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 "walk_statements.h"
  45 #include "warning.h"
  46 #include "entitymap_t.h"
  47 #include "driver/firm_opt.h"
  48 #include "driver/firm_cmdline.h"
  49
  50 /* some idents needed for name mangling */
  51 static ident *id_underscore;
  52 static ident *id_imp;
  53
  54 static ir_type *ir_type_const_char;
  55 static ir_type *ir_type_wchar_t;
  56 static ir_type *ir_type_void;
  57 static ir_type *ir_type_int;
  58
  59 static int        next_value_number_function;
  60 static ir_node   *continue_label;
  61 static ir_node   *break_label;
  62 static ir_node   *current_switch_cond;
  63 static bool       saw_default_label;
  64 static label_t  **all_labels;
  65 static entity_t **inner_functions;
  66 static ir_node   *ijmp_list;
  67 static bool       constant_folding;
  68
  69 extern bool       have_const_functions;
  70
  71 static const entity_t     *current_function_entity;
  72 static ir_node            *current_function_name;
  73 static ir_node            *current_funcsig;
  74 static switch_statement_t *current_switch;
  75 static ir_graph           *current_function;
  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_type *get_ir_type(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 inline ir_mode *get_ir_mode(type_t *type);
 155 static void create_local_declaration(entity_t *entity);
 156
 157 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 158 {
 159         unsigned flags = get_atomic_type_flags(kind);
 160         unsigned size  = get_atomic_type_size(kind);
 161         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 162                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 163                 char            name[64];
 164                 ir_mode_sort    sort;
 165                 unsigned        bit_size     = size * 8;
 166                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 167                 ir_mode_arithmetic arithmetic;
 168
 169                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 170                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 171                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 172                                  bit_size);
 173                         sort         = irms_int_number;
 174                         arithmetic   = irma_twos_complement;
 175                 } else {
 176                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 177                         snprintf(name, sizeof(name), "F%u", bit_size);
 178                         sort         = irms_float_number;
 179                         arithmetic   = irma_ieee754;
 180                 }
 181                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 182                  * a too big amount */
 183                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 184                                    0);
 185         }
 186
 187         return NULL;
 188 }
 189
 190 /**
 191  * Initialises the atomic modes depending on the machine size.
 192  */
 193 static void init_atomic_modes(void)
 194 {
 195         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 196                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 197         }
 198         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 199         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 200
 201         /* there's no real void type in firm */
 202         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 203
 204         /* initialize pointer modes */
 205         char            name[64];
 206         ir_mode_sort    sort         = irms_reference;
 207         unsigned        bit_size     = machine_size;
 208         bool            is_signed    = 0;
 209         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 210         unsigned        modulo_shift
 211                 = bit_size < machine_size ? machine_size : bit_size;
 212
 213         snprintf(name, sizeof(name), "p%u", machine_size);
 214         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 215                                         modulo_shift);
 216
 217         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 218         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 219
 220         /* Hmm, pointers should be machine size */
 221         set_modeP_data(ptr_mode);
 222         set_modeP_code(ptr_mode);
 223 }
 224
 225 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 226 {
 227         assert(kind <= ATOMIC_TYPE_LAST);
 228         return atomic_modes[kind];
 229 }
 230
 231 static unsigned get_compound_type_size(compound_type_t *type)
 232 {
 233         ir_type *irtype = get_ir_type((type_t*) type);
 234         return get_type_size_bytes(irtype);
 235 }
 236
 237 static unsigned get_array_type_size(array_type_t *type)
 238 {
 239         assert(!type->is_vla);
 240         ir_type *irtype = get_ir_type((type_t*) type);
 241         return get_type_size_bytes(irtype);
 242 }
 243
 244 static unsigned get_type_size_const(type_t *type)
 245 {
 246         switch(type->kind) {
 247         case TYPE_ERROR:
 248                 panic("error type occurred");
 249         case TYPE_ATOMIC:
 250                 return get_atomic_type_size(type->atomic.akind);
 251         case TYPE_COMPLEX:
 252                 return 2 * get_atomic_type_size(type->complex.akind);
 253         case TYPE_IMAGINARY:
 254                 return get_atomic_type_size(type->imaginary.akind);
 255         case TYPE_ENUM:
 256                 return get_mode_size_bytes(mode_int);
 257         case TYPE_COMPOUND_UNION:
 258         case TYPE_COMPOUND_STRUCT:
 259                 return get_compound_type_size(&type->compound);
 260         case TYPE_FUNCTION:
 261                 /* just a pointer to the function */
 262                 return get_mode_size_bytes(mode_P_code);
 263         case TYPE_POINTER:
 264                 return get_mode_size_bytes(mode_P_data);
 265         case TYPE_ARRAY:
 266                 return get_array_type_size(&type->array);
 267         case TYPE_BUILTIN:
 268                 return get_type_size_const(type->builtin.real_type);
 269         case TYPE_BITFIELD:
 270                 panic("type size of bitfield request");
 271         case TYPE_TYPEDEF:
 272         case TYPE_TYPEOF:
 273         case TYPE_INVALID:
 274                 break;
 275         }
 276         panic("Trying to determine size of invalid type");
 277 }
 278
 279 static ir_node *get_type_size(type_t *type)
 280 {
 281         type = skip_typeref(type);
 282
 283         if (is_type_array(type) && type->array.is_vla) {
 284                 ir_node *size_node = type->array.size_node;
 285                 if (size_node == NULL) {
 286                         size_node = expression_to_firm(type->array.size_expression);
 287                         assert(!is_Const(size_node));
 288                         type->array.size_node = size_node;
 289                 }
 290
 291                 ir_node *elem_size = get_type_size(type->array.element_type);
 292                 ir_mode *mode      = get_irn_mode(size_node);
 293                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 294                 return real_size;
 295         }
 296
 297         ir_mode *mode = get_ir_mode(type_size_t);
 298         symconst_symbol sym;
 299         sym.type_p = get_ir_type(type);
 300         return new_SymConst(mode, sym, symconst_type_size);
 301 }
 302
 303 static unsigned count_parameters(const function_type_t *function_type)
 304 {
 305         unsigned count = 0;
 306
 307         function_parameter_t *parameter = function_type->parameters;
 308         for ( ; parameter != NULL; parameter = parameter->next) {
 309                 ++count;
 310         }
 311
 312         return count;
 313 }
 314
 315 /**
 316  * Creates a Firm type for an atomic type
 317  */
 318 static ir_type *create_atomic_type(const atomic_type_t *type)
 319 {
 320         atomic_type_kind_t  kind   = type->akind;
 321         ir_mode            *mode   = atomic_modes[kind];
 322         ident              *id     = get_mode_ident(mode);
 323         ir_type            *irtype = new_type_primitive(id, mode);
 324
 325         set_type_alignment_bytes(irtype, type->base.alignment);
 326
 327         return irtype;
 328 }
 329
 330 /**
 331  * Creates a Firm type for a complex type
 332  */
 333 static ir_type *create_complex_type(const complex_type_t *type)
 334 {
 335         atomic_type_kind_t  kind = type->akind;
 336         ir_mode            *mode = atomic_modes[kind];
 337         ident              *id   = get_mode_ident(mode);
 338
 339         (void) id;
 340
 341         /* FIXME: finish the array */
 342         return NULL;
 343 }
 344
 345 /**
 346  * Creates a Firm type for an imaginary type
 347  */
 348 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 349 {
 350         atomic_type_kind_t  kind      = type->akind;
 351         ir_mode            *mode      = atomic_modes[kind];
 352         ident              *id        = get_mode_ident(mode);
 353         ir_type            *irtype    = new_type_primitive(id, mode);
 354
 355         set_type_alignment_bytes(irtype, type->base.alignment);
 356
 357         return irtype;
 358 }
 359
 360 /**
 361  * return type of a parameter (and take transparent union gnu extension into
 362  * account)
 363  */
 364 static type_t *get_parameter_type(type_t *type)
 365 {
 366         type = skip_typeref(type);
 367         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 368                 compound_t *compound = type->compound.compound;
 369                 type                 = compound->members.entities->declaration.type;
 370         }
 371
 372         return type;
 373 }
 374
 375 static ir_type *create_method_type(const function_type_t *function_type)
 376 {
 377         type_t  *return_type  = skip_typeref(function_type->return_type);
 378
 379         ident   *id           = id_unique("functiontype.%u");
 380         int      n_parameters = count_parameters(function_type);
 381         int      n_results    = return_type == type_void ? 0 : 1;
 382         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 383
 384         if (return_type != type_void) {
 385                 ir_type *restype = get_ir_type(return_type);
 386                 set_method_res_type(irtype, 0, restype);
 387         }
 388
 389         function_parameter_t *parameter = function_type->parameters;
 390         int                   n         = 0;
 391         for ( ; parameter != NULL; parameter = parameter->next) {
 392                 type_t  *type     = get_parameter_type(parameter->type);
 393                 ir_type *p_irtype = get_ir_type(type);
 394                 set_method_param_type(irtype, n, p_irtype);
 395                 ++n;
 396         }
 397
 398         if (function_type->variadic || function_type->unspecified_parameters) {
 399                 set_method_variadicity(irtype, variadicity_variadic);
 400         }
 401
 402         unsigned cc = get_method_calling_convention(irtype);
 403         switch (function_type->calling_convention) {
 404         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 405         case CC_CDECL:
 406 is_cdecl:
 407                 set_method_calling_convention(irtype, SET_CDECL(cc));
 408                 break;
 409
 410         case CC_STDCALL:
 411                 if (function_type->variadic || function_type->unspecified_parameters)
 412                         goto is_cdecl;
 413
 414                 /* only non-variadic function can use stdcall, else use cdecl */
 415                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 416                 break;
 417
 418         case CC_FASTCALL:
 419                 if (function_type->variadic || function_type->unspecified_parameters)
 420                         goto is_cdecl;
 421                 /* only non-variadic function can use fastcall, else use cdecl */
 422                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 423                 break;
 424
 425         case CC_THISCALL:
 426                 /* Hmm, leave default, not accepted by the parser yet. */
 427                 break;
 428         }
 429         return irtype;
 430 }
 431
 432 static ir_type *create_pointer_type(pointer_type_t *type)
 433 {
 434         type_t   *points_to    = type->points_to;
 435         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 436         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 437                                                   ir_points_to, mode_P_data);
 438
 439         return ir_type;
 440 }
 441
 442 static ir_type *create_array_type(array_type_t *type)
 443 {
 444         type_t  *element_type    = type->element_type;
 445         ir_type *ir_element_type = get_ir_type(element_type);
 446
 447         ident    *id      = id_unique("array.%u");
 448         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 449
 450         const int align = get_type_alignment_bytes(ir_element_type);
 451         set_type_alignment_bytes(ir_type, align);
 452
 453         if (type->size_constant) {
 454                 int n_elements = type->size;
 455
 456                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 457
 458                 size_t elemsize = get_type_size_bytes(ir_element_type);
 459                 if (elemsize % align > 0) {
 460                         elemsize += align - (elemsize % align);
 461                 }
 462                 set_type_size_bytes(ir_type, n_elements * elemsize);
 463         } else {
 464                 set_array_lower_bound_int(ir_type, 0, 0);
 465         }
 466         set_type_state(ir_type, layout_fixed);
 467
 468         return ir_type;
 469 }
 470
 471 /**
 472  * Return the signed integer type of size bits.
 473  *
 474  * @param size   the size
 475  */
 476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 477                                                  unsigned size)
 478 {
 479         static ir_mode *s_modes[64 + 1] = {NULL, };
 480         ir_type *res;
 481         ir_mode *mode;
 482
 483         if (size <= 0 || size > 64)
 484                 return NULL;
 485
 486         mode = s_modes[size];
 487         if (mode == NULL) {
 488                 char name[32];
 489
 490                 snprintf(name, sizeof(name), "bf_I%u", size);
 491                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 492                                    size <= 32 ? 32 : size );
 493                 s_modes[size] = mode;
 494         }
 495
 496         char name[32];
 497         snprintf(name, sizeof(name), "I%u", size);
 498         ident *id = new_id_from_str(name);
 499         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 500         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 501         set_primitive_base_type(res, base_tp);
 502
 503         return res;
 504 }
 505
 506 /**
 507  * Return the unsigned integer type of size bits.
 508  *
 509  * @param size   the size
 510  */
 511 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 512                                                    unsigned size)
 513 {
 514         static ir_mode *u_modes[64 + 1] = {NULL, };
 515         ir_type *res;
 516         ir_mode *mode;
 517
 518         if (size <= 0 || size > 64)
 519                 return NULL;
 520
 521         mode = u_modes[size];
 522         if (mode == NULL) {
 523                 char name[32];
 524
 525                 snprintf(name, sizeof(name), "bf_U%u", size);
 526                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 527                                    size <= 32 ? 32 : size );
 528                 u_modes[size] = mode;
 529         }
 530
 531         char name[32];
 532
 533         snprintf(name, sizeof(name), "U%u", size);
 534         ident *id = new_id_from_str(name);
 535         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 536         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 537         set_primitive_base_type(res, base_tp);
 538
 539         return res;
 540 }
 541
 542 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 543 {
 544         type_t *base = skip_typeref(type->base_type);
 545         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 546         ir_type *irbase = get_ir_type(base);
 547
 548         unsigned size = type->bit_size;
 549
 550         assert(!is_type_float(base));
 551         if (is_type_signed(base)) {
 552                 return get_signed_int_type_for_bit_size(irbase, size);
 553         } else {
 554                 return get_unsigned_int_type_for_bit_size(irbase, size);
 555         }
 556 }
 557
 558 #define INVALID_TYPE ((ir_type_ptr)-1)
 559
 560 enum {
 561         COMPOUND_IS_STRUCT = false,
 562         COMPOUND_IS_UNION  = true
 563 };
 564
 565 /**
 566  * Construct firm type from ast struct type.
 567  *
 568  * As anonymous inner structs get flattened to a single firm type, we might get
 569  * irtype, outer_offset and out_align passed (they represent the position of
 570  * the anonymous inner struct inside the resulting firm struct)
 571  */
 572 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 573                                      size_t *outer_offset, size_t *outer_align,
 574                                      bool incomplete, bool is_union)
 575 {
 576         compound_t *compound = type->compound;
 577
 578         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 579                 return compound->irtype;
 580         }
 581
 582         size_t align_all  = 1;
 583         size_t offset     = 0;
 584         size_t bit_offset = 0;
 585         size_t size       = 0;
 586
 587         if (irtype == NULL) {
 588                 symbol_t *symbol = compound->base.symbol;
 589                 ident    *id;
 590                 if (symbol != NULL) {
 591                         id = new_id_from_str(symbol->string);
 592                 } else {
 593                         if (is_union) {
 594                                 id = id_unique("__anonymous_union.%u");
 595                         } else {
 596                                 id = id_unique("__anonymous_struct.%u");
 597                         }
 598                 }
 599                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 600
 601                 if (is_union) {
 602                         irtype = new_d_type_union(id, dbgi);
 603                 } else {
 604                         irtype = new_d_type_struct(id, dbgi);
 605                 }
 606
 607                 compound->irtype_complete = false;
 608                 compound->irtype          = irtype;
 609         } else {
 610                 offset    = *outer_offset;
 611                 align_all = *outer_align;
 612         }
 613
 614         if (incomplete)
 615                 return irtype;
 616
 617         compound->irtype_complete = true;
 618
 619         entity_t *entry = compound->members.entities;
 620         for ( ; entry != NULL; entry = entry->base.next) {
 621                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 622                         continue;
 623
 624                 size_t prev_offset = offset;
 625
 626                 symbol_t *symbol     = entry->base.symbol;
 627                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 628                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 629
 630                 ident    *ident;
 631                 if (symbol != NULL) {
 632                         ident = new_id_from_str(symbol->string);
 633                 } else {
 634                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 635                                 create_compound_type(&entry_type->compound, irtype, &offset,
 636                                                      &align_all, false, COMPOUND_IS_STRUCT);
 637                                 goto finished_member;
 638                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 639                                 create_compound_type(&entry_type->compound, irtype, &offset,
 640                                                      &align_all, false, COMPOUND_IS_UNION);
 641                                 goto finished_member;
 642                         } else {
 643                                 assert(entry_type->kind == TYPE_BITFIELD);
 644                         }
 645                         ident = id_unique("anon.%u");
 646                 }
 647
 648                 ir_type *base_irtype;
 649                 if (entry_type->kind == TYPE_BITFIELD) {
 650                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 651                 } else {
 652                         base_irtype = get_ir_type(entry_type);
 653                 }
 654
 655                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 656                 size_t misalign        = offset % entry_alignment;
 657
 658                 ir_type   *entry_irtype = get_ir_type(entry_type);
 659                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 660
 661                 size_t base;
 662                 size_t bits_remainder;
 663                 if (entry_type->kind == TYPE_BITFIELD) {
 664                         size_t size_bits      = entry_type->bitfield.bit_size;
 665                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 666
 667                         if (size_bits > rest_size_bits) {
 668                                 /* start a new bucket */
 669                                 offset     += entry_alignment - misalign;
 670                                 bit_offset  = 0;
 671
 672                                 base           = offset;
 673                                 bits_remainder = 0;
 674                         } else {
 675                                 /* put into current bucket */
 676                                 base           = offset - misalign;
 677                                 bits_remainder = misalign * 8 + bit_offset;
 678                         }
 679
 680                         offset     += size_bits / 8;
 681                         bit_offset  = bit_offset + (size_bits % 8);
 682                 } else {
 683                         size_t entry_size = get_type_size_bytes(base_irtype);
 684                         if (misalign > 0 || bit_offset > 0)
 685                                 offset += entry_alignment - misalign;
 686
 687                         base           = offset;
 688                         bits_remainder = 0;
 689                         offset        += entry_size;
 690                         bit_offset     = 0;
 691                 }
 692
 693                 if (entry_alignment > align_all) {
 694                         if (entry_alignment % align_all != 0) {
 695                                 panic("uneven alignments not supported yet");
 696                         }
 697                         align_all = entry_alignment;
 698                 }
 699
 700                 set_entity_offset(entity, base);
 701                 set_entity_offset_bits_remainder(entity,
 702                                                  (unsigned char) bits_remainder);
 703                 //add_struct_member(irtype, entity);
 704                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 705                 assert(entry->compound_member.entity == NULL);
 706                 entry->compound_member.entity = entity;
 707
 708 finished_member:
 709                 if (is_union) {
 710                         size_t entry_size = offset - prev_offset;
 711                         if (entry_size > size) {
 712                                 size = entry_size;
 713                         }
 714                         offset     = 0;
 715                         bit_offset = 0;
 716                 }
 717         }
 718
 719         if (!is_union) {
 720                 size = offset;
 721         }
 722
 723         size_t misalign = offset % align_all;
 724         if (misalign > 0 || bit_offset > 0) {
 725                 size += align_all - misalign;
 726         }
 727
 728         if (outer_offset != NULL) {
 729                 if (!is_union) {
 730                         *outer_offset = offset;
 731                 } else {
 732                         *outer_offset += size;
 733                 }
 734
 735                 if (align_all > *outer_align) {
 736                         if (align_all % *outer_align != 0) {
 737                                 panic("uneven alignments not supported yet");
 738                         }
 739                         *outer_align = align_all;
 740                 }
 741         } else {
 742                 set_type_alignment_bytes(irtype, align_all);
 743                 set_type_size_bytes(irtype, size);
 744                 set_type_state(irtype, layout_fixed);
 745         }
 746
 747         return irtype;
 748 }
 749
 750 static ir_type *create_enum_type(enum_type_t *const type)
 751 {
 752         type->base.firm_type = ir_type_int;
 753
 754         ir_mode *const mode    = mode_int;
 755         tarval  *const one     = get_mode_one(mode);
 756         tarval  *      tv_next = get_tarval_null(mode);
 757
 758         bool constant_folding_old = constant_folding;
 759         constant_folding = true;
 760
 761         enum_t   *enume = type->enume;
 762         entity_t *entry = enume->base.next;
 763         for (; entry != NULL; entry = entry->base.next) {
 764                 if (entry->kind != ENTITY_ENUM_VALUE)
 765                         break;
 766
 767                 expression_t *const init = entry->enum_value.value;
 768                 if (init != NULL) {
 769                         ir_node *const cnst = expression_to_firm(init);
 770                         if (!is_Const(cnst)) {
 771                                 panic("couldn't fold constant");
 772                         }
 773                         tv_next = get_Const_tarval(cnst);
 774                 }
