                 ir_node *right = expression_to_firm(expression->right);
2222                 set_value_for_expression(expression->left, right);
2223
2224                 return right;
2225         }
2226         case EXPR_BINARY_ADD:
2227                 return create_add(expression);
2228         case EXPR_BINARY_SUB:
2229                 return create_sub(expression);
2230         case EXPR_BINARY_MUL:
2231                 return create_arithmetic_binop(expression, new_d_Mul);
2232         case EXPR_BINARY_BITWISE_AND:
2233                 return create_arithmetic_binop(expression, new_d_And);
2234         case EXPR_BINARY_BITWISE_OR:
2235                 return create_arithmetic_binop(expression, new_d_Or);
2236         case EXPR_BINARY_BITWISE_XOR:
2237                 return create_arithmetic_binop(expression, new_d_Eor);
2238         case EXPR_BINARY_SHIFTLEFT:
2239         case EXPR_BINARY_SHIFTRIGHT:
2240                 return create_shift(expression);
2241         case EXPR_BINARY_DIV:
2242         case EXPR_BINARY_MOD:
2243                 return create_divmod(expression);
2244         case EXPR_BINARY_LOGICAL_AND:
2245         case EXPR_BINARY_LOGICAL_OR:
2246                 return create_lazy_op(expression);
2247         case EXPR_BINARY_COMMA:
2248                 expression_to_firm(expression->left);
2249                 return expression_to_firm(expression->right);
2250         case EXPR_BINARY_ADD_ASSIGN:
2251                 return create_arithmetic_assign_binop(expression, new_d_Add);
2252         case EXPR_BINARY_SUB_ASSIGN:
2253                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2254         case EXPR_BINARY_MUL_ASSIGN:
2255                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2256         case EXPR_BINARY_MOD_ASSIGN:
2257         case EXPR_BINARY_DIV_ASSIGN:
2258                 return create_arithmetic_assign_divmod(expression);
2259         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2260                 return create_arithmetic_assign_binop(expression, new_d_And);
2261         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2262                 return create_arithmetic_assign_binop(expression, new_d_Or);
2263         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2264                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2265         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2266         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2267                 return create_arithmetic_assign_shift(expression);
2268         case EXPR_BINARY_BUILTIN_EXPECT:
2269                 return expression_to_firm(expression->left);
2270         default:
2271                 panic("TODO binexpr type");
2272         }
2273 }
2274
2275 static ir_node *array_access_addr(const array_access_expression_t *expression)
2276 {
2277         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2278         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2279         ir_node  *offset    = expression_to_firm(expression->index);
2280         offset              = create_conv(dbgi, offset, mode_uint);
2281
2282         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2283         assert(is_type_pointer(ref_type));
2284         pointer_type_t *pointer_type = &ref_type->pointer;
2285
2286         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2287         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2288                                              mode_uint);
2289         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2290
2291         return result;
2292 }
2293
2294 static ir_node *array_access_to_firm(
2295                 const array_access_expression_t *expression)
2296 {
2297         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2298         ir_node  *addr   = array_access_addr(expression);
2299         type_t   *type   = revert_automatic_type_conversion(
2300                         (const expression_t*) expression);
2301         type             = skip_typeref(type);
2302
2303         return deref_address(type, addr, dbgi);
2304 }
2305
2306 static long get_offsetof_offset(const offsetof_expression_t *expression)
2307 {
2308         type_t *orig_type = expression->type;
2309         long    offset    = 0;
2310
2311         designator_t *designator = expression->designator;
2312         for( ; designator != NULL; designator = designator->next) {
2313                 type_t *type = skip_typeref(orig_type);
2314                 /* be sure the type is constructed */
2315                 (void) get_ir_type(type);
2316
2317                 if(designator->symbol != NULL) {
2318                         assert(is_type_compound(type));
2319                         symbol_t *symbol = designator->symbol;
2320
2321                         declaration_t *declaration = type->compound.declaration;
2322                         declaration_t *iter        = declaration->scope.declarations;
2323                         for( ; iter != NULL; iter = iter->next) {
2324                                 if(iter->symbol == symbol) {
2325                                         break;
2326                                 }
2327                         }
2328                         assert(iter != NULL);
2329
2330                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2331                         offset += get_entity_offset(iter->v.entity);
2332
2333                         orig_type = iter->type;
2334                 } else {
2335                         expression_t *array_index = designator->array_index;
2336                         assert(designator->array_index != NULL);
2337                         assert(is_type_array(type));
2338                         assert(is_type_valid(array_index->base.type));
2339
2340                         long index         = fold_constant(array_index);
2341                         ir_type *arr_type  = get_ir_type(type);
2342                         ir_type *elem_type = get_array_element_type(arr_type);
2343                         long     elem_size = get_type_size_bytes(elem_type);
2344
2345                         offset += index * elem_size;
2346
2347                         orig_type = type->array.element_type;
2348                 }
2349         }
2350
2351         return offset;
2352 }
2353
2354 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2355 {
2356         ir_mode  *mode   = get_ir_mode(expression->base.type);
2357         long      offset = get_offsetof_offset(expression);
2358         tarval   *tv     = new_tarval_from_long(offset, mode);
2359         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2360
2361         return new_d_Const(dbgi, mode, tv);
2362 }
2363
2364 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2365                                      ir_entity *entity, type_t *type);
2366
2367 static ir_node *compound_literal_to_firm(
2368                 const compound_literal_expression_t *expression)
2369 {
2370         type_t *type = expression->type;
2371
2372         /* create an entity on the stack */
2373         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2374
2375         ident     *const id     = unique_ident("CompLit");
2376         ir_type   *const irtype = get_ir_type(type);
2377         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2378         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2379         set_entity_ld_ident(entity, id);
2380
2381         set_entity_variability(entity, variability_uninitialized);
2382
2383         /* create initialisation code */
2384         initializer_t *initializer = expression->initializer;
2385         create_local_initializer(initializer, dbgi, entity, type);
2386
2387         /* create a sel for the compound literal address */
2388         ir_node *frame = get_local_frame(entity);
2389         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2390         return sel;
2391 }
2392
2393 /**
2394  * Transform a sizeof expression into Firm code.
2395  */
2396 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2397 {
2398         type_t *type = expression->type;
2399         if(type == NULL) {
2400                 type = expression->tp_expression->base.type;
2401                 assert(type != NULL);
2402         }
2403
2404         type = skip_typeref(type);
2405         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2406         if(is_type_array(type) && type->array.is_vla
2407                         && expression->tp_expression != NULL) {
2408                 expression_to_firm(expression->tp_expression);
2409         }
2410
2411         return get_type_size(type);
2412 }
2413
2414 /**
2415  * Transform an alignof expression into Firm code.
2416  */
2417 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2418 {
2419         type_t *type = expression->type;
2420         if(type == NULL) {
2421                 /* beware: if expression is a variable reference, return the
2422                    alignment of the variable. */
2423                 const expression_t *tp_expression = expression->tp_expression;
2424                 const declaration_t *declaration = expr_is_variable(tp_expression);
2425                 if (declaration != NULL) {
2426                         /* TODO: get the alignment of this variable. */
2427                 }
2428                 type = tp_expression->base.type;
2429                 assert(type != NULL);
2430         }
2431
2432         ir_mode *const mode = get_ir_mode(expression->base.type);
2433         symconst_symbol sym;
2434         sym.type_p = get_ir_type(type);
2435         return new_SymConst(mode, sym, symconst_type_align);
2436 }
2437
2438 static void init_ir_types(void);
2439 long fold_constant(const expression_t *expression)
2440 {
2441         init_ir_types();
2442
2443         assert(is_constant_expression(expression));
2444
2445         ir_graph *old_current_ir_graph = current_ir_graph;
2446         if(current_ir_graph == NULL) {
2447                 current_ir_graph = get_const_code_irg();
2448         }
2449
2450         ir_node *cnst = expression_to_firm(expression);
2451         current_ir_graph = old_current_ir_graph;
2452
2453         if(!is_Const(cnst)) {
2454                 panic("couldn't fold constant\n");
2455         }
2456
2457         tarval *tv = get_Const_tarval(cnst);
2458         if(!tarval_is_long(tv)) {
2459                 panic("result of constant folding is not integer\n");
2460         }
2461
2462         return get_tarval_long(tv);
2463 }
2464
2465 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2466 {
2467         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2468
2469         /* first try to fold a constant condition */
2470         if(is_constant_expression(expression->condition)) {
2471                 long val = fold_constant(expression->condition);
2472                 if(val) {
2473                         return expression_to_firm(expression->true_expression);
2474                 } else {
2475                         return expression_to_firm(expression->false_expression);
2476                 }
2477         }
2478
2479         ir_node *cur_block   = get_cur_block();
2480
2481         /* create the true block */
2482         ir_node *true_block  = new_immBlock();
2483
2484         ir_node *true_val = expression_to_firm(expression->true_expression);
2485         ir_node *true_jmp = new_Jmp();
2486
2487         /* create the false block */
2488         ir_node *false_block = new_immBlock();
2489
2490         ir_node *false_val = expression_to_firm(expression->false_expression);
2491         ir_node *false_jmp = new_Jmp();
2492
2493         /* create the condition evaluation */
2494         set_cur_block(cur_block);
2495         create_condition_evaluation(expression->condition, true_block, false_block);
2496         mature_immBlock(true_block);
2497         mature_immBlock(false_block);
2498
2499         /* create the common block */
2500         ir_node *common_block = new_immBlock();
2501         add_immBlock_pred(common_block, true_jmp);
2502         add_immBlock_pred(common_block, false_jmp);
2503         mature_immBlock(common_block);
2504
2505         /* TODO improve static semantics, so either both or no values are NULL */
2506         if (true_val == NULL || false_val == NULL)
2507                 return NULL;
2508
2509         ir_node *in[2] = { true_val, false_val };
2510         ir_mode *mode  = get_irn_mode(true_val);
2511         assert(get_irn_mode(false_val) == mode);
2512         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2513
2514         return val;
2515 }
2516
2517 static ir_node *select_addr(const select_expression_t *expression)
2518 {
2519         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2520
2521         ir_node *compound_addr = expression_to_firm(expression->compound);
2522
2523         declaration_t *entry = expression->compound_entry;
2524         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2525         ir_entity     *entity = entry->v.entity;
2526
2527         assert(entity != NULL);
2528
2529         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2530
2531         return sel;
2532 }
2533
2534 static ir_node *select_to_firm(const select_expression_t *expression)
2535 {
2536         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2537         ir_node  *addr   = select_addr(expression);
2538         type_t   *type   = revert_automatic_type_conversion(
2539                         (const expression_t*) expression);
2540         type             = skip_typeref(type);
2541
2542         return deref_address(type, addr, dbgi);
2543 }
2544
2545 /* Values returned by __builtin_classify_type. */
2546 typedef enum gcc_type_class
2547 {
2548         no_type_class = -1,
2549         void_type_class,
2550         integer_type_class,
2551         char_type_class,
2552         enumeral_type_class,
2553         boolean_type_class,
2554         pointer_type_class,
2555         reference_type_class,
2556         offset_type_class,
2557         real_type_class,
2558         complex_type_class,
2559         function_type_class,
2560         method_type_class,
2561         record_type_class,
2562         union_type_class,
2563         array_type_class,
2564         string_type_class,
2565         set_type_class,
2566         file_type_class,
2567         lang_type_class
2568 } gcc_type_class;
2569
2570 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2571 {
