nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int        next_value_number_function;
  58 static ir_node   *continue_label;
  59 static ir_node   *break_label;
  60 static ir_node   *current_switch_cond;
  61 static bool       saw_default_label;
  62 static label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66
  67 extern bool       have_const_functions;
  68
  69 static const entity_t     *current_function_entity;
  70 static ir_node            *current_function_name;
  71 static ir_node            *current_funcsig;
  72 static switch_statement_t *current_switch;
  73 static ir_graph           *current_function;
  74 static translation_unit_t *current_translation_unit;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  83         DECLARATION_KIND_GLOBAL_VARIABLE,
  84         DECLARATION_KIND_LOCAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  86         DECLARATION_KIND_FUNCTION,
  87         DECLARATION_KIND_COMPOUND_MEMBER,
  88         DECLARATION_KIND_INNER_FUNCTION
  89 } declaration_kind_t;
  90
  91 static ir_mode *get_ir_mode(type_t *type);
  92 static ir_type *get_ir_type_incomplete(type_t *type);
  93
  94 static void enqueue_inner_function(entity_t *entity)
  95 {
  96         ARR_APP1(entity_t*, inner_functions, entity);
  97 }
  98
  99 static entity_t *next_inner_function(void)
 100 {
 101         int len = ARR_LEN(inner_functions);
 102         if (len == 0)
 103                 return NULL;
 104
 105         entity_t *entity = inner_functions[len-1];
 106         ARR_SHRINKLEN(inner_functions, len-1);
 107
 108         return entity;
 109 }
 110
 111 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 112 {
 113         const variable_t *variable = get_irg_loc_description(irg, pos);
 114
 115         if (variable != NULL) {
 116                 warningf(&variable->base.base.source_position,
 117                          "variable '%#T' might be used uninitialized",
 118                          variable->base.type, variable->base.base.symbol);
 119         }
 120         return new_r_Unknown(irg, mode);
 121 }
 122
 123 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 124 {
 125         const source_position_t *pos = (const source_position_t*) dbg;
 126         if (pos == NULL)
 127                 return 0;
 128         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 129                                    pos->linenr);
 130 }
 131
 132 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 133 {
 134         const source_position_t *pos = (const source_position_t*) dbg;
 135         if (pos == NULL)
 136                 return NULL;
 137         if (line != NULL)
 138                 *line = pos->linenr;
 139         return pos->input_name;
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 148
 149 static ir_mode *mode_int, *mode_uint;
 150
 151 static ir_node *_expression_to_firm(const expression_t *expression);
 152 static ir_node *expression_to_firm(const expression_t *expression);
 153 static void create_local_declaration(entity_t *entity);
 154
 155 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 156 {
 157         unsigned flags = get_atomic_type_flags(kind);
 158         unsigned size  = get_atomic_type_size(kind);
 159         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 160                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 161                 char            name[64];
 162                 ir_mode_sort    sort;
 163                 unsigned        bit_size     = size * 8;
 164                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 165                 ir_mode_arithmetic arithmetic;
 166
 167                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 168                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 169                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 170                                  bit_size);
 171                         sort         = irms_int_number;
 172                         arithmetic   = irma_twos_complement;
 173                 } else {
 174                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 175                         snprintf(name, sizeof(name), "F%u", bit_size);
 176                         sort         = irms_float_number;
 177                         arithmetic   = irma_ieee754;
 178                 }
 179                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 180                  * a too big amount */
 181                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 182                                    0);
 183         }
 184
 185         return NULL;
 186 }
 187
 188 /**
 189  * Initialises the atomic modes depending on the machine size.
 190  */
 191 static void init_atomic_modes(void)
 192 {
 193         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 194                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 195         }
 196         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 197         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 198
 199         /* there's no real void type in firm */
 200         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 201
 202         /* initialize pointer modes */
 203         char            name[64];
 204         ir_mode_sort    sort         = irms_reference;
 205         unsigned        bit_size     = machine_size;
 206         bool            is_signed    = 0;
 207         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 208         unsigned        modulo_shift
 209                 = bit_size < machine_size ? machine_size : bit_size;
 210
 211         snprintf(name, sizeof(name), "p%u", machine_size);
 212         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 213                                         modulo_shift);
 214
 215         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 216         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 217
 218         /* Hmm, pointers should be machine size */
 219         set_modeP_data(ptr_mode);
 220         set_modeP_code(ptr_mode);
 221 }
 222
 223 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 224 {
 225         assert(kind <= ATOMIC_TYPE_LAST);
 226         return atomic_modes[kind];
 227 }
 228
 229 static unsigned get_compound_type_size(compound_type_t *type)
 230 {
 231         ir_type *irtype = get_ir_type((type_t*) type);
 232         return get_type_size_bytes(irtype);
 233 }
 234
 235 static unsigned get_array_type_size(array_type_t *type)
 236 {
 237         assert(!type->is_vla);
 238         ir_type *irtype = get_ir_type((type_t*) type);
 239         return get_type_size_bytes(irtype);
 240 }
 241
 242 static unsigned get_type_size_const(type_t *type)
 243 {
 244         switch(type->kind) {
 245         case TYPE_ERROR:
 246                 panic("error type occurred");
 247         case TYPE_ATOMIC:
 248                 return get_atomic_type_size(type->atomic.akind);
 249         case TYPE_COMPLEX:
 250                 return 2 * get_atomic_type_size(type->complex.akind);
 251         case TYPE_IMAGINARY:
 252                 return get_atomic_type_size(type->imaginary.akind);
 253         case TYPE_ENUM:
 254                 return get_mode_size_bytes(mode_int);
 255         case TYPE_COMPOUND_UNION:
 256         case TYPE_COMPOUND_STRUCT:
 257                 return get_compound_type_size(&type->compound);
 258         case TYPE_FUNCTION:
 259                 /* just a pointer to the function */
 260                 return get_mode_size_bytes(mode_P_code);
 261         case TYPE_POINTER:
 262                 return get_mode_size_bytes(mode_P_data);
 263         case TYPE_ARRAY:
 264                 return get_array_type_size(&type->array);
 265         case TYPE_BUILTIN:
 266                 return get_type_size_const(type->builtin.real_type);
 267         case TYPE_BITFIELD:
 268                 panic("type size of bitfield request");
 269         case TYPE_TYPEDEF:
 270         case TYPE_TYPEOF:
 271         case TYPE_INVALID:
 272                 break;
 273         }
 274         panic("Trying to determine size of invalid type");
 275 }
 276
 277 static ir_node *get_type_size(type_t *type)
 278 {
 279         type = skip_typeref(type);
 280
 281         if (is_type_array(type) && type->array.is_vla) {
 282                 ir_node *size_node = type->array.size_node;
 283                 if (size_node == NULL) {
 284                         size_node = expression_to_firm(type->array.size_expression);
 285                         assert(!is_Const(size_node));
 286                         type->array.size_node = size_node;
 287                 }
 288
 289                 ir_node *elem_size = get_type_size(type->array.element_type);
 290                 ir_mode *mode      = get_irn_mode(size_node);
 291                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 292                 return real_size;
 293         }
 294
 295         ir_mode *mode = get_ir_mode(type_size_t);
 296         symconst_symbol sym;
 297         sym.type_p = get_ir_type(type);
 298         return new_SymConst(mode, sym, symconst_type_size);
 299 }
 300
 301 static unsigned count_parameters(const function_type_t *function_type)
 302 {
 303         unsigned count = 0;
 304
 305         function_parameter_t *parameter = function_type->parameters;
 306         for ( ; parameter != NULL; parameter = parameter->next) {
 307                 ++count;
 308         }
 309
 310         return count;
 311 }
 312
 313 /**
 314  * Creates a Firm type for an atomic type
 315  */
 316 static ir_type *create_atomic_type(const atomic_type_t *type)
 317 {
 318         atomic_type_kind_t  kind   = type->akind;
 319         ir_mode            *mode   = atomic_modes[kind];
 320         ident              *id     = get_mode_ident(mode);
 321         ir_type            *irtype = new_type_primitive(id, mode);
 322
 323         set_type_alignment_bytes(irtype, type->base.alignment);
 324
 325         return irtype;
 326 }
 327
 328 /**
 329  * Creates a Firm type for a complex type
 330  */
 331 static ir_type *create_complex_type(const complex_type_t *type)
 332 {
 333         atomic_type_kind_t  kind = type->akind;
 334         ir_mode            *mode = atomic_modes[kind];
 335         ident              *id   = get_mode_ident(mode);
 336
 337         (void) id;
 338
 339         /* FIXME: finish the array */
 340         return NULL;
 341 }
 342
 343 /**
 344  * Creates a Firm type for an imaginary type
 345  */
 346 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 347 {
 348         atomic_type_kind_t  kind      = type->akind;
 349         ir_mode            *mode      = atomic_modes[kind];
 350         ident              *id        = get_mode_ident(mode);
 351         ir_type            *irtype    = new_type_primitive(id, mode);
 352
 353         set_type_alignment_bytes(irtype, type->base.alignment);
 354
 355         return irtype;
 356 }
 357
 358 /**
 359  * return type of a parameter (and take transparent union gnu extension into
 360  * account)
 361  */
 362 static type_t *get_parameter_type(type_t *type)
 363 {
 364         type = skip_typeref(type);
 365         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 366                 compound_t *compound = type->compound.compound;
 367                 type                 = compound->members.entities->declaration.type;
 368         }
 369
 370         return type;
 371 }
 372
 373 static ir_type *create_method_type(const function_type_t *function_type)
 374 {
 375         type_t  *return_type  = skip_typeref(function_type->return_type);
 376
 377         ident   *id           = id_unique("functiontype.%u");
 378         int      n_parameters = count_parameters(function_type);
 379         int      n_results    = return_type == type_void ? 0 : 1;
 380         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 381
 382         if (return_type != type_void) {
 383                 ir_type *restype = get_ir_type(return_type);
 384                 set_method_res_type(irtype, 0, restype);
 385         }
 386
 387         function_parameter_t *parameter = function_type->parameters;
 388         int                   n         = 0;
 389         for ( ; parameter != NULL; parameter = parameter->next) {
 390                 type_t  *type     = get_parameter_type(parameter->type);
 391                 ir_type *p_irtype = get_ir_type(type);
 392                 set_method_param_type(irtype, n, p_irtype);
 393                 ++n;
 394         }
 395
 396         if (function_type->variadic || function_type->unspecified_parameters) {
 397                 set_method_variadicity(irtype, variadicity_variadic);
 398         }
 399
 400         unsigned cc = get_method_calling_convention(irtype);
 401         switch (function_type->calling_convention) {
 402         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 403         case CC_CDECL:
 404 is_cdecl:
 405                 set_method_calling_convention(irtype, SET_CDECL(cc));
 406                 break;
 407
 408         case CC_STDCALL:
 409                 if (function_type->variadic || function_type->unspecified_parameters)
 410                         goto is_cdecl;
 411
 412                 /* only non-variadic function can use stdcall, else use cdecl */
 413                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 414                 break;
 415
 416         case CC_FASTCALL:
 417                 if (function_type->variadic || function_type->unspecified_parameters)
 418                         goto is_cdecl;
 419                 /* only non-variadic function can use fastcall, else use cdecl */
 420                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 421                 break;
 422
 423         case CC_THISCALL:
 424                 /* Hmm, leave default, not accepted by the parser yet. */
 425                 break;
 426         }
 427
 428         return irtype;
 429 }
 430
 431 static ir_type *create_pointer_type(pointer_type_t *type)
 432 {
 433         type_t   *points_to    = type->points_to;
 434         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 435         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 436                                                   ir_points_to, mode_P_data);
 437
 438         return ir_type;
 439 }
 440
 441 static ir_type *create_array_type(array_type_t *type)
 442 {
 443         type_t  *element_type    = type->element_type;
 444         ir_type *ir_element_type = get_ir_type(element_type);
 445
 446         ident    *id      = id_unique("array.%u");
 447         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 448
 449         const int align = get_type_alignment_bytes(ir_element_type);
 450         set_type_alignment_bytes(ir_type, align);
 451
 452         if (type->size_constant) {
 453                 int n_elements = type->size;
 454
 455                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 456
 457                 size_t elemsize = get_type_size_bytes(ir_element_type);
 458                 if (elemsize % align > 0) {
 459                         elemsize += align - (elemsize % align);
 460                 }
 461                 set_type_size_bytes(ir_type, n_elements * elemsize);
 462         } else {
 463                 set_array_lower_bound_int(ir_type, 0, 0);
 464         }
 465         set_type_state(ir_type, layout_fixed);
 466
 467         return ir_type;
 468 }
 469
 470 /**
 471  * Return the signed integer type of size bits.
 472  *
 473  * @param size   the size
 474  */
 475 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 476                                                  unsigned size)
 477 {
 478         static ir_mode *s_modes[64 + 1] = {NULL, };
 479         ir_type *res;
 480         ir_mode *mode;
 481
 482         if (size <= 0 || size > 64)
 483                 return NULL;
 484
 485         mode = s_modes[size];
 486         if (mode == NULL) {
 487                 char name[32];
 488
 489                 snprintf(name, sizeof(name), "bf_I%u", size);
 490                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 491                                    size <= 32 ? 32 : size );
 492                 s_modes[size] = mode;
 493         }
 494
 495         char name[32];
 496         snprintf(name, sizeof(name), "I%u", size);
 497         ident *id = new_id_from_str(name);
 498         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 499         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 500         set_primitive_base_type(res, base_tp);
 501
 502         return res;
 503 }
 504
 505 /**
 506  * Return the unsigned integer type of size bits.
 507  *
 508  * @param size   the size
 509  */
 510 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 511                                                    unsigned size)
 512 {
 513         static ir_mode *u_modes[64 + 1] = {NULL, };
 514         ir_type *res;
 515         ir_mode *mode;
 516
 517         if (size <= 0 || size > 64)
 518                 return NULL;
 519
 520         mode = u_modes[size];
 521         if (mode == NULL) {
 522                 char name[32];
 523
 524                 snprintf(name, sizeof(name), "bf_U%u", size);
 525                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 526                                    size <= 32 ? 32 : size );
 527                 u_modes[size] = mode;
 528         }
 529
 530         char name[32];
 531
 532         snprintf(name, sizeof(name), "U%u", size);
 533         ident *id = new_id_from_str(name);
 534         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 535         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 536         set_primitive_base_type(res, base_tp);
 537
 538         return res;
 539 }
 540
 541 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 542 {
 543         type_t *base = skip_typeref(type->base_type);
 544         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 545         ir_type *irbase = get_ir_type(base);
 546
 547         unsigned size = type->bit_size;
 548
 549         assert(!is_type_float(base));
 550         if (is_type_signed(base)) {
 551                 return get_signed_int_type_for_bit_size(irbase, size);
 552         } else {
 553                 return get_unsigned_int_type_for_bit_size(irbase, size);
 554         }
 555 }
 556
 557 #define INVALID_TYPE ((ir_type_ptr)-1)
 558
 559 enum {
 560         COMPOUND_IS_STRUCT = false,
 561         COMPOUND_IS_UNION  = true
 562 };
 563
 564 /**
 565  * Construct firm type from ast struct type.
 566  *
 567  * As anonymous inner structs get flattened to a single firm type, we might get
 568  * irtype, outer_offset and out_align passed (they represent the position of
 569  * the anonymous inner struct inside the resulting firm struct)
 570  */
 571 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 572                                      size_t *outer_offset, size_t *outer_align,
 573                                      bool incomplete, bool is_union)
 574 {
 575         compound_t *compound = type->compound;
 576
 577         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 578                 return compound->irtype;
 579         }
 580
 581         size_t align_all  = 1;
 582         size_t offset     = 0;
 583         size_t bit_offset = 0;
 584         size_t size       = 0;
 585
 586         if (irtype == NULL) {
 587                 symbol_t *symbol = compound->base.symbol;
 588                 ident    *id;
 589                 if (symbol != NULL) {
 590                         id = new_id_from_str(symbol->string);
 591                 } else {
 592                         if (is_union) {
 593                                 id = id_unique("__anonymous_union.%u");
 594                         } else {
 595                                 id = id_unique("__anonymous_struct.%u");
 596                         }
 597                 }
 598                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 599
 600                 if (is_union) {
 601                         irtype = new_d_type_union(id, dbgi);
 602                 } else {
 603                         irtype = new_d_type_struct(id, dbgi);
 604                 }
 605
 606                 compound->irtype_complete = false;
 607                 compound->irtype          = irtype;
 608         } else {
 609                 offset    = *outer_offset;
 610                 align_all = *outer_align;
 611         }
 612
 613         if (incomplete)
 614                 return irtype;
 615
 616         compound->irtype_complete = true;
 617
 618         entity_t *entry = compound->members.entities;
 619         for ( ; entry != NULL; entry = entry->base.next) {
 620                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 621                         continue;
 622
 623                 size_t prev_offset = offset;
 624
 625                 symbol_t *symbol     = entry->base.symbol;
 626                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 627                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 628
 629                 ident    *ident;
 630                 if (symbol != NULL) {
 631                         ident = new_id_from_str(symbol->string);
 632                 } else {
 633                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 634                                 create_compound_type(&entry_type->compound, irtype, &offset,
 635                                                      &align_all, false, COMPOUND_IS_STRUCT);
 636                                 goto finished_member;
 637                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 638                                 create_compound_type(&entry_type->compound, irtype, &offset,
 639                                                      &align_all, false, COMPOUND_IS_UNION);
 640                                 goto finished_member;
 641                         } else {
 642                                 assert(entry_type->kind == TYPE_BITFIELD);
 643                         }
 644                         ident = id_unique("anon.%u");
 645                 }
 646
 647                 ir_type *base_irtype;
 648                 if (entry_type->kind == TYPE_BITFIELD) {
 649                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 650                 } else {
 651                         base_irtype = get_ir_type(entry_type);
 652                 }
 653
 654                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 655                 size_t misalign        = offset % entry_alignment;
 656
 657                 ir_type   *entry_irtype = get_ir_type(entry_type);
 658                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 659
 660                 size_t base;
 661                 size_t bits_remainder;
 662                 if (entry_type->kind == TYPE_BITFIELD) {
 663                         size_t size_bits      = entry_type->bitfield.bit_size;
 664                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 665
 666                         if (size_bits > rest_size_bits) {
 667                                 /* start a new bucket */
 668                                 offset     += entry_alignment - misalign;
 669                                 bit_offset  = 0;
 670
 671                                 base           = offset;
 672                                 bits_remainder = 0;
 673                         } else {
 674                                 /* put into current bucket */
 675                                 base           = offset - misalign;
 676                                 bits_remainder = misalign * 8 + bit_offset;
 677                         }
 678
 679                         offset     += size_bits / 8;
 680                         bit_offset  = bit_offset + (size_bits % 8);
 681                 } else {
 682                         size_t entry_size = get_type_size_bytes(base_irtype);
 683                         if (misalign > 0 || bit_offset > 0)
 684                                 offset += entry_alignment - misalign;
 685
 686                         base           = offset;
 687                         bits_remainder = 0;
 688                         offset        += entry_size;
 689                         bit_offset     = 0;
 690                 }
 691
 692                 if (entry_alignment > align_all) {
 693                         if (entry_alignment % align_all != 0) {
 694                                 panic("uneven alignments not supported yet");
 695                         }
 696                         align_all = entry_alignment;
 697                 }
 698
 699                 set_entity_offset(entity, base);
 700                 set_entity_offset_bits_remainder(entity,
 701                                                  (unsigned char) bits_remainder);
 702                 //add_struct_member(irtype, entity);
 703                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 704                 assert(entry->compound_member.entity == NULL);
 705                 entry->compound_member.entity = entity;
 706
 707 finished_member:
 708                 if (is_union) {
 709                         size_t entry_size = offset - prev_offset;
 710                         if (entry_size > size) {
 711                                 size = entry_size;
 712                         }
 713                         offset     = 0;
 714                         bit_offset = 0;
 715                 }
 716         }
 717
 718         if (!is_union) {
 719                 size = offset;
 720         }
 721
 722         size_t misalign = offset % align_all;
 723         if (misalign > 0 || bit_offset > 0) {
 724                 size += align_all - misalign;
 725         }
 726
 727         if (outer_offset != NULL) {
 728                 if (!is_union) {
 729                         *outer_offset = offset;
 730                 } else {
 731                         *outer_offset += size;
 732                 }
 733
 734                 if (align_all > *outer_align) {
 735                         if (align_all % *outer_align != 0) {
 736                                 panic("uneven alignments not supported yet");
 737                         }
 738                         *outer_align = align_all;
 739                 }
 740         } else {
 741                 set_type_alignment_bytes(irtype, align_all);
 742                 set_type_size_bytes(irtype, size);
 743                 set_type_state(irtype, layout_fixed);
 744         }
 745
