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 /* some idents needed for name mangling */
  47 static ident *id_underscore;
  48 static ident *id_imp;
  49
  50 static ir_type *ir_type_const_char;
  51 static ir_type *ir_type_wchar_t;
  52 static ir_type *ir_type_void;
  53 static ir_type *ir_type_int;
  54
  55 static type_t *type_const_char;
  56
  57 static int       next_value_number_function;
  58 static ir_node  *continue_label;
  59 static ir_node  *break_label;
  60 static ir_node  *current_switch_cond;
  61 static bool      saw_default_label;
  62 static ir_node **imature_blocks;
  63
  64 static const declaration_t *current_function_decl;
  65 static ir_node             *current_function_name;
  66 static ir_node             *current_funcsig;
  67
  68 static struct obstack asm_obst;
  69
  70 typedef enum declaration_kind_t {
  71         DECLARATION_KIND_UNKNOWN,
  72         DECLARATION_KIND_FUNCTION,
  73         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  74         DECLARATION_KIND_GLOBAL_VARIABLE,
  75         DECLARATION_KIND_LOCAL_VARIABLE,
  76         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  77         DECLARATION_KIND_COMPOUND_MEMBER,
  78         DECLARATION_KIND_LABEL_BLOCK,
  79         DECLARATION_KIND_ENUM_ENTRY,
  80         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  81         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
  82 } declaration_kind_t;
  83
  84 static ir_type *get_ir_type(type_t *type);
  85 static ir_type *get_ir_type_incomplete(type_t *type);
  86 static int count_decls_in_stmts(const statement_t *stmt);
  87
  88 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  89 {
  90         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  91
  92         warningf(&declaration->source_position,
  93                  "variable '%#T' might be used uninitialized",
  94                  declaration->type, declaration->symbol);
  95         return new_r_Unknown(irg, mode);
  96 }
  97
  98 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  99 {
 100         const source_position_t *pos = (const source_position_t*) dbg;
 101         if(pos == NULL)
 102                 return 0;
 103         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 104                                    pos->linenr);
 105 }
 106
 107 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 108 {
 109         const source_position_t *pos = (const source_position_t*) dbg;
 110         if(pos == NULL)
 111                 return NULL;
 112         if(line != NULL)
 113                 *line = pos->linenr;
 114         return pos->input_name;
 115 }
 116
 117 static dbg_info *get_dbg_info(const source_position_t *pos)
 118 {
 119         return (dbg_info*) pos;
 120 }
 121
 122 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 123
 124 static ir_mode *mode_int, *mode_uint;
 125
 126 static ir_node *expression_to_firm(const expression_t *expression);
 127 static inline ir_mode *get_ir_mode(type_t *type);
 128
 129 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 130 {
 131         unsigned flags = get_atomic_type_flags(kind);
 132         unsigned size  = get_atomic_type_size(kind);
 133         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 134                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 135                 char            name[64];
 136                 mode_sort       sort;
 137                 unsigned        bit_size     = size * 8;
 138                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 139                 mode_arithmetic arithmetic;
 140                 unsigned        modulo_shift;
 141
 142                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 143                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 144                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 145                         sort         = irms_int_number;
 146                         arithmetic   = irma_twos_complement;
 147                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 148                 } else {
 149                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 150                         snprintf(name, sizeof(name), "f%d", bit_size);
 151                         sort         = irms_float_number;
 152                         arithmetic   = irma_ieee754;
 153                         modulo_shift = 0;
 154                 }
 155                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 156                                    modulo_shift);
 157         }
 158
 159         return NULL;
 160 }
 161
 162 /**
 163  * Initialises the atomic modes depending on the machine size.
 164  */
 165 static void init_atomic_modes(void)
 166 {
 167         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 168                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 169         }
 170         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 171         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 172
 173         /* there's no real void type in firm */
 174         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 175
 176         /* initialize pointer modes */
 177         char            name[64];
 178         mode_sort       sort         = irms_reference;
 179         unsigned        bit_size     = machine_size;
 180         bool            is_signed    = 0;
 181         mode_arithmetic arithmetic   = irma_twos_complement;
 182         unsigned        modulo_shift
 183                 = bit_size < machine_size ? machine_size : bit_size;
 184
 185         snprintf(name, sizeof(name), "p%d", machine_size);
 186         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 187                                         modulo_shift);
 188
 189         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 190         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 191
 192         /* Hmm, pointers should be machine size */
 193         set_modeP_data(ptr_mode);
 194         set_modeP_code(ptr_mode);
 195 }
 196
 197 static unsigned get_compound_type_size(compound_type_t *type)
 198 {
 199         ir_type *irtype = get_ir_type((type_t*) type);
 200         return get_type_size_bytes(irtype);
 201 }
 202
 203 static unsigned get_array_type_size(array_type_t *type)
 204 {
 205         assert(!type->is_vla);
 206         ir_type *irtype = get_ir_type((type_t*) type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210
 211 static unsigned get_type_size_const(type_t *type)
 212 {
 213         type = skip_typeref(type);
 214
 215         switch(type->kind) {
 216         case TYPE_ERROR:
 217                 panic("error type occured");
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size(type->atomic.akind);
 220         case TYPE_COMPLEX:
 221                 return 2 * get_atomic_type_size(type->complex.akind);
 222         case TYPE_IMAGINARY:
 223                 return get_atomic_type_size(type->imaginary.akind);
 224         case TYPE_ENUM:
 225                 return get_mode_size_bytes(mode_int);
 226         case TYPE_COMPOUND_UNION:
 227         case TYPE_COMPOUND_STRUCT:
 228                 return get_compound_type_size(&type->compound);
 229         case TYPE_FUNCTION:
 230                 /* just a pointer to the function */
 231                 return get_mode_size_bytes(mode_P_code);
 232         case TYPE_POINTER:
 233                 return get_mode_size_bytes(mode_P_data);
 234         case TYPE_ARRAY:
 235                 return get_array_type_size(&type->array);
 236         case TYPE_BUILTIN:
 237                 return get_type_size_const(type->builtin.real_type);
 238         case TYPE_BITFIELD:
 239                 panic("type size of bitfield request");
 240         case TYPE_TYPEDEF:
 241         case TYPE_TYPEOF:
 242         case TYPE_INVALID:
 243                 break;
 244         }
 245         panic("Trying to determine size of invalid type");
 246 }
 247
 248 static ir_node *get_type_size(type_t *type)
 249 {
 250         type = skip_typeref(type);
 251
 252         if(is_type_array(type) && type->array.is_vla) {
 253                 ir_node *size_node = type->array.size_node;
 254                 if(size_node == NULL) {
 255                         size_node = expression_to_firm(type->array.size_expression);
 256                         assert(!is_Const(size_node));
 257                         type->array.size_node = size_node;
 258                 }
 259
 260                 ir_node *elem_size = get_type_size(type->array.element_type);
 261                 ir_mode *mode      = get_irn_mode(size_node);
 262                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 263                 return real_size;
 264         }
 265
 266         ir_mode *mode = get_ir_mode(type_size_t);
 267         symconst_symbol sym;
 268         sym.type_p = get_ir_type(type);
 269         return new_SymConst(mode, sym, symconst_type_size);
 270 }
 271
 272 static unsigned count_parameters(const function_type_t *function_type)
 273 {
 274         unsigned count = 0;
 275
 276         function_parameter_t *parameter = function_type->parameters;
 277         for ( ; parameter != NULL; parameter = parameter->next) {
 278                 ++count;
 279         }
 280
 281         return count;
 282 }
 283
 284 /**
 285  * Creates a Firm type for an atomic type
 286  */
 287 static ir_type *create_atomic_type(const atomic_type_t *type)
 288 {
 289         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 290         atomic_type_kind_t  kind      = type->akind;
 291         ir_mode            *mode      = _atomic_modes[kind];
 292         ident              *id        = get_mode_ident(mode);
 293         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 294
 295         set_type_alignment_bytes(irtype, type->base.alignment);
 296
 297         return irtype;
 298 }
 299
 300 /**
 301  * Creates a Firm type for a complex type
 302  */
 303 static ir_type *create_complex_type(const complex_type_t *type)
 304 {
 305         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 306         atomic_type_kind_t  kind      = type->akind;
 307         ir_mode            *mode      = _atomic_modes[kind];
 308         ident              *id        = get_mode_ident(mode);
 309
 310         (void) id;
 311         (void) dbgi;
 312
 313         /* FIXME: finish the array */
 314         return NULL;
 315 }
 316
 317 /**
 318  * Creates a Firm type for an imaginary type
 319  */
 320 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 321 {
 322         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 323         atomic_type_kind_t  kind      = type->akind;
 324         ir_mode            *mode      = _atomic_modes[kind];
 325         ident              *id        = get_mode_ident(mode);
 326         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 327
 328         set_type_alignment_bytes(irtype, type->base.alignment);
 329
 330         return irtype;
 331 }
 332
 333 static ir_type *create_method_type(const function_type_t *function_type)
 334 {
 335         type_t  *return_type  = function_type->return_type;
 336
 337         ident   *id           = id_unique("functiontype.%u");
 338         int      n_parameters = count_parameters(function_type);
 339         int      n_results    = return_type == type_void ? 0 : 1;
 340         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 341         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 342
 343         if(return_type != type_void) {
 344                 ir_type *restype = get_ir_type(return_type);
 345                 set_method_res_type(irtype, 0, restype);
 346         }
 347
 348         function_parameter_t *parameter = function_type->parameters;
 349         int                   n         = 0;
 350         for( ; parameter != NULL; parameter = parameter->next) {
 351                 ir_type *p_irtype = get_ir_type(parameter->type);
 352                 set_method_param_type(irtype, n, p_irtype);
 353                 ++n;
 354         }
 355
 356         if(function_type->variadic || function_type->unspecified_parameters) {
 357                 set_method_variadicity(irtype, variadicity_variadic);
 358         }
 359
 360         return irtype;
 361 }
 362
 363 static ir_type *create_pointer_type(pointer_type_t *type)
 364 {
 365         type_t   *points_to    = type->points_to;
 366         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 367         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 368         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 369                                                     ir_points_to, mode_P_data, dbgi);
 370
 371         return ir_type;
 372 }
 373
 374 static ir_type *create_array_type(array_type_t *type)
 375 {
 376         type_t  *element_type    = type->element_type;
 377         ir_type *ir_element_type = get_ir_type(element_type);
 378
 379         ident    *id      = id_unique("array.%u");
 380         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 381         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 382
 383         const int align = get_type_alignment_bytes(ir_element_type);
 384         set_type_alignment_bytes(ir_type, align);
 385
 386         if(type->size_constant) {
 387                 int n_elements = type->size;
 388
 389                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 390
 391                 size_t elemsize = get_type_size_bytes(ir_element_type);
 392                 if(elemsize % align > 0) {
 393                         elemsize += align - (elemsize % align);
 394                 }
 395                 set_type_size_bytes(ir_type, n_elements * elemsize);
 396         } else {
 397                 set_array_lower_bound_int(ir_type, 0, 0);
 398         }
 399         set_type_state(ir_type, layout_fixed);
 400
 401         return ir_type;
 402 }
 403
 404 /**
 405  * Return the signed integer type of size bits.
 406  *
 407  * @param size   the size
 408  */
 409 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 410                                                  unsigned size)
 411 {
 412         static ir_mode *s_modes[64 + 1] = {NULL, };
 413         ir_type *res;
 414         ir_mode *mode;
 415
 416         if (size <= 0 || size > 64)
 417                 return NULL;
 418
 419         mode = s_modes[size];
 420         if (mode == NULL) {
 421                 char name[32];
 422
 423                 snprintf(name, sizeof(name), "bf_I%u", size);
 424                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 425                                    size <= 32 ? 32 : size );
 426                 s_modes[size] = mode;
 427         }
 428
 429         char name[32];
 430         snprintf(name, sizeof(name), "I%u", size);
 431         ident *id = new_id_from_str(name);
 432         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 433         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 434         set_primitive_base_type(res, base_tp);
 435
 436         return res;
 437 }
 438
 439 /**
 440  * Return the unsigned integer type of size bits.
 441  *
 442  * @param size   the size
 443  */
 444 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 445                                                    unsigned size)
 446 {
 447         static ir_mode *u_modes[64 + 1] = {NULL, };
 448         ir_type *res;
 449         ir_mode *mode;
 450
 451         if (size <= 0 || size > 64)
 452                 return NULL;
 453
 454         mode = u_modes[size];
 455         if (mode == NULL) {
 456                 char name[32];
 457
 458                 snprintf(name, sizeof(name), "bf_U%u", size);
 459                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 460                                    size <= 32 ? 32 : size );
 461                 u_modes[size] = mode;
 462         }
 463
 464         char name[32];
 465
 466         snprintf(name, sizeof(name), "U%u", size);
 467         ident *id = new_id_from_str(name);
 468         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 469         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 470         set_primitive_base_type(res, base_tp);
 471
 472         return res;
 473 }
 474
 475 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 476 {
 477         type_t *base = skip_typeref(type->base_type);
 478         assert(base->kind == TYPE_ATOMIC);
 479         ir_type *irbase = get_ir_type(base);
 480
 481         unsigned size = fold_constant(type->size);
 482
 483         assert(!is_type_float(base));
 484         if(is_type_signed(base)) {
 485                 return get_signed_int_type_for_bit_size(irbase, size);
 486         } else {
 487                 return get_unsigned_int_type_for_bit_size(irbase, size);
 488         }
 489 }
 490
 491 #define INVALID_TYPE ((ir_type_ptr)-1)
 492
 493 enum {
 494         COMPOUND_IS_STRUCT = false,
 495         COMPOUND_IS_UNION  = true
 496 };
 497
 498 /**
 499  * Construct firm type from ast struct tyep.
 500  *
 501  * As anonymous inner structs get flattened to a single firm type, we might get
 502  * irtype, outer_offset and out_align passed (they represent the position of
 503  * the anonymous inner struct inside the resulting firm struct)
 504  */
 505 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 506                                      size_t *outer_offset, size_t *outer_align,
 507                                      bool incomplete, bool is_union)
 508 {
 509         declaration_t      *declaration = type->declaration;
 510         declaration_kind_t  kind        = declaration->declaration_kind;
 511
 512         if(kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 513                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 514                                 && incomplete))
 515                 return declaration->v.irtype;
 516
 517         size_t align_all  = 1;
 518         size_t offset     = 0;
 519         size_t bit_offset = 0;
 520         size_t size       = 0;
 521
 522         if(irtype == NULL) {
 523                 symbol_t *symbol = declaration->symbol;
 524                 ident    *id;
 525                 if(symbol != NULL) {
 526                         id = new_id_from_str(symbol->string);
 527                 } else {
 528                         if (is_union) {
 529                                 id = id_unique("__anonymous_union.%u");
 530                         } else {
 531                                 id = id_unique("__anonymous_struct.%u");
 532                         }
 533                 }
 534                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 535
 536                 if (is_union) {
 537                         irtype = new_d_type_union(id, dbgi);
 538                 } else {
 539                         irtype = new_d_type_struct(id, dbgi);
 540                 }
 541
 542                 declaration->declaration_kind
 543                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 544                 declaration->v.irtype         = irtype;
 545                 //type->base.firm_type          = irtype;
 546         } else {
 547                 offset    = *outer_offset;
 548                 align_all = *outer_align;
 549         }
 550
 551         if(incomplete)
 552                 return irtype;
 553
 554         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 555
 556         declaration_t *entry = declaration->scope.declarations;
 557         for( ; entry != NULL; entry = entry->next) {
 558                 if(entry->namespc != NAMESPACE_NORMAL)
 559                         continue;
 560
 561                 size_t prev_offset = offset;
 562
 563                 symbol_t *symbol     = entry->symbol;
 564                 type_t   *entry_type = skip_typeref(entry->type);
 565                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 566
 567                 ident    *ident;
 568                 if(symbol != NULL) {
 569                         ident = new_id_from_str(symbol->string);
 570                 } else {
 571                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 572                                 create_compound_type(&entry_type->compound, irtype, &offset,
 573                                                      &align_all, false, COMPOUND_IS_STRUCT);
 574                                 goto finished_member;
 575                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 576                                 create_compound_type(&entry_type->compound, irtype, &offset,
 577                                                      &align_all, false, COMPOUND_IS_UNION);
 578                                 goto finished_member;
 579                         } else {
 580                                 assert(entry_type->kind == TYPE_BITFIELD);
 581                         }
 582                         ident = id_unique("anon.%u");
 583                 }
 584
 585                 ir_type *base_irtype;
 586                 if(entry_type->kind == TYPE_BITFIELD) {
 587                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 588                 } else {
 589                         base_irtype = get_ir_type(entry_type);
 590                 }
 591
 592                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 593                 size_t misalign        = offset % entry_alignment;
 594
 595                 ir_type   *entry_irtype = get_ir_type(entry_type);
 596                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 597
 598                 size_t base;
 599                 size_t bits_remainder;
 600                 if(entry_type->kind == TYPE_BITFIELD) {
 601                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 602                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 603
 604                         if(size_bits > rest_size_bits) {
 605                                 /* start a new bucket */
 606                                 offset     += entry_alignment - misalign;
 607                                 bit_offset  = 0;
 608
 609                                 base           = offset;
 610                                 bits_remainder = 0;
 611                         } else {
 612                                 /* put into current bucket */
 613                                 base           = offset - misalign;
 614                                 bits_remainder = misalign * 8 + bit_offset;
 615                         }
 616
 617                         offset     += size_bits / 8;
 618                         bit_offset  = bit_offset + (size_bits % 8);
 619                 } else {
 620                         size_t entry_size = get_type_size_bytes(base_irtype);
 621                         if(misalign > 0 || bit_offset > 0)
 622                                 offset += entry_alignment - misalign;
 623
 624                         base           = offset;
 625                         bits_remainder = 0;
 626                         offset        += entry_size;
 627                         bit_offset     = 0;
 628                 }
 629
 630                 if(entry_alignment > align_all) {
 631                         if(entry_alignment % align_all != 0) {
 632                                 panic("uneven alignments not supported yet");
 633                         }
 634                         align_all = entry_alignment;
 635                 }
 636
 637                 set_entity_offset(entity, base);
 638                 set_entity_offset_bits_remainder(entity,
