nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 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 <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "symbol_t.h"
  39 #include "token_t.h"
  40 #include "type_t.h"
  41 #include "ast_t.h"
  42 #include "entity_t.h"
  43 #include "parser.h"
  44 #include "diagnostic.h"
  45 #include "lang_features.h"
  46 #include "types.h"
  47 #include "type_hash.h"
  48 #include "mangle.h"
  49 #include "walk.h"
  50 #include "warning.h"
  51 #include "printer.h"
  52 #include "entitymap_t.h"
  53 #include "driver/firm_opt.h"
  54
  55 typedef struct trampoline_region trampoline_region;
  56 struct trampoline_region {
  57         ir_entity        *function;    /**< The function that is called by this trampoline */
  58         ir_entity        *region;      /**< created region for the trampoline */
  59 };
  60
  61 fp_model_t firm_fp_model = fp_model_precise;
  62
  63 static const backend_params *be_params;
  64
  65 static ir_type *ir_type_char;
  66 static ir_type *ir_type_wchar_t;
  67
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int        next_value_number_function;
  75 static ir_node   *continue_label;
  76 static ir_node   *break_label;
  77 static ir_node   *current_switch;
  78 static bool       saw_default_label;
  79 static label_t  **all_labels;
  80 static entity_t **inner_functions;
  81 static ir_node   *ijmp_list;
  82 static bool       constant_folding;
  83
  84 static const entity_t     *current_function_entity;
  85 static ir_node            *current_function_name;
  86 static ir_node            *current_funcsig;
  87 static ir_graph           *current_function;
  88 static translation_unit_t *current_translation_unit;
  89 static trampoline_region  *current_trampolines;
  90 static ir_type            *current_outer_frame;
  91 static ir_node            *current_static_link;
  92 static ir_entity          *current_vararg_entity;
  93
  94 static entitymap_t  entitymap;
  95
  96 static struct obstack asm_obst;
  97
  98 typedef enum declaration_kind_t {
  99         DECLARATION_KIND_UNKNOWN,
 100         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 101         DECLARATION_KIND_GLOBAL_VARIABLE,
 102         DECLARATION_KIND_LOCAL_VARIABLE,
 103         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 104         DECLARATION_KIND_PARAMETER,
 105         DECLARATION_KIND_PARAMETER_ENTITY,
 106         DECLARATION_KIND_FUNCTION,
 107         DECLARATION_KIND_COMPOUND_MEMBER,
 108         DECLARATION_KIND_INNER_FUNCTION
 109 } declaration_kind_t;
 110
 111 static ir_type *get_ir_type_incomplete(type_t *type);
 112
 113 static void enqueue_inner_function(entity_t *entity)
 114 {
 115         if (inner_functions == NULL)
 116                 inner_functions = NEW_ARR_F(entity_t *, 0);
 117         ARR_APP1(entity_t*, inner_functions, entity);
 118 }
 119
 120 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 121 {
 122         const entity_t *entity = get_irg_loc_description(irg, pos);
 123
 124         if (entity != NULL) {
 125                 source_position_t const *const pos = &entity->base.source_position;
 126                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 127         }
 128         return new_r_Unknown(irg, mode);
 129 }
 130
 131 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 132 {
 133         source_position_t const *const pos = (source_position_t const*)dbg;
 134         if (pos) {
 135                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 136         } else {
 137                 return (src_loc_t){ NULL, 0, 0 };
 138         }
 139 }
 140
 141 static dbg_info *get_dbg_info(const source_position_t *pos)
 142 {
 143         return (dbg_info*) pos;
 144 }
 145
 146 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 147                                     const type_dbg_info *dbg)
 148 {
 149         assert(dbg != NULL);
 150         print_to_buffer(buffer, buffer_size);
 151         const type_t *type = (const type_t*) dbg;
 152         print_type(type);
 153         finish_print_to_buffer();
 154 }
 155
 156 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 157 {
 158         return (type_dbg_info*) type;
 159 }
 160
 161 /* is the current block a reachable one? */
 162 static bool currently_reachable(void)
 163 {
 164         ir_node *const block = get_cur_block();
 165         return block != NULL && !is_Bad(block);
 166 }
 167
 168 static void set_unreachable_now(void)
 169 {
 170         set_cur_block(NULL);
 171 }
 172
 173 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 174
 175 static ir_node *_expression_to_firm(const expression_t *expression);
 176 static ir_node *expression_to_firm(const expression_t *expression);
 177
 178 static unsigned decide_modulo_shift(unsigned type_size)
 179 {
 180         if (architecture_modulo_shift == 0)
 181                 return 0;
 182         if (type_size < architecture_modulo_shift)
 183                 return architecture_modulo_shift;
 184         return type_size;
 185 }
 186
 187 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 188 {
 189         unsigned flags = get_atomic_type_flags(kind);
 190         unsigned size  = get_atomic_type_size(kind);
 191         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 192             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 193                 switch (size) {
 194                 case 4:  return get_modeF();
 195                 case 8:  return get_modeD();
 196                 default: panic("unexpected kind");
 197                 }
 198         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 199                 char            name[64];
 200                 unsigned        bit_size     = size * 8;
 201                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 202                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 203
 204                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 205                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 206                                     modulo_shift);
 207         }
 208
 209         return NULL;
 210 }
 211
 212 /**
 213  * Initialises the atomic modes depending on the machine size.
 214  */
 215 static void init_atomic_modes(void)
 216 {
 217         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 218         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 219                 if (atomic_modes[i] != NULL)
 220                         continue;
 221                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 222         }
 223 }
 224
 225 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 226 {
 227         assert(kind <= ATOMIC_TYPE_LAST);
 228         return atomic_modes[kind];
 229 }
 230
 231 static ir_node *get_vla_size(array_type_t *const type)
 232 {
 233         ir_node *size_node = type->size_node;
 234         if (size_node == NULL) {
 235                 size_node = expression_to_firm(type->size_expression);
 236                 type->size_node = size_node;
 237         }
 238         return size_node;
 239 }
 240
 241 static unsigned count_parameters(const function_type_t *function_type)
 242 {
 243         unsigned count = 0;
 244
 245         function_parameter_t *parameter = function_type->parameters;
 246         for ( ; parameter != NULL; parameter = parameter->next) {
 247                 ++count;
 248         }
 249
 250         return count;
 251 }
 252
 253 /**
 254  * Creates a Firm type for an atomic type
 255  */
 256 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 257 {
 258         ir_mode        *mode      = atomic_modes[akind];
 259         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 260         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 261         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 262
 263         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 264         set_type_alignment_bytes(irtype, alignment);
 265
 266         return irtype;
 267 }
 268
 269 /**
 270  * Creates a Firm type for a complex type
 271  */
 272 static ir_type *create_complex_type(const atomic_type_t *type)
 273 {
 274         atomic_type_kind_t  kind = type->akind;
 275         ir_mode            *mode = atomic_modes[kind];
 276         ident              *id   = get_mode_ident(mode);
 277
 278         (void) id;
 279
 280         /* FIXME: finish the array */
 281         return NULL;
 282 }
 283
 284 /**
 285  * Creates a Firm type for an imaginary type
 286  */
 287 static ir_type *create_imaginary_type(const atomic_type_t *type)
 288 {
 289         return create_atomic_type(type->akind, (const type_t*)type);
 290 }
 291
 292 /**
 293  * return type of a parameter (and take transparent union gnu extension into
 294  * account)
 295  */
 296 static type_t *get_parameter_type(type_t *orig_type)
 297 {
 298         type_t *type = skip_typeref(orig_type);
 299         if (is_type_union(type)
 300                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 301                 compound_t *compound = type->compound.compound;
 302                 type                 = compound->members.entities->declaration.type;
 303         }
 304
 305         return type;
 306 }
 307
 308 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 309 {
 310         type_t        *return_type  = skip_typeref(function_type->return_type);
 311
 312         int            n_parameters = count_parameters(function_type)
 313                                        + (for_closure ? 1 : 0);
 314         int            n_results    = is_type_void(return_type) ? 0 : 1;
 315         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 316         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 317
 318         if (!is_type_void(return_type)) {
 319                 ir_type *restype = get_ir_type(return_type);
 320                 set_method_res_type(irtype, 0, restype);
 321         }
 322
 323         function_parameter_t *parameter = function_type->parameters;
 324         int                   n         = 0;
 325         if (for_closure) {
 326                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 327                 set_method_param_type(irtype, n, p_irtype);
 328                 ++n;
 329         }
 330         for ( ; parameter != NULL; parameter = parameter->next) {
 331                 type_t  *type     = get_parameter_type(parameter->type);
 332                 ir_type *p_irtype = get_ir_type(type);
 333                 set_method_param_type(irtype, n, p_irtype);
 334                 ++n;
 335         }
 336
 337         bool is_variadic = function_type->variadic;
 338
 339         if (is_variadic)
 340                 set_method_variadicity(irtype, variadicity_variadic);
 341
 342         unsigned cc = get_method_calling_convention(irtype);
 343         switch (function_type->calling_convention) {
 344         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 345         case CC_CDECL:
 346 is_cdecl:
 347                 set_method_calling_convention(irtype, SET_CDECL(cc));
 348                 break;
 349
 350         case CC_STDCALL:
 351                 if (is_variadic)
 352                         goto is_cdecl;
 353
 354                 /* only non-variadic function can use stdcall, else use cdecl */
 355                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 356                 break;
 357
 358         case CC_FASTCALL:
 359                 if (is_variadic)
 360                         goto is_cdecl;
 361                 /* only non-variadic function can use fastcall, else use cdecl */
 362                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 363                 break;
 364
 365         case CC_THISCALL:
 366                 /* Hmm, leave default, not accepted by the parser yet. */
 367                 break;
 368         }
 369
 370         if (for_closure)
 371                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 372
 373         const decl_modifiers_t modifiers = function_type->modifiers;
 374         if (modifiers & DM_CONST)
 375                 add_method_additional_properties(irtype, mtp_property_const);
 376         if (modifiers & DM_PURE)
 377                 add_method_additional_properties(irtype, mtp_property_pure);
 378         if (modifiers & DM_RETURNS_TWICE)
 379                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 380         if (modifiers & DM_NORETURN)
 381                 add_method_additional_properties(irtype, mtp_property_noreturn);
 382         if (modifiers & DM_NOTHROW)
 383                 add_method_additional_properties(irtype, mtp_property_nothrow);
 384         if (modifiers & DM_MALLOC)
 385                 add_method_additional_properties(irtype, mtp_property_malloc);
 386
 387         return irtype;
 388 }
 389
 390 static ir_type *create_pointer_type(pointer_type_t *type)
 391 {
 392         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 393         type_t        *points_to    = type->points_to;
 394         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 395         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 396
 397         return irtype;
 398 }
 399
 400 static ir_type *create_reference_type(reference_type_t *type)
 401 {
 402         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 403         type_t        *refers_to    = type->refers_to;
 404         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 405         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 406
 407         return irtype;
 408 }
 409
 410 static ir_type *create_array_type(array_type_t *type)
 411 {
 412         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 413         type_t        *element_type    = type->element_type;
 414         ir_type       *ir_element_type = get_ir_type(element_type);
 415         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 416
 417         const int align = get_type_alignment_bytes(ir_element_type);
 418         set_type_alignment_bytes(irtype, align);
 419
 420         if (type->size_constant) {
 421                 int n_elements = type->size;
 422
 423                 set_array_bounds_int(irtype, 0, 0, n_elements);
 424
 425                 size_t elemsize = get_type_size_bytes(ir_element_type);
 426                 if (elemsize % align > 0) {
 427                         elemsize += align - (elemsize % align);
 428                 }
 429                 set_type_size_bytes(irtype, n_elements * elemsize);
 430         } else {
 431                 set_array_lower_bound_int(irtype, 0, 0);
 432         }
 433         set_type_state(irtype, layout_fixed);
 434
 435         return irtype;
 436 }
 437
 438 /**
 439  * Return the signed integer type of size bits.
