nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "warning.h"
  43 #include "entitymap_t.h"
  44 #include "driver/firm_opt.h"
  45 #include "driver/firm_cmdline.h"
  46
  47 /* some idents needed for name mangling */
  48 static ident *id_underscore;
  49 static ident *id_imp;
  50
  51 static ir_type *ir_type_const_char;
  52 static ir_type *ir_type_wchar_t;
  53 static ir_type *ir_type_void;
  54 static ir_type *ir_type_int;
  55
  56 static type_t *type_const_char;
  57
  58 static int       next_value_number_function;
  59 static ir_node  *continue_label;
  60 static ir_node  *break_label;
  61 static ir_node  *current_switch_cond;
  62 static bool      saw_default_label;
  63 static ir_node **imature_blocks;
  64 static bool constant_folding;
  65
  66 static const declaration_t *current_function_decl;
  67 static ir_node             *current_function_name;
  68 static ir_node             *current_funcsig;
  69 static switch_statement_t  *current_switch;
  70
  71 static entitymap_t  entitymap;
  72
  73 static struct obstack asm_obst;
  74
  75 typedef enum declaration_kind_t {
  76         DECLARATION_KIND_UNKNOWN,
  77         DECLARATION_KIND_FUNCTION,
  78         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  79         DECLARATION_KIND_GLOBAL_VARIABLE,
  80         DECLARATION_KIND_LOCAL_VARIABLE,
  81         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  82         DECLARATION_KIND_COMPOUND_MEMBER,
  83         DECLARATION_KIND_LABEL_BLOCK,
  84         DECLARATION_KIND_ENUM_ENTRY,
  85         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  86         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  87         DECLARATION_KIND_TYPE
  88 } declaration_kind_t;
  89
  90 static ir_type *get_ir_type(type_t *type);
  91 static ir_type *get_ir_type_incomplete(type_t *type);
  92 static int count_decls_in_stmts(const statement_t *stmt);
  93
  94 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  95 {
  96         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  97
  98         if (declaration != NULL) {
  99                 warningf(&declaration->source_position,
 100                          "variable '%#T' might be used uninitialized",
 101                          declaration->type, declaration->symbol);
 102         }
 103         return new_r_Unknown(irg, mode);
 104 }
 105
 106 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 107 {
 108         const source_position_t *pos = (const source_position_t*) dbg;
 109         if (pos == NULL)
 110                 return 0;
 111         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 112                                    pos->linenr);
 113 }
 114
 115 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 116 {
 117         const source_position_t *pos = (const source_position_t*) dbg;
 118         if (pos == NULL)
 119                 return NULL;
 120         if (line != NULL)
 121                 *line = pos->linenr;
 122         return pos->input_name;
 123 }
 124
 125 static dbg_info *get_dbg_info(const source_position_t *pos)
 126 {
 127         return (dbg_info*) pos;
 128 }
 129
 130 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 131
 132 static ir_mode *mode_int, *mode_uint;
 133
 134 static ir_node *_expression_to_firm(const expression_t *expression);
 135 static ir_node *expression_to_firm(const expression_t *expression);
 136 static inline ir_mode *get_ir_mode(type_t *type);
 137 static void create_local_declaration(declaration_t *declaration);
 138
 139 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 140 {
 141         unsigned flags = get_atomic_type_flags(kind);
 142         unsigned size  = get_atomic_type_size(kind);
 143         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 144                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 145                 char            name[64];
 146                 ir_mode_sort    sort;
 147                 unsigned        bit_size     = size * 8;
 148                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 149                 ir_mode_arithmetic arithmetic;
 150                 unsigned        modulo_shift;
 151
 152                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 153                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 154                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 155                         sort         = irms_int_number;
 156                         arithmetic   = irma_twos_complement;
 157                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 158                 } else {
 159                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 160                         snprintf(name, sizeof(name), "f%d", bit_size);
 161                         sort         = irms_float_number;
 162                         arithmetic   = irma_ieee754;
 163                         modulo_shift = 0;
 164                 }
 165                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 166                                    modulo_shift);
 167         }
 168
 169         return NULL;
 170 }
 171
 172 /**
 173  * Initialises the atomic modes depending on the machine size.
 174  */
 175 static void init_atomic_modes(void)
 176 {
 177         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 178                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 179         }
 180         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 181         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 182
 183         /* there's no real void type in firm */
 184         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 185
 186         /* initialize pointer modes */
 187         char            name[64];
 188         ir_mode_sort    sort         = irms_reference;
 189         unsigned        bit_size     = machine_size;
 190         bool            is_signed    = 0;
 191         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 192         unsigned        modulo_shift
 193                 = bit_size < machine_size ? machine_size : bit_size;
 194
 195         snprintf(name, sizeof(name), "p%d", machine_size);
 196         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                         modulo_shift);
 198
 199         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 200         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 201
 202         /* Hmm, pointers should be machine size */
 203         set_modeP_data(ptr_mode);
 204         set_modeP_code(ptr_mode);
 205 }
 206
 207 static unsigned get_compound_type_size(compound_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type((type_t*) type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_array_type_size(array_type_t *type)
 214 {
 215         assert(!type->is_vla);
 216         ir_type *irtype = get_ir_type((type_t*) type);
 217         return get_type_size_bytes(irtype);
 218 }
 219
 220
 221 static unsigned get_type_size_const(type_t *type)
 222 {
 223         switch(type->kind) {
 224         case TYPE_ERROR:
 225                 panic("error type occurred");
 226         case TYPE_ATOMIC:
 227                 return get_atomic_type_size(type->atomic.akind);
 228         case TYPE_COMPLEX:
 229                 return 2 * get_atomic_type_size(type->complex.akind);
 230         case TYPE_IMAGINARY:
 231                 return get_atomic_type_size(type->imaginary.akind);
 232         case TYPE_ENUM:
 233                 return get_mode_size_bytes(mode_int);
 234         case TYPE_COMPOUND_UNION:
 235         case TYPE_COMPOUND_STRUCT:
 236                 return get_compound_type_size(&type->compound);
 237         case TYPE_FUNCTION:
 238                 /* just a pointer to the function */
 239                 return get_mode_size_bytes(mode_P_code);
 240         case TYPE_POINTER:
 241                 return get_mode_size_bytes(mode_P_data);
 242         case TYPE_ARRAY:
 243                 return get_array_type_size(&type->array);
 244         case TYPE_BUILTIN:
 245                 return get_type_size_const(type->builtin.real_type);
 246         case TYPE_BITFIELD:
 247                 panic("type size of bitfield request");
 248         case TYPE_TYPEDEF:
 249         case TYPE_TYPEOF:
 250         case TYPE_INVALID:
 251                 break;
 252         }
 253         panic("Trying to determine size of invalid type");
 254 }
 255
 256 static ir_node *get_type_size(type_t *type)
 257 {
 258         type = skip_typeref(type);
 259
 260         if (is_type_array(type) && type->array.is_vla) {
 261                 ir_node *size_node = type->array.size_node;
 262                 if (size_node == NULL) {
 263                         size_node = expression_to_firm(type->array.size_expression);
 264                         assert(!is_Const(size_node));
 265                         type->array.size_node = size_node;
 266                 }
 267
 268                 ir_node *elem_size = get_type_size(type->array.element_type);
 269                 ir_mode *mode      = get_irn_mode(size_node);
 270                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 271                 return real_size;
 272         }
 273
 274         ir_mode *mode = get_ir_mode(type_size_t);
 275         symconst_symbol sym;
 276         sym.type_p = get_ir_type(type);
 277         return new_SymConst(mode, sym, symconst_type_size);
 278 }
 279
 280 static unsigned count_parameters(const function_type_t *function_type)
 281 {
 282         unsigned count = 0;
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         for ( ; parameter != NULL; parameter = parameter->next) {
 286                 ++count;
 287         }
 288
 289         return count;
 290 }
 291
 292 /**
 293  * Creates a Firm type for an atomic type
 294  */
 295 static ir_type *create_atomic_type(const atomic_type_t *type)
 296 {
 297         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 298         atomic_type_kind_t  kind      = type->akind;
 299         ir_mode            *mode      = _atomic_modes[kind];
 300         ident              *id        = get_mode_ident(mode);
 301         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 302
 303         set_type_alignment_bytes(irtype, type->base.alignment);
 304
 305         return irtype;
 306 }
 307
 308 /**
 309  * Creates a Firm type for a complex type
 310  */
 311 static ir_type *create_complex_type(const complex_type_t *type)
 312 {
 313         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 314         atomic_type_kind_t  kind      = type->akind;
 315         ir_mode            *mode      = _atomic_modes[kind];
 316         ident              *id        = get_mode_ident(mode);
 317
 318         (void) id;
 319         (void) dbgi;
 320
 321         /* FIXME: finish the array */
 322         return NULL;
 323 }
 324
 325 /**
 326  * Creates a Firm type for an imaginary type
 327  */
 328 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 329 {
 330         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 331         atomic_type_kind_t  kind      = type->akind;
 332         ir_mode            *mode      = _atomic_modes[kind];
 333         ident              *id        = get_mode_ident(mode);
 334         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 335
 336         set_type_alignment_bytes(irtype, type->base.alignment);
 337
 338         return irtype;
 339 }
 340
 341 /**
 342  * return type of a parameter (and take transparent union gnu extension into
 343  * account)
 344  */
 345 static type_t *get_parameter_type(type_t *type)
 346 {
 347         type = skip_typeref(type);
 348         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 349                 declaration_t *decl = type->compound.declaration;
 350                 type                = decl->scope.declarations->type;
 351         }
 352
 353         return type;
 354 }
 355
 356 static ir_type *create_method_type(const function_type_t *function_type)
 357 {
 358         type_t  *return_type  = function_type->return_type;
 359
 360         ident   *id           = id_unique("functiontype.%u");
 361         int      n_parameters = count_parameters(function_type);
 362         int      n_results    = return_type == type_void ? 0 : 1;
 363         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 364         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 365
 366         if (return_type != type_void) {
 367                 ir_type *restype = get_ir_type(return_type);
 368                 set_method_res_type(irtype, 0, restype);
 369         }
 370
 371         function_parameter_t *parameter = function_type->parameters;
 372         int                   n         = 0;
 373         for ( ; parameter != NULL; parameter = parameter->next) {
 374                 type_t  *type     = get_parameter_type(parameter->type);
 375                 ir_type *p_irtype = get_ir_type(type);
 376                 set_method_param_type(irtype, n, p_irtype);
 377                 ++n;
 378         }
 379
 380         if (function_type->variadic || function_type->unspecified_parameters) {
 381                 set_method_variadicity(irtype, variadicity_variadic);
 382         }
 383
 384         unsigned cc = get_method_calling_convention(irtype);
 385         switch (function_type->calling_convention) {
 386         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 387         case CC_CDECL:
 388 is_cdecl:
 389                 set_method_calling_convention(irtype, SET_CDECL(cc));
 390                 break;
 391
 392         case CC_STDCALL:
 393                 if (function_type->variadic || function_type->unspecified_parameters)
 394                         goto is_cdecl;
 395
 396                 /* only non-variadic function can use stdcall, else use cdecl */
 397                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 398                 break;
 399
 400         case CC_FASTCALL:
 401                 if (function_type->variadic || function_type->unspecified_parameters)
 402                         goto is_cdecl;
 403                 /* only non-variadic function can use fastcall, else use cdecl */
 404                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 405                 break;
 406
 407         case CC_THISCALL:
 408                 /* Hmm, leave default, not accepted by the parser yet. */
 409                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 410                 break;
 411         }
 412         return irtype;
 413 }
 414
 415 static ir_type *create_pointer_type(pointer_type_t *type)
 416 {
 417         type_t   *points_to    = type->points_to;
 418         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 419         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 420         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 421                                                     ir_points_to, mode_P_data, dbgi);
 422
 423         return ir_type;
 424 }
 425
 426 static ir_type *create_array_type(array_type_t *type)
 427 {
 428         type_t  *element_type    = type->element_type;
 429         ir_type *ir_element_type = get_ir_type(element_type);
 430
 431         ident    *id      = id_unique("array.%u");
 432         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 433         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 434
 435         const int align = get_type_alignment_bytes(ir_element_type);
 436         set_type_alignment_bytes(ir_type, align);
 437
 438         if (type->size_constant) {
 439                 int n_elements = type->size;
 440
 441                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 442
 443                 size_t elemsize = get_type_size_bytes(ir_element_type);
 444                 if (elemsize % align > 0) {
 445                         elemsize += align - (elemsize % align);
 446                 }
 447                 set_type_size_bytes(ir_type, n_elements * elemsize);
 448         } else {
 449                 set_array_lower_bound_int(ir_type, 0, 0);
 450         }
 451         set_type_state(ir_type, layout_fixed);
 452
 453         return ir_type;
 454 }
 455
 456 /**
 457  * Return the signed integer type of size bits.
 458  *
 459  * @param size   the size
 460  */
 461 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 462                                                  unsigned size)
 463 {
 464         static ir_mode *s_modes[64 + 1] = {NULL, };
 465         ir_type *res;
 466         ir_mode *mode;
 467
 468         if (size <= 0 || size > 64)
 469                 return NULL;
 470
 471         mode = s_modes[size];
 472         if (mode == NULL) {
 473                 char name[32];
 474
 475                 snprintf(name, sizeof(name), "bf_I%u", size);
 476                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 477                                    size <= 32 ? 32 : size );
 478                 s_modes[size] = mode;
 479         }
 480
 481         char name[32];
 482         snprintf(name, sizeof(name), "I%u", size);
 483         ident *id = new_id_from_str(name);
 484         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 485         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 486         set_primitive_base_type(res, base_tp);
 487
 488         return res;
 489 }
 490
 491 /**
 492  * Return the unsigned integer type of size bits.
 493  *
 494  * @param size   the size
 495  */
 496 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 497                                                    unsigned size)
 498 {
 499         static ir_mode *u_modes[64 + 1] = {NULL, };
 500         ir_type *res;
 501         ir_mode *mode;
 502
 503         if (size <= 0 || size > 64)
 504                 return NULL;
 505
 506         mode = u_modes[size];
 507         if (mode == NULL) {
 508                 char name[32];
 509
 510                 snprintf(name, sizeof(name), "bf_U%u", size);
 511                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 512                                    size <= 32 ? 32 : size );
 513                 u_modes[size] = mode;
 514         }
 515
 516         char name[32];
 517
 518         snprintf(name, sizeof(name), "U%u", size);
 519         ident *id = new_id_from_str(name);
 520         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 521         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 522         set_primitive_base_type(res, base_tp);
 523
 524         return res;
 525 }
 526
 527 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 528 {
 529         type_t *base = skip_typeref(type->base_type);
 530         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 531         ir_type *irbase = get_ir_type(base);
 532
 533         unsigned size = fold_constant(type->size);
 534
 535         assert(!is_type_float(base));
 536         if (is_type_signed(base)) {
 537                 return get_signed_int_type_for_bit_size(irbase, size);
 538         } else {
 539                 return get_unsigned_int_type_for_bit_size(irbase, size);
 540         }
 541 }
 542
 543 #define INVALID_TYPE ((ir_type_ptr)-1)
 544
 545 enum {
 546         COMPOUND_IS_STRUCT = false,
 547         COMPOUND_IS_UNION  = true
 548 };
 549
 550 /**
 551  * Construct firm type from ast struct type.
 552  *
 553  * As anonymous inner structs get flattened to a single firm type, we might get
 554  * irtype, outer_offset and out_align passed (they represent the position of
 555  * the anonymous inner struct inside the resulting firm struct)
 556  */
 557 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 558                                      size_t *outer_offset, size_t *outer_align,
 559                                      bool incomplete, bool is_union)
 560 {
 561         declaration_t      *declaration = type->declaration;
 562         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 563
 564         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 565                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 566                                 && incomplete))
 567                 return declaration->v.irtype;
 568
 569         size_t align_all  = 1;
 570         size_t offset     = 0;
 571         size_t bit_offset = 0;
 572         size_t size       = 0;
 573
 574         if (irtype == NULL) {
 575                 symbol_t *symbol = declaration->symbol;
 576                 ident    *id;
 577                 if (symbol != NULL) {
 578                         id = new_id_from_str(symbol->string);
 579                 } else {
 580                         if (is_union) {
 581                                 id = id_unique("__anonymous_union.%u");
 582                         } else {
 583                                 id = id_unique("__anonymous_struct.%u");
 584                         }
 585                 }
 586                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 587
 588                 if (is_union) {
 589                         irtype = new_d_type_union(id, dbgi);
 590                 } else {
 591                         irtype = new_d_type_struct(id, dbgi);
 592                 }
 593
 594                 declaration->declaration_kind
 595                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 596                 declaration->v.irtype         = irtype;
 597                 //type->base.firm_type          = irtype;
 598         } else {
 599                 offset    = *outer_offset;
 600                 align_all = *outer_align;
 601         }
 602
 603         if (incomplete)
 604                 return irtype;
 605
 606         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 607
 608         declaration_t *entry = declaration->scope.declarations;
 609         for( ; entry != NULL; entry = entry->next) {
 610                 if (entry->namespc != NAMESPACE_NORMAL)
 611                         continue;
 612
 613                 size_t prev_offset = offset;
 614
 615                 symbol_t *symbol     = entry->symbol;
 616                 type_t   *entry_type = skip_typeref(entry->type);
 617                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 618
 619                 ident    *ident;
 620                 if (symbol != NULL) {
 621                         ident = new_id_from_str(symbol->string);
 622                 } else {
 623                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 624                                 create_compound_type(&entry_type->compound, irtype, &offset,
 625                                                      &align_all, false, COMPOUND_IS_STRUCT);
 626                                 goto finished_member;
 627                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 628                                 create_compound_type(&entry_type->compound, irtype, &offset,
 629                                                      &align_all, false, COMPOUND_IS_UNION);
 630                                 goto finished_member;
 631                         } else {
 632                                 assert(entry_type->kind == TYPE_BITFIELD);
 633                         }
 634                         ident = id_unique("anon.%u");
 635                 }
 636
 637                 ir_type *base_irtype;
 638                 if (entry_type->kind == TYPE_BITFIELD) {
 639                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 640                 } else {
 641                         base_irtype = get_ir_type(entry_type);
 642                 }
 643
 644                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 645                 size_t misalign        = offset % entry_alignment;
 646
 647                 ir_type   *entry_irtype = get_ir_type(entry_type);
 648                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 649
 650                 size_t base;
 651                 size_t bits_remainder;
 652                 if (entry_type->kind == TYPE_BITFIELD) {
 653                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 654                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 655
 656                         if (size_bits > rest_size_bits) {
 657                                 /* start a new bucket */
 658                                 offset     += entry_alignment - misalign;
 659                                 bit_offset  = 0;
 660
 661                                 base           = offset;
 662                                 bits_remainder = 0;
 663                         } else {
 664                                 /* put into current bucket */
 665                                 base           = offset - misalign;
 666                                 bits_remainder = misalign * 8 + bit_offset;
 667                         }
 668
 669                         offset     += size_bits / 8;
 670                         bit_offset  = bit_offset + (size_bits % 8);
 671                 } else {
 672                         size_t entry_size = get_type_size_bytes(base_irtype);
 673                         if (misalign > 0 || bit_offset > 0)
 674                                 offset += entry_alignment - misalign;
 675
 676                         base           = offset;
 677                         bits_remainder = 0;
 678                         offset        += entry_size;
 679                         bit_offset     = 0;
 680                 }
 681
 682                 if (entry_alignment > align_all) {
 683                         if (entry_alignment % align_all != 0) {
 684                                 panic("uneven alignments not supported yet");
 685                         }
 686                         align_all = entry_alignment;
 687                 }
 688
 689                 set_entity_offset(entity, base);
 690                 set_entity_offset_bits_remainder(entity,
 691                                                  (unsigned char) bits_remainder);
 692                 //add_struct_member(irtype, entity);
 693                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 694                 assert(entry->v.entity == NULL);
 695                 entry->v.entity         = entity;
 696
 697 finished_member:
 698                 if (is_union) {
 699                         size_t entry_size = offset - prev_offset;
 700                         if (entry_size > size) {
 701                                 size = entry_size;
 702                         }
 703                         offset     = 0;
 704                         bit_offset = 0;
 705                 }
 706         }
 707
 708         if (!is_union) {