 639                                                  (unsigned char) bits_remainder);
 640                 //add_struct_member(irtype, entity);
 641                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 642                 assert(entry->v.entity == NULL);
 643                 entry->v.entity         = entity;
 644
 645 finished_member:
 646                 if (is_union) {
 647                         size_t entry_size = offset - prev_offset;
 648                         if (entry_size > size) {
 649                                 size = entry_size;
 650                         }
 651                         offset     = 0;
 652                         bit_offset = 0;
 653                 }
 654         }
 655
 656         if (!is_union) {
 657                 size = offset;
 658         }
 659
 660         size_t misalign = offset % align_all;
 661         if(misalign > 0 || bit_offset > 0) {
 662                 size += align_all - misalign;
 663         }
 664
 665         if(outer_offset != NULL) {
 666                 if (!is_union) {
 667                         *outer_offset = offset;
 668                 } else {
 669                         *outer_offset += size;
 670                 }
 671
 672                 if (align_all > *outer_align) {
 673                         if(align_all % *outer_align != 0) {
 674                                 panic("uneven alignments not supported yet");
 675                         }
 676                         *outer_align = align_all;
 677                 }
 678         } else {
 679                 set_type_alignment_bytes(irtype, align_all);
 680                 set_type_size_bytes(irtype, size);
 681                 set_type_state(irtype, layout_fixed);
 682         }
 683
 684         return irtype;
 685 }
 686
 687 static ir_type *create_enum_type(enum_type_t *const type)
 688 {
 689         type->base.firm_type = ir_type_int;
 690
 691         ir_mode *const mode    = mode_int;
 692         tarval  *const one     = get_mode_one(mode);
 693         tarval  *      tv_next = get_tarval_null(mode);
 694
 695         declaration_t *declaration = type->declaration->next;
 696         for (; declaration != NULL; declaration = declaration->next) {
 697                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 698                         break;
 699
 700                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 701
 702                 expression_t *const init = declaration->init.enum_value;
 703                 if (init != NULL) {
 704                         ir_node *const cnst = expression_to_firm(init);
 705                         if (!is_Const(cnst)) {
 706                                 panic("couldn't fold constant");
 707                         }
 708                         tv_next = get_Const_tarval(cnst);
 709                 }
 710                 declaration->v.enum_val = tv_next;
 711                 tv_next = tarval_add(tv_next, one);
 712         }
 713
 714         return ir_type_int;
 715 }
 716
 717 static ir_type *get_ir_type_incomplete(type_t *type)
 718 {
 719         assert(type != NULL);
 720         type = skip_typeref(type);
 721
 722         if (type->base.firm_type != NULL) {
 723                 assert(type->base.firm_type != INVALID_TYPE);
 724                 return type->base.firm_type;
 725         }
 726
 727         switch (type->kind) {
 728         case TYPE_COMPOUND_STRUCT:
 729                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 730                                             true, COMPOUND_IS_STRUCT);
 731                 break;
 732         case TYPE_COMPOUND_UNION:
 733                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 734                                             true, COMPOUND_IS_UNION);
 735         default:
 736                 return get_ir_type(type);
 737         }
 738 }
 739
 740 static ir_type *get_ir_type(type_t *type)
 741 {
 742         assert(type != NULL);
 743
 744         type = skip_typeref(type);
 745
 746         if (type->base.firm_type != NULL) {
 747                 assert(type->base.firm_type != INVALID_TYPE);
 748                 return type->base.firm_type;
 749         }
 750
 751         ir_type *firm_type = NULL;
 752         switch (type->kind) {
 753         case TYPE_ERROR:
 754                 panic("error type occurred");
 755         case TYPE_ATOMIC:
 756                 firm_type = create_atomic_type(&type->atomic);
 757                 break;
 758         case TYPE_COMPLEX:
 759                 firm_type = create_complex_type(&type->complex);
 760                 break;
 761         case TYPE_IMAGINARY:
 762                 firm_type = create_imaginary_type(&type->imaginary);
 763                 break;
 764         case TYPE_FUNCTION:
 765                 firm_type = create_method_type(&type->function);
 766                 break;
 767         case TYPE_POINTER:
 768                 firm_type = create_pointer_type(&type->pointer);
 769                 break;
 770         case TYPE_ARRAY:
 771                 firm_type = create_array_type(&type->array);
 772                 break;
 773         case TYPE_COMPOUND_STRUCT:
 774                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 775                                                  false, COMPOUND_IS_STRUCT);
 776                 break;
 777         case TYPE_COMPOUND_UNION:
 778                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 779                                                  false, COMPOUND_IS_UNION);
 780                 break;
 781         case TYPE_ENUM:
 782                 firm_type = create_enum_type(&type->enumt);
 783                 break;
 784         case TYPE_BUILTIN:
 785                 firm_type = get_ir_type(type->builtin.real_type);
 786                 break;
 787         case TYPE_BITFIELD:
 788                 firm_type = create_bitfield_type(&type->bitfield);
 789                 break;
 790
 791         case TYPE_TYPEOF:
 792         case TYPE_TYPEDEF:
 793         case TYPE_INVALID:
 794                 break;
 795         }
 796         if(firm_type == NULL)
 797                 panic("unknown type found");
 798
 799         type->base.firm_type = firm_type;
 800         return firm_type;
 801 }
 802
 803 static inline ir_mode *get_ir_mode(type_t *type)
 804 {
 805         ir_type *irtype = get_ir_type(type);
 806
 807         /* firm doesn't report a mode for arrays somehow... */
 808         if(is_Array_type(irtype)) {
 809                 return mode_P_data;
 810         }
 811
 812         ir_mode *mode = get_type_mode(irtype);
 813         assert(mode != NULL);
 814         return mode;
 815 }
 816
 817 static ident *predef_idents[rts_max];
 818
 819 /** Names of the runtime functions. */
 820 static const struct {
 821         int        id;           /**< the rts id */
 822         int        n_res;        /**< number of return values */
 823         const char *name;        /**< the name of the rts function */
 824         int        n_params;     /**< number of parameters */
 825         unsigned   flags;        /**< language flags */
 826 } rts_data[] = {
 827         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 828         { rts_abort,      0, "abort",        0, _C89 },
 829         { rts_abs,        1, "abs",          1, _C89 },
 830         { rts_labs,       1, "labs",         1, _C89 },
 831         { rts_llabs,      1, "llabs",        1, _C99 },
 832         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 833
 834         { rts_fabs,       1, "fabs",         1, _C89 },
 835         { rts_sqrt,       1, "sqrt",         1, _C89 },
 836         { rts_cbrt,       1, "cbrt",         1, _C99 },
 837         { rts_exp,        1, "exp",          1, _C89 },
 838         { rts_exp2,       1, "exp2",         1, _C89 },
 839         { rts_exp10,      1, "exp10",        1, _GNUC },
 840         { rts_log,        1, "log",          1, _C89 },
 841         { rts_log2,       1, "log2",         1, _C89 },
 842         { rts_log10,      1, "log10",        1, _C89 },
 843         { rts_pow,        1, "pow",          2, _C89 },
 844         { rts_sin,        1, "sin",          1, _C89 },
 845         { rts_cos,        1, "cos",          1, _C89 },
 846         { rts_tan,        1, "tan",          1, _C89 },
 847         { rts_asin,       1, "asin",         1, _C89 },
 848         { rts_acos,       1, "acos",         1, _C89 },
 849         { rts_atan,       1, "atan",         1, _C89 },
 850         { rts_sinh,       1, "sinh",         1, _C89 },
 851         { rts_cosh,       1, "cosh",         1, _C89 },
 852         { rts_tanh,       1, "tanh",         1, _C89 },
 853
 854         { rts_fabsf,      1, "fabsf",        1, _C99 },
 855         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 856         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 857         { rts_expf,       1, "expf",         1, _C99 },
 858         { rts_exp2f,      1, "exp2f",        1, _C99 },
 859         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 860         { rts_logf,       1, "logf",         1, _C99 },
 861         { rts_log2f,      1, "log2f",        1, _C99 },
 862         { rts_log10f,     1, "log10f",       1, _C99 },
 863         { rts_powf,       1, "powf",         2, _C99 },
 864         { rts_sinf,       1, "sinf",         1, _C99 },
 865         { rts_cosf,       1, "cosf",         1, _C99 },
 866         { rts_tanf,       1, "tanf",         1, _C99 },
 867         { rts_asinf,      1, "asinf",        1, _C99 },
 868         { rts_acosf,      1, "acosf",        1, _C99 },
 869         { rts_atanf,      1, "atanf",        1, _C99 },
 870         { rts_sinhf,      1, "sinhf",        1, _C99 },
 871         { rts_coshf,      1, "coshf",        1, _C99 },
 872         { rts_tanhf,      1, "tanhf",        1, _C99 },
 873
 874         { rts_fabsl,      1, "fabsl",        1, _C99 },
 875         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 876         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 877         { rts_expl,       1, "expl",         1, _C99 },
 878         { rts_exp2l,      1, "exp2l",        1, _C99 },
 879         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 880         { rts_logl,       1, "logl",         1, _C99 },
 881         { rts_log2l,      1, "log2l",        1, _C99 },
 882         { rts_log10l,     1, "log10l",       1, _C99 },
 883         { rts_powl,       1, "powl",         2, _C99 },
 884         { rts_sinl,       1, "sinl",         1, _C99 },
 885         { rts_cosl,       1, "cosl",         1, _C99 },
 886         { rts_tanl,       1, "tanl",         1, _C99 },
 887         { rts_asinl,      1, "asinl",        1, _C99 },
 888         { rts_acosl,      1, "acosl",        1, _C99 },
 889         { rts_atanl,      1, "atanl",        1, _C99 },
 890         { rts_sinhl,      1, "sinhl",        1, _C99 },
 891         { rts_coshl,      1, "coshl",        1, _C99 },
 892         { rts_tanhl,      1, "tanhl",        1, _C99 },
 893
 894         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 895         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 896         { rts_strcmp,     1, "strcmp",       2, _C89 },
 897         { rts_strncmp,    1, "strncmp",      3, _C89 }
 898 };
 899
 900 /**
 901  * Mangles an entity linker (ld) name for win32 usage.
 902  *
 903  * @param ent          the entity to be mangled
 904  * @param declaration  the declaration
 905  */
 906 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 907 {
 908         ident *id;
 909
 910         if (is_Method_type(get_entity_type(ent)))
 911                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 912         else {
 913                 /* always add an underscore in win32 */
 914                 id = mangle(id_underscore, get_entity_ident(ent));
 915         }
 916
 917         decl_modifiers_t decl_modifiers = declaration->decl_modifiers;
 918         if (decl_modifiers & DM_DLLIMPORT) {
 919                 /* add prefix for imported symbols */
 920                 id = mangle(id_imp, id);
 921         }
 922         return id;
 923 }
 924
 925 /**
 926  * Mangles an entity linker (ld) name for Linux ELF usage.
 927  *
 928  * @param ent          the entity to be mangled
 929  * @param declaration  the declaration
 930  */
 931 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 932                                         declaration_t *declaration)
 933 {
 934         (void) declaration;
 935         return get_entity_ident(entity);
 936 }
 937
 938 /**
 939  * Mangles an entity linker (ld) name for Mach-O usage.
 940  *
 941  * @param ent          the entity to be mangled
 942  * @param declaration  the declaration
 943  */
 944 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 945 {
 946         (void) declaration;
 947         ident *id = mangle(id_underscore, get_entity_ident(ent));
 948         return id;
 949 }
 950
 951 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 952                                        declaration_t *declaration);
 953 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 954
 955 static ir_entity* get_function_entity(declaration_t *declaration)
 956 {
 957         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 958                 return declaration->v.entity;
 959         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 960
 961         symbol_t *symbol = declaration->symbol;
 962         ident    *id     = new_id_from_str(symbol->string);
 963
 964         ir_type  *global_type    = get_glob_type();
 965         ir_type  *ir_type_method = get_ir_type(declaration->type);
 966         assert(is_Method_type(ir_type_method));
 967
 968         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 969         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 970         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
 971         if(declaration->storage_class == STORAGE_CLASS_STATIC
 972                         || declaration->is_inline) {
 973                 set_entity_visibility(entity, visibility_local);
 974         } else if(declaration->init.statement != NULL) {
 975                 set_entity_visibility(entity, visibility_external_visible);
 976         } else {
 977                 set_entity_visibility(entity, visibility_external_allocated);
 978
 979                 /* We should check for file scope here, but as long as we compile C only
 980                    this is not needed. */
 981                 int    n_params = get_method_n_params(ir_type_method);
 982                 int    n_res    = get_method_n_ress(ir_type_method);
 983                 int    i;
 984
 985                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
 986                         /* found abort(), store for later */
 987                         //abort_ent = ent;
 988                         //abort_tp  = ftype;
 989                 } else {
 990                         if (! firm_opt.freestanding) {
 991                                 /* check for a known runtime function */
 992                                 for (i = 0; i < rts_max; ++i) {
 993                                         /* ignore those rts functions not necessary needed for current mode */
 994                                         if ((c_mode & rts_data[i].flags) == 0)
 995                                                 continue;
 996                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
 997                                                 id == predef_idents[rts_data[i].id])
 998                                                 rts_entities[rts_data[i].id] = entity;
 999                                 }
1000                         }
1001                 }
1002         }
1003         set_entity_allocation(entity, allocation_static);
1004
1005         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1006         declaration->v.entity         = entity;
1007
1008         return entity;
1009 }
1010
1011 static ir_node *const_to_firm(const const_expression_t *cnst)
1012 {
1013         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1014         ir_mode  *mode = get_ir_mode(cnst->base.type);
1015
1016         char    buf[128];
1017         tarval *tv;
1018         size_t  len;
1019         if(mode_is_float(mode)) {
1020                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1021         } else {
1022                 if(mode_is_signed(mode)) {
1023                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1024                 } else {
1025                         len = snprintf(buf, sizeof(buf), "%llu",
1026                                        (unsigned long long) cnst->v.int_value);
1027                 }
1028                 tv = new_tarval_from_str(buf, len, mode);
1029         }
1030
1031         return new_d_Const(dbgi, mode, tv);
1032 }
1033
1034 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1035 {
1036         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1037         ir_mode  *mode = get_ir_mode(cnst->base.type);
1038
1039         long long int v = 0;
1040         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1041                 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1042         }
1043         char    buf[128];
1044         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1045         tarval *tv = new_tarval_from_str(buf, len, mode);
1046
1047         return new_d_Const(dbgi, mode, tv);
1048 }
1049
1050 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1051 {
1052         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1053         ir_mode  *mode = get_ir_mode(cnst->base.type);
1054
1055         long long int v = cnst->v.wide_character.begin[0];
1056
1057         char    buf[128];
1058         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1059         tarval *tv = new_tarval_from_str(buf, len, mode);
1060
1061         return new_d_Const(dbgi, mode, tv);
1062 }
1063
1064 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1065                               ir_entity *entity)
1066 {
1067         assert(entity != NULL);
1068         union symconst_symbol sym;
1069         sym.entity_p = entity;
1070         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1071 }
1072
1073 static ir_node *string_to_firm(const source_position_t *const src_pos,
1074                                const char *const id_prefix,
1075                                const string_t *const value)
1076 {
1077         ir_type  *const global_type = get_glob_type();
1078         dbg_info *const dbgi        = get_dbg_info(src_pos);
1079         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1080                                                        ir_type_const_char, dbgi);
1081
1082         ident     *const id     = id_unique(id_prefix);
1083         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1084         set_entity_ld_ident(entity, id);
1085         set_entity_variability(entity, variability_constant);
1086         set_entity_allocation(entity, allocation_static);
1087
1088         ir_type *const elem_type = ir_type_const_char;
1089         ir_mode *const mode      = get_type_mode(elem_type);
1090
1091         const char* const string = value->begin;
1092         const size_t      slen   = value->size;
1093
1094         set_array_lower_bound_int(type, 0, 0);
1095         set_array_upper_bound_int(type, 0, slen);
1096         set_type_size_bytes(type, slen);
1097         set_type_state(type, layout_fixed);
1098
1099         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1100         for(size_t i = 0; i < slen; ++i) {
1101                 tvs[i] = new_tarval_from_long(string[i], mode);
1102         }
1103
1104         set_array_entity_values(entity, tvs, slen);
1105         free(tvs);
1106
1107         return create_symconst(dbgi, mode_P_data, entity);
1108 }
1109
1110 static ir_node *string_literal_to_firm(
1111                 const string_literal_expression_t* literal)
1112 {
1113         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1114                               &literal->value);
1115 }
1116
1117 static ir_node *wide_string_literal_to_firm(
1118         const wide_string_literal_expression_t* const literal)
1119 {
1120         ir_type *const global_type = get_glob_type();
1121         ir_type *const elem_type   = ir_type_wchar_t;
1122         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1123         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1124                                                     elem_type, dbgi);
1125
1126         ident     *const id     = id_unique("Lstr.%u");
1127         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1128         set_entity_ld_ident(entity, id);
1129         set_entity_variability(entity, variability_constant);
1130         set_entity_allocation(entity, allocation_static);
1131
1132         ir_mode *const mode      = get_type_mode(elem_type);
1133
1134         const wchar_rep_t *const string = literal->value.begin;
1135         const size_t             slen   = literal->value.size;
1136
1137         set_array_lower_bound_int(type, 0, 0);
1138         set_array_upper_bound_int(type, 0, slen);
1139         set_type_size_bytes(type, slen);
1140         set_type_state(type, layout_fixed);
1141
1142         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1143         for(size_t i = 0; i < slen; ++i) {
1144                 tvs[i] = new_tarval_from_long(string[i], mode);
1145         }
1146
1147         set_array_entity_values(entity, tvs, slen);
1148         free(tvs);
1149
1150         return create_symconst(dbgi, mode_P_data, entity);
1151 }
1152
1153 static ir_node *deref_address(type_t *const type, ir_node *const addr,
1154                               dbg_info *const dbgi)
1155 {
1156         ir_type *irtype = get_ir_type(type);
1157         if (is_compound_type(irtype)
1158                         || is_Method_type(irtype)
1159                         || is_Array_type(irtype)) {
1160                 return addr;
1161         }
1162
1163         ir_mode *const mode     = get_type_mode(irtype);
1164         ir_node *const memory   = get_store();
1165         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1166         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1167         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1168
1169         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1170                 set_Load_volatility(load, volatility_is_volatile);
1171         }
1172
1173         set_store(load_mem);
1174         return load_res;
1175 }
1176
1177 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1178 {
1179         ir_mode *mode = get_irn_mode(node);
1180
1181         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1182                 return node;
1183         if(!mode_is_float(mode))
1184                 return node;
1185
1186         /* check if there is already a Conv */
1187         if (get_irn_op(node) == op_Conv) {
1188                 /* convert it into a strict Conv */
1189                 set_Conv_strict(node, 1);
1190                 return node;
1191         }
1192
1193         /* otherwise create a new one */
1194         return new_d_strictConv(dbgi, node, mode);
1195 }
1196
1197 static ir_node *get_global_var_address(dbg_info *const dbgi,
1198                                        const declaration_t *const decl)
1199 {
1200         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1201
1202         ir_entity *const entity = decl->v.entity;
