nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int        next_value_number_function;
  58 static ir_node   *continue_label;
  59 static ir_node   *break_label;
  60 static ir_node   *current_switch_cond;
  61 static bool       saw_default_label;
  62 static label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66 static symbol_t  *sym_C;
  67
  68 extern bool       have_const_functions;
  69
  70 static const entity_t     *current_function_entity;
  71 static ir_node            *current_function_name;
  72 static ir_node            *current_funcsig;
  73 static switch_statement_t *current_switch;
  74 static ir_graph           *current_function;
  75 static translation_unit_t *current_translation_unit;
  76
  77 static entitymap_t  entitymap;
  78
  79 static struct obstack asm_obst;
  80
  81 typedef enum declaration_kind_t {
  82         DECLARATION_KIND_UNKNOWN,
  83         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  84         DECLARATION_KIND_GLOBAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE,
  86         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  87         DECLARATION_KIND_FUNCTION,
  88         DECLARATION_KIND_COMPOUND_MEMBER,
  89         DECLARATION_KIND_INNER_FUNCTION
  90 } declaration_kind_t;
  91
  92 static ir_mode *get_ir_mode(type_t *type);
  93 static ir_type *get_ir_type_incomplete(type_t *type);
  94
  95 static void enqueue_inner_function(entity_t *entity)
  96 {
  97         ARR_APP1(entity_t*, inner_functions, entity);
  98 }
  99
 100 static entity_t *next_inner_function(void)
 101 {
 102         int len = ARR_LEN(inner_functions);
 103         if (len == 0)
 104                 return NULL;
 105
 106         entity_t *entity = inner_functions[len-1];
 107         ARR_SHRINKLEN(inner_functions, len-1);
 108
 109         return entity;
 110 }
 111
 112 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 113 {
 114         const variable_t *variable = get_irg_loc_description(irg, pos);
 115
 116         if (variable != NULL) {
 117                 warningf(&variable->base.base.source_position,
 118                          "variable '%#T' might be used uninitialized",
 119                          variable->base.type, variable->base.base.symbol);
 120         }
 121         return new_r_Unknown(irg, mode);
 122 }
 123
 124 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 125 {
 126         const source_position_t *pos = (const source_position_t*) dbg;
 127         if (pos == NULL)
 128                 return 0;
 129         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 130                                    pos->linenr);
 131 }
 132
 133 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 134 {
 135         const source_position_t *pos = (const source_position_t*) dbg;
 136         if (pos == NULL)
 137                 return NULL;
 138         if (line != NULL)
 139                 *line = pos->linenr;
 140         return pos->input_name;
 141 }
 142
 143 static dbg_info *get_dbg_info(const source_position_t *pos)
 144 {
 145         return (dbg_info*) pos;
 146 }
 147
 148 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 149
 150 static ir_mode *mode_int, *mode_uint;
 151
 152 static ir_node *_expression_to_firm(const expression_t *expression);
 153 static ir_node *expression_to_firm(const expression_t *expression);
 154 static void create_local_declaration(entity_t *entity);
 155
 156 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 157 {
 158         unsigned flags = get_atomic_type_flags(kind);
 159         unsigned size  = get_atomic_type_size(kind);
 160         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 161                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 162                 char            name[64];
 163                 ir_mode_sort    sort;
 164                 unsigned        bit_size     = size * 8;
 165                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 166                 ir_mode_arithmetic arithmetic;
 167
 168                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 169                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 170                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 171                                  bit_size);
 172                         sort         = irms_int_number;
 173                         arithmetic   = irma_twos_complement;
 174                 } else {
 175                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 176                         snprintf(name, sizeof(name), "F%u", bit_size);
 177                         sort         = irms_float_number;
 178                         arithmetic   = irma_ieee754;
 179                 }
 180                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 181                  * a too big amount */
 182                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 183                                    0);
 184         }
 185
 186         return NULL;
 187 }
 188
 189 /**
 190  * Initialises the atomic modes depending on the machine size.
 191  */
 192 static void init_atomic_modes(void)
 193 {
 194         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 195                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 196         }
 197         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 198         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 199
 200         /* there's no real void type in firm */
 201         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 202
 203         /* initialize pointer modes */
 204         char            name[64];
 205         ir_mode_sort    sort         = irms_reference;
 206         unsigned        bit_size     = machine_size;
 207         bool            is_signed    = 0;
 208         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 209         unsigned        modulo_shift
 210                 = bit_size < machine_size ? machine_size : bit_size;
 211
 212         snprintf(name, sizeof(name), "p%u", machine_size);
 213         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 214                                         modulo_shift);
 215
 216         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 217         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 218
 219         /* Hmm, pointers should be machine size */
 220         set_modeP_data(ptr_mode);
 221         set_modeP_code(ptr_mode);
 222 }
 223
 224 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 225 {
 226         assert(kind <= ATOMIC_TYPE_LAST);
 227         return atomic_modes[kind];
 228 }
 229
 230 static unsigned get_compound_type_size(compound_type_t *type)
 231 {
 232         ir_type *irtype = get_ir_type((type_t*) type);
 233         return get_type_size_bytes(irtype);
 234 }
 235
 236 static unsigned get_array_type_size(array_type_t *type)
 237 {
 238         assert(!type->is_vla);
 239         ir_type *irtype = get_ir_type((type_t*) type);
 240         return get_type_size_bytes(irtype);
 241 }
 242
 243 static unsigned get_type_size_const(type_t *type)
 244 {
 245         switch(type->kind) {
 246         case TYPE_ERROR:
 247                 panic("error type occurred");
 248         case TYPE_ATOMIC:
 249                 return get_atomic_type_size(type->atomic.akind);
 250         case TYPE_COMPLEX:
 251                 return 2 * get_atomic_type_size(type->complex.akind);
 252         case TYPE_IMAGINARY:
 253                 return get_atomic_type_size(type->imaginary.akind);
 254         case TYPE_ENUM:
 255                 return get_mode_size_bytes(mode_int);
 256         case TYPE_COMPOUND_UNION:
 257         case TYPE_COMPOUND_STRUCT:
 258                 return get_compound_type_size(&type->compound);
 259         case TYPE_FUNCTION:
 260                 /* just a pointer to the function */
 261                 return get_mode_size_bytes(mode_P_code);
 262         case TYPE_POINTER:
 263                 return get_mode_size_bytes(mode_P_data);
 264         case TYPE_ARRAY:
 265                 return get_array_type_size(&type->array);
 266         case TYPE_BUILTIN:
 267                 return get_type_size_const(type->builtin.real_type);
 268         case TYPE_BITFIELD:
 269                 panic("type size of bitfield request");
 270         case TYPE_TYPEDEF:
 271         case TYPE_TYPEOF:
 272         case TYPE_INVALID:
 273                 break;
 274         }
 275         panic("Trying to determine size of invalid type");
 276 }
 277
 278 static ir_node *get_type_size(type_t *type)
 279 {
 280         type = skip_typeref(type);
 281
 282         if (is_type_array(type) && type->array.is_vla) {
 283                 ir_node *size_node = type->array.size_node;
 284                 if (size_node == NULL) {
 285                         size_node = expression_to_firm(type->array.size_expression);
 286                         assert(!is_Const(size_node));
 287                         type->array.size_node = size_node;
 288                 }
 289
 290                 ir_node *elem_size = get_type_size(type->array.element_type);
 291                 ir_mode *mode      = get_irn_mode(size_node);
 292                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 293                 return real_size;
 294         }
 295
 296         ir_mode *mode = get_ir_mode(type_size_t);
 297         symconst_symbol sym;
 298         sym.type_p = get_ir_type(type);
 299         return new_SymConst(mode, sym, symconst_type_size);
 300 }
 301
 302 static unsigned count_parameters(const function_type_t *function_type)
 303 {
 304         unsigned count = 0;
 305
 306         function_parameter_t *parameter = function_type->parameters;
 307         for ( ; parameter != NULL; parameter = parameter->next) {
 308                 ++count;
 309         }
 310
 311         return count;
 312 }
 313
 314 /**
 315  * Creates a Firm type for an atomic type
 316  */
 317 static ir_type *create_atomic_type(const atomic_type_t *type)
 318 {
 319         atomic_type_kind_t  kind   = type->akind;
 320         ir_mode            *mode   = atomic_modes[kind];
 321         ident              *id     = get_mode_ident(mode);
 322         ir_type            *irtype = new_type_primitive(id, mode);
 323
 324         set_type_alignment_bytes(irtype, type->base.alignment);
 325
 326         return irtype;
 327 }
 328
 329 /**
 330  * Creates a Firm type for a complex type
 331  */
 332 static ir_type *create_complex_type(const complex_type_t *type)
 333 {
 334         atomic_type_kind_t  kind = type->akind;
 335         ir_mode            *mode = atomic_modes[kind];
 336         ident              *id   = get_mode_ident(mode);
 337
 338         (void) id;
 339
 340         /* FIXME: finish the array */
 341         return NULL;
 342 }
 343
 344 /**
 345  * Creates a Firm type for an imaginary type
 346  */
 347 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 348 {
 349         atomic_type_kind_t  kind      = type->akind;
 350         ir_mode            *mode      = atomic_modes[kind];
 351         ident              *id        = get_mode_ident(mode);
 352         ir_type            *irtype    = new_type_primitive(id, mode);
 353
 354         set_type_alignment_bytes(irtype, type->base.alignment);
 355
 356         return irtype;
 357 }
 358
 359 /**
 360  * return type of a parameter (and take transparent union gnu extension into
 361  * account)
 362  */
 363 static type_t *get_parameter_type(type_t *type)
 364 {
 365         type = skip_typeref(type);
 366         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 367                 compound_t *compound = type->compound.compound;
 368                 type                 = compound->members.entities->declaration.type;
 369         }
 370
 371         return type;
 372 }
 373
 374 static ir_type *create_method_type(const function_type_t *function_type)
 375 {
 376         type_t  *return_type  = skip_typeref(function_type->return_type);
 377
 378         ident   *id           = id_unique("functiontype.%u");
 379         int      n_parameters = count_parameters(function_type);
 380         int      n_results    = return_type == type_void ? 0 : 1;
 381         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 382
 383         if (return_type != type_void) {
 384                 ir_type *restype = get_ir_type(return_type);
 385                 set_method_res_type(irtype, 0, restype);
 386         }
 387
 388         function_parameter_t *parameter = function_type->parameters;
 389         int                   n         = 0;
 390         for ( ; parameter != NULL; parameter = parameter->next) {
 391                 type_t  *type     = get_parameter_type(parameter->type);
 392                 ir_type *p_irtype = get_ir_type(type);
 393                 set_method_param_type(irtype, n, p_irtype);
 394                 ++n;
 395         }
 396
 397         if (function_type->variadic || function_type->unspecified_parameters) {
 398                 set_method_variadicity(irtype, variadicity_variadic);
 399         }
 400
 401         unsigned cc = get_method_calling_convention(irtype);
 402         switch (function_type->calling_convention) {
 403         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 404         case CC_CDECL:
 405 is_cdecl:
 406                 set_method_calling_convention(irtype, SET_CDECL(cc));
 407                 break;
 408
 409         case CC_STDCALL:
 410                 if (function_type->variadic || function_type->unspecified_parameters)
 411                         goto is_cdecl;
 412
 413                 /* only non-variadic function can use stdcall, else use cdecl */
 414                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 415                 break;
 416
 417         case CC_FASTCALL:
 418                 if (function_type->variadic || function_type->unspecified_parameters)
 419                         goto is_cdecl;
 420                 /* only non-variadic function can use fastcall, else use cdecl */
 421                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 422                 break;
 423
 424         case CC_THISCALL:
 425                 /* Hmm, leave default, not accepted by the parser yet. */
 426                 break;
 427         }
 428
 429         return irtype;
 430 }
 431
 432 static ir_type *create_pointer_type(pointer_type_t *type)
 433 {
 434         type_t   *points_to    = type->points_to;
 435         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 436         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 437                                                   ir_points_to, mode_P_data);
 438
 439         return ir_type;
 440 }
 441
 442 static ir_type *create_array_type(array_type_t *type)
 443 {
 444         type_t  *element_type    = type->element_type;
 445         ir_type *ir_element_type = get_ir_type(element_type);
 446
 447         ident    *id      = id_unique("array.%u");
 448         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 449
 450         const int align = get_type_alignment_bytes(ir_element_type);
 451         set_type_alignment_bytes(ir_type, align);
 452
 453         if (type->size_constant) {
 454                 int n_elements = type->size;
 455
 456                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 457
 458                 size_t elemsize = get_type_size_bytes(ir_element_type);
 459                 if (elemsize % align > 0) {
 460                         elemsize += align - (elemsize % align);
 461                 }
 462                 set_type_size_bytes(ir_type, n_elements * elemsize);
 463         } else {
 464                 set_array_lower_bound_int(ir_type, 0, 0);
 465         }
 466         set_type_state(ir_type, layout_fixed);
 467
 468         return ir_type;
 469 }
 470
 471 /**
 472  * Return the signed integer type of size bits.
 473  *
 474  * @param size   the size
 475  */
 476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 477                                                  unsigned size)
 478 {
 479         static ir_mode *s_modes[64 + 1] = {NULL, };
 480         ir_type *res;
 481         ir_mode *mode;
 482
 483         if (size <= 0 || size > 64)
 484                 return NULL;
 485
 486         mode = s_modes[size];
 487         if (mode == NULL) {
 488                 char name[32];
 489
 490                 snprintf(name, sizeof(name), "bf_I%u", size);
 491                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 492                                    size <= 32 ? 32 : size );
 493                 s_modes[size] = mode;
 494         }
 495
 496         char name[32];
 497         snprintf(name, sizeof(name), "I%u", size);
 498         ident *id = new_id_from_str(name);
 499         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 500         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 501         set_primitive_base_type(res, base_tp);
 502
 503         return res;
 504 }
 505
 506 /**
 507  * Return the unsigned integer type of size bits.
 508  *
 509  * @param size   the size
 510  */
 511 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 512                                                    unsigned size)
 513 {
 514         static ir_mode *u_modes[64 + 1] = {NULL, };
 515         ir_type *res;
 516         ir_mode *mode;
 517
 518         if (size <= 0 || size > 64)
 519                 return NULL;
 520
 521         mode = u_modes[size];
 522         if (mode == NULL) {
 523                 char name[32];
 524
 525                 snprintf(name, sizeof(name), "bf_U%u", size);
 526                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 527                                    size <= 32 ? 32 : size );
 528                 u_modes[size] = mode;
 529         }
 530
 531         char name[32];
 532
 533         snprintf(name, sizeof(name), "U%u", size);
 534         ident *id = new_id_from_str(name);
 535         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 536         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 537         set_primitive_base_type(res, base_tp);
 538
 539         return res;
 540 }
 541
 542 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 543 {
 544         type_t *base = skip_typeref(type->base_type);
 545         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 546         ir_type *irbase = get_ir_type(base);
 547
 548         unsigned size = type->bit_size;
 549
 550         assert(!is_type_float(base));
 551         if (is_type_signed(base)) {
 552                 return get_signed_int_type_for_bit_size(irbase, size);
 553         } else {
 554                 return get_unsigned_int_type_for_bit_size(irbase, size);
 555         }
 556 }
 557
 558 #define INVALID_TYPE ((ir_type_ptr)-1)
 559
 560 enum {
 561         COMPOUND_IS_STRUCT = false,
 562         COMPOUND_IS_UNION  = true
 563 };
 564
 565 /**
 566  * Construct firm type from ast struct type.
