nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  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 label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66 static symbol_t  *sym_C;
  67
  68 extern bool       have_const_functions;
  69
  70 static const entity_t     *current_function_entity;
  71 static ir_node            *current_function_name;
  72 static ir_node            *current_funcsig;
  73 static switch_statement_t *current_switch;
  74 static ir_graph           *current_function;
  75 static translation_unit_t *current_translation_unit;
  76
  77 static entitymap_t  entitymap;
  78
  79 static struct obstack asm_obst;
  80
  81 typedef enum declaration_kind_t {
  82         DECLARATION_KIND_UNKNOWN,
  83         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  84         DECLARATION_KIND_GLOBAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE,
  86         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  87         DECLARATION_KIND_FUNCTION,
  88         DECLARATION_KIND_COMPOUND_MEMBER,
  89         DECLARATION_KIND_INNER_FUNCTION
  90 } declaration_kind_t;
  91
  92 static ir_mode *get_ir_mode(type_t *type);
  93 static ir_type *get_ir_type_incomplete(type_t *type);
  94
  95 static void enqueue_inner_function(entity_t *entity)
  96 {
  97         ARR_APP1(entity_t*, inner_functions, entity);
  98 }
  99
 100 static entity_t *next_inner_function(void)
 101 {
 102         int len = ARR_LEN(inner_functions);
 103         if (len == 0)
 104                 return NULL;
 105
 106         entity_t *entity = inner_functions[len-1];
 107         ARR_SHRINKLEN(inner_functions, len-1);
 108
 109         return entity;
 110 }
 111
 112 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 113 {
 114         const variable_t *variable = get_irg_loc_description(irg, pos);
 115
 116         if (variable != NULL) {
 117                 warningf(&variable->base.base.source_position,
 118                          "variable '%#T' might be used uninitialized",
 119                          variable->base.type, variable->base.base.symbol);
 120         }
 121         return new_r_Unknown(irg, mode);
 122 }
 123
 124 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 125 {
 126         const source_position_t *pos = (const source_position_t*) dbg;
 127         if (pos == NULL)
 128                 return 0;
 129         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 130                                    pos->linenr);
 131 }
 132
 133 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 134 {
 135         const source_position_t *pos = (const source_position_t*) dbg;
 136         if (pos == NULL)
 137                 return NULL;
 138         if (line != NULL)
 139                 *line = pos->linenr;
 140         return pos->input_name;
 141 }
 142
 143 static dbg_info *get_dbg_info(const source_position_t *pos)
 144 {
 145         return (dbg_info*) pos;
 146 }
 147
 148 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 149
 150 static ir_mode *mode_int, *mode_uint;
 151
 152 static ir_node *_expression_to_firm(const expression_t *expression);
 153 static ir_node *expression_to_firm(const expression_t *expression);
 154 static void create_local_declaration(entity_t *entity);
 155
 156 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 157 {
 158         unsigned flags = get_atomic_type_flags(kind);
 159         unsigned size  = get_atomic_type_size(kind);
 160         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 161                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 162                 char            name[64];
 163                 ir_mode_sort    sort;
 164                 unsigned        bit_size     = size * 8;
 165                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 166                 ir_mode_arithmetic arithmetic;
 167
 168                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 169                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 170                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 171                                  bit_size);
 172                         sort         = irms_int_number;
 173                         arithmetic   = irma_twos_complement;
 174                 } else {
 175                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 176                         snprintf(name, sizeof(name), "F%u", bit_size);
 177                         sort         = irms_float_number;
 178                         arithmetic   = irma_ieee754;
 179                 }
 180                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 181                  * a too big amount */
 182                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 183                                    0);
 184         }
 185
 186         return NULL;
 187 }
 188
 189 /**
 190  * Initialises the atomic modes depending on the machine size.
 191  */
 192 static void init_atomic_modes(void)
 193 {
 194         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 195                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 196         }
 197         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 198         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 199
 200         /* there's no real void type in firm */
 201         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 202
 203         /* initialize pointer modes */
 204         char            name[64];
 205         ir_mode_sort    sort         = irms_reference;
 206         unsigned        bit_size     = machine_size;
 207         bool            is_signed    = 0;
 208         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 209         unsigned        modulo_shift
 210                 = bit_size < machine_size ? machine_size : bit_size;
 211
 212         snprintf(name, sizeof(name), "p%u", machine_size);
 213         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 214                                         modulo_shift);
 215
 216         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 217         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 218
 219         /* Hmm, pointers should be machine size */
 220         set_modeP_data(ptr_mode);
 221         set_modeP_code(ptr_mode);
 222 }
 223
 224 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 225 {
 226         assert(kind <= ATOMIC_TYPE_LAST);
 227         return atomic_modes[kind];
 228 }
 229
 230 static unsigned get_compound_type_size(compound_type_t *type)
 231 {
 232         ir_type *irtype = get_ir_type((type_t*) type);
 233         return get_type_size_bytes(irtype);
 234 }
 235
 236 static unsigned get_array_type_size(array_type_t *type)
 237 {
 238         assert(!type->is_vla);
 239         ir_type *irtype = get_ir_type((type_t*) type);
 240         return get_type_size_bytes(irtype);
 241 }
 242
 243 static unsigned get_type_size_const(type_t *type)
 244 {
 245         switch(type->kind) {
 246         case TYPE_ERROR:
 247                 panic("error type occurred");
 248         case TYPE_ATOMIC:
 249                 return get_atomic_type_size(type->atomic.akind);
 250         case TYPE_COMPLEX:
 251                 return 2 * get_atomic_type_size(type->complex.akind);
 252         case TYPE_IMAGINARY:
 253                 return get_atomic_type_size(type->imaginary.akind);
 254         case TYPE_ENUM:
 255                 return get_mode_size_bytes(mode_int);
 256         case TYPE_COMPOUND_UNION:
 257         case TYPE_COMPOUND_STRUCT:
 258                 return get_compound_type_size(&type->compound);
 259         case TYPE_FUNCTION:
 260                 /* just a pointer to the function */
 261                 return get_mode_size_bytes(mode_P_code);
 262         case TYPE_POINTER:
 263                 return get_mode_size_bytes(mode_P_data);
 264         case TYPE_ARRAY:
 265                 return get_array_type_size(&type->array);
 266         case TYPE_BUILTIN:
 267                 return get_type_size_const(type->builtin.real_type);
 268         case TYPE_BITFIELD:
 269                 panic("type size of bitfield request");
 270         case TYPE_TYPEDEF:
 271         case TYPE_TYPEOF:
 272         case TYPE_INVALID:
 273                 break;
 274         }
 275         panic("Trying to determine size of invalid type");
 276 }
 277
 278 static ir_node *get_type_size(type_t *type)
 279 {
 280         type = skip_typeref(type);
 281
 282         if (is_type_array(type) && type->array.is_vla) {
 283                 ir_node *size_node = type->array.size_node;
 284                 if (size_node == NULL) {
 285                         size_node = expression_to_firm(type->array.size_expression);
 286                         assert(!is_Const(size_node));
 287                         type->array.size_node = size_node;
 288                 }
 289
 290                 ir_node *elem_size = get_type_size(type->array.element_type);
 291                 ir_mode *mode      = get_irn_mode(size_node);
 292                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 293                 return real_size;
 294         }
 295
 296         ir_mode *mode = get_ir_mode(type_size_t);
 297         symconst_symbol sym;
 298         sym.type_p = get_ir_type(type);
 299         return new_SymConst(mode, sym, symconst_type_size);
 300 }
 301
 302 static unsigned count_parameters(const function_type_t *function_type)
 303 {
 304         unsigned count = 0;
 305
 306         function_parameter_t *parameter = function_type->parameters;
 307         for ( ; parameter != NULL; parameter = parameter->next) {
 308                 ++count;
 309         }
 310
 311         return count;
 312 }
 313
 314 /**
 315  * Creates a Firm type for an atomic type
 316  */
 317 static ir_type *create_atomic_type(const atomic_type_t *type)
 318 {
 319         atomic_type_kind_t  kind   = type->akind;
 320         ir_mode            *mode   = atomic_modes[kind];
 321         ident              *id     = get_mode_ident(mode);
 322         ir_type            *irtype = new_type_primitive(id, mode);
 323
 324         set_type_alignment_bytes(irtype, type->base.alignment);
 325
 326         return irtype;
 327 }
 328
 329 /**
 330  * Creates a Firm type for a complex type
 331  */
 332 static ir_type *create_complex_type(const complex_type_t *type)
 333 {
 334         atomic_type_kind_t  kind = type->akind;
 335         ir_mode            *mode = atomic_modes[kind];
 336         ident              *id   = get_mode_ident(mode);
 337
 338         (void) id;
 339
 340         /* FIXME: finish the array */
 341         return NULL;
 342 }
 343
 344 /**
 345  * Creates a Firm type for an imaginary type
 346  */
 347 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 348 {
 349         atomic_type_kind_t  kind      = type->akind;
 350         ir_mode            *mode      = atomic_modes[kind];
 351         ident              *id        = get_mode_ident(mode);
 352         ir_type            *irtype    = new_type_primitive(id, mode);
 353
 354         set_type_alignment_bytes(irtype, type->base.alignment);
 355
 356         return irtype;
 357 }
 358
 359 /**
 360  * return type of a parameter (and take transparent union gnu extension into
 361  * account)
 362  */
 363 static type_t *get_parameter_type(type_t *type)
 364 {
 365         type = skip_typeref(type);
 366         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 367                 compound_t *compound = type->compound.compound;
 368                 type                 = compound->members.entities->declaration.type;
 369         }
 370
 371         return type;
 372 }
 373
 374 static ir_type *create_method_type(const function_type_t *function_type)
 375 {
 376         type_t  *return_type  = skip_typeref(function_type->return_type);
 377
 378         ident   *id           = id_unique("functiontype.%u");
 379         int      n_parameters = count_parameters(function_type);
 380         int      n_results    = return_type == type_void ? 0 : 1;
 381         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 382
 383         if (return_type != type_void) {
 384                 ir_type *restype = get_ir_type(return_type);
 385                 set_method_res_type(irtype, 0, restype);
 386         }
 387
 388         function_parameter_t *parameter = function_type->parameters;
 389         int                   n         = 0;
 390         for ( ; parameter != NULL; parameter = parameter->next) {
 391                 type_t  *type     = get_parameter_type(parameter->type);
 392                 ir_type *p_irtype = get_ir_type(type);
 393                 set_method_param_type(irtype, n, p_irtype);
 394                 ++n;
 395         }
 396
 397         if (function_type->variadic || function_type->unspecified_parameters) {
 398                 set_method_variadicity(irtype, variadicity_variadic);
 399         }
 400
 401 #if 0
 402         /* TODO: revive this with linkage stuff */
 403         unsigned cc = get_method_calling_convention(irtype);
 404         switch (function_type->calling_convention) {
 405         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 406         case CC_CDECL:
 407 is_cdecl:
 408                 set_method_calling_convention(irtype, SET_CDECL(cc));
 409                 break;
 410
 411         case CC_STDCALL:
 412                 if (function_type->variadic || function_type->unspecified_parameters)
 413                         goto is_cdecl;
 414
 415                 /* only non-variadic function can use stdcall, else use cdecl */
 416                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 417                 break;
 418
 419         case CC_FASTCALL:
 420                 if (function_type->variadic || function_type->unspecified_parameters)
 421                         goto is_cdecl;
 422                 /* only non-variadic function can use fastcall, else use cdecl */
 423                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 424                 break;
 425
 426         case CC_THISCALL:
 427                 /* Hmm, leave default, not accepted by the parser yet. */
 428                 break;
 429         }
 430 #endif
 431
 432         return irtype;
 433 }
 434
 435 static ir_type *create_pointer_type(pointer_type_t *type)
 436 {
 437         type_t   *points_to    = type->points_to;
 438         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 439         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 440                                                   ir_points_to, mode_P_data);
 441
 442         return ir_type;
 443 }
 444
 445 static ir_type *create_array_type(array_type_t *type)
 446 {
 447         type_t  *element_type    = type->element_type;
 448         ir_type *ir_element_type = get_ir_type(element_type);
 449
 450         ident    *id      = id_unique("array.%u");
 451         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 452
 453         const int align = get_type_alignment_bytes(ir_element_type);
 454         set_type_alignment_bytes(ir_type, align);
 455
 456         if (type->size_constant) {
 457                 int n_elements = type->size;
 458
 459                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 460
 461                 size_t elemsize = get_type_size_bytes(ir_element_type);
 462                 if (elemsize % align > 0) {
 463                         elemsize += align - (elemsize % align);
 464                 }
 465                 set_type_size_bytes(ir_type, n_elements * elemsize);
 466         } else {
 467                 set_array_lower_bound_int(ir_type, 0, 0);
 468         }
 469         set_type_state(ir_type, layout_fixed);
 470
 471         return ir_type;
 472 }
 473
 474 /**
 475  * Return the signed integer type of size bits.
 476  *
 477  * @param size   the size
 478  */
 479 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 480                                                  unsigned size)
 481 {
 482         static ir_mode *s_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = s_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_I%u", size);
 494                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 495                                    size <= 32 ? 32 : size );
 496                 s_modes[size] = mode;
 497         }
 498
 499         char name[32];
 500         snprintf(name, sizeof(name), "I%u", size);
 501         ident *id = new_id_from_str(name);
 502         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 503         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 504         set_primitive_base_type(res, base_tp);
 505
 506         return res;
 507 }
 508
 509 /**
 510  * Return the unsigned integer type of size bits.
 511  *
 512  * @param size   the size
 513  */
 514 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 515                                                    unsigned size)
 516 {
 517         static ir_mode *u_modes[64 + 1] = {NULL, };
 518         ir_type *res;
 519         ir_mode *mode;
 520
 521         if (size <= 0 || size > 64)
 522                 return NULL;
 523
 524         mode = u_modes[size];
 525         if (mode == NULL) {
 526                 char name[32];
 527
 528                 snprintf(name, sizeof(name), "bf_U%u", size);
 529                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 530                                    size <= 32 ? 32 : size );
 531                 u_modes[size] = mode;
 532         }
 533
 534         char name[32];
 535
 536         snprintf(name, sizeof(name), "U%u", size);
 537         ident *id = new_id_from_str(name);
 538         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 539         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 540         set_primitive_base_type(res, base_tp);
 541
 542         return res;
 543 }
 544
 545 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 546 {
 547         type_t *base = skip_typeref(type->base_type);
 548         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 549         ir_type *irbase = get_ir_type(base);
 550
 551         unsigned size = type->bit_size;
 552
 553         assert(!is_type_float(base));
 554         if (is_type_signed(base)) {
 555                 return get_signed_int_type_for_bit_size(irbase, size);
 556         } else {
 557                 return get_unsigned_int_type_for_bit_size(irbase, size);
 558         }
 559 }
 560
 561 #define INVALID_TYPE ((ir_type_ptr)-1)
 562
 563 enum {
 564         COMPOUND_IS_STRUCT = false,
 565         COMPOUND_IS_UNION  = true
 566 };
 567
 568 /**
 569  * Construct firm type from ast struct type.
 570  *
 571  * As anonymous inner structs get flattened to a single firm type, we might get
 572  * irtype, outer_offset and out_align passed (they represent the position of
 573  * the anonymous inner struct inside the resulting firm struct)
 574  */
 575 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 576                                      size_t *outer_offset, size_t *outer_align,
 577                                      bool incomplete, bool is_union)
 578 {
 579         compound_t *compound = type->compound;
 580
 581         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 582                 return compound->irtype;
 583         }
 584
 585         size_t align_all  = 1;
 586         size_t offset     = 0;
 587         size_t bit_offset = 0;
 588         size_t size       = 0;
 589
 590         if (irtype == NULL) {
 591                 symbol_t *symbol = compound->base.symbol;
 592                 ident    *id;
 593                 if (symbol != NULL) {
 594                         id = new_id_from_str(symbol->string);
 595                 } else {
 596                         if (is_union) {
 597                                 id = id_unique("__anonymous_union.%u");
 598                         } else {
 599                                 id = id_unique("__anonymous_struct.%u");
 600                         }
 601                 }
 602                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 603
 604                 if (is_union) {
 605                         irtype = new_d_type_union(id, dbgi);
 606                 } else {
 607                         irtype = new_d_type_struct(id, dbgi);
 608                 }
 609
 610                 compound->irtype_complete = false;
 611                 compound->irtype          = irtype;
 612         } else {
 613                 offset    = *outer_offset;
 614                 align_all = *outer_align;
 615         }
 616
 617         if (incomplete)
 618                 return irtype;
 619
 620         compound->irtype_complete = true;
 621
 622         entity_t *entry = compound->members.entities;
 623         for ( ; entry != NULL; entry = entry->base.next) {
 624                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 625                         continue;
 626
 627                 size_t prev_offset = offset;
 628
 629                 symbol_t *symbol     = entry->base.symbol;
 630                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 631                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 632
 633                 ident    *ident;
 634                 if (symbol != NULL) {
 635                         ident = new_id_from_str(symbol->string);
 636                 } else {
 637                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 638                                 create_compound_type(&entry_type->compound, irtype, &offset,
 639                                                      &align_all, false, COMPOUND_IS_STRUCT);
 640                                 goto finished_member;
 641                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 642                                 create_compound_type(&entry_type->compound, irtype, &offset,
 643                                                      &align_all, false, COMPOUND_IS_UNION);
 644                                 goto finished_member;
 645                         } else {
 646                                 assert(entry_type->kind == TYPE_BITFIELD);
 647                         }
 648                         ident = id_unique("anon.%u");
 649                 }
 650
 651                 ir_type *base_irtype;
 652                 if (entry_type->kind == TYPE_BITFIELD) {
 653                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 654                 } else {
 655                         base_irtype = get_ir_type(entry_type);
 656                 }
 657
 658                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 659                 size_t misalign        = offset % entry_alignment;
 660
 661                 ir_type   *entry_irtype = get_ir_type(entry_type);
 662                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 663
 664                 size_t base;
 665                 size_t bits_remainder;
 666                 if (entry_type->kind == TYPE_BITFIELD) {
 667                         size_t size_bits      = entry_type->bitfield.bit_size;
 668                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 669
 670                         if (size_bits > rest_size_bits) {
 671                                 /* start a new bucket */
 672                                 offset     += entry_alignment - misalign;
 673                                 bit_offset  = 0;
 674
 675                                 base           = offset;
 676                                 bits_remainder = 0;
 677                         } else {
 678                                 /* put into current bucket */
 679                                 base           = offset - misalign;
 680                                 bits_remainder = misalign * 8 + bit_offset;
 681                         }
 682
 683                         offset     += size_bits / 8;
 684                         bit_offset  = bit_offset + (size_bits % 8);
 685                 } else {
 686                         size_t entry_size = get_type_size_bytes(base_irtype);
 687                         if (misalign > 0 || bit_offset > 0)
 688                                 offset += entry_alignment - misalign;
 689
 690                         base           = offset;
 691                         bits_remainder = 0;
 692                         offset        += entry_size;
 693                         bit_offset     = 0;
 694                 }
 695
 696                 if (entry_alignment > align_all) {
 697                         if (entry_alignment % align_all != 0) {
 698                                 panic("uneven alignments not supported yet");
 699                         }
 700                         align_all = entry_alignment;
 701                 }
 702
 703                 set_entity_offset(entity, base);
 704                 set_entity_offset_bits_remainder(entity,
 705                                                  (unsigned char) bits_remainder);
 706                 //add_struct_member(irtype, entity);
 707                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 708                 assert(entry->compound_member.entity == NULL);
 709                 entry->compound_member.entity = entity;
 710
 711 finished_member:
 712                 if (is_union) {
 713                         size_t entry_size = offset - prev_offset;
 714                         if (entry_size > size) {
 715                                 size = entry_size;
 716                         }
 717                         offset     = 0;
 718                         bit_offset = 0;
 719                 }
 720         }
 721
 722         if (!is_union) {
 723                 size = offset;
 724         }
 725
 726         size_t misalign = offset % align_all;
 727         if (misalign > 0 || bit_offset > 0) {
 728                 size += align_all - misalign;
 729         }
 730
 731         if (outer_offset != NULL) {
 732                 if (!is_union) {
 733                         *outer_offset = offset;
 734                 } else {
 735                         *outer_offset += size;
 736                 }
 737
 738                 if (align_all > *outer_align) {
 739                         if (align_all % *outer_align != 0) {
 740                                 panic("uneven alignments not supported yet");
 741                         }
 742                         *outer_align = align_all;
 743                 }
 744         } else {
 745                 set_type_alignment_bytes(irtype, align_all);
 746                 set_type_size_bytes(irtype, size);
 747                 set_type_state(irtype, layout_fixed);
 748         }
 749
 750         return irtype;
 751 }
 752
 753 static ir_type *create_enum_type(enum_type_t *const type)