 440  *
 441  * @param size   the size
 442  */
 443 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 444                                                  unsigned size,
 445                                                                                                  const type_t *type)
 446 {
 447         static ir_mode *s_modes[64 + 1] = {NULL, };
 448         ir_type *res;
 449         ir_mode *mode;
 450
 451         if (size <= 0 || size > 64)
 452                 return NULL;
 453
 454         mode = s_modes[size];
 455         if (mode == NULL) {
 456                 char name[32];
 457
 458                 snprintf(name, sizeof(name), "bf_I%u", size);
 459                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 460                 s_modes[size] = mode;
 461         }
 462
 463         type_dbg_info *dbgi = get_type_dbg_info_(type);
 464         res                 = new_d_type_primitive(mode, dbgi);
 465         set_primitive_base_type(res, base_tp);
 466
 467         return res;
 468 }
 469
 470 /**
 471  * Return the unsigned integer type of size bits.
 472  *
 473  * @param size   the size
 474  */
 475 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 476                                                    unsigned size,
 477                                                                                                    const type_t *type)
 478 {
 479         static ir_mode *u_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 = u_modes[size];
 487         if (mode == NULL) {
 488                 char name[32];
 489
 490                 snprintf(name, sizeof(name), "bf_U%u", size);
 491                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 492                 u_modes[size] = mode;
 493         }
 494
 495         type_dbg_info *dbgi = get_type_dbg_info_(type);
 496         res = new_d_type_primitive(mode, dbgi);
 497         set_primitive_base_type(res, base_tp);
 498
 499         return res;
 500 }
 501
 502 static ir_type *create_bitfield_type(const entity_t *entity)
 503 {
 504         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 505         type_t *base = skip_typeref(entity->declaration.type);
 506         assert(is_type_integer(base));
 507         ir_type *irbase = get_ir_type(base);
 508
 509         unsigned bit_size = entity->compound_member.bit_size;
 510
 511         if (is_type_signed(base)) {
 512                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 513         } else {
 514                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 515         }
 516 }
 517
 518 /**
 519  * Construct firm type from ast struct type.
 520  */
 521 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 522 {
 523         compound_t *compound = type->compound;
 524
 525         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 526                 return compound->irtype;
 527         }
 528
 529         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 530
 531         symbol_t *type_symbol = compound->base.symbol;
 532         ident    *id;
 533         if (type_symbol != NULL) {
 534                 id = new_id_from_str(type_symbol->string);
 535         } else {
 536                 if (is_union) {
 537                         id = id_unique("__anonymous_union.%u");
 538                 } else {
 539                         id = id_unique("__anonymous_struct.%u");
 540                 }
 541         }
 542
 543         ir_type *irtype;
 544         if (is_union) {
 545                 irtype = new_type_union(id);
 546         } else {
 547                 irtype = new_type_struct(id);
 548         }
 549
 550         compound->irtype_complete = false;
 551         compound->irtype          = irtype;
 552
 553         if (incomplete)
 554                 return irtype;
 555
 556         if (is_union) {
 557                 layout_union_type(type);
 558         } else {
 559                 layout_struct_type(type);
 560         }
 561
 562         compound->irtype_complete = true;
 563
 564         entity_t *entry = compound->members.entities;
 565         for ( ; entry != NULL; entry = entry->base.next) {
 566                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 567                         continue;
 568
 569                 symbol_t *symbol     = entry->base.symbol;
 570                 type_t   *entry_type = entry->declaration.type;
 571                 ident    *ident;
 572                 if (symbol == NULL) {
 573                         /* anonymous bitfield member, skip */
 574                         if (entry->compound_member.bitfield)
 575                                 continue;
 576                         assert(is_type_compound(entry_type));
 577                         ident = id_unique("anon.%u");
 578                 } else {
 579                         ident = new_id_from_str(symbol->string);
 580                 }
 581
 582                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 583
 584                 ir_type *entry_irtype;
 585                 if (entry->compound_member.bitfield) {
 586                         entry_irtype = create_bitfield_type(entry);
 587                 } else {
 588                         entry_irtype = get_ir_type(entry_type);
 589                 }
 590                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 591
 592                 set_entity_offset(entity, entry->compound_member.offset);
 593                 set_entity_offset_bits_remainder(entity,
 594                                                  entry->compound_member.bit_offset);
 595
 596                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 597                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 598                 entry->compound_member.entity = entity;
 599         }
 600
 601         set_type_alignment_bytes(irtype, compound->alignment);
 602         set_type_size_bytes(irtype, compound->size);
 603         set_type_state(irtype, layout_fixed);
 604
 605         return irtype;
 606 }
 607
 608 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 609
 610 static void determine_enum_values(enum_type_t *const type)
 611 {
 612         ir_mode   *const mode    = atomic_modes[type->base.akind];
 613         ir_tarval *const one     = get_mode_one(mode);
 614         ir_tarval *      tv_next = get_mode_null(mode);
 615
 616         enum_t   *enume = type->enume;
 617         entity_t *entry = enume->base.next;
 618         for (; entry != NULL; entry = entry->base.next) {
 619                 if (entry->kind != ENTITY_ENUM_VALUE)
 620                         break;
 621
 622                 expression_t *const init = entry->enum_value.value;
 623                 if (init != NULL) {
 624                         tv_next = fold_constant_to_tarval(init);
 625                 }
 626                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 627                 entry->enum_value.tv = tv_next;
 628                 tv_next = tarval_add(tv_next, one);
 629         }
 630 }
 631
 632 static ir_type *create_enum_type(enum_type_t *const type)
 633 {
 634         return create_atomic_type(type->base.akind, (const type_t*) type);
 635 }
 636
 637 static ir_type *get_ir_type_incomplete(type_t *type)
 638 {
 639         type = skip_typeref(type);
 640
 641         if (type->base.firm_type != NULL) {
 642                 return type->base.firm_type;
 643         }
 644
 645         if (is_type_compound(type)) {
 646                 return create_compound_type(&type->compound, true);
 647         } else {
 648                 return get_ir_type(type);
 649         }
 650 }
 651
 652 ir_type *get_ir_type(type_t *type)
 653 {
 654         type = skip_typeref(type);
 655
 656         if (type->base.firm_type != NULL) {
 657                 return type->base.firm_type;
 658         }
 659
 660         ir_type *firm_type = NULL;
 661         switch (type->kind) {
 662         case TYPE_ATOMIC:
 663                 firm_type = create_atomic_type(type->atomic.akind, type);
 664                 break;
 665         case TYPE_COMPLEX:
 666                 firm_type = create_complex_type(&type->atomic);
 667                 break;
 668         case TYPE_IMAGINARY:
 669                 firm_type = create_imaginary_type(&type->atomic);
 670                 break;
 671         case TYPE_FUNCTION:
 672                 firm_type = create_method_type(&type->function, false);
 673                 break;
 674         case TYPE_POINTER:
 675                 firm_type = create_pointer_type(&type->pointer);
 676                 break;
 677         case TYPE_REFERENCE:
 678                 firm_type = create_reference_type(&type->reference);
 679                 break;
 680         case TYPE_ARRAY:
 681                 firm_type = create_array_type(&type->array);
 682                 break;
 683         case TYPE_COMPOUND_STRUCT:
 684         case TYPE_COMPOUND_UNION:
 685                 firm_type = create_compound_type(&type->compound, false);
 686                 break;
 687         case TYPE_ENUM:
 688                 firm_type = create_enum_type(&type->enumt);
 689                 break;
 690
 691         case TYPE_ERROR:
 692         case TYPE_TYPEOF:
 693         case TYPE_TYPEDEF:
 694                 break;
 695         }
 696         if (firm_type == NULL)
 697                 panic("unknown type found");
 698
 699         type->base.firm_type = firm_type;
 700         return firm_type;
 701 }
 702
 703 static ir_mode *get_ir_mode_storage(type_t *type)
 704 {
 705         type = skip_typeref(type);
 706
 707         /* Firm doesn't report a mode for arrays and structs/unions. */
 708         if (!is_type_scalar(type)) {
 709                 return mode_P_data;
 710         }
 711
 712         ir_type *const irtype = get_ir_type(type);
 713         ir_mode *const mode   = get_type_mode(irtype);
 714         assert(mode != NULL);
 715         return mode;
 716 }
 717
 718 /*
 719  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 720  * int that it returns bigger modes for floating point on some platforms
 721  * (x87 internally does arithemtic with 80bits)
 722  */
 723 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 724 {
 725         ir_mode *mode = get_ir_mode_storage(type);
 726         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 727                 return mode_float_arithmetic;
 728         }
 729
 730         return mode;
 731 }
 732
 733 /**
 734  * Return a node representing the size of a type.