2572         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2573
2574         gcc_type_class tc;
2575         switch (type->kind)
2576         {
2577                 case TYPE_ATOMIC: {
2578                         const atomic_type_t *const atomic_type = &type->atomic;
2579                         switch (atomic_type->akind) {
2580                                 /* should not be reached */
2581                                 case ATOMIC_TYPE_INVALID:
2582                                         tc = no_type_class;
2583                                         goto make_const;
2584
2585                                 /* gcc cannot do that */
2586                                 case ATOMIC_TYPE_VOID:
2587                                         tc = void_type_class;
2588                                         goto make_const;
2589
2590                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2591                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2592                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2593                                 case ATOMIC_TYPE_SHORT:
2594                                 case ATOMIC_TYPE_USHORT:
2595                                 case ATOMIC_TYPE_INT:
2596                                 case ATOMIC_TYPE_UINT:
2597                                 case ATOMIC_TYPE_LONG:
2598                                 case ATOMIC_TYPE_ULONG:
2599                                 case ATOMIC_TYPE_LONGLONG:
2600                                 case ATOMIC_TYPE_ULONGLONG:
2601                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2602                                         tc = integer_type_class;
2603                                         goto make_const;
2604
2605                                 case ATOMIC_TYPE_FLOAT:
2606                                 case ATOMIC_TYPE_DOUBLE:
2607                                 case ATOMIC_TYPE_LONG_DOUBLE:
2608                                         tc = real_type_class;
2609                                         goto make_const;
2610                         }
2611                         panic("Unexpected atomic type in classify_type_to_firm().");
2612                 }
2613
2614                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2615                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2616                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2617                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2618                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2619                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2620                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2621                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2622
2623                 /* gcc handles this as integer */
2624                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2625
2626                 case TYPE_BUILTIN:
2627                 /* typedef/typeof should be skipped already */
2628                 case TYPE_TYPEDEF:
2629                 case TYPE_TYPEOF:
2630                 case TYPE_INVALID:
2631                 case TYPE_ERROR:
2632                         break;
2633         }
2634         panic("unexpected TYPE classify_type_to_firm().");
2635
2636 make_const: ;
2637         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2638         ir_mode  *const mode = mode_int;
2639         tarval   *const tv   = new_tarval_from_long(tc, mode);
2640         return new_d_Const(dbgi, mode, tv);
2641 }
2642
2643 static ir_node *function_name_to_firm(
2644                 const funcname_expression_t *const expr)
2645 {
2646         switch(expr->kind) {
2647         case FUNCNAME_FUNCTION:
2648         case FUNCNAME_PRETTY_FUNCTION:
2649         case FUNCNAME_FUNCDNAME:
2650                 if (current_function_name == NULL) {
2651                         const source_position_t *const src_pos = &expr->base.source_position;
2652                         const char *const name = current_function_decl->symbol->string;
2653                         const string_t string = { name, strlen(name) + 1 };
2654                         current_function_name = string_to_firm(src_pos, "__func__", &string);
2655                 }
2656                 return current_function_name;
2657         case FUNCNAME_FUNCSIG:
2658                 if (current_funcsig == NULL) {
2659                         const source_position_t *const src_pos = &expr->base.source_position;
2660                         ir_entity *ent = get_irg_entity(current_ir_graph);
2661                         const char *const name = get_entity_ld_name(ent);
2662                         const string_t string = { name, strlen(name) + 1 };
2663                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__", &string);
2664                 }
2665                 return current_funcsig;
2666         }
2667         panic("Unsupported function name");
2668 }
2669
2670 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2671 {
2672         statement_t *statement = expr->statement;
2673
2674         assert(statement->kind == STATEMENT_COMPOUND);
2675         return compound_statement_to_firm(&statement->compound);
2676 }
2677
2678 static ir_node *va_start_expression_to_firm(
2679         const va_start_expression_t *const expr)
2680 {
2681         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2682         int        const n           = get_method_n_params(method_type) - 1;
2683         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2684         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2685         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2686         ir_node   *const no_mem      = new_NoMem();
2687         ir_node   *const arg_sel     =
2688                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2689
2690         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2691         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2692         set_value_for_expression(expr->ap, add);
2693
2694         return NULL;
2695 }
2696
2697 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2698 {
2699         type_t   *const type   = expr->base.type;
2700         ir_node  *const ap     = expression_to_firm(expr->ap);
2701         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2702         ir_node  *const res    = deref_address(type, ap, dbgi);
2703
2704         ir_node  *const cnst   = get_type_size(expr->base.type);
2705         ir_node  *const add    = new_d_Add(dbgi, ap, cnst, mode_P_data);
2706         set_value_for_expression(expr->ap, add);
2707
2708         return res;
2709 }
2710
2711 static ir_node *dereference_addr(const unary_expression_t *const expression)
2712 {
2713         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2714         return expression_to_firm(expression->value);
2715 }
2716
2717 static ir_node *expression_to_addr(const expression_t *expression)
2718 {
2719         switch(expression->kind) {
2720         case EXPR_REFERENCE:
2721                 return reference_addr(&expression->reference);
2722         case EXPR_ARRAY_ACCESS:
2723                 return array_access_addr(&expression->array_access);
2724         case EXPR_SELECT:
2725                 return select_addr(&expression->select);
2726         case EXPR_CALL:
2727                 return call_expression_to_firm(&expression->call);
2728         case EXPR_UNARY_DEREFERENCE: {
2729                 return dereference_addr(&expression->unary);
2730         }
2731         default:
2732                 break;
2733         }
2734         panic("trying to get address of non-lvalue");
2735 }
2736
2737 static ir_node *builtin_constant_to_firm(
2738                 const builtin_constant_expression_t *expression)
2739 {
2740         ir_mode *mode = get_ir_mode(expression->base.type);
2741         long     v;
2742
2743         if (is_constant_expression(expression->value)) {
2744                 v = 1;
2745         } else {
2746                 v = 0;
2747         }
2748         return new_Const_long(mode, v);
2749 }
2750
2751 static ir_node *builtin_prefetch_to_firm(
2752                 const builtin_prefetch_expression_t *expression)
2753 {
2754         ir_node *adr = expression_to_firm(expression->adr);
2755         /* no Firm support for prefetch yet */
2756         (void) adr;
2757         return NULL;
2758 }
2759
2760 static ir_node *_expression_to_firm(const expression_t *expression)
2761 {
2762         switch(expression->kind) {
2763         case EXPR_CHARACTER_CONSTANT:
2764                 return character_constant_to_firm(&expression->conste);
2765         case EXPR_WIDE_CHARACTER_CONSTANT:
2766                 return wide_character_constant_to_firm(&expression->conste);
2767         case EXPR_CONST:
2768                 return const_to_firm(&expression->conste);
2769         case EXPR_STRING_LITERAL:
2770                 return string_literal_to_firm(&expression->string);
2771         case EXPR_WIDE_STRING_LITERAL:
2772                 return wide_string_literal_to_firm(&expression->wide_string);
2773         case EXPR_REFERENCE:
2774                 return reference_expression_to_firm(&expression->reference);
2775         case EXPR_CALL:
2776                 return call_expression_to_firm(&expression->call);
2777         EXPR_UNARY_CASES
2778                 return unary_expression_to_firm(&expression->unary);
2779         EXPR_BINARY_CASES
2780                 return binary_expression_to_firm(&expression->binary);
2781         case EXPR_ARRAY_ACCESS:
2782                 return array_access_to_firm(&expression->array_access);
2783         case EXPR_SIZEOF:
2784                 return sizeof_to_firm(&expression->typeprop);
2785         case EXPR_ALIGNOF:
2786                 return alignof_to_firm(&expression->typeprop);
2787         case EXPR_CONDITIONAL:
2788                 return conditional_to_firm(&expression->conditional);
2789         case EXPR_SELECT:
2790                 return select_to_firm(&expression->select);
2791         case EXPR_CLASSIFY_TYPE:
2792                 return classify_type_to_firm(&expression->classify_type);
2793         case EXPR_FUNCNAME:
2794                 return function_name_to_firm(&expression->funcname);
2795         case EXPR_STATEMENT:
2796                 return statement_expression_to_firm(&expression->statement);
2797         case EXPR_VA_START:
2798                 return va_start_expression_to_firm(&expression->va_starte);
2799         case EXPR_VA_ARG:
2800                 return va_arg_expression_to_firm(&expression->va_arge);
2801         case EXPR_BUILTIN_SYMBOL:
2802                 panic("unimplemented expression found");
2803         case EXPR_BUILTIN_CONSTANT_P:
2804                 return builtin_constant_to_firm(&expression->builtin_constant);
2805         case EXPR_BUILTIN_PREFETCH:
2806                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2807         case EXPR_OFFSETOF:
2808                 return offsetof_to_firm(&expression->offsetofe);
2809         case EXPR_COMPOUND_LITERAL:
2810                 return compound_literal_to_firm(&expression->compound_literal);
2811
2812         case EXPR_UNKNOWN:
2813         case EXPR_INVALID:
2814                 break;
2815         }
2816         panic("invalid expression found");
2817 }
2818
2819 static ir_node *expression_to_firm(const expression_t *expression)
2820 {
2821         ir_node *res = _expression_to_firm(expression);
2822
2823         if(res != NULL && get_irn_mode(res) == mode_b) {
2824                 ir_mode *mode = get_ir_mode(expression->base.type);
2825                 if(is_Const(res)) {
2826                         if(is_Const_null(res)) {
2827                                 return new_Const_long(mode, 0);
2828                         } else {
2829                                 assert(is_Const_one(res));
2830                                 return new_Const_long(mode, 1);
2831                         }
2832                 }
2833
2834                 dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2835                 return produce_condition_result(expression, dbgi);
2836         }
2837
2838         return res;
2839 }
2840
2841 static ir_node *expression_to_modeb(const expression_t *expression)
2842 {
2843         ir_node *res = _expression_to_firm(expression);
2844         res          = create_conv(NULL, res, mode_b);
2845
2846         return res;
2847 }
2848
2849 /**
2850  * create a short-circuit expression evaluation that tries to construct
2851  * efficient control flow structures for &&, || and ! expressions
2852  */
2853 static void create_condition_evaluation(const expression_t *expression,
2854                                         ir_node *true_block,
2855                                         ir_node *false_block)
2856 {
2857         switch(expression->kind) {
2858         case EXPR_UNARY_NOT: {
2859                 const unary_expression_t *unary_expression = &expression->unary;
2860                 create_condition_evaluation(unary_expression->value, false_block,
2861                                             true_block);
2862                 return;
2863         }
2864         case EXPR_BINARY_LOGICAL_AND: {
2865                 const binary_expression_t *binary_expression = &expression->binary;
2866
2867                 ir_node *cur_block   = get_cur_block();
2868                 ir_node *extra_block = new_immBlock();
2869                 set_cur_block(cur_block);
2870                 create_condition_evaluation(binary_expression->left, extra_block,
2871                                             false_block);
2872                 mature_immBlock(extra_block);
2873                 set_cur_block(extra_block);
2874                 create_condition_evaluation(binary_expression->right, true_block,
2875                                             false_block);
2876                 return;
2877         }
2878         case EXPR_BINARY_LOGICAL_OR: {
2879                 const binary_expression_t *binary_expression = &expression->binary;
2880
2881                 ir_node *cur_block   = get_cur_block();
2882                 ir_node *extra_block = new_immBlock();
2883                 set_cur_block(cur_block);
2884                 create_condition_evaluation(binary_expression->left, true_block,
2885                                             extra_block);