 754 {
 755         type->base.firm_type = ir_type_int;
 756
 757         ir_mode *const mode    = mode_int;
 758         tarval  *const one     = get_mode_one(mode);
 759         tarval  *      tv_next = get_tarval_null(mode);
 760
 761         bool constant_folding_old = constant_folding;
 762         constant_folding = true;
 763
 764         enum_t   *enume = type->enume;
 765         entity_t *entry = enume->base.next;
 766         for (; entry != NULL; entry = entry->base.next) {
 767                 if (entry->kind != ENTITY_ENUM_VALUE)
 768                         break;
 769
 770                 expression_t *const init = entry->enum_value.value;
 771                 if (init != NULL) {
 772                         ir_node *const cnst = expression_to_firm(init);
 773                         if (!is_Const(cnst)) {
 774                                 panic("couldn't fold constant");
 775                         }
 776                         tv_next = get_Const_tarval(cnst);
 777                 }
 778                 entry->enum_value.tv = tv_next;
 779                 tv_next = tarval_add(tv_next, one);
 780         }
 781
 782         constant_folding = constant_folding_old;
 783
 784         return ir_type_int;
 785 }
 786
 787 static ir_type *get_ir_type_incomplete(type_t *type)
 788 {
 789         assert(type != NULL);
 790         type = skip_typeref(type);
 791
 792         if (type->base.firm_type != NULL) {
 793                 assert(type->base.firm_type != INVALID_TYPE);
 794                 return type->base.firm_type;
 795         }
 796
 797         switch (type->kind) {
 798         case TYPE_COMPOUND_STRUCT:
 799                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 800                                             true, COMPOUND_IS_STRUCT);
 801         case TYPE_COMPOUND_UNION:
 802                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 803                                             true, COMPOUND_IS_UNION);
 804         default:
 805                 return get_ir_type(type);
 806         }
 807 }
 808
 809 ir_type *get_ir_type(type_t *type)
 810 {
 811         assert(type != NULL);
 812
 813         type = skip_typeref(type);
 814
 815         if (type->base.firm_type != NULL) {
 816                 assert(type->base.firm_type != INVALID_TYPE);
 817                 return type->base.firm_type;
 818         }
 819
 820         ir_type *firm_type = NULL;
 821         switch (type->kind) {
 822         case TYPE_ERROR:
 823                 /* Happens while constant folding, when there was an error */
 824                 return create_atomic_type(&type_void->atomic);
 825
 826         case TYPE_ATOMIC:
 827                 firm_type = create_atomic_type(&type->atomic);
 828                 break;
 829         case TYPE_COMPLEX:
 830                 firm_type = create_complex_type(&type->complex);
 831                 break;
 832         case TYPE_IMAGINARY:
 833                 firm_type = create_imaginary_type(&type->imaginary);
 834                 break;
 835         case TYPE_FUNCTION:
 836                 firm_type = create_method_type(&type->function);
 837                 break;
 838         case TYPE_POINTER:
 839                 firm_type = create_pointer_type(&type->pointer);
 840                 break;
 841         case TYPE_ARRAY:
 842                 firm_type = create_array_type(&type->array);
 843                 break;
 844         case TYPE_COMPOUND_STRUCT:
 845                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 846                                                  false, COMPOUND_IS_STRUCT);
 847                 break;
 848         case TYPE_COMPOUND_UNION:
 849                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 850                                                  false, COMPOUND_IS_UNION);
 851                 break;
 852         case TYPE_ENUM:
 853                 firm_type = create_enum_type(&type->enumt);
 854                 break;
 855         case TYPE_BUILTIN:
 856                 firm_type = get_ir_type(type->builtin.real_type);
 857                 break;
 858         case TYPE_BITFIELD:
 859                 firm_type = create_bitfield_type(&type->bitfield);
 860                 break;
 861
 862         case TYPE_TYPEOF:
 863         case TYPE_TYPEDEF:
 864         case TYPE_INVALID:
 865                 break;
 866         }
 867         if (firm_type == NULL)
 868                 panic("unknown type found");
 869
 870         type->base.firm_type = firm_type;
 871         return firm_type;
 872 }
 873
 874 ir_mode *get_ir_mode(type_t *type)
 875 {
 876         ir_type *irtype = get_ir_type(type);
 877
 878         /* firm doesn't report a mode for arrays somehow... */
 879         if (is_Array_type(irtype)) {
 880                 return mode_P_data;
 881         }
 882
 883         ir_mode *mode = get_type_mode(irtype);
 884         assert(mode != NULL);
 885         return mode;
 886 }
 887
 888 /** Names of the runtime functions. */
 889 static const struct {
 890         int        id;           /**< the rts id */
 891         int        n_res;        /**< number of return values */
 892         const char *name;        /**< the name of the rts function */
 893         int        n_params;     /**< number of parameters */
 894         unsigned   flags;        /**< language flags */
 895 } rts_data[] = {
 896         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 897         { rts_abort,      0, "abort",        0, _C89 },
 898         { rts_alloca,     1, "alloca",       1, _ALL },
 899         { rts_abs,        1, "abs",          1, _C89 },
 900         { rts_labs,       1, "labs",         1, _C89 },
 901         { rts_llabs,      1, "llabs",        1, _C99 },
 902         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 903
 904         { rts_fabs,       1, "fabs",         1, _C89 },
 905         { rts_sqrt,       1, "sqrt",         1, _C89 },
 906         { rts_cbrt,       1, "cbrt",         1, _C99 },
 907         { rts_exp,        1, "exp",          1, _C89 },
 908         { rts_exp2,       1, "exp2",         1, _C89 },
 909         { rts_exp10,      1, "exp10",        1, _GNUC },
 910         { rts_log,        1, "log",          1, _C89 },
 911         { rts_log2,       1, "log2",         1, _C89 },
 912         { rts_log10,      1, "log10",        1, _C89 },
 913         { rts_pow,        1, "pow",          2, _C89 },
 914         { rts_sin,        1, "sin",          1, _C89 },
 915         { rts_cos,        1, "cos",          1, _C89 },
 916         { rts_tan,        1, "tan",          1, _C89 },
 917         { rts_asin,       1, "asin",         1, _C89 },
 918         { rts_acos,       1, "acos",         1, _C89 },
 919         { rts_atan,       1, "atan",         1, _C89 },
 920         { rts_sinh,       1, "sinh",         1, _C89 },
 921         { rts_cosh,       1, "cosh",         1, _C89 },
 922         { rts_tanh,       1, "tanh",         1, _C89 },
 923
 924         { rts_fabsf,      1, "fabsf",        1, _C99 },
 925         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 926         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 927         { rts_expf,       1, "expf",         1, _C99 },
 928         { rts_exp2f,      1, "exp2f",        1, _C99 },
 929         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 930         { rts_logf,       1, "logf",         1, _C99 },
 931         { rts_log2f,      1, "log2f",        1, _C99 },
 932         { rts_log10f,     1, "log10f",       1, _C99 },
 933         { rts_powf,       1, "powf",         2, _C99 },
 934         { rts_sinf,       1, "sinf",         1, _C99 },
 935         { rts_cosf,       1, "cosf",         1, _C99 },
 936         { rts_tanf,       1, "tanf",         1, _C99 },
 937         { rts_asinf,      1, "asinf",        1, _C99 },
 938         { rts_acosf,      1, "acosf",        1, _C99 },
 939         { rts_atanf,      1, "atanf",        1, _C99 },
 940         { rts_sinhf,      1, "sinhf",        1, _C99 },
 941         { rts_coshf,      1, "coshf",        1, _C99 },
 942         { rts_tanhf,      1, "tanhf",        1, _C99 },
 943
 944         { rts_fabsl,      1, "fabsl",        1, _C99 },
 945         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 946         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 947         { rts_expl,       1, "expl",         1, _C99 },
 948         { rts_exp2l,      1, "exp2l",        1, _C99 },
 949         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 950         { rts_logl,       1, "logl",         1, _C99 },
 951         { rts_log2l,      1, "log2l",        1, _C99 },
 952         { rts_log10l,     1, "log10l",       1, _C99 },
 953         { rts_powl,       1, "powl",         2, _C99 },
 954         { rts_sinl,       1, "sinl",         1, _C99 },
 955         { rts_cosl,       1, "cosl",         1, _C99 },
 956         { rts_tanl,       1, "tanl",         1, _C99 },
 957         { rts_asinl,      1, "asinl",        1, _C99 },
 958         { rts_acosl,      1, "acosl",        1, _C99 },
 959         { rts_atanl,      1, "atanl",        1, _C99 },
 960         { rts_sinhl,      1, "sinhl",        1, _C99 },
 961         { rts_coshl,      1, "coshl",        1, _C99 },
 962         { rts_tanhl,      1, "tanhl",        1, _C99 },
 963
 964         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 965         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 966         { rts_strcmp,     1, "strcmp",       2, _C89 },
 967         { rts_strncmp,    1, "strncmp",      3, _C89 }
 968 };
 969
 970 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 971
 972 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 973
 974 /**
 975  * Handle GNU attributes for entities
 976  *
 977  * @param ent   the entity
 978  * @param decl  the routine declaration
 979  */
 980 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 981 {
 982         assert(is_declaration(entity));
 983         decl_modifiers_t modifiers = entity->declaration.modifiers;
 984         if (modifiers & DM_PURE) {
 985                 /* TRUE if the declaration includes the GNU
 986                    __attribute__((pure)) specifier. */
 987                 set_entity_additional_property(irentity, mtp_property_pure);
 988         }
 989         if (modifiers & DM_CONST) {
 990                 set_entity_additional_property(irentity, mtp_property_const);
 991                 have_const_functions = true;
 992         }
 993         if (modifiers & DM_USED) {
 994                 /* TRUE if the declaration includes the GNU
 995                    __attribute__((used)) specifier. */
 996                 set_entity_stickyness(irentity, stickyness_sticky);
 997         }
 998 }
 999
1000 static bool is_main(entity_t *entity)
1001 {
1002         static symbol_t *sym_main = NULL;
1003         if (sym_main == NULL) {
1004                 sym_main = symbol_table_insert("main");
1005         }
1006
1007         if (entity->base.symbol != sym_main)
1008                 return false;
1009         /* must be in outermost scope */
1010         if (entity->base.parent_scope != &current_translation_unit->scope)
1011                 return false;
1012
1013         return true;
1014 }
1015
1016 /**
1017  * Creates an entity representing a function.
1018  *
1019  * @param declaration  the function declaration
1020  */
1021 static ir_entity *get_function_entity(entity_t *entity)
1022 {
1023         assert(entity->kind == ENTITY_FUNCTION);
1024         if (entity->function.entity != NULL) {
1025                 return entity->function.entity;
1026         }
1027
1028         if (is_main(entity)) {
1029                 /* force main to C linkage */
1030                 type_t *type = entity->declaration.type;
1031                 assert(is_type_function(type));
1032                 if (type->function.linkage != NULL && type->function.linkage != sym_C) {
1033                         errorf(&entity->base.source_position,
1034                                "main must have \"C\" linkage");
1035                 }
1036
1037                 if (type->function.linkage == NULL || type->function.linkage != sym_C) {
1038                         type_t *new_type           = duplicate_type(type);
1039                         new_type->function.linkage = sym_C;
1040
1041                         type = typehash_insert(new_type);
1042                         if (type != new_type) {
1043                                 obstack_free(type_obst, new_type);
1044                         }
1045                         entity->declaration.type = type;
1046                 }
1047         }
1048
1049         symbol_t *symbol = entity->base.symbol;
1050         ident    *id     = new_id_from_str(symbol->string);
1051
1052         ir_type   *global_type    = get_glob_type();
1053         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1054         bool const has_body       = entity->function.statement != NULL;
1055
1056         /* already an entity defined? */
1057         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1058         if (irentity != NULL) {
1059                 if (get_entity_visibility(irentity) == visibility_external_allocated
1060                                 && has_body) {
1061                         set_entity_visibility(irentity, visibility_external_visible);
1062                 }
1063                 goto entity_created;
1064         }
1065
1066         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1067         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1068         set_entity_ld_ident(irentity, create_ld_ident(entity));
1069
1070         handle_gnu_attributes_ent(irentity, entity);
1071
1072         /* static inline             => local
1073          * extern inline             => local
1074          * inline without definition => local
1075          * inline with definition    => external_visible */
1076         storage_class_tag_t const storage_class
1077                 = (storage_class_tag_t) entity->declaration.storage_class;
1078         bool                const is_inline     = entity->function.is_inline;
1079         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1080                 set_entity_visibility(irentity, visibility_external_visible);
1081         } else if (storage_class == STORAGE_CLASS_STATIC ||
1082                    (is_inline && has_body)) {
1083                 if (!has_body) {
1084                         /* this entity was declared, but is defined nowhere */
1085                         set_entity_peculiarity(irentity, peculiarity_description);
1086                 }
1087                 set_entity_visibility(irentity, visibility_local);
1088         } else if (has_body) {
1089                 set_entity_visibility(irentity, visibility_external_visible);
1090         } else {
1091                 set_entity_visibility(irentity, visibility_external_allocated);
1092         }
1093         set_entity_allocation(irentity, allocation_static);
1094
1095         /* We should check for file scope here, but as long as we compile C only
1096            this is not needed. */
1097         if (! firm_opt.freestanding) {
1098                 /* check for a known runtime function */
1099                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1100                         if (id != rts_idents[i])
1101                                 continue;
1102
1103                         /* ignore those rts functions not necessary needed for current mode */
1104                         if ((c_mode & rts_data[i].flags) == 0)
1105                                 continue;
1106                         assert(rts_entities[rts_data[i].id] == NULL);
1107                         rts_entities[rts_data[i].id] = irentity;
1108                 }
1109         }
1110
1111         entitymap_insert(&entitymap, symbol, irentity);
1112
1113 entity_created:
1114         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1115         entity->function.entity  = irentity;
1116
1117         return irentity;
1118 }
1119
1120 /**
1121  * Creates a Const node representing a constant.
1122  */
1123 static ir_node *const_to_firm(const const_expression_t *cnst)
1124 {
1125         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1126         ir_mode  *mode = get_ir_mode(cnst->base.type);
1127
1128         char    buf[128];
1129         tarval *tv;
1130         size_t  len;
1131         if (mode_is_float(mode)) {
1132                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1133         } else {
1134                 if (mode_is_signed(mode)) {
1135                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1136                 } else {
1137                         len = snprintf(buf, sizeof(buf), "%llu",
1138                                        (unsigned long long) cnst->v.int_value);
1139                 }
1140                 tv = new_tarval_from_str(buf, len, mode);
1141         }
1142
1143         return new_d_Const(dbgi, mode, tv);
1144 }
1145
1146 /**
1147  * Creates a Const node representing a character constant.
1148  */
1149 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1150 {
1151         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1152         ir_mode  *mode = get_ir_mode(cnst->base.type);
1153
1154         long long int v = 0;
1155         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1156                 if (char_is_signed) {
1157                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1158                 } else {
1159                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1160                 }
1161         }
1162         char    buf[128];
1163         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1164         tarval *tv = new_tarval_from_str(buf, len, mode);
1165
1166         return new_d_Const(dbgi, mode, tv);
1167 }
1168
1169 /**
1170  * Creates a Const node representing a wide character constant.
1171  */
1172 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1173 {
1174         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1175         ir_mode  *mode = get_ir_mode(cnst->base.type);
1176
1177         long long int v = cnst->v.wide_character.begin[0];
1178
1179         char    buf[128];
1180         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1181         tarval *tv = new_tarval_from_str(buf, len, mode);
1182
1183         return new_d_Const(dbgi, mode, tv);
1184 }
1185
1186 /**
1187  * Creates a SymConst for a given entity.
1188  *
1189  * @param dbgi    debug info
1190  * @param mode    the (reference) mode for the SymConst
1191  * @param entity  the entity
1192  */
1193 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1194                               ir_entity *entity)
1195 {
1196         assert(entity != NULL);
1197         union symconst_symbol sym;
1198         sym.entity_p = entity;
1199         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1200 }
1201
1202 /**
1203  * Creates a SymConst node representing a string constant.
1204  *
1205  * @param src_pos    the source position of the string constant
1206  * @param id_prefix  a prefix for the name of the generated string constant
1207  * @param value      the value of the string constant
1208  */
1209 static ir_node *string_to_firm(const source_position_t *const src_pos,
1210                                const char *const id_prefix,
1211                                const string_t *const value)
1212 {
1213         ir_type  *const global_type = get_glob_type();
1214         dbg_info *const dbgi        = get_dbg_info(src_pos);
1215         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1216                                                        ir_type_const_char, dbgi);
1217
1218         ident     *const id     = id_unique(id_prefix);
1219         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1220         set_entity_ld_ident(entity, id);
1221         set_entity_variability(entity, variability_constant);
1222         set_entity_allocation(entity, allocation_static);
1223
1224         ir_type *const elem_type = ir_type_const_char;
1225         ir_mode *const mode      = get_type_mode(elem_type);
1226
1227         const char* const string = value->begin;
1228         const size_t      slen   = value->size;
1229
1230         set_array_lower_bound_int(type, 0, 0);
1231         set_array_upper_bound_int(type, 0, slen);
1232         set_type_size_bytes(type, slen);
1233         set_type_state(type, layout_fixed);
1234
1235         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1236         for (size_t i = 0; i < slen; ++i) {
1237                 tvs[i] = new_tarval_from_long(string[i], mode);
1238         }
1239
1240         set_array_entity_values(entity, tvs, slen);
1241         free(tvs);
1242
1243         return create_symconst(dbgi, mode_P_data, entity);
1244 }
1245
1246 /**
1247  * Creates a SymConst node representing a string literal.
1248  *
1249  * @param literal   the string literal
1250  */
1251 static ir_node *string_literal_to_firm(
1252                 const string_literal_expression_t* literal)
1253 {
1254         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1255                               &literal->value);
1256 }
1257
1258 /**
1259  * Creates a SymConst node representing a wide string literal.
1260  *
1261  * @param literal   the wide string literal
1262  */
1263 static ir_node *wide_string_literal_to_firm(
1264         const wide_string_literal_expression_t* const literal)
1265 {
1266         ir_type *const global_type = get_glob_type();
1267         ir_type *const elem_type   = ir_type_wchar_t;
1268         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1269         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1270                                                     elem_type, dbgi);
1271
1272         ident     *const id     = id_unique("Lstr.%u");
1273         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1274         set_entity_ld_ident(entity, id);
1275         set_entity_variability(entity, variability_constant);
1276         set_entity_allocation(entity, allocation_static);
1277
1278         ir_mode *const mode      = get_type_mode(elem_type);
1279
1280         const wchar_rep_t *const string = literal->value.begin;
1281         const size_t             slen   = literal->value.size;
1282
1283         set_array_lower_bound_int(type, 0, 0);
1284         set_array_upper_bound_int(type, 0, slen);
1285         set_type_size_bytes(type, slen);
1286         set_type_state(type, layout_fixed);
1287
1288         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1289         for (size_t i = 0; i < slen; ++i) {
1290                 tvs[i] = new_tarval_from_long(string[i], mode);
1291         }
1292
1293         set_array_entity_values(entity, tvs, slen);
1294         free(tvs);
1295
1296         return create_symconst(dbgi, mode_P_data, entity);
1297 }
1298
1299 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1300                                       ir_node *const addr)
1301 {
1302         ir_type *irtype = get_ir_type(type);
1303         if (is_compound_type(irtype)
1304                         || is_Method_type(irtype)
1305                         || is_Array_type(irtype)) {
1306                 return addr;
1307         }
1308
1309         ir_mode *const mode     = get_type_mode(irtype);
1310         ir_node *const memory   = get_store();
1311         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1312         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1313         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1314
1315         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1316                 set_Load_volatility(load, volatility_is_volatile);
1317         }
1318
1319         set_store(load_mem);
1320         return load_res;
1321 }
1322
1323 /**
1324  * Creates a strict Conv if neccessary.
1325  */
1326 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1327 {
1328         ir_mode *mode = get_irn_mode(node);
1329
1330         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1331                 return node;
1332         if (!mode_is_float(mode))
1333                 return node;
1334
1335         /* check if there is already a Conv */
1336         if (is_Conv(node)) {
1337                 /* convert it into a strict Conv */
1338                 set_Conv_strict(node, 1);
1339                 return node;
1340         }
1341
1342         /* otherwise create a new one */
1343         return new_d_strictConv(dbgi, node, mode);
1344 }
1345
1346 static ir_node *get_global_var_address(dbg_info *const dbgi,
1347                                        const entity_t *const entity)
1348 {
1349         assert(entity->kind == ENTITY_VARIABLE);
1350         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1351
1352         ir_entity *const irentity = entity->variable.v.entity;
1353         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1354                 case STORAGE_CLASS_THREAD:
1355                 case STORAGE_CLASS_THREAD_EXTERN:
1356                 case STORAGE_CLASS_THREAD_STATIC: {
1357                         ir_node *const no_mem = new_NoMem();
1358                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1359                         return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1360                 }
1361
1362                 default:
1363                         return create_symconst(dbgi, mode_P_data, irentity);
1364         }
1365 }
1366
1367 /**
1368  * Returns the correct base address depending on whether it is a parameter or a
1369  * normal local variable.
1370  */
1371 static ir_node *get_local_frame(ir_entity *const ent)
1372 {
1373         ir_graph      *const irg   = current_ir_graph;
1374         const ir_type *const owner = get_entity_owner(ent);
1375         if (owner == get_irg_frame_type(irg)) {
1376                 return get_irg_frame(irg);
1377         } else {
1378                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1379                 return get_irg_value_param_base(irg);
1380         }
1381 }
1382
1383 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1384 {
1385         ir_mode *value_mode = get_irn_mode(value);
1386
1387         if (value_mode == dest_mode || is_Bad(value))
1388                 return value;
1389
1390         if (dest_mode == mode_b) {
1391                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1392                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1393                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1394                 return proj;
1395         }
1396
1397         return new_d_Conv(dbgi, value, dest_mode);
1398 }
1399
1400 /**
1401  * Keep all memory edges of the given block.