 567  *
 568  * As anonymous inner structs get flattened to a single firm type, we might get
 569  * irtype, outer_offset and out_align passed (they represent the position of
 570  * the anonymous inner struct inside the resulting firm struct)
 571  */
 572 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 573                                      size_t *outer_offset, size_t *outer_align,
 574                                      bool incomplete, bool is_union)
 575 {
 576         compound_t *compound = type->compound;
 577
 578         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 579                 return compound->irtype;
 580         }
 581
 582         size_t align_all  = 1;
 583         size_t offset     = 0;
 584         size_t bit_offset = 0;
 585         size_t size       = 0;
 586
 587         if (irtype == NULL) {
 588                 symbol_t *symbol = compound->base.symbol;
 589                 ident    *id;
 590                 if (symbol != NULL) {
 591                         id = new_id_from_str(symbol->string);
 592                 } else {
 593                         if (is_union) {
 594                                 id = id_unique("__anonymous_union.%u");
 595                         } else {
 596                                 id = id_unique("__anonymous_struct.%u");
 597                         }
 598                 }
 599                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 600
 601                 if (is_union) {
 602                         irtype = new_d_type_union(id, dbgi);
 603                 } else {
 604                         irtype = new_d_type_struct(id, dbgi);
 605                 }
 606
 607                 compound->irtype_complete = false;
 608                 compound->irtype          = irtype;
 609         } else {
 610                 offset    = *outer_offset;
 611                 align_all = *outer_align;
 612         }
 613
 614         if (incomplete)
 615                 return irtype;
 616
 617         compound->irtype_complete = true;
 618
 619         entity_t *entry = compound->members.entities;
 620         for ( ; entry != NULL; entry = entry->base.next) {
 621                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 622                         continue;
 623
 624                 size_t prev_offset = offset;
 625
 626                 symbol_t *symbol     = entry->base.symbol;
 627                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 628                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 629
 630                 ident    *ident;
 631                 if (symbol != NULL) {
 632                         ident = new_id_from_str(symbol->string);
 633                 } else {
 634                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 635                                 create_compound_type(&entry_type->compound, irtype, &offset,
 636                                                      &align_all, false, COMPOUND_IS_STRUCT);
 637                                 goto finished_member;
 638                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 639                                 create_compound_type(&entry_type->compound, irtype, &offset,
 640                                                      &align_all, false, COMPOUND_IS_UNION);
 641                                 goto finished_member;
 642                         } else {
 643                                 assert(entry_type->kind == TYPE_BITFIELD);
 644                         }
 645                         ident = id_unique("anon.%u");
 646                 }
 647
 648                 ir_type *base_irtype;
 649                 if (entry_type->kind == TYPE_BITFIELD) {
 650                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 651                 } else {
 652                         base_irtype = get_ir_type(entry_type);
 653                 }
 654
 655                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 656                 size_t misalign        = offset % entry_alignment;
 657
 658                 ir_type   *entry_irtype = get_ir_type(entry_type);
 659                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 660
 661                 size_t base;
 662                 size_t bits_remainder;
 663                 if (entry_type->kind == TYPE_BITFIELD) {
 664                         size_t size_bits      = entry_type->bitfield.bit_size;
 665                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 666
 667                         if (size_bits > rest_size_bits) {
 668                                 /* start a new bucket */
 669                                 offset     += entry_alignment - misalign;
 670                                 bit_offset  = 0;
 671
 672                                 base           = offset;
 673                                 bits_remainder = 0;
 674                         } else {
 675                                 /* put into current bucket */
 676                                 base           = offset - misalign;
 677                                 bits_remainder = misalign * 8 + bit_offset;
 678                         }
 679
 680                         offset     += size_bits / 8;
 681                         bit_offset  = bit_offset + (size_bits % 8);
 682                 } else {
 683                         size_t entry_size = get_type_size_bytes(base_irtype);
 684                         if (misalign > 0 || bit_offset > 0)
 685                                 offset += entry_alignment - misalign;
 686
 687                         base           = offset;
 688                         bits_remainder = 0;
 689                         offset        += entry_size;
 690                         bit_offset     = 0;
 691                 }
 692
 693                 if (entry_alignment > align_all) {
 694                         if (entry_alignment % align_all != 0) {
 695                                 panic("uneven alignments not supported yet");
 696                         }
 697                         align_all = entry_alignment;
 698                 }
 699
 700                 set_entity_offset(entity, base);
 701                 set_entity_offset_bits_remainder(entity,
 702                                                  (unsigned char) bits_remainder);
 703                 //add_struct_member(irtype, entity);
 704                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 705                 assert(entry->compound_member.entity == NULL);
 706                 entry->compound_member.entity = entity;
 707
 708 finished_member:
 709                 if (is_union) {
 710                         size_t entry_size = offset - prev_offset;
 711                         if (entry_size > size) {
 712                                 size = entry_size;
 713                         }
 714                         offset     = 0;
 715                         bit_offset = 0;
 716                 }
 717         }
 718
 719         if (!is_union) {
 720                 size = offset;
 721         }
 722
 723         size_t misalign = offset % align_all;
 724         if (misalign > 0 || bit_offset > 0) {
 725                 size += align_all - misalign;
 726         }
 727
 728         if (outer_offset != NULL) {
 729                 if (!is_union) {
 730                         *outer_offset = offset;
 731                 } else {
 732                         *outer_offset += size;
 733                 }
 734
 735                 if (align_all > *outer_align) {
 736                         if (align_all % *outer_align != 0) {
 737                                 panic("uneven alignments not supported yet");
 738                         }
 739                         *outer_align = align_all;
 740                 }
 741         } else {
 742                 set_type_alignment_bytes(irtype, align_all);
 743                 set_type_size_bytes(irtype, size);
 744                 set_type_state(irtype, layout_fixed);
 745         }
 746
 747         return irtype;
 748 }
 749
 750 static ir_type *create_enum_type(enum_type_t *const type)
 751 {
 752         type->base.firm_type = ir_type_int;
 753
 754         ir_mode *const mode    = mode_int;
 755         tarval  *const one     = get_mode_one(mode);
 756         tarval  *      tv_next = get_tarval_null(mode);
 757
 758         bool constant_folding_old = constant_folding;
 759         constant_folding = true;
 760
 761         enum_t   *enume = type->enume;
 762         entity_t *entry = enume->base.next;
 763         for (; entry != NULL; entry = entry->base.next) {
 764                 if (entry->kind != ENTITY_ENUM_VALUE)
 765                         break;
 766
 767                 expression_t *const init = entry->enum_value.value;
 768                 if (init != NULL) {
 769                         ir_node *const cnst = expression_to_firm(init);
 770                         if (!is_Const(cnst)) {
 771                                 panic("couldn't fold constant");
 772                         }
 773                         tv_next = get_Const_tarval(cnst);
 774                 }
 775                 entry->enum_value.tv = tv_next;
 776                 tv_next = tarval_add(tv_next, one);
 777         }
 778
 779         constant_folding = constant_folding_old;
 780
 781         return ir_type_int;
 782 }
 783
 784 static ir_type *get_ir_type_incomplete(type_t *type)
 785 {
 786         assert(type != NULL);
 787         type = skip_typeref(type);
 788
 789         if (type->base.firm_type != NULL) {
 790                 assert(type->base.firm_type != INVALID_TYPE);
 791                 return type->base.firm_type;
 792         }
 793
 794         switch (type->kind) {
 795         case TYPE_COMPOUND_STRUCT:
 796                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 797                                             true, COMPOUND_IS_STRUCT);
 798         case TYPE_COMPOUND_UNION:
 799                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 800                                             true, COMPOUND_IS_UNION);
 801         default:
 802                 return get_ir_type(type);
 803         }
 804 }
 805
 806 ir_type *get_ir_type(type_t *type)
 807 {
 808         assert(type != NULL);
 809
 810         type = skip_typeref(type);
 811
 812         if (type->base.firm_type != NULL) {
 813                 assert(type->base.firm_type != INVALID_TYPE);
 814                 return type->base.firm_type;
 815         }
 816
 817         ir_type *firm_type = NULL;
 818         switch (type->kind) {
 819         case TYPE_ERROR:
 820                 /* Happens while constant folding, when there was an error */
 821                 return create_atomic_type(&type_void->atomic);
 822
 823         case TYPE_ATOMIC:
 824                 firm_type = create_atomic_type(&type->atomic);
 825                 break;
 826         case TYPE_COMPLEX:
 827                 firm_type = create_complex_type(&type->complex);
 828                 break;
 829         case TYPE_IMAGINARY:
 830                 firm_type = create_imaginary_type(&type->imaginary);
 831                 break;
 832         case TYPE_FUNCTION:
 833                 firm_type = create_method_type(&type->function);
 834                 break;
 835         case TYPE_POINTER:
 836                 firm_type = create_pointer_type(&type->pointer);
 837                 break;
 838         case TYPE_ARRAY:
 839                 firm_type = create_array_type(&type->array);
 840                 break;
 841         case TYPE_COMPOUND_STRUCT:
 842                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 843                                                  false, COMPOUND_IS_STRUCT);
 844                 break;
 845         case TYPE_COMPOUND_UNION:
 846                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 847                                                  false, COMPOUND_IS_UNION);
 848                 break;
 849         case TYPE_ENUM:
 850                 firm_type = create_enum_type(&type->enumt);
 851                 break;
 852         case TYPE_BUILTIN:
 853                 firm_type = get_ir_type(type->builtin.real_type);
 854                 break;
 855         case TYPE_BITFIELD:
 856                 firm_type = create_bitfield_type(&type->bitfield);
 857                 break;
 858
 859         case TYPE_TYPEOF:
 860         case TYPE_TYPEDEF:
 861         case TYPE_INVALID:
 862                 break;
 863         }
 864         if (firm_type == NULL)
 865                 panic("unknown type found");
 866
 867         type->base.firm_type = firm_type;
 868         return firm_type;
 869 }
 870
 871 ir_mode *get_ir_mode(type_t *type)
 872 {
 873         ir_type *irtype = get_ir_type(type);
 874
 875         /* firm doesn't report a mode for arrays somehow... */
 876         if (is_Array_type(irtype)) {
 877                 return mode_P_data;
 878         }
 879
 880         ir_mode *mode = get_type_mode(irtype);
 881         assert(mode != NULL);
 882         return mode;
 883 }
 884
 885 /** Names of the runtime functions. */
 886 static const struct {
 887         int        id;           /**< the rts id */
 888         int        n_res;        /**< number of return values */
 889         const char *name;        /**< the name of the rts function */
 890         int        n_params;     /**< number of parameters */
 891         unsigned   flags;        /**< language flags */
 892 } rts_data[] = {
 893         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 894         { rts_abort,      0, "abort",        0, _C89 },
 895         { rts_alloca,     1, "alloca",       1, _ALL },
 896         { rts_abs,        1, "abs",          1, _C89 },
 897         { rts_labs,       1, "labs",         1, _C89 },
 898         { rts_llabs,      1, "llabs",        1, _C99 },
 899         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 900
 901         { rts_fabs,       1, "fabs",         1, _C89 },
 902         { rts_sqrt,       1, "sqrt",         1, _C89 },
 903         { rts_cbrt,       1, "cbrt",         1, _C99 },
 904         { rts_exp,        1, "exp",          1, _C89 },
 905         { rts_exp2,       1, "exp2",         1, _C89 },
 906         { rts_exp10,      1, "exp10",        1, _GNUC },
 907         { rts_log,        1, "log",          1, _C89 },
 908         { rts_log2,       1, "log2",         1, _C89 },
 909         { rts_log10,      1, "log10",        1, _C89 },
 910         { rts_pow,        1, "pow",          2, _C89 },
 911         { rts_sin,        1, "sin",          1, _C89 },
 912         { rts_cos,        1, "cos",          1, _C89 },
 913         { rts_tan,        1, "tan",          1, _C89 },
 914         { rts_asin,       1, "asin",         1, _C89 },
 915         { rts_acos,       1, "acos",         1, _C89 },
 916         { rts_atan,       1, "atan",         1, _C89 },
 917         { rts_sinh,       1, "sinh",         1, _C89 },
 918         { rts_cosh,       1, "cosh",         1, _C89 },
 919         { rts_tanh,       1, "tanh",         1, _C89 },
 920
 921         { rts_fabsf,      1, "fabsf",        1, _C99 },
 922         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 923         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 924         { rts_expf,       1, "expf",         1, _C99 },
 925         { rts_exp2f,      1, "exp2f",        1, _C99 },
 926         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 927         { rts_logf,       1, "logf",         1, _C99 },
 928         { rts_log2f,      1, "log2f",        1, _C99 },
 929         { rts_log10f,     1, "log10f",       1, _C99 },
 930         { rts_powf,       1, "powf",         2, _C99 },
 931         { rts_sinf,       1, "sinf",         1, _C99 },
 932         { rts_cosf,       1, "cosf",         1, _C99 },
 933         { rts_tanf,       1, "tanf",         1, _C99 },
 934         { rts_asinf,      1, "asinf",        1, _C99 },
 935         { rts_acosf,      1, "acosf",        1, _C99 },
 936         { rts_atanf,      1, "atanf",        1, _C99 },
 937         { rts_sinhf,      1, "sinhf",        1, _C99 },
 938         { rts_coshf,      1, "coshf",        1, _C99 },
 939         { rts_tanhf,      1, "tanhf",        1, _C99 },
 940
 941         { rts_fabsl,      1, "fabsl",        1, _C99 },
 942         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 943         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 944         { rts_expl,       1, "expl",         1, _C99 },
 945         { rts_exp2l,      1, "exp2l",        1, _C99 },
 946         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 947         { rts_logl,       1, "logl",         1, _C99 },
 948         { rts_log2l,      1, "log2l",        1, _C99 },
 949         { rts_log10l,     1, "log10l",       1, _C99 },
 950         { rts_powl,       1, "powl",         2, _C99 },
 951         { rts_sinl,       1, "sinl",         1, _C99 },
 952         { rts_cosl,       1, "cosl",         1, _C99 },
 953         { rts_tanl,       1, "tanl",         1, _C99 },
 954         { rts_asinl,      1, "asinl",        1, _C99 },
 955         { rts_acosl,      1, "acosl",        1, _C99 },
 956         { rts_atanl,      1, "atanl",        1, _C99 },
 957         { rts_sinhl,      1, "sinhl",        1, _C99 },
 958         { rts_coshl,      1, "coshl",        1, _C99 },
 959         { rts_tanhl,      1, "tanhl",        1, _C99 },
 960
 961         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 962         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 963         { rts_strcmp,     1, "strcmp",       2, _C89 },
 964         { rts_strncmp,    1, "strncmp",      3, _C89 }
 965 };
 966
 967 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 968
 969 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 970
 971 /**
 972  * Handle GNU attributes for entities
 973  *
 974  * @param ent   the entity
 975  * @param decl  the routine declaration
 976  */
 977 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 978 {
 979         assert(is_declaration(entity));
 980         decl_modifiers_t modifiers = entity->declaration.modifiers;
 981         if (modifiers & DM_PURE) {
 982                 /* TRUE if the declaration includes the GNU
 983                    __attribute__((pure)) specifier. */
 984                 set_entity_additional_property(irentity, mtp_property_pure);
 985         }
 986         if (modifiers & DM_CONST) {
 987                 set_entity_additional_property(irentity, mtp_property_const);
 988                 have_const_functions = true;
 989         }
 990         if (modifiers & DM_USED) {
 991                 /* TRUE if the declaration includes the GNU
 992                    __attribute__((used)) specifier. */
 993                 set_entity_stickyness(irentity, stickyness_sticky);
 994         }
 995 }
 996
 997 static bool is_main(entity_t *entity)
 998 {
 999         static symbol_t *sym_main = NULL;
1000         if (sym_main == NULL) {
1001                 sym_main = symbol_table_insert("main");
1002         }
1003
1004         if (entity->base.symbol != sym_main)
1005                 return false;
1006         /* must be in outermost scope */
1007         if (entity->base.parent_scope != &current_translation_unit->scope)
1008                 return false;
1009
1010         return true;
1011 }
1012
1013 /**
1014  * Creates an entity representing a function.
1015  *
1016  * @param declaration  the function declaration
1017  */
1018 static ir_entity *get_function_entity(entity_t *entity)
1019 {
1020         assert(entity->kind == ENTITY_FUNCTION);
1021         if (entity->function.entity != NULL) {
1022                 return entity->function.entity;
1023         }
1024
1025         if (is_main(entity)) {
1026                 /* force main to C linkage */
1027                 type_t *type = entity->declaration.type;
1028                 assert(is_type_function(type));
1029                 if (type->function.linkage != NULL && type->function.linkage != sym_C) {
1030                         errorf(&entity->base.source_position,
1031                                "main must have \"C\" linkage");
1032                 }
1033
1034                 if (type->function.linkage == NULL || type->function.linkage != sym_C) {
1035                         type_t *new_type           = duplicate_type(type);
1036                         new_type->function.linkage = sym_C;
1037
1038                         type = typehash_insert(new_type);
1039                         if (type != new_type) {
1040                                 obstack_free(type_obst, new_type);
1041                         }
1042                         entity->declaration.type = type;
1043                 }
1044         }
1045
1046         symbol_t *symbol = entity->base.symbol;
1047         ident    *id     = new_id_from_str(symbol->string);
1048
1049         ir_type   *global_type    = get_glob_type();
1050         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1051         bool const has_body       = entity->function.statement != NULL;
1052
1053         /* already an entity defined? */
1054         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1055         if (irentity != NULL) {
1056                 if (get_entity_visibility(irentity) == visibility_external_allocated
1057                                 && has_body) {
1058                         set_entity_visibility(irentity, visibility_external_visible);
1059                 }
1060                 goto entity_created;
1061         }
1062
1063         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1064         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1065         set_entity_ld_ident(irentity, create_ld_ident(entity));
1066
1067         handle_gnu_attributes_ent(irentity, entity);
1068
1069         /* static inline             => local
1070          * extern inline             => local
1071          * inline without definition => local
1072          * inline with definition    => external_visible */
1073         storage_class_tag_t const storage_class
1074                 = (storage_class_tag_t) entity->declaration.storage_class;
1075         bool                const is_inline     = entity->function.is_inline;
1076         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1077                 set_entity_visibility(irentity, visibility_external_visible);
1078         } else if (storage_class == STORAGE_CLASS_STATIC ||
1079                    (is_inline && has_body)) {
1080                 if (!has_body) {
1081                         /* this entity was declared, but is defined nowhere */
1082                         set_entity_peculiarity(irentity, peculiarity_description);
1083                 }
1084                 set_entity_visibility(irentity, visibility_local);
1085         } else if (has_body) {
1086                 set_entity_visibility(irentity, visibility_external_visible);
1087         } else {
1088                 set_entity_visibility(irentity, visibility_external_allocated);
1089         }
1090         set_entity_allocation(irentity, allocation_static);
1091
1092         /* We should check for file scope here, but as long as we compile C only
1093            this is not needed. */
1094         if (! firm_opt.freestanding) {
1095                 /* check for a known runtime function */
1096                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1097                         if (id != rts_idents[i])
1098                                 continue;
1099
1100                         /* ignore those rts functions not necessary needed for current mode */
1101                         if ((c_mode & rts_data[i].flags) == 0)
1102                                 continue;
1103                         assert(rts_entities[rts_data[i].id] == NULL);
1104                         rts_entities[rts_data[i].id] = irentity;
1105                 }
1106         }
1107
1108         entitymap_insert(&entitymap, symbol, irentity);
1109
1110 entity_created:
1111         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1112         entity->function.entity  = irentity;
1113
1114         return irentity;
1115 }
1116
1117 /**
1118  * Creates a Const node representing a constant.
1119  */
1120 static ir_node *const_to_firm(const const_expression_t *cnst)
1121 {
1122         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1123         ir_mode  *mode = get_ir_mode(cnst->base.type);
1124
1125         char    buf[128];
1126         tarval *tv;
1127         size_t  len;
1128         if (mode_is_float(mode)) {
1129                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1130         } else {
1131                 if (mode_is_signed(mode)) {
1132                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1133                 } else {
1134                         len = snprintf(buf, sizeof(buf), "%llu",
1135                                        (unsigned long long) cnst->v.int_value);
1136                 }
1137                 tv = new_tarval_from_str(buf, len, mode);
1138         }
1139
1140         return new_d_Const(dbgi, mode, tv);
1141 }
1142
1143 /**
1144  * Creates a Const node representing a character constant.
1145  */
1146 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1147 {
1148         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1149         ir_mode  *mode = get_ir_mode(cnst->base.type);
1150
1151         long long int v = 0;
1152         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1153                 if (char_is_signed) {
1154                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1155                 } else {
1156                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1157                 }
1158         }
1159         char    buf[128];
1160         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1161         tarval *tv = new_tarval_from_str(buf, len, mode);
1162
1163         return new_d_Const(dbgi, mode, tv);
1164 }
1165
1166 /**
1167  * Creates a Const node representing a wide character constant.
1168  */
1169 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1170 {
1171         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1172         ir_mode  *mode = get_ir_mode(cnst->base.type);
1173
1174         long long int v = cnst->v.wide_character.begin[0];
1175
1176         char    buf[128];
1177         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1178         tarval *tv = new_tarval_from_str(buf, len, mode);
1179
1180         return new_d_Const(dbgi, mode, tv);
1181 }
1182
1183 /**
1184  * Creates a SymConst for a given entity.
1185  *
1186  * @param dbgi    debug info
1187  * @param mode    the (reference) mode for the SymConst
1188  * @param entity  the entity
1189  */
1190 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1191                               ir_entity *entity)
1192 {
1193         assert(entity != NULL);
1194         union symconst_symbol sym;
1195         sym.entity_p = entity;
1196         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1197 }
1198
1199 /**
1200  * Creates a SymConst node representing a string constant.
1201  *
1202  * @param src_pos    the source position of the string constant
1203  * @param id_prefix  a prefix for the name of the generated string constant
1204  * @param value      the value of the string constant
1205  */
1206 static ir_node *string_to_firm(const source_position_t *const src_pos,
1207                                const char *const id_prefix,
1208                                const string_t *const value)
1209 {
1210         ir_type  *const global_type = get_glob_type();
1211         dbg_info *const dbgi        = get_dbg_info(src_pos);
1212         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1213                                                        ir_type_const_char, dbgi);
1214
1215         ident     *const id     = id_unique(id_prefix);
1216         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1217         set_entity_ld_ident(entity, id);
1218         set_entity_variability(entity, variability_constant);
1219         set_entity_allocation(entity, allocation_static);
1220
1221         ir_type *const elem_type = ir_type_const_char;
1222         ir_mode *const mode      = get_type_mode(elem_type);
1223
1224         const char* const string = value->begin;
1225         const size_t      slen   = value->size;
1226
1227         set_array_lower_bound_int(type, 0, 0);
1228         set_array_upper_bound_int(type, 0, slen);
1229         set_type_size_bytes(type, slen);
1230         set_type_state(type, layout_fixed);
1231
1232         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1233         for (size_t i = 0; i < slen; ++i) {
1234                 tvs[i] = new_tarval_from_long(string[i], mode);
1235         }
1236
1237         set_array_entity_values(entity, tvs, slen);
1238         free(tvs);
1239
1240         return create_symconst(dbgi, mode_P_data, entity);
1241 }
1242
1243 /**
1244  * Creates a SymConst node representing a string literal.
1245  *
1246  * @param literal   the string literal
1247  */
1248 static ir_node *string_literal_to_firm(
1249                 const string_literal_expression_t* literal)
1250 {
1251         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1252                               &literal->value);
1253 }
1254
1255 /**
1256  * Creates a SymConst node representing a wide string literal.
1257  *
1258  * @param literal   the wide string literal
1259  */
1260 static ir_node *wide_string_literal_to_firm(
1261         const wide_string_literal_expression_t* const literal)
1262 {
1263         ir_type *const global_type = get_glob_type();
1264         ir_type *const elem_type   = ir_type_wchar_t;
1265         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1266         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1267                                                     elem_type, dbgi);
1268
1269         ident     *const id     = id_unique("Lstr.%u");
1270         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1271         set_entity_ld_ident(entity, id);
1272         set_entity_variability(entity, variability_constant);
1273         set_entity_allocation(entity, allocation_static);
1274
1275         ir_mode *const mode      = get_type_mode(elem_type);
1276
1277         const wchar_rep_t *const string = literal->value.begin;
1278         const size_t             slen   = literal->value.size;
1279
1280         set_array_lower_bound_int(type, 0, 0);
1281         set_array_upper_bound_int(type, 0, slen);
1282         set_type_size_bytes(type, slen);
1283         set_type_state(type, layout_fixed);
1284
1285         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1286         for (size_t i = 0; i < slen; ++i) {
1287                 tvs[i] = new_tarval_from_long(string[i], mode);
1288         }
1289
1290         set_array_entity_values(entity, tvs, slen);
1291         free(tvs);
1292
1293         return create_symconst(dbgi, mode_P_data, entity);
1294 }
1295
1296 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1297                                       ir_node *const addr)
1298 {
1299         ir_type *irtype = get_ir_type(type);
1300         if (is_compound_type(irtype)
1301                         || is_Method_type(irtype)
1302                         || is_Array_type(irtype)) {
1303                 return addr;
1304         }
1305
1306         ir_mode *const mode     = get_type_mode(irtype);
1307         ir_node *const memory   = get_store();
1308         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1309         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1310         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1311
1312         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1313                 set_Load_volatility(load, volatility_is_volatile);
1314         }
1315
1316         set_store(load_mem);
1317         return load_res;
1318 }
1319
1320 /**
1321  * Creates a strict Conv if neccessary.
1322  */
1323 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1324 {
1325         ir_mode *mode = get_irn_mode(node);
1326
1327         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1328                 return node;
1329         if (!mode_is_float(mode))
1330                 return node;
1331
1332         /* check if there is already a Conv */
1333         if (is_Conv(node)) {
1334                 /* convert it into a strict Conv */
1335                 set_Conv_strict(node, 1);
1336                 return node;
1337         }
1338
1339         /* otherwise create a new one */
1340         return new_d_strictConv(dbgi, node, mode);
1341 }
1342
1343 static ir_node *get_global_var_address(dbg_info *const dbgi,
1344                                        const entity_t *const entity)
1345 {
1346         assert(entity->kind == ENTITY_VARIABLE);
1347         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1348
1349         ir_entity *const irentity = entity->variable.v.entity;
1350         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1351                 case STORAGE_CLASS_THREAD:
1352                 case STORAGE_CLASS_THREAD_EXTERN:
1353                 case STORAGE_CLASS_THREAD_STATIC: {
1354                         ir_node *const no_mem = new_NoMem();
1355                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1356                         return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1357                 }
1358
1359                 default:
1360                         return create_symconst(dbgi, mode_P_data, irentity);
1361         }
1362 }
1363
1364 /**
1365  * Returns the correct base address depending on whether it is a parameter or a
1366  * normal local variable.
1367  */
1368 static ir_node *get_local_frame(ir_entity *const ent)
1369 {
1370         ir_graph      *const irg   = current_ir_graph;
1371         const ir_type *const owner = get_entity_owner(ent);
1372         if (owner == get_irg_frame_type(irg)) {
1373                 return get_irg_frame(irg);
1374         } else {
1375                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1376                 return get_irg_value_param_base(irg);
1377         }
1378 }
1379
1380 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1381 {
1382         ir_mode *value_mode = get_irn_mode(value);
1383
1384         if (value_mode == dest_mode || is_Bad(value))
1385                 return value;
1386
1387         if (dest_mode == mode_b) {
1388                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1389                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1390                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1391                 return proj;
1392         }
1393
1394         return new_d_Conv(dbgi, value, dest_mode);
1395 }
1396
1397 /**
1398  * Keep all memory edges of the given block.