 735  */
 736 static ir_node *get_type_size_node(type_t *type)
 737 {
 738         unsigned size;
 739         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 740         type = skip_typeref(type);
 741
 742         if (is_type_array(type) && type->array.is_vla) {
 743                 ir_node *size_node = get_vla_size(&type->array);
 744                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 745                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 746                 return real_size;
 747         }
 748
 749         size = get_type_size(type);
 750         return new_Const_long(mode, size);
 751 }
 752
 753 /** Names of the runtime functions. */
 754 static const struct {
 755         int        id;           /**< the rts id */
 756         int        n_res;        /**< number of return values */
 757         const char *name;        /**< the name of the rts function */
 758         int        n_params;     /**< number of parameters */
 759         unsigned   flags;        /**< language flags */
 760 } rts_data[] = {
 761         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 762         { rts_abort,      0, "abort",        0, _C89 },
 763         { rts_alloca,     1, "alloca",       1, _ALL },
 764         { rts_abs,        1, "abs",          1, _C89 },
 765         { rts_labs,       1, "labs",         1, _C89 },
 766         { rts_llabs,      1, "llabs",        1, _C99 },
 767         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 768
 769         { rts_fabs,       1, "fabs",         1, _C89 },
 770         { rts_sqrt,       1, "sqrt",         1, _C89 },
 771         { rts_cbrt,       1, "cbrt",         1, _C99 },
 772         { rts_exp,        1, "exp",          1, _C89 },
 773         { rts_exp2,       1, "exp2",         1, _C89 },
 774         { rts_exp10,      1, "exp10",        1, _GNUC },
 775         { rts_log,        1, "log",          1, _C89 },
 776         { rts_log2,       1, "log2",         1, _C89 },
 777         { rts_log10,      1, "log10",        1, _C89 },
 778         { rts_pow,        1, "pow",          2, _C89 },
 779         { rts_sin,        1, "sin",          1, _C89 },
 780         { rts_cos,        1, "cos",          1, _C89 },
 781         { rts_tan,        1, "tan",          1, _C89 },
 782         { rts_asin,       1, "asin",         1, _C89 },
 783         { rts_acos,       1, "acos",         1, _C89 },
 784         { rts_atan,       1, "atan",         1, _C89 },
 785         { rts_sinh,       1, "sinh",         1, _C89 },
 786         { rts_cosh,       1, "cosh",         1, _C89 },
 787         { rts_tanh,       1, "tanh",         1, _C89 },
 788
 789         { rts_fabsf,      1, "fabsf",        1, _C99 },
 790         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 791         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 792         { rts_expf,       1, "expf",         1, _C99 },
 793         { rts_exp2f,      1, "exp2f",        1, _C99 },
 794         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 795         { rts_logf,       1, "logf",         1, _C99 },
 796         { rts_log2f,      1, "log2f",        1, _C99 },
 797         { rts_log10f,     1, "log10f",       1, _C99 },
 798         { rts_powf,       1, "powf",         2, _C99 },
 799         { rts_sinf,       1, "sinf",         1, _C99 },
 800         { rts_cosf,       1, "cosf",         1, _C99 },
 801         { rts_tanf,       1, "tanf",         1, _C99 },
 802         { rts_asinf,      1, "asinf",        1, _C99 },
 803         { rts_acosf,      1, "acosf",        1, _C99 },
 804         { rts_atanf,      1, "atanf",        1, _C99 },
 805         { rts_sinhf,      1, "sinhf",        1, _C99 },
 806         { rts_coshf,      1, "coshf",        1, _C99 },
 807         { rts_tanhf,      1, "tanhf",        1, _C99 },
 808
 809         { rts_fabsl,      1, "fabsl",        1, _C99 },
 810         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 811         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 812         { rts_expl,       1, "expl",         1, _C99 },
 813         { rts_exp2l,      1, "exp2l",        1, _C99 },
 814         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 815         { rts_logl,       1, "logl",         1, _C99 },
 816         { rts_log2l,      1, "log2l",        1, _C99 },
 817         { rts_log10l,     1, "log10l",       1, _C99 },
 818         { rts_powl,       1, "powl",         2, _C99 },
 819         { rts_sinl,       1, "sinl",         1, _C99 },
 820         { rts_cosl,       1, "cosl",         1, _C99 },
 821         { rts_tanl,       1, "tanl",         1, _C99 },
 822         { rts_asinl,      1, "asinl",        1, _C99 },
 823         { rts_acosl,      1, "acosl",        1, _C99 },
 824         { rts_atanl,      1, "atanl",        1, _C99 },
 825         { rts_sinhl,      1, "sinhl",        1, _C99 },
 826         { rts_coshl,      1, "coshl",        1, _C99 },
 827         { rts_tanhl,      1, "tanhl",        1, _C99 },
 828
 829         { rts_strcmp,     1, "strcmp",       2, _C89 },
 830         { rts_strncmp,    1, "strncmp",      3, _C89 },
 831         { rts_strcpy,     1, "strcpy",       2, _C89 },
 832         { rts_strlen,     1, "strlen",       1, _C89 },
 833         { rts_memcpy,     1, "memcpy",       3, _C89 },
 834         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 835         { rts_memmove,    1, "memmove",      3, _C89 },
 836         { rts_memset,     1, "memset",       3, _C89 },
 837         { rts_memcmp,     1, "memcmp",       3, _C89 },
 838 };
 839
 840 static ident *rts_idents[lengthof(rts_data)];
 841
 842 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 843
 844 void set_create_ld_ident(ident *(*func)(entity_t*))
 845 {
 846         create_ld_ident = func;
 847 }
 848
 849 static bool declaration_is_definition(const entity_t *entity)
 850 {
 851         switch (entity->kind) {
 852         case ENTITY_VARIABLE:
 853                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 854         case ENTITY_FUNCTION:
 855                 return entity->function.statement != NULL;
 856         case ENTITY_PARAMETER:
 857         case ENTITY_COMPOUND_MEMBER:
 858                 return false;
 859         case ENTITY_TYPEDEF:
 860         case ENTITY_ENUM:
 861         case ENTITY_ENUM_VALUE:
 862         case ENTITY_NAMESPACE:
 863         case ENTITY_LABEL:
 864         case ENTITY_LOCAL_LABEL:
 865                 break;
 866         }
 867         panic("declaration_is_definition called on non-declaration");
 868 }
 869
 870 /**
 871  * Handle GNU attributes for entities
 872  *
 873  * @param ent   the entity
 874  * @param decl  the routine declaration
 875  */
 876 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 877 {
 878         assert(is_declaration(entity));
 879         decl_modifiers_t modifiers = entity->declaration.modifiers;
 880
 881         if (is_method_entity(irentity)) {
 882                 if (modifiers & DM_PURE) {
 883                         set_entity_additional_properties(irentity, mtp_property_pure);
 884                 }
 885                 if (modifiers & DM_CONST) {
 886                         add_entity_additional_properties(irentity, mtp_property_const);
 887                 }
 888         }
 889         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 890                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 891         }
 892         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 893             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 894                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 895         }
 896 }
 897
 898 static bool is_main(entity_t *entity)
 899 {
 900         static symbol_t *sym_main = NULL;
 901         if (sym_main == NULL) {
 902                 sym_main = symbol_table_insert("main");
 903         }
 904
 905         if (entity->base.symbol != sym_main)
 906                 return false;
 907         /* must be in outermost scope */
 908         if (entity->base.parent_scope != &current_translation_unit->scope)
 909                 return false;
 910
 911         return true;
 912 }
 913
 914 /**
 915  * Creates an entity representing a function.