1402  */
1403 static void keep_all_memory(ir_node *block) {
1404         ir_node *old = get_cur_block();
1405
1406         set_cur_block(block);
1407         keep_alive(get_store());
1408         /* TODO: keep all memory edges from restricted pointers */
1409         set_cur_block(old);
1410 }
1411
1412 static ir_node *reference_expression_enum_value_to_firm(
1413                 const reference_expression_t *ref)
1414 {
1415         entity_t *entity = ref->entity;
1416         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1417         /* make sure the type is constructed */
1418         (void) get_ir_type(type);
1419
1420         ir_mode *const mode = get_ir_mode(type);
1421         return new_Const(mode, entity->enum_value.tv);
1422 }
1423
1424 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1425 {
1426         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1427         entity_t *entity = ref->entity;
1428         assert(is_declaration(entity));
1429         type_t   *type   = skip_typeref(entity->declaration.type);
1430
1431         /* make sure the type is constructed */
1432         (void) get_ir_type(type);
1433
1434         switch ((declaration_kind_t) entity->declaration.kind) {
1435         case DECLARATION_KIND_UNKNOWN:
1436                 break;
1437
1438         case DECLARATION_KIND_LOCAL_VARIABLE: {
1439                 ir_mode *const mode = get_ir_mode(type);
1440                 return get_value(entity->variable.v.value_number, mode);
1441         }
1442         case DECLARATION_KIND_FUNCTION: {
1443                 ir_mode *const mode = get_ir_mode(type);
1444                 return create_symconst(dbgi, mode, entity->function.entity);
1445         }
1446         case DECLARATION_KIND_INNER_FUNCTION: {
1447                 ir_mode *const mode = get_ir_mode(type);
1448                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1449                         /* inner function not using the closure */
1450                         return create_symconst(dbgi, mode, entity->function.entity);
1451                 } else {
1452                         /* TODO: need trampoline here */
1453                         panic("Trampoline code not implemented");
1454                         return create_symconst(dbgi, mode, entity->function.entity);
1455                 }
1456         }
1457         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1458                 ir_node *const addr = get_global_var_address(dbgi, entity);
1459                 return deref_address(dbgi, entity->declaration.type, addr);
1460         }
1461
1462         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1463                 ir_entity *irentity = entity->variable.v.entity;
1464                 ir_node   *frame    = get_local_frame(irentity);
1465                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1466                 return deref_address(dbgi, entity->declaration.type, sel);
1467         }
1468
1469         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1470                 return entity->variable.v.vla_base;
1471
1472         case DECLARATION_KIND_COMPOUND_MEMBER:
1473                 panic("not implemented reference type");
1474         }
1475
1476         panic("reference to declaration with unknown type found");
1477 }
1478
1479 static ir_node *reference_addr(const reference_expression_t *ref)
1480 {
1481         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1482         entity_t *entity = ref->entity;
1483         assert(is_declaration(entity));
1484
1485         switch((declaration_kind_t) entity->declaration.kind) {
1486         case DECLARATION_KIND_UNKNOWN:
1487                 break;
1488         case DECLARATION_KIND_LOCAL_VARIABLE:
1489                 /* you can store to a local variable (so we don't panic but return NULL
1490                  * as an indicator for no real address) */
1491                 return NULL;
1492         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1493                 ir_node *const addr = get_global_var_address(dbgi, entity);
1494                 return addr;
1495         }
1496         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1497                 ir_entity *irentity = entity->variable.v.entity;
1498                 ir_node   *frame    = get_local_frame(irentity);
1499                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1500
1501                 return sel;
1502         }
1503
1504         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1505                 return entity->variable.v.vla_base;
1506
1507         case DECLARATION_KIND_FUNCTION: {
1508                 type_t  *const type = skip_typeref(entity->declaration.type);
1509                 ir_mode *const mode = get_ir_mode(type);
1510                 return create_symconst(dbgi, mode, entity->function.entity);
1511         }
1512
1513         case DECLARATION_KIND_INNER_FUNCTION:
1514         case DECLARATION_KIND_COMPOUND_MEMBER:
1515                 panic("not implemented reference type");
1516         }
1517
1518         panic("reference to declaration with unknown type found");
1519 }
1520
1521 /**
1522  * Transform calls to builtin functions.
1523  */
1524 static ir_node *process_builtin_call(const call_expression_t *call)
1525 {
1526         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1527
1528         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1529         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1530
1531         type_t *type = skip_typeref(builtin->base.type);
1532         assert(is_type_pointer(type));
1533
1534         type_t   *function_type = skip_typeref(type->pointer.points_to);
1535         symbol_t *symbol        = builtin->symbol;
1536
1537         switch(symbol->ID) {
1538         case T___builtin_alloca: {
1539                 if (call->arguments == NULL || call->arguments->next != NULL) {
1540                         panic("invalid number of parameters on __builtin_alloca");
1541                 }
1542                 expression_t *argument = call->arguments->expression;
1543                 ir_node      *size     = expression_to_firm(argument);
1544
1545                 ir_node *store  = get_store();
1546                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1547                                               stack_alloc);
1548                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1549                 set_store(proj_m);
1550                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1551
1552                 return res;
1553         }
1554
1555         case T___builtin_huge_val:
1556         case T___builtin_inf:
1557         case T___builtin_inff:
1558         case T___builtin_infl: {
1559                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1560                 tarval  *tv   = get_mode_infinite(mode);
1561                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1562                 return   res;
1563         }
1564         case T___builtin_nan:
1565         case T___builtin_nanf:
1566         case T___builtin_nanl: {
1567                 /* Ignore string for now... */
1568                 assert(is_type_function(function_type));
1569                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1570                 tarval  *tv   = get_mode_NAN(mode);
1571                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1572                 return res;
1573         }
1574         case T___builtin_va_end:
1575                 return NULL;
1576         default:
1577                 panic("Unsupported builtin found\n");
1578         }
1579 }
1580
1581 /**
1582  * Transform a call expression.
1583  * Handles some special cases, like alloca() calls, which must be resolved
1584  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1585  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1586  * handled right...
1587  */
1588 static ir_node *call_expression_to_firm(const call_expression_t *call)
1589 {
1590         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1591         assert(get_cur_block() != NULL);
1592
1593         expression_t *function = call->function;
1594         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1595                 return process_builtin_call(call);
1596         }
1597         if (function->kind == EXPR_REFERENCE) {
1598                 const reference_expression_t *ref    = &function->reference;
1599                 entity_t                     *entity = ref->entity;
1600
1601                 if (entity->kind == ENTITY_FUNCTION
1602                                 && entity->function.entity == rts_entities[rts_alloca]) {
1603                         /* handle alloca() call */
1604                         expression_t *argument = call->arguments->expression;
1605                         ir_node      *size     = expression_to_firm(argument);
1606
1607                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1608
1609                         ir_node  *store  = get_store();
1610                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1611                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1612                                                        stack_alloc);
1613                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1614                         set_store(proj_m);
1615                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1616
1617                         return res;
1618                 }
1619         }
1620         ir_node *callee = expression_to_firm(function);
1621
1622         type_t *type = skip_typeref(function->base.type);
1623         assert(is_type_pointer(type));
1624         pointer_type_t *pointer_type = &type->pointer;
1625         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1626         assert(is_type_function(points_to));
1627         function_type_t *function_type = &points_to->function;
1628
1629         int      n_parameters = 0;
1630         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1631         ir_type *new_method_type = NULL;
1632         if (function_type->variadic || function_type->unspecified_parameters) {
1633                 const call_argument_t *argument = call->arguments;
1634                 for ( ; argument != NULL; argument = argument->next) {
1635                         ++n_parameters;
1636                 }
1637
1638                 /* we need to construct a new method type matching the call
1639                  * arguments... */
1640                 int n_res       = get_method_n_ress(ir_method_type);
1641                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1642                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1643                                                     n_parameters, n_res, dbgi);
1644                 set_method_calling_convention(new_method_type,
1645                                get_method_calling_convention(ir_method_type));
1646                 set_method_additional_properties(new_method_type,
1647                                get_method_additional_properties(ir_method_type));
1648                 set_method_variadicity(new_method_type,
1649                                        get_method_variadicity(ir_method_type));
1650
1651                 for (int i = 0; i < n_res; ++i) {
1652                         set_method_res_type(new_method_type, i,
1653                                             get_method_res_type(ir_method_type, i));
1654                 }
1655                 argument = call->arguments;
1656                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1657                         expression_t *expression = argument->expression;
1658                         ir_type      *irtype     = get_ir_type(expression->base.type);
1659                         set_method_param_type(new_method_type, i, irtype);
1660                 }
1661                 ir_method_type = new_method_type;
1662         } else {
1663                 n_parameters = get_method_n_params(ir_method_type);
1664         }
1665
1666         ir_node *in[n_parameters];
1667
1668         const call_argument_t *argument = call->arguments;
1669         for (int n = 0; n < n_parameters; ++n) {
1670                 expression_t *expression = argument->expression;
1671                 ir_node      *arg_node   = expression_to_firm(expression);
1672
1673                 arg_node = do_strict_conv(dbgi, arg_node);
1674
1675                 in[n] = arg_node;
1676
1677                 argument = argument->next;
1678         }
1679
1680         ir_node  *store = get_store();
1681         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1682                                      ir_method_type);
1683         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1684         set_store(mem);
1685
1686         type_t  *return_type = skip_typeref(function_type->return_type);
1687         ir_node *result      = NULL;
1688
1689         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1690                 ir_mode *mode;
1691                 if (is_type_scalar(return_type)) {
1692                         mode = get_ir_mode(return_type);
1693                 } else {
1694                         mode = mode_P_data;
1695                 }
1696                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1697                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1698         }
1699
1700         if (function->kind == EXPR_REFERENCE &&
1701             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1702                 /* A dead end:  Keep the Call and the Block.  Also place all further
1703                  * nodes into a new and unreachable block. */
1704                 keep_alive(node);
1705                 keep_alive(get_cur_block());
1706                 new_Block(0, NULL);
1707         }
1708
1709         return result;
1710 }
1711
1712 static void statement_to_firm(statement_t *statement);
1713 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1714
1715 static ir_node *expression_to_addr(const expression_t *expression);
1716 static ir_node *create_condition_evaluation(const expression_t *expression,
1717                                             ir_node *true_block,
1718                                             ir_node *false_block);
1719
1720 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1721                          ir_node *value)
1722 {
1723         value = do_strict_conv(dbgi, value);
1724
1725         ir_node *memory = get_store();
1726
1727         if (is_type_scalar(type)) {
1728                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1729                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1730                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1731                         set_Store_volatility(store, volatility_is_volatile);
1732                 set_store(store_mem);
1733         } else {
1734                 ir_type *irtype    = get_ir_type(type);
1735                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1736                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1737                 set_store(copyb_mem);
1738         }
1739 }
1740
1741 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1742 {
1743         tarval *all_one   = get_mode_all_one(mode);
1744         int     mode_size = get_mode_size_bits(mode);
1745
1746         assert(offset >= 0);
1747         assert(size   >= 0);
1748         assert(offset + size <= mode_size);
1749         if (size == mode_size) {
1750                 return all_one;
1751         }
1752
1753         long    shiftr    = get_mode_size_bits(mode) - size;
1754         long    shiftl    = offset;
1755         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1756         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1757         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1758         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1759
1760         return mask1;
1761 }
1762
1763 static void bitfield_store_to_firm(dbg_info *dbgi,
1764                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1765 {
1766         ir_type *entity_type = get_entity_type(entity);
1767         ir_type *base_type   = get_primitive_base_type(entity_type);
1768         assert(base_type != NULL);
1769         ir_mode *mode        = get_type_mode(base_type);
1770
1771         value = create_conv(dbgi, value, mode);
1772
1773         /* kill upper bits of value and shift to right position */
1774         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1775         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1776
1777         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1778         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1779         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1780         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1781         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1782         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1783
1784         /* load current value */
1785         ir_node  *mem             = get_store();
1786         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1787         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1788         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1789         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1790         tarval   *inv_mask        = tarval_not(shift_mask);
1791         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1792         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1793
1794         /* construct new value and store */
1795         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1796         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1797         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1798         set_store(store_mem);
1799
1800         if (set_volatile) {
1801                 set_Load_volatility(load, volatility_is_volatile);
1802                 set_Store_volatility(store, volatility_is_volatile);
1803         }
1804 }
1805
1806 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1807                 ir_node *addr)
1808 {
1809         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1810         type_t   *type     = expression->base.type;
1811         ir_mode  *mode     = get_ir_mode(type);
1812         ir_node  *mem      = get_store();
1813         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1814         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1815         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1816
1817         load_res           = create_conv(dbgi, load_res, mode_int);
1818
1819         set_store(load_mem);
1820
1821         /* kill upper bits */
1822         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1823         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1824         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1825         ir_type   *entity_type  = get_entity_type(entity);
1826         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1827         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1828         assert(shift_bitsl >= 0);
1829         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1830         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1831         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1832
1833         long       shift_bitsr  = bitoffset + shift_bitsl;
1834         assert(shift_bitsr <= (long) machine_size);
1835         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1836         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1837         ir_node   *shiftr;
1838         if (mode_is_signed(mode)) {
1839                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1840         } else {
1841                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1842         }
1843
1844         return create_conv(dbgi, shiftr, mode);
1845 }
1846
1847 /* make sure the selected compound type is constructed */
1848 static void construct_select_compound(const select_expression_t *expression)
1849 {
1850         type_t *type = skip_typeref(expression->compound->base.type);
1851         if (is_type_pointer(type)) {
1852                 type = type->pointer.points_to;
1853         }
1854         (void) get_ir_type(type);
1855 }
1856
1857 static void set_value_for_expression_addr(const expression_t *expression,
1858                                           ir_node *value, ir_node *addr)
1859 {
1860         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1861         value          = do_strict_conv(dbgi, value);
1862
1863         if (expression->kind == EXPR_REFERENCE) {
1864                 const reference_expression_t *ref = &expression->reference;
1865
1866                 entity_t *entity = ref->entity;
1867                 assert(is_declaration(entity));
1868                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1869                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1870                         set_value(entity->variable.v.value_number, value);
1871                         return;
1872                 }
1873         }
1874
1875         if (addr == NULL)
1876                 addr = expression_to_addr(expression);
1877
1878         type_t *type = skip_typeref(expression->base.type);
1879
1880         if (expression->kind == EXPR_SELECT) {
1881                 const select_expression_t *select = &expression->select;
1882
1883                 construct_select_compound(select);
1884
1885                 entity_t *entity = select->compound_entry;
1886                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1887                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1888                         ir_entity *irentity = entity->compound_member.entity;
1889                         bool       set_volatile
1890                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1891                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1892                         return;
1893                 }
1894         }
1895
1896         assign_value(dbgi, addr, type, value);
1897 }
1898
1899 static void set_value_for_expression(const expression_t *expression,
1900                                      ir_node *value)
1901 {
1902         set_value_for_expression_addr(expression, value, NULL);
1903 }
1904
1905 static ir_node *get_value_from_lvalue(const expression_t *expression,
1906                                       ir_node *addr)
1907 {
1908         if (expression->kind == EXPR_REFERENCE) {
1909                 const reference_expression_t *ref = &expression->reference;
1910
1911                 entity_t *entity = ref->entity;
1912                 assert(entity->kind == ENTITY_VARIABLE);
1913                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1914                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1915                         assert(addr == NULL);
1916                         ir_mode *mode = get_ir_mode(expression->base.type);
1917                         return get_value(entity->variable.v.value_number, mode);
1918                 }
1919         }
1920
1921         assert(addr != NULL);
1922         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1923
1924         ir_node *value;
1925         if (expression->kind == EXPR_SELECT &&
1926             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1927             construct_select_compound(&expression->select);
1928                 value = bitfield_extract_to_firm(&expression->select, addr);
1929         } else {
1930                 value = deref_address(dbgi, expression->base.type, addr);
1931         }
1932
1933         return value;
1934 }
1935
1936
1937 static ir_node *create_incdec(const unary_expression_t *expression)
1938 {
1939         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1940         const expression_t *value_expr = expression->value;
1941         ir_node            *addr       = expression_to_addr(value_expr);
1942         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1943
1944         type_t  *type = skip_typeref(expression->base.type);
1945         ir_mode *mode = get_ir_mode(expression->base.type);
1946
1947         ir_node *offset;
1948         if (is_type_pointer(type)) {
1949                 pointer_type_t *pointer_type = &type->pointer;
1950                 offset                       = get_type_size(pointer_type->points_to);
1951         } else {
1952                 assert(is_type_arithmetic(type));
1953                 offset = new_Const(mode, get_mode_one(mode));
1954         }
1955
1956         ir_node *result;
1957         ir_node *store_value;
1958         switch(expression->base.kind) {
1959         case EXPR_UNARY_POSTFIX_INCREMENT:
1960                 result      = value;
1961                 store_value = new_d_Add(dbgi, value, offset, mode);
1962                 break;
1963         case EXPR_UNARY_POSTFIX_DECREMENT:
1964                 result      = value;
1965                 store_value = new_d_Sub(dbgi, value, offset, mode);
1966                 break;
1967         case EXPR_UNARY_PREFIX_INCREMENT:
1968                 result      = new_d_Add(dbgi, value, offset, mode);
1969                 store_value = result;
1970                 break;
1971         case EXPR_UNARY_PREFIX_DECREMENT:
1972                 result      = new_d_Sub(dbgi, value, offset, mode);
1973                 store_value = result;
1974                 break;
1975         default:
1976                 panic("no incdec expr in create_incdec");
1977         }
1978
1979         set_value_for_expression_addr(value_expr, store_value, addr);
1980
1981         return result;
1982 }
1983
1984 static bool is_local_variable(expression_t *expression)
1985 {
1986         if (expression->kind != EXPR_REFERENCE)
1987                 return false;
1988         reference_expression_t *ref_expr = &expression->reference;
1989         entity_t               *entity   = ref_expr->entity;
1990         if (entity->kind != ENTITY_VARIABLE)
1991                 return false;
1992         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1993         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
1994 }
1995
1996 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1997 {
1998         switch(kind) {
1999         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2000         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2001         case EXPR_BINARY_NOTEQUAL:
2002                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2003         case EXPR_BINARY_ISLESS:
2004         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2005         case EXPR_BINARY_ISLESSEQUAL:
2006         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2007         case EXPR_BINARY_ISGREATER:
2008         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2009         case EXPR_BINARY_ISGREATEREQUAL:
2010         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2011         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2012
2013         default:
2014                 break;
2015         }
2016         panic("trying to get pn_Cmp from non-comparison binexpr type");
2017 }
2018
2019 /**
2020  * Handle the assume optimizer hint: check if a Confirm
2021  * node can be created.
2022  *
2023  * @param dbi    debug info
2024  * @param expr   the IL assume expression
2025  *
2026  * we support here only some simple cases:
2027  *  - var rel const
2028  *  - const rel val
2029  *  - var rel var
2030  */
2031 static ir_node *handle_assume_compare(dbg_info *dbi,
2032                                       const binary_expression_t *expression)
2033 {
2034         expression_t *op1 = expression->left;
2035         expression_t *op2 = expression->right;
2036         entity_t     *var2, *var = NULL;
2037         ir_node      *res = NULL;
2038         pn_Cmp        cmp_val;
2039
2040         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2041
2042         if (is_local_variable(op1) && is_local_variable(op2)) {
2043         var  = op1->reference.entity;
2044             var2 = op2->reference.entity;
2045
2046                 type_t  *const type = skip_typeref(var->declaration.type);
2047                 ir_mode *const mode = get_ir_mode(type);
2048
2049                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2050                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2051
2052                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2053                 set_value(var2->variable.v.value_number, res);
2054
2055                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2056                 set_value(var->variable.v.value_number, res);
2057
2058                 return res;
2059         }
2060
2061         expression_t *con;
2062         if (is_local_variable(op1) && is_constant_expression(op2)) {
2063                 var = op1->reference.entity;
2064                 con = op2;
2065         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2066                 cmp_val = get_inversed_pnc(cmp_val);
2067                 var = op2->reference.entity;
2068                 con = op1;
2069         }
2070
2071         if (var != NULL) {
2072                 type_t  *const type = skip_typeref(var->declaration.type);
2073                 ir_mode *const mode = get_ir_mode(type);
2074
2075                 res = get_value(var->variable.v.value_number, mode);
2076                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2077                 set_value(var->variable.v.value_number, res);
2078         }
2079         return res;
2080 }
2081
2082 /**
2083  * Handle the assume optimizer hint.