 746         return irtype;
 747 }
 748
 749 static ir_type *create_enum_type(enum_type_t *const type)
 750 {
 751         type->base.firm_type = ir_type_int;
 752
 753         ir_mode *const mode    = mode_int;
 754         tarval  *const one     = get_mode_one(mode);
 755         tarval  *      tv_next = get_tarval_null(mode);
 756
 757         bool constant_folding_old = constant_folding;
 758         constant_folding = true;
 759
 760         enum_t   *enume = type->enume;
 761         entity_t *entry = enume->base.next;
 762         for (; entry != NULL; entry = entry->base.next) {
 763                 if (entry->kind != ENTITY_ENUM_VALUE)
 764                         break;
 765
 766                 expression_t *const init = entry->enum_value.value;
 767                 if (init != NULL) {
 768                         ir_node *const cnst = expression_to_firm(init);
 769                         if (!is_Const(cnst)) {
 770                                 panic("couldn't fold constant");
 771                         }
 772                         tv_next = get_Const_tarval(cnst);
 773                 }
 774                 entry->enum_value.tv = tv_next;
 775                 tv_next = tarval_add(tv_next, one);
 776         }
 777
 778         constant_folding = constant_folding_old;
 779
 780         return ir_type_int;
 781 }
 782
 783 static ir_type *get_ir_type_incomplete(type_t *type)
 784 {
 785         assert(type != NULL);
 786         type = skip_typeref(type);
 787
 788         if (type->base.firm_type != NULL) {
 789                 assert(type->base.firm_type != INVALID_TYPE);
 790                 return type->base.firm_type;
 791         }
 792
 793         switch (type->kind) {
 794         case TYPE_COMPOUND_STRUCT:
 795                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 796                                             true, COMPOUND_IS_STRUCT);
 797         case TYPE_COMPOUND_UNION:
 798                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 799                                             true, COMPOUND_IS_UNION);
 800         default:
 801                 return get_ir_type(type);
 802         }
 803 }
 804
 805 ir_type *get_ir_type(type_t *type)
 806 {
 807         assert(type != NULL);
 808
 809         type = skip_typeref(type);
 810
 811         if (type->base.firm_type != NULL) {
 812                 assert(type->base.firm_type != INVALID_TYPE);
 813                 return type->base.firm_type;
 814         }
 815
 816         ir_type *firm_type = NULL;
 817         switch (type->kind) {
 818         case TYPE_ERROR:
 819                 /* Happens while constant folding, when there was an error */
 820                 return create_atomic_type(&type_void->atomic);
 821
 822         case TYPE_ATOMIC:
 823                 firm_type = create_atomic_type(&type->atomic);
 824                 break;
 825         case TYPE_COMPLEX:
 826                 firm_type = create_complex_type(&type->complex);
 827                 break;
 828         case TYPE_IMAGINARY:
 829                 firm_type = create_imaginary_type(&type->imaginary);
 830                 break;
 831         case TYPE_FUNCTION:
 832                 firm_type = create_method_type(&type->function);
 833                 break;
 834         case TYPE_POINTER:
 835                 firm_type = create_pointer_type(&type->pointer);
 836                 break;
 837         case TYPE_ARRAY:
 838                 firm_type = create_array_type(&type->array);
 839                 break;
 840         case TYPE_COMPOUND_STRUCT:
 841                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 842                                                  false, COMPOUND_IS_STRUCT);
 843                 break;
 844         case TYPE_COMPOUND_UNION:
 845                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 846                                                  false, COMPOUND_IS_UNION);
 847                 break;
 848         case TYPE_ENUM:
 849                 firm_type = create_enum_type(&type->enumt);
 850                 break;
 851         case TYPE_BUILTIN:
 852                 firm_type = get_ir_type(type->builtin.real_type);
 853                 break;
 854         case TYPE_BITFIELD:
 855                 firm_type = create_bitfield_type(&type->bitfield);
 856                 break;
 857
 858         case TYPE_TYPEOF:
 859         case TYPE_TYPEDEF:
 860         case TYPE_INVALID:
 861                 break;
 862         }
 863         if (firm_type == NULL)
 864                 panic("unknown type found");
 865
 866         type->base.firm_type = firm_type;
 867         return firm_type;
 868 }
 869
 870 ir_mode *get_ir_mode(type_t *type)
 871 {
 872         ir_type *irtype = get_ir_type(type);
 873
 874         /* firm doesn't report a mode for arrays somehow... */
 875         if (is_Array_type(irtype)) {
 876                 return mode_P_data;
 877         }
 878
 879         ir_mode *mode = get_type_mode(irtype);
 880         assert(mode != NULL);
 881         return mode;
 882 }
 883
 884 /** Names of the runtime functions. */
 885 static const struct {
 886         int        id;           /**< the rts id */
 887         int        n_res;        /**< number of return values */
 888         const char *name;        /**< the name of the rts function */
 889         int        n_params;     /**< number of parameters */
 890         unsigned   flags;        /**< language flags */
 891 } rts_data[] = {
 892         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 893         { rts_abort,      0, "abort",        0, _C89 },
 894         { rts_alloca,     1, "alloca",       1, _ALL },
 895         { rts_abs,        1, "abs",          1, _C89 },
 896         { rts_labs,       1, "labs",         1, _C89 },
 897         { rts_llabs,      1, "llabs",        1, _C99 },
 898         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 899
 900         { rts_fabs,       1, "fabs",         1, _C89 },
 901         { rts_sqrt,       1, "sqrt",         1, _C89 },
 902         { rts_cbrt,       1, "cbrt",         1, _C99 },
 903         { rts_exp,        1, "exp",          1, _C89 },
 904         { rts_exp2,       1, "exp2",         1, _C89 },
 905         { rts_exp10,      1, "exp10",        1, _GNUC },
 906         { rts_log,        1, "log",          1, _C89 },
 907         { rts_log2,       1, "log2",         1, _C89 },
 908         { rts_log10,      1, "log10",        1, _C89 },
 909         { rts_pow,        1, "pow",          2, _C89 },
 910         { rts_sin,        1, "sin",          1, _C89 },
 911         { rts_cos,        1, "cos",          1, _C89 },
 912         { rts_tan,        1, "tan",          1, _C89 },
 913         { rts_asin,       1, "asin",         1, _C89 },
 914         { rts_acos,       1, "acos",         1, _C89 },
 915         { rts_atan,       1, "atan",         1, _C89 },
 916         { rts_sinh,       1, "sinh",         1, _C89 },
 917         { rts_cosh,       1, "cosh",         1, _C89 },
 918         { rts_tanh,       1, "tanh",         1, _C89 },
 919
 920         { rts_fabsf,      1, "fabsf",        1, _C99 },
 921         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 922         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 923         { rts_expf,       1, "expf",         1, _C99 },
 924         { rts_exp2f,      1, "exp2f",        1, _C99 },
 925         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 926         { rts_logf,       1, "logf",         1, _C99 },
 927         { rts_log2f,      1, "log2f",        1, _C99 },
 928         { rts_log10f,     1, "log10f",       1, _C99 },
 929         { rts_powf,       1, "powf",         2, _C99 },
 930         { rts_sinf,       1, "sinf",         1, _C99 },
 931         { rts_cosf,       1, "cosf",         1, _C99 },
 932         { rts_tanf,       1, "tanf",         1, _C99 },
 933         { rts_asinf,      1, "asinf",        1, _C99 },
 934         { rts_acosf,      1, "acosf",        1, _C99 },
 935         { rts_atanf,      1, "atanf",        1, _C99 },
 936         { rts_sinhf,      1, "sinhf",        1, _C99 },
 937         { rts_coshf,      1, "coshf",        1, _C99 },
 938         { rts_tanhf,      1, "tanhf",        1, _C99 },
 939
 940         { rts_fabsl,      1, "fabsl",        1, _C99 },
 941         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 942         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 943         { rts_expl,       1, "expl",         1, _C99 },
 944         { rts_exp2l,      1, "exp2l",        1, _C99 },
 945         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 946         { rts_logl,       1, "logl",         1, _C99 },
 947         { rts_log2l,      1, "log2l",        1, _C99 },
 948         { rts_log10l,     1, "log10l",       1, _C99 },
 949         { rts_powl,       1, "powl",         2, _C99 },
 950         { rts_sinl,       1, "sinl",         1, _C99 },
 951         { rts_cosl,       1, "cosl",         1, _C99 },
 952         { rts_tanl,       1, "tanl",         1, _C99 },
 953         { rts_asinl,      1, "asinl",        1, _C99 },
 954         { rts_acosl,      1, "acosl",        1, _C99 },
 955         { rts_atanl,      1, "atanl",        1, _C99 },
 956         { rts_sinhl,      1, "sinhl",        1, _C99 },
 957         { rts_coshl,      1, "coshl",        1, _C99 },
 958         { rts_tanhl,      1, "tanhl",        1, _C99 },
 959
 960         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 961         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 962         { rts_strcmp,     1, "strcmp",       2, _C89 },
 963         { rts_strncmp,    1, "strncmp",      3, _C89 }
 964 };
 965
 966 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 967
 968 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 969
 970 /**
 971  * Handle GNU attributes for entities
 972  *
 973  * @param ent   the entity
 974  * @param decl  the routine declaration
 975  */
 976 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 977 {
 978         assert(is_declaration(entity));
 979         decl_modifiers_t modifiers = entity->declaration.modifiers;
 980         if (modifiers & DM_PURE) {
 981                 /* TRUE if the declaration includes the GNU
 982                    __attribute__((pure)) specifier. */
 983                 set_entity_additional_property(irentity, mtp_property_pure);
 984         }
 985         if (modifiers & DM_CONST) {
 986                 set_entity_additional_property(irentity, mtp_property_const);
 987                 have_const_functions = true;
 988         }
 989         if (modifiers & DM_USED) {
 990                 /* TRUE if the declaration includes the GNU
 991                    __attribute__((used)) specifier. */
 992                 set_entity_stickyness(irentity, stickyness_sticky);
 993         }
 994 }
 995
 996 static bool is_main(entity_t *entity)
 997 {
 998         static symbol_t *sym_main = NULL;
 999         if (sym_main == NULL) {
1000                 sym_main = symbol_table_insert("main");
1001         }
1002
1003         if (entity->base.symbol != sym_main)
1004                 return false;
1005         /* must be in outermost scope */
1006         if (entity->base.parent_scope != &current_translation_unit->scope)
1007                 return false;
1008
1009         return true;
1010 }
1011
1012 /**
1013  * Creates an entity representing a function.
1014  *
1015  * @param declaration  the function declaration
1016  */
1017 static ir_entity *get_function_entity(entity_t *entity)
1018 {
1019         assert(entity->kind == ENTITY_FUNCTION);
1020         if (entity->function.entity != NULL) {
1021                 return entity->function.entity;
1022         }
1023
1024         if (is_main(entity)) {
1025                 /* force main to C linkage */
1026                 type_t *type = entity->declaration.type;
1027                 assert(is_type_function(type));
1028                 if (type->function.linkage != LINKAGE_C) {
1029                         type_t *new_type           = duplicate_type(type);
1030                         new_type->function.linkage = LINKAGE_C;
1031
1032                         type = typehash_insert(new_type);
1033                         if (type != new_type) {
1034                                 obstack_free(type_obst, new_type);
1035                         }
1036                         entity->declaration.type = type;
1037                 }
1038         }
1039
1040         symbol_t *symbol = entity->base.symbol;
1041         ident    *id     = new_id_from_str(symbol->string);
1042
1043         ir_type   *global_type    = get_glob_type();
1044         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1045         bool const has_body       = entity->function.statement != NULL;
1046
1047         /* already an entity defined? */
1048         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1049         if (irentity != NULL) {
1050                 if (get_entity_visibility(irentity) == visibility_external_allocated
1051                                 && has_body) {
1052                         set_entity_visibility(irentity, visibility_external_visible);
1053                 }
1054                 goto entity_created;
1055         }
1056
1057         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1058         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1059         set_entity_ld_ident(irentity, create_ld_ident(entity));
1060
1061         handle_gnu_attributes_ent(irentity, entity);
1062
1063         /* static inline             => local
1064          * extern inline             => local
1065          * inline without definition => local
1066          * inline with definition    => external_visible */
1067         storage_class_tag_t const storage_class
1068                 = (storage_class_tag_t) entity->declaration.storage_class;
1069         bool                const is_inline     = entity->function.is_inline;
1070         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1071                 set_entity_visibility(irentity, visibility_external_visible);
1072         } else if (storage_class == STORAGE_CLASS_STATIC ||
1073                    (is_inline && has_body)) {
1074                 if (!has_body) {
1075                         /* this entity was declared, but is defined nowhere */
1076                         set_entity_peculiarity(irentity, peculiarity_description);
1077                 }
1078                 set_entity_visibility(irentity, visibility_local);
1079         } else if (has_body) {
1080                 set_entity_visibility(irentity, visibility_external_visible);
1081         } else {
1082                 set_entity_visibility(irentity, visibility_external_allocated);
1083         }
1084         set_entity_allocation(irentity, allocation_static);
1085
1086         /* We should check for file scope here, but as long as we compile C only
1087            this is not needed. */
1088         if (! firm_opt.freestanding) {
1089                 /* check for a known runtime function */
1090                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1091                         if (id != rts_idents[i])
1092                                 continue;
1093
1094                         /* ignore those rts functions not necessary needed for current mode */
1095                         if ((c_mode & rts_data[i].flags) == 0)
1096                                 continue;
1097                         assert(rts_entities[rts_data[i].id] == NULL);
1098                         rts_entities[rts_data[i].id] = irentity;
1099                 }
1100         }
1101
1102         entitymap_insert(&entitymap, symbol, irentity);
1103
1104 entity_created:
1105         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1106         entity->function.entity  = irentity;
1107
1108         return irentity;
1109 }
1110
1111 /**
1112  * Creates a Const node representing a constant.
1113  */
1114 static ir_node *const_to_firm(const const_expression_t *cnst)
1115 {
1116         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1117         ir_mode  *mode = get_ir_mode(cnst->base.type);
1118
1119         char    buf[128];
1120         tarval *tv;
1121         size_t  len;
1122         if (mode_is_float(mode)) {
1123                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1124         } else {
1125                 if (mode_is_signed(mode)) {
1126                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1127                 } else {
1128                         len = snprintf(buf, sizeof(buf), "%llu",
1129                                        (unsigned long long) cnst->v.int_value);
1130                 }
1131                 tv = new_tarval_from_str(buf, len, mode);
1132         }
1133
1134         return new_d_Const(dbgi, mode, tv);
1135 }
1136
1137 /**
1138  * Creates a Const node representing a character constant.
1139  */
1140 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1141 {
1142         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1143         ir_mode  *mode = get_ir_mode(cnst->base.type);
1144
1145         long long int v = 0;
1146         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1147                 if (char_is_signed) {
1148                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1149                 } else {
1150                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1151                 }
1152         }
1153         char    buf[128];
1154         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1155         tarval *tv = new_tarval_from_str(buf, len, mode);
1156
1157         return new_d_Const(dbgi, mode, tv);
1158 }
1159
1160 /**
1161  * Creates a Const node representing a wide character constant.
1162  */
1163 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1164 {
1165         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1166         ir_mode  *mode = get_ir_mode(cnst->base.type);
1167
1168         long long int v = cnst->v.wide_character.begin[0];
1169
1170         char    buf[128];
1171         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1172         tarval *tv = new_tarval_from_str(buf, len, mode);
1173
1174         return new_d_Const(dbgi, mode, tv);
1175 }
1176
1177 /**
1178  * Creates a SymConst for a given entity.
1179  *
1180  * @param dbgi    debug info
1181  * @param mode    the (reference) mode for the SymConst
1182  * @param entity  the entity
1183  */
1184 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1185                               ir_entity *entity)
1186 {
1187         assert(entity != NULL);
1188         union symconst_symbol sym;
1189         sym.entity_p = entity;
1190         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1191 }
1192
1193 /**
1194  * Creates a SymConst node representing a string constant.
1195  *
1196  * @param src_pos    the source position of the string constant
1197  * @param id_prefix  a prefix for the name of the generated string constant
1198  * @param value      the value of the string constant
1199  */
1200 static ir_node *string_to_firm(const source_position_t *const src_pos,
1201                                const char *const id_prefix,
1202                                const string_t *const value)
1203 {
1204         ir_type  *const global_type = get_glob_type();
1205         dbg_info *const dbgi        = get_dbg_info(src_pos);
1206         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1207                                                        ir_type_const_char, dbgi);
1208
1209         ident     *const id     = id_unique(id_prefix);
1210         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1211         set_entity_ld_ident(entity, id);
1212         set_entity_variability(entity, variability_constant);
1213         set_entity_allocation(entity, allocation_static);
1214
1215         ir_type *const elem_type = ir_type_const_char;
1216         ir_mode *const mode      = get_type_mode(elem_type);
1217
1218         const char* const string = value->begin;
1219         const size_t      slen   = value->size;
1220
1221         set_array_lower_bound_int(type, 0, 0);
1222         set_array_upper_bound_int(type, 0, slen);
1223         set_type_size_bytes(type, slen);
1224         set_type_state(type, layout_fixed);
1225
1226         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1227         for (size_t i = 0; i < slen; ++i) {
1228                 tvs[i] = new_tarval_from_long(string[i], mode);
1229         }
1230
1231         set_array_entity_values(entity, tvs, slen);
1232         free(tvs);
1233
1234         return create_symconst(dbgi, mode_P_data, entity);
1235 }
1236
1237 /**
1238  * Creates a SymConst node representing a string literal.
1239  *
1240  * @param literal   the string literal
1241  */
1242 static ir_node *string_literal_to_firm(
1243                 const string_literal_expression_t* literal)
1244 {
1245         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1246                               &literal->value);
1247 }
1248
1249 /**
1250  * Creates a SymConst node representing a wide string literal.
1251  *
1252  * @param literal   the wide string literal
1253  */
1254 static ir_node *wide_string_literal_to_firm(
1255         const wide_string_literal_expression_t* const literal)
1256 {
1257         ir_type *const global_type = get_glob_type();
1258         ir_type *const elem_type   = ir_type_wchar_t;
1259         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1260         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1261                                                     elem_type, dbgi);
1262
1263         ident     *const id     = id_unique("Lstr.%u");
1264         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1265         set_entity_ld_ident(entity, id);
1266         set_entity_variability(entity, variability_constant);
1267         set_entity_allocation(entity, allocation_static);
1268
1269         ir_mode *const mode      = get_type_mode(elem_type);
1270
1271         const wchar_rep_t *const string = literal->value.begin;
1272         const size_t             slen   = literal->value.size;
1273
1274         set_array_lower_bound_int(type, 0, 0);
1275         set_array_upper_bound_int(type, 0, slen);
1276         set_type_size_bytes(type, slen);
1277         set_type_state(type, layout_fixed);
1278
1279         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1280         for (size_t i = 0; i < slen; ++i) {
1281                 tvs[i] = new_tarval_from_long(string[i], mode);
1282         }
1283
1284         set_array_entity_values(entity, tvs, slen);
1285         free(tvs);
1286
1287         return create_symconst(dbgi, mode_P_data, entity);
1288 }
1289
1290 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1291                                       ir_node *const addr)
1292 {
1293         ir_type *irtype = get_ir_type(type);
1294         if (is_compound_type(irtype)
1295                         || is_Method_type(irtype)
1296                         || is_Array_type(irtype)) {
1297                 return addr;
1298         }
1299
1300         ir_mode *const mode     = get_type_mode(irtype);
1301         ir_node *const memory   = get_store();
1302         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1303         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1304         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1305
1306         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1307                 set_Load_volatility(load, volatility_is_volatile);
1308         }
1309
1310         set_store(load_mem);
1311         return load_res;
1312 }
1313
1314 /**
1315  * Creates a strict Conv if neccessary.
1316  */
1317 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1318 {
1319         ir_mode *mode = get_irn_mode(node);
1320
1321         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1322                 return node;
1323         if (!mode_is_float(mode))
1324                 return node;
1325
1326         /* check if there is already a Conv */
1327         if (is_Conv(node)) {
1328                 /* convert it into a strict Conv */
1329                 set_Conv_strict(node, 1);
1330                 return node;
1331         }
1332
1333         /* otherwise create a new one */
1334         return new_d_strictConv(dbgi, node, mode);
1335 }
1336
1337 static ir_node *get_global_var_address(dbg_info *const dbgi,
1338                                        const entity_t *const entity)
1339 {
1340         assert(entity->kind == ENTITY_VARIABLE);
1341         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1342
1343         ir_entity *const irentity = entity->variable.v.entity;
1344         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1345                 case STORAGE_CLASS_THREAD:
1346                 case STORAGE_CLASS_THREAD_EXTERN:
1347                 case STORAGE_CLASS_THREAD_STATIC: {
1348                         ir_node *const no_mem = new_NoMem();
1349                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1350                         return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1351                 }
1352
1353                 default:
1354                         return create_symconst(dbgi, mode_P_data, irentity);
1355         }
1356 }
1357
1358 /**
1359  * Returns the correct base address depending on whether it is a parameter or a
1360  * normal local variable.
1361  */
1362 static ir_node *get_local_frame(ir_entity *const ent)
1363 {
1364         ir_graph      *const irg   = current_ir_graph;
1365         const ir_type *const owner = get_entity_owner(ent);
1366         if (owner == get_irg_frame_type(irg)) {
1367                 return get_irg_frame(irg);
1368         } else {
1369                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1370                 return get_irg_value_param_base(irg);
1371         }
1372 }
1373
1374 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1375 {
1376         ir_mode *value_mode = get_irn_mode(value);
1377
1378         if (value_mode == dest_mode || is_Bad(value))
1379                 return value;
1380
1381         if (dest_mode == mode_b) {
1382                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1383                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1384                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1385                 return proj;
1386         }
1387
1388         return new_d_Conv(dbgi, value, dest_mode);
1389 }
1390
1391 /**
1392  * Keep all memory edges of the given block.