 775                 entry->enum_value.tv = tv_next;
 776                 tv_next = tarval_add(tv_next, one);
 777         }
 778
 779         constant_folding = constant_folding_old;
 780
 781         return ir_type_int;
 782 }
 783
 784 static ir_type *get_ir_type_incomplete(type_t *type)
 785 {
 786         assert(type != NULL);
 787         type = skip_typeref(type);
 788
 789         if (type->base.firm_type != NULL) {
 790                 assert(type->base.firm_type != INVALID_TYPE);
 791                 return type->base.firm_type;
 792         }
 793
 794         switch (type->kind) {
 795         case TYPE_COMPOUND_STRUCT:
 796                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 797                                             true, COMPOUND_IS_STRUCT);
 798         case TYPE_COMPOUND_UNION:
 799                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 800                                             true, COMPOUND_IS_UNION);
 801         default:
 802                 return get_ir_type(type);
 803         }
 804 }
 805
 806 static ir_type *get_ir_type(type_t *type)
 807 {
 808         assert(type != NULL);
 809
 810         type = skip_typeref(type);
 811
 812         if (type->base.firm_type != NULL) {
 813                 assert(type->base.firm_type != INVALID_TYPE);
 814                 return type->base.firm_type;
 815         }
 816
 817         ir_type *firm_type = NULL;
 818         switch (type->kind) {
 819         case TYPE_ERROR:
 820                 /* Happens while constant folding, when there was an error */
 821                 return create_atomic_type(&type_void->atomic);
 822
 823         case TYPE_ATOMIC:
 824                 firm_type = create_atomic_type(&type->atomic);
 825                 break;
 826         case TYPE_COMPLEX:
 827                 firm_type = create_complex_type(&type->complex);
 828                 break;
 829         case TYPE_IMAGINARY:
 830                 firm_type = create_imaginary_type(&type->imaginary);
 831                 break;
 832         case TYPE_FUNCTION:
 833                 firm_type = create_method_type(&type->function);
 834                 break;
 835         case TYPE_POINTER:
 836                 firm_type = create_pointer_type(&type->pointer);
 837                 break;
 838         case TYPE_ARRAY:
 839                 firm_type = create_array_type(&type->array);
 840                 break;
 841         case TYPE_COMPOUND_STRUCT:
 842                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 843                                                  false, COMPOUND_IS_STRUCT);
 844                 break;
 845         case TYPE_COMPOUND_UNION:
 846                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 847                                                  false, COMPOUND_IS_UNION);
 848                 break;
 849         case TYPE_ENUM:
 850                 firm_type = create_enum_type(&type->enumt);
 851                 break;
 852         case TYPE_BUILTIN:
 853                 firm_type = get_ir_type(type->builtin.real_type);
 854                 break;
 855         case TYPE_BITFIELD:
 856                 firm_type = create_bitfield_type(&type->bitfield);
 857                 break;
 858
 859         case TYPE_TYPEOF:
 860         case TYPE_TYPEDEF:
 861         case TYPE_INVALID:
 862                 break;
 863         }
 864         if (firm_type == NULL)
 865                 panic("unknown type found");
 866
 867         type->base.firm_type = firm_type;
 868         return firm_type;
 869 }
 870
 871 static inline ir_mode *get_ir_mode(type_t *type)
 872 {
 873         ir_type *irtype = get_ir_type(type);
 874
 875         /* firm doesn't report a mode for arrays somehow... */
 876         if (is_Array_type(irtype)) {
 877                 return mode_P_data;
 878         }
 879
 880         ir_mode *mode = get_type_mode(irtype);
 881         assert(mode != NULL);
 882         return mode;
 883 }
 884
 885 /** Names of the runtime functions. */
 886 static const struct {
 887         int        id;           /**< the rts id */
 888         int        n_res;        /**< number of return values */
 889         const char *name;        /**< the name of the rts function */
 890         int        n_params;     /**< number of parameters */
 891         unsigned   flags;        /**< language flags */
 892 } rts_data[] = {
 893         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 894         { rts_abort,      0, "abort",        0, _C89 },
 895         { rts_alloca,     1, "alloca",       1, _ALL },
 896         { rts_abs,        1, "abs",          1, _C89 },
 897         { rts_labs,       1, "labs",         1, _C89 },
 898         { rts_llabs,      1, "llabs",        1, _C99 },
 899         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 900
 901         { rts_fabs,       1, "fabs",         1, _C89 },
 902         { rts_sqrt,       1, "sqrt",         1, _C89 },
 903         { rts_cbrt,       1, "cbrt",         1, _C99 },
 904         { rts_exp,        1, "exp",          1, _C89 },
 905         { rts_exp2,       1, "exp2",         1, _C89 },
 906         { rts_exp10,      1, "exp10",        1, _GNUC },
 907         { rts_log,        1, "log",          1, _C89 },
 908         { rts_log2,       1, "log2",         1, _C89 },
 909         { rts_log10,      1, "log10",        1, _C89 },
 910         { rts_pow,        1, "pow",          2, _C89 },
 911         { rts_sin,        1, "sin",          1, _C89 },
 912         { rts_cos,        1, "cos",          1, _C89 },
 913         { rts_tan,        1, "tan",          1, _C89 },
 914         { rts_asin,       1, "asin",         1, _C89 },
 915         { rts_acos,       1, "acos",         1, _C89 },
 916         { rts_atan,       1, "atan",         1, _C89 },
 917         { rts_sinh,       1, "sinh",         1, _C89 },
 918         { rts_cosh,       1, "cosh",         1, _C89 },
 919         { rts_tanh,       1, "tanh",         1, _C89 },
 920
 921         { rts_fabsf,      1, "fabsf",        1, _C99 },
 922         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 923         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 924         { rts_expf,       1, "expf",         1, _C99 },
 925         { rts_exp2f,      1, "exp2f",        1, _C99 },
 926         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 927         { rts_logf,       1, "logf",         1, _C99 },
 928         { rts_log2f,      1, "log2f",        1, _C99 },
 929         { rts_log10f,     1, "log10f",       1, _C99 },
 930         { rts_powf,       1, "powf",         2, _C99 },
 931         { rts_sinf,       1, "sinf",         1, _C99 },
 932         { rts_cosf,       1, "cosf",         1, _C99 },
 933         { rts_tanf,       1, "tanf",         1, _C99 },
 934         { rts_asinf,      1, "asinf",        1, _C99 },
 935         { rts_acosf,      1, "acosf",        1, _C99 },
 936         { rts_atanf,      1, "atanf",        1, _C99 },
 937         { rts_sinhf,      1, "sinhf",        1, _C99 },
 938         { rts_coshf,      1, "coshf",        1, _C99 },
 939         { rts_tanhf,      1, "tanhf",        1, _C99 },
 940
 941         { rts_fabsl,      1, "fabsl",        1, _C99 },
 942         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 943         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 944         { rts_expl,       1, "expl",         1, _C99 },
 945         { rts_exp2l,      1, "exp2l",        1, _C99 },
 946         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 947         { rts_logl,       1, "logl",         1, _C99 },
 948         { rts_log2l,      1, "log2l",        1, _C99 },
 949         { rts_log10l,     1, "log10l",       1, _C99 },
 950         { rts_powl,       1, "powl",         2, _C99 },
 951         { rts_sinl,       1, "sinl",         1, _C99 },
 952         { rts_cosl,       1, "cosl",         1, _C99 },
 953         { rts_tanl,       1, "tanl",         1, _C99 },
 954         { rts_asinl,      1, "asinl",        1, _C99 },
 955         { rts_acosl,      1, "acosl",        1, _C99 },
 956         { rts_atanl,      1, "atanl",        1, _C99 },
 957         { rts_sinhl,      1, "sinhl",        1, _C99 },
 958         { rts_coshl,      1, "coshl",        1, _C99 },
 959         { rts_tanhl,      1, "tanhl",        1, _C99 },
 960
 961         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 962         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 963         { rts_strcmp,     1, "strcmp",       2, _C89 },
 964         { rts_strncmp,    1, "strncmp",      3, _C89 }
 965 };
 966
 967 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 968
 969 /**
 970  * Mangles an entity linker (ld) name for win32 usage.
 971  *
 972  * @param ent          the entity to be mangled
 973  * @param declaration  the declaration
 974  */
 975 static ident *create_ld_ident_win32(ir_entity *irentity, entity_t *entity)
 976 {
 977         ident *id;
 978
 979         if (is_Method_type(get_entity_type(irentity)))
 980                 id = decorate_win32_c_fkt(irentity, get_entity_ident(irentity));
 981         else {
 982                 /* always add an underscore in win32 */
 983                 id = mangle(id_underscore, get_entity_ident(irentity));
 984         }
 985
 986         assert(is_declaration(entity));
 987         decl_modifiers_t decl_modifiers = entity->declaration.modifiers;
 988         if (decl_modifiers & DM_DLLIMPORT) {
 989                 /* add prefix for imported symbols */
 990                 id = mangle(id_imp, id);
 991         }
 992         return id;
 993 }
 994
 995 /**
 996  * Mangles an entity linker (ld) name for Linux ELF usage.
 997  *
 998  * @param ent          the entity to be mangled
 999  * @param declaration  the declaration
1000  */
1001 static ident *create_ld_ident_linux_elf(ir_entity *irentity, entity_t *entity)
1002 {
1003         (void) entity;
1004         return get_entity_ident(irentity);
1005 }
1006
1007 /**
1008  * Mangles an entity linker (ld) name for Mach-O usage.
1009  *
1010  * @param ent          the entity to be mangled
1011  * @param declaration  the declaration
1012  */
1013 static ident *create_ld_ident_macho(ir_entity *irentity, entity_t *entity)
1014 {
1015         (void) entity;
1016         ident *id = mangle(id_underscore, get_entity_ident(irentity));
1017         return id;
1018 }
1019
1020 typedef ident* (*create_ld_ident_func)(ir_entity *irentity, entity_t *entity);
1021 create_ld_ident_func create_ld_ident = create_ld_ident_linux_elf;
1022
1023 /**
1024  * Handle GNU attributes for entities
1025  *
1026  * @param ent   the entity
1027  * @param decl  the routine declaration
1028  */
1029 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1030 {
1031         assert(is_declaration(entity));
1032         decl_modifiers_t modifiers = entity->declaration.modifiers;
1033         if (modifiers & DM_PURE) {
1034                 /* TRUE if the declaration includes the GNU
1035                    __attribute__((pure)) specifier. */
1036                 set_entity_additional_property(irentity, mtp_property_pure);
1037         }
1038         if (modifiers & DM_CONST) {
1039                 set_entity_additional_property(irentity, mtp_property_const);
1040                 have_const_functions = true;
1041         }
1042         if (modifiers & DM_USED) {
1043                 /* TRUE if the declaration includes the GNU
1044                    __attribute__((used)) specifier. */
1045                 set_entity_stickyness(irentity, stickyness_sticky);
1046         }
1047 }
1048
1049 /**
1050  * Creates an entity representing a function.
1051  *
1052  * @param declaration  the function declaration
1053  */
1054 static ir_entity *get_function_entity(entity_t *entity)
1055 {
1056         assert(entity->kind == ENTITY_FUNCTION);
1057         if (entity->function.entity != NULL) {
1058                 return entity->function.entity;
1059         }
1060
1061         symbol_t *symbol = entity->base.symbol;
1062         ident    *id     = new_id_from_str(symbol->string);
1063
1064         ir_type   *global_type    = get_glob_type();
1065         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1066         bool const has_body       = entity->function.statement != NULL;
1067
1068         /* already an entity defined? */
1069         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1070         if (irentity != NULL) {
1071                 if (get_entity_visibility(irentity) == visibility_external_allocated
1072                                 && has_body) {
1073                         set_entity_visibility(irentity, visibility_external_visible);
1074                 }
1075                 goto entity_created;
1076         }
1077
1078         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1079         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1080         set_entity_ld_ident(irentity, create_ld_ident(irentity, entity));
1081
1082         handle_gnu_attributes_ent(irentity, entity);
1083
1084         /* static inline             => local
1085          * extern inline             => local
1086          * inline without definition => local
1087          * inline with definition    => external_visible */
1088         storage_class_tag_t const storage_class
1089                 = (storage_class_tag_t) entity->declaration.storage_class;
1090         bool                const is_inline     = entity->function.is_inline;
1091         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1092                 set_entity_visibility(irentity, visibility_external_visible);
1093         } else if (storage_class == STORAGE_CLASS_STATIC ||
1094                    (is_inline && has_body)) {
1095                 if (!has_body) {
1096                         /* this entity was declared, but is defined nowhere */
1097                         set_entity_peculiarity(irentity, peculiarity_description);
1098                 }
1099                 set_entity_visibility(irentity, visibility_local);
1100         } else if (has_body) {
1101                 set_entity_visibility(irentity, visibility_external_visible);
1102         } else {
1103                 set_entity_visibility(irentity, visibility_external_allocated);
1104         }
1105         set_entity_allocation(irentity, allocation_static);
1106
1107         /* We should check for file scope here, but as long as we compile C only
1108            this is not needed. */
1109         if (! firm_opt.freestanding) {
1110                 /* check for a known runtime function */
1111                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1112                         if (id != rts_idents[i])
1113                                 continue;
1114
1115                         /* ignore those rts functions not necessary needed for current mode */
1116                         if ((c_mode & rts_data[i].flags) == 0)
1117                                 continue;
1118                         assert(rts_entities[rts_data[i].id] == NULL);
1119                         rts_entities[rts_data[i].id] = irentity;
1120                 }
1121         }
1122
1123         entitymap_insert(&entitymap, symbol, irentity);
1124
1125 entity_created:
1126         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1127         entity->function.entity  = irentity;
1128
1129         return irentity;
1130 }
1131
1132 /**
1133  * Creates a Const node representing a constant.
1134  */
1135 static ir_node *const_to_firm(const const_expression_t *cnst)
1136 {
1137         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1138         ir_mode  *mode = get_ir_mode(cnst->base.type);
1139
1140         char    buf[128];
1141         tarval *tv;
1142         size_t  len;
1143         if (mode_is_float(mode)) {
1144                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1145         } else {
1146                 if (mode_is_signed(mode)) {
1147                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1148                 } else {
1149                         len = snprintf(buf, sizeof(buf), "%llu",
1150                                        (unsigned long long) cnst->v.int_value);
1151                 }
1152                 tv = new_tarval_from_str(buf, len, mode);
1153         }
1154
1155         return new_d_Const(dbgi, mode, tv);
1156 }
1157
1158 /**
1159  * Creates a Const node representing a character constant.
1160  */
1161 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1162 {
1163         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1164         ir_mode  *mode = get_ir_mode(cnst->base.type);
1165
1166         long long int v = 0;
1167         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1168                 if (char_is_signed) {
1169                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1170                 } else {
1171                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1172                 }
1173         }
1174         char    buf[128];
1175         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1176         tarval *tv = new_tarval_from_str(buf, len, mode);
1177
1178         return new_d_Const(dbgi, mode, tv);
1179 }
1180
1181 /**
1182  * Creates a Const node representing a wide character constant.
1183  */
1184 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1185 {
1186         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1187         ir_mode  *mode = get_ir_mode(cnst->base.type);
1188
1189         long long int v = cnst->v.wide_character.begin[0];
1190
1191         char    buf[128];
1192         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1193         tarval *tv = new_tarval_from_str(buf, len, mode);
1194
1195         return new_d_Const(dbgi, mode, tv);
1196 }
1197
1198 /**
1199  * Creates a SymConst for a given entity.
1200  *
1201  * @param dbgi    debug info
1202  * @param mode    the (reference) mode for the SymConst
1203  * @param entity  the entity
1204  */
1205 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1206                               ir_entity *entity)
1207 {
1208         assert(entity != NULL);
1209         union symconst_symbol sym;
1210         sym.entity_p = entity;
1211         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1212 }
1213
1214 /**
1215  * Creates a SymConst node representing a string constant.
1216  *
1217  * @param src_pos    the source position of the string constant
1218  * @param id_prefix  a prefix for the name of the generated string constant
1219  * @param value      the value of the string constant
1220  */
1221 static ir_node *string_to_firm(const source_position_t *const src_pos,
1222                                const char *const id_prefix,
1223                                const string_t *const value)
1224 {
1225         ir_type  *const global_type = get_glob_type();
1226         dbg_info *const dbgi        = get_dbg_info(src_pos);
1227         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1228                                                        ir_type_const_char, dbgi);
1229
1230         ident     *const id     = id_unique(id_prefix);
1231         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1232         set_entity_ld_ident(entity, id);
1233         set_entity_variability(entity, variability_constant);
1234         set_entity_allocation(entity, allocation_static);
1235
1236         ir_type *const elem_type = ir_type_const_char;
1237         ir_mode *const mode      = get_type_mode(elem_type);
1238
1239         const char* const string = value->begin;
1240         const size_t      slen   = value->size;
1241
1242         set_array_lower_bound_int(type, 0, 0);
1243         set_array_upper_bound_int(type, 0, slen);
1244         set_type_size_bytes(type, slen);
1245         set_type_state(type, layout_fixed);
1246
1247         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1248         for (size_t i = 0; i < slen; ++i) {
1249                 tvs[i] = new_tarval_from_long(string[i], mode);
1250         }
1251
1252         set_array_entity_values(entity, tvs, slen);
1253         free(tvs);
1254
1255         return create_symconst(dbgi, mode_P_data, entity);
1256 }
1257
1258 /**
1259  * Creates a SymConst node representing a string literal.
1260  *
1261  * @param literal   the string literal
1262  */
1263 static ir_node *string_literal_to_firm(
1264                 const string_literal_expression_t* literal)
1265 {
1266         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1267                               &literal->value);
1268 }
1269
1270 /**
1271  * Creates a SymConst node representing a wide string literal.
1272  *
1273  * @param literal   the wide string literal
1274  */
1275 static ir_node *wide_string_literal_to_firm(
1276         const wide_string_literal_expression_t* const literal)
1277 {
1278         ir_type *const global_type = get_glob_type();
1279         ir_type *const elem_type   = ir_type_wchar_t;
1280         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1281         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1282                                                     elem_type, dbgi);
1283
1284         ident     *const id     = id_unique("Lstr.%u");
1285         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1286         set_entity_ld_ident(entity, id);
1287         set_entity_variability(entity, variability_constant);
1288         set_entity_allocation(entity, allocation_static);
1289
1290         ir_mode *const mode      = get_type_mode(elem_type);
1291
1292         const wchar_rep_t *const string = literal->value.begin;
1293         const size_t             slen   = literal->value.size;
1294
1295         set_array_lower_bound_int(type, 0, 0);
1296         set_array_upper_bound_int(type, 0, slen);
1297         set_type_size_bytes(type, slen);
1298         set_type_state(type, layout_fixed);
1299
1300         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1301         for (size_t i = 0; i < slen; ++i) {
1302                 tvs[i] = new_tarval_from_long(string[i], mode);
1303         }
1304
1305         set_array_entity_values(entity, tvs, slen);
1306         free(tvs);
1307
1308         return create_symconst(dbgi, mode_P_data, entity);
1309 }
1310
1311 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1312                                       ir_node *const addr)
1313 {
1314         ir_type *irtype = get_ir_type(type);
1315         if (is_compound_type(irtype)
1316                         || is_Method_type(irtype)
1317                         || is_Array_type(irtype)) {
1318                 return addr;
1319         }
1320
1321         ir_mode *const mode     = get_type_mode(irtype);
1322         ir_node *const memory   = get_store();
1323         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1324         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1325         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1326
1327         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1328                 set_Load_volatility(load, volatility_is_volatile);
1329         }
1330
1331         set_store(load_mem);
1332         return load_res;
1333 }
1334
1335 /**
1336  * Creates a strict Conv if neccessary.
1337  */
1338 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1339 {
1340         ir_mode *mode = get_irn_mode(node);
1341
1342         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1343                 return node;
1344         if (!mode_is_float(mode))
1345                 return node;
1346
1347         /* check if there is already a Conv */
1348         if (is_Conv(node)) {
1349                 /* convert it into a strict Conv */
1350                 set_Conv_strict(node, 1);
1351                 return node;
1352         }
1353
1354         /* otherwise create a new one */
1355         return new_d_strictConv(dbgi, node, mode);
1356 }
1357
1358 static ir_node *get_global_var_address(dbg_info *const dbgi,
1359                                        const entity_t *const entity)
1360 {
1361         assert(entity->kind == ENTITY_VARIABLE);
1362         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1363
1364         ir_entity *const irentity = entity->variable.v.entity;
1365         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1366                 case STORAGE_CLASS_THREAD:
1367                 case STORAGE_CLASS_THREAD_EXTERN:
1368                 case STORAGE_CLASS_THREAD_STATIC: {
1369                         ir_node *const no_mem = new_NoMem();
1370                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1371                         return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1372                 }
1373
1374                 default:
1375                         return create_symconst(dbgi, mode_P_data, irentity);
1376         }
1377 }
1378
1379 /**
1380  * Returns the correct base address depending on whether it is a parameter or a
1381  * normal local variable.
1382  */
1383 static ir_node *get_local_frame(ir_entity *const ent)
1384 {
1385         ir_graph      *const irg   = current_ir_graph;
1386         const ir_type *const owner = get_entity_owner(ent);
1387         if (owner == get_irg_frame_type(irg)) {
1388                 return get_irg_frame(irg);
1389         } else {
1390                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1391                 return get_irg_value_param_base(irg);
1392         }
1393 }
1394
1395 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1396 {
1397         ir_mode *value_mode = get_irn_mode(value);
1398
1399         if (value_mode == dest_mode || is_Bad(value))
1400                 return value;
1401
1402         if (dest_mode == mode_b) {
1403                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1404                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1405                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1406                 return proj;
1407         }
1408
1409         return new_d_Conv(dbgi, value, dest_mode);
1410 }
1411
1412 /**
1413  * Keep all memory edges of the given block.