2084  *
2085  * @param dbi    debug info
2086  * @param expr   the IL assume expression
2087  */
2088 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2089         switch(expression->kind) {
2090         case EXPR_BINARY_EQUAL:
2091         case EXPR_BINARY_NOTEQUAL:
2092         case EXPR_BINARY_LESS:
2093         case EXPR_BINARY_LESSEQUAL:
2094         case EXPR_BINARY_GREATER:
2095         case EXPR_BINARY_GREATEREQUAL:
2096                 return handle_assume_compare(dbi, &expression->binary);
2097         default:
2098                 return NULL;
2099         }
2100 }
2101
2102 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2103 {
2104         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2105         type_t   *type = skip_typeref(expression->base.type);
2106
2107         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2108                 return expression_to_addr(expression->value);
2109
2110         const expression_t *value = expression->value;
2111
2112         switch(expression->base.kind) {
2113         case EXPR_UNARY_NEGATE: {
2114                 ir_node *value_node = expression_to_firm(value);
2115                 ir_mode *mode = get_ir_mode(type);
2116                 return new_d_Minus(dbgi, value_node, mode);
2117         }
2118         case EXPR_UNARY_PLUS:
2119                 return expression_to_firm(value);
2120         case EXPR_UNARY_BITWISE_NEGATE: {
2121                 ir_node *value_node = expression_to_firm(value);
2122                 ir_mode *mode = get_ir_mode(type);
2123                 return new_d_Not(dbgi, value_node, mode);
2124         }
2125         case EXPR_UNARY_NOT: {
2126                 ir_node *value_node = _expression_to_firm(value);
2127                 value_node          = create_conv(dbgi, value_node, mode_b);
2128                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2129                 return res;
2130         }
2131         case EXPR_UNARY_DEREFERENCE: {
2132                 ir_node *value_node = expression_to_firm(value);
2133                 type_t  *value_type = skip_typeref(value->base.type);
2134                 assert(is_type_pointer(value_type));
2135                 type_t  *points_to  = value_type->pointer.points_to;
2136                 return deref_address(dbgi, points_to, value_node);
2137         }
2138         case EXPR_UNARY_POSTFIX_INCREMENT:
2139         case EXPR_UNARY_POSTFIX_DECREMENT:
2140         case EXPR_UNARY_PREFIX_INCREMENT:
2141         case EXPR_UNARY_PREFIX_DECREMENT:
2142                 return create_incdec(expression);
2143         case EXPR_UNARY_CAST: {
2144                 ir_node *value_node = expression_to_firm(value);
2145                 if (is_type_scalar(type)) {
2146                         ir_mode *mode = get_ir_mode(type);
2147                         ir_node *node = create_conv(dbgi, value_node, mode);
2148                         node = do_strict_conv(dbgi, node);
2149                         return node;
2150                 } else {
2151                         /* make sure firm type is constructed */
2152                         (void) get_ir_type(type);
2153                         return value_node;
2154                 }
2155         }
2156         case EXPR_UNARY_CAST_IMPLICIT: {
2157                 ir_node *value_node = expression_to_firm(value);
2158                 if (is_type_scalar(type)) {
2159                         ir_mode *mode = get_ir_mode(type);
2160                         return create_conv(dbgi, value_node, mode);
2161                 } else {
2162                         return value_node;
2163                 }
2164         }
2165         case EXPR_UNARY_ASSUME:
2166                 if (firm_opt.confirm)
2167                         return handle_assume(dbgi, value);
2168                 else
2169                         return NULL;
2170
2171         default:
2172                 break;
2173         }
2174         panic("invalid UNEXPR type found");
2175 }
2176
2177 /**
2178  * produces a 0/1 depending of the value of a mode_b node
2179  */
2180 static ir_node *produce_condition_result(const expression_t *expression,
2181                                          dbg_info *dbgi)
2182 {
2183         ir_mode *mode      = get_ir_mode(expression->base.type);
2184         ir_node *cur_block = get_cur_block();
2185
2186         ir_node *one_block = new_immBlock();
2187         ir_node *one       = new_Const(mode, get_mode_one(mode));
2188         ir_node *jmp_one   = new_d_Jmp(dbgi);
2189
2190         ir_node *zero_block = new_immBlock();
2191         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2192         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2193
2194         set_cur_block(cur_block);
2195         create_condition_evaluation(expression, one_block, zero_block);
2196         mature_immBlock(one_block);
2197         mature_immBlock(zero_block);
2198
2199         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2200         new_Block(2, in_cf);
2201
2202         ir_node *in[2] = { one, zero };
2203         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2204
2205         return val;
2206 }
2207
2208 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2209                 ir_node *value, type_t *type)
2210 {
2211         pointer_type_t *const pointer_type = &type->pointer;
2212         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2213         unsigned              elem_size    = get_type_size_const(points_to);
2214
2215         /* gcc extension: allow arithmetic with void * and function * */
2216         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2217             is_type_function(points_to))  {
2218                 elem_size = 1;
2219         }
2220
2221         assert(elem_size >= 1);
2222         if (elem_size == 1)
2223                 return value;
2224
2225         value = create_conv(dbgi, value, mode_int);
2226         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2227         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2228         return mul;
2229 }
2230
2231 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2232                           ir_node *left, ir_node *right)
2233 {
2234         ir_mode  *mode;
2235         type_t   *type_left  = skip_typeref(expression->left->base.type);
2236         type_t   *type_right = skip_typeref(expression->right->base.type);
2237
2238         expression_kind_t kind = expression->base.kind;
2239
2240         switch (kind) {
2241         case EXPR_BINARY_SHIFTLEFT:
2242         case EXPR_BINARY_SHIFTRIGHT:
2243         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2244         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2245                 mode  = get_irn_mode(left);
2246                 right = create_conv(dbgi, right, mode_uint);
2247                 break;
2248
2249         case EXPR_BINARY_SUB:
2250                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2251                         const pointer_type_t *const ptr_type = &type_left->pointer;
2252
2253                         mode = get_ir_mode(expression->base.type);
2254                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2255                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2256                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2257                         ir_node *const no_mem    = new_NoMem();
2258                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2259                                                                                                    mode, op_pin_state_floats);
2260                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2261                 }
2262                 /* fallthrough */
2263         case EXPR_BINARY_SUB_ASSIGN:
2264                 if (is_type_pointer(type_left)) {
2265                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2266                         mode  = get_ir_mode(type_left);
2267                         break;
2268                 }
2269                 goto normal_node;
2270
2271         case EXPR_BINARY_ADD:
2272         case EXPR_BINARY_ADD_ASSIGN:
2273                 if (is_type_pointer(type_left)) {
2274                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2275                         mode  = get_ir_mode(type_left);
2276                         break;
2277                 } else if (is_type_pointer(type_right)) {
2278                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2279                         mode  = get_ir_mode(type_right);
2280                         break;
2281                 }
2282                 goto normal_node;
2283
2284         default:
2285 normal_node:
2286                 mode = get_irn_mode(right);
2287                 left = create_conv(dbgi, left, mode);
2288                 break;
2289         }
2290
2291         switch (kind) {
2292         case EXPR_BINARY_ADD_ASSIGN:
2293         case EXPR_BINARY_ADD:
2294                 return new_d_Add(dbgi, left, right, mode);
2295         case EXPR_BINARY_SUB_ASSIGN:
2296         case EXPR_BINARY_SUB:
2297                 return new_d_Sub(dbgi, left, right, mode);
2298         case EXPR_BINARY_MUL_ASSIGN:
2299         case EXPR_BINARY_MUL:
2300                 return new_d_Mul(dbgi, left, right, mode);
2301         case EXPR_BINARY_BITWISE_AND:
2302         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2303                 return new_d_And(dbgi, left, right, mode);
2304         case EXPR_BINARY_BITWISE_OR:
2305         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2306                 return new_d_Or(dbgi, left, right, mode);
2307         case EXPR_BINARY_BITWISE_XOR:
2308         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2309                 return new_d_Eor(dbgi, left, right, mode);
2310         case EXPR_BINARY_SHIFTLEFT:
2311         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2312                 return new_d_Shl(dbgi, left, right, mode);
2313         case EXPR_BINARY_SHIFTRIGHT:
2314         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2315                 if (mode_is_signed(mode)) {
2316                         return new_d_Shrs(dbgi, left, right, mode);
2317                 } else {
2318                         return new_d_Shr(dbgi, left, right, mode);
2319                 }
2320         case EXPR_BINARY_DIV:
2321         case EXPR_BINARY_DIV_ASSIGN: {
2322                 ir_node *pin = new_Pin(new_NoMem());
2323                 ir_node *op;
2324                 ir_node *res;
2325                 if (mode_is_float(mode)) {
2326                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2327                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2328                 } else {
2329                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2330                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2331                 }
2332                 return res;
2333         }
2334         case EXPR_BINARY_MOD:
2335         case EXPR_BINARY_MOD_ASSIGN: {
2336                 ir_node *pin = new_Pin(new_NoMem());
2337                 assert(!mode_is_float(mode));
2338                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2339                                          op_pin_state_floats);
2340                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2341                 return res;
2342         }
2343         default:
2344                 panic("unexpected expression kind");
2345         }
2346 }
2347
2348 static ir_node *create_lazy_op(const binary_expression_t *expression)
2349 {
2350         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2351         type_t   *type = expression->base.type;
2352         ir_mode  *mode = get_ir_mode(type);
2353
2354         if (is_constant_expression(expression->left)) {
2355                 long val = fold_constant(expression->left);
2356                 expression_kind_t ekind = expression->base.kind;
2357                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2358                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2359                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2360                         return expression_to_firm(expression->right);
2361                 } else {
2362                         return new_Const(mode, get_mode_one(mode));
2363                 }
2364         }
2365
2366         return produce_condition_result((const expression_t*) expression, dbgi);
2367 }
2368
2369 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2370                                             ir_node *right, ir_mode *mode);
2371
2372 static ir_node *create_assign_binop(const binary_expression_t *expression)
2373 {
2374         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2375         const expression_t *left_expr = expression->left;
2376         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2377         ir_node            *right     = expression_to_firm(expression->right);
2378         ir_node            *left_addr = expression_to_addr(left_expr);
2379         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2380         ir_node            *result    = create_op(dbgi, expression, left, right);
2381
2382         result = create_conv(dbgi, result, left_mode);
2383         result = do_strict_conv(dbgi, result);
2384
2385         set_value_for_expression_addr(left_expr, result, left_addr);
2386
2387         return result;
2388 }
2389
2390 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2391 {
2392         expression_kind_t kind = expression->base.kind;
2393
2394         switch(kind) {
2395         case EXPR_BINARY_EQUAL:
2396         case EXPR_BINARY_NOTEQUAL:
2397         case EXPR_BINARY_LESS:
2398         case EXPR_BINARY_LESSEQUAL:
2399         case EXPR_BINARY_GREATER:
2400         case EXPR_BINARY_GREATEREQUAL:
2401         case EXPR_BINARY_ISGREATER:
2402         case EXPR_BINARY_ISGREATEREQUAL:
2403         case EXPR_BINARY_ISLESS:
2404         case EXPR_BINARY_ISLESSEQUAL:
2405         case EXPR_BINARY_ISLESSGREATER:
2406         case EXPR_BINARY_ISUNORDERED: {
2407                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2408                 ir_node *left  = expression_to_firm(expression->left);
2409                 ir_node *right = expression_to_firm(expression->right);
2410                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2411                 long     pnc   = get_pnc(kind, expression->left->base.type);
2412                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2413                 return proj;
2414         }
2415         case EXPR_BINARY_ASSIGN: {
2416                 ir_node *addr  = expression_to_addr(expression->left);
2417                 ir_node *right = expression_to_firm(expression->right);
2418                 set_value_for_expression_addr(expression->left, right, addr);
2419
2420                 return right;
2421         }
2422         case EXPR_BINARY_ADD:
2423         case EXPR_BINARY_SUB:
2424         case EXPR_BINARY_MUL:
2425         case EXPR_BINARY_DIV:
2426         case EXPR_BINARY_MOD:
2427         case EXPR_BINARY_BITWISE_AND:
2428         case EXPR_BINARY_BITWISE_OR:
2429         case EXPR_BINARY_BITWISE_XOR:
2430         case EXPR_BINARY_SHIFTLEFT:
2431         case EXPR_BINARY_SHIFTRIGHT:
2432         {
2433                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2434                 ir_node  *left  = expression_to_firm(expression->left);
2435                 ir_node  *right = expression_to_firm(expression->right);
2436                 return create_op(dbgi, expression, left, right);
2437         }
2438         case EXPR_BINARY_LOGICAL_AND:
2439         case EXPR_BINARY_LOGICAL_OR:
2440                 return create_lazy_op(expression);
2441         case EXPR_BINARY_COMMA:
2442                 /* create side effects of left side */
2443                 (void) expression_to_firm(expression->left);
2444                 return _expression_to_firm(expression->right);
2445
2446         case EXPR_BINARY_ADD_ASSIGN:
2447         case EXPR_BINARY_SUB_ASSIGN:
2448         case EXPR_BINARY_MUL_ASSIGN:
2449         case EXPR_BINARY_MOD_ASSIGN:
2450         case EXPR_BINARY_DIV_ASSIGN:
2451         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2452         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2453         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2454         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2455         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2456                 return create_assign_binop(expression);
2457         case EXPR_BINARY_BUILTIN_EXPECT:
2458                 return _expression_to_firm(expression->left);
2459         default:
2460                 panic("TODO binexpr type");
2461         }
2462 }
2463
2464 static ir_node *array_access_addr(const array_access_expression_t *expression)
2465 {
2466         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2467         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2468         ir_node  *offset    = expression_to_firm(expression->index);
2469
2470         type_t  *offset_type = skip_typeref(expression->index->base.type);
2471         ir_mode *mode;
2472         if (is_type_signed(offset_type)) {
2473                 mode = get_ir_mode(type_ssize_t);
2474         } else {
2475                 mode = get_ir_mode(type_size_t);
2476         }
2477         offset = create_conv(dbgi, offset, mode);
2478
2479         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2480         assert(is_type_pointer(ref_type));
2481         pointer_type_t *pointer_type = &ref_type->pointer;
2482
2483         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2484         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2485         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2486                                              mode);
2487         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2488
2489         return result;
2490 }
2491
2492 static ir_node *array_access_to_firm(
2493                 const array_access_expression_t *expression)
2494 {
2495         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2496         ir_node  *addr   = array_access_addr(expression);
2497         type_t   *type   = revert_automatic_type_conversion(
2498                         (const expression_t*) expression);
2499         type             = skip_typeref(type);
2500
2501         return deref_address(dbgi, type, addr);
2502 }
2503
2504 static long get_offsetof_offset(const offsetof_expression_t *expression)
2505 {
2506         type_t *orig_type = expression->type;
2507         long    offset    = 0;
2508
2509         designator_t *designator = expression->designator;
2510         for ( ; designator != NULL; designator = designator->next) {
2511                 type_t *type = skip_typeref(orig_type);
2512                 /* be sure the type is constructed */
2513                 (void) get_ir_type(type);
2514
2515                 if (designator->symbol != NULL) {
2516                         assert(is_type_compound(type));
2517                         symbol_t *symbol = designator->symbol;
2518
2519                         compound_t *compound = type->compound.compound;
2520                         entity_t   *iter     = compound->members.entities;
2521                         for ( ; iter != NULL; iter = iter->base.next) {
2522                                 if (iter->base.symbol == symbol) {
2523                                         break;
2524                                 }
2525                         }
2526                         assert(iter != NULL);
2527
2528                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2529                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2530                         offset += get_entity_offset(iter->compound_member.entity);
2531
2532                         orig_type = iter->declaration.type;
2533                 } else {
2534                         expression_t *array_index = designator->array_index;
2535                         assert(designator->array_index != NULL);
2536                         assert(is_type_array(type));
2537
2538                         long index         = fold_constant(array_index);
2539                         ir_type *arr_type  = get_ir_type(type);
2540                         ir_type *elem_type = get_array_element_type(arr_type);
2541                         long     elem_size = get_type_size_bytes(elem_type);
2542
2543                         offset += index * elem_size;
2544
2545                         orig_type = type->array.element_type;
2546                 }
2547         }
2548
2549         return offset;
2550 }
2551
2552 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2553 {
2554         ir_mode  *mode   = get_ir_mode(expression->base.type);
2555         long      offset = get_offsetof_offset(expression);
2556         tarval   *tv     = new_tarval_from_long(offset, mode);
2557         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2558
2559         return new_d_Const(dbgi, mode, tv);
2560 }
2561
2562 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2563                                      ir_entity *entity, type_t *type);
2564
2565 static ir_node *compound_literal_to_firm(
2566                 const compound_literal_expression_t *expression)
2567 {
2568         type_t *type = expression->type;
2569
2570         /* create an entity on the stack */
2571         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2572
2573         ident     *const id     = id_unique("CompLit.%u");
2574         ir_type   *const irtype = get_ir_type(type);
2575         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2576         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2577         set_entity_ld_ident(entity, id);
2578
2579         set_entity_variability(entity, variability_uninitialized);
2580
2581         /* create initialisation code */
2582         initializer_t *initializer = expression->initializer;
2583         create_local_initializer(initializer, dbgi, entity, type);
2584
2585         /* create a sel for the compound literal address */
2586         ir_node *frame = get_local_frame(entity);
2587         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2588         return sel;
2589 }
2590
2591 /**
2592  * Transform a sizeof expression into Firm code.
2593  */
2594 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2595 {
2596         type_t *type = expression->type;
2597         if (type == NULL) {
2598                 type = expression->tp_expression->base.type;
2599                 assert(type != NULL);
2600         }
2601
2602         type = skip_typeref(type);
2603         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2604         if (is_type_array(type) && type->array.is_vla
2605                         && expression->tp_expression != NULL) {
2606                 expression_to_firm(expression->tp_expression);
2607         }
2608
2609         return get_type_size(type);
2610 }
2611
2612 /**
2613  * Transform an alignof expression into Firm code.
2614  */
2615 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2616 {
2617         type_t *type = expression->type;
2618         if (type == NULL) {
2619                 /* beware: if expression is a variable reference, return the
2620                    alignment of the variable. */
2621                 const expression_t *tp_expression = expression->tp_expression;
2622                 const entity_t     *entity        = expression_is_variable(tp_expression);
2623                 if (entity != NULL) {
2624                         /* TODO: get the alignment of this variable. */
2625                         (void) entity;
2626                 }
2627                 type = tp_expression->base.type;
2628                 assert(type != NULL);
2629         }
2630
2631         ir_mode *const mode = get_ir_mode(expression->base.type);
2632         symconst_symbol sym;
2633         sym.type_p = get_ir_type(type);
2634         return new_SymConst(mode, sym, symconst_type_align);
2635 }
2636
2637 static void init_ir_types(void);
2638
2639 long fold_constant(const expression_t *expression)
2640 {
2641         assert(is_type_valid(skip_typeref(expression->base.type)));
2642
2643         bool constant_folding_old = constant_folding;
2644         constant_folding = true;
2645
2646         init_ir_types();
2647
2648         assert(is_constant_expression(expression));
2649
2650         ir_graph *old_current_ir_graph = current_ir_graph;
2651         if (current_ir_graph == NULL) {
2652                 current_ir_graph = get_const_code_irg();
2653         }
2654
2655         ir_node *cnst = expression_to_firm(expression);
2656         current_ir_graph = old_current_ir_graph;
2657
2658         if (!is_Const(cnst)) {
2659                 panic("couldn't fold constant\n");
2660         }
2661
2662         tarval *tv = get_Const_tarval(cnst);
2663         if (!tarval_is_long(tv)) {
2664                 panic("result of constant folding is not integer\n");
2665         }
2666
2667         constant_folding = constant_folding_old;
2668
2669         return get_tarval_long(tv);
2670 }
2671
2672 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2673 {
2674         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2675
2676         /* first try to fold a constant condition */
2677         if (is_constant_expression(expression->condition)) {
2678                 long val = fold_constant(expression->condition);
2679                 if (val) {
2680                         expression_t *true_expression = expression->true_expression;
2681                         if (true_expression == NULL)
2682                                 true_expression = expression->condition;
2683                         return expression_to_firm(true_expression);
2684                 } else {
2685                         return expression_to_firm(expression->false_expression);
2686                 }
2687         }
2688
2689         ir_node *cur_block   = get_cur_block();
2690
2691         /* create the true block */
2692         ir_node *true_block  = new_immBlock();
2693
2694         ir_node *true_val = expression->true_expression != NULL ?
2695                 expression_to_firm(expression->true_expression) : NULL;
2696         ir_node *true_jmp = new_Jmp();
2697
2698         /* create the false block */
2699         ir_node *false_block = new_immBlock();
2700
2701         ir_node *false_val = expression_to_firm(expression->false_expression);
2702         ir_node *false_jmp = new_Jmp();
2703
2704         /* create the condition evaluation */
2705         set_cur_block(cur_block);
2706         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2707         if (expression->true_expression == NULL) {
2708                 if (cond_expr != NULL) {
2709                         true_val = cond_expr;
2710                 } else {
2711                         /* Condition ended with a short circuit (&&, ||, !) operation.
2712                          * Generate a "1" as value for the true branch. */
2713                         ir_mode *const mode = mode_Is;
2714                         true_val = new_Const(mode, get_mode_one(mode));
2715                 }
2716         }
2717         mature_immBlock(true_block);
2718         mature_immBlock(false_block);
2719
2720         /* create the common block */
2721         ir_node *in_cf[2] = { true_jmp, false_jmp };
2722         new_Block(2, in_cf);
2723
2724         /* TODO improve static semantics, so either both or no values are NULL */
2725         if (true_val == NULL || false_val == NULL)
2726                 return NULL;
2727
2728         ir_node *in[2] = { true_val, false_val };
2729         ir_mode *mode  = get_irn_mode(true_val);
2730         assert(get_irn_mode(false_val) == mode);
2731         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2732
2733         return val;
2734 }
2735
2736 /**
2737  * Returns an IR-node representing the address of a field.