1393  */
1394 static void keep_all_memory(ir_node *block) {
1395         ir_node *old = get_cur_block();
1396
1397         set_cur_block(block);
1398         keep_alive(get_store());
1399         /* TODO: keep all memory edges from restricted pointers */
1400         set_cur_block(old);
1401 }
1402
1403 static ir_node *reference_expression_enum_value_to_firm(
1404                 const reference_expression_t *ref)
1405 {
1406         entity_t *entity = ref->entity;
1407         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1408         /* make sure the type is constructed */
1409         (void) get_ir_type(type);
1410
1411         ir_mode *const mode = get_ir_mode(type);
1412         return new_Const(mode, entity->enum_value.tv);
1413 }
1414
1415 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1416 {
1417         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1418         entity_t *entity = ref->entity;
1419         assert(is_declaration(entity));
1420         type_t   *type   = skip_typeref(entity->declaration.type);
1421
1422         /* make sure the type is constructed */
1423         (void) get_ir_type(type);
1424
1425         switch ((declaration_kind_t) entity->declaration.kind) {
1426         case DECLARATION_KIND_UNKNOWN:
1427                 break;
1428
1429         case DECLARATION_KIND_LOCAL_VARIABLE: {
1430                 ir_mode *const mode = get_ir_mode(type);
1431                 return get_value(entity->variable.v.value_number, mode);
1432         }
1433         case DECLARATION_KIND_FUNCTION: {
1434                 ir_mode *const mode = get_ir_mode(type);
1435                 return create_symconst(dbgi, mode, entity->function.entity);
1436         }
1437         case DECLARATION_KIND_INNER_FUNCTION: {
1438                 ir_mode *const mode = get_ir_mode(type);
1439                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1440                         /* inner function not using the closure */
1441                         return create_symconst(dbgi, mode, entity->function.entity);
1442                 } else {
1443                         /* TODO: need trampoline here */
1444                         panic("Trampoline code not implemented");
1445                         return create_symconst(dbgi, mode, entity->function.entity);
1446                 }
1447         }
1448         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1449                 ir_node *const addr = get_global_var_address(dbgi, entity);
1450                 return deref_address(dbgi, entity->declaration.type, addr);
1451         }
1452
1453         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1454                 ir_entity *irentity = entity->variable.v.entity;
1455                 ir_node   *frame    = get_local_frame(irentity);
1456                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1457                 return deref_address(dbgi, entity->declaration.type, sel);
1458         }
1459
1460         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1461                 return entity->variable.v.vla_base;
1462
1463         case DECLARATION_KIND_COMPOUND_MEMBER:
1464                 panic("not implemented reference type");
1465         }
1466
1467         panic("reference to declaration with unknown type found");
1468 }
1469
1470 static ir_node *reference_addr(const reference_expression_t *ref)
1471 {
1472         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1473         entity_t *entity = ref->entity;
1474         assert(is_declaration(entity));
1475
1476         switch((declaration_kind_t) entity->declaration.kind) {
1477         case DECLARATION_KIND_UNKNOWN:
1478                 break;
1479         case DECLARATION_KIND_LOCAL_VARIABLE:
1480                 /* you can store to a local variable (so we don't panic but return NULL
1481                  * as an indicator for no real address) */
1482                 return NULL;
1483         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1484                 ir_node *const addr = get_global_var_address(dbgi, entity);
1485                 return addr;
1486         }
1487         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1488                 ir_entity *irentity = entity->variable.v.entity;
1489                 ir_node   *frame    = get_local_frame(irentity);
1490                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1491
1492                 return sel;
1493         }
1494
1495         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1496                 return entity->variable.v.vla_base;
1497
1498         case DECLARATION_KIND_FUNCTION: {
1499                 type_t  *const type = skip_typeref(entity->declaration.type);
1500                 ir_mode *const mode = get_ir_mode(type);
1501                 return create_symconst(dbgi, mode, entity->function.entity);
1502         }
1503
1504         case DECLARATION_KIND_INNER_FUNCTION:
1505         case DECLARATION_KIND_COMPOUND_MEMBER:
1506                 panic("not implemented reference type");
1507         }
1508
1509         panic("reference to declaration with unknown type found");
1510 }
1511
1512 /**
1513  * Transform calls to builtin functions.
1514  */
1515 static ir_node *process_builtin_call(const call_expression_t *call)
1516 {
1517         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1518
1519         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1520         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1521
1522         type_t *type = skip_typeref(builtin->base.type);
1523         assert(is_type_pointer(type));
1524
1525         type_t   *function_type = skip_typeref(type->pointer.points_to);
1526         symbol_t *symbol        = builtin->symbol;
1527
1528         switch(symbol->ID) {
1529         case T___builtin_alloca: {
1530                 if (call->arguments == NULL || call->arguments->next != NULL) {
1531                         panic("invalid number of parameters on __builtin_alloca");
1532                 }
1533                 expression_t *argument = call->arguments->expression;
1534                 ir_node      *size     = expression_to_firm(argument);
1535
1536                 ir_node *store  = get_store();
1537                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1538                                               stack_alloc);
1539                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1540                 set_store(proj_m);
1541                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1542
1543                 return res;
1544         }
1545
1546         case T___builtin_huge_val:
1547         case T___builtin_inf:
1548         case T___builtin_inff:
1549         case T___builtin_infl: {
1550                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1551                 tarval  *tv   = get_mode_infinite(mode);
1552                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1553                 return   res;
1554         }
1555         case T___builtin_nan:
1556         case T___builtin_nanf:
1557         case T___builtin_nanl: {
1558                 /* Ignore string for now... */
1559                 assert(is_type_function(function_type));
1560                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1561                 tarval  *tv   = get_mode_NAN(mode);
1562                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1563                 return res;
1564         }
1565         case T___builtin_va_end:
1566                 return NULL;
1567         default:
1568                 panic("Unsupported builtin found\n");
1569         }
1570 }
1571
1572 /**
1573  * Transform a call expression.
1574  * Handles some special cases, like alloca() calls, which must be resolved
1575  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1576  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1577  * handled right...
1578  */
1579 static ir_node *call_expression_to_firm(const call_expression_t *call)
1580 {
1581         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1582         assert(get_cur_block() != NULL);
1583
1584         expression_t *function = call->function;
1585         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1586                 return process_builtin_call(call);
1587         }
1588         if (function->kind == EXPR_REFERENCE) {
1589                 const reference_expression_t *ref    = &function->reference;
1590                 entity_t                     *entity = ref->entity;
1591
1592                 if (entity->kind == ENTITY_FUNCTION
1593                                 && entity->function.entity == rts_entities[rts_alloca]) {
1594                         /* handle alloca() call */
1595                         expression_t *argument = call->arguments->expression;
1596                         ir_node      *size     = expression_to_firm(argument);
1597
1598                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1599
1600                         ir_node  *store  = get_store();
1601                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1602                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1603                                                        stack_alloc);
1604                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1605                         set_store(proj_m);
1606                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1607
1608                         return res;
1609                 }
1610         }
1611         ir_node *callee = expression_to_firm(function);
1612
1613         type_t *type = skip_typeref(function->base.type);
1614         assert(is_type_pointer(type));
1615         pointer_type_t *pointer_type = &type->pointer;
1616         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1617         assert(is_type_function(points_to));
1618         function_type_t *function_type = &points_to->function;
1619
1620         int      n_parameters = 0;
1621         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1622         ir_type *new_method_type = NULL;
1623         if (function_type->variadic || function_type->unspecified_parameters) {
1624                 const call_argument_t *argument = call->arguments;
1625                 for ( ; argument != NULL; argument = argument->next) {
1626                         ++n_parameters;
1627                 }
1628
1629                 /* we need to construct a new method type matching the call
1630                  * arguments... */
1631                 int n_res       = get_method_n_ress(ir_method_type);
1632                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1633                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1634                                                     n_parameters, n_res, dbgi);
1635                 set_method_calling_convention(new_method_type,
1636                                get_method_calling_convention(ir_method_type));
1637                 set_method_additional_properties(new_method_type,
1638                                get_method_additional_properties(ir_method_type));
1639                 set_method_variadicity(new_method_type,
1640                                        get_method_variadicity(ir_method_type));
1641
1642                 for (int i = 0; i < n_res; ++i) {
1643                         set_method_res_type(new_method_type, i,
1644                                             get_method_res_type(ir_method_type, i));
1645                 }
1646                 argument = call->arguments;
1647                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1648                         expression_t *expression = argument->expression;
1649                         ir_type      *irtype     = get_ir_type(expression->base.type);
1650                         set_method_param_type(new_method_type, i, irtype);
1651                 }
1652                 ir_method_type = new_method_type;
1653         } else {
1654                 n_parameters = get_method_n_params(ir_method_type);
1655         }
1656
1657         ir_node *in[n_parameters];
1658
1659         const call_argument_t *argument = call->arguments;
1660         for (int n = 0; n < n_parameters; ++n) {
1661                 expression_t *expression = argument->expression;
1662                 ir_node      *arg_node   = expression_to_firm(expression);
1663
1664                 arg_node = do_strict_conv(dbgi, arg_node);
1665
1666                 in[n] = arg_node;
1667
1668                 argument = argument->next;
1669         }
1670
1671         ir_node  *store = get_store();
1672         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1673                                      ir_method_type);
1674         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1675         set_store(mem);
1676
1677         type_t  *return_type = skip_typeref(function_type->return_type);
1678         ir_node *result      = NULL;
1679
1680         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1681                 ir_mode *mode;
1682                 if (is_type_scalar(return_type)) {
1683                         mode = get_ir_mode(return_type);
1684                 } else {
1685                         mode = mode_P_data;
1686                 }
1687                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1688                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1689         }
1690
1691         if (function->kind == EXPR_REFERENCE &&
1692             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1693                 /* A dead end:  Keep the Call and the Block.  Also place all further
1694                  * nodes into a new and unreachable block. */
1695                 keep_alive(node);
1696                 keep_alive(get_cur_block());
1697                 new_Block(0, NULL);
1698         }
1699
1700         return result;
1701 }
1702
1703 static void statement_to_firm(statement_t *statement);
1704 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1705
1706 static ir_node *expression_to_addr(const expression_t *expression);
1707 static ir_node *create_condition_evaluation(const expression_t *expression,
1708                                             ir_node *true_block,
1709                                             ir_node *false_block);
1710
1711 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1712                          ir_node *value)
1713 {
1714         value = do_strict_conv(dbgi, value);
1715
1716         ir_node *memory = get_store();
1717
1718         if (is_type_scalar(type)) {
1719                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1720                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1721                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1722                         set_Store_volatility(store, volatility_is_volatile);
1723                 set_store(store_mem);
1724         } else {
1725                 ir_type *irtype    = get_ir_type(type);
1726                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1727                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1728                 set_store(copyb_mem);
1729         }
1730 }
1731
1732 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1733 {
1734         tarval *all_one   = get_mode_all_one(mode);
1735         int     mode_size = get_mode_size_bits(mode);
1736
1737         assert(offset >= 0);
1738         assert(size   >= 0);
1739         assert(offset + size <= mode_size);
1740         if (size == mode_size) {
1741                 return all_one;
1742         }
1743
1744         long    shiftr    = get_mode_size_bits(mode) - size;
1745         long    shiftl    = offset;
1746         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1747         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1748         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1749         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1750
1751         return mask1;
1752 }
1753
1754 static void bitfield_store_to_firm(dbg_info *dbgi,
1755                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1756 {
1757         ir_type *entity_type = get_entity_type(entity);
1758         ir_type *base_type   = get_primitive_base_type(entity_type);
1759         assert(base_type != NULL);
1760         ir_mode *mode        = get_type_mode(base_type);
1761
1762         value = create_conv(dbgi, value, mode);
1763
1764         /* kill upper bits of value and shift to right position */
1765         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1766         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1767
1768         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1769         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1770         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1771         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1772         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1773         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1774
1775         /* load current value */
1776         ir_node  *mem             = get_store();
1777         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1778         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1779         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1780         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1781         tarval   *inv_mask        = tarval_not(shift_mask);
1782         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1783         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1784
1785         /* construct new value and store */
1786         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1787         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1788         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1789         set_store(store_mem);
1790
1791         if (set_volatile) {
1792                 set_Load_volatility(load, volatility_is_volatile);
1793                 set_Store_volatility(store, volatility_is_volatile);
1794         }
1795 }
1796
1797 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1798                 ir_node *addr)
1799 {
1800         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1801         type_t   *type     = expression->base.type;
1802         ir_mode  *mode     = get_ir_mode(type);
1803         ir_node  *mem      = get_store();
1804         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1805         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1806         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1807
1808         load_res           = create_conv(dbgi, load_res, mode_int);
1809
1810         set_store(load_mem);
1811
1812         /* kill upper bits */
1813         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1814         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1815         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1816         ir_type   *entity_type  = get_entity_type(entity);
1817         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1818         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1819         assert(shift_bitsl >= 0);
1820         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1821         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1822         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1823
1824         long       shift_bitsr  = bitoffset + shift_bitsl;
1825         assert(shift_bitsr <= (long) machine_size);
1826         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1827         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1828         ir_node   *shiftr;
1829         if (mode_is_signed(mode)) {
1830                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1831         } else {
1832                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1833         }
1834
1835         return create_conv(dbgi, shiftr, mode);
1836 }
1837
1838 /* make sure the selected compound type is constructed */
1839 static void construct_select_compound(const select_expression_t *expression)
1840 {
1841         type_t *type = skip_typeref(expression->compound->base.type);
1842         if (is_type_pointer(type)) {
1843                 type = type->pointer.points_to;
1844         }
1845         (void) get_ir_type(type);
1846 }
1847
1848 static void set_value_for_expression_addr(const expression_t *expression,
1849                                           ir_node *value, ir_node *addr)
1850 {
1851         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1852         value          = do_strict_conv(dbgi, value);
1853
1854         if (expression->kind == EXPR_REFERENCE) {
1855                 const reference_expression_t *ref = &expression->reference;
1856
1857                 entity_t *entity = ref->entity;
1858                 assert(is_declaration(entity));
1859                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1860                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1861                         set_value(entity->variable.v.value_number, value);
1862                         return;
1863                 }
1864         }
1865
1866         if (addr == NULL)
1867                 addr = expression_to_addr(expression);
1868
1869         type_t *type = skip_typeref(expression->base.type);
1870
1871         if (expression->kind == EXPR_SELECT) {
1872                 const select_expression_t *select = &expression->select;
1873
1874                 construct_select_compound(select);
1875
1876                 entity_t *entity = select->compound_entry;
1877                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1878                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1879                         ir_entity *irentity = entity->compound_member.entity;
1880                         bool       set_volatile
1881                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1882                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1883                         return;
1884                 }
1885         }
1886
1887         assign_value(dbgi, addr, type, value);
1888 }
1889
1890 static void set_value_for_expression(const expression_t *expression,
1891                                      ir_node *value)
1892 {
1893         set_value_for_expression_addr(expression, value, NULL);
1894 }
1895
1896 static ir_node *get_value_from_lvalue(const expression_t *expression,
1897                                       ir_node *addr)
1898 {
1899         if (expression->kind == EXPR_REFERENCE) {
1900                 const reference_expression_t *ref = &expression->reference;
1901
1902                 entity_t *entity = ref->entity;
1903                 assert(entity->kind == ENTITY_VARIABLE);
1904                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1905                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1906                         assert(addr == NULL);
1907                         ir_mode *mode = get_ir_mode(expression->base.type);
1908                         return get_value(entity->variable.v.value_number, mode);
1909                 }
1910         }
1911
1912         assert(addr != NULL);
1913         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1914
1915         ir_node *value;
1916         if (expression->kind == EXPR_SELECT &&
1917             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1918             construct_select_compound(&expression->select);
1919                 value = bitfield_extract_to_firm(&expression->select, addr);
1920         } else {
1921                 value = deref_address(dbgi, expression->base.type, addr);
1922         }
1923
1924         return value;
1925 }
1926
1927
1928 static ir_node *create_incdec(const unary_expression_t *expression)
1929 {
1930         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1931         const expression_t *value_expr = expression->value;
1932         ir_node            *addr       = expression_to_addr(value_expr);
1933         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1934
1935         type_t  *type = skip_typeref(expression->base.type);
1936         ir_mode *mode = get_ir_mode(expression->base.type);
1937
1938         ir_node *offset;
1939         if (is_type_pointer(type)) {
1940                 pointer_type_t *pointer_type = &type->pointer;
1941                 offset                       = get_type_size(pointer_type->points_to);
1942         } else {
1943                 assert(is_type_arithmetic(type));
1944                 offset = new_Const(mode, get_mode_one(mode));
1945         }
1946
1947         ir_node *result;
1948         ir_node *store_value;
1949         switch(expression->base.kind) {
1950         case EXPR_UNARY_POSTFIX_INCREMENT:
1951                 result      = value;
1952                 store_value = new_d_Add(dbgi, value, offset, mode);
1953                 break;
1954         case EXPR_UNARY_POSTFIX_DECREMENT:
1955                 result      = value;
1956                 store_value = new_d_Sub(dbgi, value, offset, mode);
1957                 break;
1958         case EXPR_UNARY_PREFIX_INCREMENT:
1959                 result      = new_d_Add(dbgi, value, offset, mode);
1960                 store_value = result;
1961                 break;
1962         case EXPR_UNARY_PREFIX_DECREMENT:
1963                 result      = new_d_Sub(dbgi, value, offset, mode);
1964                 store_value = result;
1965                 break;
1966         default:
1967                 panic("no incdec expr in create_incdec");
1968         }
1969
1970         set_value_for_expression_addr(value_expr, store_value, addr);
1971
1972         return result;
1973 }
1974
1975 static bool is_local_variable(expression_t *expression)
1976 {
1977         if (expression->kind != EXPR_REFERENCE)
1978                 return false;
1979         reference_expression_t *ref_expr = &expression->reference;
1980         entity_t               *entity   = ref_expr->entity;
1981         if (entity->kind != ENTITY_VARIABLE)
1982                 return false;
1983         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1984         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
1985 }
1986
1987 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1988 {
1989         switch(kind) {
1990         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1991         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1992         case EXPR_BINARY_NOTEQUAL:
1993                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1994         case EXPR_BINARY_ISLESS:
1995         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1996         case EXPR_BINARY_ISLESSEQUAL:
1997         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1998         case EXPR_BINARY_ISGREATER:
1999         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2000         case EXPR_BINARY_ISGREATEREQUAL:
2001         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2002         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2003
2004         default:
2005                 break;
2006         }
2007         panic("trying to get pn_Cmp from non-comparison binexpr type");
2008 }
2009
2010 /**
2011  * Handle the assume optimizer hint: check if a Confirm
2012  * node can be created.
2013  *
2014  * @param dbi    debug info
2015  * @param expr   the IL assume expression
2016  *
2017  * we support here only some simple cases:
2018  *  - var rel const
2019  *  - const rel val
2020  *  - var rel var
2021  */
2022 static ir_node *handle_assume_compare(dbg_info *dbi,
2023                                       const binary_expression_t *expression)
2024 {
2025         expression_t *op1 = expression->left;
2026         expression_t *op2 = expression->right;
2027         entity_t     *var2, *var = NULL;
2028         ir_node      *res = NULL;
2029         pn_Cmp        cmp_val;
2030
2031         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2032
2033         if (is_local_variable(op1) && is_local_variable(op2)) {
2034         var  = op1->reference.entity;
2035             var2 = op2->reference.entity;
2036
2037                 type_t  *const type = skip_typeref(var->declaration.type);
2038                 ir_mode *const mode = get_ir_mode(type);
2039
2040                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2041                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2042
2043                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2044                 set_value(var2->variable.v.value_number, res);
2045
2046                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2047                 set_value(var->variable.v.value_number, res);
2048
2049                 return res;
2050         }
2051
2052         expression_t *con;
2053         if (is_local_variable(op1) && is_constant_expression(op2)) {
2054                 var = op1->reference.entity;
2055                 con = op2;
2056         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2057                 cmp_val = get_inversed_pnc(cmp_val);
2058                 var = op2->reference.entity;
2059                 con = op1;
2060         }
2061
2062         if (var != NULL) {
2063                 type_t  *const type = skip_typeref(var->declaration.type);
2064                 ir_mode *const mode = get_ir_mode(type);
2065
2066                 res = get_value(var->variable.v.value_number, mode);
2067                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2068                 set_value(var->variable.v.value_number, res);
2069         }
2070         return res;
2071 }
2072
2073 /**
2074  * Handle the assume optimizer hint.