1399  */
1400 static void keep_all_memory(ir_node *block) {
1401         ir_node *old = get_cur_block();
1402
1403         set_cur_block(block);
1404         keep_alive(get_store());
1405         /* TODO: keep all memory edges from restricted pointers */
1406         set_cur_block(old);
1407 }
1408
1409 static ir_node *reference_expression_enum_value_to_firm(
1410                 const reference_expression_t *ref)
1411 {
1412         entity_t *entity = ref->entity;
1413         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1414         /* make sure the type is constructed */
1415         (void) get_ir_type(type);
1416
1417         ir_mode *const mode = get_ir_mode(type);
1418         return new_Const(mode, entity->enum_value.tv);
1419 }
1420
1421 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1422 {
1423         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1424         entity_t *entity = ref->entity;
1425         assert(is_declaration(entity));
1426         type_t   *type   = skip_typeref(entity->declaration.type);
1427
1428         /* make sure the type is constructed */
1429         (void) get_ir_type(type);
1430
1431         switch ((declaration_kind_t) entity->declaration.kind) {
1432         case DECLARATION_KIND_UNKNOWN:
1433                 break;
1434
1435         case DECLARATION_KIND_LOCAL_VARIABLE: {
1436                 ir_mode *const mode = get_ir_mode(type);
1437                 return get_value(entity->variable.v.value_number, mode);
1438         }
1439         case DECLARATION_KIND_FUNCTION: {
1440                 ir_mode *const mode = get_ir_mode(type);
1441                 return create_symconst(dbgi, mode, entity->function.entity);
1442         }
1443         case DECLARATION_KIND_INNER_FUNCTION: {
1444                 ir_mode *const mode = get_ir_mode(type);
1445                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1446                         /* inner function not using the closure */
1447                         return create_symconst(dbgi, mode, entity->function.entity);
1448                 } else {
1449                         /* TODO: need trampoline here */
1450                         panic("Trampoline code not implemented");
1451                         return create_symconst(dbgi, mode, entity->function.entity);
1452                 }
1453         }
1454         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1455                 ir_node *const addr = get_global_var_address(dbgi, entity);
1456                 return deref_address(dbgi, entity->declaration.type, addr);
1457         }
1458
1459         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1460                 ir_entity *irentity = entity->variable.v.entity;
1461                 ir_node   *frame    = get_local_frame(irentity);
1462                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1463                 return deref_address(dbgi, entity->declaration.type, sel);
1464         }
1465
1466         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1467                 return entity->variable.v.vla_base;
1468
1469         case DECLARATION_KIND_COMPOUND_MEMBER:
1470                 panic("not implemented reference type");
1471         }
1472
1473         panic("reference to declaration with unknown type found");
1474 }
1475
1476 static ir_node *reference_addr(const reference_expression_t *ref)
1477 {
1478         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1479         entity_t *entity = ref->entity;
1480         assert(is_declaration(entity));
1481
1482         switch((declaration_kind_t) entity->declaration.kind) {
1483         case DECLARATION_KIND_UNKNOWN:
1484                 break;
1485         case DECLARATION_KIND_LOCAL_VARIABLE:
1486                 /* you can store to a local variable (so we don't panic but return NULL
1487                  * as an indicator for no real address) */
1488                 return NULL;
1489         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1490                 ir_node *const addr = get_global_var_address(dbgi, entity);
1491                 return addr;
1492         }
1493         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1494                 ir_entity *irentity = entity->variable.v.entity;
1495                 ir_node   *frame    = get_local_frame(irentity);
1496                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1497
1498                 return sel;
1499         }
1500
1501         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1502                 return entity->variable.v.vla_base;
1503
1504         case DECLARATION_KIND_FUNCTION: {
1505                 type_t  *const type = skip_typeref(entity->declaration.type);
1506                 ir_mode *const mode = get_ir_mode(type);
1507                 return create_symconst(dbgi, mode, entity->function.entity);
1508         }
1509
1510         case DECLARATION_KIND_INNER_FUNCTION:
1511         case DECLARATION_KIND_COMPOUND_MEMBER:
1512                 panic("not implemented reference type");
1513         }
1514
1515         panic("reference to declaration with unknown type found");
1516 }
1517
1518 /**
1519  * Transform calls to builtin functions.
1520  */
1521 static ir_node *process_builtin_call(const call_expression_t *call)
1522 {
1523         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1524
1525         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1526         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1527
1528         type_t *type = skip_typeref(builtin->base.type);
1529         assert(is_type_pointer(type));
1530
1531         type_t   *function_type = skip_typeref(type->pointer.points_to);
1532         symbol_t *symbol        = builtin->symbol;
1533
1534         switch(symbol->ID) {
1535         case T___builtin_alloca: {
1536                 if (call->arguments == NULL || call->arguments->next != NULL) {
1537                         panic("invalid number of parameters on __builtin_alloca");
1538                 }
1539                 expression_t *argument = call->arguments->expression;
1540                 ir_node      *size     = expression_to_firm(argument);
1541
1542                 ir_node *store  = get_store();
1543                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1544                                               stack_alloc);
1545                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1546                 set_store(proj_m);
1547                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1548
1549                 return res;
1550         }
1551
1552         case T___builtin_huge_val:
1553         case T___builtin_inf:
1554         case T___builtin_inff:
1555         case T___builtin_infl: {
1556                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1557                 tarval  *tv   = get_mode_infinite(mode);
1558                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1559                 return   res;
1560         }
1561         case T___builtin_nan:
1562         case T___builtin_nanf:
1563         case T___builtin_nanl: {
1564                 /* Ignore string for now... */
1565                 assert(is_type_function(function_type));
1566                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1567                 tarval  *tv   = get_mode_NAN(mode);
1568                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1569                 return res;
1570         }
1571         case T___builtin_va_end:
1572                 return NULL;
1573         default:
1574                 panic("Unsupported builtin found\n");
1575         }
1576 }
1577
1578 /**
1579  * Transform a call expression.
1580  * Handles some special cases, like alloca() calls, which must be resolved
1581  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1582  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1583  * handled right...
1584  */
1585 static ir_node *call_expression_to_firm(const call_expression_t *call)
1586 {
1587         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1588         assert(get_cur_block() != NULL);
1589
1590         expression_t *function = call->function;
1591         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1592                 return process_builtin_call(call);
1593         }
1594         if (function->kind == EXPR_REFERENCE) {
1595                 const reference_expression_t *ref    = &function->reference;
1596                 entity_t                     *entity = ref->entity;
1597
1598                 if (entity->kind == ENTITY_FUNCTION
1599                                 && entity->function.entity == rts_entities[rts_alloca]) {
1600                         /* handle alloca() call */
1601                         expression_t *argument = call->arguments->expression;
1602                         ir_node      *size     = expression_to_firm(argument);
1603
1604                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1605
1606                         ir_node  *store  = get_store();
1607                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1608                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1609                                                        stack_alloc);
1610                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1611                         set_store(proj_m);
1612                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1613
1614                         return res;
1615                 }
1616         }
1617         ir_node *callee = expression_to_firm(function);
1618
1619         type_t *type = skip_typeref(function->base.type);
1620         assert(is_type_pointer(type));
1621         pointer_type_t *pointer_type = &type->pointer;
1622         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1623         assert(is_type_function(points_to));
1624         function_type_t *function_type = &points_to->function;
1625
1626         int      n_parameters = 0;
1627         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1628         ir_type *new_method_type = NULL;
1629         if (function_type->variadic || function_type->unspecified_parameters) {
1630                 const call_argument_t *argument = call->arguments;
1631                 for ( ; argument != NULL; argument = argument->next) {
1632                         ++n_parameters;
1633                 }
1634
1635                 /* we need to construct a new method type matching the call
1636                  * arguments... */
1637                 int n_res       = get_method_n_ress(ir_method_type);
1638                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1639                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1640                                                     n_parameters, n_res, dbgi);
1641                 set_method_calling_convention(new_method_type,
1642                                get_method_calling_convention(ir_method_type));
1643                 set_method_additional_properties(new_method_type,
1644                                get_method_additional_properties(ir_method_type));
1645                 set_method_variadicity(new_method_type,
1646                                        get_method_variadicity(ir_method_type));
1647
1648                 for (int i = 0; i < n_res; ++i) {
1649                         set_method_res_type(new_method_type, i,
1650                                             get_method_res_type(ir_method_type, i));
1651                 }
1652                 argument = call->arguments;
1653                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1654                         expression_t *expression = argument->expression;
1655                         ir_type      *irtype     = get_ir_type(expression->base.type);
1656                         set_method_param_type(new_method_type, i, irtype);
1657                 }
1658                 ir_method_type = new_method_type;
1659         } else {
1660                 n_parameters = get_method_n_params(ir_method_type);
1661         }
1662
1663         ir_node *in[n_parameters];
1664
1665         const call_argument_t *argument = call->arguments;
1666         for (int n = 0; n < n_parameters; ++n) {
1667                 expression_t *expression = argument->expression;
1668                 ir_node      *arg_node   = expression_to_firm(expression);
1669
1670                 arg_node = do_strict_conv(dbgi, arg_node);
1671
1672                 in[n] = arg_node;
1673
1674                 argument = argument->next;
1675         }
1676
1677         ir_node  *store = get_store();
1678         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1679                                      ir_method_type);
1680         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1681         set_store(mem);
1682
1683         type_t  *return_type = skip_typeref(function_type->return_type);
1684         ir_node *result      = NULL;
1685
1686         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1687                 ir_mode *mode;
1688                 if (is_type_scalar(return_type)) {
1689                         mode = get_ir_mode(return_type);
1690                 } else {
1691                         mode = mode_P_data;
1692                 }
1693                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1694                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1695         }
1696
1697         if (function->kind == EXPR_REFERENCE &&
1698             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1699                 /* A dead end:  Keep the Call and the Block.  Also place all further
1700                  * nodes into a new and unreachable block. */
1701                 keep_alive(node);
1702                 keep_alive(get_cur_block());
1703                 new_Block(0, NULL);
1704         }
1705
1706         return result;
1707 }
1708
1709 static void statement_to_firm(statement_t *statement);
1710 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1711
1712 static ir_node *expression_to_addr(const expression_t *expression);
1713 static ir_node *create_condition_evaluation(const expression_t *expression,
1714                                             ir_node *true_block,
1715                                             ir_node *false_block);
1716
1717 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1718                          ir_node *value)
1719 {
1720         value = do_strict_conv(dbgi, value);
1721
1722         ir_node *memory = get_store();
1723
1724         if (is_type_scalar(type)) {
1725                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1726                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1727                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1728                         set_Store_volatility(store, volatility_is_volatile);
1729                 set_store(store_mem);
1730         } else {
1731                 ir_type *irtype    = get_ir_type(type);
1732                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1733                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1734                 set_store(copyb_mem);
1735         }
1736 }
1737
1738 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1739 {
1740         tarval *all_one   = get_mode_all_one(mode);
1741         int     mode_size = get_mode_size_bits(mode);
1742
1743         assert(offset >= 0);
1744         assert(size   >= 0);
1745         assert(offset + size <= mode_size);
1746         if (size == mode_size) {
1747                 return all_one;
1748         }
1749
1750         long    shiftr    = get_mode_size_bits(mode) - size;
1751         long    shiftl    = offset;
1752         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1753         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1754         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1755         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1756
1757         return mask1;
1758 }
1759
1760 static void bitfield_store_to_firm(dbg_info *dbgi,
1761                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1762 {
1763         ir_type *entity_type = get_entity_type(entity);
1764         ir_type *base_type   = get_primitive_base_type(entity_type);
1765         assert(base_type != NULL);
1766         ir_mode *mode        = get_type_mode(base_type);
1767
1768         value = create_conv(dbgi, value, mode);
1769
1770         /* kill upper bits of value and shift to right position */
1771         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1772         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1773
1774         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1775         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1776         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1777         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1778         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1779         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1780
1781         /* load current value */
1782         ir_node  *mem             = get_store();
1783         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1784         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1785         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1786         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1787         tarval   *inv_mask        = tarval_not(shift_mask);
1788         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1789         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1790
1791         /* construct new value and store */
1792         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1793         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1794         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1795         set_store(store_mem);
1796
1797         if (set_volatile) {
1798                 set_Load_volatility(load, volatility_is_volatile);
1799                 set_Store_volatility(store, volatility_is_volatile);
1800         }
1801 }
1802
1803 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1804                 ir_node *addr)
1805 {
1806         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1807         type_t   *type     = expression->base.type;
1808         ir_mode  *mode     = get_ir_mode(type);
1809         ir_node  *mem      = get_store();
1810         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1811         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1812         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1813
1814         load_res           = create_conv(dbgi, load_res, mode_int);
1815
1816         set_store(load_mem);
1817
1818         /* kill upper bits */
1819         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1820         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1821         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1822         ir_type   *entity_type  = get_entity_type(entity);
1823         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1824         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1825         assert(shift_bitsl >= 0);
1826         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1827         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1828         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1829
1830         long       shift_bitsr  = bitoffset + shift_bitsl;
1831         assert(shift_bitsr <= (long) machine_size);
1832         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1833         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1834         ir_node   *shiftr;
1835         if (mode_is_signed(mode)) {
1836                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1837         } else {
1838                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1839         }
1840
1841         return create_conv(dbgi, shiftr, mode);
1842 }
1843
1844 /* make sure the selected compound type is constructed */
1845 static void construct_select_compound(const select_expression_t *expression)
1846 {
1847         type_t *type = skip_typeref(expression->compound->base.type);
1848         if (is_type_pointer(type)) {
1849                 type = type->pointer.points_to;
1850         }
1851         (void) get_ir_type(type);
1852 }
1853
1854 static void set_value_for_expression_addr(const expression_t *expression,
1855                                           ir_node *value, ir_node *addr)
1856 {
1857         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1858         value          = do_strict_conv(dbgi, value);
1859
1860         if (expression->kind == EXPR_REFERENCE) {
1861                 const reference_expression_t *ref = &expression->reference;
1862
1863                 entity_t *entity = ref->entity;
1864                 assert(is_declaration(entity));
1865                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1866                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1867                         set_value(entity->variable.v.value_number, value);
1868                         return;
1869                 }
1870         }
1871
1872         if (addr == NULL)
1873                 addr = expression_to_addr(expression);
1874
1875         type_t *type = skip_typeref(expression->base.type);
1876
1877         if (expression->kind == EXPR_SELECT) {
1878                 const select_expression_t *select = &expression->select;
1879
1880                 construct_select_compound(select);
1881
1882                 entity_t *entity = select->compound_entry;
1883                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1884                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1885                         ir_entity *irentity = entity->compound_member.entity;
1886                         bool       set_volatile
1887                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1888                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1889                         return;
1890                 }
1891         }
1892
1893         assign_value(dbgi, addr, type, value);
1894 }
1895
1896 static void set_value_for_expression(const expression_t *expression,
1897                                      ir_node *value)
1898 {
1899         set_value_for_expression_addr(expression, value, NULL);
1900 }
1901
1902 static ir_node *get_value_from_lvalue(const expression_t *expression,
1903                                       ir_node *addr)
1904 {
1905         if (expression->kind == EXPR_REFERENCE) {
1906                 const reference_expression_t *ref = &expression->reference;
1907
1908                 entity_t *entity = ref->entity;
1909                 assert(entity->kind == ENTITY_VARIABLE);
1910                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1911                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1912                         assert(addr == NULL);
1913                         ir_mode *mode = get_ir_mode(expression->base.type);
1914                         return get_value(entity->variable.v.value_number, mode);
1915                 }
1916         }
1917
1918         assert(addr != NULL);
1919         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1920
1921         ir_node *value;
1922         if (expression->kind == EXPR_SELECT &&
1923             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1924             construct_select_compound(&expression->select);
1925                 value = bitfield_extract_to_firm(&expression->select, addr);
1926         } else {
1927                 value = deref_address(dbgi, expression->base.type, addr);
1928         }
1929
1930         return value;
1931 }
1932
1933
1934 static ir_node *create_incdec(const unary_expression_t *expression)
1935 {
1936         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1937         const expression_t *value_expr = expression->value;
1938         ir_node            *addr       = expression_to_addr(value_expr);
1939         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1940
1941         type_t  *type = skip_typeref(expression->base.type);
1942         ir_mode *mode = get_ir_mode(expression->base.type);
1943
1944         ir_node *offset;
1945         if (is_type_pointer(type)) {
1946                 pointer_type_t *pointer_type = &type->pointer;
1947                 offset                       = get_type_size(pointer_type->points_to);
1948         } else {
1949                 assert(is_type_arithmetic(type));
1950                 offset = new_Const(mode, get_mode_one(mode));
1951         }
1952
1953         ir_node *result;
1954         ir_node *store_value;
1955         switch(expression->base.kind) {
1956         case EXPR_UNARY_POSTFIX_INCREMENT:
1957                 result      = value;
1958                 store_value = new_d_Add(dbgi, value, offset, mode);
1959                 break;
1960         case EXPR_UNARY_POSTFIX_DECREMENT:
1961                 result      = value;
1962                 store_value = new_d_Sub(dbgi, value, offset, mode);
1963                 break;
1964         case EXPR_UNARY_PREFIX_INCREMENT:
1965                 result      = new_d_Add(dbgi, value, offset, mode);
1966                 store_value = result;
1967                 break;
1968         case EXPR_UNARY_PREFIX_DECREMENT:
1969                 result      = new_d_Sub(dbgi, value, offset, mode);
1970                 store_value = result;
1971                 break;
1972         default:
1973                 panic("no incdec expr in create_incdec");
1974         }
1975
1976         set_value_for_expression_addr(value_expr, store_value, addr);
1977
1978         return result;
1979 }
1980
1981 static bool is_local_variable(expression_t *expression)
1982 {
1983         if (expression->kind != EXPR_REFERENCE)
1984                 return false;
1985         reference_expression_t *ref_expr = &expression->reference;
1986         entity_t               *entity   = ref_expr->entity;
1987         if (entity->kind != ENTITY_VARIABLE)
1988                 return false;
1989         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1990         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
1991 }
1992
1993 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1994 {
1995         switch(kind) {
1996         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1997         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1998         case EXPR_BINARY_NOTEQUAL:
1999                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2000         case EXPR_BINARY_ISLESS:
2001         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2002         case EXPR_BINARY_ISLESSEQUAL:
2003         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2004         case EXPR_BINARY_ISGREATER:
2005         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2006         case EXPR_BINARY_ISGREATEREQUAL:
2007         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2008         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2009
2010         default:
2011                 break;
2012         }
2013         panic("trying to get pn_Cmp from non-comparison binexpr type");
2014 }
2015
2016 /**
2017  * Handle the assume optimizer hint: check if a Confirm
2018  * node can be created.
2019  *
2020  * @param dbi    debug info
2021  * @param expr   the IL assume expression
2022  *
2023  * we support here only some simple cases:
2024  *  - var rel const
2025  *  - const rel val
2026  *  - var rel var
2027  */
2028 static ir_node *handle_assume_compare(dbg_info *dbi,
2029                                       const binary_expression_t *expression)
2030 {
2031         expression_t *op1 = expression->left;
2032         expression_t *op2 = expression->right;
2033         entity_t     *var2, *var = NULL;
2034         ir_node      *res = NULL;
2035         pn_Cmp        cmp_val;
2036
2037         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2038
2039         if (is_local_variable(op1) && is_local_variable(op2)) {
2040         var  = op1->reference.entity;
2041             var2 = op2->reference.entity;
2042
2043                 type_t  *const type = skip_typeref(var->declaration.type);
2044                 ir_mode *const mode = get_ir_mode(type);
2045
2046                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2047                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2048
2049                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2050                 set_value(var2->variable.v.value_number, res);
2051
2052                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2053                 set_value(var->variable.v.value_number, res);
2054
2055                 return res;
2056         }
2057
2058         expression_t *con;
2059         if (is_local_variable(op1) && is_constant_expression(op2)) {
2060                 var = op1->reference.entity;
2061                 con = op2;
2062         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2063                 cmp_val = get_inversed_pnc(cmp_val);
2064                 var = op2->reference.entity;
2065                 con = op1;
2066         }
2067
2068         if (var != NULL) {
2069                 type_t  *const type = skip_typeref(var->declaration.type);
2070                 ir_mode *const mode = get_ir_mode(type);
2071
2072                 res = get_value(var->variable.v.value_number, mode);
2073                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2074                 set_value(var->variable.v.value_number, res);
2075         }
2076         return res;
2077 }
2078
2079 /**
2080  * Handle the assume optimizer hint.