2886                 mature_immBlock(extra_block);
2887                 set_cur_block(extra_block);
2888                 create_condition_evaluation(binary_expression->right, true_block,
2889                                             false_block);
2890                 return;
2891         }
2892         default:
2893                 break;
2894         }
2895
2896         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2897         ir_node  *condition  = expression_to_modeb(expression);
2898         ir_node  *cond       = new_d_Cond(dbgi, condition);
2899         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2900         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2901
2902         /* set branch prediction info based on __builtin_expect */
2903         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2904                 long               cnst = fold_constant(expression->binary.right);
2905                 cond_jmp_predicate pred;
2906
2907                 if(cnst == 0) {
2908                         pred = COND_JMP_PRED_FALSE;
2909                 } else {
2910                         pred = COND_JMP_PRED_TRUE;
2911                 }
2912                 set_Cond_jmp_pred(cond, pred);
2913         }
2914
2915         add_immBlock_pred(true_block, true_proj);
2916         add_immBlock_pred(false_block, false_proj);
2917
2918         set_cur_block(NULL);
2919 }
2920
2921
2922
2923 static void create_declaration_entity(declaration_t *declaration,
2924                                       declaration_kind_t declaration_kind,
2925                                       ir_type *parent_type)
2926 {
2927         ident     *const id     = new_id_from_str(declaration->symbol->string);
2928         type_t    *const type   = skip_typeref(declaration->type);
2929         ir_type   *const irtype = get_ir_type(type);
2930         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2931         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2932         mangle_ent_from_decl(entity, declaration);
2933
2934         declaration->declaration_kind = (unsigned char) declaration_kind;
2935         declaration->v.entity         = entity;
2936         set_entity_variability(entity, variability_uninitialized);
2937         if(parent_type == get_tls_type())
2938                 set_entity_allocation(entity, allocation_automatic);
2939         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2940                 set_entity_allocation(entity, allocation_static);
2941
2942         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
2943                 set_entity_volatility(entity, volatility_is_volatile);
2944         }
2945 }
2946
2947
2948 typedef struct type_path_entry_t type_path_entry_t;
2949 struct type_path_entry_t {
2950         type_t           *type;
2951         ir_initializer_t *initializer;
2952         size_t            index;
2953         declaration_t    *compound_entry;
2954 };
2955
2956 typedef struct type_path_t type_path_t;
2957 struct type_path_t {
2958         type_path_entry_t *path;
2959         type_t            *top_type;
2960         bool               invalid;
2961 };
2962
2963 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2964 {
2965         size_t len = ARR_LEN(path->path);
2966
2967         for(size_t i = 0; i < len; ++i) {
2968                 const type_path_entry_t *entry = & path->path[i];
2969
2970                 type_t *type = skip_typeref(entry->type);
2971                 if(is_type_compound(type)) {
2972                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2973                 } else if(is_type_array(type)) {
2974                         fprintf(stderr, "[%zd]", entry->index);
2975                 } else {
2976                         fprintf(stderr, "-INVALID-");
2977                 }
2978         }
2979         fprintf(stderr, "  (");
2980         print_type(path->top_type);
2981         fprintf(stderr, ")");
2982 }
2983
2984 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2985 {
2986         size_t len = ARR_LEN(path->path);
2987         assert(len > 0);
2988         return & path->path[len-1];
2989 }
2990
2991 static type_path_entry_t *append_to_type_path(type_path_t *path)
2992 {
2993         size_t len = ARR_LEN(path->path);
2994         ARR_RESIZE(type_path_entry_t, path->path, len+1);
2995
2996         type_path_entry_t *result = & path->path[len];
2997         memset(result, 0, sizeof(result[0]));
2998         return result;
2999 }
3000
3001 static size_t get_compound_size(const compound_type_t *type)
3002 {
3003         declaration_t *declaration = type->declaration;
3004         declaration_t *member      = declaration->scope.declarations;
3005         size_t         size        = 0;
3006         for( ; member != NULL; member = member->next) {
3007                 ++size;
3008         }
3009         /* TODO: cache results? */
3010
3011         return size;
3012 }
3013
3014 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3015 {
3016         type_t *orig_top_type = path->top_type;
3017         type_t *top_type      = skip_typeref(orig_top_type);
3018
3019         assert(is_type_compound(top_type) || is_type_array(top_type));
3020
3021         if(ARR_LEN(path->path) == 0) {
3022                 return NULL;
3023         } else {
3024                 type_path_entry_t *top         = get_type_path_top(path);
3025                 ir_initializer_t  *initializer = top->initializer;
3026                 return get_initializer_compound_value(initializer, top->index);
3027         }
3028 }
3029
3030 static void descend_into_subtype(type_path_t *path)
3031 {
3032         type_t *orig_top_type = path->top_type;
3033         type_t *top_type      = skip_typeref(orig_top_type);
3034
3035         assert(is_type_compound(top_type) || is_type_array(top_type));
3036
3037         ir_initializer_t *initializer = get_initializer_entry(path);
3038
3039         type_path_entry_t *top = append_to_type_path(path);
3040         top->type              = top_type;
3041
3042         size_t len;
3043
3044         if(is_type_compound(top_type)) {
3045                 declaration_t *declaration = top_type->compound.declaration;
3046                 declaration_t *entry       = declaration->scope.declarations;
3047
3048                 top->compound_entry = entry;
3049                 top->index          = 0;
3050                 len                 = get_compound_size(&top_type->compound);
3051                 if(entry != NULL)
3052                         path->top_type = entry->type;
3053         } else {
3054                 assert(is_type_array(top_type));
3055                 assert(top_type->array.size > 0);
3056
3057                 top->index     = 0;
3058                 path->top_type = top_type->array.element_type;
3059                 len            = top_type->array.size;
3060         }
3061         if(initializer == NULL
3062                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3063                 initializer = create_initializer_compound(len);
3064                 /* we have to set the entry at the 2nd latest path entry... */
3065                 size_t path_len = ARR_LEN(path->path);
3066                 assert(path_len >= 1);
3067                 if(path_len > 1) {
3068                         type_path_entry_t *entry        = & path->path[path_len-2];
3069                         ir_initializer_t  *tinitializer = entry->initializer;
3070                         set_initializer_compound_value(tinitializer, entry->index,
3071                                                        initializer);
3072                 }
3073         }
3074         top->initializer = initializer;
3075 }
3076
3077 static void ascend_from_subtype(type_path_t *path)
3078 {
3079         type_path_entry_t *top = get_type_path_top(path);
3080
3081         path->top_type = top->type;
3082
3083         size_t len = ARR_LEN(path->path);
3084         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3085 }
3086
3087 static void walk_designator(type_path_t *path, const designator_t *designator)
3088 {
3089         /* designators start at current object type */
3090         ARR_RESIZE(type_path_entry_t, path->path, 1);
3091
3092         for( ; designator != NULL; designator = designator->next) {
3093                 type_path_entry_t *top         = get_type_path_top(path);
3094                 type_t            *orig_type   = top->type;
3095                 type_t            *type        = skip_typeref(orig_type);
3096
3097                 if(designator->symbol != NULL) {
3098                         assert(is_type_compound(type));
3099                         size_t    index  = 0;
3100                         symbol_t *symbol = designator->symbol;
3101
3102                         declaration_t *declaration = type->compound.declaration;
3103                         declaration_t *iter        = declaration->scope.declarations;
3104                         for( ; iter != NULL; iter = iter->next, ++index) {
3105                                 if(iter->symbol == symbol) {
3106                                         break;
3107                                 }
3108                         }
3109                         assert(iter != NULL);
3110
3111                         top->type           = orig_type;
3112                         top->compound_entry = iter;
3113                         top->index          = index;
3114                         orig_type           = iter->type;
3115                 } else {
3116                         expression_t *array_index = designator->array_index;
3117                         assert(designator->array_index != NULL);
3118                         assert(is_type_array(type));
3119                         assert(is_type_valid(array_index->base.type));
3120
3121                         long index = fold_constant(array_index);
3122                         assert(index >= 0);
3123 #ifndef NDEBUG
3124                         if(type->array.size_constant == 1) {
3125                                 long array_size = type->array.size;
3126                                 assert(index < array_size);
3127                         }
3128 #endif
3129
3130                         top->type  = orig_type;
3131                         top->index = (size_t) index;
3132                         orig_type  = type->array.element_type;
3133                 }
3134                 path->top_type = orig_type;
3135
3136                 if(designator->next != NULL) {
3137                         descend_into_subtype(path);
3138                 }
3139         }
3140
3141         path->invalid  = false;
3142 }
3143
3144 static void advance_current_object(type_path_t *path)
3145 {
3146         if(path->invalid) {
3147                 /* TODO: handle this... */
3148                 panic("invalid initializer in ast2firm (excessive elements)");
3149                 return;
3150         }
3151
3152         type_path_entry_t *top = get_type_path_top(path);
3153
3154         type_t *type = skip_typeref(top->type);
3155         if(is_type_union(type)) {
3156                 top->compound_entry = NULL;
3157         } else if(is_type_struct(type)) {
3158                 declaration_t *entry = top->compound_entry;
3159
3160                 top->index++;
3161                 entry               = entry->next;
3162                 top->compound_entry = entry;
3163                 if(entry != NULL) {
3164                         path->top_type = entry->type;
3165                         return;
3166                 }
3167         } else {
3168                 assert(is_type_array(type));
3169
3170                 top->index++;
3171                 if(!type->array.size_constant || top->index < type->array.size) {
3172                         return;
3173                 }
3174         }
3175
3176         /* we're past the last member of the current sub-aggregate, try if we
3177          * can ascend in the type hierarchy and continue with another subobject */
3178         size_t len = ARR_LEN(path->path);
3179
3180         if(len > 1) {
3181                 ascend_from_subtype(path);
3182                 advance_current_object(path);
3183         } else {
3184                 path->invalid = true;
3185         }
3186 }
3187
3188
3189 static ir_initializer_t *create_ir_initializer(
3190                 const initializer_t *initializer, type_t *type);
3191
3192 static ir_initializer_t *create_ir_initializer_value(
3193                 const initializer_value_t *initializer)
3194 {
3195         ir_node *value = expression_to_firm(initializer->value);
3196         return create_initializer_const(value);
3197 }
3198
3199 static ir_initializer_t *create_ir_initializer_list(
3200                 const initializer_list_t *initializer, type_t *type)
3201 {
3202         type_path_t path;
3203         memset(&path, 0, sizeof(path));
3204         path.top_type = type;
3205         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3206
3207         descend_into_subtype(&path);
3208
3209         for(size_t i = 0; i < initializer->len; ++i) {
3210                 const initializer_t *sub_initializer = initializer->initializers[i];
3211
3212                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3213                         walk_designator(&path, sub_initializer->designator.designator);
3214                         continue;
3215                 }
3216
3217                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3218                         /* we might have to descend into types until we're at a scalar
3219                          * type */
3220                         while(true) {
3221                                 type_t *orig_top_type = path.top_type;
3222                                 type_t *top_type      = skip_typeref(orig_top_type);
3223
3224                                 if(is_type_scalar(top_type))
3225                                         break;
3226                                 descend_into_subtype(&path);
3227                         }
3228                 }
3229
3230                 ir_initializer_t *sub_irinitializer
3231                         = create_ir_initializer(sub_initializer, path.top_type);
3232
3233                 size_t path_len = ARR_LEN(path.path);
3234                 assert(path_len >= 1);
3235                 type_path_entry_t *entry        = & path.path[path_len-1];
3236                 ir_initializer_t  *tinitializer = entry->initializer;