2075  *
2076  * @param dbi    debug info
2077  * @param expr   the IL assume expression
2078  */
2079 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2080         switch(expression->kind) {
2081         case EXPR_BINARY_EQUAL:
2082         case EXPR_BINARY_NOTEQUAL:
2083         case EXPR_BINARY_LESS:
2084         case EXPR_BINARY_LESSEQUAL:
2085         case EXPR_BINARY_GREATER:
2086         case EXPR_BINARY_GREATEREQUAL:
2087                 return handle_assume_compare(dbi, &expression->binary);
2088         default:
2089                 return NULL;
2090         }
2091 }
2092
2093 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2094 {
2095         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2096         type_t   *type = skip_typeref(expression->base.type);
2097
2098         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2099                 return expression_to_addr(expression->value);
2100
2101         const expression_t *value = expression->value;
2102
2103         switch(expression->base.kind) {
2104         case EXPR_UNARY_NEGATE: {
2105                 ir_node *value_node = expression_to_firm(value);
2106                 ir_mode *mode = get_ir_mode(type);
2107                 return new_d_Minus(dbgi, value_node, mode);
2108         }
2109         case EXPR_UNARY_PLUS:
2110                 return expression_to_firm(value);
2111         case EXPR_UNARY_BITWISE_NEGATE: {
2112                 ir_node *value_node = expression_to_firm(value);
2113                 ir_mode *mode = get_ir_mode(type);
2114                 return new_d_Not(dbgi, value_node, mode);
2115         }
2116         case EXPR_UNARY_NOT: {
2117                 ir_node *value_node = _expression_to_firm(value);
2118                 value_node          = create_conv(dbgi, value_node, mode_b);
2119                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2120                 return res;
2121         }
2122         case EXPR_UNARY_DEREFERENCE: {
2123                 ir_node *value_node = expression_to_firm(value);
2124                 type_t  *value_type = skip_typeref(value->base.type);
2125                 assert(is_type_pointer(value_type));
2126                 type_t  *points_to  = value_type->pointer.points_to;
2127                 return deref_address(dbgi, points_to, value_node);
2128         }
2129         case EXPR_UNARY_POSTFIX_INCREMENT:
2130         case EXPR_UNARY_POSTFIX_DECREMENT:
2131         case EXPR_UNARY_PREFIX_INCREMENT:
2132         case EXPR_UNARY_PREFIX_DECREMENT:
2133                 return create_incdec(expression);
2134         case EXPR_UNARY_CAST: {
2135                 ir_node *value_node = expression_to_firm(value);
2136                 if (is_type_scalar(type)) {
2137                         ir_mode *mode = get_ir_mode(type);
2138                         ir_node *node = create_conv(dbgi, value_node, mode);
2139                         node = do_strict_conv(dbgi, node);
2140                         return node;
2141                 } else {
2142                         /* make sure firm type is constructed */
2143                         (void) get_ir_type(type);
2144                         return value_node;
2145                 }
2146         }
2147         case EXPR_UNARY_CAST_IMPLICIT: {
2148                 ir_node *value_node = expression_to_firm(value);
2149                 if (is_type_scalar(type)) {
2150                         ir_mode *mode = get_ir_mode(type);
2151                         return create_conv(dbgi, value_node, mode);
2152                 } else {
2153                         return value_node;
2154                 }
2155         }
2156         case EXPR_UNARY_ASSUME:
2157                 if (firm_opt.confirm)
2158                         return handle_assume(dbgi, value);
2159                 else
2160                         return NULL;
2161
2162         default:
2163                 break;
2164         }
2165         panic("invalid UNEXPR type found");
2166 }
2167
2168 /**
2169  * produces a 0/1 depending of the value of a mode_b node
2170  */
2171 static ir_node *produce_condition_result(const expression_t *expression,
2172                                          dbg_info *dbgi)
2173 {
2174         ir_mode *mode      = get_ir_mode(expression->base.type);
2175         ir_node *cur_block = get_cur_block();
2176
2177         ir_node *one_block = new_immBlock();
2178         ir_node *one       = new_Const(mode, get_mode_one(mode));
2179         ir_node *jmp_one   = new_d_Jmp(dbgi);
2180
2181         ir_node *zero_block = new_immBlock();
2182         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2183         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2184
2185         set_cur_block(cur_block);
2186         create_condition_evaluation(expression, one_block, zero_block);
2187         mature_immBlock(one_block);
2188         mature_immBlock(zero_block);
2189
2190         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2191         new_Block(2, in_cf);
2192
2193         ir_node *in[2] = { one, zero };
2194         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2195
2196         return val;
2197 }
2198
2199 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2200                 ir_node *value, type_t *type)
2201 {
2202         pointer_type_t *const pointer_type = &type->pointer;
2203         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2204         unsigned              elem_size    = get_type_size_const(points_to);
2205
2206         /* gcc extension: allow arithmetic with void * and function * */
2207         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2208             is_type_function(points_to))  {
2209                 elem_size = 1;
2210         }
2211
2212         assert(elem_size >= 1);
2213         if (elem_size == 1)
2214                 return value;
2215
2216         value = create_conv(dbgi, value, mode_int);
2217         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2218         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2219         return mul;
2220 }
2221
2222 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2223                           ir_node *left, ir_node *right)
2224 {
2225         ir_mode  *mode;
2226         type_t   *type_left  = skip_typeref(expression->left->base.type);
2227         type_t   *type_right = skip_typeref(expression->right->base.type);
2228
2229         expression_kind_t kind = expression->base.kind;
2230
2231         switch (kind) {
2232         case EXPR_BINARY_SHIFTLEFT:
2233         case EXPR_BINARY_SHIFTRIGHT:
2234         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2235         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2236                 mode  = get_irn_mode(left);
2237                 right = create_conv(dbgi, right, mode_uint);
2238                 break;
2239
2240         case EXPR_BINARY_SUB:
2241                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2242                         const pointer_type_t *const ptr_type = &type_left->pointer;
2243
2244                         mode = get_ir_mode(expression->base.type);
2245                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2246                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2247                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2248                         ir_node *const no_mem    = new_NoMem();
2249                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2250                                                                                                    mode, op_pin_state_floats);
2251                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2252                 }
2253                 /* fallthrough */
2254         case EXPR_BINARY_SUB_ASSIGN:
2255                 if (is_type_pointer(type_left)) {
2256                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2257                         mode  = get_ir_mode(type_left);
2258                         break;
2259                 }
2260                 goto normal_node;
2261
2262         case EXPR_BINARY_ADD:
2263         case EXPR_BINARY_ADD_ASSIGN:
2264                 if (is_type_pointer(type_left)) {
2265                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2266                         mode  = get_ir_mode(type_left);
2267                         break;
2268                 } else if (is_type_pointer(type_right)) {
2269                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2270                         mode  = get_ir_mode(type_right);
2271                         break;
2272                 }
2273                 goto normal_node;
2274
2275         default:
2276 normal_node:
2277                 mode = get_irn_mode(right);
2278                 left = create_conv(dbgi, left, mode);
2279                 break;
2280         }
2281
2282         switch (kind) {
2283         case EXPR_BINARY_ADD_ASSIGN:
2284         case EXPR_BINARY_ADD:
2285                 return new_d_Add(dbgi, left, right, mode);
2286         case EXPR_BINARY_SUB_ASSIGN:
2287         case EXPR_BINARY_SUB:
2288                 return new_d_Sub(dbgi, left, right, mode);
2289         case EXPR_BINARY_MUL_ASSIGN:
2290         case EXPR_BINARY_MUL:
2291                 return new_d_Mul(dbgi, left, right, mode);
2292         case EXPR_BINARY_BITWISE_AND:
2293         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2294                 return new_d_And(dbgi, left, right, mode);
2295         case EXPR_BINARY_BITWISE_OR:
2296         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2297                 return new_d_Or(dbgi, left, right, mode);
2298         case EXPR_BINARY_BITWISE_XOR:
2299         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2300                 return new_d_Eor(dbgi, left, right, mode);
2301         case EXPR_BINARY_SHIFTLEFT:
2302         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2303                 return new_d_Shl(dbgi, left, right, mode);
2304         case EXPR_BINARY_SHIFTRIGHT:
2305         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2306                 if (mode_is_signed(mode)) {
2307                         return new_d_Shrs(dbgi, left, right, mode);
2308                 } else {
2309                         return new_d_Shr(dbgi, left, right, mode);
2310                 }
2311         case EXPR_BINARY_DIV:
2312         case EXPR_BINARY_DIV_ASSIGN: {
2313                 ir_node *pin = new_Pin(new_NoMem());
2314                 ir_node *op;
2315                 ir_node *res;
2316                 if (mode_is_float(mode)) {
2317                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2318                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2319                 } else {
2320                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2321                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2322                 }
2323                 return res;
2324         }
2325         case EXPR_BINARY_MOD:
2326         case EXPR_BINARY_MOD_ASSIGN: {
2327                 ir_node *pin = new_Pin(new_NoMem());
2328                 assert(!mode_is_float(mode));
2329                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2330                                          op_pin_state_floats);
2331                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2332                 return res;
2333         }
2334         default:
2335                 panic("unexpected expression kind");
2336         }
2337 }
2338
2339 static ir_node *create_lazy_op(const binary_expression_t *expression)
2340 {
2341         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2342         type_t   *type = expression->base.type;
2343         ir_mode  *mode = get_ir_mode(type);
2344
2345         if (is_constant_expression(expression->left)) {
2346                 long val = fold_constant(expression->left);
2347                 expression_kind_t ekind = expression->base.kind;
2348                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2349                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2350                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2351                         return expression_to_firm(expression->right);
2352                 } else {
2353                         return new_Const(mode, get_mode_one(mode));
2354                 }
2355         }
2356
2357         return produce_condition_result((const expression_t*) expression, dbgi);
2358 }
2359
2360 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2361                                             ir_node *right, ir_mode *mode);
2362
2363 static ir_node *create_assign_binop(const binary_expression_t *expression)
2364 {
2365         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2366         const expression_t *left_expr = expression->left;
2367         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2368         ir_node            *right     = expression_to_firm(expression->right);
2369         ir_node            *left_addr = expression_to_addr(left_expr);
2370         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2371         ir_node            *result    = create_op(dbgi, expression, left, right);
2372
2373         result = create_conv(dbgi, result, left_mode);
2374         result = do_strict_conv(dbgi, result);
2375
2376         set_value_for_expression_addr(left_expr, result, left_addr);
2377
2378         return result;
2379 }
2380
2381 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2382 {
2383         expression_kind_t kind = expression->base.kind;
2384
2385         switch(kind) {
2386         case EXPR_BINARY_EQUAL:
2387         case EXPR_BINARY_NOTEQUAL:
2388         case EXPR_BINARY_LESS:
2389         case EXPR_BINARY_LESSEQUAL:
2390         case EXPR_BINARY_GREATER:
2391         case EXPR_BINARY_GREATEREQUAL:
2392         case EXPR_BINARY_ISGREATER:
2393         case EXPR_BINARY_ISGREATEREQUAL:
2394         case EXPR_BINARY_ISLESS:
2395         case EXPR_BINARY_ISLESSEQUAL:
2396         case EXPR_BINARY_ISLESSGREATER:
2397         case EXPR_BINARY_ISUNORDERED: {
2398                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2399                 ir_node *left  = expression_to_firm(expression->left);
2400                 ir_node *right = expression_to_firm(expression->right);
2401                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2402                 long     pnc   = get_pnc(kind, expression->left->base.type);
2403                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2404                 return proj;
2405         }
2406         case EXPR_BINARY_ASSIGN: {
2407                 ir_node *addr  = expression_to_addr(expression->left);
2408                 ir_node *right = expression_to_firm(expression->right);
2409                 set_value_for_expression_addr(expression->left, right, addr);
2410
2411                 return right;
2412         }
2413         case EXPR_BINARY_ADD:
2414         case EXPR_BINARY_SUB:
2415         case EXPR_BINARY_MUL:
2416         case EXPR_BINARY_DIV:
2417         case EXPR_BINARY_MOD:
2418         case EXPR_BINARY_BITWISE_AND:
2419         case EXPR_BINARY_BITWISE_OR:
2420         case EXPR_BINARY_BITWISE_XOR:
2421         case EXPR_BINARY_SHIFTLEFT:
2422         case EXPR_BINARY_SHIFTRIGHT:
2423         {
2424                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2425                 ir_node  *left  = expression_to_firm(expression->left);
2426                 ir_node  *right = expression_to_firm(expression->right);
2427                 return create_op(dbgi, expression, left, right);
2428         }
2429         case EXPR_BINARY_LOGICAL_AND:
2430         case EXPR_BINARY_LOGICAL_OR:
2431                 return create_lazy_op(expression);
2432         case EXPR_BINARY_COMMA:
2433                 /* create side effects of left side */
2434                 (void) expression_to_firm(expression->left);
2435                 return _expression_to_firm(expression->right);
2436
2437         case EXPR_BINARY_ADD_ASSIGN:
2438         case EXPR_BINARY_SUB_ASSIGN:
2439         case EXPR_BINARY_MUL_ASSIGN:
2440         case EXPR_BINARY_MOD_ASSIGN:
2441         case EXPR_BINARY_DIV_ASSIGN:
2442         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2443         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2444         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2445         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2446         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2447                 return create_assign_binop(expression);
2448         case EXPR_BINARY_BUILTIN_EXPECT:
2449                 return _expression_to_firm(expression->left);
2450         default:
2451                 panic("TODO binexpr type");
2452         }
2453 }
2454
2455 static ir_node *array_access_addr(const array_access_expression_t *expression)
2456 {
2457         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2458         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2459         ir_node  *offset    = expression_to_firm(expression->index);
2460
2461         type_t  *offset_type = skip_typeref(expression->index->base.type);
2462         ir_mode *mode;
2463         if (is_type_signed(offset_type)) {
2464                 mode = get_ir_mode(type_ssize_t);
2465         } else {
2466                 mode = get_ir_mode(type_size_t);
2467         }
2468         offset = create_conv(dbgi, offset, mode);
2469
2470         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2471         assert(is_type_pointer(ref_type));
2472         pointer_type_t *pointer_type = &ref_type->pointer;
2473
2474         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2475         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2476         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2477                                              mode);
2478         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2479
2480         return result;
2481 }
2482
2483 static ir_node *array_access_to_firm(
2484                 const array_access_expression_t *expression)
2485 {
2486         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2487         ir_node  *addr   = array_access_addr(expression);
2488         type_t   *type   = revert_automatic_type_conversion(
2489                         (const expression_t*) expression);
2490         type             = skip_typeref(type);
2491
2492         return deref_address(dbgi, type, addr);
2493 }
2494
2495 static long get_offsetof_offset(const offsetof_expression_t *expression)
2496 {
2497         type_t *orig_type = expression->type;
2498         long    offset    = 0;
2499
2500         designator_t *designator = expression->designator;
2501         for ( ; designator != NULL; designator = designator->next) {
2502                 type_t *type = skip_typeref(orig_type);
2503                 /* be sure the type is constructed */
2504                 (void) get_ir_type(type);
2505
2506                 if (designator->symbol != NULL) {
2507                         assert(is_type_compound(type));
2508                         symbol_t *symbol = designator->symbol;
2509
2510                         compound_t *compound = type->compound.compound;
2511                         entity_t   *iter     = compound->members.entities;
2512                         for ( ; iter != NULL; iter = iter->base.next) {
2513                                 if (iter->base.symbol == symbol) {
2514                                         break;
2515                                 }
2516                         }
2517                         assert(iter != NULL);
2518
2519                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2520                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2521                         offset += get_entity_offset(iter->compound_member.entity);
2522
2523                         orig_type = iter->declaration.type;
2524                 } else {
2525                         expression_t *array_index = designator->array_index;
2526                         assert(designator->array_index != NULL);
2527                         assert(is_type_array(type));
2528
2529                         long index         = fold_constant(array_index);
2530                         ir_type *arr_type  = get_ir_type(type);
2531                         ir_type *elem_type = get_array_element_type(arr_type);
2532                         long     elem_size = get_type_size_bytes(elem_type);
2533
2534                         offset += index * elem_size;
2535
2536                         orig_type = type->array.element_type;
2537                 }
2538         }
2539
2540         return offset;
2541 }
2542
2543 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2544 {
2545         ir_mode  *mode   = get_ir_mode(expression->base.type);
2546         long      offset = get_offsetof_offset(expression);
2547         tarval   *tv     = new_tarval_from_long(offset, mode);
2548         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2549
2550         return new_d_Const(dbgi, mode, tv);
2551 }
2552
2553 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2554                                      ir_entity *entity, type_t *type);
2555
2556 static ir_node *compound_literal_to_firm(
2557                 const compound_literal_expression_t *expression)
2558 {
2559         type_t *type = expression->type;
2560
2561         /* create an entity on the stack */
2562         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2563
2564         ident     *const id     = id_unique("CompLit.%u");
2565         ir_type   *const irtype = get_ir_type(type);
2566         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2567         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2568         set_entity_ld_ident(entity, id);
2569
2570         set_entity_variability(entity, variability_uninitialized);
2571
2572         /* create initialisation code */
2573         initializer_t *initializer = expression->initializer;
2574         create_local_initializer(initializer, dbgi, entity, type);
2575
2576         /* create a sel for the compound literal address */
2577         ir_node *frame = get_local_frame(entity);
2578         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2579         return sel;
2580 }
2581
2582 /**
2583  * Transform a sizeof expression into Firm code.
2584  */
2585 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2586 {
2587         type_t *type = expression->type;
2588         if (type == NULL) {
2589                 type = expression->tp_expression->base.type;
2590                 assert(type != NULL);
2591         }
2592
2593         type = skip_typeref(type);
2594         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2595         if (is_type_array(type) && type->array.is_vla
2596                         && expression->tp_expression != NULL) {
2597                 expression_to_firm(expression->tp_expression);
2598         }
2599
2600         return get_type_size(type);
2601 }
2602
2603 /**
2604  * Transform an alignof expression into Firm code.
2605  */
2606 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2607 {
2608         type_t *type = expression->type;
2609         if (type == NULL) {
2610                 /* beware: if expression is a variable reference, return the
2611                    alignment of the variable. */
2612                 const expression_t *tp_expression = expression->tp_expression;
2613                 const entity_t     *entity        = expression_is_variable(tp_expression);
2614                 if (entity != NULL) {
2615                         /* TODO: get the alignment of this variable. */
2616                         (void) entity;
2617                 }
2618                 type = tp_expression->base.type;
2619                 assert(type != NULL);
2620         }
2621
2622         ir_mode *const mode = get_ir_mode(expression->base.type);
2623         symconst_symbol sym;
2624         sym.type_p = get_ir_type(type);
2625         return new_SymConst(mode, sym, symconst_type_align);
2626 }
2627
2628 static void init_ir_types(void);
2629
2630 long fold_constant(const expression_t *expression)
2631 {
2632         assert(is_type_valid(skip_typeref(expression->base.type)));
2633
2634         bool constant_folding_old = constant_folding;
2635         constant_folding = true;
2636
2637         init_ir_types();
2638
2639         assert(is_constant_expression(expression));
2640
2641         ir_graph *old_current_ir_graph = current_ir_graph;
2642         if (current_ir_graph == NULL) {
2643                 current_ir_graph = get_const_code_irg();
2644         }
2645
2646         ir_node *cnst = expression_to_firm(expression);
2647         current_ir_graph = old_current_ir_graph;
2648
2649         if (!is_Const(cnst)) {
2650                 panic("couldn't fold constant\n");
2651         }
2652
2653         tarval *tv = get_Const_tarval(cnst);
2654         if (!tarval_is_long(tv)) {
2655                 panic("result of constant folding is not integer\n");
2656         }
2657
2658         constant_folding = constant_folding_old;
2659
2660         return get_tarval_long(tv);
2661 }
2662
2663 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2664 {
2665         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2666
2667         /* first try to fold a constant condition */
2668         if (is_constant_expression(expression->condition)) {
2669                 long val = fold_constant(expression->condition);
2670                 if (val) {
2671                         expression_t *true_expression = expression->true_expression;
2672                         if (true_expression == NULL)
2673                                 true_expression = expression->condition;
2674                         return expression_to_firm(true_expression);
2675                 } else {
2676                         return expression_to_firm(expression->false_expression);
2677                 }
2678         }
2679
2680         ir_node *cur_block   = get_cur_block();
2681
2682         /* create the true block */
2683         ir_node *true_block  = new_immBlock();
2684
2685         ir_node *true_val = expression->true_expression != NULL ?
2686                 expression_to_firm(expression->true_expression) : NULL;
2687         ir_node *true_jmp = new_Jmp();
2688
2689         /* create the false block */
2690         ir_node *false_block = new_immBlock();
2691
2692         ir_node *false_val = expression_to_firm(expression->false_expression);
2693         ir_node *false_jmp = new_Jmp();
2694
2695         /* create the condition evaluation */
2696         set_cur_block(cur_block);
2697         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2698         if (expression->true_expression == NULL) {
2699                 if (cond_expr != NULL) {
2700                         true_val = cond_expr;
2701                 } else {
2702                         /* Condition ended with a short circuit (&&, ||, !) operation.
2703                          * Generate a "1" as value for the true branch. */
2704                         ir_mode *const mode = mode_Is;
2705                         true_val = new_Const(mode, get_mode_one(mode));
2706                 }
2707         }
2708         mature_immBlock(true_block);
2709         mature_immBlock(false_block);
2710
2711         /* create the common block */
2712         ir_node *in_cf[2] = { true_jmp, false_jmp };
2713         new_Block(2, in_cf);
2714
2715         /* TODO improve static semantics, so either both or no values are NULL */
2716         if (true_val == NULL || false_val == NULL)
2717                 return NULL;
2718
2719         ir_node *in[2] = { true_val, false_val };
2720         ir_mode *mode  = get_irn_mode(true_val);
2721         assert(get_irn_mode(false_val) == mode);
2722         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2723
2724         return val;
2725 }
2726
2727 /**
2728  * Returns an IR-node representing the address of a field.