 709                 size = offset;
 710         }
 711
 712         size_t misalign = offset % align_all;
 713         if (misalign > 0 || bit_offset > 0) {
 714                 size += align_all - misalign;
 715         }
 716
 717         if (outer_offset != NULL) {
 718                 if (!is_union) {
 719                         *outer_offset = offset;
 720                 } else {
 721                         *outer_offset += size;
 722                 }
 723
 724                 if (align_all > *outer_align) {
 725                         if (align_all % *outer_align != 0) {
 726                                 panic("uneven alignments not supported yet");
 727                         }
 728                         *outer_align = align_all;
 729                 }
 730         } else {
 731                 set_type_alignment_bytes(irtype, align_all);
 732                 set_type_size_bytes(irtype, size);
 733                 set_type_state(irtype, layout_fixed);
 734         }
 735
 736         return irtype;
 737 }
 738
 739 static ir_type *create_enum_type(enum_type_t *const type)
 740 {
 741         type->base.firm_type = ir_type_int;
 742
 743         ir_mode *const mode    = mode_int;
 744         tarval  *const one     = get_mode_one(mode);
 745         tarval  *      tv_next = get_tarval_null(mode);
 746
 747         bool constant_folding_old = constant_folding;
 748         constant_folding = true;
 749
 750         declaration_t *declaration = type->declaration->next;
 751         for (; declaration != NULL; declaration = declaration->next) {
 752                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 753                         break;
 754
 755                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 756
 757                 expression_t *const init = declaration->init.enum_value;
 758                 if (init != NULL) {
 759                         ir_node *const cnst = expression_to_firm(init);
 760                         if (!is_Const(cnst)) {
 761                                 panic("couldn't fold constant");
 762                         }
 763                         tv_next = get_Const_tarval(cnst);
 764                 }
 765                 declaration->v.enum_val = tv_next;
 766                 tv_next = tarval_add(tv_next, one);
 767         }
 768
 769         constant_folding = constant_folding_old;
 770
 771         return ir_type_int;
 772 }
 773
 774 static ir_type *get_ir_type_incomplete(type_t *type)
 775 {
 776         assert(type != NULL);
 777         type = skip_typeref(type);
 778
 779         if (type->base.firm_type != NULL) {
 780                 assert(type->base.firm_type != INVALID_TYPE);
 781                 return type->base.firm_type;
 782         }
 783
 784         switch (type->kind) {
 785         case TYPE_COMPOUND_STRUCT:
 786                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 787                                             true, COMPOUND_IS_STRUCT);
 788         case TYPE_COMPOUND_UNION:
 789                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 790                                             true, COMPOUND_IS_UNION);
 791         default:
 792                 return get_ir_type(type);
 793         }
 794 }
 795
 796 static ir_type *get_ir_type(type_t *type)
 797 {
 798         assert(type != NULL);
 799
 800         type = skip_typeref(type);
 801
 802         if (type->base.firm_type != NULL) {
 803                 assert(type->base.firm_type != INVALID_TYPE);
 804                 return type->base.firm_type;
 805         }
 806
 807         ir_type *firm_type = NULL;
 808         switch (type->kind) {
 809         case TYPE_ERROR:
 810                 panic("error type occurred");
 811         case TYPE_ATOMIC:
 812                 firm_type = create_atomic_type(&type->atomic);
 813                 break;
 814         case TYPE_COMPLEX:
 815                 firm_type = create_complex_type(&type->complex);
 816                 break;
 817         case TYPE_IMAGINARY:
 818                 firm_type = create_imaginary_type(&type->imaginary);
 819                 break;
 820         case TYPE_FUNCTION:
 821                 firm_type = create_method_type(&type->function);
 822                 break;
 823         case TYPE_POINTER:
 824                 firm_type = create_pointer_type(&type->pointer);
 825                 break;
 826         case TYPE_ARRAY:
 827                 firm_type = create_array_type(&type->array);
 828                 break;
 829         case TYPE_COMPOUND_STRUCT:
 830                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 831                                                  false, COMPOUND_IS_STRUCT);
 832                 break;
 833         case TYPE_COMPOUND_UNION:
 834                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 835                                                  false, COMPOUND_IS_UNION);
 836                 break;
 837         case TYPE_ENUM:
 838                 firm_type = create_enum_type(&type->enumt);
 839                 break;
 840         case TYPE_BUILTIN:
 841                 firm_type = get_ir_type(type->builtin.real_type);
 842                 break;
 843         case TYPE_BITFIELD:
 844                 firm_type = create_bitfield_type(&type->bitfield);
 845                 break;
 846
 847         case TYPE_TYPEOF:
 848         case TYPE_TYPEDEF:
 849         case TYPE_INVALID:
 850                 break;
 851         }
 852         if (firm_type == NULL)
 853                 panic("unknown type found");
 854
 855         type->base.firm_type = firm_type;
 856         return firm_type;
 857 }
 858
 859 static inline ir_mode *get_ir_mode(type_t *type)
 860 {
 861         ir_type *irtype = get_ir_type(type);
 862
 863         /* firm doesn't report a mode for arrays somehow... */
 864         if (is_Array_type(irtype)) {
 865                 return mode_P_data;
 866         }
 867
 868         ir_mode *mode = get_type_mode(irtype);
 869         assert(mode != NULL);
 870         return mode;
 871 }
 872
 873 /** Names of the runtime functions. */
 874 static const struct {
 875         int        id;           /**< the rts id */
 876         int        n_res;        /**< number of return values */
 877         const char *name;        /**< the name of the rts function */
 878         int        n_params;     /**< number of parameters */
 879         unsigned   flags;        /**< language flags */
 880 } rts_data[] = {
 881         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 882         { rts_abort,      0, "abort",        0, _C89 },
 883         { rts_alloca,     1, "alloca",       1, _ALL },
 884         { rts_abs,        1, "abs",          1, _C89 },
 885         { rts_labs,       1, "labs",         1, _C89 },
 886         { rts_llabs,      1, "llabs",        1, _C99 },
 887         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 888
 889         { rts_fabs,       1, "fabs",         1, _C89 },
 890         { rts_sqrt,       1, "sqrt",         1, _C89 },
 891         { rts_cbrt,       1, "cbrt",         1, _C99 },
 892         { rts_exp,        1, "exp",          1, _C89 },
 893         { rts_exp2,       1, "exp2",         1, _C89 },
 894         { rts_exp10,      1, "exp10",        1, _GNUC },
 895         { rts_log,        1, "log",          1, _C89 },
 896         { rts_log2,       1, "log2",         1, _C89 },
 897         { rts_log10,      1, "log10",        1, _C89 },
 898         { rts_pow,        1, "pow",          2, _C89 },
 899         { rts_sin,        1, "sin",          1, _C89 },
 900         { rts_cos,        1, "cos",          1, _C89 },
 901         { rts_tan,        1, "tan",          1, _C89 },
 902         { rts_asin,       1, "asin",         1, _C89 },
 903         { rts_acos,       1, "acos",         1, _C89 },
 904         { rts_atan,       1, "atan",         1, _C89 },
 905         { rts_sinh,       1, "sinh",         1, _C89 },
 906         { rts_cosh,       1, "cosh",         1, _C89 },
 907         { rts_tanh,       1, "tanh",         1, _C89 },
 908
 909         { rts_fabsf,      1, "fabsf",        1, _C99 },
 910         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 911         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 912         { rts_expf,       1, "expf",         1, _C99 },
 913         { rts_exp2f,      1, "exp2f",        1, _C99 },
 914         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 915         { rts_logf,       1, "logf",         1, _C99 },
 916         { rts_log2f,      1, "log2f",        1, _C99 },
 917         { rts_log10f,     1, "log10f",       1, _C99 },
 918         { rts_powf,       1, "powf",         2, _C99 },
 919         { rts_sinf,       1, "sinf",         1, _C99 },
 920         { rts_cosf,       1, "cosf",         1, _C99 },
 921         { rts_tanf,       1, "tanf",         1, _C99 },
 922         { rts_asinf,      1, "asinf",        1, _C99 },
 923         { rts_acosf,      1, "acosf",        1, _C99 },
 924         { rts_atanf,      1, "atanf",        1, _C99 },
 925         { rts_sinhf,      1, "sinhf",        1, _C99 },
 926         { rts_coshf,      1, "coshf",        1, _C99 },
 927         { rts_tanhf,      1, "tanhf",        1, _C99 },
 928
 929         { rts_fabsl,      1, "fabsl",        1, _C99 },
 930         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 931         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 932         { rts_expl,       1, "expl",         1, _C99 },
 933         { rts_exp2l,      1, "exp2l",        1, _C99 },
 934         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 935         { rts_logl,       1, "logl",         1, _C99 },
 936         { rts_log2l,      1, "log2l",        1, _C99 },
 937         { rts_log10l,     1, "log10l",       1, _C99 },
 938         { rts_powl,       1, "powl",         2, _C99 },
 939         { rts_sinl,       1, "sinl",         1, _C99 },
 940         { rts_cosl,       1, "cosl",         1, _C99 },
 941         { rts_tanl,       1, "tanl",         1, _C99 },
 942         { rts_asinl,      1, "asinl",        1, _C99 },
 943         { rts_acosl,      1, "acosl",        1, _C99 },
 944         { rts_atanl,      1, "atanl",        1, _C99 },
 945         { rts_sinhl,      1, "sinhl",        1, _C99 },
 946         { rts_coshl,      1, "coshl",        1, _C99 },
 947         { rts_tanhl,      1, "tanhl",        1, _C99 },
 948
 949         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 950         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 951         { rts_strcmp,     1, "strcmp",       2, _C89 },
 952         { rts_strncmp,    1, "strncmp",      3, _C89 }
 953 };
 954
 955 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 956
 957 /**
 958  * Mangles an entity linker (ld) name for win32 usage.
 959  *
 960  * @param ent          the entity to be mangled
 961  * @param declaration  the declaration
 962  */
 963 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 964 {
 965         ident *id;
 966
 967         if (is_Method_type(get_entity_type(ent)))
 968                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 969         else {
 970                 /* always add an underscore in win32 */
 971                 id = mangle(id_underscore, get_entity_ident(ent));
 972         }
 973
 974         decl_modifiers_t decl_modifiers = declaration->modifiers;
 975         if (decl_modifiers & DM_DLLIMPORT) {
 976                 /* add prefix for imported symbols */
 977                 id = mangle(id_imp, id);
 978         }
 979         return id;
 980 }
 981
 982 /**
 983  * Mangles an entity linker (ld) name for Linux ELF usage.
 984  *
 985  * @param ent          the entity to be mangled
 986  * @param declaration  the declaration
 987  */
 988 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 989                                         declaration_t *declaration)
 990 {
 991         (void) declaration;
 992         return get_entity_ident(entity);
 993 }
 994
 995 /**
 996  * Mangles an entity linker (ld) name for Mach-O usage.
 997  *
 998  * @param ent          the entity to be mangled
 999  * @param declaration  the declaration
1000  */
1001 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1002 {
1003         (void) declaration;
1004         ident *id = mangle(id_underscore, get_entity_ident(ent));
1005         return id;
1006 }
1007
1008 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1009                                        declaration_t *declaration);
1010 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1011
1012 /**
1013  * Handle GNU attributes for entities
1014  *
1015  * @param ent   the entity
1016  * @param decl  the routine declaration
1017  */
1018 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1019 {
1020         if (decl->modifiers & DM_PURE) {
1021                 /* TRUE if the declaration includes the GNU
1022                    __attribute__((pure)) specifier. */
1023                 set_entity_additional_property(ent, mtp_property_pure);
1024         }
1025         if (decl->modifiers & DM_USED) {
1026                 /* TRUE if the declaration includes the GNU
1027                    __attribute__((used)) specifier. */
1028                 set_entity_stickyness(ent, stickyness_sticky);
1029         }
1030 }
1031
1032 /**
1033  * Creates an entity representing a function.
1034  *
1035  * @param declaration  the function declaration
1036  */
1037 static ir_entity *get_function_entity(declaration_t *declaration)
1038 {
1039         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
1040                 return declaration->v.entity;
1041         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1042
1043         symbol_t *symbol = declaration->symbol;
1044         ident    *id     = new_id_from_str(symbol->string);
1045
1046         ir_type  *global_type    = get_glob_type();
1047         ir_type  *ir_type_method = get_ir_type(declaration->type);
1048         assert(is_Method_type(ir_type_method));
1049
1050         /* already an entity defined? */
1051         ir_entity *entity = entitymap_get(&entitymap, symbol);
1052         if (entity != NULL) {
1053                 if (get_entity_visibility(entity) == visibility_external_allocated
1054                                 && declaration->init.statement != NULL) {
1055                         set_entity_visibility(entity, visibility_external_visible);
1056                 }
1057                 goto entity_created;
1058         }
1059
1060         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1061         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1062         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1063
1064         handle_gnu_attributes_ent(entity, declaration);
1065
1066         /* static inline             => local
1067          * extern inline             => local
1068          * inline without definition => local
1069          * inline with definition    => external_visible */
1070         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1071         bool                const is_inline     = declaration->is_inline;
1072         bool                const has_body      = declaration->init.statement != NULL;
1073         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1074                 set_entity_visibility(entity, visibility_external_visible);
1075         } else if (storage_class == STORAGE_CLASS_STATIC ||
1076                    (is_inline && has_body)) {
1077                 if (!has_body) {
1078                         /* this entity was declared, but is defined nowhere */
1079                         set_entity_peculiarity(entity, peculiarity_description);
1080                 }
1081                 set_entity_visibility(entity, visibility_local);
1082         } else if (has_body) {
1083                 set_entity_visibility(entity, visibility_external_visible);
1084         } else {
1085                 set_entity_visibility(entity, visibility_external_allocated);
1086         }
1087         set_entity_allocation(entity, allocation_static);
1088
1089         /* We should check for file scope here, but as long as we compile C only
1090            this is not needed. */
1091         if (! firm_opt.freestanding) {
1092                 /* check for a known runtime function */
1093                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1094                         if (id != rts_idents[i])
1095                                 continue;
1096
1097                         /* ignore those rts functions not necessary needed for current mode */
1098                         if ((c_mode & rts_data[i].flags) == 0)
1099                                 continue;
1100                         assert(rts_entities[rts_data[i].id] == NULL);
1101                         rts_entities[rts_data[i].id] = entity;
1102                 }
1103         }
1104
1105         entitymap_insert(&entitymap, symbol, entity);
1106
1107 entity_created:
1108         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1109         declaration->v.entity         = entity;
1110
1111         return entity;
1112 }
1113
1114 /**
1115  * Creates a Const node representing a constant.
1116  */
1117 static ir_node *const_to_firm(const const_expression_t *cnst)
1118 {
1119         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1120         ir_mode  *mode = get_ir_mode(cnst->base.type);
1121
1122         char    buf[128];
1123         tarval *tv;
1124         size_t  len;
1125         if (mode_is_float(mode)) {
1126                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1127         } else {
1128                 if (mode_is_signed(mode)) {
1129                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1130                 } else {
1131                         len = snprintf(buf, sizeof(buf), "%llu",
1132                                        (unsigned long long) cnst->v.int_value);
1133                 }
1134                 tv = new_tarval_from_str(buf, len, mode);
1135         }
1136
1137         return new_d_Const(dbgi, mode, tv);
1138 }
1139
1140 /**
1141  * Creates a Const node representing a character constant.
1142  */
1143 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1144 {
1145         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1146         ir_mode  *mode = get_ir_mode(cnst->base.type);
1147
1148         long long int v = 0;
1149         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1150                 if (char_is_signed) {
1151                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1152                 } else {
1153                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1154                 }
1155         }
1156         char    buf[128];
1157         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1158         tarval *tv = new_tarval_from_str(buf, len, mode);
1159
1160         return new_d_Const(dbgi, mode, tv);
1161 }
1162
1163 /**
1164  * Creates a Const node representing a wide character constant.
1165  */
1166 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1167 {
1168         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1169         ir_mode  *mode = get_ir_mode(cnst->base.type);
1170
1171         long long int v = cnst->v.wide_character.begin[0];
1172
1173         char    buf[128];
1174         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1175         tarval *tv = new_tarval_from_str(buf, len, mode);
1176
1177         return new_d_Const(dbgi, mode, tv);
1178 }
1179
1180 /**
1181  * Creates a SymConst for a given entity.
1182  *
1183  * @param dbgi    debug info
1184  * @param mode    the (reference) mode for the SymConst
1185  * @param entity  the entity
1186  */
1187 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1188                               ir_entity *entity)
1189 {
1190         assert(entity != NULL);
1191         union symconst_symbol sym;
1192         sym.entity_p = entity;
1193         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1194 }
1195
1196 /**
1197  * Creates a SymConst node representing a string constant.
1198  *
1199  * @param src_pos    the source position of the string constant
1200  * @param id_prefix  a prefix for the name of the generated string constant
1201  * @param value      the value of the string constant
1202  */
1203 static ir_node *string_to_firm(const source_position_t *const src_pos,
1204                                const char *const id_prefix,
1205                                const string_t *const value)
1206 {
1207         ir_type  *const global_type = get_glob_type();
1208         dbg_info *const dbgi        = get_dbg_info(src_pos);
1209         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1210                                                        ir_type_const_char, dbgi);
1211
1212         ident     *const id     = id_unique(id_prefix);
1213         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1214         set_entity_ld_ident(entity, id);
1215         set_entity_variability(entity, variability_constant);
1216         set_entity_allocation(entity, allocation_static);
1217
1218         ir_type *const elem_type = ir_type_const_char;
1219         ir_mode *const mode      = get_type_mode(elem_type);
1220
1221         const char* const string = value->begin;
1222         const size_t      slen   = value->size;
1223
1224         set_array_lower_bound_int(type, 0, 0);
1225         set_array_upper_bound_int(type, 0, slen);
1226         set_type_size_bytes(type, slen);
1227         set_type_state(type, layout_fixed);
1228
1229         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1230         for(size_t i = 0; i < slen; ++i) {
1231                 tvs[i] = new_tarval_from_long(string[i], mode);
1232         }
1233
1234         set_array_entity_values(entity, tvs, slen);
1235         free(tvs);
1236
1237         return create_symconst(dbgi, mode_P_data, entity);
1238 }
1239
1240 /**
1241  * Creates a SymConst node representing a string literal.
1242  *
1243  * @param literal   the string literal
1244  */
1245 static ir_node *string_literal_to_firm(
1246                 const string_literal_expression_t* literal)
1247 {
1248         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1249                               &literal->value);
1250 }
1251
1252 /**
1253  * Creates a SymConst node representing a wide string literal.
1254  *
1255  * @param literal   the wide string literal
1256  */
1257 static ir_node *wide_string_literal_to_firm(
1258         const wide_string_literal_expression_t* const literal)
1259 {
1260         ir_type *const global_type = get_glob_type();
1261         ir_type *const elem_type   = ir_type_wchar_t;
1262         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1263         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1264                                                     elem_type, dbgi);
1265
1266         ident     *const id     = id_unique("Lstr.%u");
1267         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1268         set_entity_ld_ident(entity, id);
1269         set_entity_variability(entity, variability_constant);
1270         set_entity_allocation(entity, allocation_static);
1271
1272         ir_mode *const mode      = get_type_mode(elem_type);
1273
1274         const wchar_rep_t *const string = literal->value.begin;
1275         const size_t             slen   = literal->value.size;
1276
1277         set_array_lower_bound_int(type, 0, 0);
1278         set_array_upper_bound_int(type, 0, slen);
1279         set_type_size_bytes(type, slen);
1280         set_type_state(type, layout_fixed);
1281
1282         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1283         for(size_t i = 0; i < slen; ++i) {
1284                 tvs[i] = new_tarval_from_long(string[i], mode);
1285         }
1286
1287         set_array_entity_values(entity, tvs, slen);
1288         free(tvs);
1289
1290         return create_symconst(dbgi, mode_P_data, entity);
1291 }
1292
1293 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1294                                       ir_node *const addr)
1295 {
1296         ir_type *irtype = get_ir_type(type);
1297         if (is_compound_type(irtype)
1298                         || is_Method_type(irtype)
1299                         || is_Array_type(irtype)) {
1300                 return addr;
1301         }
1302
1303         ir_mode *const mode     = get_type_mode(irtype);
1304         ir_node *const memory   = get_store();
1305         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1306         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1307         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1308
1309         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1310                 set_Load_volatility(load, volatility_is_volatile);
1311         }
1312
1313         set_store(load_mem);
1314         return load_res;
1315 }
1316
1317 /**
1318  * Creates a strict Conv if neccessary.
1319  */
1320 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1321 {
1322         ir_mode *mode = get_irn_mode(node);
1323
1324         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1325                 return node;
1326         if (!mode_is_float(mode))
1327                 return node;
1328
1329         /* check if there is already a Conv */
1330         if (is_Conv(node)) {
1331                 /* convert it into a strict Conv */
1332                 set_Conv_strict(node, 1);
1333                 return node;
1334         }
1335
1336         /* otherwise create a new one */
1337         return new_d_strictConv(dbgi, node, mode);
1338 }
1339
1340 static ir_node *get_global_var_address(dbg_info *const dbgi,
1341                                        const declaration_t *const decl)
1342 {
1343         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1344
1345         ir_entity *const entity = decl->v.entity;
1346         switch ((storage_class_tag_t)decl->storage_class) {
1347                 case STORAGE_CLASS_THREAD:
1348                 case STORAGE_CLASS_THREAD_EXTERN:
1349                 case STORAGE_CLASS_THREAD_STATIC: {
1350                         ir_node *const no_mem = new_NoMem();
1351                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1352                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1353                 }
1354
1355                 default:
1356                         return create_symconst(dbgi, mode_P_data, entity);
1357         }
1358 }
1359
1360 /**
1361  * Returns the correct base address depending on whether it is a parameter or a
1362  * normal local variable.