3237                 set_initializer_compound_value(tinitializer, entry->index,
3238                                                sub_irinitializer);
3239
3240                 advance_current_object(&path);
3241         }
3242
3243         assert(ARR_LEN(path.path) >= 1);
3244         ir_initializer_t *result = path.path[0].initializer;
3245         DEL_ARR_F(path.path);
3246
3247         return result;
3248 }
3249
3250 static ir_initializer_t *create_ir_initializer_string(
3251                 const initializer_string_t *initializer, type_t *type)
3252 {
3253         type = skip_typeref(type);
3254
3255         size_t            string_len    = initializer->string.size;
3256         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3257         size_t            len           = type->array.size;
3258         ir_initializer_t *irinitializer = create_initializer_compound(len);
3259
3260         const char *string = initializer->string.begin;
3261         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3262
3263         for(size_t i = 0; i < len; ++i) {
3264                 char c = 0;
3265                 if(i < string_len)
3266                         c = string[i];
3267
3268                 tarval           *tv = new_tarval_from_long(string[i], mode);
3269                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3270
3271                 set_initializer_compound_value(irinitializer, i, char_initializer);
3272         }
3273
3274         return irinitializer;
3275 }
3276
3277 static ir_initializer_t *create_ir_initializer_wide_string(
3278                 const initializer_wide_string_t *initializer, type_t *type)
3279 {
3280         size_t            string_len    = initializer->string.size;
3281         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3282         size_t            len           = type->array.size;
3283         ir_initializer_t *irinitializer = create_initializer_compound(len);
3284
3285         const wchar_rep_t *string = initializer->string.begin;
3286         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3287
3288         for(size_t i = 0; i < len; ++i) {
3289                 wchar_rep_t c = 0;
3290                 if(i < string_len) {
3291                         c = string[i];
3292                 }
3293                 tarval *tv = new_tarval_from_long(string[i], mode);
3294                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3295
3296                 set_initializer_compound_value(irinitializer, i, char_initializer);
3297         }
3298
3299         return irinitializer;
3300 }
3301
3302 static ir_initializer_t *create_ir_initializer(
3303                 const initializer_t *initializer, type_t *type)
3304 {
3305         switch(initializer->kind) {
3306                 case INITIALIZER_STRING:
3307                         return create_ir_initializer_string(&initializer->string, type);
3308
3309                 case INITIALIZER_WIDE_STRING:
3310                         return create_ir_initializer_wide_string(&initializer->wide_string,
3311                                                                  type);
3312
3313                 case INITIALIZER_LIST:
3314                         return create_ir_initializer_list(&initializer->list, type);
3315
3316                 case INITIALIZER_VALUE:
3317                         return create_ir_initializer_value(&initializer->value);
3318
3319                 case INITIALIZER_DESIGNATOR:
3320                         panic("unexpected designator initializer found");
3321         }
3322         panic("unknown initializer");
3323 }
3324
3325 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3326                                             ir_node *base_addr)
3327 {
3328         ir_mode *mode = get_type_mode(type);
3329         tarval  *zero = get_mode_null(mode);
3330         ir_node *cnst = new_d_Const(dbgi, mode, zero);
3331
3332         /* TODO: bitfields */
3333         ir_node *mem    = get_store();
3334         ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3335         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3336         set_store(proj_m);
3337 }
3338
3339 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3340                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3341 {
3342         switch(get_initializer_kind(initializer)) {
3343         case IR_INITIALIZER_NULL: {
3344                 /* TODO: implement this for compound types... */
3345                 assert(type != NULL);
3346
3347                 ir_mode *mode = get_type_mode(type);
3348                 tarval  *zero = get_mode_null(mode);
3349                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3350
3351                 /* TODO: bitfields */
3352                 ir_node *mem    = get_store();
3353                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3354                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3355                 set_store(proj_m);
3356                 return;
3357         }
3358         case IR_INITIALIZER_CONST: {
3359                 ir_node *node = get_initializer_const_value(initializer);
3360                 ir_mode *mode = get_irn_mode(node);
3361                 assert(get_type_mode(type) == mode);
3362
3363                 /* TODO: bitfields... */
3364                 ir_node *mem    = get_store();
3365                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3366                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3367                 set_store(proj_m);
3368                 return;
3369         }
3370         case IR_INITIALIZER_TARVAL: {
3371                 tarval  *tv   = get_initializer_tarval_value(initializer);
3372                 ir_mode *mode = get_tarval_mode(tv);
3373                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3374                 assert(get_type_mode(type) == mode);
3375
3376                 /* TODO: bitfields... */
3377                 ir_node *mem    = get_store();
3378                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3379                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3380                 set_store(proj_m);
3381                 return;
3382         }
3383         case IR_INITIALIZER_COMPOUND: {
3384                 assert(is_compound_type(type));
3385                 int n_members;
3386                 if(is_Array_type(type)) {
3387                         assert(has_array_upper_bound(type, 0));
3388                         n_members = get_array_upper_bound_int(type, 0);
3389                 } else {
3390                         n_members = get_compound_n_members(type);
3391                 }
3392
3393                 if(get_initializer_compound_n_entries(initializer)
3394                                 != (unsigned) n_members)
3395                         panic("initializer doesn't match compound type");
3396
3397                 for(int i = 0; i < n_members; ++i) {
3398                         ir_node *addr;
3399                         ir_type *irtype;
3400                         if(is_Array_type(type)) {
3401                                 ir_entity *entity   = get_array_element_entity(type);
3402                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3403                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3404                                 ir_node   *in[1]    = { cnst };
3405                                 irtype = get_array_element_type(type);
3406                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3407                         } else {
3408                                 ir_entity *member = get_compound_member(type, i);
3409
3410                                 irtype = get_entity_type(member);
3411                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3412                         }
3413
3414                         ir_initializer_t *sub_init
3415                                 = get_initializer_compound_value(initializer, i);
3416
3417                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3418                 }
3419                 return;
3420         }
3421         }
3422
3423         panic("invalid IR_INITIALIZER found");
3424 }
3425
3426 static void create_dynamic_initializer(ir_initializer_t *initializer,
3427                 dbg_info *dbgi, ir_entity *entity)
3428 {
3429         ir_node *frame     = get_local_frame(entity);
3430         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3431         ir_type *type      = get_entity_type(entity);
3432
3433         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3434 }
3435
3436 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3437                                      ir_entity *entity, type_t *type)
3438 {
3439         ir_node *memory = get_store();
3440         ir_node *nomem  = new_NoMem();
3441         ir_node *frame  = get_irg_frame(current_ir_graph);
3442         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3443
3444         if(initializer->kind == INITIALIZER_VALUE) {
3445                 initializer_value_t *initializer_value = &initializer->value;
3446
3447                 ir_node *value = expression_to_firm(initializer_value->value);
3448                 type = skip_typeref(type);
3449                 assign_value(dbgi, addr, type, value);
3450                 return;
3451         }
3452
3453         if(!is_constant_initializer(initializer)) {
3454                 ir_initializer_t *irinitializer
3455                         = create_ir_initializer(initializer, type);
3456
3457                 create_dynamic_initializer(irinitializer, dbgi, entity);
3458                 return;
3459         }
3460
3461         /* create the ir_initializer */
3462         ir_graph *const old_current_ir_graph = current_ir_graph;
3463         current_ir_graph = get_const_code_irg();
3464
3465         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3466
3467         assert(current_ir_graph == get_const_code_irg());
3468         current_ir_graph = old_current_ir_graph;
3469
3470         /* create a "template" entity which is copied to the entity on the stack */
3471         ident     *const id          = unique_ident("initializer");
3472         ir_type   *const irtype      = get_ir_type(type);
3473         ir_type   *const global_type = get_glob_type();
3474         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3475         set_entity_ld_ident(init_entity, id);
3476
3477         set_entity_variability(init_entity, variability_initialized);
3478         set_entity_visibility(init_entity, visibility_local);
3479         set_entity_allocation(init_entity, allocation_static);
3480
3481         set_entity_initializer(init_entity, irinitializer);
3482
3483         ir_node *const src_addr = create_global(dbgi, mode_P_data, init_entity);
3484         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3485
3486         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3487         set_store(copyb_mem);
3488 }
3489
3490 static void create_initializer_local_variable_entity(declaration_t *declaration)
3491 {
3492         initializer_t *initializer = declaration->init.initializer;
3493         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3494         ir_entity     *entity      = declaration->v.entity;
3495         type_t        *type        = declaration->type;
3496         create_local_initializer(initializer, dbgi, entity, type);
3497 }
3498
3499 static void create_declaration_initializer(declaration_t *declaration)
3500 {
3501         initializer_t *initializer = declaration->init.initializer;
3502         if(initializer == NULL)
3503                 return;
3504
3505         declaration_kind_t declaration_kind
3506                 = (declaration_kind_t) declaration->declaration_kind;
3507         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3508                 create_initializer_local_variable_entity(declaration);
3509                 return;
3510         }
3511
3512         if(initializer->kind == INITIALIZER_VALUE) {
3513                 initializer_value_t *initializer_value = &initializer->value;
3514
3515                 ir_node *value = expression_to_firm(initializer_value->value);
3516
3517                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3518                         set_value(declaration->v.value_number, value);
3519                 } else {
3520                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3521
3522                         ir_entity *entity = declaration->v.entity;
3523
3524                         set_entity_variability(entity, variability_initialized);
3525                         set_atomic_ent_value(entity, value);
3526                 }
3527         } else {
3528                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3529                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3530
3531                 ir_entity        *entity        = declaration->v.entity;
3532                 ir_initializer_t *irinitializer
3533                         = create_ir_initializer(initializer, declaration->type);
3534
3535                 set_entity_variability(entity, variability_initialized);
3536                 set_entity_initializer(entity, irinitializer);
3537         }
3538 }
3539
3540 static void create_variable_length_array(declaration_t *declaration)
3541 {
3542         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3543         type_t   *type      = declaration->type;
3544         ir_node  *mem       = get_store();
3545         ir_type  *el_type   = get_ir_type(type->array.element_type);
3546
3547         /* make sure size_node is calculated */
3548         get_type_size(type);
3549         ir_node  *elems = type->array.size_node;
3550         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3551
3552         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3553         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3554         set_store(proj_m);
3555
3556         /* initializers are not allowed for VLAs */
3557         assert(declaration->init.initializer == NULL);
3558
3559         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3560         declaration->v.vla_base       = addr;
3561
3562         /* TODO: record VLA somewhere so we create the free node when we leave
3563          * it's scope */
3564 }
3565
3566 /**
3567  * Creates a Firm local variable from a declaration.