 916  *
 917  * @param entity       the function declaration/definition
 918  * @param owner_type   the owner type of this function, NULL
 919  *                     for global functions
 920  */
 921 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 922 {
 923         assert(entity->kind == ENTITY_FUNCTION);
 924         if (entity->function.irentity != NULL)
 925                 return entity->function.irentity;
 926
 927         switch (entity->function.btk) {
 928         case BUILTIN_NONE:
 929         case BUILTIN_LIBC:
 930         case BUILTIN_LIBC_CHECK:
 931                 break;
 932         default:
 933                 return NULL;
 934         }
 935
 936         symbol_t *symbol = entity->base.symbol;
 937         ident    *id     = new_id_from_str(symbol->string);
 938
 939         /* already an entity defined? */
 940         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 941         bool const has_body = entity->function.statement != NULL;
 942         if (irentity != NULL) {
 943                 goto entity_created;
 944         }
 945
 946         ir_type *ir_type_method;
 947         if (entity->function.need_closure)
 948                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 949         else
 950                 ir_type_method = get_ir_type(entity->declaration.type);
 951
 952         bool nested_function = false;
 953         if (owner_type == NULL)
 954                 owner_type = get_glob_type();
 955         else
 956                 nested_function = true;
 957
 958         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 959         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 960
 961         ident *ld_id;
 962         if (nested_function)
 963                 ld_id = id_unique("inner.%u");
 964         else
 965                 ld_id = create_ld_ident(entity);
 966         set_entity_ld_ident(irentity, ld_id);
 967
 968         handle_decl_modifiers(irentity, entity);
 969
 970         if (! nested_function) {
 971                 storage_class_tag_t const storage_class
 972                         = (storage_class_tag_t) entity->declaration.storage_class;
 973                 if (storage_class == STORAGE_CLASS_STATIC) {
 974                     set_entity_visibility(irentity, ir_visibility_local);
 975                 } else {
 976                     set_entity_visibility(irentity, ir_visibility_external);
 977                 }
 978
 979                 bool const is_inline = entity->function.is_inline;
 980                 if (is_inline && has_body) {
 981                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
 982                             || ((c_mode & _C99) == 0
 983                                 && storage_class == STORAGE_CLASS_EXTERN)) {
 984                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
 985                         }
 986                 }
 987         } else {
 988                 /* nested functions are always local */
 989                 set_entity_visibility(irentity, ir_visibility_local);
 990         }
 991
 992         /* We should check for file scope here, but as long as we compile C only
 993            this is not needed. */
 994         if (!freestanding && !has_body) {
 995                 /* check for a known runtime function */
 996                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
 997                         if (id != rts_idents[i])
 998                                 continue;
 999
1000                         function_type_t *function_type
1001                                 = &entity->declaration.type->function;
1002                         /* rts_entities code can't handle a "wrong" number of parameters */
1003                         if (function_type->unspecified_parameters)
1004                                 continue;
1005
1006                         /* check number of parameters */
1007                         int n_params = count_parameters(function_type);
1008                         if (n_params != rts_data[i].n_params)
1009                                 continue;
1010
1011                         type_t *return_type = skip_typeref(function_type->return_type);
1012                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1013                         if (n_res != rts_data[i].n_res)
1014                                 continue;
1015
1016                         /* ignore those rts functions not necessary needed for current mode */
1017                         if ((c_mode & rts_data[i].flags) == 0)
1018                                 continue;
1019                         assert(rts_entities[rts_data[i].id] == NULL);
1020                         rts_entities[rts_data[i].id] = irentity;
1021                 }
1022         }
1023
1024         entitymap_insert(&entitymap, symbol, irentity);
1025
1026 entity_created:
1027         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1028         entity->function.irentity = irentity;
1029
1030         return irentity;
1031 }
1032
1033 /**
1034  * Creates a SymConst for a given entity.
1035  *
1036  * @param dbgi    debug info
1037  * @param entity  the entity
1038  */
1039 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1040 {
1041         assert(entity != NULL);
1042         union symconst_symbol sym;
1043         sym.entity_p = entity;
1044         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1045 }
1046
1047 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1048 {
1049         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1050 }
1051
1052 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1053                                    ir_mode *dest_mode)
1054 {
1055         if (is_Const(value)) {
1056                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1057         }
1058
1059         ir_node *cond       = new_d_Cond(dbgi, value);
1060         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1061         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1062         ir_node *tblock     = new_Block(1, &proj_true);
1063         ir_node *fblock     = new_Block(1, &proj_false);
1064         set_cur_block(tblock);
1065         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1066         ir_node *tjump  = new_Jmp();
1067         set_cur_block(fblock);
1068         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1069         ir_node *fjump  = new_Jmp();
1070
1071         ir_node *in[2]      = { tjump, fjump };
1072         ir_node *mergeblock = new_Block(2, in);
1073         set_cur_block(mergeblock);
1074         ir_node *phi_in[2]  = { const1, const0 };
1075         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1076         return phi;
1077 }
1078
1079 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1080 {
1081         ir_mode *value_mode = get_irn_mode(value);
1082
1083         if (value_mode == dest_mode)
1084                 return value;
1085
1086         if (dest_mode == mode_b) {
1087                 ir_node *zero = new_Const(get_mode_null(value_mode));
1088                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1089                 return cmp;
1090         } else if (value_mode == mode_b) {
1091                 return create_conv_from_b(dbgi, value, dest_mode);
1092         }
1093
1094         return new_d_Conv(dbgi, value, dest_mode);
1095 }
1096
1097 /**
1098  * Creates a SymConst node representing a string constant.
1099  *
1100  * @param src_pos    the source position of the string constant
1101  * @param id_prefix  a prefix for the name of the generated string constant
1102  * @param value      the value of the string constant
1103  */
1104 static ir_node *string_to_firm(source_position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1105 {
1106         size_t            const slen        = get_string_len(value) + 1;
1107         ir_initializer_t *const initializer = create_initializer_compound(slen);
1108         ir_type          *      elem_type;
1109         switch (value->encoding) {
1110         case STRING_ENCODING_CHAR: {
1111                 elem_type = ir_type_char;
1112
1113                 ir_mode *const mode = get_type_mode(elem_type);
1114                 char const    *p    = value->begin;
1115                 for (size_t i = 0; i < slen; ++i) {
1116                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1117                         ir_initializer_t *val = create_initializer_tarval(tv);
1118                         set_initializer_compound_value(initializer, i, val);
1119                 }
1120                 goto finish;
1121         }
1122
1123         case STRING_ENCODING_WIDE: {
1124                 elem_type = ir_type_wchar_t;
1125
1126                 ir_mode *const mode = get_type_mode(elem_type);
1127                 char const    *p    = value->begin;
1128                 for (size_t i = 0; i < slen; ++i) {
1129                         assert(p <= value->begin + value->size);
1130                         utf32             v   = read_utf8_char(&p);
1131                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1132                         ir_initializer_t *val = create_initializer_tarval(tv);
1133                         set_initializer_compound_value(initializer, i, val);
1134                 }
1135                 goto finish;
1136         }
1137         }
1138         panic("invalid string encoding");
1139
1140 finish:;
1141         ir_type *const type = new_type_array(1, elem_type);
1142         set_array_bounds_int(type, 0, 0, slen);
1143         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1144         set_type_state(      type, layout_fixed);
1145
1146         ir_type   *const global_type = get_glob_type();
1147         ident     *const id          = id_unique(id_prefix);
1148         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1149         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1150         set_entity_ld_ident(   entity, id);
1151         set_entity_visibility( entity, ir_visibility_private);
1152         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1153         set_entity_initializer(entity, initializer);
1154
1155         return create_symconst(dbgi, entity);
1156 }
1157
1158 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1159 {
1160         assert(type->kind == TYPE_ATOMIC);
1161         atomic_type_kind_t akind = type->atomic.akind;
1162
1163         ir_mode    *const mode = atomic_modes[akind];
1164         char const *const str  = literal->value.begin;
1165         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1166         if (tv == tarval_bad)
1167                 return false;
1168
1169         literal->base.type    = type;
1170         literal->target_value = tv;
1171         return true;
1172 }
1173
1174 void determine_literal_type(literal_expression_t *const literal)
1175 {
1176         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1177
1178         /* -1: signed only, 0: any, 1: unsigned only */
1179         int const sign =
1180                 !is_type_signed(literal->base.type) ? 1 :
1181                 literal->value.begin[0] == '0'      ? 0 :
1182                 -1; /* Decimal literals only try signed types. */
1183
1184         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1185         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1186
1187         if (try_create_integer(literal, literal->base.type))
1188                 goto finished;
1189
1190         /* now try if the constant is small enough for some types */
1191         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1192                 goto finished;
1193         if (sign <= 0 && try_create_integer(literal, type_long))
1194                 goto finished;
1195         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1196                 goto finished;
1197         /* last try? then we should not report tarval_bad */
1198         if (sign < 0)
1199                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1200         if (sign <= 0 && try_create_integer(literal, type_long_long))
1201                 goto finished;
1202
1203         /* last try */
1204         assert(sign >= 0);
1205         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1206         bool res = try_create_integer(literal, type_unsigned_long_long);
1207         if (!res)
1208                 panic("internal error when parsing number literal");
1209
1210 finished:
1211         tarval_set_integer_overflow_mode(old_mode);
1212 }
1213
1214 /**
1215  * Creates a Const node representing a constant.
1216  */
1217 static ir_node *literal_to_firm(const literal_expression_t *literal)
1218 {
1219         type_t     *type   = skip_typeref(literal->base.type);
1220         ir_mode    *mode   = get_ir_mode_storage(type);
1221         const char *string = literal->value.begin;
1222         size_t      size   = literal->value.size;
1223         ir_tarval  *tv;
1224
1225         switch (literal->base.kind) {
1226         case EXPR_LITERAL_INTEGER:
1227                 assert(literal->target_value != NULL);
1228                 tv = literal->target_value;
1229                 break;
1230
1231         case EXPR_LITERAL_FLOATINGPOINT:
1232                 tv = new_tarval_from_str(string, size, mode);
1233                 break;
1234
1235         case EXPR_LITERAL_BOOLEAN:
1236                 if (string[0] == 't') {
1237                         tv = get_mode_one(mode);
1238                 } else {
1239                         assert(string[0] == 'f');
1240         case EXPR_LITERAL_MS_NOOP:
1241                         tv = get_mode_null(mode);
1242                 }
1243                 break;
1244
1245         default:
1246                 panic("Invalid literal kind found");
1247         }
1248
1249         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1250         ir_node  *res        = new_d_Const(dbgi, tv);
1251         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1252         return create_conv(dbgi, res, mode_arith);
1253 }
1254
1255 /**
1256  * Creates a Const node representing a character constant.