2081  *
2082  * @param dbi    debug info
2083  * @param expr   the IL assume expression
2084  */
2085 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2086         switch(expression->kind) {
2087         case EXPR_BINARY_EQUAL:
2088         case EXPR_BINARY_NOTEQUAL:
2089         case EXPR_BINARY_LESS:
2090         case EXPR_BINARY_LESSEQUAL:
2091         case EXPR_BINARY_GREATER:
2092         case EXPR_BINARY_GREATEREQUAL:
2093                 return handle_assume_compare(dbi, &expression->binary);
2094         default:
2095                 return NULL;
2096         }
2097 }
2098
2099 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2100 {
2101         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2102         type_t   *type = skip_typeref(expression->base.type);
2103
2104         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2105                 return expression_to_addr(expression->value);
2106
2107         const expression_t *value = expression->value;
2108
2109         switch(expression->base.kind) {
2110         case EXPR_UNARY_NEGATE: {
2111                 ir_node *value_node = expression_to_firm(value);
2112                 ir_mode *mode = get_ir_mode(type);
2113                 return new_d_Minus(dbgi, value_node, mode);
2114         }
2115         case EXPR_UNARY_PLUS:
2116                 return expression_to_firm(value);
2117         case EXPR_UNARY_BITWISE_NEGATE: {
2118                 ir_node *value_node = expression_to_firm(value);
2119                 ir_mode *mode = get_ir_mode(type);
2120                 return new_d_Not(dbgi, value_node, mode);
2121         }
2122         case EXPR_UNARY_NOT: {
2123                 ir_node *value_node = _expression_to_firm(value);
2124                 value_node          = create_conv(dbgi, value_node, mode_b);
2125                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2126                 return res;
2127         }
2128         case EXPR_UNARY_DEREFERENCE: {
2129                 ir_node *value_node = expression_to_firm(value);
2130                 type_t  *value_type = skip_typeref(value->base.type);
2131                 assert(is_type_pointer(value_type));
2132                 type_t  *points_to  = value_type->pointer.points_to;
2133                 return deref_address(dbgi, points_to, value_node);
2134         }
2135         case EXPR_UNARY_POSTFIX_INCREMENT:
2136         case EXPR_UNARY_POSTFIX_DECREMENT:
2137         case EXPR_UNARY_PREFIX_INCREMENT:
2138         case EXPR_UNARY_PREFIX_DECREMENT:
2139                 return create_incdec(expression);
2140         case EXPR_UNARY_CAST: {
2141                 ir_node *value_node = expression_to_firm(value);
2142                 if (is_type_scalar(type)) {
2143                         ir_mode *mode = get_ir_mode(type);
2144                         ir_node *node = create_conv(dbgi, value_node, mode);
2145                         node = do_strict_conv(dbgi, node);
2146                         return node;
2147                 } else {
2148                         /* make sure firm type is constructed */
2149                         (void) get_ir_type(type);
2150                         return value_node;
2151                 }
2152         }
2153         case EXPR_UNARY_CAST_IMPLICIT: {
2154                 ir_node *value_node = expression_to_firm(value);
2155                 if (is_type_scalar(type)) {
2156                         ir_mode *mode = get_ir_mode(type);
2157                         return create_conv(dbgi, value_node, mode);
2158                 } else {
2159                         return value_node;
2160                 }
2161         }
2162         case EXPR_UNARY_ASSUME:
2163                 if (firm_opt.confirm)
2164                         return handle_assume(dbgi, value);
2165                 else
2166                         return NULL;
2167
2168         default:
2169                 break;
2170         }
2171         panic("invalid UNEXPR type found");
2172 }
2173
2174 /**
2175  * produces a 0/1 depending of the value of a mode_b node
2176  */
2177 static ir_node *produce_condition_result(const expression_t *expression,
2178                                          dbg_info *dbgi)
2179 {
2180         ir_mode *mode      = get_ir_mode(expression->base.type);
2181         ir_node *cur_block = get_cur_block();
2182
2183         ir_node *one_block = new_immBlock();
2184         ir_node *one       = new_Const(mode, get_mode_one(mode));
2185         ir_node *jmp_one   = new_d_Jmp(dbgi);
2186
2187         ir_node *zero_block = new_immBlock();
2188         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2189         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2190
2191         set_cur_block(cur_block);
2192         create_condition_evaluation(expression, one_block, zero_block);
2193         mature_immBlock(one_block);
2194         mature_immBlock(zero_block);
2195
2196         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2197         new_Block(2, in_cf);
2198
2199         ir_node *in[2] = { one, zero };
2200         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2201
2202         return val;
2203 }
2204
2205 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2206                 ir_node *value, type_t *type)
2207 {
2208         pointer_type_t *const pointer_type = &type->pointer;
2209         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2210         unsigned              elem_size    = get_type_size_const(points_to);
2211
2212         /* gcc extension: allow arithmetic with void * and function * */
2213         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2214             is_type_function(points_to))  {
2215                 elem_size = 1;
2216         }
2217
2218         assert(elem_size >= 1);
2219         if (elem_size == 1)
2220                 return value;
2221
2222         value = create_conv(dbgi, value, mode_int);
2223         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2224         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2225         return mul;
2226 }
2227
2228 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2229                           ir_node *left, ir_node *right)
2230 {
2231         ir_mode  *mode;
2232         type_t   *type_left  = skip_typeref(expression->left->base.type);
2233         type_t   *type_right = skip_typeref(expression->right->base.type);
2234
2235         expression_kind_t kind = expression->base.kind;
2236
2237         switch (kind) {
2238         case EXPR_BINARY_SHIFTLEFT:
2239         case EXPR_BINARY_SHIFTRIGHT:
2240         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2241         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2242                 mode  = get_irn_mode(left);
2243                 right = create_conv(dbgi, right, mode_uint);
2244                 break;
2245
2246         case EXPR_BINARY_SUB:
2247                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2248                         const pointer_type_t *const ptr_type = &type_left->pointer;
2249
2250                         mode = get_ir_mode(expression->base.type);
2251                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2252                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2253                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2254                         ir_node *const no_mem    = new_NoMem();
2255                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2256                                                                                                    mode, op_pin_state_floats);
2257                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2258                 }
2259                 /* fallthrough */
2260         case EXPR_BINARY_SUB_ASSIGN:
2261                 if (is_type_pointer(type_left)) {
2262                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2263                         mode  = get_ir_mode(type_left);
2264                         break;
2265                 }
2266                 goto normal_node;
2267
2268         case EXPR_BINARY_ADD:
2269         case EXPR_BINARY_ADD_ASSIGN:
2270                 if (is_type_pointer(type_left)) {
2271                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2272                         mode  = get_ir_mode(type_left);
2273                         break;
2274                 } else if (is_type_pointer(type_right)) {
2275                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2276                         mode  = get_ir_mode(type_right);
2277                         break;
2278                 }
2279                 goto normal_node;
2280
2281         default:
2282 normal_node:
2283                 mode = get_irn_mode(right);
2284                 left = create_conv(dbgi, left, mode);
2285                 break;
2286         }
2287
2288         switch (kind) {
2289         case EXPR_BINARY_ADD_ASSIGN:
2290         case EXPR_BINARY_ADD:
2291                 return new_d_Add(dbgi, left, right, mode);
2292         case EXPR_BINARY_SUB_ASSIGN:
2293         case EXPR_BINARY_SUB:
2294                 return new_d_Sub(dbgi, left, right, mode);
2295         case EXPR_BINARY_MUL_ASSIGN:
2296         case EXPR_BINARY_MUL:
2297                 return new_d_Mul(dbgi, left, right, mode);
2298         case EXPR_BINARY_BITWISE_AND:
2299         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2300                 return new_d_And(dbgi, left, right, mode);
2301         case EXPR_BINARY_BITWISE_OR:
2302         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2303                 return new_d_Or(dbgi, left, right, mode);
2304         case EXPR_BINARY_BITWISE_XOR:
2305         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2306                 return new_d_Eor(dbgi, left, right, mode);
2307         case EXPR_BINARY_SHIFTLEFT:
2308         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2309                 return new_d_Shl(dbgi, left, right, mode);
2310         case EXPR_BINARY_SHIFTRIGHT:
2311         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2312                 if (mode_is_signed(mode)) {
2313                         return new_d_Shrs(dbgi, left, right, mode);
2314                 } else {
2315                         return new_d_Shr(dbgi, left, right, mode);
2316                 }
2317         case EXPR_BINARY_DIV:
2318         case EXPR_BINARY_DIV_ASSIGN: {
2319                 ir_node *pin = new_Pin(new_NoMem());
2320                 ir_node *op;
2321                 ir_node *res;
2322                 if (mode_is_float(mode)) {
2323                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2324                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2325                 } else {
2326                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2327                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2328                 }
2329                 return res;
2330         }
2331         case EXPR_BINARY_MOD:
2332         case EXPR_BINARY_MOD_ASSIGN: {
2333                 ir_node *pin = new_Pin(new_NoMem());
2334                 assert(!mode_is_float(mode));
2335                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2336                                          op_pin_state_floats);
2337                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2338                 return res;
2339         }
2340         default:
2341                 panic("unexpected expression kind");
2342         }
2343 }
2344
2345 static ir_node *create_lazy_op(const binary_expression_t *expression)
2346 {
2347         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2348         type_t   *type = expression->base.type;
2349         ir_mode  *mode = get_ir_mode(type);
2350
2351         if (is_constant_expression(expression->left)) {
2352                 long val = fold_constant(expression->left);
2353                 expression_kind_t ekind = expression->base.kind;
2354                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2355                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2356                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2357                         return expression_to_firm(expression->right);
2358                 } else {
2359                         return new_Const(mode, get_mode_one(mode));
2360                 }
2361         }
2362
2363         return produce_condition_result((const expression_t*) expression, dbgi);
2364 }
2365
2366 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2367                                             ir_node *right, ir_mode *mode);
2368
2369 static ir_node *create_assign_binop(const binary_expression_t *expression)
2370 {
2371         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2372         const expression_t *left_expr = expression->left;
2373         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2374         ir_node            *right     = expression_to_firm(expression->right);
2375         ir_node            *left_addr = expression_to_addr(left_expr);
2376         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2377         ir_node            *result    = create_op(dbgi, expression, left, right);
2378
2379         result = create_conv(dbgi, result, left_mode);
2380         result = do_strict_conv(dbgi, result);
2381
2382         set_value_for_expression_addr(left_expr, result, left_addr);
2383
2384         return result;
2385 }
2386
2387 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2388 {
2389         expression_kind_t kind = expression->base.kind;
2390
2391         switch(kind) {
2392         case EXPR_BINARY_EQUAL:
2393         case EXPR_BINARY_NOTEQUAL:
2394         case EXPR_BINARY_LESS:
2395         case EXPR_BINARY_LESSEQUAL:
2396         case EXPR_BINARY_GREATER:
2397         case EXPR_BINARY_GREATEREQUAL:
2398         case EXPR_BINARY_ISGREATER:
2399         case EXPR_BINARY_ISGREATEREQUAL:
2400         case EXPR_BINARY_ISLESS:
2401         case EXPR_BINARY_ISLESSEQUAL:
2402         case EXPR_BINARY_ISLESSGREATER:
2403         case EXPR_BINARY_ISUNORDERED: {
2404                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2405                 ir_node *left  = expression_to_firm(expression->left);
2406                 ir_node *right = expression_to_firm(expression->right);
2407                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2408                 long     pnc   = get_pnc(kind, expression->left->base.type);
2409                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2410                 return proj;
2411         }
2412         case EXPR_BINARY_ASSIGN: {
2413                 ir_node *addr  = expression_to_addr(expression->left);
2414                 ir_node *right = expression_to_firm(expression->right);
2415                 set_value_for_expression_addr(expression->left, right, addr);
2416
2417                 return right;
2418         }
2419         case EXPR_BINARY_ADD:
2420         case EXPR_BINARY_SUB:
2421         case EXPR_BINARY_MUL:
2422         case EXPR_BINARY_DIV:
2423         case EXPR_BINARY_MOD:
2424         case EXPR_BINARY_BITWISE_AND:
2425         case EXPR_BINARY_BITWISE_OR:
2426         case EXPR_BINARY_BITWISE_XOR:
2427         case EXPR_BINARY_SHIFTLEFT:
2428         case EXPR_BINARY_SHIFTRIGHT:
2429         {
2430                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2431                 ir_node  *left  = expression_to_firm(expression->left);
2432                 ir_node  *right = expression_to_firm(expression->right);
2433                 return create_op(dbgi, expression, left, right);
2434         }
2435         case EXPR_BINARY_LOGICAL_AND:
2436         case EXPR_BINARY_LOGICAL_OR:
2437                 return create_lazy_op(expression);
2438         case EXPR_BINARY_COMMA:
2439                 /* create side effects of left side */
2440                 (void) expression_to_firm(expression->left);
2441                 return _expression_to_firm(expression->right);
2442
2443         case EXPR_BINARY_ADD_ASSIGN:
2444         case EXPR_BINARY_SUB_ASSIGN:
2445         case EXPR_BINARY_MUL_ASSIGN:
2446         case EXPR_BINARY_MOD_ASSIGN:
2447         case EXPR_BINARY_DIV_ASSIGN:
2448         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2449         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2450         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2451         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2452         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2453                 return create_assign_binop(expression);
2454         case EXPR_BINARY_BUILTIN_EXPECT:
2455                 return _expression_to_firm(expression->left);
2456         default:
2457                 panic("TODO binexpr type");
2458         }
2459 }
2460
2461 static ir_node *array_access_addr(const array_access_expression_t *expression)
2462 {
2463         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2464         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2465         ir_node  *offset    = expression_to_firm(expression->index);
2466
2467         type_t  *offset_type = skip_typeref(expression->index->base.type);
2468         ir_mode *mode;
2469         if (is_type_signed(offset_type)) {
2470                 mode = get_ir_mode(type_ssize_t);
2471         } else {
2472                 mode = get_ir_mode(type_size_t);
2473         }
2474         offset = create_conv(dbgi, offset, mode);
2475
2476         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2477         assert(is_type_pointer(ref_type));
2478         pointer_type_t *pointer_type = &ref_type->pointer;
2479
2480         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2481         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2482         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2483                                              mode);
2484         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2485
2486         return result;
2487 }
2488
2489 static ir_node *array_access_to_firm(
2490                 const array_access_expression_t *expression)
2491 {
2492         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2493         ir_node  *addr   = array_access_addr(expression);
2494         type_t   *type   = revert_automatic_type_conversion(
2495                         (const expression_t*) expression);
2496         type             = skip_typeref(type);
2497
2498         return deref_address(dbgi, type, addr);
2499 }
2500
2501 static long get_offsetof_offset(const offsetof_expression_t *expression)
2502 {
2503         type_t *orig_type = expression->type;
2504         long    offset    = 0;
2505
2506         designator_t *designator = expression->designator;
2507         for ( ; designator != NULL; designator = designator->next) {
2508                 type_t *type = skip_typeref(orig_type);
2509                 /* be sure the type is constructed */
2510                 (void) get_ir_type(type);
2511
2512                 if (designator->symbol != NULL) {
2513                         assert(is_type_compound(type));
2514                         symbol_t *symbol = designator->symbol;
2515
2516                         compound_t *compound = type->compound.compound;
2517                         entity_t   *iter     = compound->members.entities;
2518                         for ( ; iter != NULL; iter = iter->base.next) {
2519                                 if (iter->base.symbol == symbol) {
2520                                         break;
2521                                 }
2522                         }
2523                         assert(iter != NULL);
2524
2525                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2526                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2527                         offset += get_entity_offset(iter->compound_member.entity);
2528
2529                         orig_type = iter->declaration.type;
2530                 } else {
2531                         expression_t *array_index = designator->array_index;
2532                         assert(designator->array_index != NULL);
2533                         assert(is_type_array(type));
2534
2535                         long index         = fold_constant(array_index);
2536                         ir_type *arr_type  = get_ir_type(type);
2537                         ir_type *elem_type = get_array_element_type(arr_type);
2538                         long     elem_size = get_type_size_bytes(elem_type);
2539
2540                         offset += index * elem_size;
2541
2542                         orig_type = type->array.element_type;
2543                 }
2544         }
2545
2546         return offset;
2547 }
2548
2549 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2550 {
2551         ir_mode  *mode   = get_ir_mode(expression->base.type);
2552         long      offset = get_offsetof_offset(expression);
2553         tarval   *tv     = new_tarval_from_long(offset, mode);
2554         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2555
2556         return new_d_Const(dbgi, mode, tv);
2557 }
2558
2559 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2560                                      ir_entity *entity, type_t *type);
2561
2562 static ir_node *compound_literal_to_firm(
2563                 const compound_literal_expression_t *expression)
2564 {
2565         type_t *type = expression->type;
2566
2567         /* create an entity on the stack */
2568         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2569
2570         ident     *const id     = id_unique("CompLit.%u");
2571         ir_type   *const irtype = get_ir_type(type);
2572         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2573         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2574         set_entity_ld_ident(entity, id);
2575
2576         set_entity_variability(entity, variability_uninitialized);
2577
2578         /* create initialisation code */
2579         initializer_t *initializer = expression->initializer;
2580         create_local_initializer(initializer, dbgi, entity, type);
2581
2582         /* create a sel for the compound literal address */
2583         ir_node *frame = get_local_frame(entity);
2584         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2585         return sel;
2586 }
2587
2588 /**
2589  * Transform a sizeof expression into Firm code.
2590  */
2591 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2592 {
2593         type_t *type = expression->type;
2594         if (type == NULL) {
2595                 type = expression->tp_expression->base.type;
2596                 assert(type != NULL);
2597         }
2598
2599         type = skip_typeref(type);
2600         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2601         if (is_type_array(type) && type->array.is_vla
2602                         && expression->tp_expression != NULL) {
2603                 expression_to_firm(expression->tp_expression);
2604         }
2605
2606         return get_type_size(type);
2607 }
2608
2609 /**
2610  * Transform an alignof expression into Firm code.
2611  */
2612 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2613 {
2614         type_t *type = expression->type;
2615         if (type == NULL) {
2616                 /* beware: if expression is a variable reference, return the
2617                    alignment of the variable. */
2618                 const expression_t *tp_expression = expression->tp_expression;
2619                 const entity_t     *entity        = expression_is_variable(tp_expression);
2620                 if (entity != NULL) {
2621                         /* TODO: get the alignment of this variable. */
2622                         (void) entity;
2623                 }
2624                 type = tp_expression->base.type;
2625                 assert(type != NULL);
2626         }
2627
2628         ir_mode *const mode = get_ir_mode(expression->base.type);
2629         symconst_symbol sym;
2630         sym.type_p = get_ir_type(type);
2631         return new_SymConst(mode, sym, symconst_type_align);
2632 }
2633
2634 static void init_ir_types(void);
2635
2636 long fold_constant(const expression_t *expression)
2637 {
2638         assert(is_type_valid(skip_typeref(expression->base.type)));
2639
2640         bool constant_folding_old = constant_folding;
2641         constant_folding = true;
2642
2643         init_ir_types();
2644
2645         assert(is_constant_expression(expression));
2646
2647         ir_graph *old_current_ir_graph = current_ir_graph;
2648         if (current_ir_graph == NULL) {
2649                 current_ir_graph = get_const_code_irg();
2650         }
2651
2652         ir_node *cnst = expression_to_firm(expression);
2653         current_ir_graph = old_current_ir_graph;
2654
2655         if (!is_Const(cnst)) {
2656                 panic("couldn't fold constant\n");
2657         }
2658
2659         tarval *tv = get_Const_tarval(cnst);
2660         if (!tarval_is_long(tv)) {
2661                 panic("result of constant folding is not integer\n");
2662         }
2663
2664         constant_folding = constant_folding_old;
2665
2666         return get_tarval_long(tv);
2667 }
2668
2669 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2670 {
2671         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2672
2673         /* first try to fold a constant condition */
2674         if (is_constant_expression(expression->condition)) {
2675                 long val = fold_constant(expression->condition);
2676                 if (val) {
2677                         expression_t *true_expression = expression->true_expression;
2678                         if (true_expression == NULL)
2679                                 true_expression = expression->condition;
2680                         return expression_to_firm(true_expression);
2681                 } else {
2682                         return expression_to_firm(expression->false_expression);
2683                 }
2684         }
2685
2686         ir_node *cur_block   = get_cur_block();
2687
2688         /* create the true block */
2689         ir_node *true_block  = new_immBlock();
2690
2691         ir_node *true_val = expression->true_expression != NULL ?
2692                 expression_to_firm(expression->true_expression) : NULL;
2693         ir_node *true_jmp = new_Jmp();
2694
2695         /* create the false block */
2696         ir_node *false_block = new_immBlock();
2697
2698         ir_node *false_val = expression_to_firm(expression->false_expression);
2699         ir_node *false_jmp = new_Jmp();
2700
2701         /* create the condition evaluation */
2702         set_cur_block(cur_block);
2703         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2704         if (expression->true_expression == NULL) {
2705                 if (cond_expr != NULL) {
2706                         true_val = cond_expr;
2707                 } else {
2708                         /* Condition ended with a short circuit (&&, ||, !) operation.
2709                          * Generate a "1" as value for the true branch. */
2710                         ir_mode *const mode = mode_Is;
2711                         true_val = new_Const(mode, get_mode_one(mode));
2712                 }
2713         }
2714         mature_immBlock(true_block);
2715         mature_immBlock(false_block);
2716
2717         /* create the common block */
2718         ir_node *in_cf[2] = { true_jmp, false_jmp };
2719         new_Block(2, in_cf);
2720
2721         /* TODO improve static semantics, so either both or no values are NULL */
2722         if (true_val == NULL || false_val == NULL)
2723                 return NULL;
2724
2725         ir_node *in[2] = { true_val, false_val };
2726         ir_mode *mode  = get_irn_mode(true_val);
2727         assert(get_irn_mode(false_val) == mode);
2728         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2729
2730         return val;
2731 }
2732
2733 /**
2734  * Returns an IR-node representing the address of a field.