3568  */
3569 static void create_local_variable(declaration_t *declaration)
3570 {
3571         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3572
3573         bool needs_entity = declaration->address_taken;
3574         type_t *type = skip_typeref(declaration->type);
3575
3576         /* is it a variable length array? */
3577         if(is_type_array(type) && !type->array.size_constant) {
3578                 create_variable_length_array(declaration);
3579                 return;
3580         } else if(is_type_array(type) || is_type_compound(type)) {
3581                 needs_entity = true;
3582         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3583                 needs_entity = true;
3584         }
3585
3586         if(needs_entity) {
3587                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3588                 create_declaration_entity(declaration,
3589                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3590                                           frame_type);
3591         } else {
3592                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3593                 declaration->v.value_number   = next_value_number_function;
3594                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3595                 ++next_value_number_function;
3596         }
3597
3598         create_declaration_initializer(declaration);
3599 }
3600
3601 static void create_local_static_variable(declaration_t *declaration)
3602 {
3603         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3604
3605         type_t    *const type        = skip_typeref(declaration->type);
3606         ir_type   *const global_type = get_glob_type();
3607         ident     *const id          = unique_ident(declaration->symbol->string);
3608         ir_type   *const irtype      = get_ir_type(type);
3609         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3610         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3611         mangle_ent_from_decl(entity, declaration);
3612
3613         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3614                 set_entity_volatility(entity, volatility_is_volatile);
3615         }
3616
3617         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3618         declaration->v.entity         = entity;
3619         set_entity_variability(entity, variability_uninitialized);
3620         set_entity_visibility(entity, visibility_local);
3621         set_entity_allocation(entity, allocation_static);
3622
3623         ir_graph *const old_current_ir_graph = current_ir_graph;
3624         current_ir_graph = get_const_code_irg();
3625
3626         create_declaration_initializer(declaration);
3627
3628         assert(current_ir_graph == get_const_code_irg());
3629         current_ir_graph = old_current_ir_graph;
3630 }
3631
3632
3633
3634 static void return_statement_to_firm(return_statement_t *statement)
3635 {
3636         if(get_cur_block() == NULL)
3637                 return;
3638
3639         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3640         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3641
3642
3643         ir_node *in[1];
3644         int      in_len;
3645         if(get_method_n_ress(func_irtype) > 0) {
3646                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3647
3648                 if(statement->value != NULL) {
3649                         ir_node *node = expression_to_firm(statement->value);
3650                         node  = do_strict_conv(dbgi, node);
3651                         in[0] = node;
3652                 } else {
3653                         ir_mode *mode;
3654                         if(is_compound_type(res_type)) {
3655                                 mode = mode_P_data;
3656                         } else {
3657                                 mode = get_type_mode(res_type);
3658                         }
3659                         in[0] = new_Unknown(mode);
3660                 }
3661                 in_len = 1;
3662         } else {
3663                 /* build return_value for its side effects */
3664                 if(statement->value != NULL) {
3665                         expression_to_firm(statement->value);
3666                 }
3667                 in_len = 0;
3668         }
3669
3670         ir_node  *store = get_store();
3671         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3672
3673         ir_node *end_block = get_irg_end_block(current_ir_graph);
3674         add_immBlock_pred(end_block, ret);
3675
3676         set_cur_block(NULL);
3677 }
3678
3679 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3680 {
3681         if(get_cur_block() == NULL)
3682                 return NULL;
3683
3684         return expression_to_firm(statement->expression);
3685 }
3686
3687 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3688 {
3689         ir_node     *result    = NULL;
3690         statement_t *statement = compound->statements;
3691         for( ; statement != NULL; statement = statement->base.next) {
3692                 //context2firm(&statement->scope);
3693
3694                 if(statement->base.next == NULL
3695                                 && statement->kind == STATEMENT_EXPRESSION) {
3696                         result = expression_statement_to_firm(
3697                                         &statement->expression);
3698                         break;
3699                 }
3700                 statement_to_firm(statement);
3701         }
3702
3703         return result;
3704 }
3705
3706 static void create_global_variable(declaration_t *declaration)
3707 {
3708         ir_visibility  vis;
3709         ir_type       *var_type;
3710         switch ((storage_class_tag_t)declaration->storage_class) {
3711                 case STORAGE_CLASS_STATIC:
3712                         vis = visibility_local;
3713                         goto global_var;
3714
3715                 case STORAGE_CLASS_EXTERN:
3716                         vis = visibility_external_allocated;
3717                         goto global_var;
3718
3719                 case STORAGE_CLASS_NONE:
3720                         vis = visibility_external_visible;
3721                         goto global_var;
3722
3723                 case STORAGE_CLASS_THREAD:
3724                         vis = visibility_external_visible;
3725                         goto tls_var;
3726
3727                 case STORAGE_CLASS_THREAD_EXTERN:
3728                         vis = visibility_external_allocated;
3729                         goto tls_var;
3730
3731                 case STORAGE_CLASS_THREAD_STATIC:
3732                         vis = visibility_local;
3733                         goto tls_var;
3734
3735 tls_var:
3736                         var_type = get_tls_type();
3737                         goto create_var;
3738
3739 global_var:
3740                         var_type = get_glob_type();
3741                         goto create_var;
3742
3743 create_var:
3744                         create_declaration_entity(declaration,
3745                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3746                                                   var_type);
3747                         set_entity_visibility(declaration->v.entity, vis);
3748
3749                         return;
3750
3751                 case STORAGE_CLASS_TYPEDEF:
3752                 case STORAGE_CLASS_AUTO:
3753                 case STORAGE_CLASS_REGISTER:
3754                 case STORAGE_CLASS_ENUM_ENTRY:
3755                         break;
3756         }
3757         panic("Invalid storage class for global variable");
3758 }
3759
3760 static void create_local_declaration(declaration_t *declaration)
3761 {
3762         if(declaration->symbol == NULL)
3763                 return;
3764
3765         type_t *type = skip_typeref(declaration->type);
3766
3767         switch ((storage_class_tag_t) declaration->storage_class) {
3768         case STORAGE_CLASS_STATIC:
3769                 create_local_static_variable(declaration);
3770                 return;
3771         case STORAGE_CLASS_EXTERN:
3772                 create_global_variable(declaration);
3773                 create_declaration_initializer(declaration);
3774                 return;
3775         case STORAGE_CLASS_NONE:
3776         case STORAGE_CLASS_AUTO:
3777         case STORAGE_CLASS_REGISTER:
3778                 if(is_type_function(type)) {
3779                         if(declaration->init.statement != NULL) {
3780                                 panic("nested functions not supported yet");
3781                         } else {
3782                                 get_function_entity(declaration);
3783                         }
3784                 } else {
3785                         create_local_variable(declaration);
3786                 }
3787                 return;
3788         case STORAGE_CLASS_ENUM_ENTRY:
3789         case STORAGE_CLASS_TYPEDEF:
3790         case STORAGE_CLASS_THREAD:
3791         case STORAGE_CLASS_THREAD_EXTERN:
3792         case STORAGE_CLASS_THREAD_STATIC:
3793                 return;
3794         }
3795         panic("invalid storage class found");
3796 }
3797
3798 static void declaration_statement_to_firm(declaration_statement_t *statement)
3799 {
3800         declaration_t *declaration = statement->declarations_begin;
3801         declaration_t *end         = statement->declarations_end->next;
3802         for( ; declaration != end; declaration = declaration->next) {
3803                 if(declaration->namespc != NAMESPACE_NORMAL)
3804                         continue;
3805                 create_local_declaration(declaration);
3806         }
3807 }
3808
3809 static void if_statement_to_firm(if_statement_t *statement)
3810 {
3811         ir_node *cur_block = get_cur_block();
3812
3813         ir_node *fallthrough_block = new_immBlock();
3814
3815         /* the true (blocks) */
3816         ir_node *true_block;
3817         if (statement->true_statement != NULL) {
3818                 true_block = new_immBlock();
3819                 statement_to_firm(statement->true_statement);
3820                 if(get_cur_block() != NULL) {
3821                         ir_node *jmp = new_Jmp();
3822                         add_immBlock_pred(fallthrough_block, jmp);
3823                 }
3824         } else {
3825                 true_block = fallthrough_block;
3826         }
3827
3828         /* the false (blocks) */
3829         ir_node *false_block;
3830         if(statement->false_statement != NULL) {
3831                 false_block = new_immBlock();
3832
3833                 statement_to_firm(statement->false_statement);
3834                 if(get_cur_block() != NULL) {
3835                         ir_node *jmp = new_Jmp();
3836                         add_immBlock_pred(fallthrough_block, jmp);
3837                 }
3838         } else {
3839                 false_block = fallthrough_block;
3840         }
3841
3842         /* create the condition */
3843         if(cur_block != NULL) {
3844                 set_cur_block(cur_block);
3845                 create_condition_evaluation(statement->condition, true_block,
3846                                             false_block);
3847         }
3848
3849         mature_immBlock(true_block);
3850         if(false_block != fallthrough_block) {
3851                 mature_immBlock(false_block);
3852         }
3853         mature_immBlock(fallthrough_block);
3854
3855         set_cur_block(fallthrough_block);
3856 }
3857
3858 static void while_statement_to_firm(while_statement_t *statement)
3859 {
3860         ir_node *jmp = NULL;
3861         if(get_cur_block() != NULL) {
3862                 jmp = new_Jmp();
3863         }
3864
3865         /* create the header block */
3866         ir_node *header_block = new_immBlock();
3867         if(jmp != NULL) {
3868                 add_immBlock_pred(header_block, jmp);
3869         }
3870
3871         /* the false block */
3872         ir_node *false_block = new_immBlock();
3873
3874         /* the loop body */
3875         ir_node *body_block;
3876         if (statement->body != NULL) {
3877                 ir_node *old_continue_label = continue_label;
3878                 ir_node *old_break_label    = break_label;
3879                 continue_label              = header_block;
3880                 break_label                 = false_block;
3881
3882                 body_block = new_immBlock();
3883                 statement_to_firm(statement->body);
3884
3885                 assert(continue_label == header_block);
3886                 assert(break_label    == false_block);
3887                 continue_label = old_continue_label;
3888                 break_label    = old_break_label;
3889
3890                 if(get_cur_block() != NULL) {
3891                         jmp = new_Jmp();
3892                         add_immBlock_pred(header_block, jmp);
3893                 }
3894         } else {
3895                 body_block = header_block;
3896         }
3897
3898         /* create the condition */
3899         set_cur_block(header_block);
3900
3901         create_condition_evaluation(statement->condition, body_block, false_block);
3902         mature_immBlock(body_block);
3903         mature_immBlock(false_block);
3904         mature_immBlock(header_block);
3905
3906         set_cur_block(false_block);
3907 }
3908
3909 static void do_while_statement_to_firm(do_while_statement_t *statement)
3910 {
3911         ir_node *jmp = NULL;
3912         if(get_cur_block() != NULL) {