1203         switch ((storage_class_tag_t)decl->storage_class) {
1204                 case STORAGE_CLASS_THREAD:
1205                 case STORAGE_CLASS_THREAD_EXTERN:
1206                 case STORAGE_CLASS_THREAD_STATIC: {
1207                         ir_node *const no_mem = new_NoMem();
1208                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1209                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1210                 }
1211
1212                 default:
1213                         return create_symconst(dbgi, mode_P_data, entity);
1214         }
1215 }
1216
1217 /* Returns the correct base address depending on whether it is a parameter or a
1218  * normal local variable */
1219 static ir_node *get_local_frame(ir_entity *const ent)
1220 {
1221         ir_graph      *const irg   = current_ir_graph;
1222         const ir_type *const owner = get_entity_owner(ent);
1223         if (owner == get_irg_frame_type(irg)) {
1224                 return get_irg_frame(irg);
1225         } else {
1226                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1227                 return get_irg_value_param_base(irg);
1228         }
1229 }
1230
1231 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1232 {
1233         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1234         declaration_t *declaration = ref->declaration;
1235         type_t        *type        = skip_typeref(declaration->type);
1236
1237         switch((declaration_kind_t) declaration->declaration_kind) {
1238         case DECLARATION_KIND_UNKNOWN:
1239                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1240                         break;
1241                 }
1242                 get_ir_type(type);
1243                 /* FALLTHROUGH */
1244
1245         case DECLARATION_KIND_ENUM_ENTRY: {
1246                 ir_mode *const mode = get_ir_mode(type);
1247                 return new_Const(mode, declaration->v.enum_val);
1248         }
1249
1250         case DECLARATION_KIND_LOCAL_VARIABLE: {
1251                 ir_mode *const mode = get_ir_mode(type);
1252                 return get_value(declaration->v.value_number, mode);
1253         }
1254         case DECLARATION_KIND_FUNCTION: {
1255                 ir_mode *const mode = get_ir_mode(type);
1256                 return create_symconst(dbgi, mode, declaration->v.entity);
1257         }
1258         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1259                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1260                 return deref_address(declaration->type, addr, dbgi);
1261         }
1262
1263         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1264                 ir_entity *entity = declaration->v.entity;
1265                 ir_node   *frame  = get_local_frame(entity);
1266                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1267                 return deref_address(declaration->type, sel, dbgi);
1268         }
1269
1270         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1271                 return declaration->v.vla_base;
1272
1273         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1274         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1275         case DECLARATION_KIND_COMPOUND_MEMBER:
1276         case DECLARATION_KIND_LABEL_BLOCK:
1277                 panic("not implemented reference type");
1278         }
1279
1280         panic("reference to declaration with unknown type found");
1281 }
1282
1283 static ir_node *reference_addr(const reference_expression_t *ref)
1284 {
1285         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1286         declaration_t *declaration = ref->declaration;
1287
1288         switch((declaration_kind_t) declaration->declaration_kind) {
1289         case DECLARATION_KIND_UNKNOWN:
1290                 break;
1291         case DECLARATION_KIND_LOCAL_VARIABLE:
1292                 panic("local variable without entity has no address");
1293         case DECLARATION_KIND_FUNCTION: {
1294                 type_t *const  type = skip_typeref(ref->base.type);
1295                 ir_mode *const mode = get_ir_mode(type);
1296                 return create_symconst(dbgi, mode, declaration->v.entity);
1297         }
1298         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1299                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1300                 return addr;
1301         }
1302         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1303                 ir_entity *entity = declaration->v.entity;
1304                 ir_node   *frame  = get_local_frame(entity);
1305                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1306
1307                 return sel;
1308         }
1309
1310         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1311                 return declaration->v.vla_base;
1312
1313         case DECLARATION_KIND_ENUM_ENTRY:
1314                 panic("trying to reference enum entry");
1315
1316         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1317         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1318         case DECLARATION_KIND_COMPOUND_MEMBER:
1319         case DECLARATION_KIND_LABEL_BLOCK:
1320                 panic("not implemented reference type");
1321         }
1322
1323         panic("reference to declaration with unknown type found");
1324 }
1325
1326 static ir_node *process_builtin_call(const call_expression_t *call)
1327 {
1328         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1329
1330         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1331         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1332
1333         type_t *type = skip_typeref(builtin->base.type);
1334         assert(is_type_pointer(type));
1335
1336         type_t   *function_type = skip_typeref(type->pointer.points_to);
1337         symbol_t *symbol        = builtin->symbol;
1338
1339         switch(symbol->ID) {
1340         case T___builtin_alloca: {
1341                 if(call->arguments == NULL || call->arguments->next != NULL) {
1342                         panic("invalid number of parameters on __builtin_alloca");
1343                 }
1344                 expression_t *argument = call->arguments->expression;
1345                 ir_node      *size     = expression_to_firm(argument);
1346
1347                 ir_node *store  = get_store();
1348                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1349                                               stack_alloc);
1350                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1351                 set_store(proj_m);
1352                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1353
1354                 return res;
1355         }
1356         case T___builtin_nan:
1357         case T___builtin_nanf:
1358         case T___builtin_nand: {
1359                 /* Ignore string for now... */
1360                 assert(is_type_function(function_type));
1361                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1362                 tarval  *tv   = get_mode_NAN(mode);
1363                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1364                 return res;
1365         }
1366         case T___builtin_va_end:
1367                 return NULL;
1368         default:
1369                 panic("Unsupported builtin found\n");
1370         }
1371 }
1372
1373 static ir_node *call_expression_to_firm(const call_expression_t *call)
1374 {
1375         assert(get_cur_block() != NULL);
1376
1377         expression_t *function = call->function;
1378         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1379                 return process_builtin_call(call);
1380         }
1381         ir_node *callee = expression_to_firm(function);
1382
1383         type_t *type = skip_typeref(function->base.type);
1384         assert(is_type_pointer(type));
1385         pointer_type_t *pointer_type = &type->pointer;
1386         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1387         assert(is_type_function(points_to));
1388         function_type_t *function_type = &points_to->function;
1389
1390         int              n_parameters = 0;
1391         call_argument_t *argument     = call->arguments;
1392         for( ; argument != NULL; argument = argument->next) {
1393                 ++n_parameters;
1394         }
1395
1396         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1397
1398         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1399         ir_type *new_method_type = NULL;
1400         if(function_type->variadic || function_type->unspecified_parameters) {
1401                 /* we need to construct a new method type matching the call
1402                  * arguments... */
1403                 int n_res       = get_method_n_ress(ir_method_type);
1404                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1405                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1406                                                   n_parameters, n_res, dbgi);
1407                 set_method_calling_convention(new_method_type,
1408                                get_method_calling_convention(ir_method_type));
1409                 set_method_additional_properties(new_method_type,
1410                                get_method_additional_properties(ir_method_type));
1411                 set_method_variadicity(new_method_type,
1412                                        get_method_variadicity(ir_method_type));
1413
1414                 for(int i = 0; i < n_res; ++i) {
1415                         set_method_res_type(new_method_type, i,
1416                                             get_method_res_type(ir_method_type, i));
1417                 }
1418         }
1419         ir_node *in[n_parameters];
1420
1421         argument = call->arguments;
1422         int n = 0;
1423         for( ; argument != NULL; argument = argument->next) {
1424                 expression_t *expression = argument->expression;
1425                 ir_node      *arg_node   = expression_to_firm(expression);
1426
1427                 arg_node = do_strict_conv(dbgi, arg_node);
1428
1429                 in[n] = arg_node;
1430                 if(new_method_type != NULL) {
1431                         ir_type *irtype = get_ir_type(expression->base.type);
1432                         set_method_param_type(new_method_type, n, irtype);
1433                 }
1434
1435                 n++;
1436         }
1437         assert(n == n_parameters);
1438
1439         if(new_method_type != NULL)
1440                 ir_method_type = new_method_type;
1441
1442         ir_node  *store = get_store();
1443         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1444                                      ir_method_type);
1445         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1446         set_store(mem);
1447
1448         type_t  *return_type = skip_typeref(function_type->return_type);
1449         ir_node *result      = NULL;
1450
1451         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1452                 ir_mode *mode;
1453                 if(is_type_scalar(return_type)) {
1454                         mode = get_ir_mode(return_type);
1455                 } else {
1456                         mode = mode_P_data;
1457                 }
1458                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1459                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1460         }
1461
1462         return result;
1463 }
1464
1465 static void statement_to_firm(statement_t *statement);
1466 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1467
1468 static ir_node *expression_to_addr(const expression_t *expression);
1469 static void create_condition_evaluation(const expression_t *expression,
1470                                         ir_node *true_block,
1471                                         ir_node *false_block);
1472
1473 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1474                          ir_node *value)
1475 {
1476         value = do_strict_conv(dbgi, value);
1477
1478         ir_node *memory = get_store();
1479
1480         if(is_type_scalar(type)) {
1481                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1482                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1483                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1484                         set_Store_volatility(store, volatility_is_volatile);
1485                 set_store(store_mem);
1486         } else {
1487                 ir_type *irtype    = get_ir_type(type);
1488                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1489                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1490                 set_store(copyb_mem);
1491         }
1492 }
1493
1494 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1495 {
1496         tarval *all_one   = get_mode_all_one(mode);
1497         int     mode_size = get_mode_size_bits(mode);
1498
1499         assert(offset >= 0 && size >= 0);
1500         assert(offset + size <= mode_size);
1501         if(size == mode_size) {
1502                 return all_one;
1503         }
1504
1505         long    shiftr    = get_mode_size_bits(mode) - size;
1506         long    shiftl    = offset;
1507         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1508         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1509         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1510         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1511
1512         return mask1;
1513 }
1514
1515 static void bitfield_store_to_firm(const unary_expression_t *expression,
1516                                    ir_node *value)
1517 {
1518         expression_t *select = expression->value;
1519         assert(select->kind == EXPR_SELECT);
1520         type_t       *type   = select->base.type;
1521         assert(type->kind == TYPE_BITFIELD);
1522         ir_mode      *mode   = get_ir_mode(type->bitfield.base_type);
1523         ir_node      *addr   = expression_to_addr(select);
1524
1525         assert(get_irn_mode(value) == mode);
1526
1527         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1528
1529         /* kill upper bits of value and shift to right position */
1530         ir_entity *entity       = select->select.compound_entry->v.entity;
1531         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1532         ir_type   *entity_type  = get_entity_type(entity);
1533         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1534
1535         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1536         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1537         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1538         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1539         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1540         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1541
1542         /* load current value */
1543         ir_node  *mem             = get_store();
1544         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1545         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1546         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1547         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1548         tarval   *inv_mask        = tarval_not(shift_mask);
1549         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1550         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1551
1552         /* construct new value and store */
1553         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1554         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1555         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1556         set_store(store_mem);
1557
1558         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1559                 set_Load_volatility(load, volatility_is_volatile);
1560                 set_Store_volatility(store, volatility_is_volatile);
1561         }
1562 }
1563
1564 static void set_value_for_expression(const expression_t *expression,
1565                                      ir_node *value)
1566 {
1567         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1568         value          = do_strict_conv(dbgi, value);
1569
1570         if(expression->kind == EXPR_REFERENCE) {
1571                 const reference_expression_t *ref = &expression->reference;
1572
1573                 declaration_t *declaration = ref->declaration;
1574                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1575                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1576                         set_value(declaration->v.value_number, value);
1577                         return;
1578                 }
1579         }
1580
1581         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1582                 bitfield_store_to_firm(&expression->unary, value);
1583                 return;
1584         }
1585
1586         ir_node *addr = expression_to_addr(expression);
1587         type_t  *type = skip_typeref(expression->base.type);
1588         assign_value(dbgi, addr, type, value);
1589 }
1590
1591 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1592 {
1593         ir_mode *value_mode = get_irn_mode(value);
1594
1595         if (value_mode == dest_mode || is_Bad(value))
1596                 return value;
1597
1598         if(dest_mode == mode_b) {
1599                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1600                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1601                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1602                 return proj;
1603         }
1604
1605         return new_d_Conv(dbgi, value, dest_mode);
1606 }
1607
1608 static ir_node *create_incdec(const unary_expression_t *expression)
1609 {
1610         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1611         type_t       *type  = skip_typeref(expression->base.type);
1612         ir_mode      *mode  = get_ir_mode(type);
1613         expression_t *value = expression->value;
1614
1615         ir_node *value_node = expression_to_firm(value);
1616
1617         ir_node *offset;
1618         if(is_type_pointer(type)) {
1619                 pointer_type_t *pointer_type = &type->pointer;
1620                 offset                       = get_type_size(pointer_type->points_to);
1621         } else {
1622                 assert(is_type_arithmetic(type));
1623                 offset = new_Const(mode, get_mode_one(mode));
1624         }
1625
1626         switch(expression->base.kind) {
1627         case EXPR_UNARY_POSTFIX_INCREMENT: {
1628                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1629                 set_value_for_expression(value, new_value);
1630                 return value_node;
1631         }
1632         case EXPR_UNARY_POSTFIX_DECREMENT: {
1633                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1634                 set_value_for_expression(value, new_value);
1635                 return value_node;
1636         }
1637         case EXPR_UNARY_PREFIX_INCREMENT: {
1638                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1639                 set_value_for_expression(value, new_value);
1640                 return new_value;
1641         }
1642         case EXPR_UNARY_PREFIX_DECREMENT: {
1643                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1644                 set_value_for_expression(value, new_value);
1645                 return new_value;
1646         }
1647         default:
1648                 panic("no incdec expr in create_incdec");
1649                 return NULL;
1650         }
1651 }
1652
1653 static bool is_local_variable(expression_t *expression)
1654 {
1655         if (expression->kind != EXPR_REFERENCE)
1656                 return false;
1657         reference_expression_t *ref_expr    = &expression->reference;
1658         declaration_t          *declaration = ref_expr->declaration;
1659         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1660 }
1661
1662 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1663 {
1664         switch(kind) {
1665         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1666         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1667         case EXPR_BINARY_NOTEQUAL:
1668                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1669         case EXPR_BINARY_ISLESS:
1670         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1671         case EXPR_BINARY_ISLESSEQUAL:
1672         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1673         case EXPR_BINARY_ISGREATER:
1674         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1675         case EXPR_BINARY_ISGREATEREQUAL:
1676         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1677         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1678
1679         default:
1680                 break;
1681         }
1682         panic("trying to get pn_Cmp from non-comparison binexpr type");
1683 }
1684
1685 /**
1686  * Handle the assume optimizer hint: check if a Confirm
1687  * node can be created.
1688  *
1689  * @param dbi    debug info
1690  * @param expr   the IL assume expression
1691  *
1692  * we support here only some simple cases:
1693  *  - var rel const
1694  *  - const rel val
1695  *  - var rel var
1696  */
1697 static ir_node *handle_assume_compare(dbg_info *dbi,
1698                                       const binary_expression_t *expression)
1699 {
1700         expression_t  *op1 = expression->left;
1701         expression_t  *op2 = expression->right;
1702         declaration_t *var2, *var = NULL;
1703         ir_node       *res = NULL;
1704         pn_Cmp         cmp_val;
1705
1706         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1707
1708         if (is_local_variable(op1) && is_local_variable(op2)) {
1709         var  = op1->reference.declaration;
1710             var2 = op2->reference.declaration;
1711
1712                 type_t  *const type = skip_typeref(var->type);
1713                 ir_mode *const mode = get_ir_mode(type);
1714
1715                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1716                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1717
1718                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1719                 set_value(var2->v.value_number, res);
1720
1721                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1722                 set_value(var->v.value_number, res);
1723
1724                 return res;
1725         }
1726
1727         expression_t *con;
1728         if (is_local_variable(op1) && is_constant_expression(op2)) {
1729                 var = op1->reference.declaration;
1730                 con = op2;
1731         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1732                 cmp_val = get_inversed_pnc(cmp_val);
1733                 var = op2->reference.declaration;
1734                 con = op1;
1735         }
1736
1737         if (var != NULL) {
1738                 type_t  *const type = skip_typeref(var->type);
1739                 ir_mode *const mode = get_ir_mode(type);
1740
1741                 res = get_value(var->v.value_number, mode);
1742                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1743                 set_value(var->v.value_number, res);
1744         }
1745         return res;
1746 }
1747
1748 /**
1749  * Handle the assume optimizer hint.