2729  */
2730 static ir_node *select_addr(const select_expression_t *expression)
2731 {
2732         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2733
2734         construct_select_compound(expression);
2735
2736         ir_node *compound_addr = expression_to_firm(expression->compound);
2737
2738         entity_t *entry = expression->compound_entry;
2739         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2740         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2741         ir_entity *irentity = entry->compound_member.entity;
2742
2743         assert(irentity != NULL);
2744
2745         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2746
2747         return sel;
2748 }
2749
2750 static ir_node *select_to_firm(const select_expression_t *expression)
2751 {
2752         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2753         ir_node  *addr = select_addr(expression);
2754         type_t   *type = revert_automatic_type_conversion(
2755                         (const expression_t*) expression);
2756         type           = skip_typeref(type);
2757
2758         entity_t *entry      = expression->compound_entry;
2759         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2760         type_t   *entry_type = skip_typeref(entry->declaration.type);
2761
2762         if (entry_type->kind == TYPE_BITFIELD) {
2763                 return bitfield_extract_to_firm(expression, addr);
2764         }
2765
2766         return deref_address(dbgi, type, addr);
2767 }
2768
2769 /* Values returned by __builtin_classify_type. */
2770 typedef enum gcc_type_class
2771 {
2772         no_type_class = -1,
2773         void_type_class,
2774         integer_type_class,
2775         char_type_class,
2776         enumeral_type_class,
2777         boolean_type_class,
2778         pointer_type_class,
2779         reference_type_class,
2780         offset_type_class,
2781         real_type_class,
2782         complex_type_class,
2783         function_type_class,
2784         method_type_class,
2785         record_type_class,
2786         union_type_class,
2787         array_type_class,
2788         string_type_class,
2789         set_type_class,
2790         file_type_class,
2791         lang_type_class
2792 } gcc_type_class;
2793
2794 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2795 {
2796         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2797
2798         gcc_type_class tc;
2799         switch (type->kind)
2800         {
2801                 case TYPE_ATOMIC: {
2802                         const atomic_type_t *const atomic_type = &type->atomic;
2803                         switch (atomic_type->akind) {
2804                                 /* should not be reached */
2805                                 case ATOMIC_TYPE_INVALID:
2806                                         tc = no_type_class;
2807                                         goto make_const;
2808
2809                                 /* gcc cannot do that */
2810                                 case ATOMIC_TYPE_VOID:
2811                                         tc = void_type_class;
2812                                         goto make_const;
2813
2814                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2815                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2816                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2817                                 case ATOMIC_TYPE_SHORT:
2818                                 case ATOMIC_TYPE_USHORT:
2819                                 case ATOMIC_TYPE_INT:
2820                                 case ATOMIC_TYPE_UINT:
2821                                 case ATOMIC_TYPE_LONG:
2822                                 case ATOMIC_TYPE_ULONG:
2823                                 case ATOMIC_TYPE_LONGLONG:
2824                                 case ATOMIC_TYPE_ULONGLONG:
2825                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2826                                         tc = integer_type_class;
2827                                         goto make_const;
2828
2829                                 case ATOMIC_TYPE_FLOAT:
2830                                 case ATOMIC_TYPE_DOUBLE:
2831                                 case ATOMIC_TYPE_LONG_DOUBLE:
2832                                         tc = real_type_class;
2833                                         goto make_const;
2834                         }
2835                         panic("Unexpected atomic type in classify_type_to_firm().");
2836                 }
2837
2838                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2839                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2840                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2841                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2842                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2843                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2844                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2845                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2846
2847                 /* gcc handles this as integer */
2848                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2849
2850                 case TYPE_BUILTIN:
2851                 /* typedef/typeof should be skipped already */
2852                 case TYPE_TYPEDEF:
2853                 case TYPE_TYPEOF:
2854                 case TYPE_INVALID:
2855                 case TYPE_ERROR:
2856                         break;
2857         }
2858         panic("unexpected TYPE classify_type_to_firm().");
2859
2860 make_const: ;
2861         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2862         ir_mode  *const mode = mode_int;
2863         tarval   *const tv   = new_tarval_from_long(tc, mode);
2864         return new_d_Const(dbgi, mode, tv);
2865 }
2866
2867 static ir_node *function_name_to_firm(
2868                 const funcname_expression_t *const expr)
2869 {
2870         switch(expr->kind) {
2871         case FUNCNAME_FUNCTION:
2872         case FUNCNAME_PRETTY_FUNCTION:
2873         case FUNCNAME_FUNCDNAME:
2874                 if (current_function_name == NULL) {
2875                         const source_position_t *const src_pos = &expr->base.source_position;
2876                         const char    *name  = current_function_entity->base.symbol->string;
2877                         const string_t string = { name, strlen(name) + 1 };
2878                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2879                 }
2880                 return current_function_name;
2881         case FUNCNAME_FUNCSIG:
2882                 if (current_funcsig == NULL) {
2883                         const source_position_t *const src_pos = &expr->base.source_position;
2884                         ir_entity *ent = get_irg_entity(current_ir_graph);
2885                         const char *const name = get_entity_ld_name(ent);
2886                         const string_t string = { name, strlen(name) + 1 };
2887                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2888                 }
2889                 return current_funcsig;
2890         }
2891         panic("Unsupported function name");
2892 }
2893
2894 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2895 {
2896         statement_t *statement = expr->statement;
2897
2898         assert(statement->kind == STATEMENT_COMPOUND);
2899         return compound_statement_to_firm(&statement->compound);
2900 }
2901
2902 static ir_node *va_start_expression_to_firm(
2903         const va_start_expression_t *const expr)
2904 {
2905         type_t    *const type        = current_function_entity->declaration.type;
2906         ir_type   *const method_type = get_ir_type(type);
2907         int        const n           = get_method_n_params(method_type) - 1;
2908         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2909         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2910         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2911         ir_node   *const no_mem      = new_NoMem();
2912         ir_node   *const arg_sel     =
2913                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2914
2915         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2916         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2917         set_value_for_expression(expr->ap, add);
2918
2919         return NULL;
2920 }
2921
2922 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2923 {
2924         type_t       *const type    = expr->base.type;
2925         expression_t *const ap_expr = expr->ap;
2926         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2927         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2928         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2929         ir_node      *const res     = deref_address(dbgi, type, ap);
2930
2931         ir_node      *const cnst    = get_type_size(expr->base.type);
2932         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2933
2934         set_value_for_expression_addr(ap_expr, add, ap_addr);
2935
2936         return res;
2937 }
2938
2939 static ir_node *dereference_addr(const unary_expression_t *const expression)
2940 {
2941         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2942         return expression_to_firm(expression->value);
2943 }
2944
2945 /**
2946  * Returns a IR-node representing an lvalue of the given expression.
2947  */
2948 static ir_node *expression_to_addr(const expression_t *expression)
2949 {
2950         switch(expression->kind) {
2951         case EXPR_REFERENCE:
2952                 return reference_addr(&expression->reference);
2953         case EXPR_ARRAY_ACCESS:
2954                 return array_access_addr(&expression->array_access);
2955         case EXPR_SELECT:
2956                 return select_addr(&expression->select);
2957         case EXPR_CALL:
2958                 return call_expression_to_firm(&expression->call);
2959         case EXPR_UNARY_DEREFERENCE: {
2960                 return dereference_addr(&expression->unary);
2961         }
2962         default:
2963                 break;
2964         }
2965         panic("trying to get address of non-lvalue");
2966 }
2967
2968 static ir_node *builtin_constant_to_firm(
2969                 const builtin_constant_expression_t *expression)
2970 {
2971         ir_mode *mode = get_ir_mode(expression->base.type);
2972         long     v;
2973
2974         if (is_constant_expression(expression->value)) {
2975                 v = 1;
2976         } else {
2977                 v = 0;
2978         }
2979         return new_Const_long(mode, v);
2980 }
2981
2982 static ir_node *builtin_prefetch_to_firm(
2983                 const builtin_prefetch_expression_t *expression)
2984 {
2985         ir_node *adr = expression_to_firm(expression->adr);
2986         /* no Firm support for prefetch yet */
2987         (void) adr;
2988         return NULL;
2989 }
2990
2991 static ir_node *get_label_block(label_t *label)
2992 {
2993         if (label->block != NULL)
2994                 return label->block;
2995
2996         /* beware: might be called from create initializer with current_ir_graph
2997          * set to const_code_irg. */
2998         ir_graph *rem    = current_ir_graph;
2999         current_ir_graph = current_function;
3000
3001         ir_node *old_cur_block = get_cur_block();
3002         ir_node *block         = new_immBlock();
3003         set_cur_block(old_cur_block);
3004
3005         label->block = block;
3006
3007         ARR_APP1(label_t *, all_labels, label);
3008
3009         current_ir_graph = rem;
3010         return block;
3011 }
3012
3013 /**
3014  * Pointer to a label.  This is used for the
3015  * GNU address-of-label extension.
3016  */
3017 static ir_node *label_address_to_firm(
3018                 const label_address_expression_t *label)
3019 {
3020         ir_node    *block = get_label_block(label->label);
3021         ir_label_t  nr    = get_Block_label(block);
3022
3023         if (nr == 0) {
3024                 nr = get_irp_next_label_nr();
3025                 set_Block_label(block, nr);
3026         }
3027         symconst_symbol value;
3028         value.label = nr;
3029         return new_SymConst(mode_P_code, value, symconst_label);
3030 }
3031
3032 /**
3033  * creates firm nodes for an expression. The difference between this function
3034  * and expression_to_firm is, that this version might produce mode_b nodes
3035  * instead of mode_Is.
3036  */
3037 static ir_node *_expression_to_firm(const expression_t *expression)
3038 {
3039 #ifndef NDEBUG
3040         if (!constant_folding) {
3041                 assert(!expression->base.transformed);
3042                 ((expression_t*) expression)->base.transformed = true;
3043         }
3044 #endif
3045
3046         switch (expression->kind) {
3047         case EXPR_CHARACTER_CONSTANT:
3048                 return character_constant_to_firm(&expression->conste);
3049         case EXPR_WIDE_CHARACTER_CONSTANT:
3050                 return wide_character_constant_to_firm(&expression->conste);
3051         case EXPR_CONST:
3052                 return const_to_firm(&expression->conste);
3053         case EXPR_STRING_LITERAL:
3054                 return string_literal_to_firm(&expression->string);
3055         case EXPR_WIDE_STRING_LITERAL:
3056                 return wide_string_literal_to_firm(&expression->wide_string);
3057         case EXPR_REFERENCE:
3058                 return reference_expression_to_firm(&expression->reference);
3059         case EXPR_REFERENCE_ENUM_VALUE:
3060                 return reference_expression_enum_value_to_firm(&expression->reference);
3061         case EXPR_CALL:
3062                 return call_expression_to_firm(&expression->call);
3063         EXPR_UNARY_CASES
3064                 return unary_expression_to_firm(&expression->unary);
3065         EXPR_BINARY_CASES
3066                 return binary_expression_to_firm(&expression->binary);
3067         case EXPR_ARRAY_ACCESS:
3068                 return array_access_to_firm(&expression->array_access);
3069         case EXPR_SIZEOF:
3070                 return sizeof_to_firm(&expression->typeprop);
3071         case EXPR_ALIGNOF:
3072                 return alignof_to_firm(&expression->typeprop);
3073         case EXPR_CONDITIONAL:
3074                 return conditional_to_firm(&expression->conditional);
3075         case EXPR_SELECT:
3076                 return select_to_firm(&expression->select);
3077         case EXPR_CLASSIFY_TYPE:
3078                 return classify_type_to_firm(&expression->classify_type);
3079         case EXPR_FUNCNAME:
3080                 return function_name_to_firm(&expression->funcname);
3081         case EXPR_STATEMENT:
3082                 return statement_expression_to_firm(&expression->statement);
3083         case EXPR_VA_START:
3084                 return va_start_expression_to_firm(&expression->va_starte);
3085         case EXPR_VA_ARG:
3086                 return va_arg_expression_to_firm(&expression->va_arge);
3087         case EXPR_BUILTIN_SYMBOL:
3088                 panic("unimplemented expression found");
3089         case EXPR_BUILTIN_CONSTANT_P:
3090                 return builtin_constant_to_firm(&expression->builtin_constant);
3091         case EXPR_BUILTIN_PREFETCH:
3092                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3093         case EXPR_OFFSETOF:
3094                 return offsetof_to_firm(&expression->offsetofe);
3095         case EXPR_COMPOUND_LITERAL:
3096                 return compound_literal_to_firm(&expression->compound_literal);
3097         case EXPR_LABEL_ADDRESS:
3098                 return label_address_to_firm(&expression->label_address);
3099
3100         case EXPR_UNKNOWN:
3101         case EXPR_INVALID:
3102                 break;
3103         }
3104         panic("invalid expression found");
3105 }
3106
3107 static bool produces_mode_b(const expression_t *expression)
3108 {
3109         switch (expression->kind) {
3110         case EXPR_BINARY_EQUAL:
3111         case EXPR_BINARY_NOTEQUAL:
3112         case EXPR_BINARY_LESS:
3113         case EXPR_BINARY_LESSEQUAL:
3114         case EXPR_BINARY_GREATER:
3115         case EXPR_BINARY_GREATEREQUAL:
3116         case EXPR_BINARY_ISGREATER:
3117         case EXPR_BINARY_ISGREATEREQUAL:
3118         case EXPR_BINARY_ISLESS:
3119         case EXPR_BINARY_ISLESSEQUAL:
3120         case EXPR_BINARY_ISLESSGREATER:
3121         case EXPR_BINARY_ISUNORDERED:
3122         case EXPR_UNARY_NOT:
3123                 return true;
3124
3125         case EXPR_BINARY_BUILTIN_EXPECT:
3126                 return produces_mode_b(expression->binary.left);
3127         case EXPR_BINARY_COMMA:
3128                 return produces_mode_b(expression->binary.right);
3129
3130         default:
3131                 return false;
3132         }
3133 }
3134
3135 static ir_node *expression_to_firm(const expression_t *expression)
3136 {
3137         if (!produces_mode_b(expression)) {
3138                 ir_node *res = _expression_to_firm(expression);
3139                 assert(res == NULL || get_irn_mode(res) != mode_b);
3140                 return res;
3141         }
3142
3143         if (is_constant_expression(expression)) {
3144                 ir_node *res  = _expression_to_firm(expression);
3145                 ir_mode *mode = get_ir_mode(expression->base.type);
3146                 assert(is_Const(res));
3147                 if (is_Const_null(res)) {
3148                         return new_Const_long(mode, 0);
3149                 } else {
3150                         return new_Const_long(mode, 1);
3151                 }
3152         }
3153
3154         /* we have to produce a 0/1 from the mode_b expression */
3155         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3156         return produce_condition_result(expression, dbgi);
3157 }
3158
3159 /**
3160  * create a short-circuit expression evaluation that tries to construct
3161  * efficient control flow structures for &&, || and ! expressions
3162  */
3163 static ir_node *create_condition_evaluation(const expression_t *expression,
3164                                             ir_node *true_block,
3165                                             ir_node *false_block)
3166 {
3167         switch(expression->kind) {
3168         case EXPR_UNARY_NOT: {
3169                 const unary_expression_t *unary_expression = &expression->unary;
3170                 create_condition_evaluation(unary_expression->value, false_block,
3171                                             true_block);
3172                 return NULL;
3173         }
3174         case EXPR_BINARY_LOGICAL_AND: {
3175                 const binary_expression_t *binary_expression = &expression->binary;
3176
3177                 ir_node *cur_block   = get_cur_block();
3178                 ir_node *extra_block = new_immBlock();
3179                 set_cur_block(cur_block);
3180                 create_condition_evaluation(binary_expression->left, extra_block,
3181                                             false_block);
3182                 mature_immBlock(extra_block);
3183                 set_cur_block(extra_block);
3184                 create_condition_evaluation(binary_expression->right, true_block,
3185                                             false_block);
3186                 return NULL;
3187         }
3188         case EXPR_BINARY_LOGICAL_OR: {
3189                 const binary_expression_t *binary_expression = &expression->binary;
3190
3191                 ir_node *cur_block   = get_cur_block();
3192                 ir_node *extra_block = new_immBlock();
3193                 set_cur_block(cur_block);
3194                 create_condition_evaluation(binary_expression->left, true_block,
3195                                             extra_block);
3196                 mature_immBlock(extra_block);
3197                 set_cur_block(extra_block);
3198                 create_condition_evaluation(binary_expression->right, true_block,
3199                                             false_block);
3200                 return NULL;
3201         }
3202         default:
3203                 break;
3204         }
3205
3206         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3207         ir_node  *cond_expr  = _expression_to_firm(expression);
3208         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3209         ir_node  *cond       = new_d_Cond(dbgi, condition);
3210         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3211         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3212
3213         /* set branch prediction info based on __builtin_expect */
3214         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3215                 long               cnst = fold_constant(expression->binary.right);
3216                 cond_jmp_predicate pred;
3217
3218                 if (cnst == 0) {
3219                         pred = COND_JMP_PRED_FALSE;
3220                 } else {
3221                         pred = COND_JMP_PRED_TRUE;
3222                 }
3223                 set_Cond_jmp_pred(cond, pred);
3224         }
3225
3226         add_immBlock_pred(true_block, true_proj);
3227         if (false_block != NULL) {
3228                 add_immBlock_pred(false_block, false_proj);
3229         }
3230
3231         set_cur_block(NULL);
3232         return cond_expr;
3233 }
3234
3235
3236 static void create_variable_entity(entity_t *variable,
3237                                    declaration_kind_t declaration_kind,
3238                                    ir_type *parent_type)
3239 {
3240         assert(variable->kind == ENTITY_VARIABLE);
3241         type_t    *const type     = skip_typeref(variable->declaration.type);
3242         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3243         ir_type   *const irtype   = get_ir_type(type);
3244         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3245         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3246
3247         handle_gnu_attributes_ent(irentity, variable);
3248
3249         variable->declaration.kind  = (unsigned char) declaration_kind;
3250         variable->variable.v.entity = irentity;
3251         set_entity_variability(irentity, variability_uninitialized);
3252         set_entity_ld_ident(irentity, create_ld_ident(variable));
3253         if (parent_type == get_tls_type())
3254                 set_entity_allocation(irentity, allocation_automatic);
3255         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3256                 set_entity_allocation(irentity, allocation_static);
3257
3258         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3259                 set_entity_volatility(irentity, volatility_is_volatile);
3260         }
3261 }
3262
3263
3264 typedef struct type_path_entry_t type_path_entry_t;
3265 struct type_path_entry_t {
3266         type_t           *type;
3267         ir_initializer_t *initializer;
3268         size_t            index;
3269         entity_t         *compound_entry;
3270 };
3271
3272 typedef struct type_path_t type_path_t;
3273 struct type_path_t {
3274         type_path_entry_t *path;
3275         type_t            *top_type;
3276         bool               invalid;
3277 };
3278
3279 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3280 {
3281         size_t len = ARR_LEN(path->path);
3282
3283         for (size_t i = 0; i < len; ++i) {
3284                 const type_path_entry_t *entry = & path->path[i];
3285
3286                 type_t *type = skip_typeref(entry->type);
3287                 if (is_type_compound(type)) {
3288                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3289                 } else if (is_type_array(type)) {
3290                         fprintf(stderr, "[%zu]", entry->index);
3291                 } else {
3292                         fprintf(stderr, "-INVALID-");
3293                 }
3294         }
3295         fprintf(stderr, "  (");
3296         print_type(path->top_type);
3297         fprintf(stderr, ")");
3298 }
3299
3300 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3301 {
3302         size_t len = ARR_LEN(path->path);
3303         assert(len > 0);
3304         return & path->path[len-1];
3305 }
3306
3307 static type_path_entry_t *append_to_type_path(type_path_t *path)
3308 {
3309         size_t len = ARR_LEN(path->path);
3310         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3311
3312         type_path_entry_t *result = & path->path[len];
3313         memset(result, 0, sizeof(result[0]));
3314         return result;
3315 }
3316
3317 static size_t get_compound_member_count(const compound_type_t *type)
3318 {
3319         compound_t *compound  = type->compound;
3320         size_t      n_members = 0;
3321         entity_t   *member    = compound->members.entities;
3322         for ( ; member != NULL; member = member->base.next) {
3323                 ++n_members;
3324         }
3325
3326         return n_members;
3327 }
3328
3329 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3330 {
3331         type_t *orig_top_type = path->top_type;
3332         type_t *top_type      = skip_typeref(orig_top_type);
3333
3334         assert(is_type_compound(top_type) || is_type_array(top_type));
3335
3336         if (ARR_LEN(path->path) == 0) {
3337                 return NULL;
3338         } else {
3339                 type_path_entry_t *top         = get_type_path_top(path);
3340                 ir_initializer_t  *initializer = top->initializer;
3341                 return get_initializer_compound_value(initializer, top->index);
3342         }
3343 }
3344
3345 static void descend_into_subtype(type_path_t *path)
3346 {
3347         type_t *orig_top_type = path->top_type;
3348         type_t *top_type      = skip_typeref(orig_top_type);
3349
3350         assert(is_type_compound(top_type) || is_type_array(top_type));
3351
3352         ir_initializer_t *initializer = get_initializer_entry(path);
3353
3354         type_path_entry_t *top = append_to_type_path(path);
3355         top->type              = top_type;
3356
3357         size_t len;
3358
3359         if (is_type_compound(top_type)) {
3360                 compound_t *compound = top_type->compound.compound;
3361                 entity_t   *entry    = compound->members.entities;
3362
3363                 top->compound_entry = entry;
3364                 top->index          = 0;
3365                 len                 = get_compound_member_count(&top_type->compound);
3366                 if (entry != NULL) {
3367                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3368                         path->top_type = entry->declaration.type;
3369                 }
3370         } else {
3371                 assert(is_type_array(top_type));