1257  */
1258 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1259 {
1260         type_t     *type   = skip_typeref(literal->base.type);
1261         ir_mode    *mode   = get_ir_mode_storage(type);
1262         const char *string = literal->value.begin;
1263         size_t      size   = literal->value.size;
1264         ir_tarval  *tv;
1265
1266         switch (literal->value.encoding) {
1267         case STRING_ENCODING_WIDE: {
1268                 utf32  v = read_utf8_char(&string);
1269                 char   buf[128];
1270                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1271
1272                 tv = new_tarval_from_str(buf, len, mode);
1273                 break;
1274         }
1275
1276         case STRING_ENCODING_CHAR: {
1277                 long long int v;
1278                 bool char_is_signed
1279                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1280                 if (size == 1 && char_is_signed) {
1281                         v = (signed char)string[0];
1282                 } else {
1283                         v = 0;
1284                         for (size_t i = 0; i < size; ++i) {
1285                                 v = (v << 8) | ((unsigned char)string[i]);
1286                         }
1287                 }
1288                 char   buf[128];
1289                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1290
1291                 tv = new_tarval_from_str(buf, len, mode);
1292                 break;
1293         }
1294
1295         default:
1296                 panic("Invalid literal kind found");
1297         }
1298
1299         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1300         ir_node  *res        = new_d_Const(dbgi, tv);
1301         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1302         return create_conv(dbgi, res, mode_arith);
1303 }
1304
1305 /*
1306  * Allocate an area of size bytes aligned at alignment
1307  * at a frame type.
1308  */
1309 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1310 {
1311         static unsigned area_cnt = 0;
1312         char buf[32];
1313
1314         ir_type *tp = new_type_array(1, ir_type_char);
1315         set_array_bounds_int(tp, 0, 0, size);
1316         set_type_alignment_bytes(tp, alignment);
1317
1318         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1319         ident *name = new_id_from_str(buf);
1320         ir_entity *area = new_entity(frame_type, name, tp);
1321
1322         /* mark this entity as compiler generated */
1323         set_entity_compiler_generated(area, 1);
1324         return area;
1325 }
1326
1327 /**
1328  * Return a node representing a trampoline region
1329  * for a given function entity.
1330  *
1331  * @param dbgi    debug info
1332  * @param entity  the function entity
1333  */
1334 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1335 {
1336         ir_entity *region = NULL;
1337         int        i;
1338
1339         if (current_trampolines != NULL) {
1340                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1341                         if (current_trampolines[i].function == entity) {
1342                                 region = current_trampolines[i].region;
1343                                 break;
1344                         }
1345                 }
1346         } else {
1347                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1348         }
1349         ir_graph *irg = current_ir_graph;
1350         if (region == NULL) {
1351                 /* create a new region */
1352                 ir_type           *frame_tp = get_irg_frame_type(irg);
1353                 trampoline_region  reg;
1354                 reg.function = entity;
1355
1356                 reg.region   = alloc_trampoline(frame_tp,
1357                                                 be_params->trampoline_size,
1358                                                 be_params->trampoline_align);
1359                 ARR_APP1(trampoline_region, current_trampolines, reg);
1360                 region = reg.region;
1361         }
1362         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1363                                region);
1364 }
1365
1366 /**
1367  * Creates a trampoline for a function represented by an entity.
1368  *
1369  * @param dbgi    debug info
1370  * @param mode    the (reference) mode for the function address
1371  * @param entity  the function entity
1372  */
1373 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1374                                   ir_entity *entity)
1375 {
1376         assert(entity != NULL);
1377         ir_node *in[3];
1378         in[0] = get_trampoline_region(dbgi, entity);
1379         in[1] = create_symconst(dbgi, entity);
1380         in[2] = get_irg_frame(current_ir_graph);
1381
1382         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1383         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1384         return new_Proj(irn, mode, pn_Builtin_max+1);
1385 }
1386
1387 /**
1388  * Dereference an address.
1389  *
1390  * @param dbgi  debug info
1391  * @param type  the type of the dereferenced result (the points_to type)
1392  * @param addr  the address to dereference
1393  */
1394 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1395                                       ir_node *const addr)
1396 {
1397         type_t *skipped = skip_typeref(type);
1398         if (is_type_incomplete(skipped))
1399                 return addr;
1400
1401         ir_type *irtype = get_ir_type(skipped);
1402         if (is_compound_type(irtype)
1403             || is_Method_type(irtype)
1404             || is_Array_type(irtype)) {
1405                 return addr;
1406         }
1407
1408         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1409                                   ? cons_volatile : cons_none;
1410         ir_mode *const mode     = get_type_mode(irtype);
1411         ir_node *const memory   = get_store();
1412         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1413         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1414         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1415
1416         set_store(load_mem);
1417
1418         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1419         return create_conv(dbgi, load_res, mode_arithmetic);
1420 }
1421
1422 /**
1423  * Returns the correct base address depending on whether it is a parameter or a
1424  * normal local variable.
1425  */
1426 static ir_node *get_local_frame(ir_entity *const ent)
1427 {
1428         ir_graph      *const irg   = current_ir_graph;
1429         const ir_type *const owner = get_entity_owner(ent);
1430         if (owner == current_outer_frame) {
1431                 assert(current_static_link != NULL);
1432                 return current_static_link;
1433         } else {
1434                 return get_irg_frame(irg);
1435         }
1436 }
1437
1438 /**
1439  * Keep all memory edges of the given block.
1440  */
1441 static void keep_all_memory(ir_node *block)
1442 {
1443         ir_node *old = get_cur_block();
1444
1445         set_cur_block(block);
1446         keep_alive(get_store());
1447         /* TODO: keep all memory edges from restricted pointers */
1448         set_cur_block(old);
1449 }
1450
1451 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1452 {
1453         entity_t *entity = ref->entity;
1454         if (entity->enum_value.tv == NULL) {
1455                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1456                 assert(type->kind == TYPE_ENUM);
1457                 determine_enum_values(&type->enumt);
1458         }
1459
1460         return new_Const(entity->enum_value.tv);
1461 }
1462
1463 static ir_node *reference_addr(const reference_expression_t *ref)
1464 {
1465         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1466         entity_t *entity = ref->entity;
1467         assert(is_declaration(entity));
1468
1469         if (entity->kind == ENTITY_FUNCTION
1470             && entity->function.btk != BUILTIN_NONE) {
1471                 ir_entity *irentity = get_function_entity(entity, NULL);
1472                 /* for gcc compatibility we have to produce (dummy) addresses for some
1473                  * builtins which don't have entities */
1474                 if (irentity == NULL) {
1475                         source_position_t const *const pos = &ref->base.source_position;
1476                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1477
1478                         /* simply create a NULL pointer */
1479                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1480                         ir_node  *res  = new_Const(get_mode_null(mode));
1481
1482                         return res;
1483                 }
1484         }
1485
1486         switch((declaration_kind_t) entity->declaration.kind) {
1487         case DECLARATION_KIND_UNKNOWN:
1488                 break;
1489         case DECLARATION_KIND_PARAMETER:
1490         case DECLARATION_KIND_LOCAL_VARIABLE:
1491                 /* you can store to a local variable (so we don't panic but return NULL
1492                  * as an indicator for no real address) */
1493                 return NULL;
1494         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1495                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1496                 return addr;
1497         }
1498
1499         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1500         case DECLARATION_KIND_PARAMETER_ENTITY: {
1501                 ir_entity *irentity = entity->variable.v.entity;
1502                 ir_node   *frame    = get_local_frame(irentity);
1503                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1504                 return sel;
1505         }
1506
1507         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1508                 return entity->variable.v.vla_base;
1509
1510         case DECLARATION_KIND_FUNCTION: {
1511                 return create_symconst(dbgi, entity->function.irentity);
1512         }
1513
1514         case DECLARATION_KIND_INNER_FUNCTION: {
1515                 type_t  *const type = skip_typeref(entity->declaration.type);
1516                 ir_mode *const mode = get_ir_mode_storage(type);
1517                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1518                         /* inner function not using the closure */
1519                         return create_symconst(dbgi, entity->function.irentity);
1520                 } else {
1521                         /* need trampoline here */
1522                         return create_trampoline(dbgi, mode, entity->function.irentity);
1523                 }
1524         }
1525
1526         case DECLARATION_KIND_COMPOUND_MEMBER:
1527                 panic("not implemented reference type");
1528         }
1529
1530         panic("reference to declaration with unknown type found");
1531 }
1532
1533 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1534 {
1535         dbg_info *const dbgi   = get_dbg_info(&ref->base.source_position);
1536         entity_t *const entity = ref->entity;
1537         assert(is_declaration(entity));
1538
1539         switch ((declaration_kind_t)entity->declaration.kind) {
1540         case DECLARATION_KIND_LOCAL_VARIABLE:
1541         case DECLARATION_KIND_PARAMETER: {
1542                 type_t  *const type  = skip_typeref(entity->declaration.type);
1543                 ir_mode *const mode  = get_ir_mode_storage(type);
1544                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1545                 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1546         }
1547
1548         default: {
1549                 ir_node *const addr = reference_addr(ref);
1550                 return deref_address(dbgi, entity->declaration.type, addr);
1551         }
1552         }
1553 }
1554
1555 /**
1556  * Transform calls to builtin functions.