2735  */
2736 static ir_node *select_addr(const select_expression_t *expression)
2737 {
2738         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2739
2740         construct_select_compound(expression);
2741
2742         ir_node *compound_addr = expression_to_firm(expression->compound);
2743
2744         entity_t *entry = expression->compound_entry;
2745         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2746         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2747         ir_entity *irentity = entry->compound_member.entity;
2748
2749         assert(irentity != NULL);
2750
2751         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2752
2753         return sel;
2754 }
2755
2756 static ir_node *select_to_firm(const select_expression_t *expression)
2757 {
2758         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2759         ir_node  *addr = select_addr(expression);
2760         type_t   *type = revert_automatic_type_conversion(
2761                         (const expression_t*) expression);
2762         type           = skip_typeref(type);
2763
2764         entity_t *entry      = expression->compound_entry;
2765         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2766         type_t   *entry_type = skip_typeref(entry->declaration.type);
2767
2768         if (entry_type->kind == TYPE_BITFIELD) {
2769                 return bitfield_extract_to_firm(expression, addr);
2770         }
2771
2772         return deref_address(dbgi, type, addr);
2773 }
2774
2775 /* Values returned by __builtin_classify_type. */
2776 typedef enum gcc_type_class
2777 {
2778         no_type_class = -1,
2779         void_type_class,
2780         integer_type_class,
2781         char_type_class,
2782         enumeral_type_class,
2783         boolean_type_class,
2784         pointer_type_class,
2785         reference_type_class,
2786         offset_type_class,
2787         real_type_class,
2788         complex_type_class,
2789         function_type_class,
2790         method_type_class,
2791         record_type_class,
2792         union_type_class,
2793         array_type_class,
2794         string_type_class,
2795         set_type_class,
2796         file_type_class,
2797         lang_type_class
2798 } gcc_type_class;
2799
2800 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2801 {
2802         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2803
2804         gcc_type_class tc;
2805         switch (type->kind)
2806         {
2807                 case TYPE_ATOMIC: {
2808                         const atomic_type_t *const atomic_type = &type->atomic;
2809                         switch (atomic_type->akind) {
2810                                 /* should not be reached */
2811                                 case ATOMIC_TYPE_INVALID:
2812                                         tc = no_type_class;
2813                                         goto make_const;
2814
2815                                 /* gcc cannot do that */
2816                                 case ATOMIC_TYPE_VOID:
2817                                         tc = void_type_class;
2818                                         goto make_const;
2819
2820                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2821                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2822                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2823                                 case ATOMIC_TYPE_SHORT:
2824                                 case ATOMIC_TYPE_USHORT:
2825                                 case ATOMIC_TYPE_INT:
2826                                 case ATOMIC_TYPE_UINT:
2827                                 case ATOMIC_TYPE_LONG:
2828                                 case ATOMIC_TYPE_ULONG:
2829                                 case ATOMIC_TYPE_LONGLONG:
2830                                 case ATOMIC_TYPE_ULONGLONG:
2831                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2832                                         tc = integer_type_class;
2833                                         goto make_const;
2834
2835                                 case ATOMIC_TYPE_FLOAT:
2836                                 case ATOMIC_TYPE_DOUBLE:
2837                                 case ATOMIC_TYPE_LONG_DOUBLE:
2838                                         tc = real_type_class;
2839                                         goto make_const;
2840                         }
2841                         panic("Unexpected atomic type in classify_type_to_firm().");
2842                 }
2843
2844                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2845                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2846                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2847                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2848                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2849                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2850                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2851                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2852
2853                 /* gcc handles this as integer */
2854                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2855
2856                 case TYPE_BUILTIN:
2857                 /* typedef/typeof should be skipped already */
2858                 case TYPE_TYPEDEF:
2859                 case TYPE_TYPEOF:
2860                 case TYPE_INVALID:
2861                 case TYPE_ERROR:
2862                         break;
2863         }
2864         panic("unexpected TYPE classify_type_to_firm().");
2865
2866 make_const: ;
2867         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2868         ir_mode  *const mode = mode_int;
2869         tarval   *const tv   = new_tarval_from_long(tc, mode);
2870         return new_d_Const(dbgi, mode, tv);
2871 }
2872
2873 static ir_node *function_name_to_firm(
2874                 const funcname_expression_t *const expr)
2875 {
2876         switch(expr->kind) {
2877         case FUNCNAME_FUNCTION:
2878         case FUNCNAME_PRETTY_FUNCTION:
2879         case FUNCNAME_FUNCDNAME:
2880                 if (current_function_name == NULL) {
2881                         const source_position_t *const src_pos = &expr->base.source_position;
2882                         const char    *name  = current_function_entity->base.symbol->string;
2883                         const string_t string = { name, strlen(name) + 1 };
2884                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2885                 }
2886                 return current_function_name;
2887         case FUNCNAME_FUNCSIG:
2888                 if (current_funcsig == NULL) {
2889                         const source_position_t *const src_pos = &expr->base.source_position;
2890                         ir_entity *ent = get_irg_entity(current_ir_graph);
2891                         const char *const name = get_entity_ld_name(ent);
2892                         const string_t string = { name, strlen(name) + 1 };
2893                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2894                 }
2895                 return current_funcsig;
2896         }
2897         panic("Unsupported function name");
2898 }
2899
2900 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2901 {
2902         statement_t *statement = expr->statement;
2903
2904         assert(statement->kind == STATEMENT_COMPOUND);
2905         return compound_statement_to_firm(&statement->compound);
2906 }
2907
2908 static ir_node *va_start_expression_to_firm(
2909         const va_start_expression_t *const expr)
2910 {
2911         type_t    *const type        = current_function_entity->declaration.type;
2912         ir_type   *const method_type = get_ir_type(type);
2913         int        const n           = get_method_n_params(method_type) - 1;
2914         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2915         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2916         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2917         ir_node   *const no_mem      = new_NoMem();
2918         ir_node   *const arg_sel     =
2919                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2920
2921         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2922         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2923         set_value_for_expression(expr->ap, add);
2924
2925         return NULL;
2926 }
2927
2928 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2929 {
2930         type_t       *const type    = expr->base.type;
2931         expression_t *const ap_expr = expr->ap;
2932         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2933         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2934         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2935         ir_node      *const res     = deref_address(dbgi, type, ap);
2936
2937         ir_node      *const cnst    = get_type_size(expr->base.type);
2938         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2939
2940         set_value_for_expression_addr(ap_expr, add, ap_addr);
2941
2942         return res;
2943 }
2944
2945 static ir_node *dereference_addr(const unary_expression_t *const expression)
2946 {
2947         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2948         return expression_to_firm(expression->value);
2949 }
2950
2951 /**
2952  * Returns a IR-node representing an lvalue of the given expression.
2953  */
2954 static ir_node *expression_to_addr(const expression_t *expression)
2955 {
2956         switch(expression->kind) {
2957         case EXPR_REFERENCE:
2958                 return reference_addr(&expression->reference);
2959         case EXPR_ARRAY_ACCESS:
2960                 return array_access_addr(&expression->array_access);
2961         case EXPR_SELECT:
2962                 return select_addr(&expression->select);
2963         case EXPR_CALL:
2964                 return call_expression_to_firm(&expression->call);
2965         case EXPR_UNARY_DEREFERENCE: {
2966                 return dereference_addr(&expression->unary);
2967         }
2968         default:
2969                 break;
2970         }
2971         panic("trying to get address of non-lvalue");
2972 }
2973
2974 static ir_node *builtin_constant_to_firm(
2975                 const builtin_constant_expression_t *expression)
2976 {
2977         ir_mode *mode = get_ir_mode(expression->base.type);
2978         long     v;
2979
2980         if (is_constant_expression(expression->value)) {
2981                 v = 1;
2982         } else {
2983                 v = 0;
2984         }
2985         return new_Const_long(mode, v);
2986 }
2987
2988 static ir_node *builtin_prefetch_to_firm(
2989                 const builtin_prefetch_expression_t *expression)
2990 {
2991         ir_node *adr = expression_to_firm(expression->adr);
2992         /* no Firm support for prefetch yet */
2993         (void) adr;
2994         return NULL;
2995 }
2996
2997 static ir_node *get_label_block(label_t *label)
2998 {
2999         if (label->block != NULL)
3000                 return label->block;
3001
3002         /* beware: might be called from create initializer with current_ir_graph
3003          * set to const_code_irg. */
3004         ir_graph *rem    = current_ir_graph;
3005         current_ir_graph = current_function;
3006
3007         ir_node *old_cur_block = get_cur_block();
3008         ir_node *block         = new_immBlock();
3009         set_cur_block(old_cur_block);
3010
3011         label->block = block;
3012
3013         ARR_APP1(label_t *, all_labels, label);
3014
3015         current_ir_graph = rem;
3016         return block;
3017 }
3018
3019 /**
3020  * Pointer to a label.  This is used for the
3021  * GNU address-of-label extension.
3022  */
3023 static ir_node *label_address_to_firm(
3024                 const label_address_expression_t *label)
3025 {
3026         ir_node    *block = get_label_block(label->label);
3027         ir_label_t  nr    = get_Block_label(block);
3028
3029         if (nr == 0) {
3030                 nr = get_irp_next_label_nr();
3031                 set_Block_label(block, nr);
3032         }
3033         symconst_symbol value;
3034         value.label = nr;
3035         return new_SymConst(mode_P_code, value, symconst_label);
3036 }
3037
3038 /**
3039  * creates firm nodes for an expression. The difference between this function
3040  * and expression_to_firm is, that this version might produce mode_b nodes
3041  * instead of mode_Is.
3042  */
3043 static ir_node *_expression_to_firm(const expression_t *expression)
3044 {
3045 #ifndef NDEBUG
3046         if (!constant_folding) {
3047                 assert(!expression->base.transformed);
3048                 ((expression_t*) expression)->base.transformed = true;
3049         }
3050 #endif
3051
3052         switch (expression->kind) {
3053         case EXPR_CHARACTER_CONSTANT:
3054                 return character_constant_to_firm(&expression->conste);
3055         case EXPR_WIDE_CHARACTER_CONSTANT:
3056                 return wide_character_constant_to_firm(&expression->conste);
3057         case EXPR_CONST:
3058                 return const_to_firm(&expression->conste);
3059         case EXPR_STRING_LITERAL:
3060                 return string_literal_to_firm(&expression->string);
3061         case EXPR_WIDE_STRING_LITERAL:
3062                 return wide_string_literal_to_firm(&expression->wide_string);
3063         case EXPR_REFERENCE:
3064                 return reference_expression_to_firm(&expression->reference);
3065         case EXPR_REFERENCE_ENUM_VALUE:
3066                 return reference_expression_enum_value_to_firm(&expression->reference);
3067         case EXPR_CALL:
3068                 return call_expression_to_firm(&expression->call);
3069         EXPR_UNARY_CASES
3070                 return unary_expression_to_firm(&expression->unary);
3071         EXPR_BINARY_CASES
3072                 return binary_expression_to_firm(&expression->binary);
3073         case EXPR_ARRAY_ACCESS:
3074                 return array_access_to_firm(&expression->array_access);
3075         case EXPR_SIZEOF:
3076                 return sizeof_to_firm(&expression->typeprop);
3077         case EXPR_ALIGNOF:
3078                 return alignof_to_firm(&expression->typeprop);
3079         case EXPR_CONDITIONAL:
3080                 return conditional_to_firm(&expression->conditional);
3081         case EXPR_SELECT:
3082                 return select_to_firm(&expression->select);
3083         case EXPR_CLASSIFY_TYPE:
3084                 return classify_type_to_firm(&expression->classify_type);
3085         case EXPR_FUNCNAME:
3086                 return function_name_to_firm(&expression->funcname);
3087         case EXPR_STATEMENT:
3088                 return statement_expression_to_firm(&expression->statement);
3089         case EXPR_VA_START:
3090                 return va_start_expression_to_firm(&expression->va_starte);
3091         case EXPR_VA_ARG:
3092                 return va_arg_expression_to_firm(&expression->va_arge);
3093         case EXPR_BUILTIN_SYMBOL:
3094                 panic("unimplemented expression found");
3095         case EXPR_BUILTIN_CONSTANT_P:
3096                 return builtin_constant_to_firm(&expression->builtin_constant);
3097         case EXPR_BUILTIN_PREFETCH:
3098                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3099         case EXPR_OFFSETOF:
3100                 return offsetof_to_firm(&expression->offsetofe);
3101         case EXPR_COMPOUND_LITERAL:
3102                 return compound_literal_to_firm(&expression->compound_literal);
3103         case EXPR_LABEL_ADDRESS:
3104                 return label_address_to_firm(&expression->label_address);
3105
3106         case EXPR_UNKNOWN:
3107         case EXPR_INVALID:
3108                 break;
3109         }
3110         panic("invalid expression found");
3111 }
3112
3113 static bool produces_mode_b(const expression_t *expression)
3114 {
3115         switch (expression->kind) {
3116         case EXPR_BINARY_EQUAL:
3117         case EXPR_BINARY_NOTEQUAL:
3118         case EXPR_BINARY_LESS:
3119         case EXPR_BINARY_LESSEQUAL:
3120         case EXPR_BINARY_GREATER:
3121         case EXPR_BINARY_GREATEREQUAL:
3122         case EXPR_BINARY_ISGREATER:
3123         case EXPR_BINARY_ISGREATEREQUAL:
3124         case EXPR_BINARY_ISLESS:
3125         case EXPR_BINARY_ISLESSEQUAL:
3126         case EXPR_BINARY_ISLESSGREATER:
3127         case EXPR_BINARY_ISUNORDERED:
3128         case EXPR_UNARY_NOT:
3129                 return true;
3130
3131         case EXPR_BINARY_BUILTIN_EXPECT:
3132                 return produces_mode_b(expression->binary.left);
3133         case EXPR_BINARY_COMMA:
3134                 return produces_mode_b(expression->binary.right);
3135
3136         default:
3137                 return false;
3138         }
3139 }
3140
3141 static ir_node *expression_to_firm(const expression_t *expression)
3142 {
3143         if (!produces_mode_b(expression)) {
3144                 ir_node *res = _expression_to_firm(expression);
3145                 assert(res == NULL || get_irn_mode(res) != mode_b);
3146                 return res;
3147         }
3148
3149         if (is_constant_expression(expression)) {
3150                 ir_node *res  = _expression_to_firm(expression);
3151                 ir_mode *mode = get_ir_mode(expression->base.type);
3152                 assert(is_Const(res));
3153                 if (is_Const_null(res)) {
3154                         return new_Const_long(mode, 0);
3155                 } else {
3156                         return new_Const_long(mode, 1);
3157                 }
3158         }
3159
3160         /* we have to produce a 0/1 from the mode_b expression */
3161         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3162         return produce_condition_result(expression, dbgi);
3163 }
3164
3165 /**
3166  * create a short-circuit expression evaluation that tries to construct
3167  * efficient control flow structures for &&, || and ! expressions
3168  */
3169 static ir_node *create_condition_evaluation(const expression_t *expression,
3170                                             ir_node *true_block,
3171                                             ir_node *false_block)
3172 {
3173         switch(expression->kind) {
3174         case EXPR_UNARY_NOT: {
3175                 const unary_expression_t *unary_expression = &expression->unary;
3176                 create_condition_evaluation(unary_expression->value, false_block,
3177                                             true_block);
3178                 return NULL;
3179         }
3180         case EXPR_BINARY_LOGICAL_AND: {
3181                 const binary_expression_t *binary_expression = &expression->binary;
3182
3183                 ir_node *cur_block   = get_cur_block();
3184                 ir_node *extra_block = new_immBlock();
3185                 set_cur_block(cur_block);
3186                 create_condition_evaluation(binary_expression->left, extra_block,
3187                                             false_block);
3188                 mature_immBlock(extra_block);
3189                 set_cur_block(extra_block);
3190                 create_condition_evaluation(binary_expression->right, true_block,
3191                                             false_block);
3192                 return NULL;
3193         }
3194         case EXPR_BINARY_LOGICAL_OR: {
3195                 const binary_expression_t *binary_expression = &expression->binary;
3196
3197                 ir_node *cur_block   = get_cur_block();
3198                 ir_node *extra_block = new_immBlock();
3199                 set_cur_block(cur_block);
3200                 create_condition_evaluation(binary_expression->left, true_block,
3201                                             extra_block);
3202                 mature_immBlock(extra_block);
3203                 set_cur_block(extra_block);
3204                 create_condition_evaluation(binary_expression->right, true_block,
3205                                             false_block);
3206                 return NULL;
3207         }
3208         default:
3209                 break;
3210         }
3211
3212         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3213         ir_node  *cond_expr  = _expression_to_firm(expression);
3214         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3215         ir_node  *cond       = new_d_Cond(dbgi, condition);
3216         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3217         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3218
3219         /* set branch prediction info based on __builtin_expect */
3220         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3221                 long               cnst = fold_constant(expression->binary.right);
3222                 cond_jmp_predicate pred;
3223
3224                 if (cnst == 0) {
3225                         pred = COND_JMP_PRED_FALSE;
3226                 } else {
3227                         pred = COND_JMP_PRED_TRUE;
3228                 }
3229                 set_Cond_jmp_pred(cond, pred);
3230         }
3231
3232         add_immBlock_pred(true_block, true_proj);
3233         if (false_block != NULL) {
3234                 add_immBlock_pred(false_block, false_proj);
3235         }
3236
3237         set_cur_block(NULL);
3238         return cond_expr;
3239 }
3240
3241
3242 static void create_variable_entity(entity_t *variable,
3243                                    declaration_kind_t declaration_kind,
3244                                    ir_type *parent_type)
3245 {
3246         assert(variable->kind == ENTITY_VARIABLE);
3247         type_t    *const type     = skip_typeref(variable->declaration.type);
3248         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3249         ir_type   *const irtype   = get_ir_type(type);
3250         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3251         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3252
3253         handle_gnu_attributes_ent(irentity, variable);
3254
3255         variable->declaration.kind  = (unsigned char) declaration_kind;
3256         variable->variable.v.entity = irentity;
3257         set_entity_variability(irentity, variability_uninitialized);
3258         set_entity_ld_ident(irentity, create_ld_ident(variable));
3259         if (parent_type == get_tls_type())
3260                 set_entity_allocation(irentity, allocation_automatic);
3261         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3262                 set_entity_allocation(irentity, allocation_static);
3263
3264         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3265                 set_entity_volatility(irentity, volatility_is_volatile);
3266         }
3267 }
3268
3269
3270 typedef struct type_path_entry_t type_path_entry_t;
3271 struct type_path_entry_t {
3272         type_t           *type;
3273         ir_initializer_t *initializer;
3274         size_t            index;
3275         entity_t         *compound_entry;
3276 };
3277
3278 typedef struct type_path_t type_path_t;
3279 struct type_path_t {
3280         type_path_entry_t *path;
3281         type_t            *top_type;
3282         bool               invalid;
3283 };
3284
3285 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3286 {
3287         size_t len = ARR_LEN(path->path);
3288
3289         for (size_t i = 0; i < len; ++i) {
3290                 const type_path_entry_t *entry = & path->path[i];
3291
3292                 type_t *type = skip_typeref(entry->type);
3293                 if (is_type_compound(type)) {
3294                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3295                 } else if (is_type_array(type)) {
3296                         fprintf(stderr, "[%zu]", entry->index);
3297                 } else {
3298                         fprintf(stderr, "-INVALID-");
3299                 }
3300         }
3301         fprintf(stderr, "  (");
3302         print_type(path->top_type);
3303         fprintf(stderr, ")");
3304 }
3305
3306 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3307 {
3308         size_t len = ARR_LEN(path->path);
3309         assert(len > 0);
3310         return & path->path[len-1];
3311 }
3312
3313 static type_path_entry_t *append_to_type_path(type_path_t *path)
3314 {
3315         size_t len = ARR_LEN(path->path);
3316         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3317
3318         type_path_entry_t *result = & path->path[len];
3319         memset(result, 0, sizeof(result[0]));
3320         return result;
3321 }
3322
3323 static size_t get_compound_member_count(const compound_type_t *type)
3324 {
3325         compound_t *compound  = type->compound;
3326         size_t      n_members = 0;
3327         entity_t   *member    = compound->members.entities;
3328         for ( ; member != NULL; member = member->base.next) {
3329                 ++n_members;
3330         }
3331
3332         return n_members;
3333 }
3334
3335 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3336 {
3337         type_t *orig_top_type = path->top_type;
3338         type_t *top_type      = skip_typeref(orig_top_type);
3339
3340         assert(is_type_compound(top_type) || is_type_array(top_type));
3341
3342         if (ARR_LEN(path->path) == 0) {
3343                 return NULL;
3344         } else {
3345                 type_path_entry_t *top         = get_type_path_top(path);
3346                 ir_initializer_t  *initializer = top->initializer;
3347                 return get_initializer_compound_value(initializer, top->index);
3348         }
3349 }
3350
3351 static void descend_into_subtype(type_path_t *path)
3352 {
3353         type_t *orig_top_type = path->top_type;
3354         type_t *top_type      = skip_typeref(orig_top_type);
3355
3356         assert(is_type_compound(top_type) || is_type_array(top_type));
3357
3358         ir_initializer_t *initializer = get_initializer_entry(path);
3359
3360         type_path_entry_t *top = append_to_type_path(path);
3361         top->type              = top_type;
3362
3363         size_t len;
3364
3365         if (is_type_compound(top_type)) {
3366                 compound_t *compound = top_type->compound.compound;
3367                 entity_t   *entry    = compound->members.entities;
3368
3369                 top->compound_entry = entry;
3370                 top->index          = 0;
3371                 len                 = get_compound_member_count(&top_type->compound);
3372                 if (entry != NULL) {
3373                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3374                         path->top_type = entry->declaration.type;
3375                 }
3376         } else {
3377                 assert(is_type_array(top_type));