1363  */
1364 static ir_node *get_local_frame(ir_entity *const ent)
1365 {
1366         ir_graph      *const irg   = current_ir_graph;
1367         const ir_type *const owner = get_entity_owner(ent);
1368         if (owner == get_irg_frame_type(irg)) {
1369                 return get_irg_frame(irg);
1370         } else {
1371                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1372                 return get_irg_value_param_base(irg);
1373         }
1374 }
1375
1376 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1377 {
1378         ir_mode *value_mode = get_irn_mode(value);
1379
1380         if (value_mode == dest_mode || is_Bad(value))
1381                 return value;
1382
1383         if (dest_mode == mode_b) {
1384                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1385                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1386                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1387                 return proj;
1388         }
1389
1390         return new_d_Conv(dbgi, value, dest_mode);
1391 }
1392
1393 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1394 {
1395         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1396         declaration_t *declaration = ref->declaration;
1397         type_t        *type        = skip_typeref(declaration->type);
1398
1399         /* make sure the type is constructed */
1400         (void) get_ir_type(type);
1401
1402         switch((declaration_kind_t) declaration->declaration_kind) {
1403         case DECLARATION_KIND_TYPE:
1404         case DECLARATION_KIND_UNKNOWN:
1405                 break;
1406
1407         case DECLARATION_KIND_ENUM_ENTRY: {
1408                 ir_mode *const mode = get_ir_mode(type);
1409                 return new_Const(mode, declaration->v.enum_val);
1410         }
1411
1412         case DECLARATION_KIND_LOCAL_VARIABLE: {
1413                 ir_mode *const mode = get_ir_mode(type);
1414                 return get_value(declaration->v.value_number, mode);
1415         }
1416         case DECLARATION_KIND_FUNCTION: {
1417                 ir_mode *const mode = get_ir_mode(type);
1418                 return create_symconst(dbgi, mode, declaration->v.entity);
1419         }
1420         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1421                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1422                 return deref_address(dbgi, declaration->type, addr);
1423         }
1424
1425         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1426                 ir_entity *entity = declaration->v.entity;
1427                 ir_node   *frame  = get_local_frame(entity);
1428                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1429                 return deref_address(dbgi, declaration->type, sel);
1430         }
1431
1432         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1433                 return declaration->v.vla_base;
1434
1435         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1436         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1437         case DECLARATION_KIND_COMPOUND_MEMBER:
1438         case DECLARATION_KIND_LABEL_BLOCK:
1439                 panic("not implemented reference type");
1440         }
1441
1442         panic("reference to declaration with unknown type found");
1443 }
1444
1445 static ir_node *reference_addr(const reference_expression_t *ref)
1446 {
1447         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1448         declaration_t *declaration = ref->declaration;
1449
1450         switch((declaration_kind_t) declaration->declaration_kind) {
1451         case DECLARATION_KIND_TYPE:
1452         case DECLARATION_KIND_UNKNOWN:
1453                 break;
1454         case DECLARATION_KIND_LOCAL_VARIABLE:
1455                 /* you can store to a local variable (so we don't panic but return NULL
1456                  * as an indicator for no real address) */
1457                 return NULL;
1458         case DECLARATION_KIND_FUNCTION: {
1459                 type_t *const  type = skip_typeref(ref->base.type);
1460                 ir_mode *const mode = get_ir_mode(type);
1461                 return create_symconst(dbgi, mode, declaration->v.entity);
1462         }
1463         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1464                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1465                 return addr;
1466         }
1467         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1468                 ir_entity *entity = declaration->v.entity;
1469                 ir_node   *frame  = get_local_frame(entity);
1470                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1471
1472                 return sel;
1473         }
1474
1475         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1476                 return declaration->v.vla_base;
1477
1478         case DECLARATION_KIND_ENUM_ENTRY:
1479                 panic("trying to reference enum entry");
1480
1481         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1482         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1483         case DECLARATION_KIND_COMPOUND_MEMBER:
1484         case DECLARATION_KIND_LABEL_BLOCK:
1485                 panic("not implemented reference type");
1486         }
1487
1488         panic("reference to declaration with unknown type found");
1489 }
1490
1491 /**
1492  * Transform calls to builtin functions.
1493  */
1494 static ir_node *process_builtin_call(const call_expression_t *call)
1495 {
1496         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1497
1498         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1499         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1500
1501         type_t *type = skip_typeref(builtin->base.type);
1502         assert(is_type_pointer(type));
1503
1504         type_t   *function_type = skip_typeref(type->pointer.points_to);
1505         symbol_t *symbol        = builtin->symbol;
1506
1507         switch(symbol->ID) {
1508         case T___builtin_alloca: {
1509                 if (call->arguments == NULL || call->arguments->next != NULL) {
1510                         panic("invalid number of parameters on __builtin_alloca");
1511                 }
1512                 expression_t *argument = call->arguments->expression;
1513                 ir_node      *size     = expression_to_firm(argument);
1514
1515                 ir_node *store  = get_store();
1516                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1517                                               stack_alloc);
1518                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1519                 set_store(proj_m);
1520                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1521
1522                 return res;
1523         }
1524         case T___builtin_huge_val: {
1525                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1526                 tarval  *tv   = get_mode_infinite(mode);
1527                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1528                 return   res;
1529         }
1530         case T___builtin_nan:
1531         case T___builtin_nanf:
1532         case T___builtin_nand: {
1533                 /* Ignore string for now... */
1534                 assert(is_type_function(function_type));
1535                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1536                 tarval  *tv   = get_mode_NAN(mode);
1537                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1538                 return res;
1539         }
1540         case T___builtin_va_end:
1541                 return NULL;
1542         default:
1543                 panic("Unsupported builtin found\n");
1544         }
1545 }
1546
1547 /**
1548  * Transform a call expression.
1549  * Handles some special cases, like alloca() calls, which must be resolved
1550  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1551  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1552  * handled right...
1553  */
1554 static ir_node *call_expression_to_firm(const call_expression_t *call)
1555 {
1556         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1557         assert(get_cur_block() != NULL);
1558
1559         expression_t *function = call->function;
1560         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1561                 return process_builtin_call(call);
1562         }
1563         if (function->kind == EXPR_REFERENCE) {
1564                 const reference_expression_t *ref = &function->reference;
1565                 declaration_t *declaration = ref->declaration;
1566
1567                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1568                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1569                                 /* handle alloca() call */
1570                                 expression_t *argument = call->arguments->expression;
1571                                 ir_node      *size     = expression_to_firm(argument);
1572
1573                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1574
1575                                 ir_node *store  = get_store();
1576                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1577                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1578                                               stack_alloc);
1579                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1580                                 set_store(proj_m);
1581                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1582
1583                                 return res;
1584                         }
1585                 }
1586         }
1587         ir_node *callee = expression_to_firm(function);
1588
1589         type_t *type = skip_typeref(function->base.type);
1590         assert(is_type_pointer(type));
1591         pointer_type_t *pointer_type = &type->pointer;
1592         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1593         assert(is_type_function(points_to));
1594         function_type_t *function_type = &points_to->function;
1595
1596         int      n_parameters = 0;
1597         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1598         ir_type *new_method_type = NULL;
1599         if (function_type->variadic || function_type->unspecified_parameters) {
1600                 const call_argument_t *argument = call->arguments;
1601                 for( ; argument != NULL; argument = argument->next) {
1602                         ++n_parameters;
1603                 }
1604
1605                 /* we need to construct a new method type matching the call
1606                  * arguments... */
1607                 int n_res       = get_method_n_ress(ir_method_type);
1608                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1609                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1610                                                     n_parameters, n_res, dbgi);
1611                 set_method_calling_convention(new_method_type,
1612                                get_method_calling_convention(ir_method_type));
1613                 set_method_additional_properties(new_method_type,
1614                                get_method_additional_properties(ir_method_type));
1615                 set_method_variadicity(new_method_type,
1616                                        get_method_variadicity(ir_method_type));
1617
1618                 for(int i = 0; i < n_res; ++i) {
1619                         set_method_res_type(new_method_type, i,
1620                                             get_method_res_type(ir_method_type, i));
1621                 }
1622                 argument = call->arguments;
1623                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1624                         expression_t *expression = argument->expression;
1625                         ir_type      *irtype     = get_ir_type(expression->base.type);
1626                         set_method_param_type(new_method_type, i, irtype);
1627                 }
1628                 ir_method_type = new_method_type;
1629         } else {
1630                 n_parameters = get_method_n_params(ir_method_type);
1631         }
1632
1633         ir_node *in[n_parameters];
1634
1635         const call_argument_t *argument = call->arguments;
1636         for(int n = 0; n < n_parameters; ++n) {
1637                 expression_t *expression = argument->expression;
1638                 ir_node      *arg_node   = expression_to_firm(expression);
1639
1640                 arg_node = do_strict_conv(dbgi, arg_node);
1641
1642                 in[n] = arg_node;
1643
1644                 argument = argument->next;
1645         }
1646
1647         ir_node  *store = get_store();
1648         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1649                                      ir_method_type);
1650         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1651         set_store(mem);
1652
1653         type_t  *return_type = skip_typeref(function_type->return_type);
1654         ir_node *result      = NULL;
1655
1656         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1657                 ir_mode *mode;
1658                 if (is_type_scalar(return_type)) {
1659                         mode = get_ir_mode(return_type);
1660                 } else {
1661                         mode = mode_P_data;
1662                 }
1663                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1664                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1665         }
1666
1667         return result;
1668 }
1669
1670 static void statement_to_firm(statement_t *statement);
1671 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1672
1673 static ir_node *expression_to_addr(const expression_t *expression);
1674 static void create_condition_evaluation(const expression_t *expression,
1675                                         ir_node *true_block,
1676                                         ir_node *false_block);
1677
1678 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1679                          ir_node *value)
1680 {
1681         value = do_strict_conv(dbgi, value);
1682
1683         ir_node *memory = get_store();
1684
1685         if (is_type_scalar(type)) {
1686                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1687                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1688                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1689                         set_Store_volatility(store, volatility_is_volatile);
1690                 set_store(store_mem);
1691         } else {
1692                 ir_type *irtype    = get_ir_type(type);
1693                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1694                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1695                 set_store(copyb_mem);
1696         }
1697 }
1698
1699 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1700 {
1701         tarval *all_one   = get_mode_all_one(mode);
1702         int     mode_size = get_mode_size_bits(mode);
1703
1704         assert(offset >= 0);
1705         assert(size   >= 0);
1706         assert(offset + size <= mode_size);
1707         if (size == mode_size) {
1708                 return all_one;
1709         }
1710
1711         long    shiftr    = get_mode_size_bits(mode) - size;
1712         long    shiftl    = offset;
1713         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1714         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1715         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1716         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1717
1718         return mask1;
1719 }
1720
1721 static void bitfield_store_to_firm(const select_expression_t *expression,
1722                                    ir_node *addr, ir_node *value)
1723 {
1724         type_t       *type   = expression->base.type;
1725         ir_mode      *mode   = get_ir_mode(type);
1726
1727         assert(get_irn_mode(value) == mode || is_Bad(value));
1728
1729         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1730
1731         /* kill upper bits of value and shift to right position */
1732         ir_entity *entity       = expression->compound_entry->v.entity;
1733         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1734         ir_type   *entity_type  = get_entity_type(entity);
1735         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1736
1737         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1738         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1739         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1740         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1741         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1742         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1743
1744         /* load current value */
1745         ir_node  *mem             = get_store();
1746         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1747         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1748         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1749         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1750         tarval   *inv_mask        = tarval_not(shift_mask);
1751         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1752         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1753
1754         /* construct new value and store */
1755         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1756         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1757         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1758         set_store(store_mem);
1759
1760         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1761                 set_Load_volatility(load, volatility_is_volatile);
1762                 set_Store_volatility(store, volatility_is_volatile);
1763         }
1764 }
1765
1766 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1767                 ir_node *addr)
1768 {
1769         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1770         type_t   *type     = expression->base.type;
1771         ir_mode  *mode     = get_ir_mode(type);
1772         ir_node  *mem      = get_store();
1773         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1774         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1775         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1776
1777         load_res           = create_conv(dbgi, load_res, mode_int);
1778
1779         set_store(load_mem);
1780
1781         /* kill upper bits */
1782         ir_entity *entity       = expression->compound_entry->v.entity;
1783         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1784         ir_type   *entity_type  = get_entity_type(entity);
1785         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1786         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1787         assert(shift_bitsl >= 0);
1788         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1789         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1790         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1791
1792         long       shift_bitsr  = bitoffset + shift_bitsl;
1793         assert(shift_bitsr <= (long) machine_size);
1794         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1795         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1796         ir_node   *shiftr;
1797         if (mode_is_signed(mode)) {
1798                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1799         } else {
1800                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1801         }
1802
1803         return create_conv(dbgi, shiftr, mode);
1804 }
1805
1806 static void set_value_for_expression_addr(const expression_t *expression,
1807                                           ir_node *value, ir_node *addr)
1808 {
1809         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1810         value          = do_strict_conv(dbgi, value);
1811
1812         if (expression->kind == EXPR_REFERENCE) {
1813                 const reference_expression_t *ref = &expression->reference;
1814
1815                 declaration_t *declaration = ref->declaration;
1816                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1817                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1818                         set_value(declaration->v.value_number, value);
1819                         return;
1820                 }
1821         }
1822
1823         if (addr == NULL)
1824                 addr = expression_to_addr(expression);
1825
1826         type_t *type = skip_typeref(expression->base.type);
1827
1828         if (expression->kind == EXPR_SELECT) {
1829                 const select_expression_t *select = &expression->select;
1830
1831                 declaration_t *declaration = select->compound_entry;
1832                 if (declaration->type->kind == TYPE_BITFIELD) {
1833                         bitfield_store_to_firm(select, addr, value);
1834                         return;
1835                 }
1836         }
1837
1838         assign_value(dbgi, addr, type, value);
1839 }
1840
1841 static void set_value_for_expression(const expression_t *expression,
1842                                      ir_node *value)
1843 {
1844         set_value_for_expression_addr(expression, value, NULL);
1845 }
1846
1847 static ir_node *get_value_from_lvalue(const expression_t *expression,
1848                                       ir_node *addr)
1849 {
1850         if (expression->kind == EXPR_REFERENCE) {
1851                 const reference_expression_t *ref = &expression->reference;
1852
1853                 declaration_t *declaration = ref->declaration;
1854                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1855                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1856                         assert(addr == NULL);
1857                         ir_mode *mode = get_ir_mode(expression->base.type);
1858                         return get_value(declaration->v.value_number, mode);
1859                 }
1860         }
1861
1862         assert(addr != NULL);
1863         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1864
1865         ir_node *value;
1866         if (expression->kind == EXPR_SELECT &&
1867             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1868                 value = bitfield_extract_to_firm(&expression->select, addr);
1869         } else {
1870                 value = deref_address(dbgi, expression->base.type, addr);
1871         }
1872
1873         return value;
1874 }
1875
1876
1877 static ir_node *create_incdec(const unary_expression_t *expression)
1878 {
1879         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1880         const expression_t *value_expr = expression->value;
1881         ir_node            *addr       = expression_to_addr(value_expr);
1882         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1883
1884         type_t  *type = skip_typeref(expression->base.type);
1885         ir_mode *mode = get_ir_mode(expression->base.type);
1886
1887         ir_node *offset;
1888         if (is_type_pointer(type)) {
1889                 pointer_type_t *pointer_type = &type->pointer;
1890                 offset                       = get_type_size(pointer_type->points_to);
1891         } else {
1892                 assert(is_type_arithmetic(type));
1893                 offset = new_Const(mode, get_mode_one(mode));
1894         }
1895
1896         ir_node *result;
1897         ir_node *store_value;
1898         switch(expression->base.kind) {
1899         case EXPR_UNARY_POSTFIX_INCREMENT:
1900                 result      = value;
1901                 store_value = new_d_Add(dbgi, value, offset, mode);
1902                 break;
1903         case EXPR_UNARY_POSTFIX_DECREMENT:
1904                 result      = value;
1905                 store_value = new_d_Sub(dbgi, value, offset, mode);
1906                 break;
1907         case EXPR_UNARY_PREFIX_INCREMENT:
1908                 result      = new_d_Add(dbgi, value, offset, mode);
1909                 store_value = result;
1910                 break;
1911         case EXPR_UNARY_PREFIX_DECREMENT:
1912                 result      = new_d_Sub(dbgi, value, offset, mode);
1913                 store_value = result;
1914                 break;
1915         default:
1916                 panic("no incdec expr in create_incdec");
1917         }
1918
1919         set_value_for_expression_addr(value_expr, store_value, addr);
1920
1921         return result;
1922 }
1923
1924 static bool is_local_variable(expression_t *expression)
1925 {
1926         if (expression->kind != EXPR_REFERENCE)
1927                 return false;
1928         reference_expression_t *ref_expr    = &expression->reference;
1929         declaration_t          *declaration = ref_expr->declaration;
1930         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1931 }
1932
1933 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1934 {
1935         switch(kind) {
1936         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1937         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1938         case EXPR_BINARY_NOTEQUAL:
1939                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1940         case EXPR_BINARY_ISLESS:
1941         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1942         case EXPR_BINARY_ISLESSEQUAL:
1943         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1944         case EXPR_BINARY_ISGREATER:
1945         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1946         case EXPR_BINARY_ISGREATEREQUAL:
1947         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1948         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1949
1950         default:
1951                 break;
1952         }
1953         panic("trying to get pn_Cmp from non-comparison binexpr type");
1954 }
1955
1956 /**
1957  * Handle the assume optimizer hint: check if a Confirm
1958  * node can be created.
1959  *
1960  * @param dbi    debug info
1961  * @param expr   the IL assume expression
1962  *
1963  * we support here only some simple cases:
1964  *  - var rel const
1965  *  - const rel val
1966  *  - var rel var
1967  */
1968 static ir_node *handle_assume_compare(dbg_info *dbi,
1969                                       const binary_expression_t *expression)
1970 {
1971         expression_t  *op1 = expression->left;
1972         expression_t  *op2 = expression->right;
1973         declaration_t *var2, *var = NULL;
1974         ir_node       *res = NULL;
1975         pn_Cmp         cmp_val;
1976
1977         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1978
1979         if (is_local_variable(op1) && is_local_variable(op2)) {
1980         var  = op1->reference.declaration;
1981             var2 = op2->reference.declaration;
1982
1983                 type_t  *const type = skip_typeref(var->type);
1984                 ir_mode *const mode = get_ir_mode(type);
1985
1986                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1987                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1988
1989                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1990                 set_value(var2->v.value_number, res);
1991
1992                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1993                 set_value(var->v.value_number, res);
1994
1995                 return res;
1996         }
1997
1998         expression_t *con;
1999         if (is_local_variable(op1) && is_constant_expression(op2)) {
2000                 var = op1->reference.declaration;
2001                 con = op2;
2002         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2003                 cmp_val = get_inversed_pnc(cmp_val);
2004                 var = op2->reference.declaration;
2005                 con = op1;
2006         }
2007
2008         if (var != NULL) {
2009                 type_t  *const type = skip_typeref(var->type);
2010                 ir_mode *const mode = get_ir_mode(type);
2011
2012                 res = get_value(var->v.value_number, mode);
2013                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2014                 set_value(var->v.value_number, res);
2015         }
2016         return res;
2017 }
2018
2019 /**
2020  * Handle the assume optimizer hint.