3372                 assert(top_type->array.size > 0);
3373
3374                 top->index     = 0;
3375                 path->top_type = top_type->array.element_type;
3376                 len            = top_type->array.size;
3377         }
3378         if (initializer == NULL
3379                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3380                 initializer = create_initializer_compound(len);
3381                 /* we have to set the entry at the 2nd latest path entry... */
3382                 size_t path_len = ARR_LEN(path->path);
3383                 assert(path_len >= 1);
3384                 if (path_len > 1) {
3385                         type_path_entry_t *entry        = & path->path[path_len-2];
3386                         ir_initializer_t  *tinitializer = entry->initializer;
3387                         set_initializer_compound_value(tinitializer, entry->index,
3388                                                        initializer);
3389                 }
3390         }
3391         top->initializer = initializer;
3392 }
3393
3394 static void ascend_from_subtype(type_path_t *path)
3395 {
3396         type_path_entry_t *top = get_type_path_top(path);
3397
3398         path->top_type = top->type;
3399
3400         size_t len = ARR_LEN(path->path);
3401         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3402 }
3403
3404 static void walk_designator(type_path_t *path, const designator_t *designator)
3405 {
3406         /* designators start at current object type */
3407         ARR_RESIZE(type_path_entry_t, path->path, 1);
3408
3409         for ( ; designator != NULL; designator = designator->next) {
3410                 type_path_entry_t *top         = get_type_path_top(path);
3411                 type_t            *orig_type   = top->type;
3412                 type_t            *type        = skip_typeref(orig_type);
3413
3414                 if (designator->symbol != NULL) {
3415                         assert(is_type_compound(type));
3416                         size_t    index  = 0;
3417                         symbol_t *symbol = designator->symbol;
3418
3419                         compound_t *compound = type->compound.compound;
3420                         entity_t   *iter     = compound->members.entities;
3421                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3422                                 if (iter->base.symbol == symbol) {
3423                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3424                                         break;
3425                                 }
3426                         }
3427                         assert(iter != NULL);
3428
3429                         top->type           = orig_type;
3430                         top->compound_entry = iter;
3431                         top->index          = index;
3432                         orig_type           = iter->declaration.type;
3433                 } else {
3434                         expression_t *array_index = designator->array_index;
3435                         assert(designator->array_index != NULL);
3436                         assert(is_type_array(type));
3437
3438                         long index = fold_constant(array_index);
3439                         assert(index >= 0);
3440 #ifndef NDEBUG
3441                         if (type->array.size_constant) {
3442                                 long array_size = type->array.size;
3443                                 assert(index < array_size);
3444                         }
3445 #endif
3446
3447                         top->type  = orig_type;
3448                         top->index = (size_t) index;
3449                         orig_type  = type->array.element_type;
3450                 }
3451                 path->top_type = orig_type;
3452
3453                 if (designator->next != NULL) {
3454                         descend_into_subtype(path);
3455                 }
3456         }
3457
3458         path->invalid  = false;
3459 }
3460
3461 static void advance_current_object(type_path_t *path)
3462 {
3463         if (path->invalid) {
3464                 /* TODO: handle this... */
3465                 panic("invalid initializer in ast2firm (excessive elements)");
3466                 return;
3467         }
3468
3469         type_path_entry_t *top = get_type_path_top(path);
3470
3471         type_t *type = skip_typeref(top->type);
3472         if (is_type_union(type)) {
3473                 top->compound_entry = NULL;
3474         } else if (is_type_struct(type)) {
3475                 entity_t *entry = top->compound_entry;
3476
3477                 top->index++;
3478                 entry               = entry->base.next;
3479                 top->compound_entry = entry;
3480                 if (entry != NULL) {
3481                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3482                         path->top_type = entry->declaration.type;
3483                         return;
3484                 }
3485         } else {
3486                 assert(is_type_array(type));
3487
3488                 top->index++;
3489                 if (!type->array.size_constant || top->index < type->array.size) {
3490                         return;
3491                 }
3492         }
3493
3494         /* we're past the last member of the current sub-aggregate, try if we
3495          * can ascend in the type hierarchy and continue with another subobject */
3496         size_t len = ARR_LEN(path->path);
3497
3498         if (len > 1) {
3499                 ascend_from_subtype(path);
3500                 advance_current_object(path);
3501         } else {
3502                 path->invalid = true;
3503         }
3504 }
3505
3506
3507 static ir_initializer_t *create_ir_initializer(
3508                 const initializer_t *initializer, type_t *type);
3509
3510 static ir_initializer_t *create_ir_initializer_value(
3511                 const initializer_value_t *initializer)
3512 {
3513         if (is_type_compound(initializer->value->base.type)) {
3514                 panic("initializer creation for compounds not implemented yet");
3515         }
3516         ir_node *value = expression_to_firm(initializer->value);
3517         return create_initializer_const(value);
3518 }
3519
3520 /** test wether type can be initialized by a string constant */
3521 static bool is_string_type(type_t *type)
3522 {
3523         type_t *inner;
3524         if (is_type_pointer(type)) {
3525                 inner = skip_typeref(type->pointer.points_to);
3526         } else if(is_type_array(type)) {
3527                 inner = skip_typeref(type->array.element_type);
3528         } else {
3529                 return false;
3530         }
3531
3532         return is_type_integer(inner);
3533 }
3534
3535 static ir_initializer_t *create_ir_initializer_list(
3536                 const initializer_list_t *initializer, type_t *type)
3537 {
3538         type_path_t path;
3539         memset(&path, 0, sizeof(path));
3540         path.top_type = type;
3541         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3542
3543         descend_into_subtype(&path);
3544
3545         for (size_t i = 0; i < initializer->len; ++i) {
3546                 const initializer_t *sub_initializer = initializer->initializers[i];
3547
3548                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3549                         walk_designator(&path, sub_initializer->designator.designator);
3550                         continue;
3551                 }
3552
3553                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3554                         /* we might have to descend into types until we're at a scalar
3555                          * type */
3556                         while(true) {
3557                                 type_t *orig_top_type = path.top_type;
3558                                 type_t *top_type      = skip_typeref(orig_top_type);
3559
3560                                 if (is_type_scalar(top_type))
3561                                         break;
3562                                 descend_into_subtype(&path);
3563                         }
3564                 } else if (sub_initializer->kind == INITIALIZER_STRING
3565                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3566                         /* we might have to descend into types until we're at a scalar
3567                          * type */
3568                         while (true) {
3569                                 type_t *orig_top_type = path.top_type;
3570                                 type_t *top_type      = skip_typeref(orig_top_type);
3571
3572                                 if (is_string_type(top_type))
3573                                         break;
3574                                 descend_into_subtype(&path);
3575                         }
3576                 }
3577
3578                 ir_initializer_t *sub_irinitializer
3579                         = create_ir_initializer(sub_initializer, path.top_type);
3580
3581                 size_t path_len = ARR_LEN(path.path);
3582                 assert(path_len >= 1);
3583                 type_path_entry_t *entry        = & path.path[path_len-1];
3584                 ir_initializer_t  *tinitializer = entry->initializer;
3585                 set_initializer_compound_value(tinitializer, entry->index,
3586                                                sub_irinitializer);
3587
3588                 advance_current_object(&path);
3589         }
3590
3591         assert(ARR_LEN(path.path) >= 1);
3592         ir_initializer_t *result = path.path[0].initializer;
3593         DEL_ARR_F(path.path);
3594
3595         return result;
3596 }
3597
3598 static ir_initializer_t *create_ir_initializer_string(
3599                 const initializer_string_t *initializer, type_t *type)
3600 {
3601         type = skip_typeref(type);
3602
3603         size_t            string_len    = initializer->string.size;
3604         assert(type->kind == TYPE_ARRAY);
3605         assert(type->array.size_constant);
3606         size_t            len           = type->array.size;
3607         ir_initializer_t *irinitializer = create_initializer_compound(len);
3608
3609         const char *string = initializer->string.begin;
3610         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3611
3612         for (size_t i = 0; i < len; ++i) {
3613                 char c = 0;
3614                 if (i < string_len)
3615                         c = string[i];
3616
3617                 tarval           *tv = new_tarval_from_long(c, mode);
3618                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3619
3620                 set_initializer_compound_value(irinitializer, i, char_initializer);
3621         }
3622
3623         return irinitializer;
3624 }
3625
3626 static ir_initializer_t *create_ir_initializer_wide_string(
3627                 const initializer_wide_string_t *initializer, type_t *type)
3628 {
3629         size_t            string_len    = initializer->string.size;
3630         assert(type->kind == TYPE_ARRAY);
3631         assert(type->array.size_constant);
3632         size_t            len           = type->array.size;
3633         ir_initializer_t *irinitializer = create_initializer_compound(len);
3634
3635         const wchar_rep_t *string = initializer->string.begin;
3636         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3637
3638         for (size_t i = 0; i < len; ++i) {
3639                 wchar_rep_t c = 0;
3640                 if (i < string_len) {
3641                         c = string[i];
3642                 }
3643                 tarval *tv = new_tarval_from_long(c, mode);
3644                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3645
3646                 set_initializer_compound_value(irinitializer, i, char_initializer);
3647         }
3648
3649         return irinitializer;
3650 }
3651
3652 static ir_initializer_t *create_ir_initializer(
3653                 const initializer_t *initializer, type_t *type)
3654 {
3655         switch(initializer->kind) {
3656                 case INITIALIZER_STRING:
3657                         return create_ir_initializer_string(&initializer->string, type);
3658
3659                 case INITIALIZER_WIDE_STRING:
3660                         return create_ir_initializer_wide_string(&initializer->wide_string,
3661                                                                  type);
3662
3663                 case INITIALIZER_LIST:
3664                         return create_ir_initializer_list(&initializer->list, type);
3665
3666                 case INITIALIZER_VALUE:
3667                         return create_ir_initializer_value(&initializer->value);
3668
3669                 case INITIALIZER_DESIGNATOR:
3670                         panic("unexpected designator initializer found");
3671         }
3672         panic("unknown initializer");
3673 }
3674
3675 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3676                 ir_node *base_addr)
3677 {
3678         if (is_atomic_type(type)) {
3679                 ir_mode *mode = get_type_mode(type);
3680                 tarval  *zero = get_mode_null(mode);
3681                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3682
3683                 /* TODO: bitfields */
3684                 ir_node *mem    = get_store();
3685                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3686                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3687                 set_store(proj_m);
3688         } else {
3689                 assert(is_compound_type(type));
3690
3691                 int n_members;
3692                 if (is_Array_type(type)) {
3693                         assert(has_array_upper_bound(type, 0));
3694                         n_members = get_array_upper_bound_int(type, 0);
3695                 } else {
3696                         n_members = get_compound_n_members(type);
3697                 }
3698
3699                 for (int i = 0; i < n_members; ++i) {
3700                         ir_node *addr;
3701                         ir_type *irtype;
3702                         if (is_Array_type(type)) {
3703                                 ir_entity *entity   = get_array_element_entity(type);
3704                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3705                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3706                                 ir_node   *in[1]    = { cnst };
3707                                 irtype = get_array_element_type(type);
3708                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3709                         } else {
3710                                 ir_entity *member = get_compound_member(type, i);
3711
3712                                 irtype = get_entity_type(member);
3713                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3714                         }
3715
3716                         create_dynamic_null_initializer(irtype, dbgi, addr);
3717                 }
3718         }
3719 }
3720
3721 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3722                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3723 {
3724         switch(get_initializer_kind(initializer)) {
3725         case IR_INITIALIZER_NULL: {
3726                 create_dynamic_null_initializer(type, dbgi, base_addr);
3727                 return;
3728         }
3729         case IR_INITIALIZER_CONST: {
3730                 ir_node *node     = get_initializer_const_value(initializer);
3731                 ir_mode *mode     = get_irn_mode(node);
3732                 ir_type *ent_type = get_entity_type(entity);
3733
3734                 /* is it a bitfield type? */
3735                 if (is_Primitive_type(ent_type) &&
3736                                 get_primitive_base_type(ent_type) != NULL) {
3737                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3738                         return;
3739                 }
3740
3741                 assert(get_type_mode(type) == mode);
3742                 ir_node *mem    = get_store();
3743                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3744                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3745                 set_store(proj_m);
3746                 return;
3747         }
3748         case IR_INITIALIZER_TARVAL: {
3749                 tarval  *tv       = get_initializer_tarval_value(initializer);
3750                 ir_mode *mode     = get_tarval_mode(tv);
3751                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3752                 ir_type *ent_type = get_entity_type(entity);
3753
3754                 /* is it a bitfield type? */
3755                 if (is_Primitive_type(ent_type) &&
3756                                 get_primitive_base_type(ent_type) != NULL) {
3757                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3758                         return;
3759                 }
3760
3761                 assert(get_type_mode(type) == mode);
3762                 ir_node *mem    = get_store();
3763                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3764                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3765                 set_store(proj_m);
3766                 return;
3767         }
3768         case IR_INITIALIZER_COMPOUND: {
3769                 assert(is_compound_type(type));
3770                 int n_members;
3771                 if (is_Array_type(type)) {
3772                         assert(has_array_upper_bound(type, 0));
3773                         n_members = get_array_upper_bound_int(type, 0);
3774                 } else {
3775                         n_members = get_compound_n_members(type);
3776                 }
3777
3778                 if (get_initializer_compound_n_entries(initializer)
3779                                 != (unsigned) n_members)
3780                         panic("initializer doesn't match compound type");
3781
3782                 for (int i = 0; i < n_members; ++i) {
3783                         ir_node   *addr;
3784                         ir_type   *irtype;
3785                         ir_entity *sub_entity;
3786                         if (is_Array_type(type)) {
3787                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3788                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3789                                 ir_node   *in[1]    = { cnst };
3790                                 irtype     = get_array_element_type(type);
3791                                 sub_entity = get_array_element_entity(type);
3792                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3793                                                        sub_entity);
3794                         } else {
3795                                 sub_entity = get_compound_member(type, i);
3796                                 irtype     = get_entity_type(sub_entity);
3797                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3798                                                              sub_entity);
3799                         }
3800
3801                         ir_initializer_t *sub_init
3802                                 = get_initializer_compound_value(initializer, i);
3803
3804                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3805                                                        addr);
3806                 }
3807                 return;
3808         }
3809         }
3810
3811         panic("invalid IR_INITIALIZER found");
3812 }
3813
3814 static void create_dynamic_initializer(ir_initializer_t *initializer,
3815                 dbg_info *dbgi, ir_entity *entity)
3816 {
3817         ir_node *frame     = get_local_frame(entity);
3818         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3819         ir_type *type      = get_entity_type(entity);
3820
3821         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3822 }
3823
3824 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3825                                      ir_entity *entity, type_t *type)
3826 {
3827         ir_node *memory = get_store();
3828         ir_node *nomem  = new_NoMem();
3829         ir_node *frame  = get_irg_frame(current_ir_graph);
3830         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3831
3832         if (initializer->kind == INITIALIZER_VALUE) {
3833                 initializer_value_t *initializer_value = &initializer->value;
3834
3835                 ir_node *value = expression_to_firm(initializer_value->value);
3836                 type = skip_typeref(type);
3837                 assign_value(dbgi, addr, type, value);
3838                 return;
3839         }
3840
3841         if (!is_constant_initializer(initializer)) {
3842                 ir_initializer_t *irinitializer
3843                         = create_ir_initializer(initializer, type);
3844
3845                 create_dynamic_initializer(irinitializer, dbgi, entity);
3846                 return;
3847         }
3848
3849         /* create the ir_initializer */
3850         ir_graph *const old_current_ir_graph = current_ir_graph;
3851         current_ir_graph = get_const_code_irg();
3852
3853         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3854
3855         assert(current_ir_graph == get_const_code_irg());
3856         current_ir_graph = old_current_ir_graph;
3857
3858         /* create a "template" entity which is copied to the entity on the stack */
3859         ident     *const id          = id_unique("initializer.%u");
3860         ir_type   *const irtype      = get_ir_type(type);
3861         ir_type   *const global_type = get_glob_type();
3862         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3863         set_entity_ld_ident(init_entity, id);
3864
3865         set_entity_variability(init_entity, variability_initialized);
3866         set_entity_visibility(init_entity, visibility_local);
3867         set_entity_allocation(init_entity, allocation_static);
3868
3869         set_entity_initializer(init_entity, irinitializer);
3870
3871         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3872         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3873
3874         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3875         set_store(copyb_mem);
3876 }
3877
3878 static void create_initializer_local_variable_entity(entity_t *entity)
3879 {
3880         assert(entity->kind == ENTITY_VARIABLE);
3881         initializer_t *initializer = entity->variable.initializer;
3882         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3883         ir_entity     *irentity    = entity->variable.v.entity;
3884         type_t        *type        = entity->declaration.type;
3885         create_local_initializer(initializer, dbgi, irentity, type);
3886 }
3887
3888 static void create_variable_initializer(entity_t *entity)
3889 {
3890         assert(entity->kind == ENTITY_VARIABLE);
3891         initializer_t *initializer = entity->variable.initializer;
3892         if (initializer == NULL)
3893                 return;
3894
3895         declaration_kind_t declaration_kind
3896                 = (declaration_kind_t) entity->declaration.kind;
3897         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3898                 create_initializer_local_variable_entity(entity);
3899                 return;
3900         }
3901
3902         type_t            *type = entity->declaration.type;
3903         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3904
3905         if (initializer->kind == INITIALIZER_VALUE) {
3906                 initializer_value_t *initializer_value = &initializer->value;
3907                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3908
3909                 ir_node *value = expression_to_firm(initializer_value->value);
3910                 value = do_strict_conv(dbgi, value);
3911
3912                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3913                         set_value(entity->variable.v.value_number, value);
3914                 } else {
3915                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3916
3917                         ir_entity *irentity = entity->variable.v.entity;
3918
3919                         if (tq & TYPE_QUALIFIER_CONST) {
3920                                 set_entity_variability(irentity, variability_constant);
3921                         } else {
3922                                 set_entity_variability(irentity, variability_initialized);
3923                         }
3924                         set_atomic_ent_value(irentity, value);
3925                 }
3926         } else {
3927                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3928                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3929
3930                 ir_entity        *irentity        = entity->variable.v.entity;
3931                 ir_initializer_t *irinitializer
3932                         = create_ir_initializer(initializer, type);
3933
3934                 if (tq & TYPE_QUALIFIER_CONST) {
3935                         set_entity_variability(irentity, variability_constant);
3936                 } else {
3937                         set_entity_variability(irentity, variability_initialized);
3938                 }
3939                 set_entity_initializer(irentity, irinitializer);
3940         }
3941 }
3942
3943 static void create_variable_length_array(entity_t *entity)
3944 {
3945         assert(entity->kind == ENTITY_VARIABLE);
3946         assert(entity->variable.initializer == NULL);
3947
3948         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3949         entity->variable.v.vla_base = NULL;
3950
3951         /* TODO: record VLA somewhere so we create the free node when we leave
3952          * it's scope */
3953 }
3954
3955 static void allocate_variable_length_array(entity_t *entity)
3956 {
3957         assert(entity->kind == ENTITY_VARIABLE);
3958         assert(entity->variable.initializer == NULL);
3959         assert(get_cur_block() != NULL);
3960
3961         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3962         type_t   *type      = entity->declaration.type;
3963         ir_type  *el_type   = get_ir_type(type->array.element_type);
3964
3965         /* make sure size_node is calculated */
3966         get_type_size(type);
3967         ir_node  *elems = type->array.size_node;
3968         ir_node  *mem   = get_store();
3969         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3970
3971         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3972         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3973         set_store(proj_m);
3974
3975         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3976         entity->variable.v.vla_base = addr;
3977 }
3978
3979 /**
3980  * Creates a Firm local variable from a declaration.