2738  */
2739 static ir_node *select_addr(const select_expression_t *expression)
2740 {
2741         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2742
2743         construct_select_compound(expression);
2744
2745         ir_node *compound_addr = expression_to_firm(expression->compound);
2746
2747         entity_t *entry = expression->compound_entry;
2748         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2749         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2750         ir_entity *irentity = entry->compound_member.entity;
2751
2752         assert(irentity != NULL);
2753
2754         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2755
2756         return sel;
2757 }
2758
2759 static ir_node *select_to_firm(const select_expression_t *expression)
2760 {
2761         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2762         ir_node  *addr = select_addr(expression);
2763         type_t   *type = revert_automatic_type_conversion(
2764                         (const expression_t*) expression);
2765         type           = skip_typeref(type);
2766
2767         entity_t *entry      = expression->compound_entry;
2768         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2769         type_t   *entry_type = skip_typeref(entry->declaration.type);
2770
2771         if (entry_type->kind == TYPE_BITFIELD) {
2772                 return bitfield_extract_to_firm(expression, addr);
2773         }
2774
2775         return deref_address(dbgi, type, addr);
2776 }
2777
2778 /* Values returned by __builtin_classify_type. */
2779 typedef enum gcc_type_class
2780 {
2781         no_type_class = -1,
2782         void_type_class,
2783         integer_type_class,
2784         char_type_class,
2785         enumeral_type_class,
2786         boolean_type_class,
2787         pointer_type_class,
2788         reference_type_class,
2789         offset_type_class,
2790         real_type_class,
2791         complex_type_class,
2792         function_type_class,
2793         method_type_class,
2794         record_type_class,
2795         union_type_class,
2796         array_type_class,
2797         string_type_class,
2798         set_type_class,
2799         file_type_class,
2800         lang_type_class
2801 } gcc_type_class;
2802
2803 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2804 {
2805         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2806
2807         gcc_type_class tc;
2808         switch (type->kind)
2809         {
2810                 case TYPE_ATOMIC: {
2811                         const atomic_type_t *const atomic_type = &type->atomic;
2812                         switch (atomic_type->akind) {
2813                                 /* should not be reached */
2814                                 case ATOMIC_TYPE_INVALID:
2815                                         tc = no_type_class;
2816                                         goto make_const;
2817
2818                                 /* gcc cannot do that */
2819                                 case ATOMIC_TYPE_VOID:
2820                                         tc = void_type_class;
2821                                         goto make_const;
2822
2823                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2824                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2825                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2826                                 case ATOMIC_TYPE_SHORT:
2827                                 case ATOMIC_TYPE_USHORT:
2828                                 case ATOMIC_TYPE_INT:
2829                                 case ATOMIC_TYPE_UINT:
2830                                 case ATOMIC_TYPE_LONG:
2831                                 case ATOMIC_TYPE_ULONG:
2832                                 case ATOMIC_TYPE_LONGLONG:
2833                                 case ATOMIC_TYPE_ULONGLONG:
2834                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2835                                         tc = integer_type_class;
2836                                         goto make_const;
2837
2838                                 case ATOMIC_TYPE_FLOAT:
2839                                 case ATOMIC_TYPE_DOUBLE:
2840                                 case ATOMIC_TYPE_LONG_DOUBLE:
2841                                         tc = real_type_class;
2842                                         goto make_const;
2843                         }
2844                         panic("Unexpected atomic type in classify_type_to_firm().");
2845                 }
2846
2847                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2848                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2849                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2850                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2851                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2852                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2853                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2854                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2855
2856                 /* gcc handles this as integer */
2857                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2858
2859                 case TYPE_BUILTIN:
2860                 /* typedef/typeof should be skipped already */
2861                 case TYPE_TYPEDEF:
2862                 case TYPE_TYPEOF:
2863                 case TYPE_INVALID:
2864                 case TYPE_ERROR:
2865                         break;
2866         }
2867         panic("unexpected TYPE classify_type_to_firm().");
2868
2869 make_const: ;
2870         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2871         ir_mode  *const mode = mode_int;
2872         tarval   *const tv   = new_tarval_from_long(tc, mode);
2873         return new_d_Const(dbgi, mode, tv);
2874 }
2875
2876 static ir_node *function_name_to_firm(
2877                 const funcname_expression_t *const expr)
2878 {
2879         switch(expr->kind) {
2880         case FUNCNAME_FUNCTION:
2881         case FUNCNAME_PRETTY_FUNCTION:
2882         case FUNCNAME_FUNCDNAME:
2883                 if (current_function_name == NULL) {
2884                         const source_position_t *const src_pos = &expr->base.source_position;
2885                         const char    *name  = current_function_entity->base.symbol->string;
2886                         const string_t string = { name, strlen(name) + 1 };
2887                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2888                 }
2889                 return current_function_name;
2890         case FUNCNAME_FUNCSIG:
2891                 if (current_funcsig == NULL) {
2892                         const source_position_t *const src_pos = &expr->base.source_position;
2893                         ir_entity *ent = get_irg_entity(current_ir_graph);
2894                         const char *const name = get_entity_ld_name(ent);
2895                         const string_t string = { name, strlen(name) + 1 };
2896                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2897                 }
2898                 return current_funcsig;
2899         }
2900         panic("Unsupported function name");
2901 }
2902
2903 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2904 {
2905         statement_t *statement = expr->statement;
2906
2907         assert(statement->kind == STATEMENT_COMPOUND);
2908         return compound_statement_to_firm(&statement->compound);
2909 }
2910
2911 static ir_node *va_start_expression_to_firm(
2912         const va_start_expression_t *const expr)
2913 {
2914         type_t    *const type        = current_function_entity->declaration.type;
2915         ir_type   *const method_type = get_ir_type(type);
2916         int        const n           = get_method_n_params(method_type) - 1;
2917         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2918         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2919         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2920         ir_node   *const no_mem      = new_NoMem();
2921         ir_node   *const arg_sel     =
2922                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2923
2924         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2925         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2926         set_value_for_expression(expr->ap, add);
2927
2928         return NULL;
2929 }
2930
2931 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2932 {
2933         type_t       *const type    = expr->base.type;
2934         expression_t *const ap_expr = expr->ap;
2935         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2936         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2937         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2938         ir_node      *const res     = deref_address(dbgi, type, ap);
2939
2940         ir_node      *const cnst    = get_type_size(expr->base.type);
2941         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2942
2943         set_value_for_expression_addr(ap_expr, add, ap_addr);
2944
2945         return res;
2946 }
2947
2948 static ir_node *dereference_addr(const unary_expression_t *const expression)
2949 {
2950         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2951         return expression_to_firm(expression->value);
2952 }
2953
2954 /**
2955  * Returns a IR-node representing an lvalue of the given expression.
2956  */
2957 static ir_node *expression_to_addr(const expression_t *expression)
2958 {
2959         switch(expression->kind) {
2960         case EXPR_REFERENCE:
2961                 return reference_addr(&expression->reference);
2962         case EXPR_ARRAY_ACCESS:
2963                 return array_access_addr(&expression->array_access);
2964         case EXPR_SELECT:
2965                 return select_addr(&expression->select);
2966         case EXPR_CALL:
2967                 return call_expression_to_firm(&expression->call);
2968         case EXPR_UNARY_DEREFERENCE: {
2969                 return dereference_addr(&expression->unary);
2970         }
2971         default:
2972                 break;
2973         }
2974         panic("trying to get address of non-lvalue");
2975 }
2976
2977 static ir_node *builtin_constant_to_firm(
2978                 const builtin_constant_expression_t *expression)
2979 {
2980         ir_mode *mode = get_ir_mode(expression->base.type);
2981         long     v;
2982
2983         if (is_constant_expression(expression->value)) {
2984                 v = 1;
2985         } else {
2986                 v = 0;
2987         }
2988         return new_Const_long(mode, v);
2989 }
2990
2991 static ir_node *builtin_prefetch_to_firm(
2992                 const builtin_prefetch_expression_t *expression)
2993 {
2994         ir_node *adr = expression_to_firm(expression->adr);
2995         /* no Firm support for prefetch yet */
2996         (void) adr;
2997         return NULL;
2998 }
2999
3000 static ir_node *get_label_block(label_t *label)
3001 {
3002         if (label->block != NULL)
3003                 return label->block;
3004
3005         /* beware: might be called from create initializer with current_ir_graph
3006          * set to const_code_irg. */
3007         ir_graph *rem    = current_ir_graph;
3008         current_ir_graph = current_function;
3009
3010         ir_node *old_cur_block = get_cur_block();
3011         ir_node *block         = new_immBlock();
3012         set_cur_block(old_cur_block);
3013
3014         label->block = block;
3015
3016         ARR_APP1(label_t *, all_labels, label);
3017
3018         current_ir_graph = rem;
3019         return block;
3020 }
3021
3022 /**
3023  * Pointer to a label.  This is used for the
3024  * GNU address-of-label extension.
3025  */
3026 static ir_node *label_address_to_firm(
3027                 const label_address_expression_t *label)
3028 {
3029         ir_node    *block = get_label_block(label->label);
3030         ir_label_t  nr    = get_Block_label(block);
3031
3032         if (nr == 0) {
3033                 nr = get_irp_next_label_nr();
3034                 set_Block_label(block, nr);
3035         }
3036         symconst_symbol value;
3037         value.label = nr;
3038         return new_SymConst(mode_P_code, value, symconst_label);
3039 }
3040
3041 /**
3042  * creates firm nodes for an expression. The difference between this function
3043  * and expression_to_firm is, that this version might produce mode_b nodes
3044  * instead of mode_Is.
3045  */
3046 static ir_node *_expression_to_firm(const expression_t *expression)
3047 {
3048 #ifndef NDEBUG
3049         if (!constant_folding) {
3050                 assert(!expression->base.transformed);
3051                 ((expression_t*) expression)->base.transformed = true;
3052         }
3053 #endif
3054
3055         switch (expression->kind) {
3056         case EXPR_CHARACTER_CONSTANT:
3057                 return character_constant_to_firm(&expression->conste);
3058         case EXPR_WIDE_CHARACTER_CONSTANT:
3059                 return wide_character_constant_to_firm(&expression->conste);
3060         case EXPR_CONST:
3061                 return const_to_firm(&expression->conste);
3062         case EXPR_STRING_LITERAL:
3063                 return string_literal_to_firm(&expression->string);
3064         case EXPR_WIDE_STRING_LITERAL:
3065                 return wide_string_literal_to_firm(&expression->wide_string);
3066         case EXPR_REFERENCE:
3067                 return reference_expression_to_firm(&expression->reference);
3068         case EXPR_REFERENCE_ENUM_VALUE:
3069                 return reference_expression_enum_value_to_firm(&expression->reference);
3070         case EXPR_CALL:
3071                 return call_expression_to_firm(&expression->call);
3072         EXPR_UNARY_CASES
3073                 return unary_expression_to_firm(&expression->unary);
3074         EXPR_BINARY_CASES
3075                 return binary_expression_to_firm(&expression->binary);
3076         case EXPR_ARRAY_ACCESS:
3077                 return array_access_to_firm(&expression->array_access);
3078         case EXPR_SIZEOF:
3079                 return sizeof_to_firm(&expression->typeprop);
3080         case EXPR_ALIGNOF:
3081                 return alignof_to_firm(&expression->typeprop);
3082         case EXPR_CONDITIONAL:
3083                 return conditional_to_firm(&expression->conditional);
3084         case EXPR_SELECT:
3085                 return select_to_firm(&expression->select);
3086         case EXPR_CLASSIFY_TYPE:
3087                 return classify_type_to_firm(&expression->classify_type);
3088         case EXPR_FUNCNAME:
3089                 return function_name_to_firm(&expression->funcname);
3090         case EXPR_STATEMENT:
3091                 return statement_expression_to_firm(&expression->statement);
3092         case EXPR_VA_START:
3093                 return va_start_expression_to_firm(&expression->va_starte);
3094         case EXPR_VA_ARG:
3095                 return va_arg_expression_to_firm(&expression->va_arge);
3096         case EXPR_BUILTIN_SYMBOL:
3097                 panic("unimplemented expression found");
3098         case EXPR_BUILTIN_CONSTANT_P:
3099                 return builtin_constant_to_firm(&expression->builtin_constant);
3100         case EXPR_BUILTIN_PREFETCH:
3101                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3102         case EXPR_OFFSETOF:
3103                 return offsetof_to_firm(&expression->offsetofe);
3104         case EXPR_COMPOUND_LITERAL:
3105                 return compound_literal_to_firm(&expression->compound_literal);
3106         case EXPR_LABEL_ADDRESS:
3107                 return label_address_to_firm(&expression->label_address);
3108
3109         case EXPR_UNKNOWN:
3110         case EXPR_INVALID:
3111                 break;
3112         }
3113         panic("invalid expression found");
3114 }
3115
3116 static bool produces_mode_b(const expression_t *expression)
3117 {
3118         switch (expression->kind) {
3119         case EXPR_BINARY_EQUAL:
3120         case EXPR_BINARY_NOTEQUAL:
3121         case EXPR_BINARY_LESS:
3122         case EXPR_BINARY_LESSEQUAL:
3123         case EXPR_BINARY_GREATER:
3124         case EXPR_BINARY_GREATEREQUAL:
3125         case EXPR_BINARY_ISGREATER:
3126         case EXPR_BINARY_ISGREATEREQUAL:
3127         case EXPR_BINARY_ISLESS:
3128         case EXPR_BINARY_ISLESSEQUAL:
3129         case EXPR_BINARY_ISLESSGREATER:
3130         case EXPR_BINARY_ISUNORDERED:
3131         case EXPR_UNARY_NOT:
3132                 return true;
3133
3134         case EXPR_BINARY_BUILTIN_EXPECT:
3135                 return produces_mode_b(expression->binary.left);
3136         case EXPR_BINARY_COMMA:
3137                 return produces_mode_b(expression->binary.right);
3138
3139         default:
3140                 return false;
3141         }
3142 }
3143
3144 static ir_node *expression_to_firm(const expression_t *expression)
3145 {
3146         if (!produces_mode_b(expression)) {
3147                 ir_node *res = _expression_to_firm(expression);
3148                 assert(res == NULL || get_irn_mode(res) != mode_b);
3149                 return res;
3150         }
3151
3152         if (is_constant_expression(expression)) {
3153                 ir_node *res  = _expression_to_firm(expression);
3154                 ir_mode *mode = get_ir_mode(expression->base.type);
3155                 assert(is_Const(res));
3156                 if (is_Const_null(res)) {
3157                         return new_Const_long(mode, 0);
3158                 } else {
3159                         return new_Const_long(mode, 1);
3160                 }
3161         }
3162
3163         /* we have to produce a 0/1 from the mode_b expression */
3164         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3165         return produce_condition_result(expression, dbgi);
3166 }
3167
3168 /**
3169  * create a short-circuit expression evaluation that tries to construct
3170  * efficient control flow structures for &&, || and ! expressions
3171  */
3172 static ir_node *create_condition_evaluation(const expression_t *expression,
3173                                             ir_node *true_block,
3174                                             ir_node *false_block)
3175 {
3176         switch(expression->kind) {
3177         case EXPR_UNARY_NOT: {
3178                 const unary_expression_t *unary_expression = &expression->unary;
3179                 create_condition_evaluation(unary_expression->value, false_block,
3180                                             true_block);
3181                 return NULL;
3182         }
3183         case EXPR_BINARY_LOGICAL_AND: {
3184                 const binary_expression_t *binary_expression = &expression->binary;
3185
3186                 ir_node *cur_block   = get_cur_block();
3187                 ir_node *extra_block = new_immBlock();
3188                 set_cur_block(cur_block);
3189                 create_condition_evaluation(binary_expression->left, extra_block,
3190                                             false_block);
3191                 mature_immBlock(extra_block);
3192                 set_cur_block(extra_block);
3193                 create_condition_evaluation(binary_expression->right, true_block,
3194                                             false_block);
3195                 return NULL;
3196         }
3197         case EXPR_BINARY_LOGICAL_OR: {
3198                 const binary_expression_t *binary_expression = &expression->binary;
3199
3200                 ir_node *cur_block   = get_cur_block();
3201                 ir_node *extra_block = new_immBlock();
3202                 set_cur_block(cur_block);
3203                 create_condition_evaluation(binary_expression->left, true_block,
3204                                             extra_block);
3205                 mature_immBlock(extra_block);
3206                 set_cur_block(extra_block);
3207                 create_condition_evaluation(binary_expression->right, true_block,
3208                                             false_block);
3209                 return NULL;
3210         }
3211         default:
3212                 break;
3213         }
3214
3215         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3216         ir_node  *cond_expr  = _expression_to_firm(expression);
3217         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3218         ir_node  *cond       = new_d_Cond(dbgi, condition);
3219         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3220         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3221
3222         /* set branch prediction info based on __builtin_expect */
3223         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3224                 long               cnst = fold_constant(expression->binary.right);
3225                 cond_jmp_predicate pred;
3226
3227                 if (cnst == 0) {
3228                         pred = COND_JMP_PRED_FALSE;
3229                 } else {
3230                         pred = COND_JMP_PRED_TRUE;
3231                 }
3232                 set_Cond_jmp_pred(cond, pred);
3233         }
3234
3235         add_immBlock_pred(true_block, true_proj);
3236         if (false_block != NULL) {
3237                 add_immBlock_pred(false_block, false_proj);
3238         }
3239
3240         set_cur_block(NULL);
3241         return cond_expr;
3242 }
3243
3244
3245 static void create_variable_entity(entity_t *variable,
3246                                    declaration_kind_t declaration_kind,
3247                                    ir_type *parent_type)
3248 {
3249         assert(variable->kind == ENTITY_VARIABLE);
3250         type_t    *const type     = skip_typeref(variable->declaration.type);
3251         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3252         ir_type   *const irtype   = get_ir_type(type);
3253         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3254         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3255
3256         handle_gnu_attributes_ent(irentity, variable);
3257
3258         variable->declaration.kind  = (unsigned char) declaration_kind;
3259         variable->variable.v.entity = irentity;
3260         set_entity_variability(irentity, variability_uninitialized);
3261         set_entity_ld_ident(irentity, create_ld_ident(variable));
3262         if (parent_type == get_tls_type())
3263                 set_entity_allocation(irentity, allocation_automatic);
3264         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3265                 set_entity_allocation(irentity, allocation_static);
3266
3267         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3268                 set_entity_volatility(irentity, volatility_is_volatile);
3269         }
3270 }
3271
3272
3273 typedef struct type_path_entry_t type_path_entry_t;
3274 struct type_path_entry_t {
3275         type_t           *type;
3276         ir_initializer_t *initializer;
3277         size_t            index;
3278         entity_t         *compound_entry;
3279 };
3280
3281 typedef struct type_path_t type_path_t;
3282 struct type_path_t {
3283         type_path_entry_t *path;
3284         type_t            *top_type;
3285         bool               invalid;
3286 };
3287
3288 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3289 {
3290         size_t len = ARR_LEN(path->path);
3291
3292         for (size_t i = 0; i < len; ++i) {
3293                 const type_path_entry_t *entry = & path->path[i];
3294
3295                 type_t *type = skip_typeref(entry->type);
3296                 if (is_type_compound(type)) {
3297                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3298                 } else if (is_type_array(type)) {
3299                         fprintf(stderr, "[%zu]", entry->index);
3300                 } else {
3301                         fprintf(stderr, "-INVALID-");
3302                 }
3303         }
3304         fprintf(stderr, "  (");
3305         print_type(path->top_type);
3306         fprintf(stderr, ")");
3307 }
3308
3309 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3310 {
3311         size_t len = ARR_LEN(path->path);
3312         assert(len > 0);
3313         return & path->path[len-1];
3314 }
3315
3316 static type_path_entry_t *append_to_type_path(type_path_t *path)
3317 {
3318         size_t len = ARR_LEN(path->path);
3319         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3320
3321         type_path_entry_t *result = & path->path[len];
3322         memset(result, 0, sizeof(result[0]));
3323         return result;
3324 }
3325
3326 static size_t get_compound_member_count(const compound_type_t *type)
3327 {
3328         compound_t *compound  = type->compound;
3329         size_t      n_members = 0;
3330         entity_t   *member    = compound->members.entities;
3331         for ( ; member != NULL; member = member->base.next) {
3332                 ++n_members;
3333         }
3334
3335         return n_members;
3336 }
3337
3338 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3339 {
3340         type_t *orig_top_type = path->top_type;
3341         type_t *top_type      = skip_typeref(orig_top_type);
3342
3343         assert(is_type_compound(top_type) || is_type_array(top_type));
3344
3345         if (ARR_LEN(path->path) == 0) {
3346                 return NULL;
3347         } else {
3348                 type_path_entry_t *top         = get_type_path_top(path);
3349                 ir_initializer_t  *initializer = top->initializer;
3350                 return get_initializer_compound_value(initializer, top->index);
3351         }
3352 }
3353
3354 static void descend_into_subtype(type_path_t *path)
3355 {
3356         type_t *orig_top_type = path->top_type;
3357         type_t *top_type      = skip_typeref(orig_top_type);
3358
3359         assert(is_type_compound(top_type) || is_type_array(top_type));
3360
3361         ir_initializer_t *initializer = get_initializer_entry(path);
3362
3363         type_path_entry_t *top = append_to_type_path(path);
3364         top->type              = top_type;
3365
3366         size_t len;
3367
3368         if (is_type_compound(top_type)) {
3369                 compound_t *compound = top_type->compound.compound;
3370                 entity_t   *entry    = compound->members.entities;
3371
3372                 top->compound_entry = entry;
3373                 top->index          = 0;
3374                 len                 = get_compound_member_count(&top_type->compound);
3375                 if (entry != NULL) {
3376                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3377                         path->top_type = entry->declaration.type;
3378                 }
3379         } else {
3380                 assert(is_type_array(top_type));