2021  *
2022  * @param dbi    debug info
2023  * @param expr   the IL assume expression
2024  */
2025 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2026         switch(expression->kind) {
2027         case EXPR_BINARY_EQUAL:
2028         case EXPR_BINARY_NOTEQUAL:
2029         case EXPR_BINARY_LESS:
2030         case EXPR_BINARY_LESSEQUAL:
2031         case EXPR_BINARY_GREATER:
2032         case EXPR_BINARY_GREATEREQUAL:
2033                 return handle_assume_compare(dbi, &expression->binary);
2034         default:
2035                 return NULL;
2036         }
2037 }
2038
2039 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2040 {
2041         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2042         type_t   *type = skip_typeref(expression->base.type);
2043
2044         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2045                 return expression_to_addr(expression->value);
2046
2047         const expression_t *value = expression->value;
2048
2049         switch(expression->base.kind) {
2050         case EXPR_UNARY_NEGATE: {
2051                 ir_node *value_node = expression_to_firm(value);
2052                 ir_mode *mode = get_ir_mode(type);
2053                 return new_d_Minus(dbgi, value_node, mode);
2054         }
2055         case EXPR_UNARY_PLUS:
2056                 return expression_to_firm(value);
2057         case EXPR_UNARY_BITWISE_NEGATE: {
2058                 ir_node *value_node = expression_to_firm(value);
2059                 ir_mode *mode = get_ir_mode(type);
2060                 return new_d_Not(dbgi, value_node, mode);
2061         }
2062         case EXPR_UNARY_NOT: {
2063                 ir_node *value_node = _expression_to_firm(value);
2064                 value_node          = create_conv(dbgi, value_node, mode_b);
2065                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2066                 return res;
2067         }
2068         case EXPR_UNARY_DEREFERENCE: {
2069                 ir_node *value_node = expression_to_firm(value);
2070                 type_t  *value_type = skip_typeref(value->base.type);
2071                 assert(is_type_pointer(value_type));
2072                 type_t  *points_to  = value_type->pointer.points_to;
2073                 return deref_address(dbgi, points_to, value_node);
2074         }
2075         case EXPR_UNARY_POSTFIX_INCREMENT:
2076         case EXPR_UNARY_POSTFIX_DECREMENT:
2077         case EXPR_UNARY_PREFIX_INCREMENT:
2078         case EXPR_UNARY_PREFIX_DECREMENT:
2079                 return create_incdec(expression);
2080         case EXPR_UNARY_CAST: {
2081                 ir_node *value_node = expression_to_firm(value);
2082                 if (is_type_scalar(type)) {
2083                         ir_mode *mode = get_ir_mode(type);
2084                         ir_node *node = create_conv(dbgi, value_node, mode);
2085                         node = do_strict_conv(dbgi, node);
2086                         return node;
2087                 } else {
2088                         /* make sure firm type is constructed */
2089                         (void) get_ir_type(type);
2090                         return value_node;
2091                 }
2092         }
2093         case EXPR_UNARY_CAST_IMPLICIT: {
2094                 ir_node *value_node = expression_to_firm(value);
2095                 if (is_type_scalar(type)) {
2096                         ir_mode *mode = get_ir_mode(type);
2097                         return create_conv(dbgi, value_node, mode);
2098                 } else {
2099                         return value_node;
2100                 }
2101         }
2102         case EXPR_UNARY_ASSUME:
2103                 if (firm_opt.confirm)
2104                         return handle_assume(dbgi, value);
2105                 else
2106                         return NULL;
2107
2108         default:
2109                 break;
2110         }
2111         panic("invalid UNEXPR type found");
2112 }
2113
2114 /**
2115  * produces a 0/1 depending of the value of a mode_b node
2116  */
2117 static ir_node *produce_condition_result(const expression_t *expression,
2118                                          dbg_info *dbgi)
2119 {
2120         ir_mode *mode      = get_ir_mode(expression->base.type);
2121         ir_node *cur_block = get_cur_block();
2122
2123         ir_node *one_block = new_immBlock();
2124         ir_node *one       = new_Const(mode, get_mode_one(mode));
2125         ir_node *jmp_one   = new_d_Jmp(dbgi);
2126
2127         ir_node *zero_block = new_immBlock();
2128         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2129         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2130
2131         set_cur_block(cur_block);
2132         create_condition_evaluation(expression, one_block, zero_block);
2133         mature_immBlock(one_block);
2134         mature_immBlock(zero_block);
2135
2136         ir_node *common_block = new_immBlock();
2137         add_immBlock_pred(common_block, jmp_one);
2138         add_immBlock_pred(common_block, jmp_zero);
2139         mature_immBlock(common_block);
2140
2141         ir_node *in[2] = { one, zero };
2142         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2143
2144         return val;
2145 }
2146
2147 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2148                 ir_node *value, type_t *type)
2149 {
2150         pointer_type_t *const pointer_type = &type->pointer;
2151         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2152         unsigned              elem_size    = get_type_size_const(points_to);
2153
2154         /* gcc extension: allow arithmetic with void * and function * */
2155         if (elem_size == 0 &&
2156             (is_type_atomic(points_to, ATOMIC_TYPE_VOID) ||
2157              is_type_function(points_to)))  {
2158                 elem_size = 1;
2159         }
2160
2161         assert(elem_size >= 1);
2162         if (elem_size == 1)
2163                 return value;
2164
2165         value = create_conv(dbgi, value, mode_int);
2166         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2167         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2168         return mul;
2169 }
2170
2171 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2172                           ir_node *left, ir_node *right)
2173 {
2174         ir_mode  *mode;
2175         type_t   *type_left  = skip_typeref(expression->left->base.type);
2176         type_t   *type_right = skip_typeref(expression->right->base.type);
2177
2178         expression_kind_t kind = expression->base.kind;
2179
2180         switch (kind) {
2181         case EXPR_BINARY_SHIFTLEFT:
2182         case EXPR_BINARY_SHIFTRIGHT:
2183         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2184         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2185                 mode  = get_irn_mode(left);
2186                 right = create_conv(dbgi, right, mode_uint);
2187                 break;
2188
2189         case EXPR_BINARY_SUB:
2190                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2191                         const pointer_type_t *const ptr_type = &type_left->pointer;
2192
2193                         mode = get_ir_mode(expression->base.type);
2194                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2195                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2196                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2197                         ir_node *const no_mem    = new_NoMem();
2198                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2199                                                                                                    mode, op_pin_state_floats);
2200                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2201                 }
2202                 /* fallthrough */
2203         case EXPR_BINARY_SUB_ASSIGN:
2204                 if (is_type_pointer(type_left)) {
2205                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2206                         mode  = get_ir_mode(type_left);
2207                         break;
2208                 }
2209                 goto normal_node;
2210
2211         case EXPR_BINARY_ADD:
2212         case EXPR_BINARY_ADD_ASSIGN:
2213                 if (is_type_pointer(type_left)) {
2214                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2215                         mode  = get_ir_mode(type_left);
2216                         break;
2217                 } else if (is_type_pointer(type_right)) {
2218                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2219                         mode  = get_ir_mode(type_right);
2220                         break;
2221                 }
2222                 goto normal_node;
2223
2224         default:
2225 normal_node:
2226                 mode = get_irn_mode(right);
2227                 left = create_conv(dbgi, left, mode);
2228                 break;
2229         }
2230
2231         switch (kind) {
2232         case EXPR_BINARY_ADD_ASSIGN:
2233         case EXPR_BINARY_ADD:
2234                 return new_d_Add(dbgi, left, right, mode);
2235         case EXPR_BINARY_SUB_ASSIGN:
2236         case EXPR_BINARY_SUB:
2237                 return new_d_Sub(dbgi, left, right, mode);
2238         case EXPR_BINARY_MUL_ASSIGN:
2239         case EXPR_BINARY_MUL:
2240                 return new_d_Mul(dbgi, left, right, mode);
2241         case EXPR_BINARY_BITWISE_AND:
2242         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2243                 return new_d_And(dbgi, left, right, mode);
2244         case EXPR_BINARY_BITWISE_OR:
2245         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2246                 return new_d_Or(dbgi, left, right, mode);
2247         case EXPR_BINARY_BITWISE_XOR:
2248         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2249                 return new_d_Eor(dbgi, left, right, mode);
2250         case EXPR_BINARY_SHIFTLEFT:
2251         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2252                 return new_d_Shl(dbgi, left, right, mode);
2253         case EXPR_BINARY_SHIFTRIGHT:
2254         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2255                 if (mode_is_signed(mode)) {
2256                         return new_d_Shrs(dbgi, left, right, mode);
2257                 } else {
2258                         return new_d_Shr(dbgi, left, right, mode);
2259                 }
2260         case EXPR_BINARY_DIV:
2261         case EXPR_BINARY_DIV_ASSIGN: {
2262                 ir_node *pin = new_Pin(new_NoMem());
2263                 ir_node *op;
2264                 ir_node *res;
2265                 if (mode_is_float(mode)) {
2266                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2267                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2268                 } else {
2269                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2270                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2271                 }
2272                 return res;
2273         }
2274         case EXPR_BINARY_MOD:
2275         case EXPR_BINARY_MOD_ASSIGN: {
2276                 ir_node *pin = new_Pin(new_NoMem());
2277                 assert(!mode_is_float(mode));
2278                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2279                                          op_pin_state_floats);
2280                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2281                 return res;
2282         }
2283         default:
2284                 panic("unexpected expression kind");
2285         }
2286 }
2287
2288 static ir_node *create_lazy_op(const binary_expression_t *expression)
2289 {
2290         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2291         type_t   *type = expression->base.type;
2292         ir_mode  *mode = get_ir_mode(type);
2293
2294         if (is_constant_expression(expression->left)) {
2295                 long val = fold_constant(expression->left);
2296                 expression_kind_t ekind = expression->base.kind;
2297                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2298                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2299                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2300                         return expression_to_firm(expression->right);
2301                 } else {
2302                         return new_Const(mode, get_mode_one(mode));
2303                 }
2304         }
2305
2306         return produce_condition_result((const expression_t*) expression, dbgi);
2307 }
2308
2309 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2310                                             ir_node *right, ir_mode *mode);
2311
2312 static ir_node *create_assign_binop(const binary_expression_t *expression)
2313 {
2314         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2315         const expression_t *left_expr = expression->left;
2316         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2317         ir_node            *left_addr = expression_to_addr(left_expr);
2318         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2319         ir_node            *right     = expression_to_firm(expression->right);
2320         ir_node            *result    = create_op(dbgi, expression, left, right);
2321
2322         result = create_conv(dbgi, result, left_mode);
2323         result = do_strict_conv(dbgi, result);
2324
2325         set_value_for_expression_addr(left_expr, result, left_addr);
2326
2327         return result;
2328 }
2329
2330 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2331 {
2332         expression_kind_t kind = expression->base.kind;
2333
2334         switch(kind) {
2335         case EXPR_BINARY_EQUAL:
2336         case EXPR_BINARY_NOTEQUAL:
2337         case EXPR_BINARY_LESS:
2338         case EXPR_BINARY_LESSEQUAL:
2339         case EXPR_BINARY_GREATER:
2340         case EXPR_BINARY_GREATEREQUAL:
2341         case EXPR_BINARY_ISGREATER:
2342         case EXPR_BINARY_ISGREATEREQUAL:
2343         case EXPR_BINARY_ISLESS:
2344         case EXPR_BINARY_ISLESSEQUAL:
2345         case EXPR_BINARY_ISLESSGREATER:
2346         case EXPR_BINARY_ISUNORDERED: {
2347                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2348                 ir_node *left  = expression_to_firm(expression->left);
2349                 ir_node *right = expression_to_firm(expression->right);
2350                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2351                 long     pnc   = get_pnc(kind, expression->left->base.type);
2352                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2353                 return proj;
2354         }
2355         case EXPR_BINARY_ASSIGN: {
2356                 ir_node *addr  = expression_to_addr(expression->left);
2357                 ir_node *right = expression_to_firm(expression->right);
2358                 set_value_for_expression_addr(expression->left, right, addr);
2359
2360                 return right;
2361         }
2362         case EXPR_BINARY_ADD:
2363         case EXPR_BINARY_SUB:
2364         case EXPR_BINARY_MUL:
2365         case EXPR_BINARY_DIV:
2366         case EXPR_BINARY_MOD:
2367         case EXPR_BINARY_BITWISE_AND:
2368         case EXPR_BINARY_BITWISE_OR:
2369         case EXPR_BINARY_BITWISE_XOR:
2370         case EXPR_BINARY_SHIFTLEFT:
2371         case EXPR_BINARY_SHIFTRIGHT:
2372         {
2373                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2374                 ir_node  *left  = expression_to_firm(expression->left);
2375                 ir_node  *right = expression_to_firm(expression->right);
2376                 return create_op(dbgi, expression, left, right);
2377         }
2378         case EXPR_BINARY_LOGICAL_AND:
2379         case EXPR_BINARY_LOGICAL_OR:
2380                 return create_lazy_op(expression);
2381         case EXPR_BINARY_COMMA:
2382                 /* create side effects of left side */
2383                 (void) expression_to_firm(expression->left);
2384                 return _expression_to_firm(expression->right);
2385
2386         case EXPR_BINARY_ADD_ASSIGN:
2387         case EXPR_BINARY_SUB_ASSIGN:
2388         case EXPR_BINARY_MUL_ASSIGN:
2389         case EXPR_BINARY_MOD_ASSIGN:
2390         case EXPR_BINARY_DIV_ASSIGN:
2391         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2392         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2393         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2394         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2395         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2396                 return create_assign_binop(expression);
2397         case EXPR_BINARY_BUILTIN_EXPECT:
2398                 return _expression_to_firm(expression->left);
2399         default:
2400                 panic("TODO binexpr type");
2401         }
2402 }
2403
2404 static ir_node *array_access_addr(const array_access_expression_t *expression)
2405 {
2406         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2407         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2408         ir_node  *offset    = expression_to_firm(expression->index);
2409
2410         type_t  *offset_type = skip_typeref(expression->index->base.type);
2411         ir_mode *mode;
2412         if (is_type_signed(offset_type)) {
2413                 mode = get_ir_mode(type_ssize_t);
2414         } else {
2415                 mode = get_ir_mode(type_size_t);
2416         }
2417         offset = create_conv(dbgi, offset, mode);
2418
2419         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2420         assert(is_type_pointer(ref_type));
2421         pointer_type_t *pointer_type = &ref_type->pointer;
2422
2423         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2424         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2425         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2426                                              mode);
2427         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2428
2429         return result;
2430 }
2431
2432 static ir_node *array_access_to_firm(
2433                 const array_access_expression_t *expression)
2434 {
2435         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2436         ir_node  *addr   = array_access_addr(expression);
2437         type_t   *type   = revert_automatic_type_conversion(
2438                         (const expression_t*) expression);
2439         type             = skip_typeref(type);
2440
2441         return deref_address(dbgi, type, addr);
2442 }
2443
2444 static long get_offsetof_offset(const offsetof_expression_t *expression)
2445 {
2446         type_t *orig_type = expression->type;
2447         long    offset    = 0;
2448
2449         designator_t *designator = expression->designator;
2450         for( ; designator != NULL; designator = designator->next) {
2451                 type_t *type = skip_typeref(orig_type);
2452                 /* be sure the type is constructed */
2453                 (void) get_ir_type(type);
2454
2455                 if (designator->symbol != NULL) {
2456                         assert(is_type_compound(type));
2457                         symbol_t *symbol = designator->symbol;
2458
2459                         declaration_t *declaration = type->compound.declaration;
2460                         declaration_t *iter        = declaration->scope.declarations;
2461                         for( ; iter != NULL; iter = iter->next) {
2462                                 if (iter->symbol == symbol) {
2463                                         break;
2464                                 }
2465                         }
2466                         assert(iter != NULL);
2467
2468                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2469                         offset += get_entity_offset(iter->v.entity);
2470
2471                         orig_type = iter->type;
2472                 } else {
2473                         expression_t *array_index = designator->array_index;
2474                         assert(designator->array_index != NULL);
2475                         assert(is_type_array(type));
2476                         assert(is_type_valid(array_index->base.type));
2477
2478                         long index         = fold_constant(array_index);
2479                         ir_type *arr_type  = get_ir_type(type);
2480                         ir_type *elem_type = get_array_element_type(arr_type);
2481                         long     elem_size = get_type_size_bytes(elem_type);
2482
2483                         offset += index * elem_size;
2484
2485                         orig_type = type->array.element_type;
2486                 }
2487         }
2488
2489         return offset;
2490 }
2491
2492 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2493 {
2494         ir_mode  *mode   = get_ir_mode(expression->base.type);
2495         long      offset = get_offsetof_offset(expression);
2496         tarval   *tv     = new_tarval_from_long(offset, mode);
2497         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2498
2499         return new_d_Const(dbgi, mode, tv);
2500 }
2501
2502 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2503                                      ir_entity *entity, type_t *type);
2504
2505 static ir_node *compound_literal_to_firm(
2506                 const compound_literal_expression_t *expression)
2507 {
2508         type_t *type = expression->type;
2509
2510         /* create an entity on the stack */
2511         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2512
2513         ident     *const id     = id_unique("CompLit.%u");
2514         ir_type   *const irtype = get_ir_type(type);
2515         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2516         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2517         set_entity_ld_ident(entity, id);
2518
2519         set_entity_variability(entity, variability_uninitialized);
2520
2521         /* create initialisation code */
2522         initializer_t *initializer = expression->initializer;
2523         create_local_initializer(initializer, dbgi, entity, type);
2524
2525         /* create a sel for the compound literal address */
2526         ir_node *frame = get_local_frame(entity);
2527         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2528         return sel;
2529 }
2530
2531 /**
2532  * Transform a sizeof expression into Firm code.
2533  */
2534 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2535 {
2536         type_t *type = expression->type;
2537         if (type == NULL) {
2538                 type = expression->tp_expression->base.type;
2539                 assert(type != NULL);
2540         }
2541
2542         type = skip_typeref(type);
2543         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2544         if (is_type_array(type) && type->array.is_vla
2545                         && expression->tp_expression != NULL) {
2546                 expression_to_firm(expression->tp_expression);
2547         }
2548
2549         return get_type_size(type);
2550 }
2551
2552 /**
2553  * Transform an alignof expression into Firm code.
2554  */
2555 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2556 {
2557         type_t *type = expression->type;
2558         if (type == NULL) {
2559                 /* beware: if expression is a variable reference, return the
2560                    alignment of the variable. */
2561                 const expression_t *tp_expression = expression->tp_expression;
2562                 const declaration_t *declaration = expr_is_variable(tp_expression);
2563                 if (declaration != NULL) {
2564                         /* TODO: get the alignment of this variable. */
2565                 }
2566                 type = tp_expression->base.type;
2567                 assert(type != NULL);
2568         }
2569
2570         ir_mode *const mode = get_ir_mode(expression->base.type);
2571         symconst_symbol sym;
2572         sym.type_p = get_ir_type(type);
2573         return new_SymConst(mode, sym, symconst_type_align);
2574 }
2575
2576 static void init_ir_types(void);
2577 long fold_constant(const expression_t *expression)
2578 {
2579         bool constant_folding_old = constant_folding;
2580         constant_folding = true;
2581
2582         init_ir_types();
2583
2584         assert(is_constant_expression(expression));
2585
2586         ir_graph *old_current_ir_graph = current_ir_graph;
2587         if (current_ir_graph == NULL) {
2588                 current_ir_graph = get_const_code_irg();
2589         }
2590
2591         ir_node *cnst = expression_to_firm(expression);
2592         current_ir_graph = old_current_ir_graph;
2593
2594         if (!is_Const(cnst)) {
2595                 panic("couldn't fold constant\n");
2596         }
2597
2598         tarval *tv = get_Const_tarval(cnst);
2599         if (!tarval_is_long(tv)) {
2600                 panic("result of constant folding is not integer\n");
2601         }
2602
2603         constant_folding = constant_folding_old;
2604
2605         return get_tarval_long(tv);
2606 }
2607
2608 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2609 {
2610         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2611
2612         /* first try to fold a constant condition */
2613         if (is_constant_expression(expression->condition)) {
2614                 long val = fold_constant(expression->condition);
2615                 if (val) {
2616                         return expression_to_firm(expression->true_expression);
2617                 } else {
2618                         return expression_to_firm(expression->false_expression);
2619                 }
2620         }
2621
2622         ir_node *cur_block   = get_cur_block();
2623
2624         /* create the true block */
2625         ir_node *true_block  = new_immBlock();
2626
2627         ir_node *true_val = expression_to_firm(expression->true_expression);
2628         ir_node *true_jmp = new_Jmp();
2629
2630         /* create the false block */
2631         ir_node *false_block = new_immBlock();
2632
2633         ir_node *false_val = expression_to_firm(expression->false_expression);
2634         ir_node *false_jmp = new_Jmp();
2635
2636         /* create the condition evaluation */
2637         set_cur_block(cur_block);
2638         create_condition_evaluation(expression->condition, true_block, false_block);
2639         mature_immBlock(true_block);
2640         mature_immBlock(false_block);
2641
2642         /* create the common block */
2643         ir_node *common_block = new_immBlock();
2644         add_immBlock_pred(common_block, true_jmp);
2645         add_immBlock_pred(common_block, false_jmp);
2646         mature_immBlock(common_block);
2647
2648         /* TODO improve static semantics, so either both or no values are NULL */
2649         if (true_val == NULL || false_val == NULL)
2650                 return NULL;
2651
2652         ir_node *in[2] = { true_val, false_val };
2653         ir_mode *mode  = get_irn_mode(true_val);
2654         assert(get_irn_mode(false_val) == mode);
2655         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2656
2657         return val;
2658 }
2659
2660 /**
2661  * Returns an IR-node representing the address of a field.
2662  */
2663 static ir_node *select_addr(const select_expression_t *expression)
2664 {
2665         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2666
2667         ir_node *compound_addr = expression_to_firm(expression->compound);
2668
2669         /* make sure the type is constructed */
2670         type_t *type = skip_typeref(expression->compound->base.type);
2671         if (is_type_pointer(type)) {
2672                 type = type->pointer.points_to;
2673         }
2674         (void) get_ir_type(type);
2675
2676         declaration_t *entry = expression->compound_entry;
2677         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2678         ir_entity     *entity = entry->v.entity;
2679
2680         assert(entity != NULL);
2681
2682         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2683
2684         return sel;
2685 }
2686
2687 static ir_node *select_to_firm(const select_expression_t *expression)
2688 {
2689         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2690         ir_node  *addr = select_addr(expression);
2691         type_t   *type = revert_automatic_type_conversion(
2692                         (const expression_t*) expression);
2693         type           = skip_typeref(type);
2694
2695         declaration_t *entry      = expression->compound_entry;
2696         type_t        *entry_type = skip_typeref(entry->type);
2697
2698         if (entry_type->kind == TYPE_BITFIELD) {
2699                 return bitfield_extract_to_firm(expression, addr);
2700         }
2701
2702         return deref_address(dbgi, type, addr);
2703 }
2704
2705 /* Values returned by __builtin_classify_type. */
2706 typedef enum gcc_type_class
2707 {
2708         no_type_class = -1,
2709         void_type_class,
2710         integer_type_class,
2711         char_type_class,
2712         enumeral_type_class,
2713         boolean_type_class,
2714         pointer_type_class,
2715         reference_type_class,
2716         offset_type_class,
2717         real_type_class,
2718         complex_type_class,
2719         function_type_class,
2720         method_type_class,
2721         record_type_class,
2722         union_type_class,
2723         array_type_class,
2724         string_type_class,
2725         set_type_class,
2726         file_type_class,
2727         lang_type_class
2728 } gcc_type_class;
2729
2730 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2731 {
2732         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2733
2734         gcc_type_class tc;
2735         switch (type->kind)
2736         {
2737                 case TYPE_ATOMIC: {
2738                         const atomic_type_t *const atomic_type = &type->atomic;
2739                         switch (atomic_type->akind) {
2740                                 /* should not be reached */
2741                                 case ATOMIC_TYPE_INVALID:
2742                                         tc = no_type_class;
2743                                         goto make_const;
2744
2745                                 /* gcc cannot do that */
2746                                 case ATOMIC_TYPE_VOID:
2747                                         tc = void_type_class;
2748                                         goto make_const;
2749
2750                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2751                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2752                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2753                                 case ATOMIC_TYPE_SHORT:
2754                                 case ATOMIC_TYPE_USHORT:
2755                                 case ATOMIC_TYPE_INT:
2756                                 case ATOMIC_TYPE_UINT:
2757                                 case ATOMIC_TYPE_LONG:
2758                                 case ATOMIC_TYPE_ULONG:
2759                                 case ATOMIC_TYPE_LONGLONG:
2760                                 case ATOMIC_TYPE_ULONGLONG:
2761                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2762                                         tc = integer_type_class;
2763                                         goto make_const;
2764
2765                                 case ATOMIC_TYPE_FLOAT:
2766                                 case ATOMIC_TYPE_DOUBLE:
2767                                 case ATOMIC_TYPE_LONG_DOUBLE:
2768                                         tc = real_type_class;
2769                                         goto make_const;
2770                         }
2771                         panic("Unexpected atomic type in classify_type_to_firm().");
2772                 }
2773
2774                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2775                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2776                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2777                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2778                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2779                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2780                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2781                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2782
2783                 /* gcc handles this as integer */
2784                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2785
2786                 case TYPE_BUILTIN:
2787                 /* typedef/typeof should be skipped already */
2788                 case TYPE_TYPEDEF:
2789                 case TYPE_TYPEOF:
2790                 case TYPE_INVALID:
2791                 case TYPE_ERROR:
2792                         break;
2793         }
2794         panic("unexpected TYPE classify_type_to_firm().");
2795
2796 make_const: ;
2797         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2798         ir_mode  *const mode = mode_int;
2799         tarval   *const tv   = new_tarval_from_long(tc, mode);
2800         return new_d_Const(dbgi, mode, tv);
2801 }
2802
2803 static ir_node *function_name_to_firm(
2804                 const funcname_expression_t *const expr)
2805 {
2806         switch(expr->kind) {
2807         case FUNCNAME_FUNCTION:
2808         case FUNCNAME_PRETTY_FUNCTION:
2809         case FUNCNAME_FUNCDNAME:
2810                 if (current_function_name == NULL) {
2811                         const source_position_t *const src_pos = &expr->base.source_position;
2812                         const char *const name = current_function_decl->symbol->string;
2813                         const string_t string = { name, strlen(name) + 1 };
2814                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2815                 }
2816                 return current_function_name;
2817         case FUNCNAME_FUNCSIG:
2818                 if (current_funcsig == NULL) {
2819                         const source_position_t *const src_pos = &expr->base.source_position;
2820                         ir_entity *ent = get_irg_entity(current_ir_graph);
2821                         const char *const name = get_entity_ld_name(ent);
2822                         const string_t string = { name, strlen(name) + 1 };
2823                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2824                 }
2825                 return current_funcsig;
2826         }
2827         panic("Unsupported function name");
2828 }
2829
2830 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2831 {
2832         statement_t *statement = expr->statement;
2833
2834         assert(statement->kind == STATEMENT_COMPOUND);
2835         return compound_statement_to_firm(&statement->compound);
2836 }
2837
2838 static ir_node *va_start_expression_to_firm(
2839         const va_start_expression_t *const expr)
2840 {
2841         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2842         int        const n           = get_method_n_params(method_type) - 1;
2843         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2844         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2845         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2846         ir_node   *const no_mem      = new_NoMem();
2847         ir_node   *const arg_sel     =
2848                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2849
2850         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2851         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2852         set_value_for_expression(expr->ap, add);
2853
2854         return NULL;
2855 }
2856
2857 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2858 {
2859         type_t       *const type    = expr->base.type;
2860         expression_t *const ap_expr = expr->ap;
2861         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2862         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2863         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2864         ir_node      *const res     = deref_address(dbgi, type, ap);
2865
2866         ir_node      *const cnst    = get_type_size(expr->base.type);
2867         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2868
2869         set_value_for_expression_addr(ap_expr, add, ap_addr);
2870
2871         return res;
2872 }
2873
2874 static ir_node *dereference_addr(const unary_expression_t *const expression)
2875 {
2876         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2877         return expression_to_firm(expression->value);
2878 }
2879
2880 /**
2881  * Returns a IR-node representing an lvalue of the given expression.