3378                 assert(top_type->array.size > 0);
3379
3380                 top->index     = 0;
3381                 path->top_type = top_type->array.element_type;
3382                 len            = top_type->array.size;
3383         }
3384         if (initializer == NULL
3385                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3386                 initializer = create_initializer_compound(len);
3387                 /* we have to set the entry at the 2nd latest path entry... */
3388                 size_t path_len = ARR_LEN(path->path);
3389                 assert(path_len >= 1);
3390                 if (path_len > 1) {
3391                         type_path_entry_t *entry        = & path->path[path_len-2];
3392                         ir_initializer_t  *tinitializer = entry->initializer;
3393                         set_initializer_compound_value(tinitializer, entry->index,
3394                                                        initializer);
3395                 }
3396         }
3397         top->initializer = initializer;
3398 }
3399
3400 static void ascend_from_subtype(type_path_t *path)
3401 {
3402         type_path_entry_t *top = get_type_path_top(path);
3403
3404         path->top_type = top->type;
3405
3406         size_t len = ARR_LEN(path->path);
3407         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3408 }
3409
3410 static void walk_designator(type_path_t *path, const designator_t *designator)
3411 {
3412         /* designators start at current object type */
3413         ARR_RESIZE(type_path_entry_t, path->path, 1);
3414
3415         for ( ; designator != NULL; designator = designator->next) {
3416                 type_path_entry_t *top         = get_type_path_top(path);
3417                 type_t            *orig_type   = top->type;
3418                 type_t            *type        = skip_typeref(orig_type);
3419
3420                 if (designator->symbol != NULL) {
3421                         assert(is_type_compound(type));
3422                         size_t    index  = 0;
3423                         symbol_t *symbol = designator->symbol;
3424
3425                         compound_t *compound = type->compound.compound;
3426                         entity_t   *iter     = compound->members.entities;
3427                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3428                                 if (iter->base.symbol == symbol) {
3429                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3430                                         break;
3431                                 }
3432                         }
3433                         assert(iter != NULL);
3434
3435                         top->type           = orig_type;
3436                         top->compound_entry = iter;
3437                         top->index          = index;
3438                         orig_type           = iter->declaration.type;
3439                 } else {
3440                         expression_t *array_index = designator->array_index;
3441                         assert(designator->array_index != NULL);
3442                         assert(is_type_array(type));
3443
3444                         long index = fold_constant(array_index);
3445                         assert(index >= 0);
3446 #ifndef NDEBUG
3447                         if (type->array.size_constant) {
3448                                 long array_size = type->array.size;
3449                                 assert(index < array_size);
3450                         }
3451 #endif
3452
3453                         top->type  = orig_type;
3454                         top->index = (size_t) index;
3455                         orig_type  = type->array.element_type;
3456                 }
3457                 path->top_type = orig_type;
3458
3459                 if (designator->next != NULL) {
3460                         descend_into_subtype(path);
3461                 }
3462         }
3463
3464         path->invalid  = false;
3465 }
3466
3467 static void advance_current_object(type_path_t *path)
3468 {
3469         if (path->invalid) {
3470                 /* TODO: handle this... */
3471                 panic("invalid initializer in ast2firm (excessive elements)");
3472                 return;
3473         }
3474
3475         type_path_entry_t *top = get_type_path_top(path);
3476
3477         type_t *type = skip_typeref(top->type);
3478         if (is_type_union(type)) {
3479                 top->compound_entry = NULL;
3480         } else if (is_type_struct(type)) {
3481                 entity_t *entry = top->compound_entry;
3482
3483                 top->index++;
3484                 entry               = entry->base.next;
3485                 top->compound_entry = entry;
3486                 if (entry != NULL) {
3487                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3488                         path->top_type = entry->declaration.type;
3489                         return;
3490                 }
3491         } else {
3492                 assert(is_type_array(type));
3493
3494                 top->index++;
3495                 if (!type->array.size_constant || top->index < type->array.size) {
3496                         return;
3497                 }
3498         }
3499
3500         /* we're past the last member of the current sub-aggregate, try if we
3501          * can ascend in the type hierarchy and continue with another subobject */
3502         size_t len = ARR_LEN(path->path);
3503
3504         if (len > 1) {
3505                 ascend_from_subtype(path);
3506                 advance_current_object(path);
3507         } else {
3508                 path->invalid = true;
3509         }
3510 }
3511
3512
3513 static ir_initializer_t *create_ir_initializer(
3514                 const initializer_t *initializer, type_t *type);
3515
3516 static ir_initializer_t *create_ir_initializer_value(
3517                 const initializer_value_t *initializer)
3518 {
3519         if (is_type_compound(initializer->value->base.type)) {
3520                 panic("initializer creation for compounds not implemented yet");
3521         }
3522         ir_node *value = expression_to_firm(initializer->value);
3523         return create_initializer_const(value);
3524 }
3525
3526 /** test wether type can be initialized by a string constant */
3527 static bool is_string_type(type_t *type)
3528 {
3529         type_t *inner;
3530         if (is_type_pointer(type)) {
3531                 inner = skip_typeref(type->pointer.points_to);
3532         } else if(is_type_array(type)) {
3533                 inner = skip_typeref(type->array.element_type);
3534         } else {
3535                 return false;
3536         }
3537
3538         return is_type_integer(inner);
3539 }
3540
3541 static ir_initializer_t *create_ir_initializer_list(
3542                 const initializer_list_t *initializer, type_t *type)
3543 {
3544         type_path_t path;
3545         memset(&path, 0, sizeof(path));
3546         path.top_type = type;
3547         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3548
3549         descend_into_subtype(&path);
3550
3551         for (size_t i = 0; i < initializer->len; ++i) {
3552                 const initializer_t *sub_initializer = initializer->initializers[i];
3553
3554                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3555                         walk_designator(&path, sub_initializer->designator.designator);
3556                         continue;
3557                 }
3558
3559                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3560                         /* we might have to descend into types until we're at a scalar
3561                          * type */
3562                         while(true) {
3563                                 type_t *orig_top_type = path.top_type;
3564                                 type_t *top_type      = skip_typeref(orig_top_type);
3565
3566                                 if (is_type_scalar(top_type))
3567                                         break;
3568                                 descend_into_subtype(&path);
3569                         }
3570                 } else if (sub_initializer->kind == INITIALIZER_STRING
3571                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3572                         /* we might have to descend into types until we're at a scalar
3573                          * type */
3574                         while (true) {
3575                                 type_t *orig_top_type = path.top_type;
3576                                 type_t *top_type      = skip_typeref(orig_top_type);
3577
3578                                 if (is_string_type(top_type))
3579                                         break;
3580                                 descend_into_subtype(&path);
3581                         }
3582                 }
3583
3584                 ir_initializer_t *sub_irinitializer
3585                         = create_ir_initializer(sub_initializer, path.top_type);
3586
3587                 size_t path_len = ARR_LEN(path.path);
3588                 assert(path_len >= 1);
3589                 type_path_entry_t *entry        = & path.path[path_len-1];
3590                 ir_initializer_t  *tinitializer = entry->initializer;
3591                 set_initializer_compound_value(tinitializer, entry->index,
3592                                                sub_irinitializer);
3593
3594                 advance_current_object(&path);
3595         }
3596
3597         assert(ARR_LEN(path.path) >= 1);
3598         ir_initializer_t *result = path.path[0].initializer;
3599         DEL_ARR_F(path.path);
3600
3601         return result;
3602 }
3603
3604 static ir_initializer_t *create_ir_initializer_string(
3605                 const initializer_string_t *initializer, type_t *type)
3606 {
3607         type = skip_typeref(type);
3608
3609         size_t            string_len    = initializer->string.size;
3610         assert(type->kind == TYPE_ARRAY);
3611         assert(type->array.size_constant);
3612         size_t            len           = type->array.size;
3613         ir_initializer_t *irinitializer = create_initializer_compound(len);
3614
3615         const char *string = initializer->string.begin;
3616         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3617
3618         for (size_t i = 0; i < len; ++i) {
3619                 char c = 0;
3620                 if (i < string_len)
3621                         c = string[i];
3622
3623                 tarval           *tv = new_tarval_from_long(c, mode);
3624                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3625
3626                 set_initializer_compound_value(irinitializer, i, char_initializer);
3627         }
3628
3629         return irinitializer;
3630 }
3631
3632 static ir_initializer_t *create_ir_initializer_wide_string(
3633                 const initializer_wide_string_t *initializer, type_t *type)
3634 {
3635         size_t            string_len    = initializer->string.size;
3636         assert(type->kind == TYPE_ARRAY);
3637         assert(type->array.size_constant);
3638         size_t            len           = type->array.size;
3639         ir_initializer_t *irinitializer = create_initializer_compound(len);
3640
3641         const wchar_rep_t *string = initializer->string.begin;
3642         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3643
3644         for (size_t i = 0; i < len; ++i) {
3645                 wchar_rep_t c = 0;
3646                 if (i < string_len) {
3647                         c = string[i];
3648                 }
3649                 tarval *tv = new_tarval_from_long(c, mode);
3650                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3651
3652                 set_initializer_compound_value(irinitializer, i, char_initializer);
3653         }
3654
3655         return irinitializer;
3656 }
3657
3658 static ir_initializer_t *create_ir_initializer(
3659                 const initializer_t *initializer, type_t *type)
3660 {
3661         switch(initializer->kind) {
3662                 case INITIALIZER_STRING:
3663                         return create_ir_initializer_string(&initializer->string, type);
3664
3665                 case INITIALIZER_WIDE_STRING:
3666                         return create_ir_initializer_wide_string(&initializer->wide_string,
3667                                                                  type);
3668
3669                 case INITIALIZER_LIST:
3670                         return create_ir_initializer_list(&initializer->list, type);
3671
3672                 case INITIALIZER_VALUE:
3673                         return create_ir_initializer_value(&initializer->value);
3674
3675                 case INITIALIZER_DESIGNATOR:
3676                         panic("unexpected designator initializer found");
3677         }
3678         panic("unknown initializer");
3679 }
3680
3681 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3682                 ir_node *base_addr)
3683 {
3684         if (is_atomic_type(type)) {
3685                 ir_mode *mode = get_type_mode(type);
3686                 tarval  *zero = get_mode_null(mode);
3687                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3688
3689                 /* TODO: bitfields */
3690                 ir_node *mem    = get_store();
3691                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3692                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3693                 set_store(proj_m);
3694         } else {
3695                 assert(is_compound_type(type));
3696
3697                 int n_members;
3698                 if (is_Array_type(type)) {
3699                         assert(has_array_upper_bound(type, 0));
3700                         n_members = get_array_upper_bound_int(type, 0);
3701                 } else {
3702                         n_members = get_compound_n_members(type);
3703                 }
3704
3705                 for (int i = 0; i < n_members; ++i) {
3706                         ir_node *addr;
3707                         ir_type *irtype;
3708                         if (is_Array_type(type)) {
3709                                 ir_entity *entity   = get_array_element_entity(type);
3710                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3711                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3712                                 ir_node   *in[1]    = { cnst };
3713                                 irtype = get_array_element_type(type);
3714                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3715                         } else {
3716                                 ir_entity *member = get_compound_member(type, i);
3717
3718                                 irtype = get_entity_type(member);
3719                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3720                         }
3721
3722                         create_dynamic_null_initializer(irtype, dbgi, addr);
3723                 }
3724         }
3725 }
3726
3727 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3728                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3729 {
3730         switch(get_initializer_kind(initializer)) {
3731         case IR_INITIALIZER_NULL: {
3732                 create_dynamic_null_initializer(type, dbgi, base_addr);
3733                 return;
3734         }
3735         case IR_INITIALIZER_CONST: {
3736                 ir_node *node     = get_initializer_const_value(initializer);
3737                 ir_mode *mode     = get_irn_mode(node);
3738                 ir_type *ent_type = get_entity_type(entity);
3739
3740                 /* is it a bitfield type? */
3741                 if (is_Primitive_type(ent_type) &&
3742                                 get_primitive_base_type(ent_type) != NULL) {
3743                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3744                         return;
3745                 }
3746
3747                 assert(get_type_mode(type) == mode);
3748                 ir_node *mem    = get_store();
3749                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3750                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3751                 set_store(proj_m);
3752                 return;
3753         }
3754         case IR_INITIALIZER_TARVAL: {
3755                 tarval  *tv       = get_initializer_tarval_value(initializer);
3756                 ir_mode *mode     = get_tarval_mode(tv);
3757                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3758                 ir_type *ent_type = get_entity_type(entity);
3759
3760                 /* is it a bitfield type? */
3761                 if (is_Primitive_type(ent_type) &&
3762                                 get_primitive_base_type(ent_type) != NULL) {
3763                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3764                         return;
3765                 }
3766
3767                 assert(get_type_mode(type) == mode);
3768                 ir_node *mem    = get_store();
3769                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3770                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3771                 set_store(proj_m);
3772                 return;
3773         }
3774         case IR_INITIALIZER_COMPOUND: {
3775                 assert(is_compound_type(type));
3776                 int n_members;
3777                 if (is_Array_type(type)) {
3778                         assert(has_array_upper_bound(type, 0));
3779                         n_members = get_array_upper_bound_int(type, 0);
3780                 } else {
3781                         n_members = get_compound_n_members(type);
3782                 }
3783
3784                 if (get_initializer_compound_n_entries(initializer)
3785                                 != (unsigned) n_members)
3786                         panic("initializer doesn't match compound type");
3787
3788                 for (int i = 0; i < n_members; ++i) {
3789                         ir_node   *addr;
3790                         ir_type   *irtype;
3791                         ir_entity *sub_entity;
3792                         if (is_Array_type(type)) {
3793                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3794                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3795                                 ir_node   *in[1]    = { cnst };
3796                                 irtype     = get_array_element_type(type);
3797                                 sub_entity = get_array_element_entity(type);
3798                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3799                                                        sub_entity);
3800                         } else {
3801                                 sub_entity = get_compound_member(type, i);
3802                                 irtype     = get_entity_type(sub_entity);
3803                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3804                                                              sub_entity);
3805                         }
3806
3807                         ir_initializer_t *sub_init
3808                                 = get_initializer_compound_value(initializer, i);
3809
3810                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3811                                                        addr);
3812                 }
3813                 return;
3814         }
3815         }
3816
3817         panic("invalid IR_INITIALIZER found");
3818 }
3819
3820 static void create_dynamic_initializer(ir_initializer_t *initializer,
3821                 dbg_info *dbgi, ir_entity *entity)
3822 {
3823         ir_node *frame     = get_local_frame(entity);
3824         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3825         ir_type *type      = get_entity_type(entity);
3826
3827         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3828 }
3829
3830 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3831                                      ir_entity *entity, type_t *type)
3832 {
3833         ir_node *memory = get_store();
3834         ir_node *nomem  = new_NoMem();
3835         ir_node *frame  = get_irg_frame(current_ir_graph);
3836         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3837
3838         if (initializer->kind == INITIALIZER_VALUE) {
3839                 initializer_value_t *initializer_value = &initializer->value;
3840
3841                 ir_node *value = expression_to_firm(initializer_value->value);
3842                 type = skip_typeref(type);
3843                 assign_value(dbgi, addr, type, value);
3844                 return;
3845         }
3846
3847         if (!is_constant_initializer(initializer)) {
3848                 ir_initializer_t *irinitializer
3849                         = create_ir_initializer(initializer, type);
3850
3851                 create_dynamic_initializer(irinitializer, dbgi, entity);
3852                 return;
3853         }
3854
3855         /* create the ir_initializer */
3856         ir_graph *const old_current_ir_graph = current_ir_graph;
3857         current_ir_graph = get_const_code_irg();
3858
3859         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3860
3861         assert(current_ir_graph == get_const_code_irg());
3862         current_ir_graph = old_current_ir_graph;
3863
3864         /* create a "template" entity which is copied to the entity on the stack */
3865         ident     *const id          = id_unique("initializer.%u");
3866         ir_type   *const irtype      = get_ir_type(type);
3867         ir_type   *const global_type = get_glob_type();
3868         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3869         set_entity_ld_ident(init_entity, id);
3870
3871         set_entity_variability(init_entity, variability_initialized);
3872         set_entity_visibility(init_entity, visibility_local);
3873         set_entity_allocation(init_entity, allocation_static);
3874
3875         set_entity_initializer(init_entity, irinitializer);
3876
3877         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3878         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3879
3880         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3881         set_store(copyb_mem);
3882 }
3883
3884 static void create_initializer_local_variable_entity(entity_t *entity)
3885 {
3886         assert(entity->kind == ENTITY_VARIABLE);
3887         initializer_t *initializer = entity->variable.initializer;
3888         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3889         ir_entity     *irentity    = entity->variable.v.entity;
3890         type_t        *type        = entity->declaration.type;
3891         create_local_initializer(initializer, dbgi, irentity, type);
3892 }
3893
3894 static void create_variable_initializer(entity_t *entity)
3895 {
3896         assert(entity->kind == ENTITY_VARIABLE);
3897         initializer_t *initializer = entity->variable.initializer;
3898         if (initializer == NULL)
3899                 return;
3900
3901         declaration_kind_t declaration_kind
3902                 = (declaration_kind_t) entity->declaration.kind;
3903         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3904                 create_initializer_local_variable_entity(entity);
3905                 return;
3906         }
3907
3908         type_t            *type = entity->declaration.type;
3909         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3910
3911         if (initializer->kind == INITIALIZER_VALUE) {
3912                 initializer_value_t *initializer_value = &initializer->value;
3913                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3914
3915                 ir_node *value = expression_to_firm(initializer_value->value);
3916                 value = do_strict_conv(dbgi, value);
3917
3918                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3919                         set_value(entity->variable.v.value_number, value);
3920                 } else {
3921                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3922
3923                         ir_entity *irentity = entity->variable.v.entity;
3924
3925                         if (tq & TYPE_QUALIFIER_CONST) {
3926                                 set_entity_variability(irentity, variability_constant);
3927                         } else {
3928                                 set_entity_variability(irentity, variability_initialized);
3929                         }
3930                         set_atomic_ent_value(irentity, value);
3931                 }
3932         } else {
3933                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3934                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3935
3936                 ir_entity        *irentity        = entity->variable.v.entity;
3937                 ir_initializer_t *irinitializer
3938                         = create_ir_initializer(initializer, type);
3939
3940                 if (tq & TYPE_QUALIFIER_CONST) {
3941                         set_entity_variability(irentity, variability_constant);
3942                 } else {
3943                         set_entity_variability(irentity, variability_initialized);
3944                 }
3945                 set_entity_initializer(irentity, irinitializer);
3946         }
3947 }
3948
3949 static void create_variable_length_array(entity_t *entity)
3950 {
3951         assert(entity->kind == ENTITY_VARIABLE);
3952         assert(entity->variable.initializer == NULL);
3953
3954         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3955         entity->variable.v.vla_base = NULL;
3956
3957         /* TODO: record VLA somewhere so we create the free node when we leave
3958          * it's scope */
3959 }
3960
3961 static void allocate_variable_length_array(entity_t *entity)
3962 {
3963         assert(entity->kind == ENTITY_VARIABLE);
3964         assert(entity->variable.initializer == NULL);
3965         assert(get_cur_block() != NULL);
3966
3967         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3968         type_t   *type      = entity->declaration.type;
3969         ir_type  *el_type   = get_ir_type(type->array.element_type);
3970
3971         /* make sure size_node is calculated */
3972         get_type_size(type);
3973         ir_node  *elems = type->array.size_node;
3974         ir_node  *mem   = get_store();
3975         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3976
3977         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3978         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3979         set_store(proj_m);
3980
3981         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3982         entity->variable.v.vla_base = addr;
3983 }
3984
3985 /**
3986  * Creates a Firm local variable from a declaration.