3381                 assert(top_type->array.size > 0);
3382
3383                 top->index     = 0;
3384                 path->top_type = top_type->array.element_type;
3385                 len            = top_type->array.size;
3386         }
3387         if (initializer == NULL
3388                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3389                 initializer = create_initializer_compound(len);
3390                 /* we have to set the entry at the 2nd latest path entry... */
3391                 size_t path_len = ARR_LEN(path->path);
3392                 assert(path_len >= 1);
3393                 if (path_len > 1) {
3394                         type_path_entry_t *entry        = & path->path[path_len-2];
3395                         ir_initializer_t  *tinitializer = entry->initializer;
3396                         set_initializer_compound_value(tinitializer, entry->index,
3397                                                        initializer);
3398                 }
3399         }
3400         top->initializer = initializer;
3401 }
3402
3403 static void ascend_from_subtype(type_path_t *path)
3404 {
3405         type_path_entry_t *top = get_type_path_top(path);
3406
3407         path->top_type = top->type;
3408
3409         size_t len = ARR_LEN(path->path);
3410         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3411 }
3412
3413 static void walk_designator(type_path_t *path, const designator_t *designator)
3414 {
3415         /* designators start at current object type */
3416         ARR_RESIZE(type_path_entry_t, path->path, 1);
3417
3418         for ( ; designator != NULL; designator = designator->next) {
3419                 type_path_entry_t *top         = get_type_path_top(path);
3420                 type_t            *orig_type   = top->type;
3421                 type_t            *type        = skip_typeref(orig_type);
3422
3423                 if (designator->symbol != NULL) {
3424                         assert(is_type_compound(type));
3425                         size_t    index  = 0;
3426                         symbol_t *symbol = designator->symbol;
3427
3428                         compound_t *compound = type->compound.compound;
3429                         entity_t   *iter     = compound->members.entities;
3430                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3431                                 if (iter->base.symbol == symbol) {
3432                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3433                                         break;
3434                                 }
3435                         }
3436                         assert(iter != NULL);
3437
3438                         top->type           = orig_type;
3439                         top->compound_entry = iter;
3440                         top->index          = index;
3441                         orig_type           = iter->declaration.type;
3442                 } else {
3443                         expression_t *array_index = designator->array_index;
3444                         assert(designator->array_index != NULL);
3445                         assert(is_type_array(type));
3446
3447                         long index = fold_constant(array_index);
3448                         assert(index >= 0);
3449 #ifndef NDEBUG
3450                         if (type->array.size_constant) {
3451                                 long array_size = type->array.size;
3452                                 assert(index < array_size);
3453                         }
3454 #endif
3455
3456                         top->type  = orig_type;
3457                         top->index = (size_t) index;
3458                         orig_type  = type->array.element_type;
3459                 }
3460                 path->top_type = orig_type;
3461
3462                 if (designator->next != NULL) {
3463                         descend_into_subtype(path);
3464                 }
3465         }
3466
3467         path->invalid  = false;
3468 }
3469
3470 static void advance_current_object(type_path_t *path)
3471 {
3472         if (path->invalid) {
3473                 /* TODO: handle this... */
3474                 panic("invalid initializer in ast2firm (excessive elements)");
3475                 return;
3476         }
3477
3478         type_path_entry_t *top = get_type_path_top(path);
3479
3480         type_t *type = skip_typeref(top->type);
3481         if (is_type_union(type)) {
3482                 top->compound_entry = NULL;
3483         } else if (is_type_struct(type)) {
3484                 entity_t *entry = top->compound_entry;
3485
3486                 top->index++;
3487                 entry               = entry->base.next;
3488                 top->compound_entry = entry;
3489                 if (entry != NULL) {
3490                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3491                         path->top_type = entry->declaration.type;
3492                         return;
3493                 }
3494         } else {
3495                 assert(is_type_array(type));
3496
3497                 top->index++;
3498                 if (!type->array.size_constant || top->index < type->array.size) {
3499                         return;
3500                 }
3501         }
3502
3503         /* we're past the last member of the current sub-aggregate, try if we
3504          * can ascend in the type hierarchy and continue with another subobject */
3505         size_t len = ARR_LEN(path->path);
3506
3507         if (len > 1) {
3508                 ascend_from_subtype(path);
3509                 advance_current_object(path);
3510         } else {
3511                 path->invalid = true;
3512         }
3513 }
3514
3515
3516 static ir_initializer_t *create_ir_initializer(
3517                 const initializer_t *initializer, type_t *type);
3518
3519 static ir_initializer_t *create_ir_initializer_value(
3520                 const initializer_value_t *initializer)
3521 {
3522         if (is_type_compound(initializer->value->base.type)) {
3523                 panic("initializer creation for compounds not implemented yet");
3524         }
3525         ir_node *value = expression_to_firm(initializer->value);
3526         return create_initializer_const(value);
3527 }
3528
3529 /** test wether type can be initialized by a string constant */
3530 static bool is_string_type(type_t *type)
3531 {
3532         type_t *inner;
3533         if (is_type_pointer(type)) {
3534                 inner = skip_typeref(type->pointer.points_to);
3535         } else if(is_type_array(type)) {
3536                 inner = skip_typeref(type->array.element_type);
3537         } else {
3538                 return false;
3539         }
3540
3541         return is_type_integer(inner);
3542 }
3543
3544 static ir_initializer_t *create_ir_initializer_list(
3545                 const initializer_list_t *initializer, type_t *type)
3546 {
3547         type_path_t path;
3548         memset(&path, 0, sizeof(path));
3549         path.top_type = type;
3550         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3551
3552         descend_into_subtype(&path);
3553
3554         for (size_t i = 0; i < initializer->len; ++i) {
3555                 const initializer_t *sub_initializer = initializer->initializers[i];
3556
3557                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3558                         walk_designator(&path, sub_initializer->designator.designator);
3559                         continue;
3560                 }
3561
3562                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3563                         /* we might have to descend into types until we're at a scalar
3564                          * type */
3565                         while(true) {
3566                                 type_t *orig_top_type = path.top_type;
3567                                 type_t *top_type      = skip_typeref(orig_top_type);
3568
3569                                 if (is_type_scalar(top_type))
3570                                         break;
3571                                 descend_into_subtype(&path);
3572                         }
3573                 } else if (sub_initializer->kind == INITIALIZER_STRING
3574                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3575                         /* we might have to descend into types until we're at a scalar
3576                          * type */
3577                         while (true) {
3578                                 type_t *orig_top_type = path.top_type;
3579                                 type_t *top_type      = skip_typeref(orig_top_type);
3580
3581                                 if (is_string_type(top_type))
3582                                         break;
3583                                 descend_into_subtype(&path);
3584                         }
3585                 }
3586
3587                 ir_initializer_t *sub_irinitializer
3588                         = create_ir_initializer(sub_initializer, path.top_type);
3589
3590                 size_t path_len = ARR_LEN(path.path);
3591                 assert(path_len >= 1);
3592                 type_path_entry_t *entry        = & path.path[path_len-1];
3593                 ir_initializer_t  *tinitializer = entry->initializer;
3594                 set_initializer_compound_value(tinitializer, entry->index,
3595                                                sub_irinitializer);
3596
3597                 advance_current_object(&path);
3598         }
3599
3600         assert(ARR_LEN(path.path) >= 1);
3601         ir_initializer_t *result = path.path[0].initializer;
3602         DEL_ARR_F(path.path);
3603
3604         return result;
3605 }
3606
3607 static ir_initializer_t *create_ir_initializer_string(
3608                 const initializer_string_t *initializer, type_t *type)
3609 {
3610         type = skip_typeref(type);
3611
3612         size_t            string_len    = initializer->string.size;
3613         assert(type->kind == TYPE_ARRAY);
3614         assert(type->array.size_constant);
3615         size_t            len           = type->array.size;
3616         ir_initializer_t *irinitializer = create_initializer_compound(len);
3617
3618         const char *string = initializer->string.begin;
3619         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3620
3621         for (size_t i = 0; i < len; ++i) {
3622                 char c = 0;
3623                 if (i < string_len)
3624                         c = string[i];
3625
3626                 tarval           *tv = new_tarval_from_long(c, mode);
3627                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3628
3629                 set_initializer_compound_value(irinitializer, i, char_initializer);
3630         }
3631
3632         return irinitializer;
3633 }
3634
3635 static ir_initializer_t *create_ir_initializer_wide_string(
3636                 const initializer_wide_string_t *initializer, type_t *type)
3637 {
3638         size_t            string_len    = initializer->string.size;
3639         assert(type->kind == TYPE_ARRAY);
3640         assert(type->array.size_constant);
3641         size_t            len           = type->array.size;
3642         ir_initializer_t *irinitializer = create_initializer_compound(len);
3643
3644         const wchar_rep_t *string = initializer->string.begin;
3645         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3646
3647         for (size_t i = 0; i < len; ++i) {
3648                 wchar_rep_t c = 0;
3649                 if (i < string_len) {
3650                         c = string[i];
3651                 }
3652                 tarval *tv = new_tarval_from_long(c, mode);
3653                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3654
3655                 set_initializer_compound_value(irinitializer, i, char_initializer);
3656         }
3657
3658         return irinitializer;
3659 }
3660
3661 static ir_initializer_t *create_ir_initializer(
3662                 const initializer_t *initializer, type_t *type)
3663 {
3664         switch(initializer->kind) {
3665                 case INITIALIZER_STRING:
3666                         return create_ir_initializer_string(&initializer->string, type);
3667
3668                 case INITIALIZER_WIDE_STRING:
3669                         return create_ir_initializer_wide_string(&initializer->wide_string,
3670                                                                  type);
3671
3672                 case INITIALIZER_LIST:
3673                         return create_ir_initializer_list(&initializer->list, type);
3674
3675                 case INITIALIZER_VALUE:
3676                         return create_ir_initializer_value(&initializer->value);
3677
3678                 case INITIALIZER_DESIGNATOR:
3679                         panic("unexpected designator initializer found");
3680         }
3681         panic("unknown initializer");
3682 }
3683
3684 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3685                 ir_node *base_addr)
3686 {
3687         if (is_atomic_type(type)) {
3688                 ir_mode *mode = get_type_mode(type);
3689                 tarval  *zero = get_mode_null(mode);
3690                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3691
3692                 /* TODO: bitfields */
3693                 ir_node *mem    = get_store();
3694                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3695                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3696                 set_store(proj_m);
3697         } else {
3698                 assert(is_compound_type(type));
3699
3700                 int n_members;
3701                 if (is_Array_type(type)) {
3702                         assert(has_array_upper_bound(type, 0));
3703                         n_members = get_array_upper_bound_int(type, 0);
3704                 } else {
3705                         n_members = get_compound_n_members(type);
3706                 }
3707
3708                 for (int i = 0; i < n_members; ++i) {
3709                         ir_node *addr;
3710                         ir_type *irtype;
3711                         if (is_Array_type(type)) {
3712                                 ir_entity *entity   = get_array_element_entity(type);
3713                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3714                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3715                                 ir_node   *in[1]    = { cnst };
3716                                 irtype = get_array_element_type(type);
3717                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3718                         } else {
3719                                 ir_entity *member = get_compound_member(type, i);
3720
3721                                 irtype = get_entity_type(member);
3722                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3723                         }
3724
3725                         create_dynamic_null_initializer(irtype, dbgi, addr);
3726                 }
3727         }
3728 }
3729
3730 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3731                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3732 {
3733         switch(get_initializer_kind(initializer)) {
3734         case IR_INITIALIZER_NULL: {
3735                 create_dynamic_null_initializer(type, dbgi, base_addr);
3736                 return;
3737         }
3738         case IR_INITIALIZER_CONST: {
3739                 ir_node *node     = get_initializer_const_value(initializer);
3740                 ir_mode *mode     = get_irn_mode(node);
3741                 ir_type *ent_type = get_entity_type(entity);
3742
3743                 /* is it a bitfield type? */
3744                 if (is_Primitive_type(ent_type) &&
3745                                 get_primitive_base_type(ent_type) != NULL) {
3746                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3747                         return;
3748                 }
3749
3750                 assert(get_type_mode(type) == mode);
3751                 ir_node *mem    = get_store();
3752                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3753                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3754                 set_store(proj_m);
3755                 return;
3756         }
3757         case IR_INITIALIZER_TARVAL: {
3758                 tarval  *tv       = get_initializer_tarval_value(initializer);
3759                 ir_mode *mode     = get_tarval_mode(tv);
3760                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3761                 ir_type *ent_type = get_entity_type(entity);
3762
3763                 /* is it a bitfield type? */
3764                 if (is_Primitive_type(ent_type) &&
3765                                 get_primitive_base_type(ent_type) != NULL) {
3766                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3767                         return;
3768                 }
3769
3770                 assert(get_type_mode(type) == mode);
3771                 ir_node *mem    = get_store();
3772                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3773                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3774                 set_store(proj_m);
3775                 return;
3776         }
3777         case IR_INITIALIZER_COMPOUND: {
3778                 assert(is_compound_type(type));
3779                 int n_members;
3780                 if (is_Array_type(type)) {
3781                         assert(has_array_upper_bound(type, 0));
3782                         n_members = get_array_upper_bound_int(type, 0);
3783                 } else {
3784                         n_members = get_compound_n_members(type);
3785                 }
3786
3787                 if (get_initializer_compound_n_entries(initializer)
3788                                 != (unsigned) n_members)
3789                         panic("initializer doesn't match compound type");
3790
3791                 for (int i = 0; i < n_members; ++i) {
3792                         ir_node   *addr;
3793                         ir_type   *irtype;
3794                         ir_entity *sub_entity;
3795                         if (is_Array_type(type)) {
3796                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3797                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3798                                 ir_node   *in[1]    = { cnst };
3799                                 irtype     = get_array_element_type(type);
3800                                 sub_entity = get_array_element_entity(type);
3801                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3802                                                        sub_entity);
3803                         } else {
3804                                 sub_entity = get_compound_member(type, i);
3805                                 irtype     = get_entity_type(sub_entity);
3806                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3807                                                              sub_entity);
3808                         }
3809
3810                         ir_initializer_t *sub_init
3811                                 = get_initializer_compound_value(initializer, i);
3812
3813                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3814                                                        addr);
3815                 }
3816                 return;
3817         }
3818         }
3819
3820         panic("invalid IR_INITIALIZER found");
3821 }
3822
3823 static void create_dynamic_initializer(ir_initializer_t *initializer,
3824                 dbg_info *dbgi, ir_entity *entity)
3825 {
3826         ir_node *frame     = get_local_frame(entity);
3827         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3828         ir_type *type      = get_entity_type(entity);
3829
3830         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3831 }
3832
3833 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3834                                      ir_entity *entity, type_t *type)
3835 {
3836         ir_node *memory = get_store();
3837         ir_node *nomem  = new_NoMem();
3838         ir_node *frame  = get_irg_frame(current_ir_graph);
3839         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3840
3841         if (initializer->kind == INITIALIZER_VALUE) {
3842                 initializer_value_t *initializer_value = &initializer->value;
3843
3844                 ir_node *value = expression_to_firm(initializer_value->value);
3845                 type = skip_typeref(type);
3846                 assign_value(dbgi, addr, type, value);
3847                 return;
3848         }
3849
3850         if (!is_constant_initializer(initializer)) {
3851                 ir_initializer_t *irinitializer
3852                         = create_ir_initializer(initializer, type);
3853
3854                 create_dynamic_initializer(irinitializer, dbgi, entity);
3855                 return;
3856         }
3857
3858         /* create the ir_initializer */
3859         ir_graph *const old_current_ir_graph = current_ir_graph;
3860         current_ir_graph = get_const_code_irg();
3861
3862         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3863
3864         assert(current_ir_graph == get_const_code_irg());
3865         current_ir_graph = old_current_ir_graph;
3866
3867         /* create a "template" entity which is copied to the entity on the stack */
3868         ident     *const id          = id_unique("initializer.%u");
3869         ir_type   *const irtype      = get_ir_type(type);
3870         ir_type   *const global_type = get_glob_type();
3871         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3872         set_entity_ld_ident(init_entity, id);
3873
3874         set_entity_variability(init_entity, variability_initialized);
3875         set_entity_visibility(init_entity, visibility_local);
3876         set_entity_allocation(init_entity, allocation_static);
3877
3878         set_entity_initializer(init_entity, irinitializer);
3879
3880         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3881         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3882
3883         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3884         set_store(copyb_mem);
3885 }
3886
3887 static void create_initializer_local_variable_entity(entity_t *entity)
3888 {
3889         assert(entity->kind == ENTITY_VARIABLE);
3890         initializer_t *initializer = entity->variable.initializer;
3891         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3892         ir_entity     *irentity    = entity->variable.v.entity;
3893         type_t        *type        = entity->declaration.type;
3894         create_local_initializer(initializer, dbgi, irentity, type);
3895 }
3896
3897 static void create_variable_initializer(entity_t *entity)
3898 {
3899         assert(entity->kind == ENTITY_VARIABLE);
3900         initializer_t *initializer = entity->variable.initializer;
3901         if (initializer == NULL)
3902                 return;
3903
3904         declaration_kind_t declaration_kind
3905                 = (declaration_kind_t) entity->declaration.kind;
3906         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3907                 create_initializer_local_variable_entity(entity);
3908                 return;
3909         }
3910
3911         type_t            *type = entity->declaration.type;
3912         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3913
3914         if (initializer->kind == INITIALIZER_VALUE) {
3915                 initializer_value_t *initializer_value = &initializer->value;
3916                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3917
3918                 ir_node *value = expression_to_firm(initializer_value->value);
3919                 value = do_strict_conv(dbgi, value);
3920
3921                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3922                         set_value(entity->variable.v.value_number, value);
3923                 } else {
3924                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3925
3926                         ir_entity *irentity = entity->variable.v.entity;
3927
3928                         if (tq & TYPE_QUALIFIER_CONST) {
3929                                 set_entity_variability(irentity, variability_constant);
3930                         } else {
3931                                 set_entity_variability(irentity, variability_initialized);
3932                         }
3933                         set_atomic_ent_value(irentity, value);
3934                 }
3935         } else {
3936                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3937                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3938
3939                 ir_entity        *irentity        = entity->variable.v.entity;
3940                 ir_initializer_t *irinitializer
3941                         = create_ir_initializer(initializer, type);
3942
3943                 if (tq & TYPE_QUALIFIER_CONST) {
3944                         set_entity_variability(irentity, variability_constant);
3945                 } else {
3946                         set_entity_variability(irentity, variability_initialized);
3947                 }
3948                 set_entity_initializer(irentity, irinitializer);
3949         }
3950 }
3951
3952 static void create_variable_length_array(entity_t *entity)
3953 {
3954         assert(entity->kind == ENTITY_VARIABLE);
3955         assert(entity->variable.initializer == NULL);
3956
3957         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3958         entity->variable.v.vla_base = NULL;
3959
3960         /* TODO: record VLA somewhere so we create the free node when we leave
3961          * it's scope */
3962 }
3963
3964 static void allocate_variable_length_array(entity_t *entity)
3965 {
3966         assert(entity->kind == ENTITY_VARIABLE);
3967         assert(entity->variable.initializer == NULL);
3968         assert(get_cur_block() != NULL);
3969
3970         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3971         type_t   *type      = entity->declaration.type;
3972         ir_type  *el_type   = get_ir_type(type->array.element_type);
3973
3974         /* make sure size_node is calculated */
3975         get_type_size(type);
3976         ir_node  *elems = type->array.size_node;
3977         ir_node  *mem   = get_store();
3978         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3979
3980         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3981         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3982         set_store(proj_m);
3983
3984         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3985         entity->variable.v.vla_base = addr;
3986 }
3987
3988 /**
3989  * Creates a Firm local variable from a declaration.