3981  */
3982 static void create_local_variable(entity_t *entity)
3983 {
3984         assert(entity->kind == ENTITY_VARIABLE);
3985         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3986
3987         bool needs_entity = entity->variable.address_taken;
3988         type_t *type = skip_typeref(entity->declaration.type);
3989
3990         /* is it a variable length array? */
3991         if (is_type_array(type) && !type->array.size_constant) {
3992                 create_variable_length_array(entity);
3993                 return;
3994         } else if (is_type_array(type) || is_type_compound(type)) {
3995                 needs_entity = true;
3996         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3997                 needs_entity = true;
3998         }
3999
4000         if (needs_entity) {
4001                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4002                 create_variable_entity(entity,
4003                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4004                                        frame_type);
4005         } else {
4006                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4007                 entity->variable.v.value_number = next_value_number_function;
4008                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4009                                         (variable_t*) &entity->variable);
4010                 ++next_value_number_function;
4011         }
4012 }
4013
4014 static void create_local_static_variable(entity_t *entity)
4015 {
4016         assert(entity->kind == ENTITY_VARIABLE);
4017         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4018
4019         type_t    *const type        = skip_typeref(entity->declaration.type);
4020         ir_type   *const global_type = get_glob_type();
4021         ir_type   *const irtype      = get_ir_type(type);
4022         dbg_info  *const dbgi        = get_dbg_info(&entity->base.source_position);
4023
4024         size_t l = strlen(entity->base.symbol->string);
4025         char   buf[l + sizeof(".%u")];
4026         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4027         ident     *const id = id_unique(buf);
4028
4029         ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4030
4031         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4032                 set_entity_volatility(irentity, volatility_is_volatile);
4033         }
4034
4035         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4036         entity->variable.v.entity = irentity;
4037         set_entity_ld_ident(irentity, id);
4038         set_entity_variability(irentity, variability_uninitialized);
4039         set_entity_visibility(irentity, visibility_local);
4040         set_entity_allocation(irentity, allocation_static);
4041
4042         ir_graph *const old_current_ir_graph = current_ir_graph;
4043         current_ir_graph = get_const_code_irg();
4044
4045         create_variable_initializer(entity);
4046
4047         assert(current_ir_graph == get_const_code_irg());
4048         current_ir_graph = old_current_ir_graph;
4049 }
4050
4051
4052
4053 static void return_statement_to_firm(return_statement_t *statement)
4054 {
4055         if (get_cur_block() == NULL)
4056                 return;
4057
4058         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4059         type_t   *type        = current_function_entity->declaration.type;
4060         ir_type  *func_irtype = get_ir_type(type);
4061
4062
4063         ir_node *in[1];
4064         int      in_len;
4065         if (get_method_n_ress(func_irtype) > 0) {
4066                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4067
4068                 if (statement->value != NULL) {
4069                         ir_node *node = expression_to_firm(statement->value);
4070                         node  = do_strict_conv(dbgi, node);
4071                         in[0] = node;
4072                 } else {
4073                         ir_mode *mode;
4074                         if (is_compound_type(res_type)) {
4075                                 mode = mode_P_data;
4076                         } else {
4077                                 mode = get_type_mode(res_type);
4078                         }
4079                         in[0] = new_Unknown(mode);
4080                 }
4081                 in_len = 1;
4082         } else {
4083                 /* build return_value for its side effects */
4084                 if (statement->value != NULL) {
4085                         expression_to_firm(statement->value);
4086                 }
4087                 in_len = 0;
4088         }
4089
4090         ir_node  *store = get_store();
4091         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4092
4093         ir_node *end_block = get_irg_end_block(current_ir_graph);
4094         add_immBlock_pred(end_block, ret);
4095
4096         set_cur_block(NULL);
4097 }
4098
4099 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4100 {
4101         if (get_cur_block() == NULL)
4102                 return NULL;
4103
4104         return expression_to_firm(statement->expression);
4105 }
4106
4107 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4108 {
4109         entity_t *entity = compound->scope.entities;
4110         for ( ; entity != NULL; entity = entity->base.next) {
4111                 if (!is_declaration(entity))
4112                         continue;
4113
4114                 create_local_declaration(entity);
4115         }
4116
4117         ir_node     *result    = NULL;
4118         statement_t *statement = compound->statements;
4119         for ( ; statement != NULL; statement = statement->base.next) {
4120                 if (statement->base.next == NULL
4121                                 && statement->kind == STATEMENT_EXPRESSION) {
4122                         result = expression_statement_to_firm(
4123                                         &statement->expression);
4124                         break;
4125                 }
4126                 statement_to_firm(statement);
4127         }
4128
4129         return result;
4130 }
4131
4132 static void create_global_variable(entity_t *entity)
4133 {
4134         assert(entity->kind == ENTITY_VARIABLE);
4135
4136         ir_visibility  vis;
4137         ir_type       *var_type;
4138         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4139                 case STORAGE_CLASS_STATIC:
4140                         vis = visibility_local;
4141                         goto global_var;
4142
4143                 case STORAGE_CLASS_EXTERN:
4144                         vis = visibility_external_allocated;
4145                         goto global_var;
4146
4147                 case STORAGE_CLASS_NONE:
4148                         vis = visibility_external_visible;
4149                         goto global_var;
4150
4151                 case STORAGE_CLASS_THREAD:
4152                         vis = visibility_external_visible;
4153                         goto tls_var;
4154
4155                 case STORAGE_CLASS_THREAD_EXTERN:
4156                         vis = visibility_external_allocated;
4157                         goto tls_var;
4158
4159                 case STORAGE_CLASS_THREAD_STATIC:
4160                         vis = visibility_local;
4161                         goto tls_var;
4162
4163 tls_var:
4164                         var_type = get_tls_type();
4165                         goto create_var;
4166
4167 global_var:
4168                         var_type = get_glob_type();
4169                         goto create_var;
4170
4171 create_var:
4172                         create_variable_entity(entity,
4173                                                DECLARATION_KIND_GLOBAL_VARIABLE,
4174                                                var_type);
4175                         /* Matze: I'm confused, shouldn't we only be here when creating
4176                          * variables? */
4177 #if 0
4178                         if (!is_type_function(skip_typeref(entity->declaration.type))) {
4179                                 set_entity_visibility(declaration->v.entity, vis);
4180                         }
4181 #else
4182                         set_entity_visibility(entity->variable.v.entity, vis);
4183 #endif
4184
4185                         return;
4186
4187                 case STORAGE_CLASS_TYPEDEF:
4188                 case STORAGE_CLASS_AUTO:
4189                 case STORAGE_CLASS_REGISTER:
4190                         break;
4191         }
4192         panic("Invalid storage class for global variable");
4193 }
4194
4195 static void create_local_declaration(entity_t *entity)
4196 {
4197         assert(is_declaration(entity));
4198
4199         /* construct type */
4200         (void) get_ir_type(entity->declaration.type);
4201         if (entity->base.symbol == NULL) {
4202                 return;
4203         }
4204
4205         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4206         case STORAGE_CLASS_STATIC:
4207                 create_local_static_variable(entity);
4208                 return;
4209         case STORAGE_CLASS_EXTERN:
4210                 if (entity->kind == ENTITY_FUNCTION) {
4211                         assert(entity->function.statement == NULL);
4212                         get_function_entity(entity);
4213                 } else {
4214                         create_global_variable(entity);
4215                         create_variable_initializer(entity);
4216                 }
4217                 return;
4218         case STORAGE_CLASS_NONE:
4219         case STORAGE_CLASS_AUTO:
4220         case STORAGE_CLASS_REGISTER:
4221                 if (entity->kind == ENTITY_FUNCTION) {
4222                         if (entity->function.statement != NULL) {
4223                                 get_function_entity(entity);
4224                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4225                                 enqueue_inner_function(entity);
4226                         } else {
4227                                 get_function_entity(entity);
4228                         }
4229                 } else {
4230                         create_local_variable(entity);
4231                 }
4232                 return;
4233         case STORAGE_CLASS_TYPEDEF:
4234         case STORAGE_CLASS_THREAD:
4235         case STORAGE_CLASS_THREAD_EXTERN:
4236         case STORAGE_CLASS_THREAD_STATIC:
4237                 break;
4238         }
4239         panic("invalid storage class found");
4240 }
4241
4242 static void initialize_local_declaration(entity_t *entity)
4243 {
4244         if (entity->base.symbol == NULL)
4245                 return;
4246
4247         switch ((declaration_kind_t) entity->declaration.kind) {
4248         case DECLARATION_KIND_LOCAL_VARIABLE:
4249         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4250                 create_variable_initializer(entity);
4251                 return;
4252
4253         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4254                 allocate_variable_length_array(entity);
4255                 return;
4256
4257         case DECLARATION_KIND_COMPOUND_MEMBER:
4258         case DECLARATION_KIND_GLOBAL_VARIABLE:
4259         case DECLARATION_KIND_FUNCTION:
4260         case DECLARATION_KIND_INNER_FUNCTION:
4261                 return;
4262
4263         case DECLARATION_KIND_UNKNOWN:
4264                 panic("can't initialize unknown declaration");
4265         }
4266         panic("invalid declaration kind");
4267 }
4268
4269 static void declaration_statement_to_firm(declaration_statement_t *statement)
4270 {
4271         entity_t *entity = statement->declarations_begin;
4272         entity_t *end    = statement->declarations_end->base.next;
4273         for ( ; entity != end; entity = entity->base.next) {
4274                 if (!is_declaration(entity))
4275                         continue;
4276                 initialize_local_declaration(entity);
4277         }
4278 }
4279
4280 static void if_statement_to_firm(if_statement_t *statement)
4281 {
4282         ir_node *cur_block = get_cur_block();
4283
4284         ir_node *fallthrough_block = NULL;
4285
4286         /* the true (blocks) */
4287         ir_node *true_block = NULL;
4288         if (statement->true_statement != NULL) {
4289                 true_block = new_immBlock();
4290                 statement_to_firm(statement->true_statement);
4291                 if (get_cur_block() != NULL) {
4292                         ir_node *jmp = new_Jmp();
4293                         if (fallthrough_block == NULL)
4294                                 fallthrough_block = new_immBlock();
4295                         add_immBlock_pred(fallthrough_block, jmp);
4296                 }
4297         }
4298
4299         /* the false (blocks) */
4300         ir_node *false_block = NULL;
4301         if (statement->false_statement != NULL) {
4302                 false_block = new_immBlock();
4303
4304                 statement_to_firm(statement->false_statement);
4305                 if (get_cur_block() != NULL) {
4306                         ir_node *jmp = new_Jmp();
4307                         if (fallthrough_block == NULL)
4308                                 fallthrough_block = new_immBlock();
4309                         add_immBlock_pred(fallthrough_block, jmp);
4310                 }
4311         }
4312
4313         /* create the condition */
4314         if (cur_block != NULL) {
4315                 if (true_block == NULL || false_block == NULL) {
4316                         if (fallthrough_block == NULL)
4317                                 fallthrough_block = new_immBlock();
4318                         if (true_block == NULL)
4319                                 true_block = fallthrough_block;
4320                         if (false_block == NULL)
4321                                 false_block = fallthrough_block;
4322                 }
4323
4324                 set_cur_block(cur_block);
4325                 create_condition_evaluation(statement->condition, true_block,
4326                                             false_block);
4327         }
4328
4329         mature_immBlock(true_block);
4330         if (false_block != fallthrough_block && false_block != NULL) {
4331                 mature_immBlock(false_block);
4332         }
4333         if (fallthrough_block != NULL) {
4334                 mature_immBlock(fallthrough_block);
4335         }
4336
4337         set_cur_block(fallthrough_block);
4338 }
4339
4340 static void while_statement_to_firm(while_statement_t *statement)
4341 {
4342         ir_node *jmp = NULL;
4343         if (get_cur_block() != NULL) {
4344                 jmp = new_Jmp();
4345         }
4346
4347         /* create the header block */
4348         ir_node *header_block = new_immBlock();
4349         if (jmp != NULL) {
4350                 add_immBlock_pred(header_block, jmp);
4351         }
4352
4353         /* the loop body */
4354         ir_node *old_continue_label = continue_label;
4355         ir_node *old_break_label    = break_label;
4356         continue_label              = header_block;
4357         break_label                 = NULL;
4358
4359         ir_node *body_block = new_immBlock();
4360         statement_to_firm(statement->body);
4361         ir_node *false_block = break_label;
4362
4363         assert(continue_label == header_block);
4364         continue_label = old_continue_label;
4365         break_label    = old_break_label;
4366
4367         if (get_cur_block() != NULL) {
4368                 jmp = new_Jmp();
4369                 add_immBlock_pred(header_block, jmp);
4370         }
4371
4372         /* shortcut for while(true) */
4373         if (is_constant_expression(statement->condition)
4374                         && fold_constant(statement->condition) != 0) {
4375                 set_cur_block(header_block);
4376                 ir_node *header_jmp = new_Jmp();
4377                 add_immBlock_pred(body_block, header_jmp);
4378
4379                 keep_alive(body_block);
4380                 keep_all_memory(body_block);
4381                 set_cur_block(body_block);
4382         } else {
4383                 if (false_block == NULL) {
4384                         false_block = new_immBlock();
4385                 }
4386
4387                 /* create the condition */
4388                 set_cur_block(header_block);
4389
4390                 create_condition_evaluation(statement->condition, body_block,
4391                                             false_block);
4392         }
4393
4394         mature_immBlock(body_block);
4395         mature_immBlock(header_block);
4396         if (false_block != NULL) {
4397                 mature_immBlock(false_block);
4398         }
4399
4400         set_cur_block(false_block);
4401 }
4402
4403 static void do_while_statement_to_firm(do_while_statement_t *statement)
4404 {
4405         ir_node *jmp = NULL;
4406         if (get_cur_block() != NULL) {
4407                 jmp = new_Jmp();
4408         }
4409
4410         /* create the header block */
4411         ir_node *header_block = new_immBlock();
4412
4413         /* the loop body */
4414         ir_node *body_block = new_immBlock();
4415         if (jmp != NULL) {
4416                 add_immBlock_pred(body_block, jmp);
4417         }
4418
4419         ir_node *old_continue_label = continue_label;
4420         ir_node *old_break_label    = break_label;
4421         continue_label              = header_block;
4422         break_label                 = NULL;
4423
4424         statement_to_firm(statement->body);
4425         ir_node *false_block = break_label;
4426
4427         assert(continue_label == header_block);
4428         continue_label = old_continue_label;
4429         break_label    = old_break_label;
4430
4431         if (get_cur_block() != NULL) {
4432                 ir_node *body_jmp = new_Jmp();
4433                 add_immBlock_pred(header_block, body_jmp);
4434                 mature_immBlock(header_block);
4435         }
4436
4437         if (false_block == NULL) {
4438                 false_block = new_immBlock();
4439         }
4440
4441         /* create the condition */
4442         set_cur_block(header_block);
4443
4444         create_condition_evaluation(statement->condition, body_block, false_block);
4445         mature_immBlock(body_block);
4446         mature_immBlock(header_block);
4447         if (false_block != NULL) {
4448                 mature_immBlock(false_block);
4449         }
4450
4451         set_cur_block(false_block);
4452 }
4453
4454 static void for_statement_to_firm(for_statement_t *statement)
4455 {
4456         ir_node *jmp = NULL;
4457
4458         /* create declarations */
4459         entity_t *entity = statement->scope.entities;
4460         for ( ; entity != NULL; entity = entity->base.next) {
4461                 if (!is_declaration(entity))
4462                         continue;
4463
4464                 create_local_declaration(entity);
4465         }
4466
4467         if (get_cur_block() != NULL) {
4468                 entity = statement->scope.entities;
4469                 for ( ; entity != NULL; entity = entity->base.next) {
4470                         if (!is_declaration(entity))
4471                                 continue;
4472
4473                         initialize_local_declaration(entity);
4474                 }
4475
4476                 if (statement->initialisation != NULL) {
4477                         expression_to_firm(statement->initialisation);
4478                 }
4479
4480                 jmp = new_Jmp();
4481         }
4482
4483
4484         /* create the step block */
4485         ir_node *const step_block = new_immBlock();
4486         if (statement->step != NULL) {
4487                 expression_to_firm(statement->step);
4488         }
4489         ir_node *const step_jmp = new_Jmp();
4490
4491         /* create the header block */
4492         ir_node *const header_block = new_immBlock();
4493         if (jmp != NULL) {
4494                 add_immBlock_pred(header_block, jmp);
4495         }
4496         add_immBlock_pred(header_block, step_jmp);
4497
4498         /* the false block */
4499         ir_node *const false_block = new_immBlock();
4500
4501         /* the loop body */
4502         ir_node * body_block;
4503         if (statement->body != NULL) {
4504                 ir_node *const old_continue_label = continue_label;
4505                 ir_node *const old_break_label    = break_label;
4506                 continue_label = step_block;
4507                 break_label    = false_block;
4508
4509                 body_block = new_immBlock();
4510                 statement_to_firm(statement->body);
4511
4512                 assert(continue_label == step_block);
4513                 assert(break_label    == false_block);
4514                 continue_label = old_continue_label;
4515                 break_label    = old_break_label;
4516
4517                 if (get_cur_block() != NULL) {
4518                         jmp = new_Jmp();
4519                         add_immBlock_pred(step_block, jmp);
4520                 }
4521         } else {
4522                 body_block = step_block;
4523         }
4524
4525         /* create the condition */
4526         set_cur_block(header_block);
4527         if (statement->condition != NULL) {
4528                 create_condition_evaluation(statement->condition, body_block,
4529                                             false_block);
4530         } else {
4531                 keep_alive(header_block);
4532                 keep_all_memory(header_block);
4533                 jmp = new_Jmp();
4534                 add_immBlock_pred(body_block, jmp);
4535         }
4536
4537         mature_immBlock(body_block);
4538         mature_immBlock(false_block);
4539         mature_immBlock(step_block);
4540         mature_immBlock(header_block);
4541         mature_immBlock(false_block);
4542
4543         set_cur_block(false_block);
4544 }
4545
4546 static void create_jump_statement(const statement_t *statement,
4547                                   ir_node *target_block)
4548 {
4549         if (get_cur_block() == NULL)
4550                 return;
4551
4552         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4553         ir_node  *jump = new_d_Jmp(dbgi);
4554         add_immBlock_pred(target_block, jump);
4555
4556         set_cur_block(NULL);
4557 }
4558
4559 static ir_node *get_break_label(void)
4560 {
4561         if (break_label == NULL) {
4562                 ir_node *cur_block = get_cur_block();
4563                 break_label = new_immBlock();
4564                 set_cur_block(cur_block);
4565         }
4566         return break_label;
4567 }
4568
4569 static void switch_statement_to_firm(switch_statement_t *statement)
4570 {
4571         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4572
4573         ir_node *expression  = expression_to_firm(statement->expression);
4574         ir_node *cond        = new_d_Cond(dbgi, expression);
4575
4576         set_cur_block(NULL);
4577
4578         ir_node *const old_switch_cond       = current_switch_cond;
4579         ir_node *const old_break_label       = break_label;
4580         const bool     old_saw_default_label = saw_default_label;
4581         saw_default_label                    = false;
4582         current_switch_cond                  = cond;
4583         break_label                          = NULL;
4584         switch_statement_t *const old_switch = current_switch;
4585         current_switch                       = statement;
4586
4587         /* determine a free number for the default label */
4588         unsigned long num_cases = 0;
4589         long def_nr = 0;
4590         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4591                 if (l->expression == NULL) {
4592                         /* default case */
4593                         continue;
4594                 }
4595                 if (l->last_case >= l->first_case)
4596                         num_cases += l->last_case - l->first_case + 1;
4597                 if (l->last_case > def_nr)
4598                         def_nr = l->last_case;
4599         }
4600
4601         if (def_nr == INT_MAX) {
4602                 /* Bad: an overflow will occurr, we cannot be sure that the
4603                  * maximum + 1 is a free number. Scan the values a second
4604                  * time to find a free number.
4605                  */
4606                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4607
4608                 memset(bits, 0, (num_cases + 7) >> 3);
4609                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4610                         if (l->expression == NULL) {
4611                                 /* default case */
4612                                 continue;
4613                         }
4614                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4615                         if (start < num_cases && l->last_case >= 0) {
4616                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4617                                         (unsigned long)l->last_case : num_cases - 1;
4618                                 for (unsigned long cns = start; cns <= end; ++cns) {
4619                                         bits[cns >> 3] |= (1 << (cns & 7));
4620                                 }
4621                         }
4622                 }
4623                 /* We look at the first num_cases constants:
4624                  * Either they are densed, so we took the last (num_cases)
4625                  * one, or they are non densed, so we will find one free
4626                  * there...
4627                  */
4628                 unsigned long i;
4629                 for (i = 0; i < num_cases; ++i)
4630                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4631                                 break;
4632
4633                 free(bits);
4634                 def_nr = i;
4635         } else {
4636                 ++def_nr;
4637         }
4638         statement->default_proj_nr = def_nr;
4639
4640         if (statement->body != NULL) {
4641                 statement_to_firm(statement->body);
4642         }
4643
4644         if (get_cur_block() != NULL) {
4645                 ir_node *jmp = new_Jmp();
4646                 add_immBlock_pred(get_break_label(), jmp);
4647         }
4648
4649         if (!saw_default_label) {
4650                 set_cur_block(get_nodes_block(cond));
4651                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4652                                                         statement->default_proj_nr);
4653                 add_immBlock_pred(get_break_label(), proj);
4654         }
4655
4656         if (break_label != NULL) {
4657                 mature_immBlock(break_label);
4658         }
4659         set_cur_block(break_label);
4660
4661         assert(current_switch_cond == cond);
4662         current_switch      = old_switch;
4663         current_switch_cond = old_switch_cond;
4664         break_label         = old_break_label;
4665         saw_default_label   = old_saw_default_label;
4666 }
4667
4668 static void case_label_to_firm(const case_label_statement_t *statement)
4669 {
4670         if (statement->is_empty_range)
4671                 return;
4672
4673         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4674
4675         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4676
4677         ir_node *proj;
4678         ir_node *old_block = get_nodes_block(current_switch_cond);
4679         ir_node *block     = new_immBlock();
4680
4681         set_cur_block(old_block);
4682         if (statement->expression != NULL) {
4683                 long pn     = statement->first_case;
4684                 long end_pn = statement->last_case;
4685                 assert(pn <= end_pn);
4686                 /* create jumps for all cases in the given range */
4687                 do {
4688                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4689                         add_immBlock_pred(block, proj);
4690                 } while(pn++ < end_pn);
4691         } else {
4692                 saw_default_label = true;
4693                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4694                                          current_switch->default_proj_nr);
4695
4696                 add_immBlock_pred(block, proj);
4697         }
4698
4699         if (fallthrough != NULL) {
4700                 add_immBlock_pred(block, fallthrough);
4701         }
4702         mature_immBlock(block);
4703         set_cur_block(block);
4704
4705         if (statement->statement != NULL) {
4706                 statement_to_firm(statement->statement);
4707         }
4708 }
4709
4710 static void label_to_firm(const label_statement_t *statement)
4711 {
4712         ir_node *block = get_label_block(statement->label);
4713
4714         if (get_cur_block() != NULL) {
4715                 ir_node *jmp = new_Jmp();
4716                 add_immBlock_pred(block, jmp);
4717         }
4718
4719         set_cur_block(block);
4720         keep_alive(block);
4721         keep_all_memory(block);
4722
4723         if (statement->statement != NULL) {
4724                 statement_to_firm(statement->statement);
4725         }
4726 }
4727
4728 static void goto_to_firm(const goto_statement_t *statement)
4729 {
4730         if (get_cur_block() == NULL)
4731                 return;
4732
4733         if (statement->expression) {
4734                 ir_node  *irn  = expression_to_firm(statement->expression);
4735                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4736                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4737
4738                 set_irn_link(ijmp, ijmp_list);
4739                 ijmp_list = ijmp;
4740         } else {
4741                 ir_node *block = get_label_block(statement->label);
4742                 ir_node *jmp   = new_Jmp();
4743                 add_immBlock_pred(block, jmp);
4744         }
4745         set_cur_block(NULL);
4746 }
4747
4748 static void asm_statement_to_firm(const asm_statement_t *statement)
4749 {
4750         bool needs_memory = false;
4751
4752         if (statement->is_volatile) {
4753                 needs_memory = true;
4754         }
4755
4756         size_t         n_clobbers = 0;
4757         asm_clobber_t *clobber    = statement->clobbers;
4758         for ( ; clobber != NULL; clobber = clobber->next) {
4759                 const char *clobber_str = clobber->clobber.begin;
4760
4761                 if (!be_is_valid_clobber(clobber_str)) {
4762                         errorf(&statement->base.source_position,
4763                                    "invalid clobber '%s' specified", clobber->clobber);
4764                         continue;
4765                 }
4766
4767                 if (strcmp(clobber_str, "memory") == 0) {
4768                         needs_memory = true;
4769                         continue;
4770                 }
4771
4772                 ident *id = new_id_from_str(clobber_str);
4773                 obstack_ptr_grow(&asm_obst, id);
4774                 ++n_clobbers;
4775         }
4776         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4777         ident **clobbers = NULL;
4778         if (n_clobbers > 0) {
4779                 clobbers = obstack_finish(&asm_obst);
4780         }
4781
4782         size_t n_inputs  = 0;
4783         asm_argument_t *argument = statement->inputs;
4784         for ( ; argument != NULL; argument = argument->next)
4785                 n_inputs++;
4786         size_t n_outputs = 0;
4787         argument = statement->outputs;
4788         for ( ; argument != NULL; argument = argument->next)
4789                 n_outputs++;
4790
4791         unsigned next_pos = 0;
4792
4793         ir_node *ins[n_inputs + n_outputs + 1];
4794         size_t   in_size = 0;
4795
4796         ir_asm_constraint tmp_in_constraints[n_outputs];
4797
4798         const expression_t *out_exprs[n_outputs];
4799         ir_node            *out_addrs[n_outputs];
4800         size_t              out_size = 0;
4801
4802         argument = statement->outputs;
4803         for ( ; argument != NULL; argument = argument->next) {
4804                 const char *constraints = argument->constraints.begin;
4805                 asm_constraint_flags_t asm_flags
4806                         = be_parse_asm_constraints(constraints);
4807
4808                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4809                         errorf(&statement->base.source_position,
4810                                "some constraints in '%s' are not supported", constraints);
4811                         continue;
4812                 }
4813                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4814                         errorf(&statement->base.source_position,
4815                                "some constraints in '%s' are invalid", constraints);
4816                         continue;
4817                 }
4818                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4819                         errorf(&statement->base.source_position,
4820                                "no write flag specified for output constraints '%s'",
4821                                constraints);
4822                         continue;
4823                 }
4824
4825                 unsigned pos = next_pos++;
4826                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4827                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4828                         expression_t *expr = argument->expression;
4829                         ir_node      *addr = expression_to_addr(expr);
4830                         /* in+output, construct an artifical same_as constraint on the
4831                          * input */
4832                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4833                                 char     buf[64];
4834                                 ir_node *value = get_value_from_lvalue(expr, addr);
4835
4836                                 snprintf(buf, sizeof(buf), "%u", pos);
4837
4838                                 ir_asm_constraint constraint;
4839                                 constraint.pos              = pos;
4840                                 constraint.constraint       = new_id_from_str(buf);
4841                                 constraint.mode             = get_ir_mode(expr->base.type);
4842                                 tmp_in_constraints[in_size] = constraint;
4843                                 ins[in_size] = value;
4844
4845                                 ++in_size;
4846                         }
4847
4848                         out_exprs[out_size] = expr;
4849                         out_addrs[out_size] = addr;
4850                         ++out_size;
4851                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4852                         /* pure memory ops need no input (but we have to make sure we
4853                          * attach to the memory) */
4854                         assert(! (asm_flags &
4855                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4856                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4857                         needs_memory = true;
4858
4859                         /* we need to attach the address to the inputs */
4860                         expression_t *expr = argument->expression;
4861
4862                         ir_asm_constraint constraint;
4863                         constraint.pos              = pos;
4864                         constraint.constraint       = new_id_from_str(constraints);
4865                         constraint.mode             = NULL;
4866                         tmp_in_constraints[in_size] = constraint;
4867
4868                         ins[in_size]          = expression_to_addr(expr);
4869                         ++in_size;
4870                         continue;
4871                 } else {
4872                         errorf(&statement->base.source_position,
4873                                "only modifiers but no place set in constraints '%s'",
4874                                constraints);
4875                         continue;
4876                 }
4877
4878                 ir_asm_constraint constraint;
4879                 constraint.pos        = pos;
4880                 constraint.constraint = new_id_from_str(constraints);
4881                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4882
4883                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4884         }
4885         assert(obstack_object_size(&asm_obst)
4886                         == out_size * sizeof(ir_asm_constraint));
4887         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4888
4889
4890         obstack_grow(&asm_obst, tmp_in_constraints,
4891                      in_size * sizeof(tmp_in_constraints[0]));
4892         /* find and count input and output arguments */
4893         argument = statement->inputs;
4894         for ( ; argument != NULL; argument = argument->next) {
4895                 const char *constraints = argument->constraints.begin;
4896                 asm_constraint_flags_t asm_flags
4897                         = be_parse_asm_constraints(constraints);
4898
4899                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4900                         errorf(&statement->base.source_position,
4901                                "some constraints in '%s' are not supported", constraints);
4902                         continue;
4903                 }
4904                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4905                         errorf(&statement->base.source_position,
4906                                "some constraints in '%s' are invalid", constraints);
4907                         continue;
4908                 }
4909                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4910                         errorf(&statement->base.source_position,
4911                                "write flag specified for input constraints '%s'",
4912                                constraints);
4913                         continue;
4914                 }
4915
4916                 ir_node *input;
4917                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4918                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4919                         /* we can treat this as "normal" input */
4920                         input = expression_to_firm(argument->expression);
4921                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4922                         /* pure memory ops need no input (but we have to make sure we
4923                          * attach to the memory) */
4924                         assert(! (asm_flags &
4925                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4926                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4927                         needs_memory = true;
4928                         input = expression_to_addr(argument->expression);
4929                 } else {
4930                         errorf(&statement->base.source_position,
4931                                "only modifiers but no place set in constraints '%s'",
4932                                constraints);
4933                         continue;
4934                 }
4935
4936                 ir_asm_constraint constraint;
4937                 constraint.pos        = next_pos++;
4938                 constraint.constraint = new_id_from_str(constraints);
4939                 constraint.mode       = get_irn_mode(input);
4940
4941                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4942                 ins[in_size++] = input;
4943         }
4944
4945         if (needs_memory) {
4946                 ir_asm_constraint constraint;
4947                 constraint.pos        = next_pos++;
4948                 constraint.constraint = new_id_from_str("");
4949                 constraint.mode       = mode_M;
4950
4951                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4952                 ins[in_size++] = get_store();
4953         }
4954
4955         assert(obstack_object_size(&asm_obst)
4956                         == in_size * sizeof(ir_asm_constraint));
4957         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4958
4959         /* create asm node */
4960         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4961
4962         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4963
4964         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4965                                   out_size, output_constraints,
4966                                   n_clobbers, clobbers, asm_text);
4967
4968         if (statement->is_volatile) {
4969                 set_irn_pinned(node, op_pin_state_pinned);
4970         } else {
4971                 set_irn_pinned(node, op_pin_state_floats);
4972         }
4973
4974         /* create output projs & connect them */
4975         if (needs_memory) {
4976                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4977                 set_store(projm);
4978         }
4979
4980         size_t i;
4981         for (i = 0; i < out_size; ++i) {
4982                 const expression_t *out_expr = out_exprs[i];
4983                 long                pn       = i;
4984                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4985                 ir_node            *proj     = new_Proj(node, mode, pn);
4986                 ir_node            *addr     = out_addrs[i];
4987
4988                 set_value_for_expression_addr(out_expr, proj, addr);
4989         }
4990 }
4991
4992 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4993         statement_to_firm(statement->try_statement);
4994         warningf(&statement->base.source_position, "structured exception handling ignored");
4995 }
4996
4997 static void     leave_statement_to_firm(leave_statement_t *statement) {
4998         errorf(&statement->base.source_position, "__leave not supported yet");
4999 }
5000
5001 /**
5002  * Transform a statement.