1414  */
1415 static void keep_all_memory(ir_node *block) {
1416         ir_node *old = get_cur_block();
1417
1418         set_cur_block(block);
1419         keep_alive(get_store());
1420         /* TODO: keep all memory edges from restricted pointers */
1421         set_cur_block(old);
1422 }
1423
1424 static ir_node *reference_expression_enum_value_to_firm(
1425                 const reference_expression_t *ref)
1426 {
1427         entity_t *entity = ref->entity;
1428         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1429         /* make sure the type is constructed */
1430         (void) get_ir_type(type);
1431
1432         ir_mode *const mode = get_ir_mode(type);
1433         return new_Const(mode, entity->enum_value.tv);
1434 }
1435
1436 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1437 {
1438         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1439         entity_t *entity = ref->entity;
1440         assert(is_declaration(entity));
1441         type_t   *type   = skip_typeref(entity->declaration.type);
1442
1443         /* make sure the type is constructed */
1444         (void) get_ir_type(type);
1445
1446         switch ((declaration_kind_t) entity->declaration.kind) {
1447         case DECLARATION_KIND_UNKNOWN:
1448                 break;
1449
1450         case DECLARATION_KIND_LOCAL_VARIABLE: {
1451                 ir_mode *const mode = get_ir_mode(type);
1452                 return get_value(entity->variable.v.value_number, mode);
1453         }
1454         case DECLARATION_KIND_FUNCTION: {
1455                 ir_mode *const mode = get_ir_mode(type);
1456                 return create_symconst(dbgi, mode, entity->function.entity);
1457         }
1458         case DECLARATION_KIND_INNER_FUNCTION: {
1459                 ir_mode *const mode = get_ir_mode(type);
1460                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1461                         /* inner function not using the closure */
1462                         return create_symconst(dbgi, mode, entity->function.entity);
1463                 } else {
1464                         /* TODO: need trampoline here */
1465                         panic("Trampoline code not implemented");
1466                         return create_symconst(dbgi, mode, entity->function.entity);
1467                 }
1468         }
1469         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1470                 ir_node *const addr = get_global_var_address(dbgi, entity);
1471                 return deref_address(dbgi, entity->declaration.type, addr);
1472         }
1473
1474         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1475                 ir_entity *irentity = entity->variable.v.entity;
1476                 ir_node   *frame    = get_local_frame(irentity);
1477                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1478                 return deref_address(dbgi, entity->declaration.type, sel);
1479         }
1480
1481         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1482                 return entity->variable.v.vla_base;
1483
1484         case DECLARATION_KIND_COMPOUND_MEMBER:
1485                 panic("not implemented reference type");
1486         }
1487
1488         panic("reference to declaration with unknown type found");
1489 }
1490
1491 static ir_node *reference_addr(const reference_expression_t *ref)
1492 {
1493         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1494         entity_t *entity = ref->entity;
1495         assert(is_declaration(entity));
1496
1497         switch((declaration_kind_t) entity->declaration.kind) {
1498         case DECLARATION_KIND_UNKNOWN:
1499                 break;
1500         case DECLARATION_KIND_LOCAL_VARIABLE:
1501                 /* you can store to a local variable (so we don't panic but return NULL
1502                  * as an indicator for no real address) */
1503                 return NULL;
1504         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1505                 ir_node *const addr = get_global_var_address(dbgi, entity);
1506                 return addr;
1507         }
1508         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1509                 ir_entity *irentity = entity->variable.v.entity;
1510                 ir_node   *frame    = get_local_frame(irentity);
1511                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1512
1513                 return sel;
1514         }
1515
1516         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1517                 return entity->variable.v.vla_base;
1518
1519         case DECLARATION_KIND_FUNCTION: {
1520                 type_t  *const type = skip_typeref(entity->declaration.type);
1521                 ir_mode *const mode = get_ir_mode(type);
1522                 return create_symconst(dbgi, mode, entity->function.entity);
1523         }
1524
1525         case DECLARATION_KIND_INNER_FUNCTION:
1526         case DECLARATION_KIND_COMPOUND_MEMBER:
1527                 panic("not implemented reference type");
1528         }
1529
1530         panic("reference to declaration with unknown type found");
1531 }
1532
1533 /**
1534  * Transform calls to builtin functions.
1535  */
1536 static ir_node *process_builtin_call(const call_expression_t *call)
1537 {
1538         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1539
1540         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1541         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1542
1543         type_t *type = skip_typeref(builtin->base.type);
1544         assert(is_type_pointer(type));
1545
1546         type_t   *function_type = skip_typeref(type->pointer.points_to);
1547         symbol_t *symbol        = builtin->symbol;
1548
1549         switch(symbol->ID) {
1550         case T___builtin_alloca: {
1551                 if (call->arguments == NULL || call->arguments->next != NULL) {
1552                         panic("invalid number of parameters on __builtin_alloca");
1553                 }
1554                 expression_t *argument = call->arguments->expression;
1555                 ir_node      *size     = expression_to_firm(argument);
1556
1557                 ir_node *store  = get_store();
1558                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1559                                               stack_alloc);
1560                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1561                 set_store(proj_m);
1562                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1563
1564                 return res;
1565         }
1566
1567         case T___builtin_huge_val:
1568         case T___builtin_inf:
1569         case T___builtin_inff:
1570         case T___builtin_infl: {
1571                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1572                 tarval  *tv   = get_mode_infinite(mode);
1573                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1574                 return   res;
1575         }
1576         case T___builtin_nan:
1577         case T___builtin_nanf:
1578         case T___builtin_nanl: {
1579                 /* Ignore string for now... */
1580                 assert(is_type_function(function_type));
1581                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1582                 tarval  *tv   = get_mode_NAN(mode);
1583                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1584                 return res;
1585         }
1586         case T___builtin_va_end:
1587                 return NULL;
1588         default:
1589                 panic("Unsupported builtin found\n");
1590         }
1591 }
1592
1593 /**
1594  * Transform a call expression.
1595  * Handles some special cases, like alloca() calls, which must be resolved
1596  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1597  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1598  * handled right...
1599  */
1600 static ir_node *call_expression_to_firm(const call_expression_t *call)
1601 {
1602         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1603         assert(get_cur_block() != NULL);
1604
1605         expression_t *function = call->function;
1606         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1607                 return process_builtin_call(call);
1608         }
1609         if (function->kind == EXPR_REFERENCE) {
1610                 const reference_expression_t *ref    = &function->reference;
1611                 entity_t                     *entity = ref->entity;
1612
1613                 if (entity->kind == ENTITY_FUNCTION
1614                                 && entity->function.entity == rts_entities[rts_alloca]) {
1615                         /* handle alloca() call */
1616                         expression_t *argument = call->arguments->expression;
1617                         ir_node      *size     = expression_to_firm(argument);
1618
1619                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1620
1621                         ir_node  *store  = get_store();
1622                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1623                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1624                                                        stack_alloc);
1625                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1626                         set_store(proj_m);
1627                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1628
1629                         return res;
1630                 }
1631         }
1632         ir_node *callee = expression_to_firm(function);
1633
1634         type_t *type = skip_typeref(function->base.type);
1635         assert(is_type_pointer(type));
1636         pointer_type_t *pointer_type = &type->pointer;
1637         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1638         assert(is_type_function(points_to));
1639         function_type_t *function_type = &points_to->function;
1640
1641         int      n_parameters = 0;
1642         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1643         ir_type *new_method_type = NULL;
1644         if (function_type->variadic || function_type->unspecified_parameters) {
1645                 const call_argument_t *argument = call->arguments;
1646                 for ( ; argument != NULL; argument = argument->next) {
1647                         ++n_parameters;
1648                 }
1649
1650                 /* we need to construct a new method type matching the call
1651                  * arguments... */
1652                 int n_res       = get_method_n_ress(ir_method_type);
1653                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1654                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1655                                                     n_parameters, n_res, dbgi);
1656                 set_method_calling_convention(new_method_type,
1657                                get_method_calling_convention(ir_method_type));
1658                 set_method_additional_properties(new_method_type,
1659                                get_method_additional_properties(ir_method_type));
1660                 set_method_variadicity(new_method_type,
1661                                        get_method_variadicity(ir_method_type));
1662
1663                 for (int i = 0; i < n_res; ++i) {
1664                         set_method_res_type(new_method_type, i,
1665                                             get_method_res_type(ir_method_type, i));
1666                 }
1667                 argument = call->arguments;
1668                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1669                         expression_t *expression = argument->expression;
1670                         ir_type      *irtype     = get_ir_type(expression->base.type);
1671                         set_method_param_type(new_method_type, i, irtype);
1672                 }
1673                 ir_method_type = new_method_type;
1674         } else {
1675                 n_parameters = get_method_n_params(ir_method_type);
1676         }
1677
1678         ir_node *in[n_parameters];
1679
1680         const call_argument_t *argument = call->arguments;
1681         for (int n = 0; n < n_parameters; ++n) {
1682                 expression_t *expression = argument->expression;
1683                 ir_node      *arg_node   = expression_to_firm(expression);
1684
1685                 arg_node = do_strict_conv(dbgi, arg_node);
1686
1687                 in[n] = arg_node;
1688
1689                 argument = argument->next;
1690         }
1691
1692         ir_node  *store = get_store();
1693         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1694                                      ir_method_type);
1695         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1696         set_store(mem);
1697
1698         type_t  *return_type = skip_typeref(function_type->return_type);
1699         ir_node *result      = NULL;
1700
1701         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1702                 ir_mode *mode;
1703                 if (is_type_scalar(return_type)) {
1704                         mode = get_ir_mode(return_type);
1705                 } else {
1706                         mode = mode_P_data;
1707                 }
1708                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1709                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1710         }
1711
1712         if (function->kind == EXPR_REFERENCE &&
1713             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1714                 /* A dead end:  Keep the Call and the Block.  Also place all further
1715                  * nodes into a new and unreachable block. */
1716                 keep_alive(node);
1717                 keep_alive(get_cur_block());
1718                 new_Block(0, NULL);
1719         }
1720
1721         return result;
1722 }
1723
1724 static void statement_to_firm(statement_t *statement);
1725 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1726
1727 static ir_node *expression_to_addr(const expression_t *expression);
1728 static ir_node *create_condition_evaluation(const expression_t *expression,
1729                                             ir_node *true_block,
1730                                             ir_node *false_block);
1731
1732 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1733                          ir_node *value)
1734 {
1735         value = do_strict_conv(dbgi, value);
1736
1737         ir_node *memory = get_store();
1738
1739         if (is_type_scalar(type)) {
1740                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1741                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1742                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1743                         set_Store_volatility(store, volatility_is_volatile);
1744                 set_store(store_mem);
1745         } else {
1746                 ir_type *irtype    = get_ir_type(type);
1747                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1748                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1749                 set_store(copyb_mem);
1750         }
1751 }
1752
1753 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1754 {
1755         tarval *all_one   = get_mode_all_one(mode);
1756         int     mode_size = get_mode_size_bits(mode);
1757
1758         assert(offset >= 0);
1759         assert(size   >= 0);
1760         assert(offset + size <= mode_size);
1761         if (size == mode_size) {
1762                 return all_one;
1763         }
1764
1765         long    shiftr    = get_mode_size_bits(mode) - size;
1766         long    shiftl    = offset;
1767         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1768         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1769         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1770         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1771
1772         return mask1;
1773 }
1774
1775 static void bitfield_store_to_firm(dbg_info *dbgi,
1776                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1777 {
1778         ir_type *entity_type = get_entity_type(entity);
1779         ir_type *base_type   = get_primitive_base_type(entity_type);
1780         assert(base_type != NULL);
1781         ir_mode *mode        = get_type_mode(base_type);
1782
1783         value = create_conv(dbgi, value, mode);
1784
1785         /* kill upper bits of value and shift to right position */
1786         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1787         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1788
1789         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1790         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1791         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1792         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1793         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1794         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1795
1796         /* load current value */
1797         ir_node  *mem             = get_store();
1798         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1799         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1800         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1801         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1802         tarval   *inv_mask        = tarval_not(shift_mask);
1803         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1804         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1805
1806         /* construct new value and store */
1807         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1808         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1809         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1810         set_store(store_mem);
1811
1812         if (set_volatile) {
1813                 set_Load_volatility(load, volatility_is_volatile);
1814                 set_Store_volatility(store, volatility_is_volatile);
1815         }
1816 }
1817
1818 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1819                 ir_node *addr)
1820 {
1821         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1822         type_t   *type     = expression->base.type;
1823         ir_mode  *mode     = get_ir_mode(type);
1824         ir_node  *mem      = get_store();
1825         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1826         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1827         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1828
1829         load_res           = create_conv(dbgi, load_res, mode_int);
1830
1831         set_store(load_mem);
1832
1833         /* kill upper bits */
1834         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1835         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1836         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1837         ir_type   *entity_type  = get_entity_type(entity);
1838         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1839         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1840         assert(shift_bitsl >= 0);
1841         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1842         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1843         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1844
1845         long       shift_bitsr  = bitoffset + shift_bitsl;
1846         assert(shift_bitsr <= (long) machine_size);
1847         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1848         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1849         ir_node   *shiftr;
1850         if (mode_is_signed(mode)) {
1851                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1852         } else {
1853                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1854         }
1855
1856         return create_conv(dbgi, shiftr, mode);
1857 }
1858
1859 /* make sure the selected compound type is constructed */
1860 static void construct_select_compound(const select_expression_t *expression)
1861 {
1862         type_t *type = skip_typeref(expression->compound->base.type);
1863         if (is_type_pointer(type)) {
1864                 type = type->pointer.points_to;
1865         }
1866         (void) get_ir_type(type);
1867 }
1868
1869 static void set_value_for_expression_addr(const expression_t *expression,
1870                                           ir_node *value, ir_node *addr)
1871 {
1872         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1873         value          = do_strict_conv(dbgi, value);
1874
1875         if (expression->kind == EXPR_REFERENCE) {
1876                 const reference_expression_t *ref = &expression->reference;
1877
1878                 entity_t *entity = ref->entity;
1879                 assert(is_declaration(entity));
1880                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1881                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1882                         set_value(entity->variable.v.value_number, value);
1883                         return;
1884                 }
1885         }
1886
1887         if (addr == NULL)
1888                 addr = expression_to_addr(expression);
1889
1890         type_t *type = skip_typeref(expression->base.type);
1891
1892         if (expression->kind == EXPR_SELECT) {
1893                 const select_expression_t *select = &expression->select;
1894
1895                 construct_select_compound(select);
1896
1897                 entity_t *entity = select->compound_entry;
1898                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1899                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1900                         ir_entity *irentity = entity->compound_member.entity;
1901                         bool       set_volatile
1902                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1903                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1904                         return;
1905                 }
1906         }
1907
1908         assign_value(dbgi, addr, type, value);
1909 }
1910
1911 static void set_value_for_expression(const expression_t *expression,
1912                                      ir_node *value)
1913 {
1914         set_value_for_expression_addr(expression, value, NULL);
1915 }
1916
1917 static ir_node *get_value_from_lvalue(const expression_t *expression,
1918                                       ir_node *addr)
1919 {
1920         if (expression->kind == EXPR_REFERENCE) {
1921                 const reference_expression_t *ref = &expression->reference;
1922
1923                 entity_t *entity = ref->entity;
1924                 assert(entity->kind == ENTITY_VARIABLE);
1925                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1926                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1927                         assert(addr == NULL);
1928                         ir_mode *mode = get_ir_mode(expression->base.type);
1929                         return get_value(entity->variable.v.value_number, mode);
1930                 }
1931         }
1932
1933         assert(addr != NULL);
1934         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1935
1936         ir_node *value;
1937         if (expression->kind == EXPR_SELECT &&
1938             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1939             construct_select_compound(&expression->select);
1940                 value = bitfield_extract_to_firm(&expression->select, addr);
1941         } else {
1942                 value = deref_address(dbgi, expression->base.type, addr);
1943         }
1944
1945         return value;
1946 }
1947
1948
1949 static ir_node *create_incdec(const unary_expression_t *expression)
1950 {
1951         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1952         const expression_t *value_expr = expression->value;
1953         ir_node            *addr       = expression_to_addr(value_expr);
1954         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1955
1956         type_t  *type = skip_typeref(expression->base.type);
1957         ir_mode *mode = get_ir_mode(expression->base.type);
1958
1959         ir_node *offset;
1960         if (is_type_pointer(type)) {
1961                 pointer_type_t *pointer_type = &type->pointer;
1962                 offset                       = get_type_size(pointer_type->points_to);
1963         } else {
1964                 assert(is_type_arithmetic(type));
1965                 offset = new_Const(mode, get_mode_one(mode));
1966         }
1967
1968         ir_node *result;
1969         ir_node *store_value;
1970         switch(expression->base.kind) {
1971         case EXPR_UNARY_POSTFIX_INCREMENT:
1972                 result      = value;
1973                 store_value = new_d_Add(dbgi, value, offset, mode);
1974                 break;
1975         case EXPR_UNARY_POSTFIX_DECREMENT:
1976                 result      = value;
1977                 store_value = new_d_Sub(dbgi, value, offset, mode);
1978                 break;
1979         case EXPR_UNARY_PREFIX_INCREMENT:
1980                 result      = new_d_Add(dbgi, value, offset, mode);
1981                 store_value = result;
1982                 break;
1983         case EXPR_UNARY_PREFIX_DECREMENT:
1984                 result      = new_d_Sub(dbgi, value, offset, mode);
1985                 store_value = result;
1986                 break;
1987         default:
1988                 panic("no incdec expr in create_incdec");
1989         }
1990
1991         set_value_for_expression_addr(value_expr, store_value, addr);
1992
1993         return result;
1994 }
1995
1996 static bool is_local_variable(expression_t *expression)
1997 {
1998         if (expression->kind != EXPR_REFERENCE)
1999                 return false;
2000         reference_expression_t *ref_expr = &expression->reference;
2001         entity_t               *entity   = ref_expr->entity;
2002         if (entity->kind != ENTITY_VARIABLE)
2003                 return false;
2004         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2005         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2006 }
2007
2008 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2009 {
2010         switch(kind) {
2011         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2012         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2013         case EXPR_BINARY_NOTEQUAL:
2014                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2015         case EXPR_BINARY_ISLESS:
2016         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2017         case EXPR_BINARY_ISLESSEQUAL:
2018         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2019         case EXPR_BINARY_ISGREATER:
2020         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2021         case EXPR_BINARY_ISGREATEREQUAL:
2022         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2023         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2024
2025         default:
2026                 break;
2027         }
2028         panic("trying to get pn_Cmp from non-comparison binexpr type");
2029 }
2030
2031 /**
2032  * Handle the assume optimizer hint: check if a Confirm
2033  * node can be created.
2034  *
2035  * @param dbi    debug info
2036  * @param expr   the IL assume expression
2037  *
2038  * we support here only some simple cases:
2039  *  - var rel const
2040  *  - const rel val
2041  *  - var rel var
2042  */
2043 static ir_node *handle_assume_compare(dbg_info *dbi,
2044                                       const binary_expression_t *expression)
2045 {
2046         expression_t *op1 = expression->left;
2047         expression_t *op2 = expression->right;
2048         entity_t     *var2, *var = NULL;
2049         ir_node      *res = NULL;
2050         pn_Cmp        cmp_val;
2051
2052         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2053
2054         if (is_local_variable(op1) && is_local_variable(op2)) {
2055         var  = op1->reference.entity;
2056             var2 = op2->reference.entity;
2057
2058                 type_t  *const type = skip_typeref(var->declaration.type);
2059                 ir_mode *const mode = get_ir_mode(type);
2060
2061                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2062                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2063
2064                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2065                 set_value(var2->variable.v.value_number, res);
2066
2067                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2068                 set_value(var->variable.v.value_number, res);
2069
2070                 return res;
2071         }
2072
2073         expression_t *con;
2074         if (is_local_variable(op1) && is_constant_expression(op2)) {
2075                 var = op1->reference.entity;
2076                 con = op2;
2077         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2078                 cmp_val = get_inversed_pnc(cmp_val);
2079                 var = op2->reference.entity;
2080                 con = op1;
2081         }
2082
2083         if (var != NULL) {
2084                 type_t  *const type = skip_typeref(var->declaration.type);
2085                 ir_mode *const mode = get_ir_mode(type);
2086
2087                 res = get_value(var->variable.v.value_number, mode);
2088                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2089                 set_value(var->variable.v.value_number, res);
2090         }
2091         return res;
2092 }
2093
2094 /**
2095  * Handle the assume optimizer hint.