3913                 jmp = new_Jmp();
3914         }
3915
3916         /* create the header block */
3917         ir_node *header_block = new_immBlock();
3918
3919         /* the false block */
3920         ir_node *false_block = new_immBlock();
3921
3922         /* the loop body */
3923         ir_node *body_block = new_immBlock();
3924         if(jmp != NULL) {
3925                 add_immBlock_pred(body_block, jmp);
3926         }
3927
3928         if (statement->body != NULL) {
3929                 ir_node *old_continue_label = continue_label;
3930                 ir_node *old_break_label    = break_label;
3931                 continue_label              = header_block;
3932                 break_label                 = false_block;
3933
3934                 statement_to_firm(statement->body);
3935
3936                 assert(continue_label == header_block);
3937                 assert(break_label    == false_block);
3938                 continue_label = old_continue_label;
3939                 break_label    = old_break_label;
3940
3941                 if (get_cur_block() == NULL) {
3942                         mature_immBlock(header_block);
3943                         mature_immBlock(body_block);
3944                         mature_immBlock(false_block);
3945                         return;
3946                 }
3947         }
3948
3949         ir_node *body_jmp = new_Jmp();
3950         add_immBlock_pred(header_block, body_jmp);
3951         mature_immBlock(header_block);
3952
3953         /* create the condition */
3954         set_cur_block(header_block);
3955
3956         create_condition_evaluation(statement->condition, body_block, false_block);
3957         mature_immBlock(body_block);
3958         mature_immBlock(false_block);
3959         mature_immBlock(header_block);
3960
3961         set_cur_block(false_block);
3962 }
3963
3964 static void for_statement_to_firm(for_statement_t *statement)
3965 {
3966         ir_node *jmp = NULL;
3967         if (get_cur_block() != NULL) {
3968                 if(statement->initialisation != NULL) {
3969                         expression_to_firm(statement->initialisation);
3970                 }
3971
3972                 /* create declarations */
3973                 declaration_t *declaration = statement->scope.declarations;
3974                 for( ; declaration != NULL; declaration = declaration->next) {
3975                         create_local_declaration(declaration);
3976                 }
3977
3978                 jmp = new_Jmp();
3979         }
3980
3981
3982         /* create the step block */
3983         ir_node *const step_block = new_immBlock();
3984         if (statement->step != NULL) {
3985                 expression_to_firm(statement->step);
3986         }
3987         ir_node *const step_jmp = new_Jmp();
3988
3989         /* create the header block */
3990         ir_node *const header_block = new_immBlock();
3991         if (jmp != NULL) {
3992                 add_immBlock_pred(header_block, jmp);
3993         }
3994         add_immBlock_pred(header_block, step_jmp);
3995
3996         /* the false block */
3997         ir_node *const false_block = new_immBlock();
3998
3999         /* the loop body */
4000         ir_node * body_block;
4001         if (statement->body != NULL) {
4002                 ir_node *const old_continue_label = continue_label;
4003                 ir_node *const old_break_label    = break_label;
4004                 continue_label = step_block;
4005                 break_label    = false_block;
4006
4007                 body_block = new_immBlock();
4008                 statement_to_firm(statement->body);
4009
4010                 assert(continue_label == step_block);
4011                 assert(break_label    == false_block);
4012                 continue_label = old_continue_label;
4013                 break_label    = old_break_label;
4014
4015                 if (get_cur_block() != NULL) {
4016                         jmp = new_Jmp();
4017                         add_immBlock_pred(step_block, jmp);
4018                 }
4019         } else {
4020                 body_block = step_block;
4021         }
4022
4023         /* create the condition */
4024         set_cur_block(header_block);
4025         if (statement->condition != NULL) {
4026                 create_condition_evaluation(statement->condition, body_block,
4027                                             false_block);
4028         } else {
4029                 keep_alive(header_block);
4030                 jmp = new_Jmp();
4031                 add_immBlock_pred(body_block, jmp);
4032         }
4033
4034         mature_immBlock(body_block);
4035         mature_immBlock(false_block);
4036         mature_immBlock(step_block);
4037         mature_immBlock(header_block);
4038         mature_immBlock(false_block);
4039
4040         set_cur_block(false_block);
4041 }
4042
4043 static void create_jump_statement(const statement_t *statement,
4044                                   ir_node *target_block)
4045 {
4046         if(get_cur_block() == NULL)
4047                 return;
4048
4049         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4050         ir_node  *jump = new_d_Jmp(dbgi);
4051         add_immBlock_pred(target_block, jump);
4052
4053         set_cur_block(NULL);
4054 }
4055
4056 static void switch_statement_to_firm(const switch_statement_t *statement)
4057 {
4058         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4059
4060         ir_node *expression  = expression_to_firm(statement->expression);
4061         ir_node *cond        = new_d_Cond(dbgi, expression);
4062         ir_node *break_block = new_immBlock();
4063
4064         set_cur_block(NULL);
4065
4066         ir_node *const old_switch_cond       = current_switch_cond;
4067         ir_node *const old_break_label       = break_label;
4068         const bool     old_saw_default_label = saw_default_label;
4069         current_switch_cond                  = cond;
4070         break_label                          = break_block;
4071
4072         if (statement->body != NULL) {
4073                 statement_to_firm(statement->body);
4074         }
4075
4076         if(get_cur_block() != NULL) {
4077                 ir_node *jmp = new_Jmp();
4078                 add_immBlock_pred(break_block, jmp);
4079         }
4080
4081         if (!saw_default_label) {
4082                 set_cur_block(get_nodes_block(cond));
4083                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4084                                                         MAGIC_DEFAULT_PN_NUMBER);
4085                 add_immBlock_pred(break_block, proj);
4086         }
4087
4088         assert(current_switch_cond == cond);
4089         assert(break_label         == break_block);
4090         current_switch_cond = old_switch_cond;
4091         break_label         = old_break_label;
4092         saw_default_label   = old_saw_default_label;
4093
4094         mature_immBlock(break_block);
4095         set_cur_block(break_block);
4096 }
4097
4098 static void case_label_to_firm(const case_label_statement_t *statement)
4099 {
4100         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4101
4102         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4103
4104         /* let's create a node and hope firm constant folding creates a Const
4105          * node... */
4106         ir_node *proj;
4107         ir_node *old_block = get_nodes_block(current_switch_cond);
4108         ir_node *block     = new_immBlock();
4109
4110         set_cur_block(old_block);
4111         if(statement->expression != NULL) {
4112                 long start_pn = fold_constant(statement->expression);
4113                 long end_pn = start_pn;
4114                 if (statement->end_range != NULL) {
4115                         end_pn = fold_constant(statement->end_range);
4116                 }
4117                 assert(start_pn <= end_pn);
4118                 /* create jumps for all cases in the given range */
4119                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4120                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4121                                 /* oops someone detected our cheating... */
4122                                 panic("magic default pn used");
4123                         }
4124                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4125                         add_immBlock_pred(block, proj);
4126                 }
4127         } else {
4128                 saw_default_label = true;
4129                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4130                                          MAGIC_DEFAULT_PN_NUMBER);
4131
4132                 add_immBlock_pred(block, proj);
4133         }
4134
4135         if (fallthrough != NULL) {
4136                 add_immBlock_pred(block, fallthrough);
4137         }
4138         mature_immBlock(block);
4139         set_cur_block(block);
4140
4141         if(statement->statement != NULL) {
4142                 statement_to_firm(statement->statement);
4143         }
4144 }
4145
4146 static ir_node *get_label_block(declaration_t *label)
4147 {
4148         assert(label->namespc == NAMESPACE_LABEL);
4149
4150         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4151                 return label->v.block;
4152         }
4153         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4154
4155         ir_node *old_cur_block = get_cur_block();
4156         ir_node *block         = new_immBlock();
4157         set_cur_block(old_cur_block);
4158
4159         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4160         label->v.block          = block;
4161
4162         ARR_APP1(ir_node *, imature_blocks, block);
4163
4164         return block;
4165 }
4166
4167 static void label_to_firm(const label_statement_t *statement)
4168 {
4169         ir_node *block = get_label_block(statement->label);
4170
4171         if(get_cur_block() != NULL) {
4172                 ir_node *jmp = new_Jmp();
4173                 add_immBlock_pred(block, jmp);
4174         }
4175
4176         set_cur_block(block);
4177         keep_alive(block);
4178
4179         if(statement->statement != NULL) {
4180                 statement_to_firm(statement->statement);
4181         }
4182 }
4183
4184 static void goto_to_firm(const goto_statement_t *statement)
4185 {
4186         if(get_cur_block() == NULL)
4187                 return;
4188
4189         ir_node *block = get_label_block(statement->label);
4190         ir_node *jmp   = new_Jmp();
4191         add_immBlock_pred(block, jmp);
4192
4193         set_cur_block(NULL);
4194 }
4195
4196 typedef enum modifier_t {
4197         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4198         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4199         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4200         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4201 } modifier_t;
4202
4203 static void asm_statement_to_firm(const asm_statement_t *statement)
4204 {
4205         (void) statement;
4206         fprintf(stderr, "WARNING asm not implemented yet!\n");
4207 #if 0
4208         bool needs_memory = false;
4209
4210         size_t         n_clobbers = 0;
4211         asm_clobber_t *clobber    = statement->clobbers;
4212         for( ; clobber != NULL; clobber = clobber->next) {
4213                 if(strcmp(clobber->clobber, "memory") == 0) {
4214                         needs_memory = true;
4215                         continue;
4216                 }
4217
4218                 ident *id = new_id_from_str(clobber->clobber);
4219                 obstack_ptr_grow(&asm_obst, id);
4220                 ++n_clobbers;
4221         }
4222         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4223         ident **clobbers = NULL;
4224         if(n_clobbers > 0) {
4225                 clobbers = obstack_finish(&asm_obst);
4226         }
4227
4228         /* find and count input and output constraints */
4229         asm_constraint_t *constraint = statement->inputs;
4230         for( ; constraint != NULL; constraint = constraint->next) {
4231                 int  modifiers      = 0;
4232                 bool supports_memop = false;
4233                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4234                         /* TODO: improve error messages */
4235                         switch(*c) {
4236                         case '?':
4237                         case '!':
4238                                 panic("multiple alternative assembler constraints not "
4239                                       "supported");
4240                         case 'm':
4241                         case 'o':
4242                         case 'V':
4243                         case '<':
4244                         case '>':
4245                         case 'X':
4246                                 supports_memop = true;
4247                                 obstack_1grow(&asm_obst, *c);
4248                                 break;
4249                         case '=':
4250                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4251                                         panic("inconsistent register constraints");
4252                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4253                                 break;
4254                         case '+':
4255                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4256                                         panic("inconsistent register constraints");