3990  */
3991 static void create_local_variable(entity_t *entity)
3992 {
3993         assert(entity->kind == ENTITY_VARIABLE);
3994         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3995
3996         bool needs_entity = entity->variable.address_taken;
3997         type_t *type = skip_typeref(entity->declaration.type);
3998
3999         /* is it a variable length array? */
4000         if (is_type_array(type) && !type->array.size_constant) {
4001                 create_variable_length_array(entity);
4002                 return;
4003         } else if (is_type_array(type) || is_type_compound(type)) {
4004                 needs_entity = true;
4005         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4006                 needs_entity = true;
4007         }
4008
4009         if (needs_entity) {
4010                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4011                 create_variable_entity(entity,
4012                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4013                                        frame_type);
4014         } else {
4015                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4016                 entity->variable.v.value_number = next_value_number_function;
4017                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4018                                         (variable_t*) &entity->variable);
4019                 ++next_value_number_function;
4020         }
4021 }
4022
4023 static void create_local_static_variable(entity_t *entity)
4024 {
4025         assert(entity->kind == ENTITY_VARIABLE);
4026         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4027
4028         type_t    *const type        = skip_typeref(entity->declaration.type);
4029         ir_type   *const global_type = get_glob_type();
4030         ir_type   *const irtype      = get_ir_type(type);
4031         dbg_info  *const dbgi        = get_dbg_info(&entity->base.source_position);
4032
4033         size_t l = strlen(entity->base.symbol->string);
4034         char   buf[l + sizeof(".%u")];
4035         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4036         ident     *const id = id_unique(buf);
4037
4038         ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4039
4040         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4041                 set_entity_volatility(irentity, volatility_is_volatile);
4042         }
4043
4044         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4045         entity->variable.v.entity = irentity;
4046         set_entity_ld_ident(irentity, id);
4047         set_entity_variability(irentity, variability_uninitialized);
4048         set_entity_visibility(irentity, visibility_local);
4049         set_entity_allocation(irentity, allocation_static);
4050
4051         ir_graph *const old_current_ir_graph = current_ir_graph;
4052         current_ir_graph = get_const_code_irg();
4053
4054         create_variable_initializer(entity);
4055
4056         assert(current_ir_graph == get_const_code_irg());
4057         current_ir_graph = old_current_ir_graph;
4058 }
4059
4060
4061
4062 static void return_statement_to_firm(return_statement_t *statement)
4063 {
4064         if (get_cur_block() == NULL)
4065                 return;
4066
4067         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4068         type_t   *type        = current_function_entity->declaration.type;
4069         ir_type  *func_irtype = get_ir_type(type);
4070
4071
4072         ir_node *in[1];
4073         int      in_len;
4074         if (get_method_n_ress(func_irtype) > 0) {
4075                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4076
4077                 if (statement->value != NULL) {
4078                         ir_node *node = expression_to_firm(statement->value);
4079                         node  = do_strict_conv(dbgi, node);
4080                         in[0] = node;
4081                 } else {
4082                         ir_mode *mode;
4083                         if (is_compound_type(res_type)) {
4084                                 mode = mode_P_data;
4085                         } else {
4086                                 mode = get_type_mode(res_type);
4087                         }
4088                         in[0] = new_Unknown(mode);
4089                 }
4090                 in_len = 1;
4091         } else {
4092                 /* build return_value for its side effects */
4093                 if (statement->value != NULL) {
4094                         expression_to_firm(statement->value);
4095                 }
4096                 in_len = 0;
4097         }
4098
4099         ir_node  *store = get_store();
4100         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4101
4102         ir_node *end_block = get_irg_end_block(current_ir_graph);
4103         add_immBlock_pred(end_block, ret);
4104
4105         set_cur_block(NULL);
4106 }
4107
4108 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4109 {
4110         if (get_cur_block() == NULL)
4111                 return NULL;
4112
4113         return expression_to_firm(statement->expression);
4114 }
4115
4116 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4117 {
4118         entity_t *entity = compound->scope.entities;
4119         for ( ; entity != NULL; entity = entity->base.next) {
4120                 if (!is_declaration(entity))
4121                         continue;
4122
4123                 create_local_declaration(entity);
4124         }
4125
4126         ir_node     *result    = NULL;
4127         statement_t *statement = compound->statements;
4128         for ( ; statement != NULL; statement = statement->base.next) {
4129                 if (statement->base.next == NULL
4130                                 && statement->kind == STATEMENT_EXPRESSION) {
4131                         result = expression_statement_to_firm(
4132                                         &statement->expression);
4133                         break;
4134                 }
4135                 statement_to_firm(statement);
4136         }
4137
4138         return result;
4139 }
4140
4141 static void create_global_variable(entity_t *entity)
4142 {
4143         assert(entity->kind == ENTITY_VARIABLE);
4144
4145         ir_visibility  vis;
4146         ir_type       *var_type;
4147         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4148                 case STORAGE_CLASS_STATIC:
4149                         vis = visibility_local;
4150                         goto global_var;
4151
4152                 case STORAGE_CLASS_EXTERN:
4153                         vis = visibility_external_allocated;
4154                         goto global_var;
4155
4156                 case STORAGE_CLASS_NONE:
4157                         vis = visibility_external_visible;
4158                         goto global_var;
4159
4160                 case STORAGE_CLASS_THREAD:
4161                         vis = visibility_external_visible;
4162                         goto tls_var;
4163
4164                 case STORAGE_CLASS_THREAD_EXTERN:
4165                         vis = visibility_external_allocated;
4166                         goto tls_var;
4167
4168                 case STORAGE_CLASS_THREAD_STATIC:
4169                         vis = visibility_local;
4170                         goto tls_var;
4171
4172 tls_var:
4173                         var_type = get_tls_type();
4174                         goto create_var;
4175
4176 global_var:
4177                         var_type = get_glob_type();
4178                         goto create_var;
4179
4180 create_var:
4181                         create_variable_entity(entity,
4182                                                DECLARATION_KIND_GLOBAL_VARIABLE,
4183                                                var_type);
4184                         /* Matze: I'm confused, shouldn't we only be here when creating
4185                          * variables? */
4186 #if 0
4187                         if (!is_type_function(skip_typeref(entity->declaration.type))) {
4188                                 set_entity_visibility(declaration->v.entity, vis);
4189                         }
4190 #else
4191                         set_entity_visibility(entity->variable.v.entity, vis);
4192 #endif
4193
4194                         return;
4195
4196                 case STORAGE_CLASS_TYPEDEF:
4197                 case STORAGE_CLASS_AUTO:
4198                 case STORAGE_CLASS_REGISTER:
4199                         break;
4200         }
4201         panic("Invalid storage class for global variable");
4202 }
4203
4204 static void create_local_declaration(entity_t *entity)
4205 {
4206         assert(is_declaration(entity));
4207
4208         /* construct type */
4209         (void) get_ir_type(entity->declaration.type);
4210         if (entity->base.symbol == NULL) {
4211                 return;
4212         }
4213
4214         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4215         case STORAGE_CLASS_STATIC:
4216                 create_local_static_variable(entity);
4217                 return;
4218         case STORAGE_CLASS_EXTERN:
4219                 if (entity->kind == ENTITY_FUNCTION) {
4220                         assert(entity->function.statement == NULL);
4221                         get_function_entity(entity);
4222                 } else {
4223                         create_global_variable(entity);
4224                         create_variable_initializer(entity);
4225                 }
4226                 return;
4227         case STORAGE_CLASS_NONE:
4228         case STORAGE_CLASS_AUTO:
4229         case STORAGE_CLASS_REGISTER:
4230                 if (entity->kind == ENTITY_FUNCTION) {
4231                         if (entity->function.statement != NULL) {
4232                                 get_function_entity(entity);
4233                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4234                                 enqueue_inner_function(entity);
4235                         } else {
4236                                 get_function_entity(entity);
4237                         }
4238                 } else {
4239                         create_local_variable(entity);
4240                 }
4241                 return;
4242         case STORAGE_CLASS_TYPEDEF:
4243         case STORAGE_CLASS_THREAD:
4244         case STORAGE_CLASS_THREAD_EXTERN:
4245         case STORAGE_CLASS_THREAD_STATIC:
4246                 break;
4247         }
4248         panic("invalid storage class found");
4249 }
4250
4251 static void initialize_local_declaration(entity_t *entity)
4252 {
4253         if (entity->base.symbol == NULL)
4254                 return;
4255
4256         switch ((declaration_kind_t) entity->declaration.kind) {
4257         case DECLARATION_KIND_LOCAL_VARIABLE:
4258         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4259                 create_variable_initializer(entity);
4260                 return;
4261
4262         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4263                 allocate_variable_length_array(entity);
4264                 return;
4265
4266         case DECLARATION_KIND_COMPOUND_MEMBER:
4267         case DECLARATION_KIND_GLOBAL_VARIABLE:
4268         case DECLARATION_KIND_FUNCTION:
4269         case DECLARATION_KIND_INNER_FUNCTION:
4270                 return;
4271
4272         case DECLARATION_KIND_UNKNOWN:
4273                 panic("can't initialize unknown declaration");
4274         }
4275         panic("invalid declaration kind");
4276 }
4277
4278 static void declaration_statement_to_firm(declaration_statement_t *statement)
4279 {
4280         entity_t *entity = statement->declarations_begin;
4281         entity_t *end    = statement->declarations_end->base.next;
4282         for ( ; entity != end; entity = entity->base.next) {
4283                 if (!is_declaration(entity))
4284                         continue;
4285                 initialize_local_declaration(entity);
4286         }
4287 }
4288
4289 static void if_statement_to_firm(if_statement_t *statement)
4290 {
4291         ir_node *cur_block = get_cur_block();
4292
4293         ir_node *fallthrough_block = NULL;
4294
4295         /* the true (blocks) */
4296         ir_node *true_block = NULL;
4297         if (statement->true_statement != NULL) {
4298                 true_block = new_immBlock();
4299                 statement_to_firm(statement->true_statement);
4300                 if (get_cur_block() != NULL) {
4301                         ir_node *jmp = new_Jmp();
4302                         if (fallthrough_block == NULL)
4303                                 fallthrough_block = new_immBlock();
4304                         add_immBlock_pred(fallthrough_block, jmp);
4305                 }
4306         }
4307
4308         /* the false (blocks) */
4309         ir_node *false_block = NULL;
4310         if (statement->false_statement != NULL) {
4311                 false_block = new_immBlock();
4312
4313                 statement_to_firm(statement->false_statement);
4314                 if (get_cur_block() != NULL) {
4315                         ir_node *jmp = new_Jmp();
4316                         if (fallthrough_block == NULL)
4317                                 fallthrough_block = new_immBlock();
4318                         add_immBlock_pred(fallthrough_block, jmp);
4319                 }
4320         }
4321
4322         /* create the condition */
4323         if (cur_block != NULL) {
4324                 if (true_block == NULL || false_block == NULL) {
4325                         if (fallthrough_block == NULL)
4326                                 fallthrough_block = new_immBlock();
4327                         if (true_block == NULL)
4328                                 true_block = fallthrough_block;
4329                         if (false_block == NULL)
4330                                 false_block = fallthrough_block;
4331                 }
4332
4333                 set_cur_block(cur_block);
4334                 create_condition_evaluation(statement->condition, true_block,
4335                                             false_block);
4336         }
4337
4338         mature_immBlock(true_block);
4339         if (false_block != fallthrough_block && false_block != NULL) {
4340                 mature_immBlock(false_block);
4341         }
4342         if (fallthrough_block != NULL) {
4343                 mature_immBlock(fallthrough_block);
4344         }
4345
4346         set_cur_block(fallthrough_block);
4347 }
4348
4349 static void while_statement_to_firm(while_statement_t *statement)
4350 {
4351         ir_node *jmp = NULL;
4352         if (get_cur_block() != NULL) {
4353                 jmp = new_Jmp();
4354         }
4355
4356         /* create the header block */
4357         ir_node *header_block = new_immBlock();
4358         if (jmp != NULL) {
4359                 add_immBlock_pred(header_block, jmp);
4360         }
4361
4362         /* the loop body */
4363         ir_node *old_continue_label = continue_label;
4364         ir_node *old_break_label    = break_label;
4365         continue_label              = header_block;
4366         break_label                 = NULL;
4367
4368         ir_node *body_block = new_immBlock();
4369         statement_to_firm(statement->body);
4370         ir_node *false_block = break_label;
4371
4372         assert(continue_label == header_block);
4373         continue_label = old_continue_label;
4374         break_label    = old_break_label;
4375
4376         if (get_cur_block() != NULL) {
4377                 jmp = new_Jmp();
4378                 add_immBlock_pred(header_block, jmp);
4379         }
4380
4381         /* shortcut for while(true) */
4382         if (is_constant_expression(statement->condition)
4383                         && fold_constant(statement->condition) != 0) {
4384                 set_cur_block(header_block);
4385                 ir_node *header_jmp = new_Jmp();
4386                 add_immBlock_pred(body_block, header_jmp);
4387
4388                 keep_alive(body_block);
4389                 keep_all_memory(body_block);
4390                 set_cur_block(body_block);
4391         } else {
4392                 if (false_block == NULL) {
4393                         false_block = new_immBlock();
4394                 }
4395
4396                 /* create the condition */
4397                 set_cur_block(header_block);
4398
4399                 create_condition_evaluation(statement->condition, body_block,
4400                                             false_block);
4401         }
4402
4403         mature_immBlock(body_block);
4404         mature_immBlock(header_block);
4405         if (false_block != NULL) {
4406                 mature_immBlock(false_block);
4407         }
4408
4409         set_cur_block(false_block);
4410 }
4411
4412 static void do_while_statement_to_firm(do_while_statement_t *statement)
4413 {
4414         ir_node *jmp = NULL;
4415         if (get_cur_block() != NULL) {
4416                 jmp = new_Jmp();
4417         }
4418
4419         /* create the header block */
4420         ir_node *header_block = new_immBlock();
4421
4422         /* the loop body */
4423         ir_node *body_block = new_immBlock();
4424         if (jmp != NULL) {
4425                 add_immBlock_pred(body_block, jmp);
4426         }
4427
4428         ir_node *old_continue_label = continue_label;
4429         ir_node *old_break_label    = break_label;
4430         continue_label              = header_block;
4431         break_label                 = NULL;
4432
4433         statement_to_firm(statement->body);
4434         ir_node *false_block = break_label;
4435
4436         assert(continue_label == header_block);
4437         continue_label = old_continue_label;
4438         break_label    = old_break_label;
4439
4440         if (get_cur_block() != NULL) {
4441                 ir_node *body_jmp = new_Jmp();
4442                 add_immBlock_pred(header_block, body_jmp);
4443                 mature_immBlock(header_block);
4444         }
4445
4446         if (false_block == NULL) {
4447                 false_block = new_immBlock();
4448         }
4449
4450         /* create the condition */
4451         set_cur_block(header_block);
4452
4453         create_condition_evaluation(statement->condition, body_block, false_block);
4454         mature_immBlock(body_block);
4455         mature_immBlock(header_block);
4456         if (false_block != NULL) {
4457                 mature_immBlock(false_block);
4458         }
4459
4460         set_cur_block(false_block);
4461 }
4462
4463 static void for_statement_to_firm(for_statement_t *statement)
4464 {
4465         ir_node *jmp = NULL;
4466
4467         /* create declarations */
4468         entity_t *entity = statement->scope.entities;
4469         for ( ; entity != NULL; entity = entity->base.next) {
4470                 if (!is_declaration(entity))
4471                         continue;
4472
4473                 create_local_declaration(entity);
4474         }
4475
4476         if (get_cur_block() != NULL) {
4477                 entity = statement->scope.entities;
4478                 for ( ; entity != NULL; entity = entity->base.next) {
4479                         if (!is_declaration(entity))
4480                                 continue;
4481
4482                         initialize_local_declaration(entity);
4483                 }
4484
4485                 if (statement->initialisation != NULL) {
4486                         expression_to_firm(statement->initialisation);
4487                 }
4488
4489                 jmp = new_Jmp();
4490         }
4491
4492
4493         /* create the step block */
4494         ir_node *const step_block = new_immBlock();
4495         if (statement->step != NULL) {
4496                 expression_to_firm(statement->step);
4497         }
4498         ir_node *const step_jmp = new_Jmp();
4499
4500         /* create the header block */
4501         ir_node *const header_block = new_immBlock();
4502         if (jmp != NULL) {
4503                 add_immBlock_pred(header_block, jmp);
4504         }
4505         add_immBlock_pred(header_block, step_jmp);
4506
4507         /* the false block */
4508         ir_node *const false_block = new_immBlock();
4509
4510         /* the loop body */
4511         ir_node * body_block;
4512         if (statement->body != NULL) {
4513                 ir_node *const old_continue_label = continue_label;
4514                 ir_node *const old_break_label    = break_label;
4515                 continue_label = step_block;
4516                 break_label    = false_block;
4517
4518                 body_block = new_immBlock();
4519                 statement_to_firm(statement->body);
4520
4521                 assert(continue_label == step_block);
4522                 assert(break_label    == false_block);
4523                 continue_label = old_continue_label;
4524                 break_label    = old_break_label;
4525
4526                 if (get_cur_block() != NULL) {
4527                         jmp = new_Jmp();
4528                         add_immBlock_pred(step_block, jmp);
4529                 }
4530         } else {
4531                 body_block = step_block;
4532         }
4533
4534         /* create the condition */
4535         set_cur_block(header_block);
4536         if (statement->condition != NULL) {
4537                 create_condition_evaluation(statement->condition, body_block,
4538                                             false_block);
4539         } else {
4540                 keep_alive(header_block);
4541                 keep_all_memory(header_block);
4542                 jmp = new_Jmp();
4543                 add_immBlock_pred(body_block, jmp);
4544         }
4545
4546         mature_immBlock(body_block);
4547         mature_immBlock(false_block);
4548         mature_immBlock(step_block);
4549         mature_immBlock(header_block);
4550         mature_immBlock(false_block);
4551
4552         set_cur_block(false_block);
4553 }
4554
4555 static void create_jump_statement(const statement_t *statement,
4556                                   ir_node *target_block)
4557 {
4558         if (get_cur_block() == NULL)
4559                 return;
4560
4561         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4562         ir_node  *jump = new_d_Jmp(dbgi);
4563         add_immBlock_pred(target_block, jump);
4564
4565         set_cur_block(NULL);
4566 }
4567
4568 static ir_node *get_break_label(void)
4569 {
4570         if (break_label == NULL) {
4571                 ir_node *cur_block = get_cur_block();
4572                 break_label = new_immBlock();
4573                 set_cur_block(cur_block);
4574         }
4575         return break_label;
4576 }
4577
4578 static void switch_statement_to_firm(switch_statement_t *statement)
4579 {
4580         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4581
4582         ir_node *expression  = expression_to_firm(statement->expression);
4583         ir_node *cond        = new_d_Cond(dbgi, expression);
4584
4585         set_cur_block(NULL);
4586
4587         ir_node *const old_switch_cond       = current_switch_cond;
4588         ir_node *const old_break_label       = break_label;
4589         const bool     old_saw_default_label = saw_default_label;
4590         saw_default_label                    = false;
4591         current_switch_cond                  = cond;
4592         break_label                          = NULL;
4593         switch_statement_t *const old_switch = current_switch;
4594         current_switch                       = statement;
4595
4596         /* determine a free number for the default label */
4597         unsigned long num_cases = 0;
4598         long def_nr = 0;
4599         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4600                 if (l->expression == NULL) {
4601                         /* default case */
4602                         continue;
4603                 }
4604                 if (l->last_case >= l->first_case)
4605                         num_cases += l->last_case - l->first_case + 1;
4606                 if (l->last_case > def_nr)
4607                         def_nr = l->last_case;
4608         }
4609
4610         if (def_nr == INT_MAX) {
4611                 /* Bad: an overflow will occurr, we cannot be sure that the
4612                  * maximum + 1 is a free number. Scan the values a second
4613                  * time to find a free number.
4614                  */
4615                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4616
4617                 memset(bits, 0, (num_cases + 7) >> 3);
4618                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4619                         if (l->expression == NULL) {
4620                                 /* default case */
4621                                 continue;
4622                         }
4623                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4624                         if (start < num_cases && l->last_case >= 0) {
4625                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4626                                         (unsigned long)l->last_case : num_cases - 1;
4627                                 for (unsigned long cns = start; cns <= end; ++cns) {
4628                                         bits[cns >> 3] |= (1 << (cns & 7));
4629                                 }
4630                         }
4631                 }
4632                 /* We look at the first num_cases constants:
4633                  * Either they are densed, so we took the last (num_cases)
4634                  * one, or they are non densed, so we will find one free
4635                  * there...
4636                  */
4637                 unsigned long i;
4638                 for (i = 0; i < num_cases; ++i)
4639                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4640                                 break;
4641
4642                 free(bits);
4643                 def_nr = i;
4644         } else {
4645                 ++def_nr;
4646         }
4647         statement->default_proj_nr = def_nr;
4648
4649         if (statement->body != NULL) {
4650                 statement_to_firm(statement->body);
4651         }
4652
4653         if (get_cur_block() != NULL) {
4654                 ir_node *jmp = new_Jmp();
4655                 add_immBlock_pred(get_break_label(), jmp);
4656         }
4657
4658         if (!saw_default_label) {
4659                 set_cur_block(get_nodes_block(cond));
4660                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4661                                                         statement->default_proj_nr);
4662                 add_immBlock_pred(get_break_label(), proj);
4663         }
4664
4665         if (break_label != NULL) {
4666                 mature_immBlock(break_label);
4667         }
4668         set_cur_block(break_label);
4669
4670         assert(current_switch_cond == cond);
4671         current_switch      = old_switch;
4672         current_switch_cond = old_switch_cond;
4673         break_label         = old_break_label;
4674         saw_default_label   = old_saw_default_label;
4675 }
4676
4677 static void case_label_to_firm(const case_label_statement_t *statement)
4678 {
4679         if (statement->is_empty_range)
4680                 return;
4681
4682         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4683
4684         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4685
4686         ir_node *proj;
4687         ir_node *old_block = get_nodes_block(current_switch_cond);
4688         ir_node *block     = new_immBlock();
4689
4690         set_cur_block(old_block);
4691         if (statement->expression != NULL) {
4692                 long pn     = statement->first_case;
4693                 long end_pn = statement->last_case;
4694                 assert(pn <= end_pn);
4695                 /* create jumps for all cases in the given range */
4696                 do {
4697                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4698                         add_immBlock_pred(block, proj);
4699                 } while(pn++ < end_pn);
4700         } else {
4701                 saw_default_label = true;
4702                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4703                                          current_switch->default_proj_nr);
4704
4705                 add_immBlock_pred(block, proj);
4706         }
4707
4708         if (fallthrough != NULL) {
4709                 add_immBlock_pred(block, fallthrough);
4710         }
4711         mature_immBlock(block);
4712         set_cur_block(block);
4713
4714         if (statement->statement != NULL) {
4715                 statement_to_firm(statement->statement);
4716         }
4717 }
4718
4719 static void label_to_firm(const label_statement_t *statement)
4720 {
4721         ir_node *block = get_label_block(statement->label);
4722
4723         if (get_cur_block() != NULL) {
4724                 ir_node *jmp = new_Jmp();
4725                 add_immBlock_pred(block, jmp);
4726         }
4727
4728         set_cur_block(block);
4729         keep_alive(block);
4730         keep_all_memory(block);
4731
4732         if (statement->statement != NULL) {
4733                 statement_to_firm(statement->statement);
4734         }
4735 }
4736
4737 static void goto_to_firm(const goto_statement_t *statement)
4738 {
4739         if (get_cur_block() == NULL)
4740                 return;
4741
4742         if (statement->expression) {
4743                 ir_node  *irn  = expression_to_firm(statement->expression);
4744                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4745                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4746
4747                 set_irn_link(ijmp, ijmp_list);
4748                 ijmp_list = ijmp;
4749         } else {
4750                 ir_node *block = get_label_block(statement->label);
4751                 ir_node *jmp   = new_Jmp();
4752                 add_immBlock_pred(block, jmp);
4753         }
4754         set_cur_block(NULL);
4755 }
4756
4757 static void asm_statement_to_firm(const asm_statement_t *statement)
4758 {
4759         bool needs_memory = false;
4760
4761         if (statement->is_volatile) {
4762                 needs_memory = true;
4763         }
4764
4765         size_t         n_clobbers = 0;
4766         asm_clobber_t *clobber    = statement->clobbers;
4767         for ( ; clobber != NULL; clobber = clobber->next) {
4768                 const char *clobber_str = clobber->clobber.begin;
4769
4770                 if (!be_is_valid_clobber(clobber_str)) {
4771                         errorf(&statement->base.source_position,
4772                                    "invalid clobber '%s' specified", clobber->clobber);
4773                         continue;
4774                 }
4775
4776                 if (strcmp(clobber_str, "memory") == 0) {
4777                         needs_memory = true;
4778                         continue;
4779                 }
4780
4781                 ident *id = new_id_from_str(clobber_str);
4782                 obstack_ptr_grow(&asm_obst, id);
4783                 ++n_clobbers;
4784         }
4785         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4786         ident **clobbers = NULL;
4787         if (n_clobbers > 0) {
4788                 clobbers = obstack_finish(&asm_obst);
4789         }
4790
4791         size_t n_inputs  = 0;
4792         asm_argument_t *argument = statement->inputs;
4793         for ( ; argument != NULL; argument = argument->next)
4794                 n_inputs++;
4795         size_t n_outputs = 0;
4796         argument = statement->outputs;
4797         for ( ; argument != NULL; argument = argument->next)
4798                 n_outputs++;
4799
4800         unsigned next_pos = 0;
4801
4802         ir_node *ins[n_inputs + n_outputs + 1];
4803         size_t   in_size = 0;
4804
4805         ir_asm_constraint tmp_in_constraints[n_outputs];
4806
4807         const expression_t *out_exprs[n_outputs];
4808         ir_node            *out_addrs[n_outputs];
4809         size_t              out_size = 0;
4810
4811         argument = statement->outputs;
4812         for ( ; argument != NULL; argument = argument->next) {
4813                 const char *constraints = argument->constraints.begin;
4814                 asm_constraint_flags_t asm_flags
4815                         = be_parse_asm_constraints(constraints);
4816
4817                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4818                         errorf(&statement->base.source_position,
4819                                "some constraints in '%s' are not supported", constraints);
4820                         continue;
4821                 }
4822                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4823                         errorf(&statement->base.source_position,
4824                                "some constraints in '%s' are invalid", constraints);
4825                         continue;
4826                 }
4827                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4828                         errorf(&statement->base.source_position,
4829                                "no write flag specified for output constraints '%s'",
4830                                constraints);
4831                         continue;
4832                 }
4833
4834                 unsigned pos = next_pos++;
4835                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4836                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4837                         expression_t *expr = argument->expression;
4838                         ir_node      *addr = expression_to_addr(expr);
4839                         /* in+output, construct an artifical same_as constraint on the
4840                          * input */
4841                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4842                                 char     buf[64];
4843                                 ir_node *value = get_value_from_lvalue(expr, addr);
4844
4845                                 snprintf(buf, sizeof(buf), "%u", pos);
4846
4847                                 ir_asm_constraint constraint;
4848                                 constraint.pos              = pos;
4849                                 constraint.constraint       = new_id_from_str(buf);
4850                                 constraint.mode             = get_ir_mode(expr->base.type);
4851                                 tmp_in_constraints[in_size] = constraint;
4852                                 ins[in_size] = value;
4853
4854                                 ++in_size;
4855                         }
4856
4857                         out_exprs[out_size] = expr;
4858                         out_addrs[out_size] = addr;
4859                         ++out_size;
4860                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4861                         /* pure memory ops need no input (but we have to make sure we
4862                          * attach to the memory) */
4863                         assert(! (asm_flags &
4864                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4865                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4866                         needs_memory = true;
4867
4868                         /* we need to attach the address to the inputs */
4869                         expression_t *expr = argument->expression;
4870
4871                         ir_asm_constraint constraint;
4872                         constraint.pos              = pos;
4873                         constraint.constraint       = new_id_from_str(constraints);
4874                         constraint.mode             = NULL;
4875                         tmp_in_constraints[in_size] = constraint;
4876
4877                         ins[in_size]          = expression_to_addr(expr);
4878                         ++in_size;
4879                         continue;
4880                 } else {
4881                         errorf(&statement->base.source_position,
4882                                "only modifiers but no place set in constraints '%s'",
4883                                constraints);
4884                         continue;
4885                 }
4886
4887                 ir_asm_constraint constraint;
4888                 constraint.pos        = pos;
4889                 constraint.constraint = new_id_from_str(constraints);
4890                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4891
4892                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4893         }
4894         assert(obstack_object_size(&asm_obst)
4895                         == out_size * sizeof(ir_asm_constraint));
4896         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4897
4898
4899         obstack_grow(&asm_obst, tmp_in_constraints,
4900                      in_size * sizeof(tmp_in_constraints[0]));
4901         /* find and count input and output arguments */
4902         argument = statement->inputs;
4903         for ( ; argument != NULL; argument = argument->next) {
4904                 const char *constraints = argument->constraints.begin;
4905                 asm_constraint_flags_t asm_flags
4906                         = be_parse_asm_constraints(constraints);
4907
4908                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4909                         errorf(&statement->base.source_position,
4910                                "some constraints in '%s' are not supported", constraints);
4911                         continue;
4912                 }
4913                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4914                         errorf(&statement->base.source_position,
4915                                "some constraints in '%s' are invalid", constraints);
4916                         continue;
4917                 }
4918                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4919                         errorf(&statement->base.source_position,
4920                                "write flag specified for input constraints '%s'",
4921                                constraints);
4922                         continue;
4923                 }
4924
4925                 ir_node *input;
4926                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4927                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4928                         /* we can treat this as "normal" input */
4929                         input = expression_to_firm(argument->expression);
4930                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4931                         /* pure memory ops need no input (but we have to make sure we
4932                          * attach to the memory) */
4933                         assert(! (asm_flags &
4934                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4935                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4936                         needs_memory = true;
4937                         input = expression_to_addr(argument->expression);
4938                 } else {
4939                         errorf(&statement->base.source_position,
4940                                "only modifiers but no place set in constraints '%s'",
4941                                constraints);
4942                         continue;
4943                 }
4944
4945                 ir_asm_constraint constraint;
4946                 constraint.pos        = next_pos++;
4947                 constraint.constraint = new_id_from_str(constraints);
4948                 constraint.mode       = get_irn_mode(input);
4949
4950                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4951                 ins[in_size++] = input;
4952         }
4953
4954         if (needs_memory) {
4955                 ir_asm_constraint constraint;
4956                 constraint.pos        = next_pos++;
4957                 constraint.constraint = new_id_from_str("");
4958                 constraint.mode       = mode_M;
4959
4960                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4961                 ins[in_size++] = get_store();
4962         }
4963
4964         assert(obstack_object_size(&asm_obst)
4965                         == in_size * sizeof(ir_asm_constraint));
4966         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4967
4968         /* create asm node */
4969         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4970
4971         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4972
4973         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4974                                   out_size, output_constraints,
4975                                   n_clobbers, clobbers, asm_text);
4976
4977         if (statement->is_volatile) {
4978                 set_irn_pinned(node, op_pin_state_pinned);
4979         } else {
4980                 set_irn_pinned(node, op_pin_state_floats);
4981         }
4982
4983         /* create output projs & connect them */
4984         if (needs_memory) {
4985                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4986                 set_store(projm);
4987         }
4988
4989         size_t i;
4990         for (i = 0; i < out_size; ++i) {
4991                 const expression_t *out_expr = out_exprs[i];
4992                 long                pn       = i;
4993                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4994                 ir_node            *proj     = new_Proj(node, mode, pn);
4995                 ir_node            *addr     = out_addrs[i];
4996
4997                 set_value_for_expression_addr(out_expr, proj, addr);
4998         }
4999 }
5000
5001 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
5002         statement_to_firm(statement->try_statement);
5003         warningf(&statement->base.source_position, "structured exception handling ignored");
5004 }
5005
5006 static void     leave_statement_to_firm(leave_statement_t *statement) {
5007         errorf(&statement->base.source_position, "__leave not supported yet");
5008 }
5009
5010 /**
5011  * Transform a statement.