1557  */
1558 static ir_node *process_builtin_call(const call_expression_t *call)
1559 {
1560         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1561
1562         assert(call->function->kind == EXPR_REFERENCE);
1563         reference_expression_t *builtin = &call->function->reference;
1564
1565         type_t *expr_type = skip_typeref(builtin->base.type);
1566         assert(is_type_pointer(expr_type));
1567
1568         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1569
1570         switch (builtin->entity->function.btk) {
1571         case BUILTIN_NONE:
1572                 break;
1573         case BUILTIN_ALLOCA: {
1574                 expression_t *argument = call->arguments->expression;
1575                 ir_node      *size     = expression_to_firm(argument);
1576
1577                 ir_node *store  = get_store();
1578                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1579                                               stack_alloc);
1580                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1581                 set_store(proj_m);
1582                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1583
1584                 return res;
1585         }
1586         case BUILTIN_INF: {
1587                 type_t    *type = function_type->function.return_type;
1588                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1589                 ir_tarval *tv   = get_mode_infinite(mode);
1590                 ir_node   *res  = new_d_Const(dbgi, tv);
1591                 return res;
1592         }
1593         case BUILTIN_NAN: {
1594                 /* Ignore string for now... */
1595                 assert(is_type_function(function_type));
1596                 type_t    *type = function_type->function.return_type;
1597                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1598                 ir_tarval *tv   = get_mode_NAN(mode);
1599                 ir_node   *res  = new_d_Const(dbgi, tv);
1600                 return res;
1601         }
1602         case BUILTIN_EXPECT: {
1603                 expression_t *argument = call->arguments->expression;
1604                 return _expression_to_firm(argument);
1605         }
1606         case BUILTIN_VA_END:
1607                 /* evaluate the argument of va_end for its side effects */
1608                 _expression_to_firm(call->arguments->expression);
1609                 return NULL;
1610         case BUILTIN_OBJECT_SIZE: {
1611                 /* determine value of "type" */
1612                 expression_t *type_expression = call->arguments->next->expression;
1613                 long          type_val        = fold_constant_to_int(type_expression);
1614                 type_t       *type            = function_type->function.return_type;
1615                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1616                 /* just produce a "I don't know" result */
1617                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1618                                                 get_mode_minus_one(mode);
1619
1620                 return new_d_Const(dbgi, result);
1621         }
1622         case BUILTIN_ROTL: {
1623                 ir_node *val  = expression_to_firm(call->arguments->expression);
1624                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1625                 ir_mode *mode = get_irn_mode(val);
1626                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1627                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1628         }
1629         case BUILTIN_ROTR: {
1630                 ir_node *val  = expression_to_firm(call->arguments->expression);
1631                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1632                 ir_mode *mode = get_irn_mode(val);
1633                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1634                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1635                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1636                 return new_d_Rotl(dbgi, val, sub, mode);
1637         }
1638         case BUILTIN_FIRM:
1639                 break;
1640         case BUILTIN_LIBC:
1641         case BUILTIN_LIBC_CHECK:
1642                 panic("builtin did not produce an entity");
1643         }
1644         panic("invalid builtin found");
1645 }
1646
1647 /**
1648  * Transform a call expression.
1649  * Handles some special cases, like alloca() calls, which must be resolved
1650  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1651  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1652  * handled right...
1653  */
1654 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1655 {
1656         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1657         assert(currently_reachable());
1658
1659         expression_t   *function = call->function;
1660         ir_node        *callee   = NULL;
1661         bool            firm_builtin = false;
1662         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1663         if (function->kind == EXPR_REFERENCE) {
1664                 const reference_expression_t *ref    = &function->reference;
1665                 entity_t                     *entity = ref->entity;
1666
1667                 if (entity->kind == ENTITY_FUNCTION) {
1668                         builtin_kind_t builtin = entity->function.btk;
1669                         if (builtin == BUILTIN_FIRM) {
1670                                 firm_builtin = true;
1671                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1672                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1673                                    && builtin != BUILTIN_LIBC_CHECK) {
1674                                 return process_builtin_call(call);
1675                         }
1676                 }
1677         }
1678         if (!firm_builtin)
1679                 callee = expression_to_firm(function);
1680
1681         type_t *type = skip_typeref(function->base.type);
1682         assert(is_type_pointer(type));
1683         pointer_type_t *pointer_type = &type->pointer;
1684         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1685         assert(is_type_function(points_to));
1686         function_type_t *function_type = &points_to->function;
1687
1688         int      n_parameters    = 0;
1689         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1690         ir_type *new_method_type = NULL;
1691         if (function_type->variadic || function_type->unspecified_parameters) {
1692                 const call_argument_t *argument = call->arguments;
1693                 for ( ; argument != NULL; argument = argument->next) {
1694                         ++n_parameters;
1695                 }
1696
1697                 /* we need to construct a new method type matching the call
1698                  * arguments... */
1699                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1700                 int n_res       = get_method_n_ress(ir_method_type);
1701                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1702                 set_method_calling_convention(new_method_type,
1703                                get_method_calling_convention(ir_method_type));
1704                 set_method_additional_properties(new_method_type,
1705                                get_method_additional_properties(ir_method_type));
1706                 set_method_variadicity(new_method_type,
1707                                        get_method_variadicity(ir_method_type));
1708
1709                 for (int i = 0; i < n_res; ++i) {
1710                         set_method_res_type(new_method_type, i,
1711                                             get_method_res_type(ir_method_type, i));
1712                 }
1713                 argument = call->arguments;
1714                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1715                         expression_t *expression = argument->expression;
1716                         ir_type      *irtype     = get_ir_type(expression->base.type);
1717                         set_method_param_type(new_method_type, i, irtype);
1718                 }
1719                 ir_method_type = new_method_type;
1720         } else {
1721                 n_parameters = get_method_n_params(ir_method_type);
1722         }
1723
1724         ir_node *in[n_parameters];
1725
1726         const call_argument_t *argument = call->arguments;
1727         for (int n = 0; n < n_parameters; ++n) {
1728                 expression_t *expression = argument->expression;
1729                 ir_node      *arg_node   = expression_to_firm(expression);
1730
1731                 type_t *arg_type = skip_typeref(expression->base.type);
1732                 if (!is_type_compound(arg_type)) {
1733                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1734                         arg_node = create_conv(dbgi, arg_node, mode);
1735                 }
1736
1737                 in[n] = arg_node;
1738
1739                 argument = argument->next;
1740         }
1741
1742         ir_node *store;
1743         if (function_type->modifiers & DM_CONST) {
1744                 store = get_irg_no_mem(current_ir_graph);
1745         } else {
1746                 store = get_store();
1747         }
1748
1749         ir_node *node;
1750         type_t  *return_type = skip_typeref(function_type->return_type);
1751         ir_node *result      = NULL;
1752         if (firm_builtin) {
1753                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1754                                      ir_method_type);
1755                 if (! (function_type->modifiers & DM_CONST)) {
1756                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1757                         set_store(mem);
1758                 }
1759
1760                 if (!is_type_void(return_type)) {
1761                         assert(is_type_scalar(return_type));
1762                         ir_mode *mode = get_ir_mode_storage(return_type);
1763                         result = new_Proj(node, mode, pn_Builtin_max+1);
1764                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1765                         result              = create_conv(NULL, result, mode_arith);
1766                 }
1767         } else {
1768                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1769                 if (! (function_type->modifiers & DM_CONST)) {
1770                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1771                         set_store(mem);
1772                 }
1773
1774                 if (!is_type_void(return_type)) {
1775                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1776                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1777                         result                    = new_Proj(resproj, mode, 0);
1778                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1779                         result                    = create_conv(NULL, result, mode_arith);
1780                 }
1781         }
1782
1783         if (function_type->modifiers & DM_NORETURN) {
1784                 /* A dead end:  Keep the Call and the Block.  Also place all further
1785                  * nodes into a new and unreachable block. */
1786                 keep_alive(node);
1787                 keep_alive(get_cur_block());
1788                 ir_node *block = new_Block(0, NULL);
1789                 set_cur_block(block);
1790         }
1791
1792         return result;
1793 }
1794
1795 static ir_node *statement_to_firm(statement_t *statement);
1796 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1797
1798 static ir_node *expression_to_addr(const expression_t *expression);
1799 static ir_node *create_condition_evaluation(const expression_t *expression,
1800                                             ir_node *true_block,
1801                                             ir_node *false_block);
1802
1803 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1804                          ir_node *value)
1805 {
1806         if (!is_type_compound(type)) {
1807                 ir_mode *mode = get_ir_mode_storage(type);
1808                 value         = create_conv(dbgi, value, mode);
1809         }
1810
1811         ir_node *memory = get_store();
1812
1813         if (is_type_scalar(type)) {
1814                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1815                                       ? cons_volatile : cons_none;
1816                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1817                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1818                 set_store(store_mem);
1819         } else {
1820                 ir_type *irtype    = get_ir_type(type);
1821                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1822                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1823                 set_store(copyb_mem);
1824         }
1825 }
1826
1827 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1828 {
1829         ir_tarval *all_one   = get_mode_all_one(mode);
1830         int        mode_size = get_mode_size_bits(mode);
1831         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1832
1833         assert(offset >= 0);
1834         assert(size   >= 0);
1835         assert(offset + size <= mode_size);
1836         if (size == mode_size) {
1837                 return all_one;
1838         }
1839
1840         long       shiftr    = get_mode_size_bits(mode) - size;
1841         long       shiftl    = offset;
1842         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1843         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1844         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1845         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1846
1847         return mask1;
1848 }
1849
1850 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1851                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1852                 bool need_return)
1853 {
1854         ir_type *entity_type = get_entity_type(entity);
1855         ir_type *base_type   = get_primitive_base_type(entity_type);
1856         ir_mode *mode        = get_type_mode(base_type);
1857         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1858
1859         value = create_conv(dbgi, value, mode);
1860
1861         /* kill upper bits of value and shift to right position */
1862         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1863         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1864         unsigned  base_bits  = get_mode_size_bits(mode);