4257                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4258                                 break;
4259                         case '&':
4260                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4261                                 panic("early clobber assembler constraint not supported yet");
4262                                 break;
4263                         case '%':
4264                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4265                                 panic("commutative assembler constraint not supported yet");
4266                                 break;
4267                         case '#':
4268                                 /* skip register preferences stuff... */
4269                                 while(*c != 0 && *c != ',')
4270                                         ++c;
4271                                 break;
4272                         case '*':
4273                                 /* skip register preferences stuff... */
4274                                 ++c;
4275                                 break;
4276                         default:
4277                                 obstack_1grow(&asm_obst, *c);
4278                                 break;
4279                         }
4280                 }
4281                 obstack_1grow(&asm_obst, '\0');
4282                 const char *constraint_string = obstack_finish(&asm_obst);
4283
4284                 needs_memory |= supports_memop;
4285                 if(supports_memop) {
4286
4287                 }
4288         }
4289 #endif
4290 }
4291
4292 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4293         statement_to_firm(statement->try_statement);
4294         warningf(&statement->base.source_position, "structured exception handling ignored");
4295 }
4296
4297 static void     leave_statement_to_firm(leave_statement_t *statement) {
4298         errorf(&statement->base.source_position, "__leave not supported yet");
4299 }
4300
4301 static void statement_to_firm(statement_t *statement)
4302 {
4303         switch(statement->kind) {
4304         case STATEMENT_INVALID:
4305                 panic("invalid statement found");
4306                 return;
4307         case STATEMENT_EMPTY:
4308                 /* nothing */
4309                 return;
4310         case STATEMENT_COMPOUND:
4311                 compound_statement_to_firm(&statement->compound);
4312                 return;
4313         case STATEMENT_RETURN:
4314                 return_statement_to_firm(&statement->returns);
4315                 return;
4316         case STATEMENT_EXPRESSION:
4317                 expression_statement_to_firm(&statement->expression);
4318                 return;
4319         case STATEMENT_IF:
4320                 if_statement_to_firm(&statement->ifs);
4321                 return;
4322         case STATEMENT_WHILE:
4323                 while_statement_to_firm(&statement->whiles);
4324                 return;
4325         case STATEMENT_DO_WHILE:
4326                 do_while_statement_to_firm(&statement->do_while);
4327                 return;
4328         case STATEMENT_DECLARATION:
4329                 declaration_statement_to_firm(&statement->declaration);
4330                 return;
4331         case STATEMENT_BREAK:
4332                 create_jump_statement(statement, break_label);
4333                 return;
4334         case STATEMENT_CONTINUE:
4335                 create_jump_statement(statement, continue_label);
4336                 return;
4337         case STATEMENT_SWITCH:
4338                 switch_statement_to_firm(&statement->switchs);
4339                 return;
4340         case STATEMENT_CASE_LABEL:
4341                 case_label_to_firm(&statement->case_label);
4342                 return;
4343         case STATEMENT_FOR:
4344                 for_statement_to_firm(&statement->fors);
4345                 return;
4346         case STATEMENT_LABEL:
4347                 label_to_firm(&statement->label);
4348                 return;
4349         case STATEMENT_GOTO:
4350                 goto_to_firm(&statement->gotos);
4351                 return;
4352         case STATEMENT_ASM:
4353                 asm_statement_to_firm(&statement->asms);
4354                 return;
4355         case STATEMENT_MS_TRY:
4356                 ms_try_statement_to_firm(&statement->ms_try);
4357                 return;
4358         case STATEMENT_LEAVE:
4359                 leave_statement_to_firm(&statement->leave);
4360                 return;
4361         }
4362         panic("Statement not implemented\n");
4363 }
4364
4365 static int count_decls_in_expression(const expression_t *expression);
4366
4367 static int count_local_declarations(const declaration_t *      decl,
4368                                     const declaration_t *const end)
4369 {
4370         int count = 0;
4371         for (; decl != end; decl = decl->next) {
4372                 if(decl->namespc != NAMESPACE_NORMAL)
4373                         continue;
4374                 const type_t *type = skip_typeref(decl->type);
4375                 if (!decl->address_taken && is_type_scalar(type))
4376                         ++count;
4377                 const initializer_t *initializer = decl->init.initializer;
4378                 /* FIXME: should walk initializer hierarchies... */
4379                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4380                         count += count_decls_in_expression(initializer->value.value);
4381                 }
4382         }
4383         return count;
4384 }
4385
4386 static int count_decls_in_expression(const expression_t *expression) {
4387         int count = 0;
4388
4389         if(expression == NULL)
4390                 return 0;
4391
4392         switch((expression_kind_t) expression->base.kind) {
4393         case EXPR_STATEMENT:
4394                 return count_decls_in_stmts(expression->statement.statement);
4395         EXPR_BINARY_CASES {
4396                 int count_left  = count_decls_in_expression(expression->binary.left);
4397                 int count_right = count_decls_in_expression(expression->binary.right);
4398                 return count_left + count_right;
4399         }
4400         EXPR_UNARY_CASES
4401                 return count_decls_in_expression(expression->unary.value);
4402         case EXPR_CALL: {
4403                 call_argument_t *argument = expression->call.arguments;
4404                 for( ; argument != NULL; argument = argument->next) {
4405                         count += count_decls_in_expression(argument->expression);
4406                 }
4407                 return count;
4408         }
4409
4410         case EXPR_UNKNOWN:
4411         case EXPR_INVALID:
4412                 panic("unexpected expression kind");
4413
4414         case EXPR_COMPOUND_LITERAL:
4415                 /* TODO... */
4416                 break;
4417
4418         case EXPR_CONDITIONAL:
4419                 count += count_decls_in_expression(expression->conditional.condition);
4420                 count += count_decls_in_expression(expression->conditional.true_expression);
4421                 count += count_decls_in_expression(expression->conditional.false_expression);
4422                 return count;
4423
4424         case EXPR_BUILTIN_PREFETCH:
4425                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4426                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4427                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4428                 return count;
4429
4430         case EXPR_BUILTIN_CONSTANT_P:
4431                 count += count_decls_in_expression(expression->builtin_constant.value);
4432                 return count;
4433
4434         case EXPR_SELECT:
4435                 count += count_decls_in_expression(expression->select.compound);
4436                 return count;
4437
4438         case EXPR_ARRAY_ACCESS:
4439                 count += count_decls_in_expression(expression->array_access.array_ref);
4440                 count += count_decls_in_expression(expression->array_access.index);
4441                 return count;
4442
4443         case EXPR_CLASSIFY_TYPE:
4444                 count += count_decls_in_expression(expression->classify_type.type_expression);
4445                 return count;
4446
4447         case EXPR_SIZEOF:
4448         case EXPR_ALIGNOF: {
4449                 expression_t *tp_expression = expression->typeprop.tp_expression;
4450                 if (tp_expression != NULL) {
4451                         count += count_decls_in_expression(tp_expression);
4452                 }
4453                 return count;
4454         }
4455
4456         case EXPR_OFFSETOF:
4457         case EXPR_REFERENCE:
4458         case EXPR_CONST:
4459         case EXPR_CHARACTER_CONSTANT:
4460         case EXPR_WIDE_CHARACTER_CONSTANT:
4461         case EXPR_STRING_LITERAL:
4462         case EXPR_WIDE_STRING_LITERAL:
4463         case EXPR_FUNCNAME:
4464         case EXPR_BUILTIN_SYMBOL:
4465         case EXPR_VA_START:
4466         case EXPR_VA_ARG:
4467                 break;
4468         }
4469
4470         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4471          * (or implement all the missing expressions here/implement a walker)
4472          */
4473
4474         return 0;
4475 }
4476
4477 static int count_decls_in_stmts(const statement_t *stmt)
4478 {
4479         int count = 0;
4480         for (; stmt != NULL; stmt = stmt->base.next) {
4481                 switch (stmt->kind) {
4482                         case STATEMENT_EMPTY:
4483                                 break;
4484
4485                         case STATEMENT_DECLARATION: {
4486                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4487                                 count += count_local_declarations(decl_stmt->declarations_begin,
4488                                                                   decl_stmt->declarations_end->next);
4489                                 break;
4490                         }
4491
4492                         case STATEMENT_COMPOUND: {
4493                                 const compound_statement_t *const comp =
4494                                         &stmt->compound;
4495                                 count += count_decls_in_stmts(comp->statements);
4496                                 break;
4497                         }
4498
4499                         case STATEMENT_IF: {
4500                                 const if_statement_t *const if_stmt = &stmt->ifs;
4501                                 count += count_decls_in_expression(if_stmt->condition);
4502                                 count += count_decls_in_stmts(if_stmt->true_statement);
4503                                 count += count_decls_in_stmts(if_stmt->false_statement);
4504                                 break;
4505                         }
4506
4507                         case STATEMENT_SWITCH: {
4508                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4509                                 count += count_decls_in_expression(switch_stmt->expression);
4510                                 count += count_decls_in_stmts(switch_stmt->body);
4511                                 break;
4512                         }
4513
4514                         case STATEMENT_LABEL: {
4515                                 const label_statement_t *const label_stmt = &stmt->label;
4516                                 if(label_stmt->statement != NULL) {
4517                                         count += count_decls_in_stmts(label_stmt->statement);
4518                                 }
4519                                 break;
4520                         }
4521
4522                         case STATEMENT_WHILE: {
4523                                 const while_statement_t *const while_stmt = &stmt->whiles;
4524                                 count += count_decls_in_expression(while_stmt->condition);
4525                                 count += count_decls_in_stmts(while_stmt->body);
4526                                 break;
4527                         }
4528
4529                         case STATEMENT_DO_WHILE: {
4530                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4531                                 count += count_decls_in_expression(do_while_stmt->condition);
4532                                 count += count_decls_in_stmts(do_while_stmt->body);
4533                                 break;
4534                         }
4535
4536                         case STATEMENT_FOR: {
4537                                 const for_statement_t *const for_stmt = &stmt->fors;
4538                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4539                                 count += count_decls_in_expression(for_stmt->initialisation);
4540                                 count += count_decls_in_expression(for_stmt->condition);
4541                                 count += count_decls_in_expression(for_stmt->step);
4542                                 count += count_decls_in_stmts(for_stmt->body);
4543                                 break;
4544                         }
4545
4546                         case STATEMENT_CASE_LABEL: {
4547                                 const case_label_statement_t *label = &stmt->case_label;
4548                                 count += count_decls_in_expression(label->expression);
4549                                 if(label->statement != NULL) {