5003  */
5004 static void statement_to_firm(statement_t *statement)
5005 {
5006 #ifndef NDEBUG
5007         assert(!statement->base.transformed);
5008         statement->base.transformed = true;
5009 #endif
5010
5011         switch (statement->kind) {
5012         case STATEMENT_INVALID:
5013                 panic("invalid statement found");
5014                 return;
5015         case STATEMENT_EMPTY:
5016                 /* nothing */
5017                 return;
5018         case STATEMENT_COMPOUND:
5019                 compound_statement_to_firm(&statement->compound);
5020                 return;
5021         case STATEMENT_RETURN:
5022                 return_statement_to_firm(&statement->returns);
5023                 return;
5024         case STATEMENT_EXPRESSION:
5025                 expression_statement_to_firm(&statement->expression);
5026                 return;
5027         case STATEMENT_IF:
5028                 if_statement_to_firm(&statement->ifs);
5029                 return;
5030         case STATEMENT_WHILE:
5031                 while_statement_to_firm(&statement->whiles);
5032                 return;
5033         case STATEMENT_DO_WHILE:
5034                 do_while_statement_to_firm(&statement->do_while);
5035                 return;
5036         case STATEMENT_DECLARATION:
5037                 declaration_statement_to_firm(&statement->declaration);
5038                 return;
5039         case STATEMENT_BREAK:
5040                 create_jump_statement(statement, get_break_label());
5041                 return;
5042         case STATEMENT_CONTINUE:
5043                 create_jump_statement(statement, continue_label);
5044                 return;
5045         case STATEMENT_SWITCH:
5046                 switch_statement_to_firm(&statement->switchs);
5047                 return;
5048         case STATEMENT_CASE_LABEL:
5049                 case_label_to_firm(&statement->case_label);
5050                 return;
5051         case STATEMENT_FOR:
5052                 for_statement_to_firm(&statement->fors);
5053                 return;
5054         case STATEMENT_LABEL:
5055                 label_to_firm(&statement->label);
5056                 return;
5057         case STATEMENT_LOCAL_LABEL:
5058                 /* local labels transform the semantics of labels while parsing
5059                  * they don't need any special treatment here */
5060                 return;
5061         case STATEMENT_GOTO:
5062                 goto_to_firm(&statement->gotos);
5063                 return;
5064         case STATEMENT_ASM:
5065                 asm_statement_to_firm(&statement->asms);
5066                 return;
5067         case STATEMENT_MS_TRY:
5068                 ms_try_statement_to_firm(&statement->ms_try);
5069                 return;
5070         case STATEMENT_LEAVE:
5071                 leave_statement_to_firm(&statement->leave);
5072                 return;
5073         }
5074         panic("Statement not implemented\n");
5075 }
5076
5077 static int count_local_variables(const entity_t *entity,
5078                                  const entity_t *const end)
5079 {
5080         int count = 0;
5081         for (; entity != end; entity = entity->base.next) {
5082                 if (entity->kind != ENTITY_VARIABLE)
5083                         continue;
5084                 type_t *type = skip_typeref(entity->declaration.type);
5085
5086                 if (!entity->variable.address_taken && is_type_scalar(type))
5087                         ++count;
5088         }
5089         return count;
5090 }
5091
5092 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5093 {
5094         int *const count = env;
5095
5096         switch (stmt->kind) {
5097         case STATEMENT_DECLARATION: {
5098                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5099                 *count += count_local_variables(decl_stmt->declarations_begin,
5100                                                                                 decl_stmt->declarations_end->base.next);
5101                 break;
5102         }
5103
5104         case STATEMENT_FOR:
5105                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5106                 break;
5107
5108         default:
5109                 break;
5110         }
5111 }
5112
5113 static int get_function_n_local_vars(entity_t *entity)
5114 {
5115         int count = 0;
5116
5117         /* count parameters */
5118         count += count_local_variables(entity->function.parameters.entities, NULL);
5119
5120         /* count local variables declared in body */
5121         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5122                         &count);
5123         return count;
5124 }
5125
5126 static void initialize_function_parameters(entity_t *entity)
5127 {
5128         assert(entity->kind == ENTITY_FUNCTION);
5129         ir_graph *irg             = current_ir_graph;
5130         ir_node  *args            = get_irg_args(irg);
5131         ir_node  *start_block     = get_irg_start_block(irg);
5132         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5133
5134         int       n         = 0;
5135         entity_t *parameter = entity->function.parameters.entities;
5136         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5137                 assert(parameter->kind == ENTITY_VARIABLE);
5138                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5139                 type_t *type = skip_typeref(parameter->declaration.type);
5140
5141                 bool needs_entity = parameter->variable.address_taken;
5142                 assert(!is_type_array(type));
5143                 if (is_type_compound(type)) {
5144                         needs_entity = true;
5145                 }
5146
5147                 if (needs_entity) {
5148                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5149                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5150                         set_entity_ident(entity, id);
5151
5152                         parameter->declaration.kind
5153                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5154                         parameter->variable.v.entity = entity;
5155                         continue;
5156                 }
5157
5158                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5159                 ir_mode *param_mode   = get_type_mode(param_irtype);
5160
5161                 long     pn    = n;
5162                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5163
5164                 ir_mode *mode = get_ir_mode(type);
5165                 value = create_conv(NULL, value, mode);
5166                 value = do_strict_conv(NULL, value);
5167
5168                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5169                 parameter->variable.v.value_number = next_value_number_function;
5170                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5171                                         (variable_t*) &parameter->variable);
5172                 ++next_value_number_function;
5173
5174                 set_value(parameter->variable.v.value_number, value);
5175         }
5176 }
5177
5178 /**
5179  * Handle additional decl modifiers for IR-graphs
5180  *
5181  * @param irg            the IR-graph
5182  * @param dec_modifiers  additional modifiers
5183  */
5184 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5185 {
5186         if (decl_modifiers & DM_NORETURN) {
5187                 /* TRUE if the declaration includes the Microsoft
5188                    __declspec(noreturn) specifier. */
5189                 set_irg_additional_property(irg, mtp_property_noreturn);
5190         }
5191         if (decl_modifiers & DM_NOTHROW) {
5192                 /* TRUE if the declaration includes the Microsoft
5193                    __declspec(nothrow) specifier. */
5194                 set_irg_additional_property(irg, mtp_property_nothrow);
5195         }
5196         if (decl_modifiers & DM_NAKED) {
5197                 /* TRUE if the declaration includes the Microsoft
5198                    __declspec(naked) specifier. */
5199                 set_irg_additional_property(irg, mtp_property_naked);
5200         }
5201         if (decl_modifiers & DM_FORCEINLINE) {
5202                 /* TRUE if the declaration includes the
5203                    Microsoft __forceinline specifier. */
5204                 set_irg_inline_property(irg, irg_inline_forced);
5205         }
5206         if (decl_modifiers & DM_NOINLINE) {
5207                 /* TRUE if the declaration includes the Microsoft
5208                    __declspec(noinline) specifier. */
5209                 set_irg_inline_property(irg, irg_inline_forbidden);
5210         }
5211 }
5212
5213 static void add_function_pointer(ir_type *segment, ir_entity *method,
5214                                  const char *unique_template)
5215 {
5216         ir_type   *method_type  = get_entity_type(method);
5217         ident     *id           = id_unique(unique_template);
5218         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5219
5220         ident     *ide          = id_unique(unique_template);
5221         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5222         ir_graph  *irg          = get_const_code_irg();
5223         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5224                                                            method, NULL);
5225
5226         set_entity_compiler_generated(ptr, 1);
5227         set_entity_variability(ptr, variability_constant);
5228         set_atomic_ent_value(ptr, val);
5229 }
5230
5231 /**
5232  * Generate possible IJmp branches to a given label block.
5233  */
5234 static void gen_ijmp_branches(ir_node *block) {
5235         ir_node *ijmp;
5236         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5237                 add_immBlock_pred(block, ijmp);
5238         }
5239 }
5240
5241 /**
5242  * Create code for a function.
5243  */
5244 static void create_function(entity_t *entity)
5245 {
5246         assert(entity->kind == ENTITY_FUNCTION);
5247         ir_entity *function_entity = get_function_entity(entity);
5248
5249         if (entity->function.statement == NULL)
5250                 return;
5251
5252         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5253                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5254                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5255         }
5256         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5257                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5258                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5259         }
5260
5261         current_function_entity = entity;
5262         current_function_name   = NULL;
5263         current_funcsig         = NULL;
5264
5265         assert(all_labels == NULL);
5266         all_labels = NEW_ARR_F(label_t *, 0);
5267         ijmp_list  = NULL;
5268
5269         int       n_local_vars = get_function_n_local_vars(entity);
5270         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5271
5272         ir_graph *old_current_function = current_function;
5273         current_function = irg;
5274
5275         set_irg_fp_model(irg, firm_opt.fp_model);
5276         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5277         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5278
5279         ir_node *first_block = get_cur_block();
5280
5281         /* set inline flags */
5282         if (entity->function.is_inline)
5283                 set_irg_inline_property(irg, irg_inline_recomended);
5284         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5285
5286         next_value_number_function = 0;
5287         initialize_function_parameters(entity);
5288
5289         statement_to_firm(entity->function.statement);
5290
5291         ir_node *end_block = get_irg_end_block(irg);
5292
5293         /* do we have a return statement yet? */
5294         if (get_cur_block() != NULL) {
5295                 type_t *type = skip_typeref(entity->declaration.type);
5296                 assert(is_type_function(type));
5297                 const function_type_t *func_type   = &type->function;
5298                 const type_t          *return_type
5299                         = skip_typeref(func_type->return_type);
5300
5301                 ir_node *ret;
5302                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5303                         ret = new_Return(get_store(), 0, NULL);
5304                 } else {
5305                         ir_mode *mode;
5306                         if (is_type_scalar(return_type)) {
5307                                 mode = get_ir_mode(func_type->return_type);
5308                         } else {
5309                                 mode = mode_P_data;
5310                         }
5311
5312                         ir_node *in[1];
5313                         /* §5.1.2.2.3 main implicitly returns 0 */
5314                         if (is_main(entity)) {
5315                                 in[0] = new_Const(mode, get_mode_null(mode));
5316                         } else {
5317                                 in[0] = new_Unknown(mode);
5318                         }
5319                         ret = new_Return(get_store(), 1, in);
5320                 }
5321                 add_immBlock_pred(end_block, ret);
5322         }
5323
5324         bool has_computed_gotos = false;
5325         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5326                 label_t *label = all_labels[i];
5327                 if (label->address_taken) {
5328                         gen_ijmp_branches(label->block);
5329                         has_computed_gotos = true;
5330                 }
5331                 mature_immBlock(label->block);
5332         }
5333         if (has_computed_gotos) {
5334                 /* if we have computed goto's in the function, we cannot inline it */
5335                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5336                         warningf(&entity->base.source_position,
5337                                  "function '%Y' can never be inlined because it contains a computed goto",
5338                                  entity->base.symbol);
5339                 }
5340                 set_irg_inline_property(irg, irg_inline_forbidden);
5341         }
5342
5343         DEL_ARR_F(all_labels);
5344         all_labels = NULL;
5345
5346         mature_immBlock(first_block);
5347         mature_immBlock(end_block);
5348
5349         irg_finalize_cons(irg);
5350
5351         /* finalize the frame type */
5352         ir_type *frame_type = get_irg_frame_type(irg);
5353         int      n          = get_compound_n_members(frame_type);
5354         int      align_all  = 4;
5355         int      offset     = 0;
5356         for (int i = 0; i < n; ++i) {
5357                 ir_entity *entity      = get_compound_member(frame_type, i);
5358                 ir_type   *entity_type = get_entity_type(entity);
5359
5360                 int align = get_type_alignment_bytes(entity_type);
5361                 if (align > align_all)
5362                         align_all = align;
5363                 int misalign = 0;
5364                 if (align > 0) {
5365                         misalign  = offset % align;
5366                         if (misalign > 0) {
5367                                 offset += align - misalign;
5368                         }
5369                 }
5370
5371                 set_entity_offset(entity, offset);
5372                 offset += get_type_size_bytes(entity_type);
5373         }
5374         set_type_size_bytes(frame_type, offset);
5375         set_type_alignment_bytes(frame_type, align_all);
5376
5377         irg_vrfy(irg);
5378         current_function = old_current_function;
5379
5380         /* create inner functions */
5381         entity_t *inner;
5382         for (inner = next_inner_function(); inner != NULL;
5383              inner = next_inner_function()) {
5384                 create_function(inner);
5385         }
5386 }
5387
5388 static void scope_to_firm(scope_t *scope)
5389 {
5390         /* first pass: create declarations */
5391         entity_t *entity = scope->entities;
5392         for ( ; entity != NULL; entity = entity->base.next) {
5393                 if (entity->base.symbol == NULL)
5394                         continue;
5395
5396                 if (entity->kind == ENTITY_FUNCTION) {
5397                         get_function_entity(entity);
5398                 } else if (entity->kind == ENTITY_VARIABLE) {
5399                         create_global_variable(entity);
5400                 }
5401         }
5402
5403         /* second pass: create code/initializers */
5404         entity = scope->entities;
5405         for ( ; entity != NULL; entity = entity->base.next) {
5406                 if (entity->base.symbol == NULL)
5407                         continue;
5408
5409                 if (entity->kind == ENTITY_FUNCTION) {
5410                         create_function(entity);
5411                 } else if (entity->kind == ENTITY_VARIABLE) {
5412                         assert(entity->declaration.kind
5413                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5414                         current_ir_graph = get_const_code_irg();
5415                         create_variable_initializer(entity);
5416                 }
5417         }
5418 }
5419
5420 void init_ast2firm(void)
5421 {
5422         obstack_init(&asm_obst);
5423         init_atomic_modes();
5424
5425         /* OS option must be set to the backend */
5426         switch (firm_opt.os_support) {
5427         case OS_SUPPORT_MINGW:
5428                 create_ld_ident = create_name_win32;
5429                 break;
5430         case OS_SUPPORT_LINUX:
5431                 create_ld_ident = create_name_linux_elf;
5432                 break;
5433         case OS_SUPPORT_MACHO:
5434                 create_ld_ident = create_name_macho;
5435                 break;
5436         default:
5437                 panic("unexpected OS support mode");
5438         }
5439
5440         /* create idents for all known runtime functions */
5441         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5442                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5443         }
5444
5445         entitymap_init(&entitymap);
5446 }
5447
5448 static void init_ir_types(void)
5449 {
5450         static int ir_types_initialized = 0;
5451         if (ir_types_initialized)
5452                 return;
5453         ir_types_initialized = 1;
5454
5455         ir_type_int        = get_ir_type(type_int);
5456         ir_type_const_char = get_ir_type(type_const_char);
5457         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5458         ir_type_void       = get_ir_type(type_void);
5459 }
5460
5461 void exit_ast2firm(void)
5462 {
5463         entitymap_destroy(&entitymap);
5464         obstack_free(&asm_obst, NULL);
5465 }
5466
5467 static void global_asm_to_firm(statement_t *s)
5468 {
5469         for (; s != NULL; s = s->base.next) {
5470                 assert(s->kind == STATEMENT_ASM);
5471
5472                 char const *const text = s->asms.asm_text.begin;
5473                 size_t            size = s->asms.asm_text.size;
5474
5475                 /* skip the last \0 */
5476                 if (text[size - 1] == '\0')
5477                         --size;
5478
5479                 ident *const id = new_id_from_chars(text, size);
5480                 add_irp_asm(id);
5481         }
5482 }
5483
5484 void translation_unit_to_firm(translation_unit_t *unit)
5485 {
5486         /* just to be sure */
5487         continue_label           = NULL;
5488         break_label              = NULL;
5489         current_switch_cond      = NULL;
5490         current_translation_unit = unit;
5491
5492         init_ir_types();
5493         inner_functions = NEW_ARR_F(entity_t *, 0);
5494
5495         scope_to_firm(&unit->scope);
5496         global_asm_to_firm(unit->global_asm);
5497
5498         DEL_ARR_F(inner_functions);
5499         inner_functions  = NULL;
5500
5501         current_ir_graph         = NULL;
5502         current_translation_unit = NULL;
5503 }