2096  *
2097  * @param dbi    debug info
2098  * @param expr   the IL assume expression
2099  */
2100 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2101         switch(expression->kind) {
2102         case EXPR_BINARY_EQUAL:
2103         case EXPR_BINARY_NOTEQUAL:
2104         case EXPR_BINARY_LESS:
2105         case EXPR_BINARY_LESSEQUAL:
2106         case EXPR_BINARY_GREATER:
2107         case EXPR_BINARY_GREATEREQUAL:
2108                 return handle_assume_compare(dbi, &expression->binary);
2109         default:
2110                 return NULL;
2111         }
2112 }
2113
2114 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2115 {
2116         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2117         type_t   *type = skip_typeref(expression->base.type);
2118
2119         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2120                 return expression_to_addr(expression->value);
2121
2122         const expression_t *value = expression->value;
2123
2124         switch(expression->base.kind) {
2125         case EXPR_UNARY_NEGATE: {
2126                 ir_node *value_node = expression_to_firm(value);
2127                 ir_mode *mode = get_ir_mode(type);
2128                 return new_d_Minus(dbgi, value_node, mode);
2129         }
2130         case EXPR_UNARY_PLUS:
2131                 return expression_to_firm(value);
2132         case EXPR_UNARY_BITWISE_NEGATE: {
2133                 ir_node *value_node = expression_to_firm(value);
2134                 ir_mode *mode = get_ir_mode(type);
2135                 return new_d_Not(dbgi, value_node, mode);
2136         }
2137         case EXPR_UNARY_NOT: {
2138                 ir_node *value_node = _expression_to_firm(value);
2139                 value_node          = create_conv(dbgi, value_node, mode_b);
2140                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2141                 return res;
2142         }
2143         case EXPR_UNARY_DEREFERENCE: {
2144                 ir_node *value_node = expression_to_firm(value);
2145                 type_t  *value_type = skip_typeref(value->base.type);
2146                 assert(is_type_pointer(value_type));
2147                 type_t  *points_to  = value_type->pointer.points_to;
2148                 return deref_address(dbgi, points_to, value_node);
2149         }
2150         case EXPR_UNARY_POSTFIX_INCREMENT:
2151         case EXPR_UNARY_POSTFIX_DECREMENT:
2152         case EXPR_UNARY_PREFIX_INCREMENT:
2153         case EXPR_UNARY_PREFIX_DECREMENT:
2154                 return create_incdec(expression);
2155         case EXPR_UNARY_CAST: {
2156                 ir_node *value_node = expression_to_firm(value);
2157                 if (is_type_scalar(type)) {
2158                         ir_mode *mode = get_ir_mode(type);
2159                         ir_node *node = create_conv(dbgi, value_node, mode);
2160                         node = do_strict_conv(dbgi, node);
2161                         return node;
2162                 } else {
2163                         /* make sure firm type is constructed */
2164                         (void) get_ir_type(type);
2165                         return value_node;
2166                 }
2167         }
2168         case EXPR_UNARY_CAST_IMPLICIT: {
2169                 ir_node *value_node = expression_to_firm(value);
2170                 if (is_type_scalar(type)) {
2171                         ir_mode *mode = get_ir_mode(type);
2172                         return create_conv(dbgi, value_node, mode);
2173                 } else {
2174                         return value_node;
2175                 }
2176         }
2177         case EXPR_UNARY_ASSUME:
2178                 if (firm_opt.confirm)
2179                         return handle_assume(dbgi, value);
2180                 else
2181                         return NULL;
2182
2183         default:
2184                 break;
2185         }
2186         panic("invalid UNEXPR type found");
2187 }
2188
2189 /**
2190  * produces a 0/1 depending of the value of a mode_b node
2191  */
2192 static ir_node *produce_condition_result(const expression_t *expression,
2193                                          dbg_info *dbgi)
2194 {
2195         ir_mode *mode      = get_ir_mode(expression->base.type);
2196         ir_node *cur_block = get_cur_block();
2197
2198         ir_node *one_block = new_immBlock();
2199         ir_node *one       = new_Const(mode, get_mode_one(mode));
2200         ir_node *jmp_one   = new_d_Jmp(dbgi);
2201
2202         ir_node *zero_block = new_immBlock();
2203         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2204         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2205
2206         set_cur_block(cur_block);
2207         create_condition_evaluation(expression, one_block, zero_block);
2208         mature_immBlock(one_block);
2209         mature_immBlock(zero_block);
2210
2211         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2212         new_Block(2, in_cf);
2213
2214         ir_node *in[2] = { one, zero };
2215         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2216
2217         return val;
2218 }
2219
2220 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2221                 ir_node *value, type_t *type)
2222 {
2223         pointer_type_t *const pointer_type = &type->pointer;
2224         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2225         unsigned              elem_size    = get_type_size_const(points_to);
2226
2227         /* gcc extension: allow arithmetic with void * and function * */
2228         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2229             is_type_function(points_to))  {
2230                 elem_size = 1;
2231         }
2232
2233         assert(elem_size >= 1);
2234         if (elem_size == 1)
2235                 return value;
2236
2237         value = create_conv(dbgi, value, mode_int);
2238         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2239         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2240         return mul;
2241 }
2242
2243 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2244                           ir_node *left, ir_node *right)
2245 {
2246         ir_mode  *mode;
2247         type_t   *type_left  = skip_typeref(expression->left->base.type);
2248         type_t   *type_right = skip_typeref(expression->right->base.type);
2249
2250         expression_kind_t kind = expression->base.kind;
2251
2252         switch (kind) {
2253         case EXPR_BINARY_SHIFTLEFT:
2254         case EXPR_BINARY_SHIFTRIGHT:
2255         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2256         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2257                 mode  = get_irn_mode(left);
2258                 right = create_conv(dbgi, right, mode_uint);
2259                 break;
2260
2261         case EXPR_BINARY_SUB:
2262                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2263                         const pointer_type_t *const ptr_type = &type_left->pointer;
2264
2265                         mode = get_ir_mode(expression->base.type);
2266                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2267                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2268                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2269                         ir_node *const no_mem    = new_NoMem();
2270                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2271                                                                                                    mode, op_pin_state_floats);
2272                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2273                 }
2274                 /* fallthrough */
2275         case EXPR_BINARY_SUB_ASSIGN:
2276                 if (is_type_pointer(type_left)) {
2277                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2278                         mode  = get_ir_mode(type_left);
2279                         break;
2280                 }
2281                 goto normal_node;
2282
2283         case EXPR_BINARY_ADD:
2284         case EXPR_BINARY_ADD_ASSIGN:
2285                 if (is_type_pointer(type_left)) {
2286                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2287                         mode  = get_ir_mode(type_left);
2288                         break;
2289                 } else if (is_type_pointer(type_right)) {
2290                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2291                         mode  = get_ir_mode(type_right);
2292                         break;
2293                 }
2294                 goto normal_node;
2295
2296         default:
2297 normal_node:
2298                 mode = get_irn_mode(right);
2299                 left = create_conv(dbgi, left, mode);
2300                 break;
2301         }
2302
2303         switch (kind) {
2304         case EXPR_BINARY_ADD_ASSIGN:
2305         case EXPR_BINARY_ADD:
2306                 return new_d_Add(dbgi, left, right, mode);
2307         case EXPR_BINARY_SUB_ASSIGN:
2308         case EXPR_BINARY_SUB:
2309                 return new_d_Sub(dbgi, left, right, mode);
2310         case EXPR_BINARY_MUL_ASSIGN:
2311         case EXPR_BINARY_MUL:
2312                 return new_d_Mul(dbgi, left, right, mode);
2313         case EXPR_BINARY_BITWISE_AND:
2314         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2315                 return new_d_And(dbgi, left, right, mode);
2316         case EXPR_BINARY_BITWISE_OR:
2317         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2318                 return new_d_Or(dbgi, left, right, mode);
2319         case EXPR_BINARY_BITWISE_XOR:
2320         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2321                 return new_d_Eor(dbgi, left, right, mode);
2322         case EXPR_BINARY_SHIFTLEFT:
2323         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2324                 return new_d_Shl(dbgi, left, right, mode);
2325         case EXPR_BINARY_SHIFTRIGHT:
2326         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2327                 if (mode_is_signed(mode)) {
2328                         return new_d_Shrs(dbgi, left, right, mode);
2329                 } else {
2330                         return new_d_Shr(dbgi, left, right, mode);
2331                 }
2332         case EXPR_BINARY_DIV:
2333         case EXPR_BINARY_DIV_ASSIGN: {
2334                 ir_node *pin = new_Pin(new_NoMem());
2335                 ir_node *op;
2336                 ir_node *res;
2337                 if (mode_is_float(mode)) {
2338                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2339                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2340                 } else {
2341                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2342                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2343                 }
2344                 return res;
2345         }
2346         case EXPR_BINARY_MOD:
2347         case EXPR_BINARY_MOD_ASSIGN: {
2348                 ir_node *pin = new_Pin(new_NoMem());
2349                 assert(!mode_is_float(mode));
2350                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2351                                          op_pin_state_floats);
2352                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2353                 return res;
2354         }
2355         default:
2356                 panic("unexpected expression kind");
2357         }
2358 }
2359
2360 static ir_node *create_lazy_op(const binary_expression_t *expression)
2361 {
2362         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2363         type_t   *type = expression->base.type;
2364         ir_mode  *mode = get_ir_mode(type);
2365
2366         if (is_constant_expression(expression->left)) {
2367                 long val = fold_constant(expression->left);
2368                 expression_kind_t ekind = expression->base.kind;
2369                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2370                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2371                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2372                         return expression_to_firm(expression->right);
2373                 } else {
2374                         return new_Const(mode, get_mode_one(mode));
2375                 }
2376         }
2377
2378         return produce_condition_result((const expression_t*) expression, dbgi);
2379 }
2380
2381 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2382                                             ir_node *right, ir_mode *mode);
2383
2384 static ir_node *create_assign_binop(const binary_expression_t *expression)
2385 {
2386         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2387         const expression_t *left_expr = expression->left;
2388         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2389         ir_node            *right     = expression_to_firm(expression->right);
2390         ir_node            *left_addr = expression_to_addr(left_expr);
2391         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2392         ir_node            *result    = create_op(dbgi, expression, left, right);
2393
2394         result = create_conv(dbgi, result, left_mode);
2395         result = do_strict_conv(dbgi, result);
2396
2397         set_value_for_expression_addr(left_expr, result, left_addr);
2398
2399         return result;
2400 }
2401
2402 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2403 {
2404         expression_kind_t kind = expression->base.kind;
2405
2406         switch(kind) {
2407         case EXPR_BINARY_EQUAL:
2408         case EXPR_BINARY_NOTEQUAL:
2409         case EXPR_BINARY_LESS:
2410         case EXPR_BINARY_LESSEQUAL:
2411         case EXPR_BINARY_GREATER:
2412         case EXPR_BINARY_GREATEREQUAL:
2413         case EXPR_BINARY_ISGREATER:
2414         case EXPR_BINARY_ISGREATEREQUAL:
2415         case EXPR_BINARY_ISLESS:
2416         case EXPR_BINARY_ISLESSEQUAL:
2417         case EXPR_BINARY_ISLESSGREATER:
2418         case EXPR_BINARY_ISUNORDERED: {
2419                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2420                 ir_node *left  = expression_to_firm(expression->left);
2421                 ir_node *right = expression_to_firm(expression->right);
2422                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2423                 long     pnc   = get_pnc(kind, expression->left->base.type);
2424                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2425                 return proj;
2426         }
2427         case EXPR_BINARY_ASSIGN: {
2428                 ir_node *addr  = expression_to_addr(expression->left);
2429                 ir_node *right = expression_to_firm(expression->right);
2430                 set_value_for_expression_addr(expression->left, right, addr);
2431
2432                 return right;
2433         }
2434         case EXPR_BINARY_ADD:
2435         case EXPR_BINARY_SUB:
2436         case EXPR_BINARY_MUL:
2437         case EXPR_BINARY_DIV:
2438         case EXPR_BINARY_MOD:
2439         case EXPR_BINARY_BITWISE_AND:
2440         case EXPR_BINARY_BITWISE_OR:
2441         case EXPR_BINARY_BITWISE_XOR:
2442         case EXPR_BINARY_SHIFTLEFT:
2443         case EXPR_BINARY_SHIFTRIGHT:
2444         {
2445                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2446                 ir_node  *left  = expression_to_firm(expression->left);
2447                 ir_node  *right = expression_to_firm(expression->right);
2448                 return create_op(dbgi, expression, left, right);
2449         }
2450         case EXPR_BINARY_LOGICAL_AND:
2451         case EXPR_BINARY_LOGICAL_OR:
2452                 return create_lazy_op(expression);
2453         case EXPR_BINARY_COMMA:
2454                 /* create side effects of left side */
2455                 (void) expression_to_firm(expression->left);
2456                 return _expression_to_firm(expression->right);
2457
2458         case EXPR_BINARY_ADD_ASSIGN:
2459         case EXPR_BINARY_SUB_ASSIGN:
2460         case EXPR_BINARY_MUL_ASSIGN:
2461         case EXPR_BINARY_MOD_ASSIGN:
2462         case EXPR_BINARY_DIV_ASSIGN:
2463         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2464         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2465         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2466         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2467         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2468                 return create_assign_binop(expression);
2469         case EXPR_BINARY_BUILTIN_EXPECT:
2470                 return _expression_to_firm(expression->left);
2471         default:
2472                 panic("TODO binexpr type");
2473         }
2474 }
2475
2476 static ir_node *array_access_addr(const array_access_expression_t *expression)
2477 {
2478         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2479         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2480         ir_node  *offset    = expression_to_firm(expression->index);
2481
2482         type_t  *offset_type = skip_typeref(expression->index->base.type);
2483         ir_mode *mode;
2484         if (is_type_signed(offset_type)) {
2485                 mode = get_ir_mode(type_ssize_t);
2486         } else {
2487                 mode = get_ir_mode(type_size_t);
2488         }
2489         offset = create_conv(dbgi, offset, mode);
2490
2491         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2492         assert(is_type_pointer(ref_type));
2493         pointer_type_t *pointer_type = &ref_type->pointer;
2494
2495         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2496         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2497         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2498                                              mode);
2499         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2500
2501         return result;
2502 }
2503
2504 static ir_node *array_access_to_firm(
2505                 const array_access_expression_t *expression)
2506 {
2507         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2508         ir_node  *addr   = array_access_addr(expression);
2509         type_t   *type   = revert_automatic_type_conversion(
2510                         (const expression_t*) expression);
2511         type             = skip_typeref(type);
2512
2513         return deref_address(dbgi, type, addr);
2514 }
2515
2516 static long get_offsetof_offset(const offsetof_expression_t *expression)
2517 {
2518         type_t *orig_type = expression->type;
2519         long    offset    = 0;
2520
2521         designator_t *designator = expression->designator;
2522         for ( ; designator != NULL; designator = designator->next) {
2523                 type_t *type = skip_typeref(orig_type);
2524                 /* be sure the type is constructed */
2525                 (void) get_ir_type(type);
2526
2527                 if (designator->symbol != NULL) {
2528                         assert(is_type_compound(type));
2529                         symbol_t *symbol = designator->symbol;
2530
2531                         compound_t *compound = type->compound.compound;
2532                         entity_t   *iter     = compound->members.entities;
2533                         for ( ; iter != NULL; iter = iter->base.next) {
2534                                 if (iter->base.symbol == symbol) {
2535                                         break;
2536                                 }
2537                         }
2538                         assert(iter != NULL);
2539
2540                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2541                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2542                         offset += get_entity_offset(iter->compound_member.entity);
2543
2544                         orig_type = iter->declaration.type;
2545                 } else {
2546                         expression_t *array_index = designator->array_index;
2547                         assert(designator->array_index != NULL);
2548                         assert(is_type_array(type));
2549
2550                         long index         = fold_constant(array_index);
2551                         ir_type *arr_type  = get_ir_type(type);
2552                         ir_type *elem_type = get_array_element_type(arr_type);
2553                         long     elem_size = get_type_size_bytes(elem_type);
2554
2555                         offset += index * elem_size;
2556
2557                         orig_type = type->array.element_type;
2558                 }
2559         }
2560
2561         return offset;
2562 }
2563
2564 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2565 {
2566         ir_mode  *mode   = get_ir_mode(expression->base.type);
2567         long      offset = get_offsetof_offset(expression);
2568         tarval   *tv     = new_tarval_from_long(offset, mode);
2569         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2570
2571         return new_d_Const(dbgi, mode, tv);
2572 }
2573
2574 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2575                                      ir_entity *entity, type_t *type);
2576
2577 static ir_node *compound_literal_to_firm(
2578                 const compound_literal_expression_t *expression)
2579 {
2580         type_t *type = expression->type;
2581
2582         /* create an entity on the stack */
2583         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2584
2585         ident     *const id     = id_unique("CompLit.%u");
2586         ir_type   *const irtype = get_ir_type(type);
2587         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2588         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2589         set_entity_ld_ident(entity, id);
2590
2591         set_entity_variability(entity, variability_uninitialized);
2592
2593         /* create initialisation code */
2594         initializer_t *initializer = expression->initializer;
2595         create_local_initializer(initializer, dbgi, entity, type);
2596
2597         /* create a sel for the compound literal address */
2598         ir_node *frame = get_local_frame(entity);
2599         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2600         return sel;
2601 }
2602
2603 /**
2604  * Transform a sizeof expression into Firm code.
2605  */
2606 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2607 {
2608         type_t *type = expression->type;
2609         if (type == NULL) {
2610                 type = expression->tp_expression->base.type;
2611                 assert(type != NULL);
2612         }
2613
2614         type = skip_typeref(type);
2615         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2616         if (is_type_array(type) && type->array.is_vla
2617                         && expression->tp_expression != NULL) {
2618                 expression_to_firm(expression->tp_expression);
2619         }
2620
2621         return get_type_size(type);
2622 }
2623
2624 /**
2625  * Transform an alignof expression into Firm code.
2626  */
2627 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2628 {
2629         type_t *type = expression->type;
2630         if (type == NULL) {
2631                 /* beware: if expression is a variable reference, return the
2632                    alignment of the variable. */
2633                 const expression_t *tp_expression = expression->tp_expression;
2634                 const entity_t     *entity        = expression_is_variable(tp_expression);
2635                 if (entity != NULL) {
2636                         /* TODO: get the alignment of this variable. */
2637                         (void) entity;
2638                 }
2639                 type = tp_expression->base.type;
2640                 assert(type != NULL);
2641         }
2642
2643         ir_mode *const mode = get_ir_mode(expression->base.type);
2644         symconst_symbol sym;
2645         sym.type_p = get_ir_type(type);
2646         return new_SymConst(mode, sym, symconst_type_align);
2647 }
2648
2649 static void init_ir_types(void);
2650
2651 long fold_constant(const expression_t *expression)
2652 {
2653         assert(is_type_valid(skip_typeref(expression->base.type)));
2654
2655         bool constant_folding_old = constant_folding;
2656         constant_folding = true;
2657
2658         init_ir_types();
2659
2660         assert(is_constant_expression(expression));
2661
2662         ir_graph *old_current_ir_graph = current_ir_graph;
2663         if (current_ir_graph == NULL) {
2664                 current_ir_graph = get_const_code_irg();
2665         }
2666
2667         ir_node *cnst = expression_to_firm(expression);
2668         current_ir_graph = old_current_ir_graph;
2669
2670         if (!is_Const(cnst)) {
2671                 panic("couldn't fold constant\n");
2672         }
2673
2674         tarval *tv = get_Const_tarval(cnst);
2675         if (!tarval_is_long(tv)) {
2676                 panic("result of constant folding is not integer\n");
2677         }
2678
2679         constant_folding = constant_folding_old;
2680
2681         return get_tarval_long(tv);
2682 }
2683
2684 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2685 {
2686         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2687
2688         /* first try to fold a constant condition */
2689         if (is_constant_expression(expression->condition)) {
2690                 long val = fold_constant(expression->condition);
2691                 if (val) {
2692                         expression_t *true_expression = expression->true_expression;
2693                         if (true_expression == NULL)
2694                                 true_expression = expression->condition;
2695                         return expression_to_firm(true_expression);
2696                 } else {
2697                         return expression_to_firm(expression->false_expression);
2698                 }
2699         }
2700
2701         ir_node *cur_block   = get_cur_block();
2702
2703         /* create the true block */
2704         ir_node *true_block  = new_immBlock();
2705
2706         ir_node *true_val = expression->true_expression != NULL ?
2707                 expression_to_firm(expression->true_expression) : NULL;
2708         ir_node *true_jmp = new_Jmp();
2709
2710         /* create the false block */
2711         ir_node *false_block = new_immBlock();
2712
2713         ir_node *false_val = expression_to_firm(expression->false_expression);
2714         ir_node *false_jmp = new_Jmp();
2715
2716         /* create the condition evaluation */
2717         set_cur_block(cur_block);
2718         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2719         if (expression->true_expression == NULL) {
2720                 if (cond_expr != NULL) {
2721                         true_val = cond_expr;
2722                 } else {
2723                         /* Condition ended with a short circuit (&&, ||, !) operation.
2724                          * Generate a "1" as value for the true branch. */
2725                         ir_mode *const mode = mode_Is;
2726                         true_val = new_Const(mode, get_mode_one(mode));
2727                 }
2728         }
2729         mature_immBlock(true_block);
2730         mature_immBlock(false_block);
2731
2732         /* create the common block */
2733         ir_node *in_cf[2] = { true_jmp, false_jmp };
2734         new_Block(2, in_cf);
2735
2736         /* TODO improve static semantics, so either both or no values are NULL */
2737         if (true_val == NULL || false_val == NULL)
2738                 return NULL;
2739
2740         ir_node *in[2] = { true_val, false_val };
2741         ir_mode *mode  = get_irn_mode(true_val);
2742         assert(get_irn_mode(false_val) == mode);
2743         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2744
2745         return val;
2746 }
2747
2748 /**
2749  * Returns an IR-node representing the address of a field.