2882  */
2883 static ir_node *expression_to_addr(const expression_t *expression)
2884 {
2885         switch(expression->kind) {
2886         case EXPR_REFERENCE:
2887                 return reference_addr(&expression->reference);
2888         case EXPR_ARRAY_ACCESS:
2889                 return array_access_addr(&expression->array_access);
2890         case EXPR_SELECT:
2891                 return select_addr(&expression->select);
2892         case EXPR_CALL:
2893                 return call_expression_to_firm(&expression->call);
2894         case EXPR_UNARY_DEREFERENCE: {
2895                 return dereference_addr(&expression->unary);
2896         }
2897         default:
2898                 break;
2899         }
2900         panic("trying to get address of non-lvalue");
2901 }
2902
2903 static ir_node *builtin_constant_to_firm(
2904                 const builtin_constant_expression_t *expression)
2905 {
2906         ir_mode *mode = get_ir_mode(expression->base.type);
2907         long     v;
2908
2909         if (is_constant_expression(expression->value)) {
2910                 v = 1;
2911         } else {
2912                 v = 0;
2913         }
2914         return new_Const_long(mode, v);
2915 }
2916
2917 static ir_node *builtin_prefetch_to_firm(
2918                 const builtin_prefetch_expression_t *expression)
2919 {
2920         ir_node *adr = expression_to_firm(expression->adr);
2921         /* no Firm support for prefetch yet */
2922         (void) adr;
2923         return NULL;
2924 }
2925
2926 /**
2927  * creates firm nodes for an expression. The difference between this function
2928  * and expression_to_firm is, that this version might produce mode_b nodes
2929  * instead of mode_Is.
2930  */
2931 static ir_node *_expression_to_firm(const expression_t *expression)
2932 {
2933 #ifndef NDEBUG
2934         if (!constant_folding) {
2935                 assert(!expression->base.transformed);
2936                 ((expression_t*) expression)->base.transformed = true;
2937         }
2938 #endif
2939
2940         switch(expression->kind) {
2941         case EXPR_CHARACTER_CONSTANT:
2942                 return character_constant_to_firm(&expression->conste);
2943         case EXPR_WIDE_CHARACTER_CONSTANT:
2944                 return wide_character_constant_to_firm(&expression->conste);
2945         case EXPR_CONST:
2946                 return const_to_firm(&expression->conste);
2947         case EXPR_STRING_LITERAL:
2948                 return string_literal_to_firm(&expression->string);
2949         case EXPR_WIDE_STRING_LITERAL:
2950                 return wide_string_literal_to_firm(&expression->wide_string);
2951         case EXPR_REFERENCE:
2952                 return reference_expression_to_firm(&expression->reference);
2953         case EXPR_CALL:
2954                 return call_expression_to_firm(&expression->call);
2955         EXPR_UNARY_CASES
2956                 return unary_expression_to_firm(&expression->unary);
2957         EXPR_BINARY_CASES
2958                 return binary_expression_to_firm(&expression->binary);
2959         case EXPR_ARRAY_ACCESS:
2960                 return array_access_to_firm(&expression->array_access);
2961         case EXPR_SIZEOF:
2962                 return sizeof_to_firm(&expression->typeprop);
2963         case EXPR_ALIGNOF:
2964                 return alignof_to_firm(&expression->typeprop);
2965         case EXPR_CONDITIONAL:
2966                 return conditional_to_firm(&expression->conditional);
2967         case EXPR_SELECT:
2968                 return select_to_firm(&expression->select);
2969         case EXPR_CLASSIFY_TYPE:
2970                 return classify_type_to_firm(&expression->classify_type);
2971         case EXPR_FUNCNAME:
2972                 return function_name_to_firm(&expression->funcname);
2973         case EXPR_STATEMENT:
2974                 return statement_expression_to_firm(&expression->statement);
2975         case EXPR_VA_START:
2976                 return va_start_expression_to_firm(&expression->va_starte);
2977         case EXPR_VA_ARG:
2978                 return va_arg_expression_to_firm(&expression->va_arge);
2979         case EXPR_BUILTIN_SYMBOL:
2980                 panic("unimplemented expression found");
2981         case EXPR_BUILTIN_CONSTANT_P:
2982                 return builtin_constant_to_firm(&expression->builtin_constant);
2983         case EXPR_BUILTIN_PREFETCH:
2984                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2985         case EXPR_OFFSETOF:
2986                 return offsetof_to_firm(&expression->offsetofe);
2987         case EXPR_COMPOUND_LITERAL:
2988                 return compound_literal_to_firm(&expression->compound_literal);
2989
2990         case EXPR_UNKNOWN:
2991         case EXPR_INVALID:
2992                 break;
2993         }
2994         panic("invalid expression found");
2995 }
2996
2997 static bool produces_mode_b(const expression_t *expression)
2998 {
2999         switch (expression->kind) {
3000         case EXPR_BINARY_EQUAL:
3001         case EXPR_BINARY_NOTEQUAL:
3002         case EXPR_BINARY_LESS:
3003         case EXPR_BINARY_LESSEQUAL:
3004         case EXPR_BINARY_GREATER:
3005         case EXPR_BINARY_GREATEREQUAL:
3006         case EXPR_BINARY_ISGREATER:
3007         case EXPR_BINARY_ISGREATEREQUAL:
3008         case EXPR_BINARY_ISLESS:
3009         case EXPR_BINARY_ISLESSEQUAL:
3010         case EXPR_BINARY_ISLESSGREATER:
3011         case EXPR_BINARY_ISUNORDERED:
3012         case EXPR_UNARY_NOT:
3013                 return true;
3014
3015         case EXPR_BINARY_BUILTIN_EXPECT:
3016                 return produces_mode_b(expression->binary.left);
3017         case EXPR_BINARY_COMMA:
3018                 return produces_mode_b(expression->binary.right);
3019
3020         default:
3021                 return false;
3022         }
3023 }
3024
3025 static ir_node *expression_to_firm(const expression_t *expression)
3026 {
3027         if (!produces_mode_b(expression)) {
3028                 ir_node *res = _expression_to_firm(expression);
3029                 assert(res == NULL || get_irn_mode(res) != mode_b);
3030                 return res;
3031         }
3032
3033         if (is_constant_expression(expression)) {
3034                 ir_node *res  = _expression_to_firm(expression);
3035                 ir_mode *mode = get_ir_mode(expression->base.type);
3036                 assert(is_Const(res));
3037                 if (is_Const_null(res)) {
3038                         return new_Const_long(mode, 0);
3039                 } else {
3040                         return new_Const_long(mode, 1);
3041                 }
3042         }
3043
3044         /* we have to produce a 0/1 from the mode_b expression */
3045         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3046         return produce_condition_result(expression, dbgi);
3047 }
3048
3049 static ir_node *expression_to_modeb(const expression_t *expression)
3050 {
3051         ir_node *res = _expression_to_firm(expression);
3052         res          = create_conv(NULL, res, mode_b);
3053
3054         return res;
3055 }
3056
3057 /**
3058  * create a short-circuit expression evaluation that tries to construct
3059  * efficient control flow structures for &&, || and ! expressions
3060  */
3061 static void create_condition_evaluation(const expression_t *expression,
3062                                         ir_node *true_block,
3063                                         ir_node *false_block)
3064 {
3065         switch(expression->kind) {
3066         case EXPR_UNARY_NOT: {
3067                 const unary_expression_t *unary_expression = &expression->unary;
3068                 create_condition_evaluation(unary_expression->value, false_block,
3069                                             true_block);
3070                 return;
3071         }
3072         case EXPR_BINARY_LOGICAL_AND: {
3073                 const binary_expression_t *binary_expression = &expression->binary;
3074
3075                 ir_node *cur_block   = get_cur_block();
3076                 ir_node *extra_block = new_immBlock();
3077                 set_cur_block(cur_block);
3078                 create_condition_evaluation(binary_expression->left, extra_block,
3079                                             false_block);
3080                 mature_immBlock(extra_block);
3081                 set_cur_block(extra_block);
3082                 create_condition_evaluation(binary_expression->right, true_block,
3083                                             false_block);
3084                 return;
3085         }
3086         case EXPR_BINARY_LOGICAL_OR: {
3087                 const binary_expression_t *binary_expression = &expression->binary;
3088
3089                 ir_node *cur_block   = get_cur_block();
3090                 ir_node *extra_block = new_immBlock();
3091                 set_cur_block(cur_block);
3092                 create_condition_evaluation(binary_expression->left, true_block,
3093                                             extra_block);
3094                 mature_immBlock(extra_block);
3095                 set_cur_block(extra_block);
3096                 create_condition_evaluation(binary_expression->right, true_block,
3097                                             false_block);
3098                 return;
3099         }
3100         default:
3101                 break;
3102         }
3103
3104         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3105         ir_node  *condition  = expression_to_modeb(expression);
3106         ir_node  *cond       = new_d_Cond(dbgi, condition);
3107         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3108         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3109
3110         /* set branch prediction info based on __builtin_expect */
3111         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3112                 long               cnst = fold_constant(expression->binary.right);
3113                 cond_jmp_predicate pred;
3114
3115                 if (cnst == 0) {
3116                         pred = COND_JMP_PRED_FALSE;
3117                 } else {
3118                         pred = COND_JMP_PRED_TRUE;
3119                 }
3120                 set_Cond_jmp_pred(cond, pred);
3121         }
3122
3123         add_immBlock_pred(true_block, true_proj);
3124         if (false_block != NULL) {
3125                 add_immBlock_pred(false_block, false_proj);
3126         }
3127
3128         set_cur_block(NULL);
3129 }
3130
3131
3132
3133 static void create_declaration_entity(declaration_t *declaration,
3134                                       declaration_kind_t declaration_kind,
3135                                       ir_type *parent_type)
3136 {
3137         type_t    *const type   = skip_typeref(declaration->type);
3138         if (is_type_function(type)) {
3139                 (void) get_function_entity(declaration);
3140                 return;
3141         }
3142
3143         ident     *const id     = new_id_from_str(declaration->symbol->string);
3144         ir_type   *const irtype = get_ir_type(type);
3145         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3146         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3147
3148         declaration->declaration_kind = (unsigned char) declaration_kind;
3149         declaration->v.entity         = entity;
3150         set_entity_variability(entity, variability_uninitialized);
3151         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3152         if (parent_type == get_tls_type())
3153                 set_entity_allocation(entity, allocation_automatic);
3154         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3155                 set_entity_allocation(entity, allocation_static);
3156
3157         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3158                 set_entity_volatility(entity, volatility_is_volatile);
3159         }
3160 }
3161
3162
3163 typedef struct type_path_entry_t type_path_entry_t;
3164 struct type_path_entry_t {
3165         type_t           *type;
3166         ir_initializer_t *initializer;
3167         size_t            index;
3168         declaration_t    *compound_entry;
3169 };
3170
3171 typedef struct type_path_t type_path_t;
3172 struct type_path_t {
3173         type_path_entry_t *path;
3174         type_t            *top_type;
3175         bool               invalid;
3176 };
3177
3178 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3179 {
3180         size_t len = ARR_LEN(path->path);
3181
3182         for(size_t i = 0; i < len; ++i) {
3183                 const type_path_entry_t *entry = & path->path[i];
3184
3185                 type_t *type = skip_typeref(entry->type);
3186                 if (is_type_compound(type)) {
3187                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3188                 } else if (is_type_array(type)) {
3189                         fprintf(stderr, "[%zd]", entry->index);
3190                 } else {
3191                         fprintf(stderr, "-INVALID-");
3192                 }
3193         }
3194         fprintf(stderr, "  (");
3195         print_type(path->top_type);
3196         fprintf(stderr, ")");
3197 }
3198
3199 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3200 {
3201         size_t len = ARR_LEN(path->path);
3202         assert(len > 0);
3203         return & path->path[len-1];
3204 }
3205
3206 static type_path_entry_t *append_to_type_path(type_path_t *path)
3207 {
3208         size_t len = ARR_LEN(path->path);
3209         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3210
3211         type_path_entry_t *result = & path->path[len];
3212         memset(result, 0, sizeof(result[0]));
3213         return result;
3214 }
3215
3216 static size_t get_compound_size(const compound_type_t *type)
3217 {
3218         declaration_t *declaration = type->declaration;
3219         declaration_t *member      = declaration->scope.declarations;
3220         size_t         size        = 0;
3221         for( ; member != NULL; member = member->next) {
3222                 ++size;
3223         }
3224         /* TODO: cache results? */
3225
3226         return size;
3227 }
3228
3229 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3230 {
3231         type_t *orig_top_type = path->top_type;
3232         type_t *top_type      = skip_typeref(orig_top_type);
3233
3234         assert(is_type_compound(top_type) || is_type_array(top_type));
3235
3236         if (ARR_LEN(path->path) == 0) {
3237                 return NULL;
3238         } else {
3239                 type_path_entry_t *top         = get_type_path_top(path);
3240                 ir_initializer_t  *initializer = top->initializer;
3241                 return get_initializer_compound_value(initializer, top->index);
3242         }
3243 }
3244
3245 static void descend_into_subtype(type_path_t *path)
3246 {
3247         type_t *orig_top_type = path->top_type;
3248         type_t *top_type      = skip_typeref(orig_top_type);
3249
3250         assert(is_type_compound(top_type) || is_type_array(top_type));
3251
3252         ir_initializer_t *initializer = get_initializer_entry(path);
3253
3254         type_path_entry_t *top = append_to_type_path(path);
3255         top->type              = top_type;
3256
3257         size_t len;
3258
3259         if (is_type_compound(top_type)) {
3260                 declaration_t *declaration = top_type->compound.declaration;
3261                 declaration_t *entry       = declaration->scope.declarations;
3262
3263                 top->compound_entry = entry;
3264                 top->index          = 0;
3265                 len                 = get_compound_size(&top_type->compound);
3266                 if (entry != NULL)
3267                         path->top_type = entry->type;
3268         } else {
3269                 assert(is_type_array(top_type));
3270                 assert(top_type->array.size > 0);
3271
3272                 top->index     = 0;
3273                 path->top_type = top_type->array.element_type;
3274                 len            = top_type->array.size;
3275         }
3276         if (initializer == NULL
3277                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3278                 initializer = create_initializer_compound(len);
3279                 /* we have to set the entry at the 2nd latest path entry... */
3280                 size_t path_len = ARR_LEN(path->path);
3281                 assert(path_len >= 1);
3282                 if (path_len > 1) {
3283                         type_path_entry_t *entry        = & path->path[path_len-2];
3284                         ir_initializer_t  *tinitializer = entry->initializer;
3285                         set_initializer_compound_value(tinitializer, entry->index,
3286                                                        initializer);
3287                 }
3288         }
3289         top->initializer = initializer;
3290 }
3291
3292 static void ascend_from_subtype(type_path_t *path)
3293 {
3294         type_path_entry_t *top = get_type_path_top(path);
3295
3296         path->top_type = top->type;
3297
3298         size_t len = ARR_LEN(path->path);
3299         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3300 }
3301
3302 static void walk_designator(type_path_t *path, const designator_t *designator)
3303 {
3304         /* designators start at current object type */
3305         ARR_RESIZE(type_path_entry_t, path->path, 1);
3306
3307         for( ; designator != NULL; designator = designator->next) {
3308                 type_path_entry_t *top         = get_type_path_top(path);
3309                 type_t            *orig_type   = top->type;
3310                 type_t            *type        = skip_typeref(orig_type);
3311
3312                 if (designator->symbol != NULL) {
3313                         assert(is_type_compound(type));
3314                         size_t    index  = 0;
3315                         symbol_t *symbol = designator->symbol;
3316
3317                         declaration_t *declaration = type->compound.declaration;
3318                         declaration_t *iter        = declaration->scope.declarations;
3319                         for( ; iter != NULL; iter = iter->next, ++index) {
3320                                 if (iter->symbol == symbol) {
3321                                         break;
3322                                 }
3323                         }
3324                         assert(iter != NULL);
3325
3326                         top->type           = orig_type;
3327                         top->compound_entry = iter;
3328                         top->index          = index;
3329                         orig_type           = iter->type;
3330                 } else {
3331                         expression_t *array_index = designator->array_index;
3332                         assert(designator->array_index != NULL);
3333                         assert(is_type_array(type));
3334                         assert(is_type_valid(array_index->base.type));
3335
3336                         long index = fold_constant(array_index);
3337                         assert(index >= 0);
3338 #ifndef NDEBUG
3339                         if (type->array.size_constant == 1) {
3340                                 long array_size = type->array.size;
3341                                 assert(index < array_size);
3342                         }
3343 #endif
3344
3345                         top->type  = orig_type;
3346                         top->index = (size_t) index;
3347                         orig_type  = type->array.element_type;
3348                 }
3349                 path->top_type = orig_type;
3350
3351                 if (designator->next != NULL) {
3352                         descend_into_subtype(path);
3353                 }
3354         }
3355
3356         path->invalid  = false;
3357 }
3358
3359 static void advance_current_object(type_path_t *path)
3360 {
3361         if (path->invalid) {
3362                 /* TODO: handle this... */
3363                 panic("invalid initializer in ast2firm (excessive elements)");
3364                 return;
3365         }
3366
3367         type_path_entry_t *top = get_type_path_top(path);
3368
3369         type_t *type = skip_typeref(top->type);
3370         if (is_type_union(type)) {
3371                 top->compound_entry = NULL;
3372         } else if (is_type_struct(type)) {
3373                 declaration_t *entry = top->compound_entry;
3374
3375                 top->index++;
3376                 entry               = entry->next;
3377                 top->compound_entry = entry;
3378                 if (entry != NULL) {
3379                         path->top_type = entry->type;
3380                         return;
3381                 }
3382         } else {
3383                 assert(is_type_array(type));
3384
3385                 top->index++;
3386                 if (!type->array.size_constant || top->index < type->array.size) {
3387                         return;
3388                 }
3389         }
3390
3391         /* we're past the last member of the current sub-aggregate, try if we
3392          * can ascend in the type hierarchy and continue with another subobject */
3393         size_t len = ARR_LEN(path->path);
3394
3395         if (len > 1) {
3396                 ascend_from_subtype(path);
3397                 advance_current_object(path);
3398         } else {
3399                 path->invalid = true;
3400         }
3401 }
3402
3403
3404 static ir_initializer_t *create_ir_initializer(
3405                 const initializer_t *initializer, type_t *type);
3406
3407 static ir_initializer_t *create_ir_initializer_value(
3408                 const initializer_value_t *initializer)
3409 {
3410         if (is_type_compound(initializer->value->base.type)) {
3411                 panic("initializer creation for compounds not implemented yet");
3412         }
3413         ir_node *value = expression_to_firm(initializer->value);
3414         return create_initializer_const(value);
3415 }
3416
3417 static ir_initializer_t *create_ir_initializer_list(
3418                 const initializer_list_t *initializer, type_t *type)
3419 {
3420         type_path_t path;
3421         memset(&path, 0, sizeof(path));
3422         path.top_type = type;
3423         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3424
3425         descend_into_subtype(&path);
3426
3427         for(size_t i = 0; i < initializer->len; ++i) {
3428                 const initializer_t *sub_initializer = initializer->initializers[i];
3429
3430                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3431                         walk_designator(&path, sub_initializer->designator.designator);
3432                         continue;
3433                 }
3434
3435                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3436                         /* we might have to descend into types until we're at a scalar
3437                          * type */
3438                         while(true) {
3439                                 type_t *orig_top_type = path.top_type;
3440                                 type_t *top_type      = skip_typeref(orig_top_type);
3441
3442                                 if (is_type_scalar(top_type))
3443                                         break;
3444                                 descend_into_subtype(&path);
3445                         }
3446                 }
3447
3448                 ir_initializer_t *sub_irinitializer
3449                         = create_ir_initializer(sub_initializer, path.top_type);
3450
3451                 size_t path_len = ARR_LEN(path.path);
3452                 assert(path_len >= 1);
3453                 type_path_entry_t *entry        = & path.path[path_len-1];
3454                 ir_initializer_t  *tinitializer = entry->initializer;
3455                 set_initializer_compound_value(tinitializer, entry->index,
3456                                                sub_irinitializer);
3457
3458                 advance_current_object(&path);
3459         }
3460
3461         assert(ARR_LEN(path.path) >= 1);
3462         ir_initializer_t *result = path.path[0].initializer;
3463         DEL_ARR_F(path.path);
3464
3465         return result;
3466 }
3467
3468 static ir_initializer_t *create_ir_initializer_string(
3469                 const initializer_string_t *initializer, type_t *type)
3470 {
3471         type = skip_typeref(type);
3472
3473         size_t            string_len    = initializer->string.size;
3474         assert(type->kind == TYPE_ARRAY);
3475         assert(type->array.size_constant);
3476         size_t            len           = type->array.size;
3477         ir_initializer_t *irinitializer = create_initializer_compound(len);
3478
3479         const char *string = initializer->string.begin;
3480         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3481
3482         for(size_t i = 0; i < len; ++i) {
3483                 char c = 0;
3484                 if (i < string_len)
3485                         c = string[i];
3486
3487                 tarval           *tv = new_tarval_from_long(c, mode);
3488                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3489
3490                 set_initializer_compound_value(irinitializer, i, char_initializer);
3491         }
3492
3493         return irinitializer;
3494 }
3495
3496 static ir_initializer_t *create_ir_initializer_wide_string(
3497                 const initializer_wide_string_t *initializer, type_t *type)
3498 {
3499         size_t            string_len    = initializer->string.size;
3500         assert(type->kind == TYPE_ARRAY);
3501         assert(type->array.size_constant);
3502         size_t            len           = type->array.size;
3503         ir_initializer_t *irinitializer = create_initializer_compound(len);
3504
3505         const wchar_rep_t *string = initializer->string.begin;
3506         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3507
3508         for(size_t i = 0; i < len; ++i) {
3509                 wchar_rep_t c = 0;
3510                 if (i < string_len) {
3511                         c = string[i];
3512                 }
3513                 tarval *tv = new_tarval_from_long(c, mode);
3514                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3515
3516                 set_initializer_compound_value(irinitializer, i, char_initializer);
3517         }
3518
3519         return irinitializer;
3520 }
3521
3522 static ir_initializer_t *create_ir_initializer(
3523                 const initializer_t *initializer, type_t *type)
3524 {
3525         switch(initializer->kind) {
3526                 case INITIALIZER_STRING:
3527                         return create_ir_initializer_string(&initializer->string, type);
3528
3529                 case INITIALIZER_WIDE_STRING:
3530                         return create_ir_initializer_wide_string(&initializer->wide_string,
3531                                                                  type);
3532
3533                 case INITIALIZER_LIST:
3534                         return create_ir_initializer_list(&initializer->list, type);
3535
3536                 case INITIALIZER_VALUE:
3537                         return create_ir_initializer_value(&initializer->value);
3538
3539                 case INITIALIZER_DESIGNATOR:
3540                         panic("unexpected designator initializer found");
3541         }
3542         panic("unknown initializer");
3543 }
3544
3545 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3546                 ir_node *base_addr)
3547 {
3548         if (is_atomic_type(type)) {
3549                 ir_mode *mode = get_type_mode(type);
3550                 tarval  *zero = get_mode_null(mode);
3551                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3552
3553                 /* TODO: bitfields */
3554                 ir_node *mem    = get_store();
3555                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3556                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3557                 set_store(proj_m);
3558         } else {
3559                 assert(is_compound_type(type));
3560
3561                 int n_members;
3562                 if (is_Array_type(type)) {
3563                         assert(has_array_upper_bound(type, 0));
3564                         n_members = get_array_upper_bound_int(type, 0);
3565                 } else {
3566                         n_members = get_compound_n_members(type);
3567                 }
3568
3569                 for(int i = 0; i < n_members; ++i) {
3570                         ir_node *addr;
3571                         ir_type *irtype;
3572                         if (is_Array_type(type)) {
3573                                 ir_entity *entity   = get_array_element_entity(type);
3574                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3575                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3576                                 ir_node   *in[1]    = { cnst };
3577                                 irtype = get_array_element_type(type);
3578                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3579                         } else {
3580                                 ir_entity *member = get_compound_member(type, i);
3581
3582                                 irtype = get_entity_type(member);
3583                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3584                         }
3585
3586                         create_dynamic_null_initializer(irtype, dbgi, addr);
3587                 }
3588         }
3589 }
3590
3591 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3592                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3593 {
3594         switch(get_initializer_kind(initializer)) {
3595         case IR_INITIALIZER_NULL: {
3596                 create_dynamic_null_initializer(type, dbgi, base_addr);
3597                 return;
3598         }
3599         case IR_INITIALIZER_CONST: {
3600                 ir_node *node = get_initializer_const_value(initializer);
3601                 ir_mode *mode = get_irn_mode(node);
3602                 assert(get_type_mode(type) == mode);
3603
3604                 /* TODO: bitfields... */
3605                 ir_node *mem    = get_store();
3606                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3607                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3608                 set_store(proj_m);
3609                 return;
3610         }
3611         case IR_INITIALIZER_TARVAL: {
3612                 tarval  *tv   = get_initializer_tarval_value(initializer);
3613                 ir_mode *mode = get_tarval_mode(tv);
3614                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3615                 assert(get_type_mode(type) == mode);
3616
3617                 /* TODO: bitfields... */
3618                 ir_node *mem    = get_store();
3619                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3620                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3621                 set_store(proj_m);
3622                 return;
3623         }
3624         case IR_INITIALIZER_COMPOUND: {
3625                 assert(is_compound_type(type));
3626                 int n_members;
3627                 if (is_Array_type(type)) {
3628                         assert(has_array_upper_bound(type, 0));
3629                         n_members = get_array_upper_bound_int(type, 0);
3630                 } else {
3631                         n_members = get_compound_n_members(type);
3632                 }
3633
3634                 if (get_initializer_compound_n_entries(initializer)
3635                                 != (unsigned) n_members)
3636                         panic("initializer doesn't match compound type");
3637
3638                 for(int i = 0; i < n_members; ++i) {
3639                         ir_node *addr;
3640                         ir_type *irtype;
3641                         if (is_Array_type(type)) {
3642                                 ir_entity *entity   = get_array_element_entity(type);
3643                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3644                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3645                                 ir_node   *in[1]    = { cnst };
3646                                 irtype = get_array_element_type(type);
3647                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3648                         } else {
3649                                 ir_entity *member = get_compound_member(type, i);
3650
3651                                 irtype = get_entity_type(member);
3652                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3653                         }
3654
3655                         ir_initializer_t *sub_init
3656                                 = get_initializer_compound_value(initializer, i);
3657
3658                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3659                 }
3660                 return;
3661         }
3662         }
3663
3664         panic("invalid IR_INITIALIZER found");
3665 }
3666
3667 static void create_dynamic_initializer(ir_initializer_t *initializer,
3668                 dbg_info *dbgi, ir_entity *entity)
3669 {
3670         ir_node *frame     = get_local_frame(entity);
3671         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3672         ir_type *type      = get_entity_type(entity);
3673
3674         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3675 }
3676
3677 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3678                                      ir_entity *entity, type_t *type)
3679 {
3680         ir_node *memory = get_store();
3681         ir_node *nomem  = new_NoMem();
3682         ir_node *frame  = get_irg_frame(current_ir_graph);
3683         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3684
3685         if (initializer->kind == INITIALIZER_VALUE) {
3686                 initializer_value_t *initializer_value = &initializer->value;
3687
3688                 ir_node *value = expression_to_firm(initializer_value->value);
3689                 type = skip_typeref(type);
3690                 assign_value(dbgi, addr, type, value);
3691                 return;
3692         }
3693
3694         if (!is_constant_initializer(initializer)) {
3695                 ir_initializer_t *irinitializer
3696                         = create_ir_initializer(initializer, type);
3697
3698                 create_dynamic_initializer(irinitializer, dbgi, entity);
3699                 return;
3700         }
3701
3702         /* create the ir_initializer */
3703         ir_graph *const old_current_ir_graph = current_ir_graph;
3704         current_ir_graph = get_const_code_irg();
3705
3706         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3707
3708         assert(current_ir_graph == get_const_code_irg());
3709         current_ir_graph = old_current_ir_graph;
3710
3711         /* create a "template" entity which is copied to the entity on the stack */
3712         ident     *const id          = id_unique("initializer.%u");
3713         ir_type   *const irtype      = get_ir_type(type);
3714         ir_type   *const global_type = get_glob_type();
3715         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3716         set_entity_ld_ident(init_entity, id);
3717
3718         set_entity_variability(init_entity, variability_initialized);
3719         set_entity_visibility(init_entity, visibility_local);
3720         set_entity_allocation(init_entity, allocation_static);
3721
3722         set_entity_initializer(init_entity, irinitializer);
3723
3724         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3725         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3726
3727         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3728         set_store(copyb_mem);
3729 }
3730
3731 static void create_initializer_local_variable_entity(declaration_t *declaration)
3732 {
3733         initializer_t *initializer = declaration->init.initializer;
3734         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3735         ir_entity     *entity      = declaration->v.entity;
3736         type_t        *type        = declaration->type;
3737         create_local_initializer(initializer, dbgi, entity, type);
3738 }
3739
3740 static void create_declaration_initializer(declaration_t *declaration)
3741 {
3742         initializer_t *initializer = declaration->init.initializer;
3743         if (initializer == NULL)
3744                 return;
3745
3746         declaration_kind_t declaration_kind
3747                 = (declaration_kind_t) declaration->declaration_kind;
3748         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3749                 create_initializer_local_variable_entity(declaration);
3750                 return;
3751         }
3752
3753         type_t *type = skip_typeref(declaration->type);
3754
3755         if (initializer->kind == INITIALIZER_VALUE) {
3756                 initializer_value_t *initializer_value = &initializer->value;
3757                 dbg_info            *dbgi
3758                         = get_dbg_info(&declaration->source_position);
3759
3760                 ir_node *value = expression_to_firm(initializer_value->value);
3761                 value = do_strict_conv(dbgi, value);
3762
3763                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3764                         set_value(declaration->v.value_number, value);
3765                 } else {
3766                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3767
3768                         ir_entity *entity = declaration->v.entity;
3769
3770                         if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3771                                 set_entity_variability(entity, variability_constant);
3772                         } else {
3773                                 set_entity_variability(entity, variability_initialized);
3774                         }
3775                         set_atomic_ent_value(entity, value);
3776                 }
3777         } else {
3778                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3779                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3780
3781                 ir_entity        *entity        = declaration->v.entity;
3782                 ir_initializer_t *irinitializer
3783                         = create_ir_initializer(initializer, type);
3784
3785                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3786                         set_entity_variability(entity, variability_constant);
3787                 } else {
3788                         set_entity_variability(entity, variability_initialized);
3789                 }
3790                 set_entity_initializer(entity, irinitializer);
3791         }
3792 }
3793
3794 static void create_variable_length_array(declaration_t *declaration)
3795 {
3796         /* initializers are not allowed for VLAs */
3797         assert(declaration->init.initializer == NULL);
3798
3799         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3800         declaration->v.vla_base       = NULL;
3801
3802         /* TODO: record VLA somewhere so we create the free node when we leave
3803          * it's scope */
3804 }
3805
3806 static void allocate_variable_length_array(declaration_t *declaration)
3807 {
3808         /* initializers are not allowed for VLAs */
3809         assert(declaration->init.initializer == NULL);
3810         assert(get_cur_block() != NULL);
3811
3812         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3813         type_t   *type      = declaration->type;
3814         ir_type  *el_type   = get_ir_type(type->array.element_type);
3815
3816         /* make sure size_node is calculated */
3817         get_type_size(type);
3818         ir_node  *elems = type->array.size_node;
3819         ir_node  *mem   = get_store();
3820         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3821
3822         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3823         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3824         set_store(proj_m);
3825
3826         assert(declaration->declaration_kind
3827                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3828         declaration->v.vla_base       = addr;
3829 }
3830
3831 /**
3832  * Creates a Firm local variable from a declaration.
3833  */
3834 static void create_local_variable(declaration_t *declaration)
3835 {
3836         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3837
3838         bool needs_entity = declaration->address_taken;
3839         type_t *type = skip_typeref(declaration->type);
3840
3841         /* is it a variable length array? */
3842         if (is_type_array(type) && !type->array.size_constant) {
3843                 create_variable_length_array(declaration);
3844                 return;
3845         } else if (is_type_array(type) || is_type_compound(type)) {
3846                 needs_entity = true;
3847         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3848                 needs_entity = true;
3849         }
3850
3851         if (needs_entity) {
3852                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3853                 create_declaration_entity(declaration,
3854                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3855                                           frame_type);
3856         } else {
3857                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3858                 declaration->v.value_number   = next_value_number_function;
3859                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3860                 ++next_value_number_function;
3861         }
3862 }
3863
3864 static void create_local_static_variable(declaration_t *declaration)
3865 {
3866         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3867
3868         type_t    *const type        = skip_typeref(declaration->type);
3869         ir_type   *const global_type = get_glob_type();
3870         ir_type   *const irtype      = get_ir_type(type);
3871         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3872
3873         size_t l = strlen(declaration->symbol->string);
3874         char   buf[l + sizeof(".%u")];
3875         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3876         ident     *const id = id_unique(buf);
3877
3878         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3879
3880         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3881                 set_entity_volatility(entity, volatility_is_volatile);
3882         }
3883
3884         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3885         declaration->v.entity         = entity;
3886         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3887         set_entity_variability(entity, variability_uninitialized);
3888         set_entity_visibility(entity, visibility_local);
3889         set_entity_allocation(entity, allocation_static);
3890
3891         ir_graph *const old_current_ir_graph = current_ir_graph;
3892         current_ir_graph = get_const_code_irg();
3893
3894         create_declaration_initializer(declaration);
3895
3896         assert(current_ir_graph == get_const_code_irg());
3897         current_ir_graph = old_current_ir_graph;
3898 }
3899
3900
3901
3902 static void return_statement_to_firm(return_statement_t *statement)
3903 {
3904         if (get_cur_block() == NULL)
3905                 return;
3906
3907         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3908         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3909
3910
3911         ir_node *in[1];
3912         int      in_len;
3913         if (get_method_n_ress(func_irtype) > 0) {
3914                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3915
3916                 if (statement->value != NULL) {
3917                         ir_node *node = expression_to_firm(statement->value);
3918                         node  = do_strict_conv(dbgi, node);
3919                         in[0] = node;
3920                 } else {
3921                         ir_mode *mode;
3922                         if (is_compound_type(res_type)) {
3923                                 mode = mode_P_data;
3924                         } else {
3925                                 mode = get_type_mode(res_type);
3926                         }
3927                         in[0] = new_Unknown(mode);
3928                 }
3929                 in_len = 1;
3930         } else {
3931                 /* build return_value for its side effects */
3932                 if (statement->value != NULL) {
3933                         expression_to_firm(statement->value);
3934                 }
3935                 in_len = 0;
3936         }
3937
3938         ir_node  *store = get_store();
3939         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3940
3941         ir_node *end_block = get_irg_end_block(current_ir_graph);
3942         add_immBlock_pred(end_block, ret);
3943
3944         set_cur_block(NULL);
3945 }
3946
3947 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3948 {
3949         if (get_cur_block() == NULL)
3950                 return NULL;
3951
3952         return expression_to_firm(statement->expression);
3953 }
3954
3955 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3956 {
3957         declaration_t *declaration = compound->scope.declarations;
3958         for( ; declaration != NULL; declaration = declaration->next) {
3959                 create_local_declaration(declaration);
3960         }
3961
3962         ir_node     *result    = NULL;
3963         statement_t *statement = compound->statements;
3964         for( ; statement != NULL; statement = statement->base.next) {
3965                 if (statement->base.next == NULL
3966                                 && statement->kind == STATEMENT_EXPRESSION) {
3967                         result = expression_statement_to_firm(
3968                                         &statement->expression);
3969                         break;
3970                 }
3971                 statement_to_firm(statement);
3972         }
3973
3974         return result;
3975 }
3976
3977 static void create_global_variable(declaration_t *declaration)
3978 {
3979         ir_visibility  vis;
3980         ir_type       *var_type;
3981         switch ((storage_class_tag_t)declaration->storage_class) {
3982                 case STORAGE_CLASS_STATIC:
3983                         vis = visibility_local;
3984                         goto global_var;
3985
3986                 case STORAGE_CLASS_EXTERN:
3987                         vis = visibility_external_allocated;
3988                         goto global_var;
3989
3990                 case STORAGE_CLASS_NONE:
3991                         vis = visibility_external_visible;
3992                         goto global_var;
3993
3994                 case STORAGE_CLASS_THREAD:
3995                         vis = visibility_external_visible;
3996                         goto tls_var;
3997
3998                 case STORAGE_CLASS_THREAD_EXTERN:
3999                         vis = visibility_external_allocated;
4000                         goto tls_var;
4001
4002                 case STORAGE_CLASS_THREAD_STATIC:
4003                         vis = visibility_local;
4004                         goto tls_var;
4005
4006 tls_var:
4007                         var_type = get_tls_type();
4008                         goto create_var;
4009
4010 global_var:
4011                         var_type = get_glob_type();
4012                         goto create_var;
4013
4014 create_var:
4015                         create_declaration_entity(declaration,
4016                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4017                                                   var_type);
4018                         if (!is_type_function(skip_typeref(declaration->type))) {
4019                                 set_entity_visibility(declaration->v.entity, vis);
4020                         }
4021
4022                         return;
4023
4024                 case STORAGE_CLASS_TYPEDEF:
4025                 case STORAGE_CLASS_AUTO:
4026                 case STORAGE_CLASS_REGISTER:
4027                 case STORAGE_CLASS_ENUM_ENTRY:
4028                         break;
4029         }
4030         panic("Invalid storage class for global variable");
4031 }
4032
4033 static void create_local_declaration(declaration_t *declaration)
4034 {
4035         if (declaration->namespc != NAMESPACE_NORMAL)
4036                 return;
4037         /* construct type */
4038         (void) get_ir_type(declaration->type);
4039         if (declaration->symbol == NULL) {
4040                 return;
4041         }
4042
4043         type_t *type = skip_typeref(declaration->type);
4044
4045         switch ((storage_class_tag_t) declaration->storage_class) {
4046         case STORAGE_CLASS_STATIC:
4047                 create_local_static_variable(declaration);
4048                 return;
4049         case STORAGE_CLASS_EXTERN:
4050                 create_global_variable(declaration);
4051                 create_declaration_initializer(declaration);
4052                 return;
4053         case STORAGE_CLASS_NONE:
4054         case STORAGE_CLASS_AUTO:
4055         case STORAGE_CLASS_REGISTER:
4056                 if (is_type_function(type)) {
4057                         if (declaration->init.statement != NULL) {
4058                                 panic("nested functions not supported yet");
4059                         } else {
4060                                 get_function_entity(declaration);
4061                         }
4062                 } else {
4063                         create_local_variable(declaration);
4064                 }
4065                 return;
4066         case STORAGE_CLASS_ENUM_ENTRY:
4067                 /* should already be handled */
4068                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4069                 return;
4070         case STORAGE_CLASS_TYPEDEF:
4071                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4072                 return;
4073         case STORAGE_CLASS_THREAD:
4074         case STORAGE_CLASS_THREAD_EXTERN:
4075         case STORAGE_CLASS_THREAD_STATIC:
4076                 break;
4077         }
4078         panic("invalid storage class found");
4079 }
4080
4081 static void initialize_local_declaration(declaration_t *declaration)
4082 {
4083         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4084                 return;
4085
4086         switch ((declaration_kind_t) declaration->declaration_kind) {
4087         case DECLARATION_KIND_LOCAL_VARIABLE:
4088         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4089                 create_declaration_initializer(declaration);
4090                 return;
4091
4092         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4093                 allocate_variable_length_array(declaration);
4094                 return;
4095
4096         case DECLARATION_KIND_LABEL_BLOCK:
4097         case DECLARATION_KIND_COMPOUND_MEMBER:
4098         case DECLARATION_KIND_GLOBAL_VARIABLE:
4099         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4100         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4101         case DECLARATION_KIND_FUNCTION:
4102         case DECLARATION_KIND_TYPE:
4103         case DECLARATION_KIND_ENUM_ENTRY:
4104                 return;
4105
4106         case DECLARATION_KIND_UNKNOWN:
4107                 panic("can't initialize unknwon declaration");
4108         }
4109         panic("invalid declaration kind");
4110 }
4111
4112 static void declaration_statement_to_firm(declaration_statement_t *statement)
4113 {
4114         declaration_t *declaration = statement->declarations_begin;
4115         declaration_t *end         = statement->declarations_end->next;
4116         for( ; declaration != end; declaration = declaration->next) {
4117                 if (declaration->namespc != NAMESPACE_NORMAL)
4118                         continue;
4119                 initialize_local_declaration(declaration);
4120         }
4121 }
4122
4123 static void if_statement_to_firm(if_statement_t *statement)
4124 {
4125         ir_node *cur_block = get_cur_block();
4126
4127         ir_node *fallthrough_block = NULL;
4128
4129         /* the true (blocks) */
4130         ir_node *true_block = NULL;
4131         if (statement->true_statement != NULL) {
4132                 true_block = new_immBlock();
4133                 statement_to_firm(statement->true_statement);
4134                 if (get_cur_block() != NULL) {
4135                         ir_node *jmp = new_Jmp();
4136                         if (fallthrough_block == NULL)
4137                                 fallthrough_block = new_immBlock();
4138                         add_immBlock_pred(fallthrough_block, jmp);
4139                 }
4140         }
4141
4142         /* the false (blocks) */
4143         ir_node *false_block = NULL;
4144         if (statement->false_statement != NULL) {
4145                 false_block = new_immBlock();
4146
4147                 statement_to_firm(statement->false_statement);
4148                 if (get_cur_block() != NULL) {
4149                         ir_node *jmp = new_Jmp();
4150                         if (fallthrough_block == NULL)
4151                                 fallthrough_block = new_immBlock();
4152                         add_immBlock_pred(fallthrough_block, jmp);
4153                 }
4154         }
4155
4156         /* create the condition */
4157         if (cur_block != NULL) {
4158                 if (true_block == NULL || false_block == NULL) {
4159                         if (fallthrough_block == NULL)
4160                                 fallthrough_block = new_immBlock();
4161                         if (true_block == NULL)
4162                                 true_block = fallthrough_block;
4163                         if (false_block == NULL)
4164                                 false_block = fallthrough_block;
4165                 }
4166
4167                 set_cur_block(cur_block);
4168                 create_condition_evaluation(statement->condition, true_block,
4169                                             false_block);
4170         }
4171
4172         mature_immBlock(true_block);
4173         if (false_block != fallthrough_block) {
4174                 mature_immBlock(false_block);
4175         }
4176         if (fallthrough_block != NULL) {
4177                 mature_immBlock(fallthrough_block);
4178         }