1750  *
1751  * @param dbi    debug info
1752  * @param expr   the IL assume expression
1753  */
1754 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1755         switch(expression->kind) {
1756         case EXPR_BINARY_EQUAL:
1757         case EXPR_BINARY_NOTEQUAL:
1758         case EXPR_BINARY_LESS:
1759         case EXPR_BINARY_LESSEQUAL:
1760         case EXPR_BINARY_GREATER:
1761         case EXPR_BINARY_GREATEREQUAL:
1762                 return handle_assume_compare(dbi, &expression->binary);
1763         default:
1764                 return NULL;
1765         }
1766 }
1767
1768 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1769 {
1770         expression_t *select = expression->value;
1771         assert(select->kind == EXPR_SELECT);
1772
1773         type_t   *type     = select->base.type;
1774         assert(type->kind == TYPE_BITFIELD);
1775         ir_mode  *mode     = get_ir_mode(type->bitfield.base_type);
1776         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1777         ir_node  *addr     = expression_to_addr(select);
1778         ir_node  *mem      = get_store();
1779         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1780         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1781         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1782
1783         load_res           = create_conv(dbgi, load_res, mode_int);
1784
1785         set_store(load_mem);
1786
1787         /* kill upper bits */
1788         ir_entity *entity       = select->select.compound_entry->v.entity;
1789         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1790         ir_type   *entity_type  = get_entity_type(entity);
1791         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1792         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1793         assert(shift_bitsl >= 0);
1794         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1795         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1796         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1797
1798         long       shift_bitsr  = bitoffset + shift_bitsl;
1799         assert(shift_bitsr <= (long) machine_size);
1800         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1801         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1802         ir_node   *shiftr;
1803         if(mode_is_signed(mode)) {
1804                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1805         } else {
1806                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1807         }
1808
1809         return create_conv(dbgi, shiftr, mode);
1810 }
1811
1812 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1813 {
1814         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1815         type_t   *type = skip_typeref(expression->base.type);
1816
1817         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1818                 return expression_to_addr(expression->value);
1819
1820         const expression_t *value = expression->value;
1821
1822         switch(expression->base.kind) {
1823         case EXPR_UNARY_NEGATE: {
1824                 ir_node *value_node = expression_to_firm(value);
1825                 ir_mode *mode = get_ir_mode(type);
1826                 return new_d_Minus(dbgi, value_node, mode);
1827         }
1828         case EXPR_UNARY_PLUS:
1829                 return expression_to_firm(value);
1830         case EXPR_UNARY_BITWISE_NEGATE: {
1831                 ir_node *value_node = expression_to_firm(value);
1832                 ir_mode *mode = get_ir_mode(type);
1833                 return new_d_Not(dbgi, value_node, mode);
1834         }
1835         case EXPR_UNARY_NOT: {
1836                 ir_node *value_node = expression_to_firm(value);
1837                 ir_mode *mode = get_ir_mode(type);
1838                 if(get_irn_mode(value_node) != mode_b) {
1839                         value_node = create_conv(dbgi, value_node, mode_b);
1840                 }
1841                 value_node = new_d_Not(dbgi, value_node, mode_b);
1842                 if(mode != mode_b) {
1843                         value_node = create_conv(dbgi, value_node, mode);
1844                 }
1845                 return value_node;
1846         }
1847         case EXPR_UNARY_DEREFERENCE: {
1848                 ir_node *value_node = expression_to_firm(value);
1849                 type_t  *value_type = skip_typeref(value->base.type);
1850                 assert(is_type_pointer(value_type));
1851                 type_t  *points_to  = value_type->pointer.points_to;
1852                 return deref_address(points_to, value_node, dbgi);
1853         }
1854         case EXPR_UNARY_POSTFIX_INCREMENT:
1855         case EXPR_UNARY_POSTFIX_DECREMENT:
1856         case EXPR_UNARY_PREFIX_INCREMENT:
1857         case EXPR_UNARY_PREFIX_DECREMENT:
1858                 return create_incdec(expression);
1859         case EXPR_UNARY_CAST: {
1860                 ir_node *value_node = expression_to_firm(value);
1861                 if(is_type_scalar(type)) {
1862                         ir_mode *mode = get_ir_mode(type);
1863                         ir_node *node = create_conv(dbgi, value_node, mode);
1864                         node = do_strict_conv(dbgi, node);
1865                         return node;
1866                 } else {
1867                         /* make sure firm type is constructed */
1868                         (void) get_ir_type(type);
1869                         return value_node;
1870                 }
1871         }
1872         case EXPR_UNARY_CAST_IMPLICIT: {
1873                 ir_node *value_node = expression_to_firm(value);
1874                 if(is_type_scalar(type)) {
1875                         ir_mode *mode = get_ir_mode(type);
1876                         return create_conv(dbgi, value_node, mode);
1877                 } else {
1878                         return value_node;
1879                 }
1880         }
1881         case EXPR_UNARY_ASSUME:
1882                 if(firm_opt.confirm)
1883                         return handle_assume(dbgi, value);
1884                 else
1885                         return NULL;
1886         case EXPR_UNARY_BITFIELD_EXTRACT:
1887                 return bitfield_extract_to_firm(expression);
1888
1889         default:
1890                 break;
1891         }
1892         panic("invalid UNEXPR type found");
1893 }
1894
1895 static ir_node *produce_condition_result(const expression_t *expression,
1896                                          dbg_info *dbgi)
1897 {
1898         ir_mode *mode      = get_ir_mode(expression->base.type);
1899         ir_node *cur_block = get_cur_block();
1900
1901         ir_node *one_block = new_immBlock();
1902         ir_node *one       = new_Const(mode, get_mode_one(mode));
1903         ir_node *jmp_one   = new_d_Jmp(dbgi);
1904
1905         ir_node *zero_block = new_immBlock();
1906         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1907         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1908
1909         set_cur_block(cur_block);
1910         create_condition_evaluation(expression, one_block, zero_block);
1911         mature_immBlock(one_block);
1912         mature_immBlock(zero_block);
1913
1914         ir_node *common_block = new_immBlock();
1915         add_immBlock_pred(common_block, jmp_one);
1916         add_immBlock_pred(common_block, jmp_zero);
1917         mature_immBlock(common_block);
1918
1919         ir_node *in[2] = { one, zero };
1920         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1921
1922         return val;
1923 }
1924
1925 static ir_node *create_lazy_op(const binary_expression_t *expression)
1926 {
1927         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1928         type_t   *type = expression->base.type;
1929         ir_mode  *mode = get_ir_mode(type);
1930
1931         if(is_constant_expression(expression->left)) {
1932                 long val = fold_constant(expression->left);
1933                 expression_kind_t ekind = expression->base.kind;
1934                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1935                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1936                         return expression_to_firm(expression->right);
1937                 } else {
1938                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1939                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1940                         return new_Const(mode, get_mode_one(mode));
1941                 }
1942         }
1943
1944         return produce_condition_result((const expression_t*) expression, dbgi);
1945 }
1946
1947 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1948                                             ir_node *right, ir_mode *mode);
1949
1950 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1951                                         create_arithmetic_func func)
1952 {
1953         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1954         ir_node  *left  = expression_to_firm(expression->left);
1955         ir_node  *right = expression_to_firm(expression->right);
1956         type_t   *type  = expression->right->base.type;
1957         /* be careful with the modes, because in arithmetic assign nodes only
1958          * the right operand has the mode of the arithmetic already */
1959         ir_mode  *mode  = get_ir_mode(type);
1960         left            = create_conv(dbgi, left, mode);
1961         ir_node  *res   = func(dbgi, left, right, mode);
1962
1963         return res;
1964 }
1965
1966 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1967                                    ir_node  *      integer,
1968                                    type_t   *const type,
1969                                    dbg_info *const dbgi,
1970                                    const create_arithmetic_func func)
1971 {
1972         pointer_type_t *const pointer_type = &type->pointer;
1973         type_t         *const points_to    = pointer_type->points_to;
1974         const unsigned        elem_size    = get_type_size_const(points_to);
1975
1976         assert(elem_size >= 1);
1977         if (elem_size > 1) {
1978                 integer             = create_conv(dbgi, integer, mode_int);
1979                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1980                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1981                 integer = mul;
1982         }
1983
1984         ir_mode *const mode = get_ir_mode(type);
1985         return func(dbgi, pointer, integer, mode);
1986 }
1987
1988 static ir_node *create_arithmetic_assign_binop(
1989                 const binary_expression_t *expression, create_arithmetic_func func)
1990 {
1991         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1992         type_t   *const type = skip_typeref(expression->base.type);
1993         ir_node  *value;
1994
1995         if (is_type_pointer(type)) {
1996                 ir_node *const pointer = expression_to_firm(expression->left);
1997                 ir_node *      integer = expression_to_firm(expression->right);
1998                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1999         } else {
2000                 value = create_arithmetic_binop(expression, func);
2001         }
2002
2003         ir_mode *const mode = get_ir_mode(type);
2004         value = create_conv(dbgi, value, mode);
2005         set_value_for_expression(expression->left, value);
2006
2007         return value;
2008 }
2009
2010 static ir_node *create_add(const binary_expression_t *expression)
2011 {
2012         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2013         ir_node  *left  = expression_to_firm(expression->left);
2014         ir_node  *right = expression_to_firm(expression->right);
2015         type_t   *type  = expression->base.type;
2016
2017         expression_t *expr_left  = expression->left;
2018         expression_t *expr_right = expression->right;
2019         type_t       *type_left  = skip_typeref(expr_left->base.type);
2020         type_t       *type_right = skip_typeref(expr_right->base.type);
2021
2022         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2023                 ir_mode *const mode = get_ir_mode(type);
2024                 return new_d_Add(dbgi, left, right, mode);
2025         }
2026
2027         if (is_type_pointer(type_left)) {
2028                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2029         } else {
2030                 assert(is_type_pointer(type_right));
2031                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2032         }
2033 }
2034
2035 static ir_node *create_sub(const binary_expression_t *expression)
2036 {
2037         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2038         expression_t *const expr_left  = expression->left;
2039         expression_t *const expr_right = expression->right;
2040         ir_node      *const left       = expression_to_firm(expr_left);
2041         ir_node      *const right      = expression_to_firm(expr_right);
2042         type_t       *const type       = expression->base.type;
2043         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2044         type_t       *const type_right = skip_typeref(expr_right->base.type);
2045
2046         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2047                 ir_mode *const mode = get_ir_mode(type);
2048                 return new_d_Sub(dbgi, left, right, mode);
2049         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2050                 const pointer_type_t *const ptr_type = &type_left->pointer;
2051
2052                 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2053                 ir_mode *const mode      = get_ir_mode(type);
2054                 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2055                 ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2056                 ir_node *const no_mem    = new_NoMem();
2057                 ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2058                                                        op_pin_state_floats);
2059                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2060         }
2061
2062         assert(is_type_pointer(type_left));
2063         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2064 }
2065
2066 static ir_node *create_shift(const binary_expression_t *expression)
2067 {
2068         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2069         ir_node  *left  = expression_to_firm(expression->left);
2070         ir_node  *right = expression_to_firm(expression->right);
2071         type_t   *type  = expression->base.type;
2072         ir_mode  *mode  = get_ir_mode(type);
2073
2074         /* firm always wants the shift count to be unsigned */
2075         right = create_conv(dbgi, right, mode_uint);
2076
2077         ir_node *res;
2078
2079         switch(expression->base.kind) {
2080         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2081         case EXPR_BINARY_SHIFTLEFT:
2082                 res = new_d_Shl(dbgi, left, right, mode);
2083                 break;
2084         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2085         case EXPR_BINARY_SHIFTRIGHT: {
2086                  expression_t *expr_left = expression->left;
2087                  type_t       *type_left = skip_typeref(expr_left->base.type);
2088
2089                  if(is_type_signed(type_left)) {
2090                         res = new_d_Shrs(dbgi, left, right, mode);
2091                  } else {
2092                          res = new_d_Shr(dbgi, left, right, mode);
2093                  }
2094                  break;
2095         }
2096         default:
2097                 panic("create shift op called for non-shift op");
2098         }
2099
2100         return res;
2101 }
2102
2103
2104 static ir_node *create_divmod(const binary_expression_t *expression)
2105 {
2106         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2107         ir_node  *left  = expression_to_firm(expression->left);
2108         ir_node  *right = expression_to_firm(expression->right);
2109         ir_node  *pin   = new_Pin(new_NoMem());
2110         /* be careful with the modes, because in arithmetic assign nodes only
2111          * the right operand has the mode of the arithmetic already */
2112         type_t   *type  = expression->right->base.type;
2113         ir_mode  *mode  = get_ir_mode(type);
2114         left            = create_conv(dbgi, left, mode);
2115         ir_node  *op;
2116         ir_node  *res;
2117
2118         switch (expression->base.kind) {
2119         case EXPR_BINARY_DIV:
2120         case EXPR_BINARY_DIV_ASSIGN:
2121                 if(mode_is_float(mode)) {
2122                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2123                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2124                 } else {
2125                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2126                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2127                 }
2128                 break;
2129
2130         case EXPR_BINARY_MOD:
2131         case EXPR_BINARY_MOD_ASSIGN:
2132                 assert(!mode_is_float(mode));
2133                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2134                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2135                 break;
2136
2137         default: panic("unexpected binary expression type in create_divmod()");
2138         }
2139
2140         return res;
2141 }
2142
2143 static ir_node *create_arithmetic_assign_divmod(
2144                 const binary_expression_t *expression)
2145 {
2146         ir_node  *      value = create_divmod(expression);
2147         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2148         type_t   *const type  = expression->base.type;
2149         ir_mode  *const mode  = get_ir_mode(type);
2150
2151         assert(type->kind != TYPE_POINTER);
2152
2153         value = create_conv(dbgi, value, mode);
2154         set_value_for_expression(expression->left, value);
2155
2156         return value;
2157 }
2158
2159 static ir_node *create_arithmetic_assign_shift(
2160                 const binary_expression_t *expression)
2161 {
2162         ir_node  *      value = create_shift(expression);
2163         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2164         type_t   *const type  = expression->base.type;
2165         ir_mode  *const mode  = get_ir_mode(type);
2166
2167         value = create_conv(dbgi, value, mode);
2168         set_value_for_expression(expression->left, value);
2169
2170         return value;
2171 }
2172
2173 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2174 {
2175         expression_kind_t kind = expression->base.kind;
2176
2177         switch(kind) {
2178         case EXPR_BINARY_EQUAL:
2179         case EXPR_BINARY_NOTEQUAL:
2180         case EXPR_BINARY_LESS:
2181         case EXPR_BINARY_LESSEQUAL:
2182         case EXPR_BINARY_GREATER:
2183         case EXPR_BINARY_GREATEREQUAL:
2184         case EXPR_BINARY_ISGREATER:
2185         case EXPR_BINARY_ISGREATEREQUAL:
2186         case EXPR_BINARY_ISLESS:
2187         case EXPR_BINARY_ISLESSEQUAL:
2188         case EXPR_BINARY_ISLESSGREATER:
2189         case EXPR_BINARY_ISUNORDERED: {
2190                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2191                 ir_node *left  = expression_to_firm(expression->left);
2192                 ir_node *right = expression_to_firm(expression->right);
2193                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2194                 long     pnc   = get_pnc(kind, expression->left->base.type);
2195                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2196                 return proj;
2197         }
2198         case EXPR_BINARY_ASSIGN: {
2199                 ir_node *right = expression_to_firm(expression->right);
2200                 set_value_for_expression(expression->left, right);
2201
2202                 return right;
2203         }
2204         case EXPR_BINARY_ADD:
2205                 return create_add(expression);
2206         case EXPR_BINARY_SUB:
2207                 return create_sub(expression);
2208         case EXPR_BINARY_MUL:
2209                 return create_arithmetic_binop(expression, new_d_Mul);
2210         case EXPR_BINARY_BITWISE_AND:
2211                 return create_arithmetic_binop(expression, new_d_And);
2212         case EXPR_BINARY_BITWISE_OR:
2213                 return create_arithmetic_binop(expression, new_d_Or);
2214         case EXPR_BINARY_BITWISE_XOR:
2215                 return create_arithmetic_binop(expression, new_d_Eor);
2216         case EXPR_BINARY_SHIFTLEFT:
2217         case EXPR_BINARY_SHIFTRIGHT:
2218                 return create_shift(expression);
2219         case EXPR_BINARY_DIV:
2220         case EXPR_BINARY_MOD:
2221                 return create_divmod(expression);
2222         case EXPR_BINARY_LOGICAL_AND:
2223         case EXPR_BINARY_LOGICAL_OR:
2224                 return create_lazy_op(expression);
2225         case EXPR_BINARY_COMMA:
2226                 expression_to_firm(expression->left);
2227                 return expression_to_firm(expression->right);
2228         case EXPR_BINARY_ADD_ASSIGN:
2229                 return create_arithmetic_assign_binop(expression, new_d_Add);
2230         case EXPR_BINARY_SUB_ASSIGN:
2231                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2232         case EXPR_BINARY_MUL_ASSIGN:
2233                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2234         case EXPR_BINARY_MOD_ASSIGN:
2235         case EXPR_BINARY_DIV_ASSIGN:
2236                 return create_arithmetic_assign_divmod(expression);
2237         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2238                 return create_arithmetic_assign_binop(expression, new_d_And);
2239         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2240                 return create_arithmetic_assign_binop(expression, new_d_Or);
2241         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2242                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2243         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2244         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2245                 return create_arithmetic_assign_shift(expression);
2246         case EXPR_BINARY_BUILTIN_EXPECT:
2247                 return expression_to_firm(expression->left);
2248         default:
2249                 panic("TODO binexpr type");
2250         }
2251 }
2252
2253 static ir_node *array_access_addr(const array_access_expression_t *expression)
2254 {
2255         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2256         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2257         ir_node  *offset    = expression_to_firm(expression->index);
2258         offset              = create_conv(dbgi, offset, mode_uint);
2259
2260         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2261         assert(is_type_pointer(ref_type));
2262         pointer_type_t *pointer_type = &ref_type->pointer;
2263
2264         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2265         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2266                                              mode_uint);
2267         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2268
2269         return result;
2270 }
2271
2272 static ir_node *array_access_to_firm(
2273                 const array_access_expression_t *expression)
2274 {
2275         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2276         ir_node  *addr   = array_access_addr(expression);
2277         type_t   *type   = revert_automatic_type_conversion(
2278                         (const expression_t*) expression);
2279         type             = skip_typeref(type);
2280
2281         return deref_address(type, addr, dbgi);
2282 }
2283
2284 static long get_offsetof_offset(const offsetof_expression_t *expression)
2285 {
2286         type_t *orig_type = expression->type;
2287         long    offset    = 0;
2288
2289         designator_t *designator = expression->designator;
2290         for( ; designator != NULL; designator = designator->next) {
2291                 type_t *type = skip_typeref(orig_type);
2292                 /* be sure the type is constructed */
2293                 (void) get_ir_type(type);
2294
2295                 if(designator->symbol != NULL) {
2296                         assert(is_type_compound(type));
2297                         symbol_t *symbol = designator->symbol;
2298
2299                         declaration_t *declaration = type->compound.declaration;
2300                         declaration_t *iter        = declaration->scope.declarations;
2301                         for( ; iter != NULL; iter = iter->next) {
2302                                 if(iter->symbol == symbol) {
2303                                         break;
2304                                 }
2305                         }
2306                         assert(iter != NULL);
2307
2308                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2309                         offset += get_entity_offset(iter->v.entity);
2310
2311                         orig_type = iter->type;
2312                 } else {
2313                         expression_t *array_index = designator->array_index;
2314                         assert(designator->array_index != NULL);
2315                         assert(is_type_array(type));
2316                         assert(is_type_valid(array_index->base.type));
2317
2318                         long index         = fold_constant(array_index);
2319                         ir_type *arr_type  = get_ir_type(type);
2320                         ir_type *elem_type = get_array_element_type(arr_type);
2321                         long     elem_size = get_type_size_bytes(elem_type);
2322
2323                         offset += index * elem_size;
2324
2325                         orig_type = type->array.element_type;
2326                 }
2327         }
2328
2329         return offset;
2330 }
2331
2332 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2333 {
2334         ir_mode  *mode   = get_ir_mode(expression->base.type);
2335         long      offset = get_offsetof_offset(expression);
2336         tarval   *tv     = new_tarval_from_long(offset, mode);
2337         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2338
2339         return new_d_Const(dbgi, mode, tv);
2340 }
2341
2342 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2343                                      ir_entity *entity, type_t *type);
2344
2345 static ir_node *compound_literal_to_firm(
2346                 const compound_literal_expression_t *expression)
2347 {
2348         type_t *type = expression->type;
2349
2350         /* create an entity on the stack */
2351         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2352
2353         ident     *const id     = id_unique("CompLit.%u");
2354         ir_type   *const irtype = get_ir_type(type);
2355         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2356         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2357         set_entity_ld_ident(entity, id);
2358
2359         set_entity_variability(entity, variability_uninitialized);
2360
2361         /* create initialisation code */
2362         initializer_t *initializer = expression->initializer;
2363         create_local_initializer(initializer, dbgi, entity, type);
2364
2365         /* create a sel for the compound literal address */
2366         ir_node *frame = get_local_frame(entity);
2367         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2368         return sel;
2369 }
2370
2371 /**
2372  * Transform a sizeof expression into Firm code.
2373  */
2374 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2375 {
2376         type_t *type = expression->type;
2377         if(type == NULL) {
2378                 type = expression->tp_expression->base.type;
2379                 assert(type != NULL);
2380         }
2381
2382         type = skip_typeref(type);
2383         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2384         if(is_type_array(type) && type->array.is_vla
2385                         && expression->tp_expression != NULL) {
2386                 expression_to_firm(expression->tp_expression);
2387         }
2388
2389         return get_type_size(type);
2390 }
2391
2392 /**
2393  * Transform an alignof expression into Firm code.