1865         unsigned  shiftwidth = base_bits - bitsize;
1866
1867         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1868         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1869
1870         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1871         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1872         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1873
1874         /* load current value */
1875         ir_node   *mem             = get_store();
1876         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1877                                           set_volatile ? cons_volatile : cons_none);
1878         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1879         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1880         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1881         ir_tarval *inv_mask        = tarval_not(shift_mask);
1882         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1883         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1884
1885         /* construct new value and store */
1886         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1887         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1888                                          set_volatile ? cons_volatile : cons_none);
1889         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1890         set_store(store_mem);
1891
1892         if (!need_return)
1893                 return NULL;
1894
1895         ir_node *res_shr;
1896         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1897         if (mode_is_signed(mode)) {
1898                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1899         } else {
1900                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1901         }
1902         return res_shr;
1903 }
1904
1905 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1906                                          ir_node *addr)
1907 {
1908         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
1909         entity_t *entity    = expression->compound_entry;
1910         type_t   *base_type = entity->declaration.type;
1911         ir_mode  *mode      = get_ir_mode_storage(base_type);
1912         ir_node  *mem       = get_store();
1913         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1914         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1915         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1916         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1917
1918         ir_mode  *amode     = mode;
1919         /* optimisation, since shifting in modes < machine_size is usually
1920          * less efficient */
1921         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1922                 amode = mode_uint;
1923         }
1924         unsigned amode_size = get_mode_size_bits(amode);
1925         load_res = create_conv(dbgi, load_res, amode);
1926
1927         set_store(load_mem);
1928
1929         /* kill upper bits */
1930         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1931         unsigned   bitoffset   = entity->compound_member.bit_offset;
1932         unsigned   bitsize     = entity->compound_member.bit_size;
1933         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1934         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1935         ir_node   *countl      = new_d_Const(dbgi, tvl);
1936         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1937
1938         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1939         assert(shift_bitsr <= amode_size);
1940         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1941         ir_node   *countr      = new_d_Const(dbgi, tvr);
1942         ir_node   *shiftr;
1943         if (mode_is_signed(mode)) {
1944                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1945         } else {
1946                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1947         }
1948
1949         type_t  *type    = expression->base.type;
1950         ir_mode *resmode = get_ir_mode_arithmetic(type);
1951         return create_conv(dbgi, shiftr, resmode);
1952 }
1953
1954 /* make sure the selected compound type is constructed */
1955 static void construct_select_compound(const select_expression_t *expression)
1956 {
1957         type_t *type = skip_typeref(expression->compound->base.type);
1958         if (is_type_pointer(type)) {
1959                 type = type->pointer.points_to;
1960         }
1961         (void) get_ir_type(type);
1962 }
1963
1964 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1965                                               ir_node *value, ir_node *addr)
1966 {
1967         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1968         type_t   *type = skip_typeref(expression->base.type);
1969
1970         if (!is_type_compound(type)) {
1971                 ir_mode  *mode = get_ir_mode_storage(type);
1972                 value          = create_conv(dbgi, value, mode);
1973         }
1974
1975         if (expression->kind == EXPR_REFERENCE) {
1976                 const reference_expression_t *ref = &expression->reference;
1977
1978                 entity_t *entity = ref->entity;
1979                 assert(is_declaration(entity));
1980                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1981                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1982                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1983                         set_value(entity->variable.v.value_number, value);
1984                         return value;
1985                 }
1986         }
1987
1988         if (addr == NULL)
1989                 addr = expression_to_addr(expression);
1990         assert(addr != NULL);
1991
1992         if (expression->kind == EXPR_SELECT) {
1993                 const select_expression_t *select = &expression->select;
1994
1995                 construct_select_compound(select);
1996
1997                 entity_t *entity = select->compound_entry;
1998                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1999                 if (entity->compound_member.bitfield) {
2000                         ir_entity *irentity = entity->compound_member.entity;
2001                         bool       set_volatile
2002                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2003                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2004                                                        set_volatile, true);
2005                         return value;
2006                 }
2007         }
2008
2009         assign_value(dbgi, addr, type, value);
2010         return value;
2011 }
2012
2013 static void set_value_for_expression(const expression_t *expression,
2014                                      ir_node *value)
2015 {
2016         set_value_for_expression_addr(expression, value, NULL);
2017 }
2018
2019 static ir_node *get_value_from_lvalue(const expression_t *expression,
2020                                       ir_node *addr)
2021 {
2022         if (expression->kind == EXPR_REFERENCE) {
2023                 const reference_expression_t *ref = &expression->reference;
2024
2025                 entity_t *entity = ref->entity;
2026                 assert(entity->kind == ENTITY_VARIABLE
2027                                 || entity->kind == ENTITY_PARAMETER);
2028                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2029                 int value_number;
2030                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2031                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2032                         value_number = entity->variable.v.value_number;
2033                         assert(addr == NULL);
2034                         type_t  *type = skip_typeref(expression->base.type);
2035                         ir_mode *mode = get_ir_mode_storage(type);
2036                         ir_node *res  = get_value(value_number, mode);
2037                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2038                 }
2039         }
2040
2041         assert(addr != NULL);
2042         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2043
2044         ir_node *value;
2045         if (expression->kind == EXPR_SELECT &&
2046             expression->select.compound_entry->compound_member.bitfield) {
2047             construct_select_compound(&expression->select);
2048                 value = bitfield_extract_to_firm(&expression->select, addr);
2049         } else {
2050                 value = deref_address(dbgi, expression->base.type, addr);
2051         }
2052
2053         return value;
2054 }
2055
2056
2057 static ir_node *create_incdec(const unary_expression_t *expression)
2058 {
2059         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2060         const expression_t *value_expr = expression->value;
2061         ir_node            *addr       = expression_to_addr(value_expr);
2062         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2063
2064         type_t  *type = skip_typeref(expression->base.type);
2065         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2066
2067         ir_node *offset;
2068         if (is_type_pointer(type)) {
2069                 pointer_type_t *pointer_type = &type->pointer;
2070                 offset = get_type_size_node(pointer_type->points_to);
2071         } else {
2072                 assert(is_type_arithmetic(type));
2073                 offset = new_Const(get_mode_one(mode));
2074         }
2075
2076         ir_node *result;
2077         ir_node *store_value;
2078         switch(expression->base.kind) {
2079         case EXPR_UNARY_POSTFIX_INCREMENT:
2080                 result      = value;
2081                 store_value = new_d_Add(dbgi, value, offset, mode);
2082                 break;
2083         case EXPR_UNARY_POSTFIX_DECREMENT:
2084                 result      = value;
2085                 store_value = new_d_Sub(dbgi, value, offset, mode);
2086                 break;
2087         case EXPR_UNARY_PREFIX_INCREMENT:
2088                 result      = new_d_Add(dbgi, value, offset, mode);
2089                 store_value = result;
2090                 break;
2091         case EXPR_UNARY_PREFIX_DECREMENT:
2092                 result      = new_d_Sub(dbgi, value, offset, mode);
2093                 store_value = result;
2094                 break;
2095         default:
2096                 panic("no incdec expr in create_incdec");
2097         }
2098
2099         set_value_for_expression_addr(value_expr, store_value, addr);
2100
2101         return result;
2102 }
2103
2104 static bool is_local_variable(expression_t *expression)
2105 {
2106         if (expression->kind != EXPR_REFERENCE)
2107                 return false;
2108         reference_expression_t *ref_expr = &expression->reference;
2109         entity_t               *entity   = ref_expr->entity;
2110         if (entity->kind != ENTITY_VARIABLE)
2111                 return false;
2112         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2113         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2114 }
2115
2116 static ir_relation get_relation(const expression_kind_t kind)
2117 {
2118         switch(kind) {
2119         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2120         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2121         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2122         case EXPR_BINARY_ISLESS:
2123         case EXPR_BINARY_LESS:          return ir_relation_less;
2124         case EXPR_BINARY_ISLESSEQUAL:
2125         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2126         case EXPR_BINARY_ISGREATER:
2127         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2128         case EXPR_BINARY_ISGREATEREQUAL:
2129         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2130         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2131
2132         default:
2133                 break;
2134         }
2135         panic("trying to get ir_relation from non-comparison binexpr type");
2136 }
2137
2138 /**
2139  * Handle the assume optimizer hint: check if a Confirm
2140  * node can be created.
2141  *
2142  * @param dbi    debug info
2143  * @param expr   the IL assume expression
2144  *
2145  * we support here only some simple cases:
2146  *  - var rel const
2147  *  - const rel val
2148  *  - var rel var
2149  */
2150 static ir_node *handle_assume_compare(dbg_info *dbi,
2151                                       const binary_expression_t *expression)
2152 {
2153         expression_t *op1 = expression->left;
2154         expression_t *op2 = expression->right;
2155         entity_t     *var2, *var = NULL;
2156         ir_node      *res      = NULL;
2157         ir_relation   relation = get_relation(expression->base.kind);
2158
2159         if (is_local_variable(op1) && is_local_variable(op2)) {
2160                 var  = op1->reference.entity;
2161             var2 = op2->reference.entity;
2162
2163                 type_t  *const type = skip_typeref(var->declaration.type);
2164                 ir_mode *const mode = get_ir_mode_storage(type);
2165
2166                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2167                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2168
2169                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2170                 set_value(var2->variable.v.value_number, res);
2171
2172                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2173                 set_value(var->variable.v.value_number, res);
2174
2175                 return res;
2176         }
2177
2178         expression_t *con = NULL;
2179         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2180                 var = op1->reference.entity;
2181                 con = op2;
2182         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2183                 relation = get_inversed_relation(relation);
2184                 var = op2->reference.entity;
2185                 con = op1;
2186         }
2187
2188         if (var != NULL) {
2189                 type_t  *const type = skip_typeref(var->declaration.type);
2190                 ir_mode *const mode = get_ir_mode_storage(type);
2191
2192                 res = get_value(var->variable.v.value_number, mode);
2193                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2194                 set_value(var->variable.v.value_number, res);
2195         }
2196         return res;
2197 }
2198
2199 /**
2200  * Handle the assume optimizer hint.