4550                                         count += count_decls_in_stmts(label->statement);
4551                                 }
4552                                 break;
4553                         }
4554
4555                         case STATEMENT_ASM:
4556                         case STATEMENT_BREAK:
4557                         case STATEMENT_CONTINUE:
4558                                 break;
4559
4560                         case STATEMENT_EXPRESSION: {
4561                                 const expression_statement_t *expr_stmt = &stmt->expression;
4562                                 count += count_decls_in_expression(expr_stmt->expression);
4563                                 break;
4564                         }
4565
4566                         case STATEMENT_GOTO:
4567                         case STATEMENT_LEAVE:
4568                         case STATEMENT_INVALID:
4569                                 break;
4570
4571                         case STATEMENT_RETURN: {
4572                                 const return_statement_t *ret_stmt = &stmt->returns;
4573                                 count += count_decls_in_expression(ret_stmt->value);
4574                                 break;
4575                         }
4576
4577                         case STATEMENT_MS_TRY: {
4578                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4579                                 count += count_decls_in_stmts(try_stmt->try_statement);
4580                                 if(try_stmt->except_expression != NULL)
4581                                         count += count_decls_in_expression(try_stmt->except_expression);
4582                                 count += count_decls_in_stmts(try_stmt->final_statement);
4583                                 break;
4584                         }
4585                 }
4586         }
4587         return count;
4588 }
4589
4590 static int get_function_n_local_vars(declaration_t *declaration)
4591 {
4592         int count = 0;
4593
4594         /* count parameters */
4595         count += count_local_declarations(declaration->scope.declarations, NULL);
4596
4597         /* count local variables declared in body */
4598         count += count_decls_in_stmts(declaration->init.statement);
4599
4600         return count;
4601 }
4602
4603 static void initialize_function_parameters(declaration_t *declaration)
4604 {
4605         ir_graph        *irg             = current_ir_graph;
4606         ir_node         *args            = get_irg_args(irg);
4607         ir_node         *start_block     = get_irg_start_block(irg);
4608         ir_type         *function_irtype = get_ir_type(declaration->type);
4609
4610         int            n         = 0;
4611         declaration_t *parameter = declaration->scope.declarations;
4612         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4613                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4614                 type_t *type = skip_typeref(parameter->type);
4615
4616                 bool needs_entity = parameter->address_taken;
4617                 assert(!is_type_array(type));
4618                 if(is_type_compound(type)) {
4619                         needs_entity = true;
4620                 }
4621
4622                 if(needs_entity) {
4623                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4624                         ident     *id     = new_id_from_str(parameter->symbol->string);
4625                         set_entity_ident(entity, id);
4626
4627                         parameter->declaration_kind
4628                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4629                         parameter->v.entity = entity;
4630                         continue;
4631                 }
4632
4633                 ir_mode *mode = get_ir_mode(parameter->type);
4634                 long     pn   = n;
4635                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4636
4637                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4638                 parameter->v.value_number   = next_value_number_function;
4639                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4640                 ++next_value_number_function;
4641
4642                 set_value(parameter->v.value_number, proj);
4643         }
4644 }
4645
4646 /**
4647  * Handle additional decl modifiers for IR-graphs
4648  *
4649  * @param irg            the IR-graph
4650  * @param dec_modifiers  additional modifiers
4651  */
4652 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4653 {
4654         if (decl_modifiers & DM_NORETURN) {
4655                 /* TRUE if the declaration includes the Microsoft
4656                    __declspec(noreturn) specifier. */
4657                 set_irg_additional_property(irg, mtp_property_noreturn);
4658         }
4659         if (decl_modifiers & DM_NOTHROW) {
4660                 /* TRUE if the declaration includes the Microsoft
4661                    __declspec(nothrow) specifier. */
4662                 set_irg_additional_property(irg, mtp_property_nothrow);
4663         }
4664         if (decl_modifiers & DM_NAKED) {
4665                 /* TRUE if the declaration includes the Microsoft
4666                    __declspec(naked) specifier. */
4667                 set_irg_additional_property(irg, mtp_property_naked);
4668         }
4669         if (decl_modifiers & DM_FORCEINLINE) {
4670                 /* TRUE if the declaration includes the
4671                    Microsoft __forceinline specifier. */
4672                 set_irg_inline_property(irg, irg_inline_forced);
4673         }
4674         if (decl_modifiers & DM_NOINLINE) {
4675                 /* TRUE if the declaration includes the Microsoft
4676                    __declspec(noinline) specifier. */
4677                 set_irg_inline_property(irg, irg_inline_forbidden);
4678         }
4679 }
4680
4681 static void create_function(declaration_t *declaration)
4682 {
4683         ir_entity *function_entity = get_function_entity(declaration);
4684
4685         if(declaration->init.statement == NULL)
4686                 return;
4687
4688         current_function_decl = declaration;
4689         current_function_name = NULL;
4690         current_funcsig       = NULL;
4691
4692         assert(imature_blocks == NULL);
4693         imature_blocks = NEW_ARR_F(ir_node*, 0);
4694
4695         int       n_local_vars = get_function_n_local_vars(declaration);
4696         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4697         ir_node  *first_block  = get_cur_block();
4698
4699         /* set inline flags */
4700         if (declaration->is_inline)
4701         set_irg_inline_property(irg, irg_inline_recomended);
4702     handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4703
4704         next_value_number_function = 0;
4705         initialize_function_parameters(declaration);
4706
4707         statement_to_firm(declaration->init.statement);
4708
4709         ir_node *end_block = get_irg_end_block(irg);
4710
4711         /* do we have a return statement yet? */
4712         if(get_cur_block() != NULL) {
4713                 type_t *type = skip_typeref(declaration->type);
4714                 assert(is_type_function(type));
4715                 const function_type_t *func_type   = &type->function;
4716                 const type_t          *return_type
4717                         = skip_typeref(func_type->return_type);
4718
4719                 ir_node *ret;
4720                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4721                         ret = new_Return(get_store(), 0, NULL);
4722                 } else {
4723                         ir_mode *mode;
4724                         if(is_type_scalar(return_type)) {
4725                                 mode = get_ir_mode(func_type->return_type);
4726                         } else {
4727                                 mode = mode_P_data;
4728                         }
4729
4730                         ir_node *in[1];
4731                         /* §5.1.2.2.3 main implicitly returns 0 */
4732                         if (strcmp(declaration->symbol->string, "main") == 0) {
4733                                 in[0] = new_Const(mode, get_mode_null(mode));
4734                         } else {
4735                                 in[0] = new_Unknown(mode);
4736                         }
4737                         ret = new_Return(get_store(), 1, in);
4738                 }
4739                 add_immBlock_pred(end_block, ret);
4740         }
4741
4742         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4743                 mature_immBlock(imature_blocks[i]);
4744         }
4745         DEL_ARR_F(imature_blocks);
4746         imature_blocks = NULL;
4747
4748         mature_immBlock(first_block);
4749         mature_immBlock(end_block);
4750
4751         irg_finalize_cons(irg);
4752
4753         /* finalize the frame type */
4754         ir_type *frame_type = get_irg_frame_type(irg);
4755         int      n          = get_compound_n_members(frame_type);
4756         int      align_all  = 4;
4757         int      offset     = 0;
4758         for(int i = 0; i < n; ++i) {
4759                 ir_entity *entity      = get_compound_member(frame_type, i);
4760                 ir_type   *entity_type = get_entity_type(entity);
4761
4762                 int align = get_type_alignment_bytes(entity_type);
4763                 if(align > align_all)
4764                         align_all = align;
4765                 int misalign = 0;
4766                 if(align > 0) {
4767                         misalign  = offset % align;
4768                         if(misalign > 0) {
4769                                 offset += align - misalign;
4770                         }
4771                 }
4772
4773                 set_entity_offset(entity, offset);
4774                 offset += get_type_size_bytes(entity_type);
4775         }
4776         set_type_size_bytes(frame_type, offset);
4777         set_type_alignment_bytes(frame_type, align_all);
4778
4779         irg_vrfy(irg);
4780 }
4781
4782 static void scope_to_firm(scope_t *scope)
4783 {
4784         /* first pass: create declarations */
4785         declaration_t *declaration = scope->declarations;
4786         for( ; declaration != NULL; declaration = declaration->next) {
4787                 if(declaration->namespc != NAMESPACE_NORMAL)
4788                         continue;
4789                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4790                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4791                         continue;
4792                 if(declaration->symbol == NULL)
4793                         continue;
4794
4795                 type_t *type = skip_typeref(declaration->type);
4796                 if(is_type_function(type)) {
4797                         get_function_entity(declaration);
4798                 } else {
4799                         create_global_variable(declaration);
4800                 }
4801         }
4802
4803         /* second pass: create code/initializers */
4804         declaration = scope->declarations;
4805         for( ; declaration != NULL; declaration = declaration->next) {
4806                 if(declaration->namespc != NAMESPACE_NORMAL)
4807                         continue;
4808                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4809                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4810                         continue;
4811                 if(declaration->symbol == NULL)
4812                         continue;
4813
4814                 type_t *type = declaration->type;
4815                 if(type->kind == TYPE_FUNCTION) {
4816                         create_function(declaration);
4817                 } else {
4818                         assert(declaration->declaration_kind
4819                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4820                         current_ir_graph = get_const_code_irg();
4821                         create_declaration_initializer(declaration);
4822                 }
4823         }
4824 }
4825
4826 void init_ast2firm(void)
4827 {
4828         obstack_init(&asm_obst);
4829         init_atomic_modes();
4830
4831         /* create idents for all known runtime functions */
4832         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4833                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4834         }
4835 }
4836
4837 static void init_ir_types(void)
4838 {
4839         static int ir_types_initialized = 0;
4840         if(ir_types_initialized)
4841                 return;
4842         ir_types_initialized = 1;
4843
4844         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4845         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4846         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4847
4848         ir_type_int        = get_ir_type(type_int);
4849         ir_type_const_char = get_ir_type(type_const_char);
4850         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4851         ir_type_void       = get_ir_type(type_void);
4852 }
4853
4854 void exit_ast2firm(void)
4855 {
4856         obstack_free(&asm_obst, NULL);
4857 }
4858
4859 void translation_unit_to_firm(translation_unit_t *unit)
4860 {
4861         /* just to be sure */
4862         continue_label      = NULL;
4863         break_label         = NULL;
4864         current_switch_cond = NULL;
4865
4866         init_ir_types();
4867
4868         scope_to_firm(&unit->scope);
4869 }