4179
4180         set_cur_block(fallthrough_block);
4181 }
4182
4183 static void while_statement_to_firm(while_statement_t *statement)
4184 {
4185         ir_node *jmp = NULL;
4186         if (get_cur_block() != NULL) {
4187                 jmp = new_Jmp();
4188         }
4189
4190         /* create the header block */
4191         ir_node *header_block = new_immBlock();
4192         if (jmp != NULL) {
4193                 add_immBlock_pred(header_block, jmp);
4194         }
4195
4196         /* the loop body */
4197         ir_node *old_continue_label = continue_label;
4198         ir_node *old_break_label    = break_label;
4199         continue_label              = header_block;
4200         break_label                 = NULL;
4201
4202         ir_node *body_block = new_immBlock();
4203         statement_to_firm(statement->body);
4204         ir_node *false_block = break_label;
4205
4206         assert(continue_label == header_block);
4207         continue_label = old_continue_label;
4208         break_label    = old_break_label;
4209
4210         if (get_cur_block() != NULL) {
4211                 jmp = new_Jmp();
4212                 add_immBlock_pred(header_block, jmp);
4213         }
4214
4215         /* shortcut for while(true) */
4216         if (is_constant_expression(statement->condition)
4217                         && fold_constant(statement->condition) != 0) {
4218                 set_cur_block(header_block);
4219                 ir_node *header_jmp = new_Jmp();
4220                 add_immBlock_pred(body_block, header_jmp);
4221
4222                 keep_alive(body_block);
4223         } else {
4224                 if (false_block == NULL) {
4225                         false_block = new_immBlock();
4226                 }
4227
4228                 /* create the condition */
4229                 set_cur_block(header_block);
4230
4231                 create_condition_evaluation(statement->condition, body_block,
4232                                             false_block);
4233         }
4234
4235         mature_immBlock(body_block);
4236         mature_immBlock(header_block);
4237         if (false_block != NULL) {
4238                 mature_immBlock(false_block);
4239         }
4240
4241         set_cur_block(false_block);
4242 }
4243
4244 static void do_while_statement_to_firm(do_while_statement_t *statement)
4245 {
4246         ir_node *jmp = NULL;
4247         if (get_cur_block() != NULL) {
4248                 jmp = new_Jmp();
4249         }
4250
4251         /* create the header block */
4252         ir_node *header_block = new_immBlock();
4253
4254         /* the loop body */
4255         ir_node *body_block = new_immBlock();
4256         if (jmp != NULL) {
4257                 add_immBlock_pred(body_block, jmp);
4258         }
4259
4260         ir_node *old_continue_label = continue_label;
4261         ir_node *old_break_label    = break_label;
4262         continue_label              = header_block;
4263         break_label                 = NULL;
4264
4265         statement_to_firm(statement->body);
4266         ir_node *false_block = break_label;
4267
4268         assert(continue_label == header_block);
4269         continue_label = old_continue_label;
4270         break_label    = old_break_label;
4271
4272         if (get_cur_block() != NULL) {
4273                 ir_node *body_jmp = new_Jmp();
4274                 add_immBlock_pred(header_block, body_jmp);
4275                 mature_immBlock(header_block);
4276         }
4277
4278         if (false_block == NULL) {
4279                 false_block = new_immBlock();
4280         }
4281
4282         /* create the condition */
4283         set_cur_block(header_block);
4284
4285         create_condition_evaluation(statement->condition, body_block, false_block);
4286         mature_immBlock(body_block);
4287         mature_immBlock(header_block);
4288         if (false_block != NULL) {
4289                 mature_immBlock(false_block);
4290         }
4291
4292         set_cur_block(false_block);
4293 }
4294
4295 static void for_statement_to_firm(for_statement_t *statement)
4296 {
4297         ir_node *jmp = NULL;
4298
4299         /* create declarations */
4300         declaration_t *declaration = statement->scope.declarations;
4301         for( ; declaration != NULL; declaration = declaration->next) {
4302                 create_local_declaration(declaration);
4303         }
4304         declaration = statement->scope.declarations;
4305         for( ; declaration != NULL; declaration = declaration->next) {
4306                 initialize_local_declaration(declaration);
4307         }
4308
4309         if (get_cur_block() != NULL) {
4310                 if (statement->initialisation != NULL) {
4311                         expression_to_firm(statement->initialisation);
4312                 }
4313
4314                 jmp = new_Jmp();
4315         }
4316
4317
4318         /* create the step block */
4319         ir_node *const step_block = new_immBlock();
4320         if (statement->step != NULL) {
4321                 expression_to_firm(statement->step);
4322         }
4323         ir_node *const step_jmp = new_Jmp();
4324
4325         /* create the header block */
4326         ir_node *const header_block = new_immBlock();
4327         if (jmp != NULL) {
4328                 add_immBlock_pred(header_block, jmp);
4329         }
4330         add_immBlock_pred(header_block, step_jmp);
4331
4332         /* the false block */
4333         ir_node *const false_block = new_immBlock();
4334
4335         /* the loop body */
4336         ir_node * body_block;
4337         if (statement->body != NULL) {
4338                 ir_node *const old_continue_label = continue_label;
4339                 ir_node *const old_break_label    = break_label;
4340                 continue_label = step_block;
4341                 break_label    = false_block;
4342
4343                 body_block = new_immBlock();
4344                 statement_to_firm(statement->body);
4345
4346                 assert(continue_label == step_block);
4347                 assert(break_label    == false_block);
4348                 continue_label = old_continue_label;
4349                 break_label    = old_break_label;
4350
4351                 if (get_cur_block() != NULL) {
4352                         jmp = new_Jmp();
4353                         add_immBlock_pred(step_block, jmp);
4354                 }
4355         } else {
4356                 body_block = step_block;
4357         }
4358
4359         /* create the condition */
4360         set_cur_block(header_block);
4361         if (statement->condition != NULL) {
4362                 create_condition_evaluation(statement->condition, body_block,
4363                                             false_block);
4364         } else {
4365                 keep_alive(header_block);
4366                 jmp = new_Jmp();
4367                 add_immBlock_pred(body_block, jmp);
4368         }
4369
4370         mature_immBlock(body_block);
4371         mature_immBlock(false_block);
4372         mature_immBlock(step_block);
4373         mature_immBlock(header_block);
4374         mature_immBlock(false_block);
4375
4376         set_cur_block(false_block);
4377 }
4378
4379 static void create_jump_statement(const statement_t *statement,
4380                                   ir_node *target_block)
4381 {
4382         if (get_cur_block() == NULL)
4383                 return;
4384
4385         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4386         ir_node  *jump = new_d_Jmp(dbgi);
4387         add_immBlock_pred(target_block, jump);
4388
4389         set_cur_block(NULL);
4390 }
4391
4392 static ir_node *get_break_label(void)
4393 {
4394         if (break_label == NULL) {
4395                 ir_node *cur_block = get_cur_block();
4396                 break_label = new_immBlock();
4397                 set_cur_block(cur_block);
4398         }
4399         return break_label;
4400 }
4401
4402 static void switch_statement_to_firm(switch_statement_t *statement)
4403 {
4404         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4405
4406         ir_node *expression  = expression_to_firm(statement->expression);
4407         ir_node *cond        = new_d_Cond(dbgi, expression);
4408
4409         set_cur_block(NULL);
4410
4411         ir_node *const old_switch_cond       = current_switch_cond;
4412         ir_node *const old_break_label       = break_label;
4413         const bool     old_saw_default_label = saw_default_label;
4414         saw_default_label                    = false;
4415         current_switch_cond                  = cond;
4416         break_label                          = NULL;
4417         switch_statement_t *const old_switch = current_switch;
4418         current_switch                       = statement;
4419
4420         /* determine a free number for the default label */
4421         unsigned long num_cases = 0;
4422         long def_nr = 0;
4423         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4424                 if (l->expression == NULL) {
4425                         /* default case */
4426                         continue;
4427                 }
4428                 for (long cns = l->first_case; cns <= l->last_case; ++cns)
4429                         ++num_cases;
4430                 if (l->last_case > def_nr)
4431                         def_nr = l->last_case;
4432         }
4433
4434         if (def_nr + 1 < 0) {
4435                 /* Bad: an overflow occurred, we cannot be sure that the
4436          * maximum + 1 is a free number. Scan the values a second
4437          * time to find a free number.
4438          */
4439                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4440                 unsigned long i;
4441
4442                 memset(bits, 0, (num_cases + 7) >> 3);
4443                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4444                         if (l->expression == NULL) {
4445                                 /* default case */
4446                                 continue;
4447                         }
4448                         for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4449                                 if (cns >= 0 && (unsigned long)cns < num_cases)
4450                                         bits[cns >> 3] |= (1 << (cns & 7));
4451                         }
4452                 }
4453                 /* We look at the first num_cases constants:
4454                  * Either they are densed, so we took the last (num_cases)
4455                  * one, or they are non densed, so we will find one free
4456                  * there...
4457                  */
4458                 for (i = 0; i < num_cases; ++i)
4459                         if ((bits[i >> 3] & (i & 7)) == 0)
4460                                 break;
4461
4462                 free(bits);
4463                 def_nr = i;
4464         } else {
4465                 ++def_nr;
4466         }
4467         statement->default_proj_nr = def_nr;
4468
4469         if (statement->body != NULL) {
4470                 statement_to_firm(statement->body);
4471         }
4472
4473         if (get_cur_block() != NULL) {
4474                 ir_node *jmp = new_Jmp();
4475                 add_immBlock_pred(get_break_label(), jmp);
4476         }
4477
4478         if (!saw_default_label) {
4479                 set_cur_block(get_nodes_block(cond));
4480                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4481                                                         statement->default_proj_nr);
4482                 add_immBlock_pred(get_break_label(), proj);
4483         }
4484
4485         if (break_label != NULL) {
4486                 mature_immBlock(break_label);
4487         }
4488         set_cur_block(break_label);
4489
4490         assert(current_switch_cond == cond);
4491         current_switch      = old_switch;
4492         current_switch_cond = old_switch_cond;
4493         break_label         = old_break_label;
4494         saw_default_label   = old_saw_default_label;
4495 }
4496
4497 static void case_label_to_firm(const case_label_statement_t *statement)
4498 {
4499         if (statement->is_empty)
4500                 return;
4501
4502         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4503
4504         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4505
4506         ir_node *proj;
4507         ir_node *old_block = get_nodes_block(current_switch_cond);
4508         ir_node *block     = new_immBlock();
4509
4510         set_cur_block(old_block);
4511         if (statement->expression != NULL) {
4512                 long start_pn = statement->first_case;
4513                 long end_pn   = statement->last_case;
4514                 assert(start_pn <= end_pn);
4515                 /* create jumps for all cases in the given range */
4516                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4517                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4518                         add_immBlock_pred(block, proj);
4519                 }
4520         } else {
4521                 saw_default_label = true;
4522                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4523                                          current_switch->default_proj_nr);
4524
4525                 add_immBlock_pred(block, proj);
4526         }
4527
4528         if (fallthrough != NULL) {
4529                 add_immBlock_pred(block, fallthrough);
4530         }
4531         mature_immBlock(block);
4532         set_cur_block(block);
4533
4534         if (statement->statement != NULL) {
4535                 statement_to_firm(statement->statement);
4536         }
4537 }
4538
4539 static ir_node *get_label_block(declaration_t *label)
4540 {
4541         assert(label->namespc == NAMESPACE_LABEL);
4542
4543         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4544                 return label->v.block;
4545         }
4546         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4547
4548         ir_node *old_cur_block = get_cur_block();
4549         ir_node *block         = new_immBlock();
4550         set_cur_block(old_cur_block);
4551
4552         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4553         label->v.block          = block;
4554
4555         ARR_APP1(ir_node *, imature_blocks, block);
4556
4557         return block;
4558 }
4559
4560 static void label_to_firm(const label_statement_t *statement)
4561 {
4562         ir_node *block = get_label_block(statement->label);
4563
4564         if (get_cur_block() != NULL) {
4565                 ir_node *jmp = new_Jmp();
4566                 add_immBlock_pred(block, jmp);
4567         }
4568
4569         set_cur_block(block);
4570         keep_alive(block);
4571
4572         if (statement->statement != NULL) {
4573                 statement_to_firm(statement->statement);
4574         }
4575 }
4576
4577 static void goto_to_firm(const goto_statement_t *statement)
4578 {
4579         if (get_cur_block() == NULL)
4580                 return;
4581
4582         ir_node *block = get_label_block(statement->label);
4583         ir_node *jmp   = new_Jmp();
4584         add_immBlock_pred(block, jmp);
4585
4586         set_cur_block(NULL);
4587 }
4588
4589 static void asm_statement_to_firm(const asm_statement_t *statement)
4590 {
4591         bool needs_memory = false;
4592
4593         if (statement->is_volatile) {
4594                 needs_memory = true;
4595         }
4596
4597         size_t         n_clobbers = 0;
4598         asm_clobber_t *clobber    = statement->clobbers;
4599         for( ; clobber != NULL; clobber = clobber->next) {
4600                 const char *clobber_str = clobber->clobber.begin;
4601
4602                 if (!be_is_valid_clobber(clobber_str)) {
4603                         errorf(&statement->base.source_position,
4604                                    "invalid clobber '%s' specified", clobber->clobber);
4605                         continue;
4606                 }
4607
4608                 if (strcmp(clobber_str, "memory") == 0) {
4609                         needs_memory = true;
4610                         continue;
4611                 }
4612
4613                 ident *id = new_id_from_str(clobber_str);
4614                 obstack_ptr_grow(&asm_obst, id);
4615                 ++n_clobbers;
4616         }
4617         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4618         ident **clobbers = NULL;
4619         if (n_clobbers > 0) {
4620                 clobbers = obstack_finish(&asm_obst);
4621         }
4622
4623         size_t n_inputs  = 0;
4624         asm_argument_t *argument = statement->inputs;
4625         for ( ; argument != NULL; argument = argument->next)
4626                 n_inputs++;
4627         size_t n_outputs = 0;
4628         argument = statement->outputs;
4629         for ( ; argument != NULL; argument = argument->next)
4630                 n_outputs++;
4631
4632         unsigned next_pos = 0;
4633
4634         ir_node *ins[n_inputs + n_outputs + 1];
4635         size_t   in_size = 0;
4636
4637         ir_asm_constraint tmp_in_constraints[n_outputs];
4638
4639         const expression_t *out_exprs[n_outputs];
4640         ir_node            *out_addrs[n_outputs];
4641         size_t              out_size = 0;
4642
4643         argument = statement->outputs;
4644         for ( ; argument != NULL; argument = argument->next) {
4645                 const char *constraints = argument->constraints.begin;
4646                 asm_constraint_flags_t asm_flags
4647                         = be_parse_asm_constraints(constraints);
4648
4649                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4650                         errorf(&statement->base.source_position,
4651                                "some constraints in '%s' are not supported", constraints);
4652                         continue;
4653                 }
4654                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4655                         errorf(&statement->base.source_position,
4656                                "some constraints in '%s' are invalid", constraints);
4657                         continue;
4658                 }
4659                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4660                         errorf(&statement->base.source_position,
4661                                "no write flag specified for output constraints '%s'",
4662                                constraints);
4663                         continue;
4664                 }
4665
4666                 unsigned pos = next_pos++;
4667                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4668                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4669                         expression_t *expr = argument->expression;
4670                         ir_node      *addr = expression_to_addr(expr);
4671                         /* in+output, construct an artifical same_as constraint on the
4672                          * input */
4673                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4674                                 char     buf[64];
4675                                 ir_node *value = get_value_from_lvalue(expr, addr);
4676
4677                                 snprintf(buf, sizeof(buf), "%d", pos);
4678
4679                                 ir_asm_constraint constraint;
4680                                 constraint.pos              = pos;
4681                                 constraint.constraint       = new_id_from_str(buf);
4682                                 constraint.mode             = get_ir_mode(expr->base.type);
4683                                 tmp_in_constraints[in_size] = constraint;
4684                                 ins[in_size] = value;
4685
4686                                 ++in_size;
4687                         }
4688
4689                         out_exprs[out_size] = expr;
4690                         out_addrs[out_size] = addr;
4691                         ++out_size;
4692                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4693                         /* pure memory ops need no input (but we have to make sure we
4694                          * attach to the memory) */
4695                         assert(! (asm_flags &
4696                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4697                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4698                         needs_memory = true;
4699
4700                         /* we need to attach the address to the inputs */
4701                         expression_t *expr = argument->expression;
4702
4703                         ir_asm_constraint constraint;
4704                         constraint.pos              = pos;
4705                         constraint.constraint       = new_id_from_str(constraints);
4706                         constraint.mode             = NULL;
4707                         tmp_in_constraints[in_size] = constraint;
4708
4709                         ins[in_size]          = expression_to_addr(expr);
4710                         ++in_size;
4711                         continue;
4712                 } else {
4713                         errorf(&statement->base.source_position,
4714                                "only modifiers but no place set in constraints '%s'",
4715                                constraints);
4716                         continue;
4717                 }
4718
4719                 ir_asm_constraint constraint;
4720                 constraint.pos        = pos;
4721                 constraint.constraint = new_id_from_str(constraints);
4722                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4723
4724                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4725         }
4726         assert(obstack_object_size(&asm_obst)
4727                         == out_size * sizeof(ir_asm_constraint));
4728         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4729
4730
4731         obstack_grow(&asm_obst, tmp_in_constraints,
4732                      in_size * sizeof(tmp_in_constraints[0]));
4733         /* find and count input and output arguments */
4734         argument = statement->inputs;
4735         for( ; argument != NULL; argument = argument->next) {
4736                 const char *constraints = argument->constraints.begin;
4737                 asm_constraint_flags_t asm_flags
4738                         = be_parse_asm_constraints(constraints);
4739
4740                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4741                         errorf(&statement->base.source_position,
4742                                "some constraints in '%s' are not supported", constraints);
4743                         continue;
4744                 }
4745                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4746                         errorf(&statement->base.source_position,
4747                                "some constraints in '%s' are invalid", constraints);
4748                         continue;
4749                 }
4750                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4751                         errorf(&statement->base.source_position,
4752                                "write flag specified for input constraints '%s'",
4753                                constraints);
4754                         continue;
4755                 }
4756
4757                 ir_node *input;
4758                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4759                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4760                         /* we can treat this as "normal" input */
4761                         input = expression_to_firm(argument->expression);
4762                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4763                         /* pure memory ops need no input (but we have to make sure we
4764                          * attach to the memory) */
4765                         assert(! (asm_flags &
4766                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4767                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4768                         needs_memory = true;
4769                         input = expression_to_addr(argument->expression);
4770                 } else {
4771                         errorf(&statement->base.source_position,
4772                                "only modifiers but no place set in constraints '%s'",
4773                                constraints);
4774                         continue;
4775                 }
4776
4777                 ir_asm_constraint constraint;
4778                 constraint.pos        = next_pos++;
4779                 constraint.constraint = new_id_from_str(constraints);
4780                 constraint.mode       = get_irn_mode(input);
4781
4782                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4783                 ins[in_size++] = input;
4784         }
4785
4786         if (needs_memory) {
4787                 ir_asm_constraint constraint;
4788                 constraint.pos        = next_pos++;
4789                 constraint.constraint = new_id_from_str("");
4790                 constraint.mode       = mode_M;
4791
4792                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4793                 ins[in_size++] = get_store();
4794         }
4795
4796         assert(obstack_object_size(&asm_obst)
4797                         == in_size * sizeof(ir_asm_constraint));
4798         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4799
4800         /* create asm node */
4801         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4802
4803         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4804
4805         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4806                                   out_size, output_constraints,
4807                                   n_clobbers, clobbers, asm_text);
4808
4809         if (statement->is_volatile) {
4810                 set_irn_pinned(node, op_pin_state_pinned);
4811         } else {
4812                 set_irn_pinned(node, op_pin_state_floats);
4813         }
4814
4815         /* create output projs & connect them */
4816         if (needs_memory) {
4817                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4818                 set_store(projm);
4819         }
4820
4821         size_t i;
4822         for (i = 0; i < out_size; ++i) {
4823                 const expression_t *out_expr = out_exprs[i];
4824                 long                pn       = i;
4825                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4826                 ir_node            *proj     = new_Proj(node, mode, pn);
4827                 ir_node            *addr     = out_addrs[i];
4828
4829                 set_value_for_expression_addr(out_expr, proj, addr);
4830         }
4831 }
4832
4833 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4834         statement_to_firm(statement->try_statement);
4835         warningf(&statement->base.source_position, "structured exception handling ignored");
4836 }
4837
4838 static void     leave_statement_to_firm(leave_statement_t *statement) {
4839         errorf(&statement->base.source_position, "__leave not supported yet");
4840 }
4841
4842 /**
4843  * Transform a statement.