5012  */
5013 static void statement_to_firm(statement_t *statement)
5014 {
5015 #ifndef NDEBUG
5016         assert(!statement->base.transformed);
5017         statement->base.transformed = true;
5018 #endif
5019
5020         switch (statement->kind) {
5021         case STATEMENT_INVALID:
5022                 panic("invalid statement found");
5023                 return;
5024         case STATEMENT_EMPTY:
5025                 /* nothing */
5026                 return;
5027         case STATEMENT_COMPOUND:
5028                 compound_statement_to_firm(&statement->compound);
5029                 return;
5030         case STATEMENT_RETURN:
5031                 return_statement_to_firm(&statement->returns);
5032                 return;
5033         case STATEMENT_EXPRESSION:
5034                 expression_statement_to_firm(&statement->expression);
5035                 return;
5036         case STATEMENT_IF:
5037                 if_statement_to_firm(&statement->ifs);
5038                 return;
5039         case STATEMENT_WHILE:
5040                 while_statement_to_firm(&statement->whiles);
5041                 return;
5042         case STATEMENT_DO_WHILE:
5043                 do_while_statement_to_firm(&statement->do_while);
5044                 return;
5045         case STATEMENT_DECLARATION:
5046                 declaration_statement_to_firm(&statement->declaration);
5047                 return;
5048         case STATEMENT_BREAK:
5049                 create_jump_statement(statement, get_break_label());
5050                 return;
5051         case STATEMENT_CONTINUE:
5052                 create_jump_statement(statement, continue_label);
5053                 return;
5054         case STATEMENT_SWITCH:
5055                 switch_statement_to_firm(&statement->switchs);
5056                 return;
5057         case STATEMENT_CASE_LABEL:
5058                 case_label_to_firm(&statement->case_label);
5059                 return;
5060         case STATEMENT_FOR:
5061                 for_statement_to_firm(&statement->fors);
5062                 return;
5063         case STATEMENT_LABEL:
5064                 label_to_firm(&statement->label);
5065                 return;
5066         case STATEMENT_LOCAL_LABEL:
5067                 /* local labels transform the semantics of labels while parsing
5068                  * they don't need any special treatment here */
5069                 return;
5070         case STATEMENT_GOTO:
5071                 goto_to_firm(&statement->gotos);
5072                 return;
5073         case STATEMENT_ASM:
5074                 asm_statement_to_firm(&statement->asms);
5075                 return;
5076         case STATEMENT_MS_TRY:
5077                 ms_try_statement_to_firm(&statement->ms_try);
5078                 return;
5079         case STATEMENT_LEAVE:
5080                 leave_statement_to_firm(&statement->leave);
5081                 return;
5082         }
5083         panic("Statement not implemented\n");
5084 }
5085
5086 static int count_local_variables(const entity_t *entity,
5087                                  const entity_t *const end)
5088 {
5089         int count = 0;
5090         for (; entity != end; entity = entity->base.next) {
5091                 if (entity->kind != ENTITY_VARIABLE)
5092                         continue;
5093                 type_t *type = skip_typeref(entity->declaration.type);
5094
5095                 if (!entity->variable.address_taken && is_type_scalar(type))
5096                         ++count;
5097         }
5098         return count;
5099 }
5100
5101 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5102 {
5103         int *const count = env;
5104
5105         switch (stmt->kind) {
5106         case STATEMENT_DECLARATION: {
5107                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5108                 *count += count_local_variables(decl_stmt->declarations_begin,
5109                                                                                 decl_stmt->declarations_end->base.next);
5110                 break;
5111         }
5112
5113         case STATEMENT_FOR:
5114                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5115                 break;
5116
5117         default:
5118                 break;
5119         }
5120 }
5121
5122 static int get_function_n_local_vars(entity_t *entity)
5123 {
5124         int count = 0;
5125
5126         /* count parameters */
5127         count += count_local_variables(entity->function.parameters.entities, NULL);
5128
5129         /* count local variables declared in body */
5130         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5131                         &count);
5132         return count;
5133 }
5134
5135 static void initialize_function_parameters(entity_t *entity)
5136 {
5137         assert(entity->kind == ENTITY_FUNCTION);
5138         ir_graph *irg             = current_ir_graph;
5139         ir_node  *args            = get_irg_args(irg);
5140         ir_node  *start_block     = get_irg_start_block(irg);
5141         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5142
5143         int       n         = 0;
5144         entity_t *parameter = entity->function.parameters.entities;
5145         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5146                 assert(parameter->kind == ENTITY_VARIABLE);
5147                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5148                 type_t *type = skip_typeref(parameter->declaration.type);
5149
5150                 bool needs_entity = parameter->variable.address_taken;
5151                 assert(!is_type_array(type));
5152                 if (is_type_compound(type)) {
5153                         needs_entity = true;
5154                 }
5155
5156                 if (needs_entity) {
5157                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5158                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5159                         set_entity_ident(entity, id);
5160
5161                         parameter->declaration.kind
5162                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5163                         parameter->variable.v.entity = entity;
5164                         continue;
5165                 }
5166
5167                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5168                 ir_mode *param_mode   = get_type_mode(param_irtype);
5169
5170                 long     pn    = n;
5171                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5172
5173                 ir_mode *mode = get_ir_mode(type);
5174                 value = create_conv(NULL, value, mode);
5175                 value = do_strict_conv(NULL, value);
5176
5177                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5178                 parameter->variable.v.value_number = next_value_number_function;
5179                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5180                                         (variable_t*) &parameter->variable);
5181                 ++next_value_number_function;
5182
5183                 set_value(parameter->variable.v.value_number, value);
5184         }
5185 }
5186
5187 /**
5188  * Handle additional decl modifiers for IR-graphs
5189  *
5190  * @param irg            the IR-graph
5191  * @param dec_modifiers  additional modifiers
5192  */
5193 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5194 {
5195         if (decl_modifiers & DM_NORETURN) {
5196                 /* TRUE if the declaration includes the Microsoft
5197                    __declspec(noreturn) specifier. */
5198                 set_irg_additional_property(irg, mtp_property_noreturn);
5199         }
5200         if (decl_modifiers & DM_NOTHROW) {
5201                 /* TRUE if the declaration includes the Microsoft
5202                    __declspec(nothrow) specifier. */
5203                 set_irg_additional_property(irg, mtp_property_nothrow);
5204         }
5205         if (decl_modifiers & DM_NAKED) {
5206                 /* TRUE if the declaration includes the Microsoft
5207                    __declspec(naked) specifier. */
5208                 set_irg_additional_property(irg, mtp_property_naked);
5209         }
5210         if (decl_modifiers & DM_FORCEINLINE) {
5211                 /* TRUE if the declaration includes the
5212                    Microsoft __forceinline specifier. */
5213                 set_irg_inline_property(irg, irg_inline_forced);
5214         }
5215         if (decl_modifiers & DM_NOINLINE) {
5216                 /* TRUE if the declaration includes the Microsoft
5217                    __declspec(noinline) specifier. */
5218                 set_irg_inline_property(irg, irg_inline_forbidden);
5219         }
5220 }
5221
5222 static void add_function_pointer(ir_type *segment, ir_entity *method,
5223                                  const char *unique_template)
5224 {
5225         ir_type   *method_type  = get_entity_type(method);
5226         ident     *id           = id_unique(unique_template);
5227         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5228
5229         ident     *ide          = id_unique(unique_template);
5230         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5231         ir_graph  *irg          = get_const_code_irg();
5232         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5233                                                            method, NULL);
5234
5235         set_entity_compiler_generated(ptr, 1);
5236         set_entity_variability(ptr, variability_constant);
5237         set_atomic_ent_value(ptr, val);
5238 }
5239
5240 /**
5241  * Generate possible IJmp branches to a given label block.
5242  */
5243 static void gen_ijmp_branches(ir_node *block) {
5244         ir_node *ijmp;
5245         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5246                 add_immBlock_pred(block, ijmp);
5247         }
5248 }
5249
5250 /**
5251  * Create code for a function.
5252  */
5253 static void create_function(entity_t *entity)
5254 {
5255         assert(entity->kind == ENTITY_FUNCTION);
5256         ir_entity *function_entity = get_function_entity(entity);
5257
5258         if (entity->function.statement == NULL)
5259                 return;
5260
5261         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5262                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5263                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5264         }
5265         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5266                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5267                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5268         }
5269
5270         current_function_entity = entity;
5271         current_function_name   = NULL;
5272         current_funcsig         = NULL;
5273
5274         assert(all_labels == NULL);
5275         all_labels = NEW_ARR_F(label_t *, 0);
5276         ijmp_list  = NULL;
5277
5278         int       n_local_vars = get_function_n_local_vars(entity);
5279         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5280
5281         ir_graph *old_current_function = current_function;
5282         current_function = irg;
5283
5284         set_irg_fp_model(irg, firm_opt.fp_model);
5285         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5286         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5287
5288         ir_node *first_block = get_cur_block();
5289
5290         /* set inline flags */
5291         if (entity->function.is_inline)
5292                 set_irg_inline_property(irg, irg_inline_recomended);
5293         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5294
5295         next_value_number_function = 0;
5296         initialize_function_parameters(entity);
5297
5298         statement_to_firm(entity->function.statement);
5299
5300         ir_node *end_block = get_irg_end_block(irg);
5301
5302         /* do we have a return statement yet? */
5303         if (get_cur_block() != NULL) {
5304                 type_t *type = skip_typeref(entity->declaration.type);
5305                 assert(is_type_function(type));
5306                 const function_type_t *func_type   = &type->function;
5307                 const type_t          *return_type
5308                         = skip_typeref(func_type->return_type);
5309
5310                 ir_node *ret;
5311                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5312                         ret = new_Return(get_store(), 0, NULL);
5313                 } else {
5314                         ir_mode *mode;
5315                         if (is_type_scalar(return_type)) {
5316                                 mode = get_ir_mode(func_type->return_type);
5317                         } else {
5318                                 mode = mode_P_data;
5319                         }
5320
5321                         ir_node *in[1];
5322                         /* §5.1.2.2.3 main implicitly returns 0 */
5323                         if (is_main(entity)) {
5324                                 in[0] = new_Const(mode, get_mode_null(mode));
5325                         } else {
5326                                 in[0] = new_Unknown(mode);
5327                         }
5328                         ret = new_Return(get_store(), 1, in);
5329                 }
5330                 add_immBlock_pred(end_block, ret);
5331         }
5332
5333         bool has_computed_gotos = false;
5334         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5335                 label_t *label = all_labels[i];
5336                 if (label->address_taken) {
5337                         gen_ijmp_branches(label->block);
5338                         has_computed_gotos = true;
5339                 }
5340                 mature_immBlock(label->block);
5341         }
5342         if (has_computed_gotos) {
5343                 /* if we have computed goto's in the function, we cannot inline it */
5344                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5345                         warningf(&entity->base.source_position,
5346                                  "function '%Y' can never be inlined because it contains a computed goto",
5347                                  entity->base.symbol);
5348                 }
5349                 set_irg_inline_property(irg, irg_inline_forbidden);
5350         }
5351
5352         DEL_ARR_F(all_labels);
5353         all_labels = NULL;
5354
5355         mature_immBlock(first_block);
5356         mature_immBlock(end_block);
5357
5358         irg_finalize_cons(irg);
5359
5360         /* finalize the frame type */
5361         ir_type *frame_type = get_irg_frame_type(irg);
5362         int      n          = get_compound_n_members(frame_type);
5363         int      align_all  = 4;
5364         int      offset     = 0;
5365         for (int i = 0; i < n; ++i) {
5366                 ir_entity *entity      = get_compound_member(frame_type, i);
5367                 ir_type   *entity_type = get_entity_type(entity);
5368
5369                 int align = get_type_alignment_bytes(entity_type);
5370                 if (align > align_all)
5371                         align_all = align;
5372                 int misalign = 0;
5373                 if (align > 0) {
5374                         misalign  = offset % align;
5375                         if (misalign > 0) {
5376                                 offset += align - misalign;
5377                         }
5378                 }
5379
5380                 set_entity_offset(entity, offset);
5381                 offset += get_type_size_bytes(entity_type);
5382         }
5383         set_type_size_bytes(frame_type, offset);
5384         set_type_alignment_bytes(frame_type, align_all);
5385
5386         irg_vrfy(irg);
5387         current_function = old_current_function;
5388
5389         /* create inner functions */
5390         entity_t *inner;
5391         for (inner = next_inner_function(); inner != NULL;
5392              inner = next_inner_function()) {
5393                 create_function(inner);
5394         }
5395 }
5396
5397 static void scope_to_firm(scope_t *scope)
5398 {
5399         /* first pass: create declarations */
5400         entity_t *entity = scope->entities;
5401         for ( ; entity != NULL; entity = entity->base.next) {
5402                 if (entity->base.symbol == NULL)
5403                         continue;
5404
5405                 if (entity->kind == ENTITY_FUNCTION) {
5406                         get_function_entity(entity);
5407                 } else if (entity->kind == ENTITY_VARIABLE) {
5408                         create_global_variable(entity);
5409                 }
5410         }
5411
5412         /* second pass: create code/initializers */
5413         entity = scope->entities;
5414         for ( ; entity != NULL; entity = entity->base.next) {
5415                 if (entity->base.symbol == NULL)
5416                         continue;
5417
5418                 if (entity->kind == ENTITY_FUNCTION) {
5419                         create_function(entity);
5420                 } else if (entity->kind == ENTITY_VARIABLE) {
5421                         assert(entity->declaration.kind
5422                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5423                         current_ir_graph = get_const_code_irg();
5424                         create_variable_initializer(entity);
5425                 }
5426         }
5427 }
5428
5429 void init_ast2firm(void)
5430 {
5431         obstack_init(&asm_obst);
5432         init_atomic_modes();
5433
5434         /* OS option must be set to the backend */
5435         switch (firm_opt.os_support) {
5436         case OS_SUPPORT_MINGW:
5437                 create_ld_ident = create_name_win32;
5438                 break;
5439         case OS_SUPPORT_LINUX:
5440                 create_ld_ident = create_name_linux_elf;
5441                 break;
5442         case OS_SUPPORT_MACHO:
5443                 create_ld_ident = create_name_macho;
5444                 break;
5445         default:
5446                 panic("unexpected OS support mode");
5447         }
5448
5449         /* create idents for all known runtime functions */
5450         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5451                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5452         }
5453
5454         sym_C = symbol_table_insert("C");
5455
5456         entitymap_init(&entitymap);
5457 }
5458
5459 static void init_ir_types(void)
5460 {
5461         static int ir_types_initialized = 0;
5462         if (ir_types_initialized)
5463                 return;
5464         ir_types_initialized = 1;
5465
5466         ir_type_int        = get_ir_type(type_int);
5467         ir_type_const_char = get_ir_type(type_const_char);
5468         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5469         ir_type_void       = get_ir_type(type_void);
5470 }
5471
5472 void exit_ast2firm(void)
5473 {
5474         entitymap_destroy(&entitymap);
5475         obstack_free(&asm_obst, NULL);
5476 }
5477
5478 static void global_asm_to_firm(statement_t *s)
5479 {
5480         for (; s != NULL; s = s->base.next) {
5481                 assert(s->kind == STATEMENT_ASM);
5482
5483                 char const *const text = s->asms.asm_text.begin;
5484                 size_t            size = s->asms.asm_text.size;
5485
5486                 /* skip the last \0 */
5487                 if (text[size - 1] == '\0')
5488                         --size;
5489
5490                 ident *const id = new_id_from_chars(text, size);
5491                 add_irp_asm(id);
5492         }
5493 }
5494
5495 void translation_unit_to_firm(translation_unit_t *unit)
5496 {
5497         /* just to be sure */
5498         continue_label           = NULL;
5499         break_label              = NULL;
5500         current_switch_cond      = NULL;
5501         current_translation_unit = unit;
5502
5503         init_ir_types();
5504         inner_functions = NEW_ARR_F(entity_t *, 0);
5505
5506         scope_to_firm(&unit->scope);
5507         global_asm_to_firm(unit->global_asm);
5508
5509         DEL_ARR_F(inner_functions);
5510         inner_functions  = NULL;
5511
5512         current_ir_graph         = NULL;
5513         current_translation_unit = NULL;
5514 }