2394  */
2395 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2396 {
2397         type_t *type = expression->type;
2398         if(type == NULL) {
2399                 /* beware: if expression is a variable reference, return the
2400                    alignment of the variable. */
2401                 const expression_t *tp_expression = expression->tp_expression;
2402                 const declaration_t *declaration = expr_is_variable(tp_expression);
2403                 if (declaration != NULL) {
2404                         /* TODO: get the alignment of this variable. */
2405                 }
2406                 type = tp_expression->base.type;
2407                 assert(type != NULL);
2408         }
2409
2410         ir_mode *const mode = get_ir_mode(expression->base.type);
2411         symconst_symbol sym;
2412         sym.type_p = get_ir_type(type);
2413         return new_SymConst(mode, sym, symconst_type_align);
2414 }
2415
2416 static void init_ir_types(void);
2417 long fold_constant(const expression_t *expression)
2418 {
2419         init_ir_types();
2420
2421         assert(is_constant_expression(expression));
2422
2423         ir_graph *old_current_ir_graph = current_ir_graph;
2424         if(current_ir_graph == NULL) {
2425                 current_ir_graph = get_const_code_irg();
2426         }
2427
2428         ir_node *cnst = expression_to_firm(expression);
2429         current_ir_graph = old_current_ir_graph;
2430
2431         if(!is_Const(cnst)) {
2432                 panic("couldn't fold constant\n");
2433         }
2434
2435         tarval *tv = get_Const_tarval(cnst);
2436         if(!tarval_is_long(tv)) {
2437                 panic("result of constant folding is not integer\n");
2438         }
2439
2440         return get_tarval_long(tv);
2441 }
2442
2443 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2444 {
2445         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2446
2447         /* first try to fold a constant condition */
2448         if(is_constant_expression(expression->condition)) {
2449                 long val = fold_constant(expression->condition);
2450                 if(val) {
2451                         return expression_to_firm(expression->true_expression);
2452                 } else {
2453                         return expression_to_firm(expression->false_expression);
2454                 }
2455         }
2456
2457         ir_node *cur_block   = get_cur_block();
2458
2459         /* create the true block */
2460         ir_node *true_block  = new_immBlock();
2461
2462         ir_node *true_val = expression_to_firm(expression->true_expression);
2463         ir_node *true_jmp = new_Jmp();
2464
2465         /* create the false block */
2466         ir_node *false_block = new_immBlock();
2467
2468         ir_node *false_val = expression_to_firm(expression->false_expression);
2469         ir_node *false_jmp = new_Jmp();
2470
2471         /* create the condition evaluation */
2472         set_cur_block(cur_block);
2473         create_condition_evaluation(expression->condition, true_block, false_block);
2474         mature_immBlock(true_block);
2475         mature_immBlock(false_block);
2476
2477         /* create the common block */
2478         ir_node *common_block = new_immBlock();
2479         add_immBlock_pred(common_block, true_jmp);
2480         add_immBlock_pred(common_block, false_jmp);
2481         mature_immBlock(common_block);
2482
2483         /* TODO improve static semantics, so either both or no values are NULL */
2484         if (true_val == NULL || false_val == NULL)
2485                 return NULL;
2486
2487         ir_node *in[2] = { true_val, false_val };
2488         ir_mode *mode  = get_irn_mode(true_val);
2489         assert(get_irn_mode(false_val) == mode);
2490         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2491
2492         return val;
2493 }
2494
2495 static ir_node *select_addr(const select_expression_t *expression)
2496 {
2497         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2498
2499         ir_node *compound_addr = expression_to_firm(expression->compound);
2500
2501         /* make sure the type is constructed */
2502         type_t *type = skip_typeref(expression->compound->base.type);
2503         if (is_type_pointer(type)) {
2504                 type = type->pointer.points_to;
2505         }
2506         (void) get_ir_type(type);
2507
2508         declaration_t *entry = expression->compound_entry;
2509         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2510         ir_entity     *entity = entry->v.entity;
2511
2512         assert(entity != NULL);
2513
2514         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2515
2516         return sel;
2517 }
2518
2519 static ir_node *select_to_firm(const select_expression_t *expression)
2520 {
2521         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2522         ir_node  *addr   = select_addr(expression);
2523         type_t   *type   = revert_automatic_type_conversion(
2524                         (const expression_t*) expression);
2525         type             = skip_typeref(type);
2526
2527         return deref_address(type, addr, dbgi);
2528 }
2529
2530 /* Values returned by __builtin_classify_type. */
2531 typedef enum gcc_type_class
2532 {
2533         no_type_class = -1,
2534         void_type_class,
2535         integer_type_class,
2536         char_type_class,
2537         enumeral_type_class,
2538         boolean_type_class,
2539         pointer_type_class,
2540         reference_type_class,
2541         offset_type_class,
2542         real_type_class,
2543         complex_type_class,
2544         function_type_class,
2545         method_type_class,
2546         record_type_class,
2547         union_type_class,
2548         array_type_class,
2549         string_type_class,
2550         set_type_class,
2551         file_type_class,
2552         lang_type_class
2553 } gcc_type_class;
2554
2555 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2556 {
2557         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2558
2559         gcc_type_class tc;
2560         switch (type->kind)
2561         {
2562                 case TYPE_ATOMIC: {
2563                         const atomic_type_t *const atomic_type = &type->atomic;
2564                         switch (atomic_type->akind) {
2565                                 /* should not be reached */
2566                                 case ATOMIC_TYPE_INVALID:
2567                                         tc = no_type_class;
2568                                         goto make_const;
2569
2570                                 /* gcc cannot do that */
2571                                 case ATOMIC_TYPE_VOID:
2572                                         tc = void_type_class;
2573                                         goto make_const;
2574
2575                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2576                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2577                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2578                                 case ATOMIC_TYPE_SHORT:
2579                                 case ATOMIC_TYPE_USHORT:
2580                                 case ATOMIC_TYPE_INT:
2581                                 case ATOMIC_TYPE_UINT:
2582                                 case ATOMIC_TYPE_LONG:
2583                                 case ATOMIC_TYPE_ULONG:
2584                                 case ATOMIC_TYPE_LONGLONG:
2585                                 case ATOMIC_TYPE_ULONGLONG:
2586                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2587                                         tc = integer_type_class;
2588                                         goto make_const;
2589
2590                                 case ATOMIC_TYPE_FLOAT:
2591                                 case ATOMIC_TYPE_DOUBLE:
2592                                 case ATOMIC_TYPE_LONG_DOUBLE:
2593                                         tc = real_type_class;
2594                                         goto make_const;
2595                         }
2596                         panic("Unexpected atomic type in classify_type_to_firm().");
2597                 }
2598
2599                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2600                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2601                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2602                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2603                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2604                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2605                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2606                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2607
2608                 /* gcc handles this as integer */
2609                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2610
2611                 case TYPE_BUILTIN:
2612                 /* typedef/typeof should be skipped already */
2613                 case TYPE_TYPEDEF:
2614                 case TYPE_TYPEOF:
2615                 case TYPE_INVALID:
2616                 case TYPE_ERROR:
2617                         break;
2618         }
2619         panic("unexpected TYPE classify_type_to_firm().");
2620
2621 make_const: ;
2622         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2623         ir_mode  *const mode = mode_int;
2624         tarval   *const tv   = new_tarval_from_long(tc, mode);
2625         return new_d_Const(dbgi, mode, tv);
2626 }
2627
2628 static ir_node *function_name_to_firm(
2629                 const funcname_expression_t *const expr)
2630 {
2631         switch(expr->kind) {
2632         case FUNCNAME_FUNCTION:
2633         case FUNCNAME_PRETTY_FUNCTION:
2634         case FUNCNAME_FUNCDNAME:
2635                 if (current_function_name == NULL) {
2636                         const source_position_t *const src_pos = &expr->base.source_position;
2637                         const char *const name = current_function_decl->symbol->string;
2638                         const string_t string = { name, strlen(name) + 1 };
2639                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2640                 }
2641                 return current_function_name;
2642         case FUNCNAME_FUNCSIG:
2643                 if (current_funcsig == NULL) {
2644                         const source_position_t *const src_pos = &expr->base.source_position;
2645                         ir_entity *ent = get_irg_entity(current_ir_graph);
2646                         const char *const name = get_entity_ld_name(ent);
2647                         const string_t string = { name, strlen(name) + 1 };
2648                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2649                 }
2650                 return current_funcsig;
2651         }
2652         panic("Unsupported function name");
2653 }
2654
2655 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2656 {
2657         statement_t *statement = expr->statement;
2658
2659         assert(statement->kind == STATEMENT_COMPOUND);
2660         return compound_statement_to_firm(&statement->compound);
2661 }
2662
2663 static ir_node *va_start_expression_to_firm(
2664         const va_start_expression_t *const expr)
2665 {
2666         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2667         int        const n           = get_method_n_params(method_type) - 1;
2668         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2669         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2670         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2671         ir_node   *const no_mem      = new_NoMem();
2672         ir_node   *const arg_sel     =
2673                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2674
2675         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2676         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2677         set_value_for_expression(expr->ap, add);
2678
2679         return NULL;
2680 }
2681
2682 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2683 {
2684         type_t   *const type   = expr->base.type;
2685         ir_node  *const ap     = expression_to_firm(expr->ap);
2686         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2687         ir_node  *const res    = deref_address(type, ap, dbgi);
2688
2689         ir_node  *const cnst   = get_type_size(expr->base.type);
2690         ir_node  *const add    = new_d_Add(dbgi, ap, cnst, mode_P_data);
2691         set_value_for_expression(expr->ap, add);
2692
2693         return res;
2694 }
2695
2696 static ir_node *dereference_addr(const unary_expression_t *const expression)
2697 {
2698         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2699         return expression_to_firm(expression->value);
2700 }
2701
2702 static ir_node *expression_to_addr(const expression_t *expression)
2703 {
2704         switch(expression->kind) {
2705         case EXPR_REFERENCE:
2706                 return reference_addr(&expression->reference);
2707         case EXPR_ARRAY_ACCESS:
2708                 return array_access_addr(&expression->array_access);
2709         case EXPR_SELECT:
2710                 return select_addr(&expression->select);
2711         case EXPR_CALL:
2712                 return call_expression_to_firm(&expression->call);
2713         case EXPR_UNARY_DEREFERENCE: {
2714                 return dereference_addr(&expression->unary);
2715         }
2716         default:
2717                 break;
2718         }
2719         panic("trying to get address of non-lvalue");
2720 }
2721
2722 static ir_node *builtin_constant_to_firm(
2723                 const builtin_constant_expression_t *expression)
2724 {
2725         ir_mode *mode = get_ir_mode(expression->base.type);
2726         long     v;
2727
2728         if (is_constant_expression(expression->value)) {
2729                 v = 1;
2730         } else {
2731                 v = 0;
2732         }
2733         return new_Const_long(mode, v);
2734 }
2735
2736 static ir_node *builtin_prefetch_to_firm(
2737                 const builtin_prefetch_expression_t *expression)
2738 {
2739         ir_node *adr = expression_to_firm(expression->adr);
2740         /* no Firm support for prefetch yet */
2741         (void) adr;
2742         return NULL;
2743 }
2744
2745 static ir_node *_expression_to_firm(const expression_t *expression)
2746 {
2747         switch(expression->kind) {
2748         case EXPR_CHARACTER_CONSTANT:
2749                 return character_constant_to_firm(&expression->conste);
2750         case EXPR_WIDE_CHARACTER_CONSTANT:
2751                 return wide_character_constant_to_firm(&expression->conste);
2752         case EXPR_CONST:
2753                 return const_to_firm(&expression->conste);
2754         case EXPR_STRING_LITERAL:
2755                 return string_literal_to_firm(&expression->string);
2756         case EXPR_WIDE_STRING_LITERAL:
2757                 return wide_string_literal_to_firm(&expression->wide_string);
2758         case EXPR_REFERENCE:
2759                 return reference_expression_to_firm(&expression->reference);
2760         case EXPR_CALL:
2761                 return call_expression_to_firm(&expression->call);
2762         EXPR_UNARY_CASES
2763                 return unary_expression_to_firm(&expression->unary);
2764         EXPR_BINARY_CASES
2765                 return binary_expression_to_firm(&expression->binary);
2766         case EXPR_ARRAY_ACCESS:
2767                 return array_access_to_firm(&expression->array_access);
2768         case EXPR_SIZEOF:
2769                 return sizeof_to_firm(&expression->typeprop);
2770         case EXPR_ALIGNOF:
2771                 return alignof_to_firm(&expression->typeprop);
2772         case EXPR_CONDITIONAL:
2773                 return conditional_to_firm(&expression->conditional);
2774         case EXPR_SELECT:
2775                 return select_to_firm(&expression->select);
2776         case EXPR_CLASSIFY_TYPE:
2777                 return classify_type_to_firm(&expression->classify_type);
2778         case EXPR_FUNCNAME:
2779                 return function_name_to_firm(&expression->funcname);
2780         case EXPR_STATEMENT:
2781                 return statement_expression_to_firm(&expression->statement);
2782         case EXPR_VA_START:
2783                 return va_start_expression_to_firm(&expression->va_starte);
2784         case EXPR_VA_ARG:
2785                 return va_arg_expression_to_firm(&expression->va_arge);
2786         case EXPR_BUILTIN_SYMBOL:
2787                 panic("unimplemented expression found");
2788         case EXPR_BUILTIN_CONSTANT_P:
2789                 return builtin_constant_to_firm(&expression->builtin_constant);
2790         case EXPR_BUILTIN_PREFETCH:
2791                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2792         case EXPR_OFFSETOF:
2793                 return offsetof_to_firm(&expression->offsetofe);
2794         case EXPR_COMPOUND_LITERAL:
2795                 return compound_literal_to_firm(&expression->compound_literal);
2796
2797         case EXPR_UNKNOWN:
2798         case EXPR_INVALID:
2799                 break;
2800         }
2801         panic("invalid expression found");
2802 }
2803
2804 static ir_node *expression_to_firm(const expression_t *expression)
2805 {
2806         ir_node *res = _expression_to_firm(expression);
2807
2808         if(res != NULL && get_irn_mode(res) == mode_b) {
2809                 ir_mode *mode = get_ir_mode(expression->base.type);
2810                 if(is_Const(res)) {
2811                         if(is_Const_null(res)) {
2812                                 return new_Const_long(mode, 0);
2813                         } else {
2814                                 assert(is_Const_one(res));
2815                                 return new_Const_long(mode, 1);
2816                         }
2817                 }
2818
2819                 dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2820                 return produce_condition_result(expression, dbgi);
2821         }
2822
2823         return res;
2824 }
2825
2826 static ir_node *expression_to_modeb(const expression_t *expression)
2827 {
2828         ir_node *res = _expression_to_firm(expression);
2829         res          = create_conv(NULL, res, mode_b);
2830
2831         return res;
2832 }
2833
2834 /**
2835  * create a short-circuit expression evaluation that tries to construct
2836  * efficient control flow structures for &&, || and ! expressions
2837  */
2838 static void create_condition_evaluation(const expression_t *expression,
2839                                         ir_node *true_block,
2840                                         ir_node *false_block)
2841 {
2842         switch(expression->kind) {
2843         case EXPR_UNARY_NOT: {
2844                 const unary_expression_t *unary_expression = &expression->unary;
2845                 create_condition_evaluation(unary_expression->value, false_block,
2846                                             true_block);
2847                 return;
2848         }
2849         case EXPR_BINARY_LOGICAL_AND: {
2850                 const binary_expression_t *binary_expression = &expression->binary;
2851
2852                 ir_node *cur_block   = get_cur_block();
2853                 ir_node *extra_block = new_immBlock();
2854                 set_cur_block(cur_block);
2855                 create_condition_evaluation(binary_expression->left, extra_block,
2856                                             false_block);
2857                 mature_immBlock(extra_block);
2858                 set_cur_block(extra_block);
2859                 create_condition_evaluation(binary_expression->right, true_block,
2860                                             false_block);
2861                 return;
2862         }
2863         case EXPR_BINARY_LOGICAL_OR: {
2864                 const binary_expression_t *binary_expression = &expression->binary;
2865
2866                 ir_node *cur_block   = get_cur_block();
2867                 ir_node *extra_block = new_immBlock();
2868                 set_cur_block(cur_block);
2869                 create_condition_evaluation(binary_expression->left, true_block,
2870                                             extra_block);
2871                 mature_immBlock(extra_block);
2872                 set_cur_block(extra_block);
2873                 create_condition_evaluation(binary_expression->right, true_block,
2874                                             false_block);
2875                 return;
2876         }
2877         default:
2878                 break;
2879         }
2880
2881         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2882         ir_node  *condition  = expression_to_modeb(expression);
2883         ir_node  *cond       = new_d_Cond(dbgi, condition);
2884         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2885         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2886
2887         /* set branch prediction info based on __builtin_expect */
2888         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2889                 long               cnst = fold_constant(expression->binary.right);
2890                 cond_jmp_predicate pred;
2891
2892                 if(cnst == 0) {
2893                         pred = COND_JMP_PRED_FALSE;
2894                 } else {
2895                         pred = COND_JMP_PRED_TRUE;
2896                 }
2897                 set_Cond_jmp_pred(cond, pred);
2898         }
2899
2900         add_immBlock_pred(true_block, true_proj);
2901         add_immBlock_pred(false_block, false_proj);
2902
2903         set_cur_block(NULL);
2904 }
2905
2906
2907
2908 static void create_declaration_entity(declaration_t *declaration,
2909                                       declaration_kind_t declaration_kind,
2910                                       ir_type *parent_type)
2911 {
2912         ident     *const id     = new_id_from_str(declaration->symbol->string);
2913         type_t    *const type   = skip_typeref(declaration->type);
2914         ir_type   *const irtype = get_ir_type(type);
2915         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2916         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2917
2918         declaration->declaration_kind = (unsigned char) declaration_kind;
2919         declaration->v.entity         = entity;
2920         set_entity_variability(entity, variability_uninitialized);
2921         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
2922         if(parent_type == get_tls_type())
2923                 set_entity_allocation(entity, allocation_automatic);
2924         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2925                 set_entity_allocation(entity, allocation_static);
2926
2927         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
2928                 set_entity_volatility(entity, volatility_is_volatile);
2929         }
2930 }
2931
2932
2933 typedef struct type_path_entry_t type_path_entry_t;
2934 struct type_path_entry_t {
2935         type_t           *type;
2936         ir_initializer_t *initializer;
2937         size_t            index;
2938         declaration_t    *compound_entry;
2939 };
2940
2941 typedef struct type_path_t type_path_t;
2942 struct type_path_t {
2943         type_path_entry_t *path;
2944         type_t            *top_type;
2945         bool               invalid;
2946 };
2947
2948 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2949 {
2950         size_t len = ARR_LEN(path->path);
2951
2952         for(size_t i = 0; i < len; ++i) {
2953                 const type_path_entry_t *entry = & path->path[i];
2954
2955                 type_t *type = skip_typeref(entry->type);
2956                 if(is_type_compound(type)) {
2957                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2958                 } else if(is_type_array(type)) {
2959                         fprintf(stderr, "[%zd]", entry->index);
2960                 } else {
2961                         fprintf(stderr, "-INVALID-");
2962                 }
2963         }
2964         fprintf(stderr, "  (");
2965         print_type(path->top_type);
2966         fprintf(stderr, ")");
2967 }
2968
2969 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2970 {
2971         size_t len = ARR_LEN(path->path);
2972         assert(len > 0);
2973         return & path->path[len-1];
2974 }
2975
2976 static type_path_entry_t *append_to_type_path(type_path_t *path)
2977 {
2978         size_t len = ARR_LEN(path->path);
2979         ARR_RESIZE(type_path_entry_t, path->path, len+1);
2980
2981         type_path_entry_t *result = & path->path[len];
2982         memset(result, 0, sizeof(result[0]));
2983         return result;
2984 }
2985
2986 static size_t get_compound_size(const compound_type_t *type)
2987 {
2988         declaration_t *declaration = type->declaration;
2989         declaration_t *member      = declaration->scope.declarations;
2990         size_t         size        = 0;
2991         for( ; member != NULL; member = member->next) {
2992                 ++size;
2993         }