2750  */
2751 static ir_node *select_addr(const select_expression_t *expression)
2752 {
2753         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2754
2755         construct_select_compound(expression);
2756
2757         ir_node *compound_addr = expression_to_firm(expression->compound);
2758
2759         entity_t *entry = expression->compound_entry;
2760         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2761         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2762         ir_entity *irentity = entry->compound_member.entity;
2763
2764         assert(irentity != NULL);
2765
2766         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2767
2768         return sel;
2769 }
2770
2771 static ir_node *select_to_firm(const select_expression_t *expression)
2772 {
2773         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2774         ir_node  *addr = select_addr(expression);
2775         type_t   *type = revert_automatic_type_conversion(
2776                         (const expression_t*) expression);
2777         type           = skip_typeref(type);
2778
2779         entity_t *entry      = expression->compound_entry;
2780         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2781         type_t   *entry_type = skip_typeref(entry->declaration.type);
2782
2783         if (entry_type->kind == TYPE_BITFIELD) {
2784                 return bitfield_extract_to_firm(expression, addr);
2785         }
2786
2787         return deref_address(dbgi, type, addr);
2788 }
2789
2790 /* Values returned by __builtin_classify_type. */
2791 typedef enum gcc_type_class
2792 {
2793         no_type_class = -1,
2794         void_type_class,
2795         integer_type_class,
2796         char_type_class,
2797         enumeral_type_class,
2798         boolean_type_class,
2799         pointer_type_class,
2800         reference_type_class,
2801         offset_type_class,
2802         real_type_class,
2803         complex_type_class,
2804         function_type_class,
2805         method_type_class,
2806         record_type_class,
2807         union_type_class,
2808         array_type_class,
2809         string_type_class,
2810         set_type_class,
2811         file_type_class,
2812         lang_type_class
2813 } gcc_type_class;
2814
2815 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2816 {
2817         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2818
2819         gcc_type_class tc;
2820         switch (type->kind)
2821         {
2822                 case TYPE_ATOMIC: {
2823                         const atomic_type_t *const atomic_type = &type->atomic;
2824                         switch (atomic_type->akind) {
2825                                 /* should not be reached */
2826                                 case ATOMIC_TYPE_INVALID:
2827                                         tc = no_type_class;
2828                                         goto make_const;
2829
2830                                 /* gcc cannot do that */
2831                                 case ATOMIC_TYPE_VOID:
2832                                         tc = void_type_class;
2833                                         goto make_const;
2834
2835                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2836                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2837                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2838                                 case ATOMIC_TYPE_SHORT:
2839                                 case ATOMIC_TYPE_USHORT:
2840                                 case ATOMIC_TYPE_INT:
2841                                 case ATOMIC_TYPE_UINT:
2842                                 case ATOMIC_TYPE_LONG:
2843                                 case ATOMIC_TYPE_ULONG:
2844                                 case ATOMIC_TYPE_LONGLONG:
2845                                 case ATOMIC_TYPE_ULONGLONG:
2846                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2847                                         tc = integer_type_class;
2848                                         goto make_const;
2849
2850                                 case ATOMIC_TYPE_FLOAT:
2851                                 case ATOMIC_TYPE_DOUBLE:
2852                                 case ATOMIC_TYPE_LONG_DOUBLE:
2853                                         tc = real_type_class;
2854                                         goto make_const;
2855                         }
2856                         panic("Unexpected atomic type in classify_type_to_firm().");
2857                 }
2858
2859                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2860                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2861                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2862                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2863                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2864                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2865                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2866                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2867
2868                 /* gcc handles this as integer */
2869                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2870
2871                 case TYPE_BUILTIN:
2872                 /* typedef/typeof should be skipped already */
2873                 case TYPE_TYPEDEF:
2874                 case TYPE_TYPEOF:
2875                 case TYPE_INVALID:
2876                 case TYPE_ERROR:
2877                         break;
2878         }
2879         panic("unexpected TYPE classify_type_to_firm().");
2880
2881 make_const: ;
2882         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2883         ir_mode  *const mode = mode_int;
2884         tarval   *const tv   = new_tarval_from_long(tc, mode);
2885         return new_d_Const(dbgi, mode, tv);
2886 }
2887
2888 static ir_node *function_name_to_firm(
2889                 const funcname_expression_t *const expr)
2890 {
2891         switch(expr->kind) {
2892         case FUNCNAME_FUNCTION:
2893         case FUNCNAME_PRETTY_FUNCTION:
2894         case FUNCNAME_FUNCDNAME:
2895                 if (current_function_name == NULL) {
2896                         const source_position_t *const src_pos = &expr->base.source_position;
2897                         const char    *name  = current_function_entity->base.symbol->string;
2898                         const string_t string = { name, strlen(name) + 1 };
2899                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2900                 }
2901                 return current_function_name;
2902         case FUNCNAME_FUNCSIG:
2903                 if (current_funcsig == NULL) {
2904                         const source_position_t *const src_pos = &expr->base.source_position;
2905                         ir_entity *ent = get_irg_entity(current_ir_graph);
2906                         const char *const name = get_entity_ld_name(ent);
2907                         const string_t string = { name, strlen(name) + 1 };
2908                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2909                 }
2910                 return current_funcsig;
2911         }
2912         panic("Unsupported function name");
2913 }
2914
2915 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2916 {
2917         statement_t *statement = expr->statement;
2918
2919         assert(statement->kind == STATEMENT_COMPOUND);
2920         return compound_statement_to_firm(&statement->compound);
2921 }
2922
2923 static ir_node *va_start_expression_to_firm(
2924         const va_start_expression_t *const expr)
2925 {
2926         type_t    *const type        = current_function_entity->declaration.type;
2927         ir_type   *const method_type = get_ir_type(type);
2928         int        const n           = get_method_n_params(method_type) - 1;
2929         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2930         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2931         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2932         ir_node   *const no_mem      = new_NoMem();
2933         ir_node   *const arg_sel     =
2934                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2935
2936         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2937         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2938         set_value_for_expression(expr->ap, add);
2939
2940         return NULL;
2941 }
2942
2943 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2944 {
2945         type_t       *const type    = expr->base.type;
2946         expression_t *const ap_expr = expr->ap;
2947         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2948         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2949         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2950         ir_node      *const res     = deref_address(dbgi, type, ap);
2951
2952         ir_node      *const cnst    = get_type_size(expr->base.type);
2953         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2954
2955         set_value_for_expression_addr(ap_expr, add, ap_addr);
2956
2957         return res;
2958 }
2959
2960 static ir_node *dereference_addr(const unary_expression_t *const expression)
2961 {
2962         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2963         return expression_to_firm(expression->value);
2964 }
2965
2966 /**
2967  * Returns a IR-node representing an lvalue of the given expression.
2968  */
2969 static ir_node *expression_to_addr(const expression_t *expression)
2970 {
2971         switch(expression->kind) {
2972         case EXPR_REFERENCE:
2973                 return reference_addr(&expression->reference);
2974         case EXPR_ARRAY_ACCESS:
2975                 return array_access_addr(&expression->array_access);
2976         case EXPR_SELECT:
2977                 return select_addr(&expression->select);
2978         case EXPR_CALL:
2979                 return call_expression_to_firm(&expression->call);
2980         case EXPR_UNARY_DEREFERENCE: {
2981                 return dereference_addr(&expression->unary);
2982         }
2983         default:
2984                 break;
2985         }
2986         panic("trying to get address of non-lvalue");
2987 }
2988
2989 static ir_node *builtin_constant_to_firm(
2990                 const builtin_constant_expression_t *expression)
2991 {
2992         ir_mode *mode = get_ir_mode(expression->base.type);
2993         long     v;
2994
2995         if (is_constant_expression(expression->value)) {
2996                 v = 1;
2997         } else {
2998                 v = 0;
2999         }
3000         return new_Const_long(mode, v);
3001 }
3002
3003 static ir_node *builtin_prefetch_to_firm(
3004                 const builtin_prefetch_expression_t *expression)
3005 {
3006         ir_node *adr = expression_to_firm(expression->adr);
3007         /* no Firm support for prefetch yet */
3008         (void) adr;
3009         return NULL;
3010 }
3011
3012 static ir_node *get_label_block(label_t *label)
3013 {
3014         if (label->block != NULL)
3015                 return label->block;
3016
3017         /* beware: might be called from create initializer with current_ir_graph
3018          * set to const_code_irg. */
3019         ir_graph *rem    = current_ir_graph;
3020         current_ir_graph = current_function;
3021
3022         ir_node *old_cur_block = get_cur_block();
3023         ir_node *block         = new_immBlock();
3024         set_cur_block(old_cur_block);
3025
3026         label->block = block;
3027
3028         ARR_APP1(label_t *, all_labels, label);
3029
3030         current_ir_graph = rem;
3031         return block;
3032 }
3033
3034 /**
3035  * Pointer to a label.  This is used for the
3036  * GNU address-of-label extension.
3037  */
3038 static ir_node *label_address_to_firm(
3039                 const label_address_expression_t *label)
3040 {
3041         ir_node    *block = get_label_block(label->label);
3042         ir_label_t  nr    = get_Block_label(block);
3043
3044         if (nr == 0) {
3045                 nr = get_irp_next_label_nr();
3046                 set_Block_label(block, nr);
3047         }
3048         symconst_symbol value;
3049         value.label = nr;
3050         return new_SymConst(mode_P_code, value, symconst_label);
3051 }
3052
3053 /**
3054  * creates firm nodes for an expression. The difference between this function
3055  * and expression_to_firm is, that this version might produce mode_b nodes
3056  * instead of mode_Is.
3057  */
3058 static ir_node *_expression_to_firm(const expression_t *expression)
3059 {
3060 #ifndef NDEBUG
3061         if (!constant_folding) {
3062                 assert(!expression->base.transformed);
3063                 ((expression_t*) expression)->base.transformed = true;
3064         }
3065 #endif
3066
3067         switch (expression->kind) {
3068         case EXPR_CHARACTER_CONSTANT:
3069                 return character_constant_to_firm(&expression->conste);
3070         case EXPR_WIDE_CHARACTER_CONSTANT:
3071                 return wide_character_constant_to_firm(&expression->conste);
3072         case EXPR_CONST:
3073                 return const_to_firm(&expression->conste);
3074         case EXPR_STRING_LITERAL:
3075                 return string_literal_to_firm(&expression->string);
3076         case EXPR_WIDE_STRING_LITERAL:
3077                 return wide_string_literal_to_firm(&expression->wide_string);
3078         case EXPR_REFERENCE:
3079                 return reference_expression_to_firm(&expression->reference);
3080         case EXPR_REFERENCE_ENUM_VALUE:
3081                 return reference_expression_enum_value_to_firm(&expression->reference);
3082         case EXPR_CALL:
3083                 return call_expression_to_firm(&expression->call);
3084         EXPR_UNARY_CASES
3085                 return unary_expression_to_firm(&expression->unary);
3086         EXPR_BINARY_CASES
3087                 return binary_expression_to_firm(&expression->binary);
3088         case EXPR_ARRAY_ACCESS:
3089                 return array_access_to_firm(&expression->array_access);
3090         case EXPR_SIZEOF:
3091                 return sizeof_to_firm(&expression->typeprop);
3092         case EXPR_ALIGNOF:
3093                 return alignof_to_firm(&expression->typeprop);
3094         case EXPR_CONDITIONAL:
3095                 return conditional_to_firm(&expression->conditional);
3096         case EXPR_SELECT:
3097                 return select_to_firm(&expression->select);
3098         case EXPR_CLASSIFY_TYPE:
3099                 return classify_type_to_firm(&expression->classify_type);
3100         case EXPR_FUNCNAME:
3101                 return function_name_to_firm(&expression->funcname);
3102         case EXPR_STATEMENT:
3103                 return statement_expression_to_firm(&expression->statement);
3104         case EXPR_VA_START:
3105                 return va_start_expression_to_firm(&expression->va_starte);
3106         case EXPR_VA_ARG:
3107                 return va_arg_expression_to_firm(&expression->va_arge);
3108         case EXPR_BUILTIN_SYMBOL:
3109                 panic("unimplemented expression found");
3110         case EXPR_BUILTIN_CONSTANT_P:
3111                 return builtin_constant_to_firm(&expression->builtin_constant);
3112         case EXPR_BUILTIN_PREFETCH:
3113                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3114         case EXPR_OFFSETOF:
3115                 return offsetof_to_firm(&expression->offsetofe);
3116         case EXPR_COMPOUND_LITERAL:
3117                 return compound_literal_to_firm(&expression->compound_literal);
3118         case EXPR_LABEL_ADDRESS:
3119                 return label_address_to_firm(&expression->label_address);
3120
3121         case EXPR_UNKNOWN:
3122         case EXPR_INVALID:
3123                 break;
3124         }
3125         panic("invalid expression found");
3126 }
3127
3128 static bool produces_mode_b(const expression_t *expression)
3129 {
3130         switch (expression->kind) {
3131         case EXPR_BINARY_EQUAL:
3132         case EXPR_BINARY_NOTEQUAL:
3133         case EXPR_BINARY_LESS:
3134         case EXPR_BINARY_LESSEQUAL:
3135         case EXPR_BINARY_GREATER:
3136         case EXPR_BINARY_GREATEREQUAL:
3137         case EXPR_BINARY_ISGREATER:
3138         case EXPR_BINARY_ISGREATEREQUAL:
3139         case EXPR_BINARY_ISLESS:
3140         case EXPR_BINARY_ISLESSEQUAL:
3141         case EXPR_BINARY_ISLESSGREATER:
3142         case EXPR_BINARY_ISUNORDERED:
3143         case EXPR_UNARY_NOT:
3144                 return true;
3145
3146         case EXPR_BINARY_BUILTIN_EXPECT:
3147                 return produces_mode_b(expression->binary.left);
3148         case EXPR_BINARY_COMMA:
3149                 return produces_mode_b(expression->binary.right);
3150
3151         default:
3152                 return false;
3153         }
3154 }
3155
3156 static ir_node *expression_to_firm(const expression_t *expression)
3157 {
3158         if (!produces_mode_b(expression)) {
3159                 ir_node *res = _expression_to_firm(expression);
3160                 assert(res == NULL || get_irn_mode(res) != mode_b);
3161                 return res;
3162         }
3163
3164         if (is_constant_expression(expression)) {
3165                 ir_node *res  = _expression_to_firm(expression);
3166                 ir_mode *mode = get_ir_mode(expression->base.type);
3167                 assert(is_Const(res));
3168                 if (is_Const_null(res)) {
3169                         return new_Const_long(mode, 0);
3170                 } else {
3171                         return new_Const_long(mode, 1);
3172                 }
3173         }
3174
3175         /* we have to produce a 0/1 from the mode_b expression */
3176         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3177         return produce_condition_result(expression, dbgi);
3178 }
3179
3180 /**
3181  * create a short-circuit expression evaluation that tries to construct
3182  * efficient control flow structures for &&, || and ! expressions
3183  */
3184 static ir_node *create_condition_evaluation(const expression_t *expression,
3185                                             ir_node *true_block,
3186                                             ir_node *false_block)
3187 {
3188         switch(expression->kind) {
3189         case EXPR_UNARY_NOT: {
3190                 const unary_expression_t *unary_expression = &expression->unary;
3191                 create_condition_evaluation(unary_expression->value, false_block,
3192                                             true_block);
3193                 return NULL;
3194         }
3195         case EXPR_BINARY_LOGICAL_AND: {
3196                 const binary_expression_t *binary_expression = &expression->binary;
3197
3198                 ir_node *cur_block   = get_cur_block();
3199                 ir_node *extra_block = new_immBlock();
3200                 set_cur_block(cur_block);
3201                 create_condition_evaluation(binary_expression->left, extra_block,
3202                                             false_block);
3203                 mature_immBlock(extra_block);
3204                 set_cur_block(extra_block);
3205                 create_condition_evaluation(binary_expression->right, true_block,
3206                                             false_block);
3207                 return NULL;
3208         }
3209         case EXPR_BINARY_LOGICAL_OR: {
3210                 const binary_expression_t *binary_expression = &expression->binary;
3211
3212                 ir_node *cur_block   = get_cur_block();
3213                 ir_node *extra_block = new_immBlock();
3214                 set_cur_block(cur_block);
3215                 create_condition_evaluation(binary_expression->left, true_block,
3216                                             extra_block);
3217                 mature_immBlock(extra_block);
3218                 set_cur_block(extra_block);
3219                 create_condition_evaluation(binary_expression->right, true_block,
3220                                             false_block);
3221                 return NULL;
3222         }
3223         default:
3224                 break;
3225         }
3226
3227         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3228         ir_node  *cond_expr  = _expression_to_firm(expression);
3229         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3230         ir_node  *cond       = new_d_Cond(dbgi, condition);
3231         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3232         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3233
3234         /* set branch prediction info based on __builtin_expect */
3235         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3236                 long               cnst = fold_constant(expression->binary.right);
3237                 cond_jmp_predicate pred;
3238
3239                 if (cnst == 0) {
3240                         pred = COND_JMP_PRED_FALSE;
3241                 } else {
3242                         pred = COND_JMP_PRED_TRUE;
3243                 }
3244                 set_Cond_jmp_pred(cond, pred);
3245         }
3246
3247         add_immBlock_pred(true_block, true_proj);
3248         if (false_block != NULL) {
3249                 add_immBlock_pred(false_block, false_proj);
3250         }
3251
3252         set_cur_block(NULL);
3253         return cond_expr;
3254 }
3255
3256
3257 static void create_variable_entity(entity_t *variable,
3258                                    declaration_kind_t declaration_kind,
3259                                    ir_type *parent_type)
3260 {
3261         assert(variable->kind == ENTITY_VARIABLE);
3262         type_t    *const type     = skip_typeref(variable->declaration.type);
3263         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3264         ir_type   *const irtype   = get_ir_type(type);
3265         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3266         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3267
3268         handle_gnu_attributes_ent(irentity, variable);
3269
3270         variable->declaration.kind  = (unsigned char) declaration_kind;
3271         variable->variable.v.entity = irentity;
3272         set_entity_variability(irentity, variability_uninitialized);
3273         set_entity_ld_ident(irentity, create_ld_ident(irentity, variable));
3274         if (parent_type == get_tls_type())
3275                 set_entity_allocation(irentity, allocation_automatic);
3276         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3277                 set_entity_allocation(irentity, allocation_static);
3278
3279         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3280                 set_entity_volatility(irentity, volatility_is_volatile);
3281         }
3282 }
3283
3284
3285 typedef struct type_path_entry_t type_path_entry_t;
3286 struct type_path_entry_t {
3287         type_t           *type;
3288         ir_initializer_t *initializer;
3289         size_t            index;
3290         entity_t         *compound_entry;
3291 };
3292
3293 typedef struct type_path_t type_path_t;
3294 struct type_path_t {
3295         type_path_entry_t *path;
3296         type_t            *top_type;
3297         bool               invalid;
3298 };
3299
3300 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3301 {
3302         size_t len = ARR_LEN(path->path);
3303
3304         for (size_t i = 0; i < len; ++i) {
3305                 const type_path_entry_t *entry = & path->path[i];
3306
3307                 type_t *type = skip_typeref(entry->type);
3308                 if (is_type_compound(type)) {
3309                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3310                 } else if (is_type_array(type)) {
3311                         fprintf(stderr, "[%zu]", entry->index);
3312                 } else {
3313                         fprintf(stderr, "-INVALID-");
3314                 }
3315         }
3316         fprintf(stderr, "  (");
3317         print_type(path->top_type);
3318         fprintf(stderr, ")");
3319 }
3320
3321 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3322 {
3323         size_t len = ARR_LEN(path->path);
3324         assert(len > 0);
3325         return & path->path[len-1];
3326 }
3327
3328 static type_path_entry_t *append_to_type_path(type_path_t *path)
3329 {
3330         size_t len = ARR_LEN(path->path);
3331         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3332
3333         type_path_entry_t *result = & path->path[len];
3334         memset(result, 0, sizeof(result[0]));
3335         return result;
3336 }
3337
3338 static size_t get_compound_member_count(const compound_type_t *type)
3339 {
3340         compound_t *compound  = type->compound;
3341         size_t      n_members = 0;
3342         entity_t   *member    = compound->members.entities;
3343         for ( ; member != NULL; member = member->base.next) {
3344                 ++n_members;
3345         }
3346
3347         return n_members;
3348 }
3349
3350 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3351 {
3352         type_t *orig_top_type = path->top_type;
3353         type_t *top_type      = skip_typeref(orig_top_type);
3354
3355         assert(is_type_compound(top_type) || is_type_array(top_type));
3356
3357         if (ARR_LEN(path->path) == 0) {
3358                 return NULL;
3359         } else {
3360                 type_path_entry_t *top         = get_type_path_top(path);
3361                 ir_initializer_t  *initializer = top->initializer;
3362                 return get_initializer_compound_value(initializer, top->index);
3363         }
3364 }
3365
3366 static void descend_into_subtype(type_path_t *path)
3367 {
3368         type_t *orig_top_type = path->top_type;
3369         type_t *top_type      = skip_typeref(orig_top_type);
3370
3371         assert(is_type_compound(top_type) || is_type_array(top_type));
3372
3373         ir_initializer_t *initializer = get_initializer_entry(path);
3374
3375         type_path_entry_t *top = append_to_type_path(path);
3376         top->type              = top_type;