3987  */
3988 static void create_local_variable(entity_t *entity)
3989 {
3990         assert(entity->kind == ENTITY_VARIABLE);
3991         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3992
3993         bool needs_entity = entity->variable.address_taken;
3994         type_t *type = skip_typeref(entity->declaration.type);
3995
3996         /* is it a variable length array? */
3997         if (is_type_array(type) && !type->array.size_constant) {
3998                 create_variable_length_array(entity);
3999                 return;
4000         } else if (is_type_array(type) || is_type_compound(type)) {
4001                 needs_entity = true;
4002         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4003                 needs_entity = true;
4004         }
4005
4006         if (needs_entity) {
4007                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4008                 create_variable_entity(entity,
4009                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4010                                        frame_type);
4011         } else {
4012                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4013                 entity->variable.v.value_number = next_value_number_function;
4014                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4015                                         (variable_t*) &entity->variable);
4016                 ++next_value_number_function;
4017         }
4018 }
4019
4020 static void create_local_static_variable(entity_t *entity)
4021 {
4022         assert(entity->kind == ENTITY_VARIABLE);
4023         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4024
4025         type_t    *const type        = skip_typeref(entity->declaration.type);
4026         ir_type   *const global_type = get_glob_type();
4027         ir_type   *const irtype      = get_ir_type(type);
4028         dbg_info  *const dbgi        = get_dbg_info(&entity->base.source_position);
4029
4030         size_t l = strlen(entity->base.symbol->string);
4031         char   buf[l + sizeof(".%u")];
4032         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4033         ident     *const id = id_unique(buf);
4034
4035         ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4036
4037         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4038                 set_entity_volatility(irentity, volatility_is_volatile);
4039         }
4040
4041         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4042         entity->variable.v.entity = irentity;
4043         set_entity_ld_ident(irentity, id);
4044         set_entity_variability(irentity, variability_uninitialized);
4045         set_entity_visibility(irentity, visibility_local);
4046         set_entity_allocation(irentity, allocation_static);
4047
4048         ir_graph *const old_current_ir_graph = current_ir_graph;
4049         current_ir_graph = get_const_code_irg();
4050
4051         create_variable_initializer(entity);
4052
4053         assert(current_ir_graph == get_const_code_irg());
4054         current_ir_graph = old_current_ir_graph;
4055 }
4056
4057
4058
4059 static void return_statement_to_firm(return_statement_t *statement)
4060 {
4061         if (get_cur_block() == NULL)
4062                 return;
4063
4064         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4065         type_t   *type        = current_function_entity->declaration.type;
4066         ir_type  *func_irtype = get_ir_type(type);
4067
4068
4069         ir_node *in[1];
4070         int      in_len;
4071         if (get_method_n_ress(func_irtype) > 0) {
4072                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4073
4074                 if (statement->value != NULL) {
4075                         ir_node *node = expression_to_firm(statement->value);
4076                         node  = do_strict_conv(dbgi, node);
4077                         in[0] = node;
4078                 } else {
4079                         ir_mode *mode;
4080                         if (is_compound_type(res_type)) {
4081                                 mode = mode_P_data;
4082                         } else {
4083                                 mode = get_type_mode(res_type);
4084                         }
4085                         in[0] = new_Unknown(mode);
4086                 }
4087                 in_len = 1;
4088         } else {
4089                 /* build return_value for its side effects */
4090                 if (statement->value != NULL) {
4091                         expression_to_firm(statement->value);
4092                 }
4093                 in_len = 0;
4094         }
4095
4096         ir_node  *store = get_store();
4097         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4098
4099         ir_node *end_block = get_irg_end_block(current_ir_graph);
4100         add_immBlock_pred(end_block, ret);
4101
4102         set_cur_block(NULL);
4103 }
4104
4105 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4106 {
4107         if (get_cur_block() == NULL)
4108                 return NULL;
4109
4110         return expression_to_firm(statement->expression);
4111 }
4112
4113 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4114 {
4115         entity_t *entity = compound->scope.entities;
4116         for ( ; entity != NULL; entity = entity->base.next) {
4117                 if (!is_declaration(entity))
4118                         continue;
4119
4120                 create_local_declaration(entity);
4121         }
4122
4123         ir_node     *result    = NULL;
4124         statement_t *statement = compound->statements;
4125         for ( ; statement != NULL; statement = statement->base.next) {
4126                 if (statement->base.next == NULL
4127                                 && statement->kind == STATEMENT_EXPRESSION) {
4128                         result = expression_statement_to_firm(
4129                                         &statement->expression);
4130                         break;
4131                 }
4132                 statement_to_firm(statement);
4133         }
4134
4135         return result;
4136 }
4137
4138 static void create_global_variable(entity_t *entity)
4139 {
4140         assert(entity->kind == ENTITY_VARIABLE);
4141
4142         ir_visibility  vis;
4143         ir_type       *var_type;
4144         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4145                 case STORAGE_CLASS_STATIC:
4146                         vis = visibility_local;
4147                         goto global_var;
4148
4149                 case STORAGE_CLASS_EXTERN:
4150                         vis = visibility_external_allocated;
4151                         goto global_var;
4152
4153                 case STORAGE_CLASS_NONE:
4154                         vis = visibility_external_visible;
4155                         goto global_var;
4156
4157                 case STORAGE_CLASS_THREAD:
4158                         vis = visibility_external_visible;
4159                         goto tls_var;
4160
4161                 case STORAGE_CLASS_THREAD_EXTERN:
4162                         vis = visibility_external_allocated;
4163                         goto tls_var;
4164
4165                 case STORAGE_CLASS_THREAD_STATIC:
4166                         vis = visibility_local;
4167                         goto tls_var;
4168
4169 tls_var:
4170                         var_type = get_tls_type();
4171                         goto create_var;
4172
4173 global_var:
4174                         var_type = get_glob_type();
4175                         goto create_var;
4176
4177 create_var:
4178                         create_variable_entity(entity,
4179                                                DECLARATION_KIND_GLOBAL_VARIABLE,
4180                                                var_type);
4181                         /* Matze: I'm confused, shouldn't we only be here when creating
4182                          * variables? */
4183 #if 0
4184                         if (!is_type_function(skip_typeref(entity->declaration.type))) {
4185                                 set_entity_visibility(declaration->v.entity, vis);
4186                         }
4187 #else
4188                         set_entity_visibility(entity->variable.v.entity, vis);
4189 #endif
4190
4191                         return;
4192
4193                 case STORAGE_CLASS_TYPEDEF:
4194                 case STORAGE_CLASS_AUTO:
4195                 case STORAGE_CLASS_REGISTER:
4196                         break;
4197         }
4198         panic("Invalid storage class for global variable");
4199 }
4200
4201 static void create_local_declaration(entity_t *entity)
4202 {
4203         assert(is_declaration(entity));
4204
4205         /* construct type */
4206         (void) get_ir_type(entity->declaration.type);
4207         if (entity->base.symbol == NULL) {
4208                 return;
4209         }
4210
4211         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4212         case STORAGE_CLASS_STATIC:
4213                 create_local_static_variable(entity);
4214                 return;
4215         case STORAGE_CLASS_EXTERN:
4216                 if (entity->kind == ENTITY_FUNCTION) {
4217                         assert(entity->function.statement == NULL);
4218                         get_function_entity(entity);
4219                 } else {
4220                         create_global_variable(entity);
4221                         create_variable_initializer(entity);
4222                 }
4223                 return;
4224         case STORAGE_CLASS_NONE:
4225         case STORAGE_CLASS_AUTO:
4226         case STORAGE_CLASS_REGISTER:
4227                 if (entity->kind == ENTITY_FUNCTION) {
4228                         if (entity->function.statement != NULL) {
4229                                 get_function_entity(entity);
4230                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4231                                 enqueue_inner_function(entity);
4232                         } else {
4233                                 get_function_entity(entity);
4234                         }
4235                 } else {
4236                         create_local_variable(entity);
4237                 }
4238                 return;
4239         case STORAGE_CLASS_TYPEDEF:
4240         case STORAGE_CLASS_THREAD:
4241         case STORAGE_CLASS_THREAD_EXTERN:
4242         case STORAGE_CLASS_THREAD_STATIC:
4243                 break;
4244         }
4245         panic("invalid storage class found");
4246 }
4247
4248 static void initialize_local_declaration(entity_t *entity)
4249 {
4250         if (entity->base.symbol == NULL)
4251                 return;
4252
4253         switch ((declaration_kind_t) entity->declaration.kind) {
4254         case DECLARATION_KIND_LOCAL_VARIABLE:
4255         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4256                 create_variable_initializer(entity);
4257                 return;
4258
4259         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4260                 allocate_variable_length_array(entity);
4261                 return;
4262
4263         case DECLARATION_KIND_COMPOUND_MEMBER:
4264         case DECLARATION_KIND_GLOBAL_VARIABLE:
4265         case DECLARATION_KIND_FUNCTION:
4266         case DECLARATION_KIND_INNER_FUNCTION:
4267                 return;
4268
4269         case DECLARATION_KIND_UNKNOWN:
4270                 panic("can't initialize unknown declaration");
4271         }
4272         panic("invalid declaration kind");
4273 }
4274
4275 static void declaration_statement_to_firm(declaration_statement_t *statement)
4276 {
4277         entity_t *entity = statement->declarations_begin;
4278         entity_t *end    = statement->declarations_end->base.next;
4279         for ( ; entity != end; entity = entity->base.next) {
4280                 if (!is_declaration(entity))
4281                         continue;
4282                 initialize_local_declaration(entity);
4283         }
4284 }
4285
4286 static void if_statement_to_firm(if_statement_t *statement)
4287 {
4288         ir_node *cur_block = get_cur_block();
4289
4290         ir_node *fallthrough_block = NULL;
4291
4292         /* the true (blocks) */
4293         ir_node *true_block = NULL;
4294         if (statement->true_statement != NULL) {
4295                 true_block = new_immBlock();
4296                 statement_to_firm(statement->true_statement);
4297                 if (get_cur_block() != NULL) {
4298                         ir_node *jmp = new_Jmp();
4299                         if (fallthrough_block == NULL)
4300                                 fallthrough_block = new_immBlock();
4301                         add_immBlock_pred(fallthrough_block, jmp);
4302                 }
4303         }
4304
4305         /* the false (blocks) */
4306         ir_node *false_block = NULL;
4307         if (statement->false_statement != NULL) {
4308                 false_block = new_immBlock();
4309
4310                 statement_to_firm(statement->false_statement);
4311                 if (get_cur_block() != NULL) {
4312                         ir_node *jmp = new_Jmp();
4313                         if (fallthrough_block == NULL)
4314                                 fallthrough_block = new_immBlock();
4315                         add_immBlock_pred(fallthrough_block, jmp);
4316                 }
4317         }
4318
4319         /* create the condition */
4320         if (cur_block != NULL) {
4321                 if (true_block == NULL || false_block == NULL) {
4322                         if (fallthrough_block == NULL)
4323                                 fallthrough_block = new_immBlock();
4324                         if (true_block == NULL)
4325                                 true_block = fallthrough_block;
4326                         if (false_block == NULL)
4327                                 false_block = fallthrough_block;
4328                 }
4329
4330                 set_cur_block(cur_block);
4331                 create_condition_evaluation(statement->condition, true_block,
4332                                             false_block);
4333         }
4334
4335         mature_immBlock(true_block);
4336         if (false_block != fallthrough_block && false_block != NULL) {
4337                 mature_immBlock(false_block);
4338         }
4339         if (fallthrough_block != NULL) {
4340                 mature_immBlock(fallthrough_block);
4341         }
4342
4343         set_cur_block(fallthrough_block);
4344 }
4345
4346 static void while_statement_to_firm(while_statement_t *statement)
4347 {
4348         ir_node *jmp = NULL;
4349         if (get_cur_block() != NULL) {
4350                 jmp = new_Jmp();
4351         }
4352
4353         /* create the header block */
4354         ir_node *header_block = new_immBlock();
4355         if (jmp != NULL) {
4356                 add_immBlock_pred(header_block, jmp);
4357         }
4358
4359         /* the loop body */
4360         ir_node *old_continue_label = continue_label;
4361         ir_node *old_break_label    = break_label;
4362         continue_label              = header_block;
4363         break_label                 = NULL;
4364
4365         ir_node *body_block = new_immBlock();
4366         statement_to_firm(statement->body);
4367         ir_node *false_block = break_label;
4368
4369         assert(continue_label == header_block);
4370         continue_label = old_continue_label;
4371         break_label    = old_break_label;
4372
4373         if (get_cur_block() != NULL) {
4374                 jmp = new_Jmp();
4375                 add_immBlock_pred(header_block, jmp);
4376         }
4377
4378         /* shortcut for while(true) */
4379         if (is_constant_expression(statement->condition)
4380                         && fold_constant(statement->condition) != 0) {
4381                 set_cur_block(header_block);
4382                 ir_node *header_jmp = new_Jmp();
4383                 add_immBlock_pred(body_block, header_jmp);
4384
4385                 keep_alive(body_block);
4386                 keep_all_memory(body_block);
4387                 set_cur_block(body_block);
4388         } else {
4389                 if (false_block == NULL) {
4390                         false_block = new_immBlock();
4391                 }
4392
4393                 /* create the condition */
4394                 set_cur_block(header_block);
4395
4396                 create_condition_evaluation(statement->condition, body_block,
4397                                             false_block);
4398         }
4399
4400         mature_immBlock(body_block);
4401         mature_immBlock(header_block);
4402         if (false_block != NULL) {
4403                 mature_immBlock(false_block);
4404         }
4405
4406         set_cur_block(false_block);
4407 }
4408
4409 static void do_while_statement_to_firm(do_while_statement_t *statement)
4410 {
4411         ir_node *jmp = NULL;
4412         if (get_cur_block() != NULL) {
4413                 jmp = new_Jmp();
4414         }
4415
4416         /* create the header block */
4417         ir_node *header_block = new_immBlock();
4418
4419         /* the loop body */
4420         ir_node *body_block = new_immBlock();
4421         if (jmp != NULL) {
4422                 add_immBlock_pred(body_block, jmp);
4423         }
4424
4425         ir_node *old_continue_label = continue_label;
4426         ir_node *old_break_label    = break_label;
4427         continue_label              = header_block;
4428         break_label                 = NULL;
4429
4430         statement_to_firm(statement->body);
4431         ir_node *false_block = break_label;
4432
4433         assert(continue_label == header_block);
4434         continue_label = old_continue_label;
4435         break_label    = old_break_label;
4436
4437         if (get_cur_block() != NULL) {
4438                 ir_node *body_jmp = new_Jmp();
4439                 add_immBlock_pred(header_block, body_jmp);
4440                 mature_immBlock(header_block);
4441         }
4442
4443         if (false_block == NULL) {
4444                 false_block = new_immBlock();
4445         }
4446
4447         /* create the condition */
4448         set_cur_block(header_block);
4449
4450         create_condition_evaluation(statement->condition, body_block, false_block);
4451         mature_immBlock(body_block);
4452         mature_immBlock(header_block);
4453         if (false_block != NULL) {
4454                 mature_immBlock(false_block);
4455         }
4456
4457         set_cur_block(false_block);
4458 }
4459
4460 static void for_statement_to_firm(for_statement_t *statement)
4461 {
4462         ir_node *jmp = NULL;
4463
4464         /* create declarations */
4465         entity_t *entity = statement->scope.entities;
4466         for ( ; entity != NULL; entity = entity->base.next) {
4467                 if (!is_declaration(entity))
4468                         continue;
4469
4470                 create_local_declaration(entity);
4471         }
4472
4473         if (get_cur_block() != NULL) {
4474                 entity = statement->scope.entities;
4475                 for ( ; entity != NULL; entity = entity->base.next) {
4476                         if (!is_declaration(entity))
4477                                 continue;
4478
4479                         initialize_local_declaration(entity);
4480                 }
4481
4482                 if (statement->initialisation != NULL) {
4483                         expression_to_firm(statement->initialisation);
4484                 }
4485
4486                 jmp = new_Jmp();
4487         }
4488
4489
4490         /* create the step block */
4491         ir_node *const step_block = new_immBlock();
4492         if (statement->step != NULL) {
4493                 expression_to_firm(statement->step);
4494         }
4495         ir_node *const step_jmp = new_Jmp();
4496
4497         /* create the header block */
4498         ir_node *const header_block = new_immBlock();
4499         if (jmp != NULL) {
4500                 add_immBlock_pred(header_block, jmp);
4501         }
4502         add_immBlock_pred(header_block, step_jmp);
4503
4504         /* the false block */
4505         ir_node *const false_block = new_immBlock();
4506
4507         /* the loop body */
4508         ir_node * body_block;
4509         if (statement->body != NULL) {
4510                 ir_node *const old_continue_label = continue_label;
4511                 ir_node *const old_break_label    = break_label;
4512                 continue_label = step_block;
4513                 break_label    = false_block;
4514
4515                 body_block = new_immBlock();
4516                 statement_to_firm(statement->body);
4517
4518                 assert(continue_label == step_block);
4519                 assert(break_label    == false_block);
4520                 continue_label = old_continue_label;
4521                 break_label    = old_break_label;
4522
4523                 if (get_cur_block() != NULL) {
4524                         jmp = new_Jmp();
4525                         add_immBlock_pred(step_block, jmp);
4526                 }
4527         } else {
4528                 body_block = step_block;
4529         }
4530
4531         /* create the condition */
4532         set_cur_block(header_block);
4533         if (statement->condition != NULL) {
4534                 create_condition_evaluation(statement->condition, body_block,
4535                                             false_block);
4536         } else {
4537                 keep_alive(header_block);
4538                 keep_all_memory(header_block);
4539                 jmp = new_Jmp();
4540                 add_immBlock_pred(body_block, jmp);
4541         }
4542
4543         mature_immBlock(body_block);
4544         mature_immBlock(false_block);
4545         mature_immBlock(step_block);
4546         mature_immBlock(header_block);
4547         mature_immBlock(false_block);
4548
4549         set_cur_block(false_block);
4550 }
4551
4552 static void create_jump_statement(const statement_t *statement,
4553                                   ir_node *target_block)
4554 {
4555         if (get_cur_block() == NULL)
4556                 return;
4557
4558         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4559         ir_node  *jump = new_d_Jmp(dbgi);
4560         add_immBlock_pred(target_block, jump);
4561
4562         set_cur_block(NULL);
4563 }
4564
4565 static ir_node *get_break_label(void)
4566 {
4567         if (break_label == NULL) {
4568                 ir_node *cur_block = get_cur_block();
4569                 break_label = new_immBlock();
4570                 set_cur_block(cur_block);
4571         }
4572         return break_label;
4573 }
4574
4575 static void switch_statement_to_firm(switch_statement_t *statement)
4576 {
4577         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4578
4579         ir_node *expression  = expression_to_firm(statement->expression);
4580         ir_node *cond        = new_d_Cond(dbgi, expression);
4581
4582         set_cur_block(NULL);
4583
4584         ir_node *const old_switch_cond       = current_switch_cond;
4585         ir_node *const old_break_label       = break_label;
4586         const bool     old_saw_default_label = saw_default_label;
4587         saw_default_label                    = false;
4588         current_switch_cond                  = cond;
4589         break_label                          = NULL;
4590         switch_statement_t *const old_switch = current_switch;
4591         current_switch                       = statement;
4592
4593         /* determine a free number for the default label */
4594         unsigned long num_cases = 0;
4595         long def_nr = 0;
4596         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4597                 if (l->expression == NULL) {
4598                         /* default case */
4599                         continue;
4600                 }
4601                 if (l->last_case >= l->first_case)
4602                         num_cases += l->last_case - l->first_case + 1;
4603                 if (l->last_case > def_nr)
4604                         def_nr = l->last_case;
4605         }
4606
4607         if (def_nr == INT_MAX) {
4608                 /* Bad: an overflow will occurr, we cannot be sure that the
4609                  * maximum + 1 is a free number. Scan the values a second
4610                  * time to find a free number.
4611                  */
4612                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4613
4614                 memset(bits, 0, (num_cases + 7) >> 3);
4615                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4616                         if (l->expression == NULL) {
4617                                 /* default case */
4618                                 continue;
4619                         }
4620                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4621                         if (start < num_cases && l->last_case >= 0) {
4622                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4623                                         (unsigned long)l->last_case : num_cases - 1;
4624                                 for (unsigned long cns = start; cns <= end; ++cns) {
4625                                         bits[cns >> 3] |= (1 << (cns & 7));
4626                                 }
4627                         }
4628                 }
4629                 /* We look at the first num_cases constants:
4630                  * Either they are densed, so we took the last (num_cases)
4631                  * one, or they are non densed, so we will find one free
4632                  * there...
4633                  */
4634                 unsigned long i;
4635                 for (i = 0; i < num_cases; ++i)
4636                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4637                                 break;
4638
4639                 free(bits);
4640                 def_nr = i;
4641         } else {
4642                 ++def_nr;
4643         }
4644         statement->default_proj_nr = def_nr;
4645
4646         if (statement->body != NULL) {
4647                 statement_to_firm(statement->body);
4648         }
4649
4650         if (get_cur_block() != NULL) {
4651                 ir_node *jmp = new_Jmp();
4652                 add_immBlock_pred(get_break_label(), jmp);
4653         }
4654
4655         if (!saw_default_label) {
4656                 set_cur_block(get_nodes_block(cond));
4657                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4658                                                         statement->default_proj_nr);
4659                 add_immBlock_pred(get_break_label(), proj);
4660         }
4661
4662         if (break_label != NULL) {
4663                 mature_immBlock(break_label);
4664         }
4665         set_cur_block(break_label);
4666
4667         assert(current_switch_cond == cond);
4668         current_switch      = old_switch;
4669         current_switch_cond = old_switch_cond;
4670         break_label         = old_break_label;
4671         saw_default_label   = old_saw_default_label;
4672 }
4673
4674 static void case_label_to_firm(const case_label_statement_t *statement)
4675 {
4676         if (statement->is_empty_range)
4677                 return;
4678
4679         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4680
4681         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4682
4683         ir_node *proj;
4684         ir_node *old_block = get_nodes_block(current_switch_cond);
4685         ir_node *block     = new_immBlock();
4686
4687         set_cur_block(old_block);
4688         if (statement->expression != NULL) {
4689                 long pn     = statement->first_case;
4690                 long end_pn = statement->last_case;
4691                 assert(pn <= end_pn);
4692                 /* create jumps for all cases in the given range */
4693                 do {
4694                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4695                         add_immBlock_pred(block, proj);
4696                 } while(pn++ < end_pn);
4697         } else {
4698                 saw_default_label = true;
4699                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4700                                          current_switch->default_proj_nr);
4701
4702                 add_immBlock_pred(block, proj);
4703         }
4704
4705         if (fallthrough != NULL) {
4706                 add_immBlock_pred(block, fallthrough);
4707         }
4708         mature_immBlock(block);
4709         set_cur_block(block);
4710
4711         if (statement->statement != NULL) {
4712                 statement_to_firm(statement->statement);
4713         }
4714 }
4715
4716 static void label_to_firm(const label_statement_t *statement)
4717 {
4718         ir_node *block = get_label_block(statement->label);
4719
4720         if (get_cur_block() != NULL) {
4721                 ir_node *jmp = new_Jmp();
4722                 add_immBlock_pred(block, jmp);
4723         }
4724
4725         set_cur_block(block);
4726         keep_alive(block);
4727         keep_all_memory(block);
4728
4729         if (statement->statement != NULL) {
4730                 statement_to_firm(statement->statement);
4731         }
4732 }
4733
4734 static void goto_to_firm(const goto_statement_t *statement)
4735 {
4736         if (get_cur_block() == NULL)
4737                 return;
4738
4739         if (statement->expression) {
4740                 ir_node  *irn  = expression_to_firm(statement->expression);
4741                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4742                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4743
4744                 set_irn_link(ijmp, ijmp_list);
4745                 ijmp_list = ijmp;
4746         } else {
4747                 ir_node *block = get_label_block(statement->label);
4748                 ir_node *jmp   = new_Jmp();
4749                 add_immBlock_pred(block, jmp);
4750         }
4751         set_cur_block(NULL);
4752 }
4753
4754 static void asm_statement_to_firm(const asm_statement_t *statement)
4755 {
4756         bool needs_memory = false;
4757
4758         if (statement->is_volatile) {
4759                 needs_memory = true;
4760         }
4761
4762         size_t         n_clobbers = 0;
4763         asm_clobber_t *clobber    = statement->clobbers;
4764         for ( ; clobber != NULL; clobber = clobber->next) {
4765                 const char *clobber_str = clobber->clobber.begin;
4766
4767                 if (!be_is_valid_clobber(clobber_str)) {
4768                         errorf(&statement->base.source_position,
4769                                    "invalid clobber '%s' specified", clobber->clobber);
4770                         continue;
4771                 }
4772
4773                 if (strcmp(clobber_str, "memory") == 0) {
4774                         needs_memory = true;
4775                         continue;
4776                 }
4777
4778                 ident *id = new_id_from_str(clobber_str);
4779                 obstack_ptr_grow(&asm_obst, id);
4780                 ++n_clobbers;
4781         }
4782         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4783         ident **clobbers = NULL;
4784         if (n_clobbers > 0) {
4785                 clobbers = obstack_finish(&asm_obst);
4786         }
4787
4788         size_t n_inputs  = 0;
4789         asm_argument_t *argument = statement->inputs;
4790         for ( ; argument != NULL; argument = argument->next)
4791                 n_inputs++;
4792         size_t n_outputs = 0;
4793         argument = statement->outputs;
4794         for ( ; argument != NULL; argument = argument->next)
4795                 n_outputs++;
4796
4797         unsigned next_pos = 0;
4798
4799         ir_node *ins[n_inputs + n_outputs + 1];
4800         size_t   in_size = 0;
4801
4802         ir_asm_constraint tmp_in_constraints[n_outputs];
4803
4804         const expression_t *out_exprs[n_outputs];
4805         ir_node            *out_addrs[n_outputs];
4806         size_t              out_size = 0;
4807
4808         argument = statement->outputs;
4809         for ( ; argument != NULL; argument = argument->next) {
4810                 const char *constraints = argument->constraints.begin;
4811                 asm_constraint_flags_t asm_flags
4812                         = be_parse_asm_constraints(constraints);
4813
4814                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4815                         errorf(&statement->base.source_position,
4816                                "some constraints in '%s' are not supported", constraints);
4817                         continue;
4818                 }
4819                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4820                         errorf(&statement->base.source_position,
4821                                "some constraints in '%s' are invalid", constraints);
4822                         continue;
4823                 }
4824                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4825                         errorf(&statement->base.source_position,
4826                                "no write flag specified for output constraints '%s'",
4827                                constraints);
4828                         continue;
4829                 }
4830
4831                 unsigned pos = next_pos++;
4832                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4833                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4834                         expression_t *expr = argument->expression;
4835                         ir_node      *addr = expression_to_addr(expr);
4836                         /* in+output, construct an artifical same_as constraint on the
4837                          * input */
4838                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4839                                 char     buf[64];
4840                                 ir_node *value = get_value_from_lvalue(expr, addr);
4841
4842                                 snprintf(buf, sizeof(buf), "%u", pos);
4843
4844                                 ir_asm_constraint constraint;
4845                                 constraint.pos              = pos;
4846                                 constraint.constraint       = new_id_from_str(buf);
4847                                 constraint.mode             = get_ir_mode(expr->base.type);
4848                                 tmp_in_constraints[in_size] = constraint;
4849                                 ins[in_size] = value;
4850
4851                                 ++in_size;
4852                         }
4853
4854                         out_exprs[out_size] = expr;
4855                         out_addrs[out_size] = addr;
4856                         ++out_size;
4857                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4858                         /* pure memory ops need no input (but we have to make sure we
4859                          * attach to the memory) */
4860                         assert(! (asm_flags &
4861                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4862                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4863                         needs_memory = true;
4864
4865                         /* we need to attach the address to the inputs */
4866                         expression_t *expr = argument->expression;
4867
4868                         ir_asm_constraint constraint;
4869                         constraint.pos              = pos;
4870                         constraint.constraint       = new_id_from_str(constraints);
4871                         constraint.mode             = NULL;
4872                         tmp_in_constraints[in_size] = constraint;
4873
4874                         ins[in_size]          = expression_to_addr(expr);
4875                         ++in_size;
4876                         continue;
4877                 } else {
4878                         errorf(&statement->base.source_position,
4879                                "only modifiers but no place set in constraints '%s'",
4880                                constraints);
4881                         continue;
4882                 }
4883
4884                 ir_asm_constraint constraint;
4885                 constraint.pos        = pos;
4886                 constraint.constraint = new_id_from_str(constraints);
4887                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4888
4889                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4890         }
4891         assert(obstack_object_size(&asm_obst)
4892                         == out_size * sizeof(ir_asm_constraint));
4893         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4894
4895
4896         obstack_grow(&asm_obst, tmp_in_constraints,
4897                      in_size * sizeof(tmp_in_constraints[0]));
4898         /* find and count input and output arguments */
4899         argument = statement->inputs;
4900         for ( ; argument != NULL; argument = argument->next) {
4901                 const char *constraints = argument->constraints.begin;
4902                 asm_constraint_flags_t asm_flags
4903                         = be_parse_asm_constraints(constraints);
4904
4905                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4906                         errorf(&statement->base.source_position,
4907                                "some constraints in '%s' are not supported", constraints);
4908                         continue;
4909                 }
4910                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4911                         errorf(&statement->base.source_position,
4912                                "some constraints in '%s' are invalid", constraints);
4913                         continue;
4914                 }
4915                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4916                         errorf(&statement->base.source_position,
4917                                "write flag specified for input constraints '%s'",
4918                                constraints);
4919                         continue;
4920                 }
4921
4922                 ir_node *input;
4923                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4924                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4925                         /* we can treat this as "normal" input */
4926                         input = expression_to_firm(argument->expression);
4927                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4928                         /* pure memory ops need no input (but we have to make sure we
4929                          * attach to the memory) */
4930                         assert(! (asm_flags &
4931                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4932                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4933                         needs_memory = true;
4934                         input = expression_to_addr(argument->expression);
4935                 } else {
4936                         errorf(&statement->base.source_position,
4937                                "only modifiers but no place set in constraints '%s'",
4938                                constraints);
4939                         continue;
4940                 }
4941
4942                 ir_asm_constraint constraint;
4943                 constraint.pos        = next_pos++;
4944                 constraint.constraint = new_id_from_str(constraints);
4945                 constraint.mode       = get_irn_mode(input);
4946
4947                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4948                 ins[in_size++] = input;
4949         }
4950
4951         if (needs_memory) {
4952                 ir_asm_constraint constraint;
4953                 constraint.pos        = next_pos++;
4954                 constraint.constraint = new_id_from_str("");
4955                 constraint.mode       = mode_M;
4956
4957                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4958                 ins[in_size++] = get_store();
4959         }
4960
4961         assert(obstack_object_size(&asm_obst)
4962                         == in_size * sizeof(ir_asm_constraint));
4963         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4964
4965         /* create asm node */
4966         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4967
4968         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4969
4970         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4971                                   out_size, output_constraints,
4972                                   n_clobbers, clobbers, asm_text);
4973
4974         if (statement->is_volatile) {
4975                 set_irn_pinned(node, op_pin_state_pinned);
4976         } else {
4977                 set_irn_pinned(node, op_pin_state_floats);
4978         }
4979
4980         /* create output projs & connect them */
4981         if (needs_memory) {
4982                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4983                 set_store(projm);
4984         }
4985
4986         size_t i;
4987         for (i = 0; i < out_size; ++i) {
4988                 const expression_t *out_expr = out_exprs[i];
4989                 long                pn       = i;
4990                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4991                 ir_node            *proj     = new_Proj(node, mode, pn);
4992                 ir_node            *addr     = out_addrs[i];
4993
4994                 set_value_for_expression_addr(out_expr, proj, addr);
4995         }
4996 }
4997
4998 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4999         statement_to_firm(statement->try_statement);
5000         warningf(&statement->base.source_position, "structured exception handling ignored");
5001 }
5002
5003 static void     leave_statement_to_firm(leave_statement_t *statement) {
5004         errorf(&statement->base.source_position, "__leave not supported yet");
5005 }
5006
5007 /**
5008  * Transform a statement.