2994         /* TODO: cache results? */
2995
2996         return size;
2997 }
2998
2999 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3000 {
3001         type_t *orig_top_type = path->top_type;
3002         type_t *top_type      = skip_typeref(orig_top_type);
3003
3004         assert(is_type_compound(top_type) || is_type_array(top_type));
3005
3006         if(ARR_LEN(path->path) == 0) {
3007                 return NULL;
3008         } else {
3009                 type_path_entry_t *top         = get_type_path_top(path);
3010                 ir_initializer_t  *initializer = top->initializer;
3011                 return get_initializer_compound_value(initializer, top->index);
3012         }
3013 }
3014
3015 static void descend_into_subtype(type_path_t *path)
3016 {
3017         type_t *orig_top_type = path->top_type;
3018         type_t *top_type      = skip_typeref(orig_top_type);
3019
3020         assert(is_type_compound(top_type) || is_type_array(top_type));
3021
3022         ir_initializer_t *initializer = get_initializer_entry(path);
3023
3024         type_path_entry_t *top = append_to_type_path(path);
3025         top->type              = top_type;
3026
3027         size_t len;
3028
3029         if(is_type_compound(top_type)) {
3030                 declaration_t *declaration = top_type->compound.declaration;
3031                 declaration_t *entry       = declaration->scope.declarations;
3032
3033                 top->compound_entry = entry;
3034                 top->index          = 0;
3035                 len                 = get_compound_size(&top_type->compound);
3036                 if(entry != NULL)
3037                         path->top_type = entry->type;
3038         } else {
3039                 assert(is_type_array(top_type));
3040                 assert(top_type->array.size > 0);
3041
3042                 top->index     = 0;
3043                 path->top_type = top_type->array.element_type;
3044                 len            = top_type->array.size;
3045         }
3046         if(initializer == NULL
3047                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3048                 initializer = create_initializer_compound(len);
3049                 /* we have to set the entry at the 2nd latest path entry... */
3050                 size_t path_len = ARR_LEN(path->path);
3051                 assert(path_len >= 1);
3052                 if(path_len > 1) {
3053                         type_path_entry_t *entry        = & path->path[path_len-2];
3054                         ir_initializer_t  *tinitializer = entry->initializer;
3055                         set_initializer_compound_value(tinitializer, entry->index,
3056                                                        initializer);
3057                 }
3058         }
3059         top->initializer = initializer;
3060 }
3061
3062 static void ascend_from_subtype(type_path_t *path)
3063 {
3064         type_path_entry_t *top = get_type_path_top(path);
3065
3066         path->top_type = top->type;
3067
3068         size_t len = ARR_LEN(path->path);
3069         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3070 }
3071
3072 static void walk_designator(type_path_t *path, const designator_t *designator)
3073 {
3074         /* designators start at current object type */
3075         ARR_RESIZE(type_path_entry_t, path->path, 1);
3076
3077         for( ; designator != NULL; designator = designator->next) {
3078                 type_path_entry_t *top         = get_type_path_top(path);
3079                 type_t            *orig_type   = top->type;
3080                 type_t            *type        = skip_typeref(orig_type);
3081
3082                 if(designator->symbol != NULL) {
3083                         assert(is_type_compound(type));
3084                         size_t    index  = 0;
3085                         symbol_t *symbol = designator->symbol;
3086
3087                         declaration_t *declaration = type->compound.declaration;
3088                         declaration_t *iter        = declaration->scope.declarations;
3089                         for( ; iter != NULL; iter = iter->next, ++index) {
3090                                 if(iter->symbol == symbol) {
3091                                         break;
3092                                 }
3093                         }
3094                         assert(iter != NULL);
3095
3096                         top->type           = orig_type;
3097                         top->compound_entry = iter;
3098                         top->index          = index;
3099                         orig_type           = iter->type;
3100                 } else {
3101                         expression_t *array_index = designator->array_index;
3102                         assert(designator->array_index != NULL);
3103                         assert(is_type_array(type));
3104                         assert(is_type_valid(array_index->base.type));
3105
3106                         long index = fold_constant(array_index);
3107                         assert(index >= 0);
3108 #ifndef NDEBUG
3109                         if(type->array.size_constant == 1) {
3110                                 long array_size = type->array.size;
3111                                 assert(index < array_size);
3112                         }
3113 #endif
3114
3115                         top->type  = orig_type;
3116                         top->index = (size_t) index;
3117                         orig_type  = type->array.element_type;
3118                 }
3119                 path->top_type = orig_type;
3120
3121                 if(designator->next != NULL) {
3122                         descend_into_subtype(path);
3123                 }
3124         }
3125
3126         path->invalid  = false;
3127 }
3128
3129 static void advance_current_object(type_path_t *path)
3130 {
3131         if(path->invalid) {
3132                 /* TODO: handle this... */
3133                 panic("invalid initializer in ast2firm (excessive elements)");
3134                 return;
3135         }
3136
3137         type_path_entry_t *top = get_type_path_top(path);
3138
3139         type_t *type = skip_typeref(top->type);
3140         if(is_type_union(type)) {
3141                 top->compound_entry = NULL;
3142         } else if(is_type_struct(type)) {
3143                 declaration_t *entry = top->compound_entry;
3144
3145                 top->index++;
3146                 entry               = entry->next;
3147                 top->compound_entry = entry;
3148                 if(entry != NULL) {
3149                         path->top_type = entry->type;
3150                         return;
3151                 }
3152         } else {
3153                 assert(is_type_array(type));
3154
3155                 top->index++;
3156                 if(!type->array.size_constant || top->index < type->array.size) {
3157                         return;
3158                 }
3159         }
3160
3161         /* we're past the last member of the current sub-aggregate, try if we
3162          * can ascend in the type hierarchy and continue with another subobject */
3163         size_t len = ARR_LEN(path->path);
3164
3165         if(len > 1) {
3166                 ascend_from_subtype(path);
3167                 advance_current_object(path);
3168         } else {
3169                 path->invalid = true;
3170         }
3171 }
3172
3173
3174 static ir_initializer_t *create_ir_initializer(
3175                 const initializer_t *initializer, type_t *type);
3176
3177 static ir_initializer_t *create_ir_initializer_value(
3178                 const initializer_value_t *initializer)
3179 {
3180         if (is_type_compound(initializer->value->base.type)) {
3181                 panic("initializer creation for compounds not implemented yet");
3182         }
3183         ir_node *value = expression_to_firm(initializer->value);
3184         return create_initializer_const(value);
3185 }
3186
3187 static ir_initializer_t *create_ir_initializer_list(
3188                 const initializer_list_t *initializer, type_t *type)
3189 {
3190         type_path_t path;
3191         memset(&path, 0, sizeof(path));
3192         path.top_type = type;
3193         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3194
3195         descend_into_subtype(&path);
3196
3197         for(size_t i = 0; i < initializer->len; ++i) {
3198                 const initializer_t *sub_initializer = initializer->initializers[i];
3199
3200                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3201                         walk_designator(&path, sub_initializer->designator.designator);
3202                         continue;
3203                 }
3204
3205                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3206                         /* we might have to descend into types until we're at a scalar
3207                          * type */
3208                         while(true) {
3209                                 type_t *orig_top_type = path.top_type;
3210                                 type_t *top_type      = skip_typeref(orig_top_type);
3211
3212                                 if(is_type_scalar(top_type))
3213                                         break;
3214                                 descend_into_subtype(&path);
3215                         }
3216                 }
3217
3218                 ir_initializer_t *sub_irinitializer
3219                         = create_ir_initializer(sub_initializer, path.top_type);
3220
3221                 size_t path_len = ARR_LEN(path.path);
3222                 assert(path_len >= 1);
3223                 type_path_entry_t *entry        = & path.path[path_len-1];
3224                 ir_initializer_t  *tinitializer = entry->initializer;
3225                 set_initializer_compound_value(tinitializer, entry->index,
3226                                                sub_irinitializer);
3227
3228                 advance_current_object(&path);
3229         }
3230
3231         assert(ARR_LEN(path.path) >= 1);
3232         ir_initializer_t *result = path.path[0].initializer;
3233         DEL_ARR_F(path.path);
3234
3235         return result;
3236 }
3237
3238 static ir_initializer_t *create_ir_initializer_string(
3239                 const initializer_string_t *initializer, type_t *type)
3240 {
3241         type = skip_typeref(type);
3242
3243         size_t            string_len    = initializer->string.size;
3244         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3245         size_t            len           = type->array.size;
3246         ir_initializer_t *irinitializer = create_initializer_compound(len);
3247
3248         const char *string = initializer->string.begin;
3249         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3250
3251         for(size_t i = 0; i < len; ++i) {
3252                 char c = 0;
3253                 if(i < string_len)
3254                         c = string[i];
3255
3256                 tarval           *tv = new_tarval_from_long(c, mode);
3257                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3258
3259                 set_initializer_compound_value(irinitializer, i, char_initializer);
3260         }
3261
3262         return irinitializer;
3263 }
3264
3265 static ir_initializer_t *create_ir_initializer_wide_string(
3266                 const initializer_wide_string_t *initializer, type_t *type)
3267 {
3268         size_t            string_len    = initializer->string.size;
3269         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3270         size_t            len           = type->array.size;
3271         ir_initializer_t *irinitializer = create_initializer_compound(len);
3272
3273         const wchar_rep_t *string = initializer->string.begin;
3274         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3275
3276         for(size_t i = 0; i < len; ++i) {
3277                 wchar_rep_t c = 0;
3278                 if(i < string_len) {
3279                         c = string[i];
3280                 }
3281                 tarval *tv = new_tarval_from_long(c, mode);
3282                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3283
3284                 set_initializer_compound_value(irinitializer, i, char_initializer);
3285         }
3286
3287         return irinitializer;
3288 }
3289
3290 static ir_initializer_t *create_ir_initializer(
3291                 const initializer_t *initializer, type_t *type)
3292 {
3293         switch(initializer->kind) {
3294                 case INITIALIZER_STRING:
3295                         return create_ir_initializer_string(&initializer->string, type);
3296
3297                 case INITIALIZER_WIDE_STRING:
3298                         return create_ir_initializer_wide_string(&initializer->wide_string,
3299                                                                  type);
3300
3301                 case INITIALIZER_LIST:
3302                         return create_ir_initializer_list(&initializer->list, type);
3303
3304                 case INITIALIZER_VALUE:
3305                         return create_ir_initializer_value(&initializer->value);
3306
3307                 case INITIALIZER_DESIGNATOR:
3308                         panic("unexpected designator initializer found");
3309         }
3310         panic("unknown initializer");
3311 }
3312
3313 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3314                 ir_node *base_addr)
3315 {
3316         if (is_atomic_type(type)) {
3317                 ir_mode *mode = get_type_mode(type);
3318                 tarval  *zero = get_mode_null(mode);
3319                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3320
3321                 /* TODO: bitfields */
3322                 ir_node *mem    = get_store();
3323                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3324                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3325                 set_store(proj_m);
3326         } else {
3327                 assert(is_compound_type(type));
3328
3329                 int n_members;
3330                 if(is_Array_type(type)) {
3331                         assert(has_array_upper_bound(type, 0));
3332                         n_members = get_array_upper_bound_int(type, 0);
3333                 } else {
3334                         n_members = get_compound_n_members(type);
3335                 }
3336
3337                 for(int i = 0; i < n_members; ++i) {
3338                         ir_node *addr;
3339                         ir_type *irtype;
3340                         if(is_Array_type(type)) {
3341                                 ir_entity *entity   = get_array_element_entity(type);
3342                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3343                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3344                                 ir_node   *in[1]    = { cnst };
3345                                 irtype = get_array_element_type(type);
3346                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3347                         } else {
3348                                 ir_entity *member = get_compound_member(type, i);
3349
3350                                 irtype = get_entity_type(member);
3351                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3352                         }
3353
3354                         create_dynamic_null_initializer(irtype, dbgi, addr);
3355                 }
3356         }
3357 }
3358
3359 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3360                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3361 {
3362         switch(get_initializer_kind(initializer)) {
3363         case IR_INITIALIZER_NULL: {
3364                 create_dynamic_null_initializer(type, dbgi, base_addr);
3365                 return;
3366         }
3367         case IR_INITIALIZER_CONST: {
3368                 ir_node *node = get_initializer_const_value(initializer);
3369                 ir_mode *mode = get_irn_mode(node);
3370                 assert(get_type_mode(type) == mode);
3371
3372                 /* TODO: bitfields... */
3373                 ir_node *mem    = get_store();
3374                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3375                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3376                 set_store(proj_m);
3377                 return;
3378         }
3379         case IR_INITIALIZER_TARVAL: {
3380                 tarval  *tv   = get_initializer_tarval_value(initializer);
3381                 ir_mode *mode = get_tarval_mode(tv);
3382                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3383                 assert(get_type_mode(type) == mode);
3384
3385                 /* TODO: bitfields... */
3386                 ir_node *mem    = get_store();
3387                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3388                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3389                 set_store(proj_m);
3390                 return;
3391         }
3392         case IR_INITIALIZER_COMPOUND: {
3393                 assert(is_compound_type(type));
3394                 int n_members;
3395                 if(is_Array_type(type)) {
3396                         assert(has_array_upper_bound(type, 0));
3397                         n_members = get_array_upper_bound_int(type, 0);
3398                 } else {
3399                         n_members = get_compound_n_members(type);
3400                 }
3401
3402                 if(get_initializer_compound_n_entries(initializer)
3403                                 != (unsigned) n_members)
3404                         panic("initializer doesn't match compound type");
3405
3406                 for(int i = 0; i < n_members; ++i) {
3407                         ir_node *addr;
3408                         ir_type *irtype;
3409                         if(is_Array_type(type)) {
3410                                 ir_entity *entity   = get_array_element_entity(type);
3411                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3412                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3413                                 ir_node   *in[1]    = { cnst };
3414                                 irtype = get_array_element_type(type);
3415                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3416                         } else {
3417                                 ir_entity *member = get_compound_member(type, i);
3418
3419                                 irtype = get_entity_type(member);
3420                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3421                         }
3422
3423                         ir_initializer_t *sub_init
3424                                 = get_initializer_compound_value(initializer, i);
3425
3426                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3427                 }
3428                 return;
3429         }
3430         }
3431
3432         panic("invalid IR_INITIALIZER found");
3433 }
3434
3435 static void create_dynamic_initializer(ir_initializer_t *initializer,
3436                 dbg_info *dbgi, ir_entity *entity)
3437 {
3438         ir_node *frame     = get_local_frame(entity);
3439         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3440         ir_type *type      = get_entity_type(entity);
3441
3442         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3443 }
3444
3445 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3446                                      ir_entity *entity, type_t *type)
3447 {
3448         ir_node *memory = get_store();
3449         ir_node *nomem  = new_NoMem();
3450         ir_node *frame  = get_irg_frame(current_ir_graph);
3451         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3452
3453         if(initializer->kind == INITIALIZER_VALUE) {
3454                 initializer_value_t *initializer_value = &initializer->value;
3455
3456                 ir_node *value = expression_to_firm(initializer_value->value);
3457                 type = skip_typeref(type);
3458                 assign_value(dbgi, addr, type, value);
3459                 return;
3460         }
3461
3462         if(!is_constant_initializer(initializer)) {
3463                 ir_initializer_t *irinitializer
3464                         = create_ir_initializer(initializer, type);
3465
3466                 create_dynamic_initializer(irinitializer, dbgi, entity);
3467                 return;
3468         }
3469
3470         /* create the ir_initializer */
3471         ir_graph *const old_current_ir_graph = current_ir_graph;
3472         current_ir_graph = get_const_code_irg();
3473
3474         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3475
3476         assert(current_ir_graph == get_const_code_irg());
3477         current_ir_graph = old_current_ir_graph;
3478
3479         /* create a "template" entity which is copied to the entity on the stack */
3480         ident     *const id          = id_unique("initializer.%u");
3481         ir_type   *const irtype      = get_ir_type(type);
3482         ir_type   *const global_type = get_glob_type();
3483         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3484         set_entity_ld_ident(init_entity, id);
3485
3486         set_entity_variability(init_entity, variability_initialized);
3487         set_entity_visibility(init_entity, visibility_local);
3488         set_entity_allocation(init_entity, allocation_static);
3489
3490         set_entity_initializer(init_entity, irinitializer);
3491
3492         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3493         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3494
3495         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3496         set_store(copyb_mem);
3497 }
3498
3499 static void create_initializer_local_variable_entity(declaration_t *declaration)
3500 {
3501         initializer_t *initializer = declaration->init.initializer;
3502         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3503         ir_entity     *entity      = declaration->v.entity;
3504         type_t        *type        = declaration->type;
3505         create_local_initializer(initializer, dbgi, entity, type);
3506 }
3507
3508 static void create_declaration_initializer(declaration_t *declaration)
3509 {
3510         initializer_t *initializer = declaration->init.initializer;
3511         if(initializer == NULL)
3512                 return;
3513
3514         declaration_kind_t declaration_kind
3515                 = (declaration_kind_t) declaration->declaration_kind;
3516         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3517                 create_initializer_local_variable_entity(declaration);
3518                 return;
3519         }
3520
3521         if(initializer->kind == INITIALIZER_VALUE) {
3522                 initializer_value_t *initializer_value = &initializer->value;
3523
3524                 ir_node *value = expression_to_firm(initializer_value->value);
3525
3526                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3527                         set_value(declaration->v.value_number, value);
3528                 } else {
3529                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3530
3531                         ir_entity *entity = declaration->v.entity;
3532
3533                         set_entity_variability(entity, variability_initialized);
3534                         set_atomic_ent_value(entity, value);
3535                 }
3536         } else {
3537                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3538                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3539
3540                 ir_entity        *entity        = declaration->v.entity;
3541                 ir_initializer_t *irinitializer
3542                         = create_ir_initializer(initializer, declaration->type);
3543
3544                 set_entity_variability(entity, variability_initialized);
3545                 set_entity_initializer(entity, irinitializer);
3546         }
3547 }
3548
3549 static void create_variable_length_array(declaration_t *declaration)
3550 {
3551         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3552         type_t   *type      = declaration->type;
3553         ir_node  *mem       = get_store();
3554         ir_type  *el_type   = get_ir_type(type->array.element_type);
3555
3556         /* make sure size_node is calculated */
3557         get_type_size(type);
3558         ir_node  *elems = type->array.size_node;
3559         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3560
3561         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3562         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3563         set_store(proj_m);
3564
3565         /* initializers are not allowed for VLAs */
3566         assert(declaration->init.initializer == NULL);
3567
3568         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3569         declaration->v.vla_base       = addr;
3570
3571         /* TODO: record VLA somewhere so we create the free node when we leave
3572          * it's scope */
3573 }
3574
3575 /**
3576  * Creates a Firm local variable from a declaration.