3377
3378         size_t len;
3379
3380         if (is_type_compound(top_type)) {
3381                 compound_t *compound = top_type->compound.compound;
3382                 entity_t   *entry    = compound->members.entities;
3383
3384                 top->compound_entry = entry;
3385                 top->index          = 0;
3386                 len                 = get_compound_member_count(&top_type->compound);
3387                 if (entry != NULL) {
3388                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3389                         path->top_type = entry->declaration.type;
3390                 }
3391         } else {
3392                 assert(is_type_array(top_type));
3393                 assert(top_type->array.size > 0);
3394
3395                 top->index     = 0;
3396                 path->top_type = top_type->array.element_type;
3397                 len            = top_type->array.size;
3398         }
3399         if (initializer == NULL
3400                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3401                 initializer = create_initializer_compound(len);
3402                 /* we have to set the entry at the 2nd latest path entry... */
3403                 size_t path_len = ARR_LEN(path->path);
3404                 assert(path_len >= 1);
3405                 if (path_len > 1) {
3406                         type_path_entry_t *entry        = & path->path[path_len-2];
3407                         ir_initializer_t  *tinitializer = entry->initializer;
3408                         set_initializer_compound_value(tinitializer, entry->index,
3409                                                        initializer);
3410                 }
3411         }
3412         top->initializer = initializer;
3413 }
3414
3415 static void ascend_from_subtype(type_path_t *path)
3416 {
3417         type_path_entry_t *top = get_type_path_top(path);
3418
3419         path->top_type = top->type;
3420
3421         size_t len = ARR_LEN(path->path);
3422         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3423 }
3424
3425 static void walk_designator(type_path_t *path, const designator_t *designator)
3426 {
3427         /* designators start at current object type */
3428         ARR_RESIZE(type_path_entry_t, path->path, 1);
3429
3430         for ( ; designator != NULL; designator = designator->next) {
3431                 type_path_entry_t *top         = get_type_path_top(path);
3432                 type_t            *orig_type   = top->type;
3433                 type_t            *type        = skip_typeref(orig_type);
3434
3435                 if (designator->symbol != NULL) {
3436                         assert(is_type_compound(type));
3437                         size_t    index  = 0;
3438                         symbol_t *symbol = designator->symbol;
3439
3440                         compound_t *compound = type->compound.compound;
3441                         entity_t   *iter     = compound->members.entities;
3442                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3443                                 if (iter->base.symbol == symbol) {
3444                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3445                                         break;
3446                                 }
3447                         }
3448                         assert(iter != NULL);
3449
3450                         top->type           = orig_type;
3451                         top->compound_entry = iter;
3452                         top->index          = index;
3453                         orig_type           = iter->declaration.type;
3454                 } else {
3455                         expression_t *array_index = designator->array_index;
3456                         assert(designator->array_index != NULL);
3457                         assert(is_type_array(type));
3458
3459                         long index = fold_constant(array_index);
3460                         assert(index >= 0);
3461 #ifndef NDEBUG
3462                         if (type->array.size_constant) {
3463                                 long array_size = type->array.size;
3464                                 assert(index < array_size);
3465                         }
3466 #endif
3467
3468                         top->type  = orig_type;
3469                         top->index = (size_t) index;
3470                         orig_type  = type->array.element_type;
3471                 }
3472                 path->top_type = orig_type;
3473
3474                 if (designator->next != NULL) {
3475                         descend_into_subtype(path);
3476                 }
3477         }
3478
3479         path->invalid  = false;
3480 }
3481
3482 static void advance_current_object(type_path_t *path)
3483 {
3484         if (path->invalid) {
3485                 /* TODO: handle this... */
3486                 panic("invalid initializer in ast2firm (excessive elements)");
3487                 return;
3488         }
3489
3490         type_path_entry_t *top = get_type_path_top(path);
3491
3492         type_t *type = skip_typeref(top->type);
3493         if (is_type_union(type)) {
3494                 top->compound_entry = NULL;
3495         } else if (is_type_struct(type)) {
3496                 entity_t *entry = top->compound_entry;
3497
3498                 top->index++;
3499                 entry               = entry->base.next;
3500                 top->compound_entry = entry;
3501                 if (entry != NULL) {
3502                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3503                         path->top_type = entry->declaration.type;
3504                         return;
3505                 }
3506         } else {
3507                 assert(is_type_array(type));
3508
3509                 top->index++;
3510                 if (!type->array.size_constant || top->index < type->array.size) {
3511                         return;
3512                 }
3513         }
3514
3515         /* we're past the last member of the current sub-aggregate, try if we
3516          * can ascend in the type hierarchy and continue with another subobject */
3517         size_t len = ARR_LEN(path->path);
3518
3519         if (len > 1) {
3520                 ascend_from_subtype(path);
3521                 advance_current_object(path);
3522         } else {
3523                 path->invalid = true;
3524         }
3525 }
3526
3527
3528 static ir_initializer_t *create_ir_initializer(
3529                 const initializer_t *initializer, type_t *type);
3530
3531 static ir_initializer_t *create_ir_initializer_value(
3532                 const initializer_value_t *initializer)
3533 {
3534         if (is_type_compound(initializer->value->base.type)) {
3535                 panic("initializer creation for compounds not implemented yet");
3536         }
3537         ir_node *value = expression_to_firm(initializer->value);
3538         return create_initializer_const(value);
3539 }
3540
3541 static ir_initializer_t *create_ir_initializer_list(
3542                 const initializer_list_t *initializer, type_t *type)
3543 {
3544         type_path_t path;
3545         memset(&path, 0, sizeof(path));
3546         path.top_type = type;
3547         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3548
3549         descend_into_subtype(&path);
3550
3551         for (size_t i = 0; i < initializer->len; ++i) {
3552                 const initializer_t *sub_initializer = initializer->initializers[i];
3553
3554                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3555                         walk_designator(&path, sub_initializer->designator.designator);
3556                         continue;
3557                 }
3558
3559                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3560                         /* we might have to descend into types until we're at a scalar
3561                          * type */
3562                         while(true) {
3563                                 type_t *orig_top_type = path.top_type;
3564                                 type_t *top_type      = skip_typeref(orig_top_type);
3565
3566                                 if (is_type_scalar(top_type))
3567                                         break;
3568                                 descend_into_subtype(&path);
3569                         }
3570                 }
3571
3572                 ir_initializer_t *sub_irinitializer
3573                         = create_ir_initializer(sub_initializer, path.top_type);
3574
3575                 size_t path_len = ARR_LEN(path.path);
3576                 assert(path_len >= 1);
3577                 type_path_entry_t *entry        = & path.path[path_len-1];
3578                 ir_initializer_t  *tinitializer = entry->initializer;
3579                 set_initializer_compound_value(tinitializer, entry->index,
3580                                                sub_irinitializer);
3581
3582                 advance_current_object(&path);
3583         }
3584
3585         assert(ARR_LEN(path.path) >= 1);
3586         ir_initializer_t *result = path.path[0].initializer;
3587         DEL_ARR_F(path.path);
3588
3589         return result;
3590 }
3591
3592 static ir_initializer_t *create_ir_initializer_string(
3593                 const initializer_string_t *initializer, type_t *type)
3594 {
3595         type = skip_typeref(type);
3596
3597         size_t            string_len    = initializer->string.size;
3598         assert(type->kind == TYPE_ARRAY);
3599         assert(type->array.size_constant);
3600         size_t            len           = type->array.size;
3601         ir_initializer_t *irinitializer = create_initializer_compound(len);
3602
3603         const char *string = initializer->string.begin;
3604         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3605
3606         for (size_t i = 0; i < len; ++i) {
3607                 char c = 0;
3608                 if (i < string_len)
3609                         c = string[i];
3610
3611                 tarval           *tv = new_tarval_from_long(c, mode);
3612                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3613
3614                 set_initializer_compound_value(irinitializer, i, char_initializer);
3615         }
3616
3617         return irinitializer;
3618 }
3619
3620 static ir_initializer_t *create_ir_initializer_wide_string(
3621                 const initializer_wide_string_t *initializer, type_t *type)
3622 {
3623         size_t            string_len    = initializer->string.size;
3624         assert(type->kind == TYPE_ARRAY);
3625         assert(type->array.size_constant);
3626         size_t            len           = type->array.size;
3627         ir_initializer_t *irinitializer = create_initializer_compound(len);
3628
3629         const wchar_rep_t *string = initializer->string.begin;
3630         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3631
3632         for (size_t i = 0; i < len; ++i) {
3633                 wchar_rep_t c = 0;
3634                 if (i < string_len) {
3635                         c = string[i];
3636                 }
3637                 tarval *tv = new_tarval_from_long(c, mode);
3638                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3639
3640                 set_initializer_compound_value(irinitializer, i, char_initializer);
3641         }
3642
3643         return irinitializer;
3644 }
3645
3646 static ir_initializer_t *create_ir_initializer(
3647                 const initializer_t *initializer, type_t *type)
3648 {
3649         switch(initializer->kind) {
3650                 case INITIALIZER_STRING:
3651                         return create_ir_initializer_string(&initializer->string, type);
3652
3653                 case INITIALIZER_WIDE_STRING:
3654                         return create_ir_initializer_wide_string(&initializer->wide_string,
3655                                                                  type);
3656
3657                 case INITIALIZER_LIST:
3658                         return create_ir_initializer_list(&initializer->list, type);
3659
3660                 case INITIALIZER_VALUE:
3661                         return create_ir_initializer_value(&initializer->value);
3662
3663                 case INITIALIZER_DESIGNATOR:
3664                         panic("unexpected designator initializer found");
3665         }
3666         panic("unknown initializer");
3667 }
3668
3669 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3670                 ir_node *base_addr)
3671 {
3672         if (is_atomic_type(type)) {
3673                 ir_mode *mode = get_type_mode(type);
3674                 tarval  *zero = get_mode_null(mode);
3675                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3676
3677                 /* TODO: bitfields */
3678                 ir_node *mem    = get_store();
3679                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3680                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3681                 set_store(proj_m);
3682         } else {
3683                 assert(is_compound_type(type));
3684
3685                 int n_members;
3686                 if (is_Array_type(type)) {
3687                         assert(has_array_upper_bound(type, 0));
3688                         n_members = get_array_upper_bound_int(type, 0);
3689                 } else {
3690                         n_members = get_compound_n_members(type);
3691                 }
3692
3693                 for (int i = 0; i < n_members; ++i) {
3694                         ir_node *addr;
3695                         ir_type *irtype;
3696                         if (is_Array_type(type)) {
3697                                 ir_entity *entity   = get_array_element_entity(type);
3698                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3699                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3700                                 ir_node   *in[1]    = { cnst };
3701                                 irtype = get_array_element_type(type);
3702                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3703                         } else {
3704                                 ir_entity *member = get_compound_member(type, i);
3705
3706                                 irtype = get_entity_type(member);
3707                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3708                         }
3709
3710                         create_dynamic_null_initializer(irtype, dbgi, addr);
3711                 }
3712         }
3713 }
3714
3715 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3716                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3717 {
3718         switch(get_initializer_kind(initializer)) {
3719         case IR_INITIALIZER_NULL: {
3720                 create_dynamic_null_initializer(type, dbgi, base_addr);
3721                 return;
3722         }
3723         case IR_INITIALIZER_CONST: {
3724                 ir_node *node     = get_initializer_const_value(initializer);
3725                 ir_mode *mode     = get_irn_mode(node);
3726                 ir_type *ent_type = get_entity_type(entity);
3727
3728                 /* is it a bitfield type? */
3729                 if (is_Primitive_type(ent_type) &&
3730                                 get_primitive_base_type(ent_type) != NULL) {
3731                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3732                         return;
3733                 }
3734
3735                 assert(get_type_mode(type) == mode);
3736                 ir_node *mem    = get_store();
3737                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3738                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3739                 set_store(proj_m);
3740                 return;
3741         }
3742         case IR_INITIALIZER_TARVAL: {
3743                 tarval  *tv       = get_initializer_tarval_value(initializer);
3744                 ir_mode *mode     = get_tarval_mode(tv);
3745                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3746                 ir_type *ent_type = get_entity_type(entity);
3747
3748                 /* is it a bitfield type? */
3749                 if (is_Primitive_type(ent_type) &&
3750                                 get_primitive_base_type(ent_type) != NULL) {
3751                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3752                         return;
3753                 }
3754
3755                 assert(get_type_mode(type) == mode);
3756                 ir_node *mem    = get_store();
3757                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3758                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3759                 set_store(proj_m);
3760                 return;
3761         }
3762         case IR_INITIALIZER_COMPOUND: {
3763                 assert(is_compound_type(type));
3764                 int n_members;
3765                 if (is_Array_type(type)) {
3766                         assert(has_array_upper_bound(type, 0));
3767                         n_members = get_array_upper_bound_int(type, 0);
3768                 } else {
3769                         n_members = get_compound_n_members(type);
3770                 }
3771
3772                 if (get_initializer_compound_n_entries(initializer)
3773                                 != (unsigned) n_members)
3774                         panic("initializer doesn't match compound type");
3775
3776                 for (int i = 0; i < n_members; ++i) {
3777                         ir_node   *addr;
3778                         ir_type   *irtype;
3779                         ir_entity *sub_entity;
3780                         if (is_Array_type(type)) {
3781                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3782                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3783                                 ir_node   *in[1]    = { cnst };
3784                                 irtype     = get_array_element_type(type);
3785                                 sub_entity = get_array_element_entity(type);
3786                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3787                                                        sub_entity);
3788                         } else {
3789                                 sub_entity = get_compound_member(type, i);
3790                                 irtype     = get_entity_type(sub_entity);
3791                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3792                                                              sub_entity);
3793                         }
3794
3795                         ir_initializer_t *sub_init
3796                                 = get_initializer_compound_value(initializer, i);
3797
3798                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3799                                                        addr);
3800                 }
3801                 return;
3802         }
3803         }
3804
3805         panic("invalid IR_INITIALIZER found");
3806 }
3807
3808 static void create_dynamic_initializer(ir_initializer_t *initializer,
3809                 dbg_info *dbgi, ir_entity *entity)
3810 {
3811         ir_node *frame     = get_local_frame(entity);
3812         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3813         ir_type *type      = get_entity_type(entity);
3814
3815         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3816 }
3817
3818 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3819                                      ir_entity *entity, type_t *type)
3820 {
3821         ir_node *memory = get_store();
3822         ir_node *nomem  = new_NoMem();
3823         ir_node *frame  = get_irg_frame(current_ir_graph);
3824         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3825
3826         if (initializer->kind == INITIALIZER_VALUE) {
3827                 initializer_value_t *initializer_value = &initializer->value;
3828
3829                 ir_node *value = expression_to_firm(initializer_value->value);
3830                 type = skip_typeref(type);
3831                 assign_value(dbgi, addr, type, value);
3832                 return;
3833         }
3834
3835         if (!is_constant_initializer(initializer)) {
3836                 ir_initializer_t *irinitializer
3837                         = create_ir_initializer(initializer, type);
3838
3839                 create_dynamic_initializer(irinitializer, dbgi, entity);
3840                 return;
3841         }
3842
3843         /* create the ir_initializer */
3844         ir_graph *const old_current_ir_graph = current_ir_graph;
3845         current_ir_graph = get_const_code_irg();
3846
3847         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3848
3849         assert(current_ir_graph == get_const_code_irg());
3850         current_ir_graph = old_current_ir_graph;
3851
3852         /* create a "template" entity which is copied to the entity on the stack */
3853         ident     *const id          = id_unique("initializer.%u");
3854         ir_type   *const irtype      = get_ir_type(type);
3855         ir_type   *const global_type = get_glob_type();
3856         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3857         set_entity_ld_ident(init_entity, id);
3858
3859         set_entity_variability(init_entity, variability_initialized);
3860         set_entity_visibility(init_entity, visibility_local);
3861         set_entity_allocation(init_entity, allocation_static);
3862
3863         set_entity_initializer(init_entity, irinitializer);
3864
3865         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3866         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3867
3868         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3869         set_store(copyb_mem);
3870 }
3871
3872 static void create_initializer_local_variable_entity(entity_t *entity)
3873 {
3874         assert(entity->kind == ENTITY_VARIABLE);
3875         initializer_t *initializer = entity->variable.initializer;
3876         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3877         ir_entity     *irentity    = entity->variable.v.entity;
3878         type_t        *type        = entity->declaration.type;
3879         create_local_initializer(initializer, dbgi, irentity, type);
3880 }
3881
3882 static void create_variable_initializer(entity_t *entity)
3883 {
3884         assert(entity->kind == ENTITY_VARIABLE);
3885         initializer_t *initializer = entity->variable.initializer;
3886         if (initializer == NULL)
3887                 return;
3888
3889         declaration_kind_t declaration_kind
3890                 = (declaration_kind_t) entity->declaration.kind;
3891         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3892                 create_initializer_local_variable_entity(entity);
3893                 return;
3894         }
3895
3896         type_t            *type = entity->declaration.type;
3897         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3898
3899         if (initializer->kind == INITIALIZER_VALUE) {
3900                 initializer_value_t *initializer_value = &initializer->value;
3901                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3902
3903                 ir_node *value = expression_to_firm(initializer_value->value);
3904                 value = do_strict_conv(dbgi, value);
3905
3906                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3907                         set_value(entity->variable.v.value_number, value);
3908                 } else {
3909                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3910
3911                         ir_entity *irentity = entity->variable.v.entity;
3912
3913                         if (tq & TYPE_QUALIFIER_CONST) {
3914                                 set_entity_variability(irentity, variability_constant);
3915                         } else {
3916                                 set_entity_variability(irentity, variability_initialized);
3917                         }
3918                         set_atomic_ent_value(irentity, value);
3919                 }
3920         } else {
3921                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3922                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3923
3924                 ir_entity        *irentity        = entity->variable.v.entity;
3925                 ir_initializer_t *irinitializer
3926                         = create_ir_initializer(initializer, type);
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_entity_initializer(irentity, irinitializer);
3934         }
3935 }
3936
3937 static void create_variable_length_array(entity_t *entity)
3938 {
3939         assert(entity->kind == ENTITY_VARIABLE);
3940         assert(entity->variable.initializer == NULL);
3941
3942         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3943         entity->variable.v.vla_base = NULL;
3944
3945         /* TODO: record VLA somewhere so we create the free node when we leave
3946          * it's scope */
3947 }
3948
3949 static void allocate_variable_length_array(entity_t *entity)
3950 {
3951         assert(entity->kind == ENTITY_VARIABLE);
3952         assert(entity->variable.initializer == NULL);
3953         assert(get_cur_block() != NULL);
3954
3955         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3956         type_t   *type      = entity->declaration.type;
3957         ir_type  *el_type   = get_ir_type(type->array.element_type);
3958
3959         /* make sure size_node is calculated */
3960         get_type_size(type);
3961         ir_node  *elems = type->array.size_node;
3962         ir_node  *mem   = get_store();
3963         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3964
3965         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3966         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3967         set_store(proj_m);
3968
3969         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3970         entity->variable.v.vla_base = addr;
3971 }
3972
3973 /**
3974  * Creates a Firm local variable from a declaration.