5009  */
5010 static void statement_to_firm(statement_t *statement)
5011 {
5012 #ifndef NDEBUG
5013         assert(!statement->base.transformed);
5014         statement->base.transformed = true;
5015 #endif
5016
5017         switch (statement->kind) {
5018         case STATEMENT_INVALID:
5019                 panic("invalid statement found");
5020                 return;
5021         case STATEMENT_EMPTY:
5022                 /* nothing */
5023                 return;
5024         case STATEMENT_COMPOUND:
5025                 compound_statement_to_firm(&statement->compound);
5026                 return;
5027         case STATEMENT_RETURN:
5028                 return_statement_to_firm(&statement->returns);
5029                 return;
5030         case STATEMENT_EXPRESSION:
5031                 expression_statement_to_firm(&statement->expression);
5032                 return;
5033         case STATEMENT_IF:
5034                 if_statement_to_firm(&statement->ifs);
5035                 return;
5036         case STATEMENT_WHILE:
5037                 while_statement_to_firm(&statement->whiles);
5038                 return;
5039         case STATEMENT_DO_WHILE:
5040                 do_while_statement_to_firm(&statement->do_while);
5041                 return;
5042         case STATEMENT_DECLARATION:
5043                 declaration_statement_to_firm(&statement->declaration);
5044                 return;
5045         case STATEMENT_BREAK:
5046                 create_jump_statement(statement, get_break_label());
5047                 return;
5048         case STATEMENT_CONTINUE:
5049                 create_jump_statement(statement, continue_label);
5050                 return;
5051         case STATEMENT_SWITCH:
5052                 switch_statement_to_firm(&statement->switchs);
5053                 return;
5054         case STATEMENT_CASE_LABEL:
5055                 case_label_to_firm(&statement->case_label);
5056                 return;
5057         case STATEMENT_FOR:
5058                 for_statement_to_firm(&statement->fors);
5059                 return;
5060         case STATEMENT_LABEL:
5061                 label_to_firm(&statement->label);
5062                 return;
5063         case STATEMENT_LOCAL_LABEL:
5064                 /* local labels transform the semantics of labels while parsing
5065                  * they don't need any special treatment here */
5066                 return;
5067         case STATEMENT_GOTO:
5068                 goto_to_firm(&statement->gotos);
5069                 return;
5070         case STATEMENT_ASM:
5071                 asm_statement_to_firm(&statement->asms);
5072                 return;
5073         case STATEMENT_MS_TRY:
5074                 ms_try_statement_to_firm(&statement->ms_try);
5075                 return;
5076         case STATEMENT_LEAVE:
5077                 leave_statement_to_firm(&statement->leave);
5078                 return;
5079         }
5080         panic("Statement not implemented\n");
5081 }
5082
5083 static int count_local_variables(const entity_t *entity,
5084                                  const entity_t *const end)
5085 {
5086         int count = 0;
5087         for (; entity != end; entity = entity->base.next) {
5088                 if (entity->kind != ENTITY_VARIABLE)
5089                         continue;
5090                 type_t *type = skip_typeref(entity->declaration.type);
5091
5092                 if (!entity->variable.address_taken && is_type_scalar(type))
5093                         ++count;
5094         }
5095         return count;
5096 }
5097
5098 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5099 {
5100         int *const count = env;
5101
5102         switch (stmt->kind) {
5103         case STATEMENT_DECLARATION: {
5104                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5105                 *count += count_local_variables(decl_stmt->declarations_begin,
5106                                                                                 decl_stmt->declarations_end->base.next);
5107                 break;
5108         }
5109
5110         case STATEMENT_FOR:
5111                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5112                 break;
5113
5114         default:
5115                 break;
5116         }
5117 }
5118
5119 static int get_function_n_local_vars(entity_t *entity)
5120 {
5121         int count = 0;
5122
5123         /* count parameters */
5124         count += count_local_variables(entity->function.parameters.entities, NULL);
5125
5126         /* count local variables declared in body */
5127         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5128                         &count);
5129         return count;
5130 }
5131
5132 static void initialize_function_parameters(entity_t *entity)
5133 {
5134         assert(entity->kind == ENTITY_FUNCTION);
5135         ir_graph *irg             = current_ir_graph;
5136         ir_node  *args            = get_irg_args(irg);
5137         ir_node  *start_block     = get_irg_start_block(irg);
5138         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5139
5140         int       n         = 0;
5141         entity_t *parameter = entity->function.parameters.entities;
5142         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5143                 assert(parameter->kind == ENTITY_VARIABLE);
5144                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5145                 type_t *type = skip_typeref(parameter->declaration.type);
5146
5147                 bool needs_entity = parameter->variable.address_taken;
5148                 assert(!is_type_array(type));
5149                 if (is_type_compound(type)) {
5150                         needs_entity = true;
5151                 }
5152
5153                 if (needs_entity) {
5154                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5155                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5156                         set_entity_ident(entity, id);
5157
5158                         parameter->declaration.kind
5159                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5160                         parameter->variable.v.entity = entity;
5161                         continue;
5162                 }
5163
5164                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5165                 ir_mode *param_mode   = get_type_mode(param_irtype);
5166
5167                 long     pn    = n;
5168                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5169
5170                 ir_mode *mode = get_ir_mode(type);
5171                 value = create_conv(NULL, value, mode);
5172                 value = do_strict_conv(NULL, value);
5173
5174                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5175                 parameter->variable.v.value_number = next_value_number_function;
5176                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5177                                         (variable_t*) &parameter->variable);
5178                 ++next_value_number_function;
5179
5180                 set_value(parameter->variable.v.value_number, value);
5181         }
5182 }
5183
5184 /**
5185  * Handle additional decl modifiers for IR-graphs
5186  *
5187  * @param irg            the IR-graph
5188  * @param dec_modifiers  additional modifiers
5189  */
5190 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5191 {
5192         if (decl_modifiers & DM_NORETURN) {
5193                 /* TRUE if the declaration includes the Microsoft
5194                    __declspec(noreturn) specifier. */
5195                 set_irg_additional_property(irg, mtp_property_noreturn);
5196         }
5197         if (decl_modifiers & DM_NOTHROW) {
5198                 /* TRUE if the declaration includes the Microsoft
5199                    __declspec(nothrow) specifier. */
5200                 set_irg_additional_property(irg, mtp_property_nothrow);
5201         }
5202         if (decl_modifiers & DM_NAKED) {
5203                 /* TRUE if the declaration includes the Microsoft
5204                    __declspec(naked) specifier. */
5205                 set_irg_additional_property(irg, mtp_property_naked);
5206         }
5207         if (decl_modifiers & DM_FORCEINLINE) {
5208                 /* TRUE if the declaration includes the
5209                    Microsoft __forceinline specifier. */
5210                 set_irg_inline_property(irg, irg_inline_forced);
5211         }
5212         if (decl_modifiers & DM_NOINLINE) {
5213                 /* TRUE if the declaration includes the Microsoft
5214                    __declspec(noinline) specifier. */
5215                 set_irg_inline_property(irg, irg_inline_forbidden);
5216         }
5217 }
5218
5219 static void add_function_pointer(ir_type *segment, ir_entity *method,
5220                                  const char *unique_template)
5221 {
5222         ir_type   *method_type  = get_entity_type(method);
5223         ident     *id           = id_unique(unique_template);
5224         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5225
5226         ident     *ide          = id_unique(unique_template);
5227         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5228         ir_graph  *irg          = get_const_code_irg();
5229         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5230                                                            method, NULL);
5231
5232         set_entity_compiler_generated(ptr, 1);
5233         set_entity_variability(ptr, variability_constant);
5234         set_atomic_ent_value(ptr, val);
5235 }
5236
5237 /**
5238  * Generate possible IJmp branches to a given label block.
5239  */
5240 static void gen_ijmp_branches(ir_node *block) {
5241         ir_node *ijmp;
5242         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5243                 add_immBlock_pred(block, ijmp);
5244         }
5245 }
5246
5247 /**
5248  * Create code for a function.
5249  */
5250 static void create_function(entity_t *entity)
5251 {
5252         assert(entity->kind == ENTITY_FUNCTION);
5253         ir_entity *function_entity = get_function_entity(entity);
5254
5255         if (entity->function.statement == NULL)
5256                 return;
5257
5258         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5259                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5260                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5261         }
5262         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5263                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5264                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5265         }
5266
5267         current_function_entity = entity;
5268         current_function_name   = NULL;
5269         current_funcsig         = NULL;
5270
5271         assert(all_labels == NULL);
5272         all_labels = NEW_ARR_F(label_t *, 0);
5273         ijmp_list  = NULL;
5274
5275         int       n_local_vars = get_function_n_local_vars(entity);
5276         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5277
5278         ir_graph *old_current_function = current_function;
5279         current_function = irg;
5280
5281         set_irg_fp_model(irg, firm_opt.fp_model);
5282         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5283         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5284
5285         ir_node *first_block = get_cur_block();
5286
5287         /* set inline flags */
5288         if (entity->function.is_inline)
5289                 set_irg_inline_property(irg, irg_inline_recomended);
5290         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5291
5292         next_value_number_function = 0;
5293         initialize_function_parameters(entity);
5294
5295         statement_to_firm(entity->function.statement);
5296
5297         ir_node *end_block = get_irg_end_block(irg);
5298
5299         /* do we have a return statement yet? */
5300         if (get_cur_block() != NULL) {
5301                 type_t *type = skip_typeref(entity->declaration.type);
5302                 assert(is_type_function(type));
5303                 const function_type_t *func_type   = &type->function;
5304                 const type_t          *return_type
5305                         = skip_typeref(func_type->return_type);
5306
5307                 ir_node *ret;
5308                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5309                         ret = new_Return(get_store(), 0, NULL);
5310                 } else {
5311                         ir_mode *mode;
5312                         if (is_type_scalar(return_type)) {
5313                                 mode = get_ir_mode(func_type->return_type);
5314                         } else {
5315                                 mode = mode_P_data;
5316                         }
5317
5318                         ir_node *in[1];
5319                         /* §5.1.2.2.3 main implicitly returns 0 */
5320                         if (is_main(entity)) {
5321                                 in[0] = new_Const(mode, get_mode_null(mode));
5322                         } else {
5323                                 in[0] = new_Unknown(mode);
5324                         }
5325                         ret = new_Return(get_store(), 1, in);
5326                 }
5327                 add_immBlock_pred(end_block, ret);
5328         }
5329
5330         bool has_computed_gotos = false;
5331         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5332                 label_t *label = all_labels[i];
5333                 if (label->address_taken) {
5334                         gen_ijmp_branches(label->block);
5335                         has_computed_gotos = true;
5336                 }
5337                 mature_immBlock(label->block);
5338         }
5339         if (has_computed_gotos) {
5340                 /* if we have computed goto's in the function, we cannot inline it */
5341                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5342                         warningf(&entity->base.source_position,
5343                                  "function '%Y' can never be inlined because it contains a computed goto",
5344                                  entity->base.symbol);
5345                 }
5346                 set_irg_inline_property(irg, irg_inline_forbidden);
5347         }
5348
5349         DEL_ARR_F(all_labels);
5350         all_labels = NULL;
5351
5352         mature_immBlock(first_block);
5353         mature_immBlock(end_block);
5354
5355         irg_finalize_cons(irg);
5356
5357         /* finalize the frame type */
5358         ir_type *frame_type = get_irg_frame_type(irg);
5359         int      n          = get_compound_n_members(frame_type);
5360         int      align_all  = 4;
5361         int      offset     = 0;
5362         for (int i = 0; i < n; ++i) {
5363                 ir_entity *entity      = get_compound_member(frame_type, i);
5364                 ir_type   *entity_type = get_entity_type(entity);
5365
5366                 int align = get_type_alignment_bytes(entity_type);
5367                 if (align > align_all)
5368                         align_all = align;
5369                 int misalign = 0;
5370                 if (align > 0) {
5371                         misalign  = offset % align;
5372                         if (misalign > 0) {
5373                                 offset += align - misalign;
5374                         }
5375                 }
5376
5377                 set_entity_offset(entity, offset);
5378                 offset += get_type_size_bytes(entity_type);
5379         }
5380         set_type_size_bytes(frame_type, offset);
5381         set_type_alignment_bytes(frame_type, align_all);
5382
5383         irg_vrfy(irg);
5384         current_function = old_current_function;
5385
5386         /* create inner functions */
5387         entity_t *inner;
5388         for (inner = next_inner_function(); inner != NULL;
5389              inner = next_inner_function()) {
5390                 create_function(inner);
5391         }
5392 }
5393
5394 static void scope_to_firm(scope_t *scope)
5395 {
5396         /* first pass: create declarations */
5397         entity_t *entity = scope->entities;
5398         for ( ; entity != NULL; entity = entity->base.next) {
5399                 if (entity->base.symbol == NULL)
5400                         continue;
5401
5402                 if (entity->kind == ENTITY_FUNCTION) {
5403                         get_function_entity(entity);
5404                 } else if (entity->kind == ENTITY_VARIABLE) {
5405                         create_global_variable(entity);
5406                 }
5407         }
5408
5409         /* second pass: create code/initializers */
5410         entity = scope->entities;
5411         for ( ; entity != NULL; entity = entity->base.next) {
5412                 if (entity->base.symbol == NULL)
5413                         continue;
5414
5415                 if (entity->kind == ENTITY_FUNCTION) {
5416                         create_function(entity);
5417                 } else if (entity->kind == ENTITY_VARIABLE) {
5418                         assert(entity->declaration.kind
5419                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5420                         current_ir_graph = get_const_code_irg();
5421                         create_variable_initializer(entity);
5422                 }
5423         }
5424 }
5425
5426 void init_ast2firm(void)
5427 {
5428         obstack_init(&asm_obst);
5429         init_atomic_modes();
5430
5431         /* OS option must be set to the backend */
5432         switch (firm_opt.os_support) {
5433         case OS_SUPPORT_MINGW:
5434                 create_ld_ident = create_name_win32;
5435                 break;
5436         case OS_SUPPORT_LINUX:
5437                 create_ld_ident = create_name_linux_elf;
5438                 break;
5439         case OS_SUPPORT_MACHO:
5440                 create_ld_ident = create_name_macho;
5441                 break;
5442         default:
5443                 panic("unexpected OS support mode");
5444         }
5445
5446         /* create idents for all known runtime functions */
5447         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5448                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5449         }
5450
5451         sym_C = symbol_table_insert("C");
5452
5453         entitymap_init(&entitymap);
5454 }
5455
5456 static void init_ir_types(void)
5457 {
5458         static int ir_types_initialized = 0;
5459         if (ir_types_initialized)
5460                 return;
5461         ir_types_initialized = 1;
5462
5463         ir_type_int        = get_ir_type(type_int);
5464         ir_type_const_char = get_ir_type(type_const_char);
5465         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5466         ir_type_void       = get_ir_type(type_void);
5467 }
5468
5469 void exit_ast2firm(void)
5470 {
5471         entitymap_destroy(&entitymap);
5472         obstack_free(&asm_obst, NULL);
5473 }
5474
5475 static void global_asm_to_firm(statement_t *s)
5476 {
5477         for (; s != NULL; s = s->base.next) {
5478                 assert(s->kind == STATEMENT_ASM);
5479
5480                 char const *const text = s->asms.asm_text.begin;
5481                 size_t            size = s->asms.asm_text.size;
5482
5483                 /* skip the last \0 */
5484                 if (text[size - 1] == '\0')
5485                         --size;
5486
5487                 ident *const id = new_id_from_chars(text, size);
5488                 add_irp_asm(id);
5489         }
5490 }
5491
5492 void translation_unit_to_firm(translation_unit_t *unit)
5493 {
5494         /* just to be sure */
5495         continue_label           = NULL;
5496         break_label              = NULL;
5497         current_switch_cond      = NULL;
5498         current_translation_unit = unit;
5499
5500         init_ir_types();
5501         inner_functions = NEW_ARR_F(entity_t *, 0);
5502
5503         scope_to_firm(&unit->scope);
5504         global_asm_to_firm(unit->global_asm);
5505
5506         DEL_ARR_F(inner_functions);
5507         inner_functions  = NULL;
5508
5509         current_ir_graph         = NULL;
5510         current_translation_unit = NULL;
5511 }