3577  */
3578 static void create_local_variable(declaration_t *declaration)
3579 {
3580         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3581
3582         bool needs_entity = declaration->address_taken;
3583         type_t *type = skip_typeref(declaration->type);
3584
3585         /* is it a variable length array? */
3586         if(is_type_array(type) && !type->array.size_constant) {
3587                 create_variable_length_array(declaration);
3588                 return;
3589         } else if(is_type_array(type) || is_type_compound(type)) {
3590                 needs_entity = true;
3591         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3592                 needs_entity = true;
3593         }
3594
3595         if(needs_entity) {
3596                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3597                 create_declaration_entity(declaration,
3598                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3599                                           frame_type);
3600         } else {
3601                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3602                 declaration->v.value_number   = next_value_number_function;
3603                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3604                 ++next_value_number_function;
3605         }
3606
3607         create_declaration_initializer(declaration);
3608 }
3609
3610 static void create_local_static_variable(declaration_t *declaration)
3611 {
3612         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3613
3614         type_t    *const type        = skip_typeref(declaration->type);
3615         ir_type   *const global_type = get_glob_type();
3616         ident     *const id          = new_id_from_str(declaration->symbol->string);
3617         ir_type   *const irtype      = get_ir_type(type);
3618         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3619         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3620
3621         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3622                 set_entity_volatility(entity, volatility_is_volatile);
3623         }
3624
3625         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3626         declaration->v.entity         = entity;
3627         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3628         set_entity_variability(entity, variability_uninitialized);
3629         set_entity_visibility(entity, visibility_local);
3630         set_entity_allocation(entity, allocation_static);
3631
3632         ir_graph *const old_current_ir_graph = current_ir_graph;
3633         current_ir_graph = get_const_code_irg();
3634
3635         create_declaration_initializer(declaration);
3636
3637         assert(current_ir_graph == get_const_code_irg());
3638         current_ir_graph = old_current_ir_graph;
3639 }
3640
3641
3642
3643 static void return_statement_to_firm(return_statement_t *statement)
3644 {
3645         if(get_cur_block() == NULL)
3646                 return;
3647
3648         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3649         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3650
3651
3652         ir_node *in[1];
3653         int      in_len;
3654         if(get_method_n_ress(func_irtype) > 0) {
3655                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3656
3657                 if(statement->value != NULL) {
3658                         ir_node *node = expression_to_firm(statement->value);
3659                         node  = do_strict_conv(dbgi, node);
3660                         in[0] = node;
3661                 } else {
3662                         ir_mode *mode;
3663                         if(is_compound_type(res_type)) {
3664                                 mode = mode_P_data;
3665                         } else {
3666                                 mode = get_type_mode(res_type);
3667                         }
3668                         in[0] = new_Unknown(mode);
3669                 }
3670                 in_len = 1;
3671         } else {
3672                 /* build return_value for its side effects */
3673                 if(statement->value != NULL) {
3674                         expression_to_firm(statement->value);
3675                 }
3676                 in_len = 0;
3677         }
3678
3679         ir_node  *store = get_store();
3680         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3681
3682         ir_node *end_block = get_irg_end_block(current_ir_graph);
3683         add_immBlock_pred(end_block, ret);
3684
3685         set_cur_block(NULL);
3686 }
3687
3688 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3689 {
3690         if(get_cur_block() == NULL)
3691                 return NULL;
3692
3693         return expression_to_firm(statement->expression);
3694 }
3695
3696 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3697 {
3698         ir_node     *result    = NULL;
3699         statement_t *statement = compound->statements;
3700         for( ; statement != NULL; statement = statement->base.next) {
3701                 //context2firm(&statement->scope);
3702
3703                 if(statement->base.next == NULL
3704                                 && statement->kind == STATEMENT_EXPRESSION) {
3705                         result = expression_statement_to_firm(
3706                                         &statement->expression);
3707                         break;
3708                 }
3709                 statement_to_firm(statement);
3710         }
3711
3712         return result;
3713 }
3714
3715 static void create_global_variable(declaration_t *declaration)
3716 {
3717         ir_visibility  vis;
3718         ir_type       *var_type;
3719         switch ((storage_class_tag_t)declaration->storage_class) {
3720                 case STORAGE_CLASS_STATIC:
3721                         vis = visibility_local;
3722                         goto global_var;
3723
3724                 case STORAGE_CLASS_EXTERN:
3725                         vis = visibility_external_allocated;
3726                         goto global_var;
3727
3728                 case STORAGE_CLASS_NONE:
3729                         vis = visibility_external_visible;
3730                         goto global_var;
3731
3732                 case STORAGE_CLASS_THREAD:
3733                         vis = visibility_external_visible;
3734                         goto tls_var;
3735
3736                 case STORAGE_CLASS_THREAD_EXTERN:
3737                         vis = visibility_external_allocated;
3738                         goto tls_var;
3739
3740                 case STORAGE_CLASS_THREAD_STATIC:
3741                         vis = visibility_local;
3742                         goto tls_var;
3743
3744 tls_var:
3745                         var_type = get_tls_type();
3746                         goto create_var;
3747
3748 global_var:
3749                         var_type = get_glob_type();
3750                         goto create_var;
3751
3752 create_var:
3753                         create_declaration_entity(declaration,
3754                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3755                                                   var_type);
3756                         set_entity_visibility(declaration->v.entity, vis);
3757
3758                         return;
3759
3760                 case STORAGE_CLASS_TYPEDEF:
3761                 case STORAGE_CLASS_AUTO:
3762                 case STORAGE_CLASS_REGISTER:
3763                 case STORAGE_CLASS_ENUM_ENTRY:
3764                         break;
3765         }
3766         panic("Invalid storage class for global variable");
3767 }
3768
3769 static void create_local_declaration(declaration_t *declaration)
3770 {
3771         if(declaration->symbol == NULL)
3772                 return;
3773
3774         type_t *type = skip_typeref(declaration->type);
3775
3776         switch ((storage_class_tag_t) declaration->storage_class) {
3777         case STORAGE_CLASS_STATIC:
3778                 create_local_static_variable(declaration);
3779                 return;
3780         case STORAGE_CLASS_EXTERN:
3781                 create_global_variable(declaration);
3782                 create_declaration_initializer(declaration);
3783                 return;
3784         case STORAGE_CLASS_NONE:
3785         case STORAGE_CLASS_AUTO:
3786         case STORAGE_CLASS_REGISTER:
3787                 if(is_type_function(type)) {
3788                         if(declaration->init.statement != NULL) {
3789                                 panic("nested functions not supported yet");
3790                         } else {
3791                                 get_function_entity(declaration);
3792                         }
3793                 } else {
3794                         create_local_variable(declaration);
3795                 }
3796                 return;
3797         case STORAGE_CLASS_ENUM_ENTRY:
3798         case STORAGE_CLASS_TYPEDEF:
3799         case STORAGE_CLASS_THREAD:
3800         case STORAGE_CLASS_THREAD_EXTERN:
3801         case STORAGE_CLASS_THREAD_STATIC:
3802                 return;
3803         }
3804         panic("invalid storage class found");
3805 }
3806
3807 static void declaration_statement_to_firm(declaration_statement_t *statement)
3808 {
3809         declaration_t *declaration = statement->declarations_begin;
3810         declaration_t *end         = statement->declarations_end->next;
3811         for( ; declaration != end; declaration = declaration->next) {
3812                 if(declaration->namespc != NAMESPACE_NORMAL)
3813                         continue;
3814                 create_local_declaration(declaration);
3815         }
3816 }
3817
3818 static void if_statement_to_firm(if_statement_t *statement)
3819 {
3820         ir_node *cur_block = get_cur_block();
3821
3822         ir_node *fallthrough_block = new_immBlock();
3823
3824         /* the true (blocks) */
3825         ir_node *true_block;
3826         if (statement->true_statement != NULL) {
3827                 true_block = new_immBlock();
3828                 statement_to_firm(statement->true_statement);
3829                 if(get_cur_block() != NULL) {
3830                         ir_node *jmp = new_Jmp();
3831                         add_immBlock_pred(fallthrough_block, jmp);
3832                 }
3833         } else {
3834                 true_block = fallthrough_block;
3835         }
3836
3837         /* the false (blocks) */
3838         ir_node *false_block;
3839         if(statement->false_statement != NULL) {
3840                 false_block = new_immBlock();
3841
3842                 statement_to_firm(statement->false_statement);
3843                 if(get_cur_block() != NULL) {
3844                         ir_node *jmp = new_Jmp();
3845                         add_immBlock_pred(fallthrough_block, jmp);
3846                 }
3847         } else {
3848                 false_block = fallthrough_block;
3849         }
3850
3851         /* create the condition */
3852         if(cur_block != NULL) {
3853                 set_cur_block(cur_block);
3854                 create_condition_evaluation(statement->condition, true_block,
3855                                             false_block);
3856         }
3857
3858         mature_immBlock(true_block);
3859         if(false_block != fallthrough_block) {
3860                 mature_immBlock(false_block);
3861         }
3862         mature_immBlock(fallthrough_block);
3863
3864         set_cur_block(fallthrough_block);
3865 }
3866
3867 static void while_statement_to_firm(while_statement_t *statement)
3868 {
3869         ir_node *jmp = NULL;
3870         if(get_cur_block() != NULL) {
3871                 jmp = new_Jmp();
3872         }
3873
3874         /* create the header block */
3875         ir_node *header_block = new_immBlock();
3876         if(jmp != NULL) {
3877                 add_immBlock_pred(header_block, jmp);
3878         }
3879
3880         /* the false block */
3881         ir_node *false_block = new_immBlock();
3882
3883         /* the loop body */
3884         ir_node *body_block;
3885         if (statement->body != NULL) {
3886                 ir_node *old_continue_label = continue_label;
3887                 ir_node *old_break_label    = break_label;
3888                 continue_label              = header_block;
3889                 break_label                 = false_block;
3890
3891                 body_block = new_immBlock();
3892                 statement_to_firm(statement->body);
3893
3894                 assert(continue_label == header_block);
3895                 assert(break_label    == false_block);
3896                 continue_label = old_continue_label;
3897                 break_label    = old_break_label;
3898
3899                 if(get_cur_block() != NULL) {
3900                         jmp = new_Jmp();
3901                         add_immBlock_pred(header_block, jmp);
3902                 }
3903         } else {
3904                 body_block = header_block;
3905         }
3906
3907         /* create the condition */
3908         set_cur_block(header_block);
3909
3910         create_condition_evaluation(statement->condition, body_block, false_block);
3911         mature_immBlock(body_block);
3912         mature_immBlock(false_block);
3913         mature_immBlock(header_block);
3914
3915         set_cur_block(false_block);
3916 }
3917
3918 static void do_while_statement_to_firm(do_while_statement_t *statement)
3919 {
3920         ir_node *jmp = NULL;
3921         if(get_cur_block() != NULL) {
3922                 jmp = new_Jmp();
3923         }
3924
3925         /* create the header block */
3926         ir_node *header_block = new_immBlock();
3927
3928         /* the false block */
3929         ir_node *false_block = new_immBlock();
3930
3931         /* the loop body */
3932         ir_node *body_block = new_immBlock();
3933         if(jmp != NULL) {
3934                 add_immBlock_pred(body_block, jmp);
3935         }
3936
3937         if (statement->body != NULL) {
3938                 ir_node *old_continue_label = continue_label;
3939                 ir_node *old_break_label    = break_label;
3940                 continue_label              = header_block;
3941                 break_label                 = false_block;
3942
3943                 statement_to_firm(statement->body);
3944
3945                 assert(continue_label == header_block);
3946                 assert(break_label    == false_block);
3947                 continue_label = old_continue_label;
3948                 break_label    = old_break_label;
3949
3950                 if (get_cur_block() == NULL) {
3951                         mature_immBlock(header_block);
3952                         mature_immBlock(body_block);
3953                         mature_immBlock(false_block);
3954                         return;
3955                 }
3956         }
3957
3958         ir_node *body_jmp = new_Jmp();
3959         add_immBlock_pred(header_block, body_jmp);
3960         mature_immBlock(header_block);
3961
3962         /* create the condition */
3963         set_cur_block(header_block);
3964
3965         create_condition_evaluation(statement->condition, body_block, false_block);
3966         mature_immBlock(body_block);
3967         mature_immBlock(false_block);
3968         mature_immBlock(header_block);
3969
3970         set_cur_block(false_block);
3971 }
3972
3973 static void for_statement_to_firm(for_statement_t *statement)
3974 {
3975         ir_node *jmp = NULL;
3976         if (get_cur_block() != NULL) {
3977                 if(statement->initialisation != NULL) {
3978                         expression_to_firm(statement->initialisation);
3979                 }
3980
3981                 /* create declarations */
3982                 declaration_t *declaration = statement->scope.declarations;
3983                 for( ; declaration != NULL; declaration = declaration->next) {
3984                         create_local_declaration(declaration);
3985                 }
3986
3987                 jmp = new_Jmp();
3988         }
3989
3990
3991         /* create the step block */
3992         ir_node *const step_block = new_immBlock();
3993         if (statement->step != NULL) {
3994                 expression_to_firm(statement->step);
3995         }
3996         ir_node *const step_jmp = new_Jmp();
3997
3998         /* create the header block */
3999         ir_node *const header_block = new_immBlock();
4000         if (jmp != NULL) {
4001                 add_immBlock_pred(header_block, jmp);
4002         }
4003         add_immBlock_pred(header_block, step_jmp);
4004
4005         /* the false block */
4006         ir_node *const false_block = new_immBlock();
4007
4008         /* the loop body */
4009         ir_node * body_block;
4010         if (statement->body != NULL) {
4011                 ir_node *const old_continue_label = continue_label;
4012                 ir_node *const old_break_label    = break_label;
4013                 continue_label = step_block;
4014                 break_label    = false_block;
4015
4016                 body_block = new_immBlock();
4017                 statement_to_firm(statement->body);
4018
4019                 assert(continue_label == step_block);
4020                 assert(break_label    == false_block);
4021                 continue_label = old_continue_label;
4022                 break_label    = old_break_label;
4023
4024                 if (get_cur_block() != NULL) {
4025                         jmp = new_Jmp();
4026                         add_immBlock_pred(step_block, jmp);
4027                 }
4028         } else {
4029                 body_block = step_block;
4030         }
4031
4032         /* create the condition */
4033         set_cur_block(header_block);
4034         if (statement->condition != NULL) {
4035                 create_condition_evaluation(statement->condition, body_block,
4036                                             false_block);
4037         } else {
4038                 keep_alive(header_block);
4039                 jmp = new_Jmp();
4040                 add_immBlock_pred(body_block, jmp);
4041         }
4042
4043         mature_immBlock(body_block);
4044         mature_immBlock(false_block);
4045         mature_immBlock(step_block);
4046         mature_immBlock(header_block);
4047         mature_immBlock(false_block);
4048
4049         set_cur_block(false_block);
4050 }
4051
4052 static void create_jump_statement(const statement_t *statement,
4053                                   ir_node *target_block)
4054 {
4055         if(get_cur_block() == NULL)
4056                 return;
4057
4058         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4059         ir_node  *jump = new_d_Jmp(dbgi);
4060         add_immBlock_pred(target_block, jump);
4061
4062         set_cur_block(NULL);
4063 }
4064
4065 static void switch_statement_to_firm(const switch_statement_t *statement)
4066 {
4067         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4068
4069         ir_node *expression  = expression_to_firm(statement->expression);
4070         ir_node *cond        = new_d_Cond(dbgi, expression);
4071         ir_node *break_block = new_immBlock();
4072
4073         set_cur_block(NULL);
4074
4075         ir_node *const old_switch_cond       = current_switch_cond;
4076         ir_node *const old_break_label       = break_label;
4077         const bool     old_saw_default_label = saw_default_label;
4078         current_switch_cond                  = cond;
4079         break_label                          = break_block;
4080
4081         if (statement->body != NULL) {
4082                 statement_to_firm(statement->body);
4083         }
4084
4085         if(get_cur_block() != NULL) {
4086                 ir_node *jmp = new_Jmp();
4087                 add_immBlock_pred(break_block, jmp);
4088         }
4089
4090         if (!saw_default_label) {
4091                 set_cur_block(get_nodes_block(cond));
4092                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4093                                                         MAGIC_DEFAULT_PN_NUMBER);
4094                 add_immBlock_pred(break_block, proj);
4095         }
4096
4097         assert(current_switch_cond == cond);
4098         assert(break_label         == break_block);
4099         current_switch_cond = old_switch_cond;
4100         break_label         = old_break_label;
4101         saw_default_label   = old_saw_default_label;
4102
4103         mature_immBlock(break_block);
4104         set_cur_block(break_block);
4105 }
4106
4107 static void case_label_to_firm(const case_label_statement_t *statement)
4108 {
4109         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4110
4111         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4112
4113         /* let's create a node and hope firm constant folding creates a Const
4114          * node... */
4115         ir_node *proj;
4116         ir_node *old_block = get_nodes_block(current_switch_cond);
4117         ir_node *block     = new_immBlock();
4118
4119         set_cur_block(old_block);
4120         if(statement->expression != NULL) {
4121                 long start_pn = fold_constant(statement->expression);
4122                 long end_pn = start_pn;
4123                 if (statement->end_range != NULL) {
4124                         end_pn = fold_constant(statement->end_range);
4125                 }
4126                 assert(start_pn <= end_pn);
4127                 /* create jumps for all cases in the given range */
4128                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4129                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4130                                 /* oops someone detected our cheating... */
4131                                 panic("magic default pn used");
4132                         }
4133                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4134                         add_immBlock_pred(block, proj);
4135                 }
4136         } else {
4137                 saw_default_label = true;
4138                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4139                                          MAGIC_DEFAULT_PN_NUMBER);
4140
4141                 add_immBlock_pred(block, proj);
4142         }
4143
4144         if (fallthrough != NULL) {
4145                 add_immBlock_pred(block, fallthrough);
4146         }
4147         mature_immBlock(block);
4148         set_cur_block(block);
4149
4150         if(statement->statement != NULL) {
4151                 statement_to_firm(statement->statement);
4152         }
4153 }
4154
4155 static ir_node *get_label_block(declaration_t *label)
4156 {
4157         assert(label->namespc == NAMESPACE_LABEL);
4158
4159         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4160                 return label->v.block;
4161         }
4162         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4163
4164         ir_node *old_cur_block = get_cur_block();
4165         ir_node *block         = new_immBlock();
4166         set_cur_block(old_cur_block);
4167
4168         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4169         label->v.block          = block;
4170
4171         ARR_APP1(ir_node *, imature_blocks, block);
4172
4173         return block;
4174 }
4175
4176 static void label_to_firm(const label_statement_t *statement)
4177 {
4178         ir_node *block = get_label_block(statement->label);
4179
4180         if(get_cur_block() != NULL) {
4181                 ir_node *jmp = new_Jmp();
4182                 add_immBlock_pred(block, jmp);
4183         }
4184
4185         set_cur_block(block);
4186         keep_alive(block);
4187
4188         if(statement->statement != NULL) {
4189                 statement_to_firm(statement->statement);
4190         }
4191 }
4192
4193 static void goto_to_firm(const goto_statement_t *statement)
4194 {
4195         if(get_cur_block() == NULL)
4196                 return;
4197
4198         ir_node *block = get_label_block(statement->label);
4199         ir_node *jmp   = new_Jmp();
4200         add_immBlock_pred(block, jmp);
4201
4202         set_cur_block(NULL);
4203 }
4204
4205 typedef enum modifier_t {
4206         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4207         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4208         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4209         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4210 } modifier_t;
4211
4212 static void asm_statement_to_firm(const asm_statement_t *statement)
4213 {
4214         (void) statement;
4215         fprintf(stderr, "WARNING asm not implemented yet!\n");
4216 #if 0
4217         bool needs_memory = false;
4218
4219         size_t         n_clobbers = 0;
4220         asm_clobber_t *clobber    = statement->clobbers;
4221         for( ; clobber != NULL; clobber = clobber->next) {
4222                 if(strcmp(clobber->clobber, "memory") == 0) {
4223                         needs_memory = true;
4224                         continue;
4225                 }
4226
4227                 ident *id = new_id_from_str(clobber->clobber);
4228                 obstack_ptr_grow(&asm_obst, id);
4229                 ++n_clobbers;
4230         }
4231         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4232         ident **clobbers = NULL;
4233         if(n_clobbers > 0) {
4234                 clobbers = obstack_finish(&asm_obst);
4235         }
4236
4237         /* find and count input and output constraints */
4238         asm_constraint_t *constraint = statement->inputs;
4239         for( ; constraint != NULL; constraint = constraint->next) {
4240                 int  modifiers      = 0;
4241                 bool supports_memop = false;
4242                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4243                         /* TODO: improve error messages */
4244                         switch(*c) {
4245                         case '?':
4246                         case '!':
4247                                 panic("multiple alternative assembler constraints not "
4248                                       "supported");
4249                         case 'm':
4250                         case 'o':
4251                         case 'V':
4252                         case '<':
4253                         case '>':
4254                         case 'X':
4255                                 supports_memop = true;
4256                                 obstack_1grow(&asm_obst, *c);
4257                                 break;
4258                         case '=':
4259                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4260                                         panic("inconsistent register constraints");
4261                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4262                                 break;
4263                         case '+':
4264                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4265                                         panic("inconsistent register constraints");
4266                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4267                                 break;
4268                         case '&':
4269                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4270                                 panic("early clobber assembler constraint not supported yet");
4271                                 break;
4272                         case '%':
4273                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4274                                 panic("commutative assembler constraint not supported yet");