4844  */
4845 static void statement_to_firm(statement_t *statement)
4846 {
4847 #ifndef NDEBUG
4848         assert(!statement->base.transformed);
4849         statement->base.transformed = true;
4850 #endif
4851
4852         switch(statement->kind) {
4853         case STATEMENT_INVALID:
4854                 panic("invalid statement found");
4855                 return;
4856         case STATEMENT_EMPTY:
4857                 /* nothing */
4858                 return;
4859         case STATEMENT_COMPOUND:
4860                 compound_statement_to_firm(&statement->compound);
4861                 return;
4862         case STATEMENT_RETURN:
4863                 return_statement_to_firm(&statement->returns);
4864                 return;
4865         case STATEMENT_EXPRESSION:
4866                 expression_statement_to_firm(&statement->expression);
4867                 return;
4868         case STATEMENT_IF:
4869                 if_statement_to_firm(&statement->ifs);
4870                 return;
4871         case STATEMENT_WHILE:
4872                 while_statement_to_firm(&statement->whiles);
4873                 return;
4874         case STATEMENT_DO_WHILE:
4875                 do_while_statement_to_firm(&statement->do_while);
4876                 return;
4877         case STATEMENT_DECLARATION:
4878                 declaration_statement_to_firm(&statement->declaration);
4879                 return;
4880         case STATEMENT_BREAK:
4881                 create_jump_statement(statement, get_break_label());
4882                 return;
4883         case STATEMENT_CONTINUE:
4884                 create_jump_statement(statement, continue_label);
4885                 return;
4886         case STATEMENT_SWITCH:
4887                 switch_statement_to_firm(&statement->switchs);
4888                 return;
4889         case STATEMENT_CASE_LABEL:
4890                 case_label_to_firm(&statement->case_label);
4891                 return;
4892         case STATEMENT_FOR:
4893                 for_statement_to_firm(&statement->fors);
4894                 return;
4895         case STATEMENT_LABEL:
4896                 label_to_firm(&statement->label);
4897                 return;
4898         case STATEMENT_GOTO:
4899                 goto_to_firm(&statement->gotos);
4900                 return;
4901         case STATEMENT_ASM:
4902                 asm_statement_to_firm(&statement->asms);
4903                 return;
4904         case STATEMENT_MS_TRY:
4905                 ms_try_statement_to_firm(&statement->ms_try);
4906                 return;
4907         case STATEMENT_LEAVE:
4908                 leave_statement_to_firm(&statement->leave);
4909                 return;
4910         }
4911         panic("Statement not implemented\n");
4912 }
4913
4914 static int count_decls_in_expression(const expression_t *expression);
4915
4916 static int count_local_declarations(const declaration_t *      decl,
4917                                     const declaration_t *const end)
4918 {
4919         int count = 0;
4920         for (; decl != end; decl = decl->next) {
4921                 if (decl->namespc != NAMESPACE_NORMAL)
4922                         continue;
4923                 type_t *type = skip_typeref(decl->type);
4924
4925                 if (!decl->address_taken && is_type_scalar(type))
4926                         ++count;
4927                 const initializer_t *initializer = decl->init.initializer;
4928                 /* FIXME: should walk initializer hierarchies... */
4929                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4930                         count += count_decls_in_expression(initializer->value.value);
4931                 }
4932         }
4933         return count;
4934 }
4935
4936 static int count_decls_in_expression(const expression_t *expression) {
4937         int count = 0;
4938
4939         if (expression == NULL)
4940                 return 0;
4941
4942         switch((expression_kind_t) expression->base.kind) {
4943         case EXPR_STATEMENT:
4944                 return count_decls_in_stmts(expression->statement.statement);
4945         EXPR_BINARY_CASES {
4946                 int count_left  = count_decls_in_expression(expression->binary.left);
4947                 int count_right = count_decls_in_expression(expression->binary.right);
4948                 return count_left + count_right;
4949         }
4950         EXPR_UNARY_CASES
4951                 return count_decls_in_expression(expression->unary.value);
4952         case EXPR_CALL: {
4953                 call_argument_t *argument = expression->call.arguments;
4954                 for( ; argument != NULL; argument = argument->next) {
4955                         count += count_decls_in_expression(argument->expression);
4956                 }
4957                 return count;
4958         }
4959
4960         case EXPR_UNKNOWN:
4961         case EXPR_INVALID:
4962                 panic("unexpected expression kind");
4963
4964         case EXPR_COMPOUND_LITERAL:
4965                 /* TODO... */
4966                 break;
4967
4968         case EXPR_CONDITIONAL:
4969                 count += count_decls_in_expression(expression->conditional.condition);
4970                 count += count_decls_in_expression(expression->conditional.true_expression);
4971                 count += count_decls_in_expression(expression->conditional.false_expression);
4972                 return count;
4973
4974         case EXPR_BUILTIN_PREFETCH:
4975                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4976                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4977                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4978                 return count;
4979
4980         case EXPR_BUILTIN_CONSTANT_P:
4981                 count += count_decls_in_expression(expression->builtin_constant.value);
4982                 return count;
4983
4984         case EXPR_SELECT:
4985                 count += count_decls_in_expression(expression->select.compound);
4986                 return count;
4987
4988         case EXPR_ARRAY_ACCESS:
4989                 count += count_decls_in_expression(expression->array_access.array_ref);
4990                 count += count_decls_in_expression(expression->array_access.index);
4991                 return count;
4992
4993         case EXPR_CLASSIFY_TYPE:
4994                 count += count_decls_in_expression(expression->classify_type.type_expression);
4995                 return count;
4996
4997         case EXPR_SIZEOF:
4998         case EXPR_ALIGNOF: {
4999                 expression_t *tp_expression = expression->typeprop.tp_expression;
5000                 if (tp_expression != NULL) {
5001                         count += count_decls_in_expression(tp_expression);
5002                 }
5003                 return count;
5004         }
5005
5006         case EXPR_OFFSETOF:
5007         case EXPR_REFERENCE:
5008         case EXPR_CONST:
5009         case EXPR_CHARACTER_CONSTANT:
5010         case EXPR_WIDE_CHARACTER_CONSTANT:
5011         case EXPR_STRING_LITERAL:
5012         case EXPR_WIDE_STRING_LITERAL:
5013         case EXPR_FUNCNAME:
5014         case EXPR_BUILTIN_SYMBOL:
5015         case EXPR_VA_START:
5016         case EXPR_VA_ARG:
5017                 break;
5018         }
5019
5020         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5021          * (or implement all the missing expressions here/implement a walker)
5022          */
5023
5024         return 0;
5025 }
5026
5027 static int count_decls_in_stmts(const statement_t *stmt)
5028 {
5029         int count = 0;
5030         for (; stmt != NULL; stmt = stmt->base.next) {
5031                 switch (stmt->kind) {
5032                         case STATEMENT_EMPTY:
5033                                 break;
5034
5035                         case STATEMENT_DECLARATION: {
5036                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5037                                 count += count_local_declarations(decl_stmt->declarations_begin,
5038                                                                   decl_stmt->declarations_end->next);
5039                                 break;
5040                         }
5041
5042                         case STATEMENT_COMPOUND: {
5043                                 const compound_statement_t *const comp =
5044                                         &stmt->compound;
5045                                 count += count_decls_in_stmts(comp->statements);
5046                                 break;
5047                         }
5048
5049                         case STATEMENT_IF: {
5050                                 const if_statement_t *const if_stmt = &stmt->ifs;
5051                                 count += count_decls_in_expression(if_stmt->condition);
5052                                 count += count_decls_in_stmts(if_stmt->true_statement);
5053                                 count += count_decls_in_stmts(if_stmt->false_statement);
5054                                 break;
5055                         }
5056
5057                         case STATEMENT_SWITCH: {
5058                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5059                                 count += count_decls_in_expression(switch_stmt->expression);
5060                                 count += count_decls_in_stmts(switch_stmt->body);
5061                                 break;
5062                         }
5063
5064                         case STATEMENT_LABEL: {
5065                                 const label_statement_t *const label_stmt = &stmt->label;
5066                                 if (label_stmt->statement != NULL) {
5067                                         count += count_decls_in_stmts(label_stmt->statement);
5068                                 }
5069                                 break;
5070                         }
5071
5072                         case STATEMENT_WHILE: {
5073                                 const while_statement_t *const while_stmt = &stmt->whiles;
5074                                 count += count_decls_in_expression(while_stmt->condition);
5075                                 count += count_decls_in_stmts(while_stmt->body);
5076                                 break;
5077                         }
5078
5079                         case STATEMENT_DO_WHILE: {
5080                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5081                                 count += count_decls_in_expression(do_while_stmt->condition);
5082                                 count += count_decls_in_stmts(do_while_stmt->body);
5083                                 break;
5084                         }
5085
5086                         case STATEMENT_FOR: {
5087                                 const for_statement_t *const for_stmt = &stmt->fors;
5088                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5089                                 count += count_decls_in_expression(for_stmt->initialisation);
5090                                 count += count_decls_in_expression(for_stmt->condition);
5091                                 count += count_decls_in_expression(for_stmt->step);
5092                                 count += count_decls_in_stmts(for_stmt->body);
5093                                 break;
5094                         }
5095
5096                         case STATEMENT_CASE_LABEL: {
5097                                 const case_label_statement_t *label = &stmt->case_label;
5098                                 count += count_decls_in_expression(label->expression);
5099                                 if (label->statement != NULL) {
5100                                         count += count_decls_in_stmts(label->statement);
5101                                 }
5102                                 break;
5103                         }
5104
5105                         case STATEMENT_ASM:
5106                         case STATEMENT_BREAK:
5107                         case STATEMENT_CONTINUE:
5108                                 break;
5109
5110                         case STATEMENT_EXPRESSION: {
5111                                 const expression_statement_t *expr_stmt = &stmt->expression;
5112                                 count += count_decls_in_expression(expr_stmt->expression);
5113                                 break;
5114                         }
5115
5116                         case STATEMENT_GOTO:
5117                         case STATEMENT_LEAVE:
5118                         case STATEMENT_INVALID:
5119                                 break;
5120
5121                         case STATEMENT_RETURN: {
5122                                 const return_statement_t *ret_stmt = &stmt->returns;
5123                                 count += count_decls_in_expression(ret_stmt->value);
5124                                 break;
5125                         }
5126
5127                         case STATEMENT_MS_TRY: {
5128                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5129                                 count += count_decls_in_stmts(try_stmt->try_statement);
5130                                 if (try_stmt->except_expression != NULL)
5131                                         count += count_decls_in_expression(try_stmt->except_expression);
5132                                 count += count_decls_in_stmts(try_stmt->final_statement);
5133                                 break;
5134                         }
5135                 }
5136         }
5137         return count;
5138 }
5139
5140 static int get_function_n_local_vars(declaration_t *declaration)
5141 {
5142         int count = 0;
5143
5144         /* count parameters */
5145         count += count_local_declarations(declaration->scope.declarations, NULL);
5146
5147         /* count local variables declared in body */
5148         count += count_decls_in_stmts(declaration->init.statement);
5149
5150         return count;
5151 }
5152
5153 static void initialize_function_parameters(declaration_t *declaration)
5154 {
5155         ir_graph        *irg             = current_ir_graph;
5156         ir_node         *args            = get_irg_args(irg);
5157         ir_node         *start_block     = get_irg_start_block(irg);
5158         ir_type         *function_irtype = get_ir_type(declaration->type);
5159
5160         int            n         = 0;
5161         declaration_t *parameter = declaration->scope.declarations;
5162         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5163                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5164                 type_t *type = skip_typeref(parameter->type);
5165
5166                 bool needs_entity = parameter->address_taken;
5167                 assert(!is_type_array(type));
5168                 if (is_type_compound(type)) {
5169                         needs_entity = true;
5170                 }
5171
5172                 if (needs_entity) {
5173                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5174                         ident     *id     = new_id_from_str(parameter->symbol->string);
5175                         set_entity_ident(entity, id);
5176
5177                         parameter->declaration_kind
5178                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5179                         parameter->v.entity = entity;
5180                         continue;
5181                 }
5182
5183                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5184                 ir_mode *param_mode   = get_type_mode(param_irtype);
5185
5186                 long     pn    = n;
5187                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5188
5189                 ir_mode *mode = get_ir_mode(type);
5190                 value = create_conv(NULL, value, mode);
5191                 value = do_strict_conv(NULL, value);
5192
5193                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5194                 parameter->v.value_number   = next_value_number_function;
5195                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5196                 ++next_value_number_function;
5197
5198                 set_value(parameter->v.value_number, value);
5199         }
5200 }
5201
5202 /**
5203  * Handle additional decl modifiers for IR-graphs
5204  *
5205  * @param irg            the IR-graph
5206  * @param dec_modifiers  additional modifiers
5207  */
5208 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5209 {
5210         if (decl_modifiers & DM_NORETURN) {
5211                 /* TRUE if the declaration includes the Microsoft
5212                    __declspec(noreturn) specifier. */
5213                 set_irg_additional_property(irg, mtp_property_noreturn);
5214         }
5215         if (decl_modifiers & DM_NOTHROW) {
5216                 /* TRUE if the declaration includes the Microsoft
5217                    __declspec(nothrow) specifier. */
5218                 set_irg_additional_property(irg, mtp_property_nothrow);
5219         }
5220         if (decl_modifiers & DM_NAKED) {
5221                 /* TRUE if the declaration includes the Microsoft
5222                    __declspec(naked) specifier. */
5223                 set_irg_additional_property(irg, mtp_property_naked);
5224         }
5225         if (decl_modifiers & DM_FORCEINLINE) {
5226                 /* TRUE if the declaration includes the
5227                    Microsoft __forceinline specifier. */
5228                 set_irg_inline_property(irg, irg_inline_forced);
5229         }
5230         if (decl_modifiers & DM_NOINLINE) {
5231                 /* TRUE if the declaration includes the Microsoft
5232                    __declspec(noinline) specifier. */
5233                 set_irg_inline_property(irg, irg_inline_forbidden);
5234         }
5235 }
5236
5237 static void add_function_pointer(ir_type *segment, ir_entity *method,
5238                                  const char *unique_template)
5239 {
5240         ir_type   *method_type  = get_entity_type(method);
5241         ident     *id           = id_unique(unique_template);
5242         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5243
5244         ident     *ide          = id_unique(unique_template);
5245         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5246         ir_graph  *irg          = get_const_code_irg();
5247         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5248                                                            method, NULL);
5249
5250         set_entity_compiler_generated(ptr, 1);
5251         set_entity_variability(ptr, variability_constant);
5252         set_atomic_ent_value(ptr, val);
5253 }
5254
5255 /**
5256  * Create code for a function.
5257  */
5258 static void create_function(declaration_t *declaration)
5259 {
5260         ir_entity *function_entity = get_function_entity(declaration);
5261
5262         if (declaration->init.statement == NULL)
5263                 return;
5264
5265         if (declaration->modifiers & DM_CONSTRUCTOR) {
5266                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5267                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5268         }
5269         if (declaration->modifiers & DM_DESTRUCTOR) {
5270                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5271                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5272         }
5273
5274         current_function_decl = declaration;
5275         current_function_name = NULL;
5276         current_funcsig       = NULL;
5277
5278         assert(imature_blocks == NULL);
5279         imature_blocks = NEW_ARR_F(ir_node*, 0);
5280
5281         int       n_local_vars = get_function_n_local_vars(declaration);
5282         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5283
5284         set_irg_fp_model(irg, firm_opt.fp_model);
5285         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5286         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5287
5288         ir_node *first_block = get_cur_block();
5289
5290         /* set inline flags */
5291         if (declaration->is_inline)
5292                 set_irg_inline_property(irg, irg_inline_recomended);
5293         handle_decl_modifier_irg(irg, declaration->modifiers);
5294
5295         next_value_number_function = 0;
5296         initialize_function_parameters(declaration);
5297
5298         statement_to_firm(declaration->init.statement);
5299
5300         ir_node *end_block = get_irg_end_block(irg);
5301
5302         /* do we have a return statement yet? */
5303         if (get_cur_block() != NULL) {
5304                 type_t *type = skip_typeref(declaration->type);
5305                 assert(is_type_function(type));
5306                 const function_type_t *func_type   = &type->function;
5307                 const type_t          *return_type
5308                         = skip_typeref(func_type->return_type);
5309
5310                 ir_node *ret;
5311                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5312                         ret = new_Return(get_store(), 0, NULL);
5313                 } else {
5314                         ir_mode *mode;
5315                         if (is_type_scalar(return_type)) {
5316                                 mode = get_ir_mode(func_type->return_type);
5317                         } else {
5318                                 mode = mode_P_data;
5319                         }
5320
5321                         ir_node *in[1];
5322                         /* §5.1.2.2.3 main implicitly returns 0 */
5323                         if (strcmp(declaration->symbol->string, "main") == 0) {
5324                                 in[0] = new_Const(mode, get_mode_null(mode));
5325                         } else {
5326                                 in[0] = new_Unknown(mode);
5327                         }
5328                         ret = new_Return(get_store(), 1, in);
5329                 }
5330                 add_immBlock_pred(end_block, ret);
5331         }
5332
5333         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
5334                 mature_immBlock(imature_blocks[i]);
5335         }
5336         DEL_ARR_F(imature_blocks);
5337         imature_blocks = NULL;
5338
5339         mature_immBlock(first_block);
5340         mature_immBlock(end_block);
5341
5342         irg_finalize_cons(irg);
5343
5344         /* finalize the frame type */
5345         ir_type *frame_type = get_irg_frame_type(irg);
5346         int      n          = get_compound_n_members(frame_type);
5347         int      align_all  = 4;
5348         int      offset     = 0;
5349         for(int i = 0; i < n; ++i) {
5350                 ir_entity *entity      = get_compound_member(frame_type, i);
5351                 ir_type   *entity_type = get_entity_type(entity);
5352
5353                 int align = get_type_alignment_bytes(entity_type);
5354                 if (align > align_all)
5355                         align_all = align;
5356                 int misalign = 0;
5357                 if (align > 0) {
5358                         misalign  = offset % align;
5359                         if (misalign > 0) {
5360                                 offset += align - misalign;
5361                         }
5362                 }
5363
5364                 set_entity_offset(entity, offset);
5365                 offset += get_type_size_bytes(entity_type);
5366         }
5367         set_type_size_bytes(frame_type, offset);
5368         set_type_alignment_bytes(frame_type, align_all);
5369
5370         irg_vrfy(irg);
5371 }
5372
5373 static void scope_to_firm(scope_t *scope)
5374 {
5375         /* first pass: create declarations */
5376         declaration_t *declaration = scope->declarations;
5377         for( ; declaration != NULL; declaration = declaration->next) {
5378                 if (declaration->namespc != NAMESPACE_NORMAL)
5379                         continue;
5380                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5381                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5382                         continue;
5383                 if (declaration->symbol == NULL)
5384                         continue;
5385
5386                 type_t *type = skip_typeref(declaration->type);
5387                 if (is_type_function(type)) {
5388                         get_function_entity(declaration);
5389                 } else {
5390                         create_global_variable(declaration);
5391                 }
5392         }
5393
5394         /* second pass: create code/initializers */
5395         declaration = scope->declarations;
5396         for( ; declaration != NULL; declaration = declaration->next) {
5397                 if (declaration->namespc != NAMESPACE_NORMAL)
5398                         continue;
5399                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5400                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5401                         continue;
5402                 if (declaration->symbol == NULL)
5403                         continue;
5404
5405                 type_t *type = declaration->type;
5406                 if (type->kind == TYPE_FUNCTION) {
5407                         create_function(declaration);
5408                 } else {
5409                         assert(declaration->declaration_kind
5410                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5411                         current_ir_graph = get_const_code_irg();
5412                         create_declaration_initializer(declaration);
5413                 }
5414         }
5415 }
5416
5417 void init_ast2firm(void)
5418 {
5419         obstack_init(&asm_obst);
5420         init_atomic_modes();
5421
5422         id_underscore = new_id_from_chars("_", 1);
5423         id_imp        = new_id_from_chars("__imp_", 6);
5424
5425         /* OS option must be set to the backend */
5426         const char *s = "ia32-gasmode=linux";
5427         switch (firm_opt.os_support) {
5428         case OS_SUPPORT_MINGW:
5429                 create_ld_ident = create_ld_ident_win32;
5430                 s = "ia32-gasmode=mingw";
5431                 break;
5432         case OS_SUPPORT_LINUX:
5433                 create_ld_ident = create_ld_ident_linux_elf;
5434                 s = "ia32-gasmode=elf";
5435                 break;
5436         case OS_SUPPORT_MACHO:
5437                 create_ld_ident = create_ld_ident_macho;
5438                 s = "ia32-gasmode=macho";
5439                 break;
5440         }
5441         int res = firm_be_option(s);
5442         (void) res;
5443         assert(res);
5444
5445         /* create idents for all known runtime functions */
5446         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5447                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5448         }
5449
5450         entitymap_init(&entitymap);
5451 }
5452
5453 static void init_ir_types(void)
5454 {
5455         static int ir_types_initialized = 0;
5456         if (ir_types_initialized)
5457                 return;
5458         ir_types_initialized = 1;
5459
5460         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5461         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5462         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5463
5464         ir_type_int        = get_ir_type(type_int);
5465         ir_type_const_char = get_ir_type(type_const_char);
5466         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5467         ir_type_void       = get_ir_type(type_void);
5468 }
5469
5470 void exit_ast2firm(void)
5471 {
5472         entitymap_destroy(&entitymap);
5473         obstack_free(&asm_obst, NULL);
5474 }
5475
5476 static void global_asm_to_firm(statement_t *s)
5477 {
5478         for (; s != NULL; s = s->base.next) {
5479                 assert(s->kind == STATEMENT_ASM);
5480
5481                 char const *const text = s->asms.asm_text.begin;
5482                 size_t            size = s->asms.asm_text.size;
5483
5484                 /* skip the last \0 */
5485                 if (text[size - 1] == '\0')
5486                         --size;
5487
5488                 ident *const id = new_id_from_chars(text, size);
5489                 add_irp_asm(id);
5490         }
5491 }
5492
5493 void translation_unit_to_firm(translation_unit_t *unit)
5494 {
5495         /* just to be sure */
5496         continue_label      = NULL;
5497         break_label         = NULL;
5498         current_switch_cond = NULL;
5499
5500         init_ir_types();
5501
5502         scope_to_firm(&unit->scope);
5503         global_asm_to_firm(unit->global_asm);
5504 }