3975  */
3976 static void create_local_variable(entity_t *entity)
3977 {
3978         assert(entity->kind == ENTITY_VARIABLE);
3979         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3980
3981         bool needs_entity = entity->variable.address_taken;
3982         type_t *type = skip_typeref(entity->declaration.type);
3983
3984         /* is it a variable length array? */
3985         if (is_type_array(type) && !type->array.size_constant) {
3986                 create_variable_length_array(entity);
3987                 return;
3988         } else if (is_type_array(type) || is_type_compound(type)) {
3989                 needs_entity = true;
3990         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3991                 needs_entity = true;
3992         }
3993
3994         if (needs_entity) {
3995                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3996                 create_variable_entity(entity,
3997                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3998                                        frame_type);
3999         } else {
4000                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4001                 entity->variable.v.value_number = next_value_number_function;
4002                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4003                                         (variable_t*) &entity->variable);
4004                 ++next_value_number_function;
4005         }
4006 }
4007
4008 static void create_local_static_variable(entity_t *entity)
4009 {
4010         assert(entity->kind == ENTITY_VARIABLE);
4011         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4012
4013         type_t    *const type        = skip_typeref(entity->declaration.type);
4014         ir_type   *const global_type = get_glob_type();
4015         ir_type   *const irtype      = get_ir_type(type);
4016         dbg_info  *const dbgi        = get_dbg_info(&entity->base.source_position);
4017
4018         size_t l = strlen(entity->base.symbol->string);
4019         char   buf[l + sizeof(".%u")];
4020         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4021         ident     *const id = id_unique(buf);
4022
4023         ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4024
4025         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4026                 set_entity_volatility(irentity, volatility_is_volatile);
4027         }
4028
4029         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4030         entity->variable.v.entity = irentity;
4031         set_entity_ld_ident(irentity, create_ld_ident(irentity, entity));
4032         set_entity_variability(irentity, variability_uninitialized);
4033         set_entity_visibility(irentity, visibility_local);
4034         set_entity_allocation(irentity, allocation_static);
4035
4036         ir_graph *const old_current_ir_graph = current_ir_graph;
4037         current_ir_graph = get_const_code_irg();
4038
4039         create_variable_initializer(entity);
4040
4041         assert(current_ir_graph == get_const_code_irg());
4042         current_ir_graph = old_current_ir_graph;
4043 }
4044
4045
4046
4047 static void return_statement_to_firm(return_statement_t *statement)
4048 {
4049         if (get_cur_block() == NULL)
4050                 return;
4051
4052         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4053         type_t   *type        = current_function_entity->declaration.type;
4054         ir_type  *func_irtype = get_ir_type(type);
4055
4056
4057         ir_node *in[1];
4058         int      in_len;
4059         if (get_method_n_ress(func_irtype) > 0) {
4060                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4061
4062                 if (statement->value != NULL) {
4063                         ir_node *node = expression_to_firm(statement->value);
4064                         node  = do_strict_conv(dbgi, node);
4065                         in[0] = node;
4066                 } else {
4067                         ir_mode *mode;
4068                         if (is_compound_type(res_type)) {
4069                                 mode = mode_P_data;
4070                         } else {
4071                                 mode = get_type_mode(res_type);
4072                         }
4073                         in[0] = new_Unknown(mode);
4074                 }
4075                 in_len = 1;
4076         } else {
4077                 /* build return_value for its side effects */
4078                 if (statement->value != NULL) {
4079                         expression_to_firm(statement->value);
4080                 }
4081                 in_len = 0;
4082         }
4083
4084         ir_node  *store = get_store();
4085         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4086
4087         ir_node *end_block = get_irg_end_block(current_ir_graph);
4088         add_immBlock_pred(end_block, ret);
4089
4090         set_cur_block(NULL);
4091 }
4092
4093 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4094 {
4095         if (get_cur_block() == NULL)
4096                 return NULL;
4097
4098         return expression_to_firm(statement->expression);
4099 }
4100
4101 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4102 {
4103         entity_t *entity = compound->scope.entities;
4104         for ( ; entity != NULL; entity = entity->base.next) {
4105                 if (!is_declaration(entity))
4106                         continue;
4107
4108                 create_local_declaration(entity);
4109         }
4110
4111         ir_node     *result    = NULL;
4112         statement_t *statement = compound->statements;
4113         for ( ; statement != NULL; statement = statement->base.next) {
4114                 if (statement->base.next == NULL
4115                                 && statement->kind == STATEMENT_EXPRESSION) {
4116                         result = expression_statement_to_firm(
4117                                         &statement->expression);
4118                         break;
4119                 }
4120                 statement_to_firm(statement);
4121         }
4122
4123         return result;
4124 }
4125
4126 static void create_global_variable(entity_t *entity)
4127 {
4128         assert(entity->kind == ENTITY_VARIABLE);
4129
4130         ir_visibility  vis;
4131         ir_type       *var_type;
4132         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4133                 case STORAGE_CLASS_STATIC:
4134                         vis = visibility_local;
4135                         goto global_var;
4136
4137                 case STORAGE_CLASS_EXTERN:
4138                         vis = visibility_external_allocated;
4139                         goto global_var;
4140
4141                 case STORAGE_CLASS_NONE:
4142                         vis = visibility_external_visible;
4143                         goto global_var;
4144
4145                 case STORAGE_CLASS_THREAD:
4146                         vis = visibility_external_visible;
4147                         goto tls_var;
4148
4149                 case STORAGE_CLASS_THREAD_EXTERN:
4150                         vis = visibility_external_allocated;
4151                         goto tls_var;
4152
4153                 case STORAGE_CLASS_THREAD_STATIC:
4154                         vis = visibility_local;
4155                         goto tls_var;
4156
4157 tls_var:
4158                         var_type = get_tls_type();
4159                         goto create_var;
4160
4161 global_var:
4162                         var_type = get_glob_type();
4163                         goto create_var;
4164
4165 create_var:
4166                         create_variable_entity(entity,
4167                                                DECLARATION_KIND_GLOBAL_VARIABLE,
4168                                                var_type);
4169                         /* Matze: I'm confused, shouldn't we only be here when creating
4170                          * variables? */
4171 #if 0
4172                         if (!is_type_function(skip_typeref(entity->declaration.type))) {
4173                                 set_entity_visibility(declaration->v.entity, vis);
4174                         }
4175 #else
4176                         set_entity_visibility(entity->variable.v.entity, vis);
4177 #endif
4178
4179                         return;
4180
4181                 case STORAGE_CLASS_TYPEDEF:
4182                 case STORAGE_CLASS_AUTO:
4183                 case STORAGE_CLASS_REGISTER:
4184                         break;
4185         }
4186         panic("Invalid storage class for global variable");
4187 }
4188
4189 static void create_local_declaration(entity_t *entity)
4190 {
4191         assert(is_declaration(entity));
4192
4193         /* construct type */
4194         (void) get_ir_type(entity->declaration.type);
4195         if (entity->base.symbol == NULL) {
4196                 return;
4197         }
4198
4199         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4200         case STORAGE_CLASS_STATIC:
4201                 create_local_static_variable(entity);
4202                 return;
4203         case STORAGE_CLASS_EXTERN:
4204                 if (entity->kind == ENTITY_FUNCTION) {
4205                         assert(entity->function.statement == NULL);
4206                         get_function_entity(entity);
4207                 } else {
4208                         create_global_variable(entity);
4209                         create_variable_initializer(entity);
4210                 }
4211                 return;
4212         case STORAGE_CLASS_NONE:
4213         case STORAGE_CLASS_AUTO:
4214         case STORAGE_CLASS_REGISTER:
4215                 if (entity->kind == ENTITY_FUNCTION) {
4216                         if (entity->function.statement != NULL) {
4217                                 get_function_entity(entity);
4218                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4219                                 enqueue_inner_function(entity);
4220                         } else {
4221                                 get_function_entity(entity);
4222                         }
4223                 } else {
4224                         create_local_variable(entity);
4225                 }
4226                 return;
4227         case STORAGE_CLASS_TYPEDEF:
4228         case STORAGE_CLASS_THREAD:
4229         case STORAGE_CLASS_THREAD_EXTERN:
4230         case STORAGE_CLASS_THREAD_STATIC:
4231                 break;
4232         }
4233         panic("invalid storage class found");
4234 }
4235
4236 static void initialize_local_declaration(entity_t *entity)
4237 {
4238         if (entity->base.symbol == NULL)
4239                 return;
4240
4241         switch ((declaration_kind_t) entity->declaration.kind) {
4242         case DECLARATION_KIND_LOCAL_VARIABLE:
4243         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4244                 create_variable_initializer(entity);
4245                 return;
4246
4247         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4248                 allocate_variable_length_array(entity);
4249                 return;
4250
4251         case DECLARATION_KIND_COMPOUND_MEMBER:
4252         case DECLARATION_KIND_GLOBAL_VARIABLE:
4253         case DECLARATION_KIND_FUNCTION:
4254         case DECLARATION_KIND_INNER_FUNCTION:
4255                 return;
4256
4257         case DECLARATION_KIND_UNKNOWN:
4258                 panic("can't initialize unknown declaration");
4259         }
4260         panic("invalid declaration kind");
4261 }
4262
4263 static void declaration_statement_to_firm(declaration_statement_t *statement)
4264 {
4265         entity_t *entity = statement->declarations_begin;
4266         entity_t *end    = statement->declarations_end->base.next;
4267         for ( ; entity != end; entity = entity->base.next) {
4268                 if (!is_declaration(entity))
4269                         continue;
4270                 initialize_local_declaration(entity);
4271         }
4272 }
4273
4274 static void if_statement_to_firm(if_statement_t *statement)
4275 {
4276         ir_node *cur_block = get_cur_block();
4277
4278         ir_node *fallthrough_block = NULL;
4279
4280         /* the true (blocks) */
4281         ir_node *true_block = NULL;
4282         if (statement->true_statement != NULL) {
4283                 true_block = new_immBlock();
4284                 statement_to_firm(statement->true_statement);
4285                 if (get_cur_block() != NULL) {
4286                         ir_node *jmp = new_Jmp();
4287                         if (fallthrough_block == NULL)
4288                                 fallthrough_block = new_immBlock();
4289                         add_immBlock_pred(fallthrough_block, jmp);
4290                 }
4291         }
4292
4293         /* the false (blocks) */
4294         ir_node *false_block = NULL;
4295         if (statement->false_statement != NULL) {
4296                 false_block = new_immBlock();
4297
4298                 statement_to_firm(statement->false_statement);
4299                 if (get_cur_block() != NULL) {
4300                         ir_node *jmp = new_Jmp();
4301                         if (fallthrough_block == NULL)
4302                                 fallthrough_block = new_immBlock();
4303                         add_immBlock_pred(fallthrough_block, jmp);
4304                 }
4305         }
4306
4307         /* create the condition */
4308         if (cur_block != NULL) {
4309                 if (true_block == NULL || false_block == NULL) {
4310                         if (fallthrough_block == NULL)
4311                                 fallthrough_block = new_immBlock();
4312                         if (true_block == NULL)
4313                                 true_block = fallthrough_block;
4314                         if (false_block == NULL)
4315                                 false_block = fallthrough_block;
4316                 }
4317
4318                 set_cur_block(cur_block);
4319                 create_condition_evaluation(statement->condition, true_block,
4320                                             false_block);
4321         }
4322
4323         mature_immBlock(true_block);
4324         if (false_block != fallthrough_block && false_block != NULL) {
4325                 mature_immBlock(false_block);
4326         }
4327         if (fallthrough_block != NULL) {
4328                 mature_immBlock(fallthrough_block);
4329         }
4330
4331         set_cur_block(fallthrough_block);
4332 }
4333
4334 static void while_statement_to_firm(while_statement_t *statement)
4335 {
4336         ir_node *jmp = NULL;
4337         if (get_cur_block() != NULL) {
4338                 jmp = new_Jmp();
4339         }
4340
4341         /* create the header block */
4342         ir_node *header_block = new_immBlock();
4343         if (jmp != NULL) {
4344                 add_immBlock_pred(header_block, jmp);
4345         }
4346
4347         /* the loop body */
4348         ir_node *old_continue_label = continue_label;
4349         ir_node *old_break_label    = break_label;
4350         continue_label              = header_block;
4351         break_label                 = NULL;
4352
4353         ir_node *body_block = new_immBlock();
4354         statement_to_firm(statement->body);
4355         ir_node *false_block = break_label;
4356
4357         assert(continue_label == header_block);
4358         continue_label = old_continue_label;
4359         break_label    = old_break_label;
4360
4361         if (get_cur_block() != NULL) {
4362                 jmp = new_Jmp();
4363                 add_immBlock_pred(header_block, jmp);
4364         }
4365
4366         /* shortcut for while(true) */
4367         if (is_constant_expression(statement->condition)
4368                         && fold_constant(statement->condition) != 0) {
4369                 set_cur_block(header_block);
4370                 ir_node *header_jmp = new_Jmp();
4371                 add_immBlock_pred(body_block, header_jmp);
4372
4373                 keep_alive(body_block);
4374                 keep_all_memory(body_block);
4375                 set_cur_block(body_block);
4376         } else {
4377                 if (false_block == NULL) {
4378                         false_block = new_immBlock();
4379                 }
4380
4381                 /* create the condition */
4382                 set_cur_block(header_block);
4383
4384                 create_condition_evaluation(statement->condition, body_block,
4385                                             false_block);
4386         }
4387
4388         mature_immBlock(body_block);
4389         mature_immBlock(header_block);
4390         if (false_block != NULL) {
4391                 mature_immBlock(false_block);
4392         }
4393
4394         set_cur_block(false_block);
4395 }
4396
4397 static void do_while_statement_to_firm(do_while_statement_t *statement)
4398 {
4399         ir_node *jmp = NULL;
4400         if (get_cur_block() != NULL) {
4401                 jmp = new_Jmp();
4402         }
4403
4404         /* create the header block */
4405         ir_node *header_block = new_immBlock();
4406
4407         /* the loop body */
4408         ir_node *body_block = new_immBlock();
4409         if (jmp != NULL) {
4410                 add_immBlock_pred(body_block, jmp);
4411         }
4412
4413         ir_node *old_continue_label = continue_label;
4414         ir_node *old_break_label    = break_label;
4415         continue_label              = header_block;
4416         break_label                 = NULL;
4417
4418         statement_to_firm(statement->body);
4419         ir_node *false_block = break_label;
4420
4421         assert(continue_label == header_block);
4422         continue_label = old_continue_label;
4423         break_label    = old_break_label;
4424
4425         if (get_cur_block() != NULL) {
4426                 ir_node *body_jmp = new_Jmp();
4427                 add_immBlock_pred(header_block, body_jmp);
4428                 mature_immBlock(header_block);
4429         }
4430
4431         if (false_block == NULL) {
4432                 false_block = new_immBlock();
4433         }
4434
4435         /* create the condition */
4436         set_cur_block(header_block);
4437
4438         create_condition_evaluation(statement->condition, body_block, false_block);
4439         mature_immBlock(body_block);
4440         mature_immBlock(header_block);
4441         if (false_block != NULL) {
4442                 mature_immBlock(false_block);
4443         }
4444
4445         set_cur_block(false_block);
4446 }
4447
4448 static void for_statement_to_firm(for_statement_t *statement)
4449 {
4450         ir_node *jmp = NULL;
4451
4452         /* create declarations */
4453         entity_t *entity = statement->scope.entities;
4454         for ( ; entity != NULL; entity = entity->base.next) {
4455                 if (!is_declaration(entity))
4456                         continue;
4457
4458                 create_local_declaration(entity);
4459         }
4460
4461         if (get_cur_block() != NULL) {
4462                 entity = statement->scope.entities;
4463                 for ( ; entity != NULL; entity = entity->base.next) {
4464                         if (!is_declaration(entity))
4465                                 continue;
4466
4467                         initialize_local_declaration(entity);
4468                 }
4469
4470                 if (statement->initialisation != NULL) {
4471                         expression_to_firm(statement->initialisation);
4472                 }
4473
4474                 jmp = new_Jmp();
4475         }
4476
4477
4478         /* create the step block */
4479         ir_node *const step_block = new_immBlock();
4480         if (statement->step != NULL) {
4481                 expression_to_firm(statement->step);
4482         }
4483         ir_node *const step_jmp = new_Jmp();
4484
4485         /* create the header block */
4486         ir_node *const header_block = new_immBlock();
4487         if (jmp != NULL) {
4488                 add_immBlock_pred(header_block, jmp);
4489         }
4490         add_immBlock_pred(header_block, step_jmp);
4491
4492         /* the false block */
4493         ir_node *const false_block = new_immBlock();
4494
4495         /* the loop body */
4496         ir_node * body_block;
4497         if (statement->body != NULL) {
4498                 ir_node *const old_continue_label = continue_label;
4499                 ir_node *const old_break_label    = break_label;
4500                 continue_label = step_block;
4501                 break_label    = false_block;
4502
4503                 body_block = new_immBlock();
4504                 statement_to_firm(statement->body);
4505
4506                 assert(continue_label == step_block);
4507                 assert(break_label    == false_block);
4508                 continue_label = old_continue_label;
4509                 break_label    = old_break_label;
4510
4511                 if (get_cur_block() != NULL) {
4512                         jmp = new_Jmp();
4513                         add_immBlock_pred(step_block, jmp);
4514                 }
4515         } else {
4516                 body_block = step_block;
4517         }
4518
4519         /* create the condition */
4520         set_cur_block(header_block);
4521         if (statement->condition != NULL) {
4522                 create_condition_evaluation(statement->condition, body_block,
4523                                             false_block);
4524         } else {
4525                 keep_alive(header_block);
4526                 keep_all_memory(header_block);
4527                 jmp = new_Jmp();
4528                 add_immBlock_pred(body_block, jmp);
4529         }
4530
4531         mature_immBlock(body_block);
4532         mature_immBlock(false_block);
4533         mature_immBlock(step_block);
4534         mature_immBlock(header_block);
4535         mature_immBlock(false_block);
4536
4537         set_cur_block(false_block);
4538 }
4539
4540 static void create_jump_statement(const statement_t *statement,
4541                                   ir_node *target_block)
4542 {
4543         if (get_cur_block() == NULL)
4544                 return;
4545
4546         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4547         ir_node  *jump = new_d_Jmp(dbgi);
4548         add_immBlock_pred(target_block, jump);
4549
4550         set_cur_block(NULL);
4551 }
4552
4553 static ir_node *get_break_label(void)
4554 {
4555         if (break_label == NULL) {
4556                 ir_node *cur_block = get_cur_block();
4557                 break_label = new_immBlock();
4558                 set_cur_block(cur_block);
4559         }
4560         return break_label;
4561 }
4562
4563 static void switch_statement_to_firm(switch_statement_t *statement)
4564 {
4565         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4566
4567         ir_node *expression  = expression_to_firm(statement->expression);
4568         ir_node *cond        = new_d_Cond(dbgi, expression);
4569
4570         set_cur_block(NULL);
4571
4572         ir_node *const old_switch_cond       = current_switch_cond;
4573         ir_node *const old_break_label       = break_label;
4574         const bool     old_saw_default_label = saw_default_label;
4575         saw_default_label                    = false;
4576         current_switch_cond                  = cond;
4577         break_label                          = NULL;
4578         switch_statement_t *const old_switch = current_switch;
4579         current_switch                       = statement;
4580
4581         /* determine a free number for the default label */
4582         unsigned long num_cases = 0;
4583         long def_nr = 0;
4584         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4585                 if (l->expression == NULL) {
4586                         /* default case */
4587                         continue;
4588                 }
4589                 if (l->last_case >= l->first_case)
4590                         num_cases += l->last_case - l->first_case + 1;
4591                 if (l->last_case > def_nr)
4592                         def_nr = l->last_case;
4593         }
4594
4595         if (def_nr == INT_MAX) {
4596                 /* Bad: an overflow will occurr, we cannot be sure that the
4597                  * maximum + 1 is a free number. Scan the values a second
4598                  * time to find a free number.
4599                  */
4600                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4601
4602                 memset(bits, 0, (num_cases + 7) >> 3);
4603                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4604                         if (l->expression == NULL) {
4605                                 /* default case */
4606                                 continue;
4607                         }
4608                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4609                         if (start < num_cases && l->last_case >= 0) {
4610                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4611                                         (unsigned long)l->last_case : num_cases - 1;
4612                                 for (unsigned long cns = start; cns <= end; ++cns) {
4613                                         bits[cns >> 3] |= (1 << (cns & 7));
4614                                 }
4615                         }
4616                 }
4617                 /* We look at the first num_cases constants:
4618                  * Either they are densed, so we took the last (num_cases)
4619                  * one, or they are non densed, so we will find one free
4620                  * there...
4621                  */
4622                 unsigned long i;
4623                 for (i = 0; i < num_cases; ++i)
4624                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4625                                 break;
4626
4627                 free(bits);
4628                 def_nr = i;
4629         } else {
4630                 ++def_nr;
4631         }
4632         statement->default_proj_nr = def_nr;
4633
4634         if (statement->body != NULL) {
4635                 statement_to_firm(statement->body);
4636         }
4637
4638         if (get_cur_block() != NULL) {
4639                 ir_node *jmp = new_Jmp();
4640                 add_immBlock_pred(get_break_label(), jmp);
4641         }
4642
4643         if (!saw_default_label) {
4644                 set_cur_block(get_nodes_block(cond));
4645                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4646                                                         statement->default_proj_nr);
4647                 add_immBlock_pred(get_break_label(), proj);
4648         }
4649
4650         if (break_label != NULL) {
4651                 mature_immBlock(break_label);
4652         }
4653         set_cur_block(break_label);
4654
4655         assert(current_switch_cond == cond);
4656         current_switch      = old_switch;
4657         current_switch_cond = old_switch_cond;
4658         break_label         = old_break_label;
4659         saw_default_label   = old_saw_default_label;
4660 }
4661
4662 static void case_label_to_firm(const case_label_statement_t *statement)
4663 {
4664         if (statement->is_empty_range)
4665                 return;
4666
4667         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4668
4669         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4670
4671         ir_node *proj;
4672         ir_node *old_block = get_nodes_block(current_switch_cond);
4673         ir_node *block     = new_immBlock();
4674
4675         set_cur_block(old_block);
4676         if (statement->expression != NULL) {
4677                 long pn     = statement->first_case;
4678                 long end_pn = statement->last_case;
4679                 assert(pn <= end_pn);
4680                 /* create jumps for all cases in the given range */
4681                 do {
4682                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4683                         add_immBlock_pred(block, proj);
4684                 } while(pn++ < end_pn);
4685         } else {
4686                 saw_default_label = true;
4687                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4688                                          current_switch->default_proj_nr);
4689
4690                 add_immBlock_pred(block, proj);
4691         }
4692
4693         if (fallthrough != NULL) {
4694                 add_immBlock_pred(block, fallthrough);
4695         }
4696         mature_immBlock(block);
4697         set_cur_block(block);
4698
4699         if (statement->statement != NULL) {
4700                 statement_to_firm(statement->statement);
4701         }
4702 }
4703
4704 static void label_to_firm(const label_statement_t *statement)
4705 {
4706         ir_node *block = get_label_block(statement->label);
4707
4708         if (get_cur_block() != NULL) {
4709                 ir_node *jmp = new_Jmp();
4710                 add_immBlock_pred(block, jmp);
4711         }
4712
4713         set_cur_block(block);
4714         keep_alive(block);
4715         keep_all_memory(block);
4716
4717         if (statement->statement != NULL) {
4718                 statement_to_firm(statement->statement);
4719         }
4720 }
4721
4722 static void goto_to_firm(const goto_statement_t *statement)
4723 {
4724         if (get_cur_block() == NULL)
4725                 return;
4726
4727         if (statement->expression) {
4728                 ir_node  *irn  = expression_to_firm(statement->expression);
4729                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4730                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4731
4732                 set_irn_link(ijmp, ijmp_list);
4733                 ijmp_list = ijmp;
4734         } else {
4735                 ir_node *block = get_label_block(statement->label);
4736                 ir_node *jmp   = new_Jmp();
4737                 add_immBlock_pred(block, jmp);
4738         }
4739         set_cur_block(NULL);
4740 }
4741
4742 static void asm_statement_to_firm(const asm_statement_t *statement)
4743 {
4744         bool needs_memory = false;
4745
4746         if (statement->is_volatile) {
4747                 needs_memory = true;
4748         }
4749
4750         size_t         n_clobbers = 0;
4751         asm_clobber_t *clobber    = statement->clobbers;
4752         for ( ; clobber != NULL; clobber = clobber->next) {
4753                 const char *clobber_str = clobber->clobber.begin;
4754
4755                 if (!be_is_valid_clobber(clobber_str)) {
4756                         errorf(&statement->base.source_position,
4757                                    "invalid clobber '%s' specified", clobber->clobber);
4758                         continue;
4759                 }
4760
4761                 if (strcmp(clobber_str, "memory") == 0) {
4762                         needs_memory = true;
4763                         continue;
4764                 }
4765
4766                 ident *id = new_id_from_str(clobber_str);
4767                 obstack_ptr_grow(&asm_obst, id);
4768                 ++n_clobbers;
4769         }
4770         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4771         ident **clobbers = NULL;
4772         if (n_clobbers > 0) {
4773                 clobbers = obstack_finish(&asm_obst);
4774         }
4775
4776         size_t n_inputs  = 0;
4777         asm_argument_t *argument = statement->inputs;
4778         for ( ; argument != NULL; argument = argument->next)
4779                 n_inputs++;
4780         size_t n_outputs = 0;
4781         argument = statement->outputs;
4782         for ( ; argument != NULL; argument = argument->next)
4783                 n_outputs++;
4784
4785         unsigned next_pos = 0;
4786
4787         ir_node *ins[n_inputs + n_outputs + 1];
4788         size_t   in_size = 0;
4789
4790         ir_asm_constraint tmp_in_constraints[n_outputs];
4791
4792         const expression_t *out_exprs[n_outputs];
4793         ir_node            *out_addrs[n_outputs];
4794         size_t              out_size = 0;
4795
4796         argument = statement->outputs;
4797         for ( ; argument != NULL; argument = argument->next) {
4798                 const char *constraints = argument->constraints.begin;
4799                 asm_constraint_flags_t asm_flags
4800                         = be_parse_asm_constraints(constraints);
4801
4802                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4803                         errorf(&statement->base.source_position,
4804                                "some constraints in '%s' are not supported", constraints);
4805                         continue;
4806                 }
4807                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4808                         errorf(&statement->base.source_position,
4809                                "some constraints in '%s' are invalid", constraints);
4810                         continue;
4811                 }
4812                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4813                         errorf(&statement->base.source_position,
4814                                "no write flag specified for output constraints '%s'",
4815                                constraints);
4816                         continue;
4817                 }
4818
4819                 unsigned pos = next_pos++;
4820                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4821                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4822                         expression_t *expr = argument->expression;
4823                         ir_node      *addr = expression_to_addr(expr);
4824                         /* in+output, construct an artifical same_as constraint on the
4825                          * input */
4826                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4827                                 char     buf[64];
4828                                 ir_node *value = get_value_from_lvalue(expr, addr);
4829
4830                                 snprintf(buf, sizeof(buf), "%u", pos);
4831
4832                                 ir_asm_constraint constraint;
4833                                 constraint.pos              = pos;
4834                                 constraint.constraint       = new_id_from_str(buf);
4835                                 constraint.mode             = get_ir_mode(expr->base.type);
4836                                 tmp_in_constraints[in_size] = constraint;
4837                                 ins[in_size] = value;
4838
4839                                 ++in_size;
4840                         }
4841
4842                         out_exprs[out_size] = expr;
4843                         out_addrs[out_size] = addr;
4844                         ++out_size;
4845                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4846                         /* pure memory ops need no input (but we have to make sure we
4847                          * attach to the memory) */
4848                         assert(! (asm_flags &
4849                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4850                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4851                         needs_memory = true;
4852
4853                         /* we need to attach the address to the inputs */
4854                         expression_t *expr = argument->expression;
4855
4856                         ir_asm_constraint constraint;
4857                         constraint.pos              = pos;
4858                         constraint.constraint       = new_id_from_str(constraints);
4859                         constraint.mode             = NULL;
4860                         tmp_in_constraints[in_size] = constraint;
4861
4862                         ins[in_size]          = expression_to_addr(expr);
4863                         ++in_size;
4864                         continue;
4865                 } else {
4866                         errorf(&statement->base.source_position,
4867                                "only modifiers but no place set in constraints '%s'",
4868                                constraints);
4869                         continue;
4870                 }
4871
4872                 ir_asm_constraint constraint;
4873                 constraint.pos        = pos;
4874                 constraint.constraint = new_id_from_str(constraints);
4875                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4876
4877                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4878         }
4879         assert(obstack_object_size(&asm_obst)
4880                         == out_size * sizeof(ir_asm_constraint));
4881         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4882
4883
4884         obstack_grow(&asm_obst, tmp_in_constraints,
4885                      in_size * sizeof(tmp_in_constraints[0]));
4886         /* find and count input and output arguments */
4887         argument = statement->inputs;
4888         for ( ; argument != NULL; argument = argument->next) {
4889                 const char *constraints = argument->constraints.begin;
4890                 asm_constraint_flags_t asm_flags
4891                         = be_parse_asm_constraints(constraints);
4892
4893                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4894                         errorf(&statement->base.source_position,
4895                                "some constraints in '%s' are not supported", constraints);
4896                         continue;
4897                 }
4898                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4899                         errorf(&statement->base.source_position,
4900                                "some constraints in '%s' are invalid", constraints);
4901                         continue;
4902                 }
4903                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4904                         errorf(&statement->base.source_position,
4905                                "write flag specified for input constraints '%s'",
4906                                constraints);
4907                         continue;
4908                 }
4909
4910                 ir_node *input;
4911                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4912                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4913                         /* we can treat this as "normal" input */
4914                         input = expression_to_firm(argument->expression);
4915                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4916                         /* pure memory ops need no input (but we have to make sure we
4917                          * attach to the memory) */
4918                         assert(! (asm_flags &
4919                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4920                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4921                         needs_memory = true;
4922                         input = expression_to_addr(argument->expression);
4923                 } else {
4924                         errorf(&statement->base.source_position,
4925                                "only modifiers but no place set in constraints '%s'",
4926                                constraints);
4927                         continue;
4928                 }
4929
4930                 ir_asm_constraint constraint;
4931                 constraint.pos        = next_pos++;
4932                 constraint.constraint = new_id_from_str(constraints);
4933                 constraint.mode       = get_irn_mode(input);
4934
4935                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4936                 ins[in_size++] = input;
4937         }
4938
4939         if (needs_memory) {
4940                 ir_asm_constraint constraint;
4941                 constraint.pos        = next_pos++;
4942                 constraint.constraint = new_id_from_str("");
4943                 constraint.mode       = mode_M;
4944
4945                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4946                 ins[in_size++] = get_store();
4947         }
4948
4949         assert(obstack_object_size(&asm_obst)
4950                         == in_size * sizeof(ir_asm_constraint));
4951         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4952
4953         /* create asm node */
4954         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4955
4956         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4957
4958         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4959                                   out_size, output_constraints,
4960                                   n_clobbers, clobbers, asm_text);
4961
4962         if (statement->is_volatile) {
4963                 set_irn_pinned(node, op_pin_state_pinned);
4964         } else {
4965                 set_irn_pinned(node, op_pin_state_floats);
4966         }
4967
4968         /* create output projs & connect them */
4969         if (needs_memory) {
4970                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4971                 set_store(projm);
4972         }
4973
4974         size_t i;
4975         for (i = 0; i < out_size; ++i) {
4976                 const expression_t *out_expr = out_exprs[i];
4977                 long                pn       = i;
4978                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4979                 ir_node            *proj     = new_Proj(node, mode, pn);
4980                 ir_node            *addr     = out_addrs[i];
4981
4982                 set_value_for_expression_addr(out_expr, proj, addr);
4983         }
4984 }
4985
4986 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4987         statement_to_firm(statement->try_statement);
4988         warningf(&statement->base.source_position, "structured exception handling ignored");
4989 }
4990
4991 static void     leave_statement_to_firm(leave_statement_t *statement) {
4992         errorf(&statement->base.source_position, "__leave not supported yet");
4993 }
4994
4995 /**
4996  * Transform a statement.