4275                                 break;
4276                         case '#':
4277                                 /* skip register preferences stuff... */
4278                                 while(*c != 0 && *c != ',')
4279                                         ++c;
4280                                 break;
4281                         case '*':
4282                                 /* skip register preferences stuff... */
4283                                 ++c;
4284                                 break;
4285                         default:
4286                                 obstack_1grow(&asm_obst, *c);
4287                                 break;
4288                         }
4289                 }
4290                 obstack_1grow(&asm_obst, '\0');
4291                 const char *constraint_string = obstack_finish(&asm_obst);
4292
4293                 needs_memory |= supports_memop;
4294                 if(supports_memop) {
4295
4296                 }
4297         }
4298 #endif
4299 }
4300
4301 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4302         statement_to_firm(statement->try_statement);
4303         warningf(&statement->base.source_position, "structured exception handling ignored");
4304 }
4305
4306 static void     leave_statement_to_firm(leave_statement_t *statement) {
4307         errorf(&statement->base.source_position, "__leave not supported yet");
4308 }
4309
4310 static void statement_to_firm(statement_t *statement)
4311 {
4312         switch(statement->kind) {
4313         case STATEMENT_INVALID:
4314                 panic("invalid statement found");
4315                 return;
4316         case STATEMENT_EMPTY:
4317                 /* nothing */
4318                 return;
4319         case STATEMENT_COMPOUND:
4320                 compound_statement_to_firm(&statement->compound);
4321                 return;
4322         case STATEMENT_RETURN:
4323                 return_statement_to_firm(&statement->returns);
4324                 return;
4325         case STATEMENT_EXPRESSION:
4326                 expression_statement_to_firm(&statement->expression);
4327                 return;
4328         case STATEMENT_IF:
4329                 if_statement_to_firm(&statement->ifs);
4330                 return;
4331         case STATEMENT_WHILE:
4332                 while_statement_to_firm(&statement->whiles);
4333                 return;
4334         case STATEMENT_DO_WHILE:
4335                 do_while_statement_to_firm(&statement->do_while);
4336                 return;
4337         case STATEMENT_DECLARATION:
4338                 declaration_statement_to_firm(&statement->declaration);
4339                 return;
4340         case STATEMENT_BREAK:
4341                 create_jump_statement(statement, break_label);
4342                 return;
4343         case STATEMENT_CONTINUE:
4344                 create_jump_statement(statement, continue_label);
4345                 return;
4346         case STATEMENT_SWITCH:
4347                 switch_statement_to_firm(&statement->switchs);
4348                 return;
4349         case STATEMENT_CASE_LABEL:
4350                 case_label_to_firm(&statement->case_label);
4351                 return;
4352         case STATEMENT_FOR:
4353                 for_statement_to_firm(&statement->fors);
4354                 return;
4355         case STATEMENT_LABEL:
4356                 label_to_firm(&statement->label);
4357                 return;
4358         case STATEMENT_GOTO:
4359                 goto_to_firm(&statement->gotos);
4360                 return;
4361         case STATEMENT_ASM:
4362                 asm_statement_to_firm(&statement->asms);
4363                 return;
4364         case STATEMENT_MS_TRY:
4365                 ms_try_statement_to_firm(&statement->ms_try);
4366                 return;
4367         case STATEMENT_LEAVE:
4368                 leave_statement_to_firm(&statement->leave);
4369                 return;
4370         }
4371         panic("Statement not implemented\n");
4372 }
4373
4374 static int count_decls_in_expression(const expression_t *expression);
4375
4376 static int count_local_declarations(const declaration_t *      decl,
4377                                     const declaration_t *const end)
4378 {
4379         int count = 0;
4380         for (; decl != end; decl = decl->next) {
4381                 if(decl->namespc != NAMESPACE_NORMAL)
4382                         continue;
4383                 const type_t *type = skip_typeref(decl->type);
4384                 if (!decl->address_taken && is_type_scalar(type))
4385                         ++count;
4386                 const initializer_t *initializer = decl->init.initializer;
4387                 /* FIXME: should walk initializer hierarchies... */
4388                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4389                         count += count_decls_in_expression(initializer->value.value);
4390                 }
4391         }
4392         return count;
4393 }
4394
4395 static int count_decls_in_expression(const expression_t *expression) {
4396         int count = 0;
4397
4398         if(expression == NULL)
4399                 return 0;
4400
4401         switch((expression_kind_t) expression->base.kind) {
4402         case EXPR_STATEMENT:
4403                 return count_decls_in_stmts(expression->statement.statement);
4404         EXPR_BINARY_CASES {
4405                 int count_left  = count_decls_in_expression(expression->binary.left);
4406                 int count_right = count_decls_in_expression(expression->binary.right);
4407                 return count_left + count_right;
4408         }
4409         EXPR_UNARY_CASES
4410                 return count_decls_in_expression(expression->unary.value);
4411         case EXPR_CALL: {
4412                 call_argument_t *argument = expression->call.arguments;
4413                 for( ; argument != NULL; argument = argument->next) {
4414                         count += count_decls_in_expression(argument->expression);
4415                 }
4416                 return count;
4417         }
4418
4419         case EXPR_UNKNOWN:
4420         case EXPR_INVALID:
4421                 panic("unexpected expression kind");
4422
4423         case EXPR_COMPOUND_LITERAL:
4424                 /* TODO... */
4425                 break;
4426
4427         case EXPR_CONDITIONAL:
4428                 count += count_decls_in_expression(expression->conditional.condition);
4429                 count += count_decls_in_expression(expression->conditional.true_expression);
4430                 count += count_decls_in_expression(expression->conditional.false_expression);
4431                 return count;
4432
4433         case EXPR_BUILTIN_PREFETCH:
4434                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4435                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4436                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4437                 return count;
4438
4439         case EXPR_BUILTIN_CONSTANT_P:
4440                 count += count_decls_in_expression(expression->builtin_constant.value);
4441                 return count;
4442
4443         case EXPR_SELECT:
4444                 count += count_decls_in_expression(expression->select.compound);
4445                 return count;
4446
4447         case EXPR_ARRAY_ACCESS:
4448                 count += count_decls_in_expression(expression->array_access.array_ref);
4449                 count += count_decls_in_expression(expression->array_access.index);
4450                 return count;
4451
4452         case EXPR_CLASSIFY_TYPE:
4453                 count += count_decls_in_expression(expression->classify_type.type_expression);
4454                 return count;
4455
4456         case EXPR_SIZEOF:
4457         case EXPR_ALIGNOF: {
4458                 expression_t *tp_expression = expression->typeprop.tp_expression;
4459                 if (tp_expression != NULL) {
4460                         count += count_decls_in_expression(tp_expression);
4461                 }
4462                 return count;
4463         }
4464
4465         case EXPR_OFFSETOF:
4466         case EXPR_REFERENCE:
4467         case EXPR_CONST:
4468         case EXPR_CHARACTER_CONSTANT:
4469         case EXPR_WIDE_CHARACTER_CONSTANT:
4470         case EXPR_STRING_LITERAL:
4471         case EXPR_WIDE_STRING_LITERAL:
4472         case EXPR_FUNCNAME:
4473         case EXPR_BUILTIN_SYMBOL:
4474         case EXPR_VA_START:
4475         case EXPR_VA_ARG:
4476                 break;
4477         }
4478
4479         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4480          * (or implement all the missing expressions here/implement a walker)
4481          */
4482
4483         return 0;
4484 }
4485
4486 static int count_decls_in_stmts(const statement_t *stmt)
4487 {
4488         int count = 0;
4489         for (; stmt != NULL; stmt = stmt->base.next) {
4490                 switch (stmt->kind) {
4491                         case STATEMENT_EMPTY:
4492                                 break;
4493
4494                         case STATEMENT_DECLARATION: {
4495                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4496                                 count += count_local_declarations(decl_stmt->declarations_begin,
4497                                                                   decl_stmt->declarations_end->next);
4498                                 break;
4499                         }
4500
4501                         case STATEMENT_COMPOUND: {
4502                                 const compound_statement_t *const comp =
4503                                         &stmt->compound;
4504                                 count += count_decls_in_stmts(comp->statements);
4505                                 break;
4506                         }
4507
4508                         case STATEMENT_IF: {
4509                                 const if_statement_t *const if_stmt = &stmt->ifs;
4510                                 count += count_decls_in_expression(if_stmt->condition);
4511                                 count += count_decls_in_stmts(if_stmt->true_statement);
4512                                 count += count_decls_in_stmts(if_stmt->false_statement);
4513                                 break;
4514                         }
4515
4516                         case STATEMENT_SWITCH: {
4517                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4518                                 count += count_decls_in_expression(switch_stmt->expression);
4519                                 count += count_decls_in_stmts(switch_stmt->body);
4520                                 break;
4521                         }
4522
4523                         case STATEMENT_LABEL: {
4524                                 const label_statement_t *const label_stmt = &stmt->label;
4525                                 if(label_stmt->statement != NULL) {
4526                                         count += count_decls_in_stmts(label_stmt->statement);
4527                                 }
4528                                 break;
4529                         }
4530
4531                         case STATEMENT_WHILE: {
4532                                 const while_statement_t *const while_stmt = &stmt->whiles;
4533                                 count += count_decls_in_expression(while_stmt->condition);
4534                                 count += count_decls_in_stmts(while_stmt->body);
4535                                 break;
4536                         }
4537
4538                         case STATEMENT_DO_WHILE: {
4539                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4540                                 count += count_decls_in_expression(do_while_stmt->condition);
4541                                 count += count_decls_in_stmts(do_while_stmt->body);
4542                                 break;
4543                         }
4544
4545                         case STATEMENT_FOR: {
4546                                 const for_statement_t *const for_stmt = &stmt->fors;
4547                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4548                                 count += count_decls_in_expression(for_stmt->initialisation);
4549                                 count += count_decls_in_expression(for_stmt->condition);
4550                                 count += count_decls_in_expression(for_stmt->step);
4551                                 count += count_decls_in_stmts(for_stmt->body);
4552                                 break;
4553                         }
4554
4555                         case STATEMENT_CASE_LABEL: {
4556                                 const case_label_statement_t *label = &stmt->case_label;
4557                                 count += count_decls_in_expression(label->expression);
4558                                 if(label->statement != NULL) {
4559                                         count += count_decls_in_stmts(label->statement);
4560                                 }
4561                                 break;
4562                         }
4563
4564                         case STATEMENT_ASM:
4565                         case STATEMENT_BREAK:
4566                         case STATEMENT_CONTINUE:
4567                                 break;
4568
4569                         case STATEMENT_EXPRESSION: {
4570                                 const expression_statement_t *expr_stmt = &stmt->expression;
4571                                 count += count_decls_in_expression(expr_stmt->expression);
4572                                 break;
4573                         }
4574
4575                         case STATEMENT_GOTO:
4576                         case STATEMENT_LEAVE:
4577                         case STATEMENT_INVALID:
4578                                 break;
4579
4580                         case STATEMENT_RETURN: {
4581                                 const return_statement_t *ret_stmt = &stmt->returns;
4582                                 count += count_decls_in_expression(ret_stmt->value);
4583                                 break;
4584                         }
4585
4586                         case STATEMENT_MS_TRY: {
4587                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4588                                 count += count_decls_in_stmts(try_stmt->try_statement);
4589                                 if(try_stmt->except_expression != NULL)
4590                                         count += count_decls_in_expression(try_stmt->except_expression);
4591                                 count += count_decls_in_stmts(try_stmt->final_statement);
4592                                 break;
4593                         }
4594                 }
4595         }
4596         return count;
4597 }
4598
4599 static int get_function_n_local_vars(declaration_t *declaration)
4600 {
4601         int count = 0;
4602
4603         /* count parameters */
4604         count += count_local_declarations(declaration->scope.declarations, NULL);
4605
4606         /* count local variables declared in body */
4607         count += count_decls_in_stmts(declaration->init.statement);
4608
4609         return count;
4610 }
4611
4612 static void initialize_function_parameters(declaration_t *declaration)
4613 {
4614         ir_graph        *irg             = current_ir_graph;
4615         ir_node         *args            = get_irg_args(irg);
4616         ir_node         *start_block     = get_irg_start_block(irg);
4617         ir_type         *function_irtype = get_ir_type(declaration->type);
4618
4619         int            n         = 0;
4620         declaration_t *parameter = declaration->scope.declarations;
4621         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4622                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4623                 type_t *type = skip_typeref(parameter->type);
4624
4625                 bool needs_entity = parameter->address_taken;
4626                 assert(!is_type_array(type));
4627                 if(is_type_compound(type)) {
4628                         needs_entity = true;
4629                 }
4630
4631                 if(needs_entity) {
4632                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4633                         ident     *id     = new_id_from_str(parameter->symbol->string);
4634                         set_entity_ident(entity, id);
4635
4636                         parameter->declaration_kind
4637                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4638                         parameter->v.entity = entity;
4639                         continue;
4640                 }
4641
4642                 ir_mode *mode = get_ir_mode(parameter->type);
4643                 long     pn   = n;
4644                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4645
4646                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4647                 parameter->v.value_number   = next_value_number_function;
4648                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4649                 ++next_value_number_function;
4650
4651                 set_value(parameter->v.value_number, proj);
4652         }
4653 }
4654
4655 /**
4656  * Handle additional decl modifiers for IR-graphs
4657  *
4658  * @param irg            the IR-graph
4659  * @param dec_modifiers  additional modifiers
4660  */
4661 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4662 {
4663         if (decl_modifiers & DM_NORETURN) {
4664                 /* TRUE if the declaration includes the Microsoft
4665                    __declspec(noreturn) specifier. */
4666                 set_irg_additional_property(irg, mtp_property_noreturn);
4667         }
4668         if (decl_modifiers & DM_NOTHROW) {
4669                 /* TRUE if the declaration includes the Microsoft
4670                    __declspec(nothrow) specifier. */
4671                 set_irg_additional_property(irg, mtp_property_nothrow);
4672         }
4673         if (decl_modifiers & DM_NAKED) {
4674                 /* TRUE if the declaration includes the Microsoft
4675                    __declspec(naked) specifier. */
4676                 set_irg_additional_property(irg, mtp_property_naked);
4677         }
4678         if (decl_modifiers & DM_FORCEINLINE) {
4679                 /* TRUE if the declaration includes the
4680                    Microsoft __forceinline specifier. */
4681                 set_irg_inline_property(irg, irg_inline_forced);
4682         }
4683         if (decl_modifiers & DM_NOINLINE) {
4684                 /* TRUE if the declaration includes the Microsoft
4685                    __declspec(noinline) specifier. */
4686                 set_irg_inline_property(irg, irg_inline_forbidden);
4687         }
4688 }
4689
4690 static void create_function(declaration_t *declaration)
4691 {
4692         ir_entity *function_entity = get_function_entity(declaration);
4693
4694         if(declaration->init.statement == NULL)
4695                 return;
4696
4697         current_function_decl = declaration;
4698         current_function_name = NULL;
4699         current_funcsig       = NULL;
4700
4701         assert(imature_blocks == NULL);
4702         imature_blocks = NEW_ARR_F(ir_node*, 0);
4703
4704         int       n_local_vars = get_function_n_local_vars(declaration);
4705         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4706
4707         set_irg_fp_model(irg, firm_opt.fp_model);
4708         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
4709         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
4710
4711         ir_node *first_block = get_cur_block();
4712
4713         /* set inline flags */
4714         if (declaration->is_inline)
4715                 set_irg_inline_property(irg, irg_inline_recomended);
4716         handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4717
4718         next_value_number_function = 0;
4719         initialize_function_parameters(declaration);
4720
4721         statement_to_firm(declaration->init.statement);
4722
4723         ir_node *end_block = get_irg_end_block(irg);
4724
4725         /* do we have a return statement yet? */
4726         if(get_cur_block() != NULL) {
4727                 type_t *type = skip_typeref(declaration->type);
4728                 assert(is_type_function(type));
4729                 const function_type_t *func_type   = &type->function;
4730                 const type_t          *return_type
4731                         = skip_typeref(func_type->return_type);
4732
4733                 ir_node *ret;
4734                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4735                         ret = new_Return(get_store(), 0, NULL);
4736                 } else {
4737                         ir_mode *mode;
4738                         if(is_type_scalar(return_type)) {
4739                                 mode = get_ir_mode(func_type->return_type);
4740                         } else {
4741                                 mode = mode_P_data;
4742                         }
4743
4744                         ir_node *in[1];
4745                         /* §5.1.2.2.3 main implicitly returns 0 */
4746                         if (strcmp(declaration->symbol->string, "main") == 0) {
4747                                 in[0] = new_Const(mode, get_mode_null(mode));
4748                         } else {
4749                                 in[0] = new_Unknown(mode);
4750                         }
4751                         ret = new_Return(get_store(), 1, in);
4752                 }
4753                 add_immBlock_pred(end_block, ret);
4754         }
4755
4756         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4757                 mature_immBlock(imature_blocks[i]);
4758         }
4759         DEL_ARR_F(imature_blocks);
4760         imature_blocks = NULL;
4761
4762         mature_immBlock(first_block);
4763         mature_immBlock(end_block);
4764
4765         irg_finalize_cons(irg);
4766
4767         /* finalize the frame type */
4768         ir_type *frame_type = get_irg_frame_type(irg);
4769         int      n          = get_compound_n_members(frame_type);
4770         int      align_all  = 4;
4771         int      offset     = 0;
4772         for(int i = 0; i < n; ++i) {
4773                 ir_entity *entity      = get_compound_member(frame_type, i);
4774                 ir_type   *entity_type = get_entity_type(entity);
4775
4776                 int align = get_type_alignment_bytes(entity_type);
4777                 if(align > align_all)
4778                         align_all = align;
4779                 int misalign = 0;
4780                 if(align > 0) {
4781                         misalign  = offset % align;
4782                         if(misalign > 0) {
4783                                 offset += align - misalign;
4784                         }
4785                 }
4786
4787                 set_entity_offset(entity, offset);
4788                 offset += get_type_size_bytes(entity_type);
4789         }
4790         set_type_size_bytes(frame_type, offset);
4791         set_type_alignment_bytes(frame_type, align_all);
4792
4793         irg_vrfy(irg);
4794 }
4795
4796 static void scope_to_firm(scope_t *scope)
4797 {
4798         /* first pass: create declarations */
4799         declaration_t *declaration = scope->declarations;
4800         for( ; declaration != NULL; declaration = declaration->next) {
4801                 if(declaration->namespc != NAMESPACE_NORMAL)
4802                         continue;
4803                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4804                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4805                         continue;
4806                 if(declaration->symbol == NULL)
4807                         continue;
4808
4809                 type_t *type = skip_typeref(declaration->type);
4810                 if(is_type_function(type)) {
4811                         get_function_entity(declaration);
4812                 } else {
4813                         create_global_variable(declaration);
4814                 }
4815         }
4816
4817         /* second pass: create code/initializers */
4818         declaration = scope->declarations;
4819         for( ; declaration != NULL; declaration = declaration->next) {
4820                 if(declaration->namespc != NAMESPACE_NORMAL)
4821                         continue;
4822                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4823                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4824                         continue;
4825                 if(declaration->symbol == NULL)
4826                         continue;
4827
4828                 type_t *type = declaration->type;
4829                 if(type->kind == TYPE_FUNCTION) {
4830                         create_function(declaration);
4831                 } else {
4832                         assert(declaration->declaration_kind
4833                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4834                         current_ir_graph = get_const_code_irg();
4835                         create_declaration_initializer(declaration);
4836                 }
4837         }
4838 }
4839
4840 void init_ast2firm(void)
4841 {
4842         obstack_init(&asm_obst);
4843         init_atomic_modes();
4844
4845         id_underscore = new_id_from_chars("_", 1);
4846         id_imp        = new_id_from_chars("__imp_", 6);
4847
4848         /* OS option must be set to the backend */
4849         const char *s = "ia32-gasmode=linux";
4850         switch (firm_opt.os_support) {
4851         case OS_SUPPORT_WIN32:
4852                 create_ld_ident = create_ld_ident_win32;
4853                 s = "ia32-gasmode=mingw";
4854                 break;
4855         case OS_SUPPORT_LINUX:
4856                 create_ld_ident = create_ld_ident_linux_elf;
4857                 s = "ia32-gasmode=linux"; break;
4858                 break;
4859         case OS_SUPPORT_MACHO:
4860                 create_ld_ident = create_ld_ident_macho;
4861                 s = "ia32-gasmode=macho"; break;
4862                 break;
4863         }
4864         firm_be_option(s);
4865
4866         /* create idents for all known runtime functions */
4867         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4868                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4869         }
4870 }
4871
4872 static void init_ir_types(void)
4873 {
4874         static int ir_types_initialized = 0;
4875         if(ir_types_initialized)
4876                 return;
4877         ir_types_initialized = 1;
4878
4879         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4880         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4881         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4882
4883         ir_type_int        = get_ir_type(type_int);
4884         ir_type_const_char = get_ir_type(type_const_char);
4885         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4886         ir_type_void       = get_ir_type(type_void);
4887 }
4888
4889 void exit_ast2firm(void)
4890 {
4891         obstack_free(&asm_obst, NULL);
4892 }
4893
4894 void translation_unit_to_firm(translation_unit_t *unit)
4895 {
4896         /* just to be sure */
4897         continue_label      = NULL;
4898         break_label         = NULL;
4899         current_switch_cond = NULL;
4900
4901         init_ir_types();
4902
4903         scope_to_firm(&unit->scope);
4904 }