4997  */
4998 static void statement_to_firm(statement_t *statement)
4999 {
5000 #ifndef NDEBUG
5001         assert(!statement->base.transformed);
5002         statement->base.transformed = true;
5003 #endif
5004
5005         switch (statement->kind) {
5006         case STATEMENT_INVALID:
5007                 panic("invalid statement found");
5008                 return;
5009         case STATEMENT_EMPTY:
5010                 /* nothing */
5011                 return;
5012         case STATEMENT_COMPOUND:
5013                 compound_statement_to_firm(&statement->compound);
5014                 return;
5015         case STATEMENT_RETURN:
5016                 return_statement_to_firm(&statement->returns);
5017                 return;
5018         case STATEMENT_EXPRESSION:
5019                 expression_statement_to_firm(&statement->expression);
5020                 return;
5021         case STATEMENT_IF:
5022                 if_statement_to_firm(&statement->ifs);
5023                 return;
5024         case STATEMENT_WHILE:
5025                 while_statement_to_firm(&statement->whiles);
5026                 return;
5027         case STATEMENT_DO_WHILE:
5028                 do_while_statement_to_firm(&statement->do_while);
5029                 return;
5030         case STATEMENT_DECLARATION:
5031                 declaration_statement_to_firm(&statement->declaration);
5032                 return;
5033         case STATEMENT_BREAK:
5034                 create_jump_statement(statement, get_break_label());
5035                 return;
5036         case STATEMENT_CONTINUE:
5037                 create_jump_statement(statement, continue_label);
5038                 return;
5039         case STATEMENT_SWITCH:
5040                 switch_statement_to_firm(&statement->switchs);
5041                 return;
5042         case STATEMENT_CASE_LABEL:
5043                 case_label_to_firm(&statement->case_label);
5044                 return;
5045         case STATEMENT_FOR:
5046                 for_statement_to_firm(&statement->fors);
5047                 return;
5048         case STATEMENT_LABEL:
5049                 label_to_firm(&statement->label);
5050                 return;
5051         case STATEMENT_LOCAL_LABEL:
5052                 /* local labels transform the semantics of labels while parsing
5053                  * they don't need any special treatment here */
5054                 return;
5055         case STATEMENT_GOTO:
5056                 goto_to_firm(&statement->gotos);
5057                 return;
5058         case STATEMENT_ASM:
5059                 asm_statement_to_firm(&statement->asms);
5060                 return;
5061         case STATEMENT_MS_TRY:
5062                 ms_try_statement_to_firm(&statement->ms_try);
5063                 return;
5064         case STATEMENT_LEAVE:
5065                 leave_statement_to_firm(&statement->leave);
5066                 return;
5067         }
5068         panic("Statement not implemented\n");
5069 }
5070
5071 static int count_local_variables(const entity_t *entity,
5072                                  const entity_t *const end)
5073 {
5074         int count = 0;
5075         for (; entity != end; entity = entity->base.next) {
5076                 if (entity->kind != ENTITY_VARIABLE)
5077                         continue;
5078                 type_t *type = skip_typeref(entity->declaration.type);
5079
5080                 if (!entity->variable.address_taken && is_type_scalar(type))
5081                         ++count;
5082         }
5083         return count;
5084 }
5085
5086 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5087 {
5088         int *const count = env;
5089
5090         switch (stmt->kind) {
5091         case STATEMENT_DECLARATION: {
5092                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5093                 *count += count_local_variables(decl_stmt->declarations_begin,
5094                                                                                 decl_stmt->declarations_end->base.next);
5095                 break;
5096         }
5097
5098         case STATEMENT_FOR:
5099                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5100                 break;
5101
5102         default:
5103                 break;
5104         }
5105 }
5106
5107 static int get_function_n_local_vars(entity_t *entity)
5108 {
5109         int count = 0;
5110
5111         /* count parameters */
5112         count += count_local_variables(entity->function.parameters.entities, NULL);
5113
5114         /* count local variables declared in body */
5115         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5116                         &count);
5117         return count;
5118 }
5119
5120 static void initialize_function_parameters(entity_t *entity)
5121 {
5122         assert(entity->kind == ENTITY_FUNCTION);
5123         ir_graph *irg             = current_ir_graph;
5124         ir_node  *args            = get_irg_args(irg);
5125         ir_node  *start_block     = get_irg_start_block(irg);
5126         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5127
5128         int       n         = 0;
5129         entity_t *parameter = entity->function.parameters.entities;
5130         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5131                 assert(parameter->kind == ENTITY_VARIABLE);
5132                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5133                 type_t *type = skip_typeref(parameter->declaration.type);
5134
5135                 bool needs_entity = parameter->variable.address_taken;
5136                 assert(!is_type_array(type));
5137                 if (is_type_compound(type)) {
5138                         needs_entity = true;
5139                 }
5140
5141                 if (needs_entity) {
5142                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5143                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5144                         set_entity_ident(entity, id);
5145
5146                         parameter->declaration.kind
5147                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5148                         parameter->variable.v.entity = entity;
5149                         continue;
5150                 }
5151
5152                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5153                 ir_mode *param_mode   = get_type_mode(param_irtype);
5154
5155                 long     pn    = n;
5156                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5157
5158                 ir_mode *mode = get_ir_mode(type);
5159                 value = create_conv(NULL, value, mode);
5160                 value = do_strict_conv(NULL, value);
5161
5162                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5163                 parameter->variable.v.value_number = next_value_number_function;
5164                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5165                                         (variable_t*) &parameter->variable);
5166                 ++next_value_number_function;
5167
5168                 set_value(parameter->variable.v.value_number, value);
5169         }
5170 }
5171
5172 /**
5173  * Handle additional decl modifiers for IR-graphs
5174  *
5175  * @param irg            the IR-graph
5176  * @param dec_modifiers  additional modifiers
5177  */
5178 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5179 {
5180         if (decl_modifiers & DM_NORETURN) {
5181                 /* TRUE if the declaration includes the Microsoft
5182                    __declspec(noreturn) specifier. */
5183                 set_irg_additional_property(irg, mtp_property_noreturn);
5184         }
5185         if (decl_modifiers & DM_NOTHROW) {
5186                 /* TRUE if the declaration includes the Microsoft
5187                    __declspec(nothrow) specifier. */
5188                 set_irg_additional_property(irg, mtp_property_nothrow);
5189         }
5190         if (decl_modifiers & DM_NAKED) {
5191                 /* TRUE if the declaration includes the Microsoft
5192                    __declspec(naked) specifier. */
5193                 set_irg_additional_property(irg, mtp_property_naked);
5194         }
5195         if (decl_modifiers & DM_FORCEINLINE) {
5196                 /* TRUE if the declaration includes the
5197                    Microsoft __forceinline specifier. */
5198                 set_irg_inline_property(irg, irg_inline_forced);
5199         }
5200         if (decl_modifiers & DM_NOINLINE) {
5201                 /* TRUE if the declaration includes the Microsoft
5202                    __declspec(noinline) specifier. */
5203                 set_irg_inline_property(irg, irg_inline_forbidden);
5204         }
5205 }
5206
5207 static void add_function_pointer(ir_type *segment, ir_entity *method,
5208                                  const char *unique_template)
5209 {
5210         ir_type   *method_type  = get_entity_type(method);
5211         ident     *id           = id_unique(unique_template);
5212         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5213
5214         ident     *ide          = id_unique(unique_template);
5215         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5216         ir_graph  *irg          = get_const_code_irg();
5217         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5218                                                            method, NULL);
5219
5220         set_entity_compiler_generated(ptr, 1);
5221         set_entity_variability(ptr, variability_constant);
5222         set_atomic_ent_value(ptr, val);
5223 }
5224
5225 /**
5226  * Generate possible IJmp branches to a given label block.
5227  */
5228 static void gen_ijmp_branches(ir_node *block) {
5229         ir_node *ijmp;
5230         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5231                 add_immBlock_pred(block, ijmp);
5232         }
5233 }
5234
5235 /**
5236  * Create code for a function.
5237  */
5238 static void create_function(entity_t *entity)
5239 {
5240         assert(entity->kind == ENTITY_FUNCTION);
5241         ir_entity *function_entity = get_function_entity(entity);
5242
5243         if (entity->function.statement == NULL)
5244                 return;
5245
5246         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5247                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5248                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5249         }
5250         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5251                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5252                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5253         }
5254
5255         current_function_entity = entity;
5256         current_function_name   = NULL;
5257         current_funcsig         = NULL;
5258
5259         assert(all_labels == NULL);
5260         all_labels = NEW_ARR_F(label_t *, 0);
5261         ijmp_list  = NULL;
5262
5263         int       n_local_vars = get_function_n_local_vars(entity);
5264         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5265
5266         ir_graph *old_current_function = current_function;
5267         current_function = irg;
5268
5269         set_irg_fp_model(irg, firm_opt.fp_model);
5270         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5271         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5272
5273         ir_node *first_block = get_cur_block();
5274
5275         /* set inline flags */
5276         if (entity->function.is_inline)
5277                 set_irg_inline_property(irg, irg_inline_recomended);
5278         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5279
5280         next_value_number_function = 0;
5281         initialize_function_parameters(entity);
5282
5283         statement_to_firm(entity->function.statement);
5284
5285         ir_node *end_block = get_irg_end_block(irg);
5286
5287         /* do we have a return statement yet? */
5288         if (get_cur_block() != NULL) {
5289                 type_t *type = skip_typeref(entity->declaration.type);
5290                 assert(is_type_function(type));
5291                 const function_type_t *func_type   = &type->function;
5292                 const type_t          *return_type
5293                         = skip_typeref(func_type->return_type);
5294
5295                 ir_node *ret;
5296                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5297                         ret = new_Return(get_store(), 0, NULL);
5298                 } else {
5299                         ir_mode *mode;
5300                         if (is_type_scalar(return_type)) {
5301                                 mode = get_ir_mode(func_type->return_type);
5302                         } else {
5303                                 mode = mode_P_data;
5304                         }
5305
5306                         ir_node *in[1];
5307                         /* §5.1.2.2.3 main implicitly returns 0 */
5308                         if (strcmp(entity->base.symbol->string, "main") == 0) {
5309                                 in[0] = new_Const(mode, get_mode_null(mode));
5310                         } else {
5311                                 in[0] = new_Unknown(mode);
5312                         }
5313                         ret = new_Return(get_store(), 1, in);
5314                 }
5315                 add_immBlock_pred(end_block, ret);
5316         }
5317
5318         bool has_computed_gotos = false;
5319         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5320                 label_t *label = all_labels[i];
5321                 if (label->address_taken) {
5322                         gen_ijmp_branches(label->block);
5323                         has_computed_gotos = true;
5324                 }
5325                 mature_immBlock(label->block);
5326         }
5327         if (has_computed_gotos) {
5328                 /* if we have computed goto's in the function, we cannot inline it */
5329                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5330                         warningf(&entity->base.source_position,
5331                                  "function '%Y' can never be inlined because it contains a computed goto",
5332                                  entity->base.symbol);
5333                 }
5334                 set_irg_inline_property(irg, irg_inline_forbidden);
5335         }
5336
5337         DEL_ARR_F(all_labels);
5338         all_labels = NULL;
5339
5340         mature_immBlock(first_block);
5341         mature_immBlock(end_block);
5342
5343         irg_finalize_cons(irg);
5344
5345         /* finalize the frame type */
5346         ir_type *frame_type = get_irg_frame_type(irg);
5347         int      n          = get_compound_n_members(frame_type);
5348         int      align_all  = 4;
5349         int      offset     = 0;
5350         for (int i = 0; i < n; ++i) {
5351                 ir_entity *entity      = get_compound_member(frame_type, i);
5352                 ir_type   *entity_type = get_entity_type(entity);
5353
5354                 int align = get_type_alignment_bytes(entity_type);
5355                 if (align > align_all)
5356                         align_all = align;
5357                 int misalign = 0;
5358                 if (align > 0) {
5359                         misalign  = offset % align;
5360                         if (misalign > 0) {
5361                                 offset += align - misalign;
5362                         }
5363                 }
5364
5365                 set_entity_offset(entity, offset);
5366                 offset += get_type_size_bytes(entity_type);
5367         }
5368         set_type_size_bytes(frame_type, offset);
5369         set_type_alignment_bytes(frame_type, align_all);
5370
5371         irg_vrfy(irg);
5372         current_function = old_current_function;
5373
5374         /* create inner functions */
5375         entity_t *inner;
5376         for (inner = next_inner_function(); inner != NULL;
5377              inner = next_inner_function()) {
5378                 create_function(inner);
5379         }
5380 }
5381
5382 static void scope_to_firm(scope_t *scope)
5383 {
5384         /* first pass: create declarations */
5385         entity_t *entity = scope->entities;
5386         for ( ; entity != NULL; entity = entity->base.next) {
5387                 if (entity->base.symbol == NULL)
5388                         continue;
5389
5390                 if (entity->kind == ENTITY_FUNCTION) {
5391                         get_function_entity(entity);
5392                 } else if (entity->kind == ENTITY_VARIABLE) {
5393                         create_global_variable(entity);
5394                 }
5395         }
5396
5397         /* second pass: create code/initializers */
5398         entity = scope->entities;
5399         for ( ; entity != NULL; entity = entity->base.next) {
5400                 if (entity->base.symbol == NULL)
5401                         continue;
5402
5403                 if (entity->kind == ENTITY_FUNCTION) {
5404                         create_function(entity);
5405                 } else if (entity->kind == ENTITY_VARIABLE) {
5406                         assert(entity->declaration.kind
5407                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5408                         current_ir_graph = get_const_code_irg();
5409                         create_variable_initializer(entity);
5410                 }
5411         }
5412 }
5413
5414 void init_ast2firm(void)
5415 {
5416         obstack_init(&asm_obst);
5417         init_atomic_modes();
5418
5419         id_underscore = new_id_from_chars("_", 1);
5420         id_imp        = new_id_from_chars("__imp_", 6);
5421
5422         /* OS option must be set to the backend */
5423         switch (firm_opt.os_support) {
5424         case OS_SUPPORT_MINGW:
5425                 create_ld_ident = create_ld_ident_win32;
5426                 break;
5427         case OS_SUPPORT_LINUX:
5428                 create_ld_ident = create_ld_ident_linux_elf;
5429                 break;
5430         case OS_SUPPORT_MACHO:
5431                 create_ld_ident = create_ld_ident_macho;
5432                 break;
5433         }
5434
5435         /* create idents for all known runtime functions */
5436         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5437                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5438         }
5439
5440         entitymap_init(&entitymap);
5441 }
5442
5443 static void init_ir_types(void)
5444 {
5445         static int ir_types_initialized = 0;
5446         if (ir_types_initialized)
5447                 return;
5448         ir_types_initialized = 1;
5449
5450         ir_type_int        = get_ir_type(type_int);
5451         ir_type_const_char = get_ir_type(type_const_char);
5452         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5453         ir_type_void       = get_ir_type(type_void);
5454 }
5455
5456 void exit_ast2firm(void)
5457 {
5458         entitymap_destroy(&entitymap);
5459         obstack_free(&asm_obst, NULL);
5460 }
5461
5462 static void global_asm_to_firm(statement_t *s)
5463 {
5464         for (; s != NULL; s = s->base.next) {
5465                 assert(s->kind == STATEMENT_ASM);
5466
5467                 char const *const text = s->asms.asm_text.begin;
5468                 size_t            size = s->asms.asm_text.size;
5469
5470                 /* skip the last \0 */
5471                 if (text[size - 1] == '\0')
5472                         --size;
5473
5474                 ident *const id = new_id_from_chars(text, size);
5475                 add_irp_asm(id);
5476         }
5477 }
5478
5479 void translation_unit_to_firm(translation_unit_t *unit)
5480 {
5481         /* just to be sure */
5482         continue_label      = NULL;
5483         break_label         = NULL;
5484         current_switch_cond = NULL;
5485
5486         init_ir_types();
5487         inner_functions = NEW_ARR_F(entity_t *, 0);
5488
5489         scope_to_firm(&unit->scope);
5490         global_asm_to_firm(unit->global_asm);
5491
5492         DEL_ARR_F(inner_functions);
5493         inner_functions  = NULL;
5494
5495         current_ir_graph = NULL;
5496 }