2201  *
2202  * @param dbi    debug info
2203  * @param expr   the IL assume expression
2204  */
2205 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2206 {
2207         switch(expression->kind) {
2208         case EXPR_BINARY_EQUAL:
2209         case EXPR_BINARY_NOTEQUAL:
2210         case EXPR_BINARY_LESS:
2211         case EXPR_BINARY_LESSEQUAL:
2212         case EXPR_BINARY_GREATER:
2213         case EXPR_BINARY_GREATEREQUAL:
2214                 return handle_assume_compare(dbi, &expression->binary);
2215         default:
2216                 return NULL;
2217         }
2218 }
2219
2220 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2221                             type_t *from_type, type_t *type)
2222 {
2223         type = skip_typeref(type);
2224         if (is_type_void(type)) {
2225                 /* make sure firm type is constructed */
2226                 (void) get_ir_type(type);
2227                 return NULL;
2228         }
2229         if (!is_type_scalar(type)) {
2230                 /* make sure firm type is constructed */
2231                 (void) get_ir_type(type);
2232                 return value_node;
2233         }
2234
2235         from_type     = skip_typeref(from_type);
2236         ir_mode *mode = get_ir_mode_storage(type);
2237         /* check for conversion from / to __based types */
2238         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2239                 const variable_t *from_var = from_type->pointer.base_variable;
2240                 const variable_t *to_var   = type->pointer.base_variable;
2241                 if (from_var != to_var) {
2242                         if (from_var != NULL) {
2243                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2244                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2245                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2246                         }
2247                         if (to_var != NULL) {
2248                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2249                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2250                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2251                         }
2252                 }
2253         }
2254
2255         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2256                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2257                  * convert to mode_b so we only get a 0/1 value */
2258                 value_node = create_conv(dbgi, value_node, mode_b);
2259         }
2260
2261         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2262         ir_node *node       = create_conv(dbgi, value_node, mode);
2263         node                = create_conv(dbgi, node, mode_arith);
2264
2265         return node;
2266 }
2267
2268 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2269 {
2270         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2271         type_t   *type = skip_typeref(expression->base.type);
2272
2273         const expression_t *value = expression->value;
2274
2275         switch(expression->base.kind) {
2276         case EXPR_UNARY_TAKE_ADDRESS:
2277                 return expression_to_addr(value);
2278
2279         case EXPR_UNARY_NEGATE: {
2280                 ir_node *value_node = expression_to_firm(value);
2281                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2282                 return new_d_Minus(dbgi, value_node, mode);
2283         }
2284         case EXPR_UNARY_PLUS:
2285                 return expression_to_firm(value);
2286         case EXPR_UNARY_BITWISE_NEGATE: {
2287                 ir_node *value_node = expression_to_firm(value);
2288                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2289                 return new_d_Not(dbgi, value_node, mode);
2290         }
2291         case EXPR_UNARY_NOT: {
2292                 ir_node *value_node = _expression_to_firm(value);
2293                 value_node          = create_conv(dbgi, value_node, mode_b);
2294                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2295                 return res;
2296         }
2297         case EXPR_UNARY_DEREFERENCE: {
2298                 ir_node *value_node = expression_to_firm(value);
2299                 type_t  *value_type = skip_typeref(value->base.type);
2300                 assert(is_type_pointer(value_type));
2301
2302                 /* check for __based */
2303                 const variable_t *const base_var = value_type->pointer.base_variable;
2304                 if (base_var != NULL) {
2305                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2306                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2307                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2308                 }
2309                 type_t  *points_to  = value_type->pointer.points_to;
2310                 return deref_address(dbgi, points_to, value_node);
2311         }
2312         case EXPR_UNARY_POSTFIX_INCREMENT:
2313         case EXPR_UNARY_POSTFIX_DECREMENT:
2314         case EXPR_UNARY_PREFIX_INCREMENT:
2315         case EXPR_UNARY_PREFIX_DECREMENT:
2316                 return create_incdec(expression);
2317         case EXPR_UNARY_CAST: {
2318                 ir_node *value_node = expression_to_firm(value);
2319                 type_t  *from_type  = value->base.type;
2320                 return create_cast(dbgi, value_node, from_type, type);
2321         }
2322         case EXPR_UNARY_ASSUME:
2323                 return handle_assume(dbgi, value);
2324
2325         default:
2326                 break;
2327         }
2328         panic("invalid UNEXPR type found");
2329 }
2330
2331 /**
2332  * produces a 0/1 depending of the value of a mode_b node
2333  */
2334 static ir_node *produce_condition_result(const expression_t *expression,
2335                                          ir_mode *mode, dbg_info *dbgi)
2336 {
2337         ir_node *const one_block  = new_immBlock();
2338         ir_node *const zero_block = new_immBlock();
2339         create_condition_evaluation(expression, one_block, zero_block);
2340         mature_immBlock(one_block);
2341         mature_immBlock(zero_block);
2342
2343         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2344         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2345         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2346         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2347         set_cur_block(block);
2348
2349         ir_node *const one   = new_Const(get_mode_one(mode));
2350         ir_node *const zero  = new_Const(get_mode_null(mode));
2351         ir_node *const in[2] = { one, zero };
2352         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2353
2354         return val;
2355 }
2356
2357 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2358                 ir_node *value, type_t *type)
2359 {
2360         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2361         assert(is_type_pointer(type));
2362         pointer_type_t *const pointer_type = &type->pointer;
2363         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2364         ir_node        *      elem_size    = get_type_size_node(points_to);
2365         elem_size                          = create_conv(dbgi, elem_size, mode);
2366         value                              = create_conv(dbgi, value,     mode);
2367         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2368         return mul;
2369 }
2370
2371 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2372                           ir_node *left, ir_node *right)
2373 {
2374         ir_mode  *mode;
2375         type_t   *type_left  = skip_typeref(expression->left->base.type);
2376         type_t   *type_right = skip_typeref(expression->right->base.type);
2377
2378         expression_kind_t kind = expression->base.kind;
2379
2380         switch (kind) {
2381         case EXPR_BINARY_SHIFTLEFT:
2382         case EXPR_BINARY_SHIFTRIGHT:
2383         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2384         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2385                 mode  = get_ir_mode_arithmetic(expression->base.type);
2386                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2387                 break;
2388
2389         case EXPR_BINARY_SUB:
2390                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2391                         const pointer_type_t *const ptr_type = &type_left->pointer;
2392
2393                         mode = get_ir_mode_arithmetic(expression->base.type);
2394                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2395                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2396                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2397                         ir_node *const no_mem    = new_NoMem();
2398                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2399                                                                                                    mode, op_pin_state_floats);
2400                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2401                 }
2402                 /* fallthrough */
2403         case EXPR_BINARY_SUB_ASSIGN:
2404                 if (is_type_pointer(type_left)) {
2405                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2406                         mode  = get_ir_mode_arithmetic(type_left);
2407                         break;
2408                 }
2409                 goto normal_node;
2410
2411         case EXPR_BINARY_ADD:
2412         case EXPR_BINARY_ADD_ASSIGN:
2413                 if (is_type_pointer(type_left)) {
2414                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2415                         mode  = get_ir_mode_arithmetic(type_left);
2416                         break;
2417                 } else if (is_type_pointer(type_right)) {
2418                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2419                         mode  = get_ir_mode_arithmetic(type_right);
2420                         break;
2421                 }
2422                 goto normal_node;
2423
2424         default:
2425 normal_node:
2426                 mode = get_ir_mode_arithmetic(type_right);
2427                 left = create_conv(dbgi, left, mode);
2428                 break;
2429         }
2430
2431         switch (kind) {
2432         case EXPR_BINARY_ADD_ASSIGN:
2433         case EXPR_BINARY_ADD:
2434                 return new_d_Add(dbgi, left, right, mode);
2435         case EXPR_BINARY_SUB_ASSIGN:
2436         case EXPR_BINARY_SUB:
2437                 return new_d_Sub(dbgi, left, right, mode);
2438         case EXPR_BINARY_MUL_ASSIGN:
2439         case EXPR_BINARY_MUL:
2440                 return new_d_Mul(dbgi, left, right, mode);
2441         case EXPR_BINARY_BITWISE_AND:
2442         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2443                 return new_d_And(dbgi, left, right, mode);
2444         case EXPR_BINARY_BITWISE_OR:
2445         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2446                 return new_d_Or(dbgi, left, right, mode);
2447         case EXPR_BINARY_BITWISE_XOR:
2448         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2449                 return new_d_Eor(dbgi, left, right, mode);
2450         case EXPR_BINARY_SHIFTLEFT:
2451         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2452                 return new_d_Shl(dbgi, left, right, mode);
2453         case EXPR_BINARY_SHIFTRIGHT:
2454         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2455                 if (mode_is_signed(mode)) {
2456                         return new_d_Shrs(dbgi, left, right, mode);
2457                 } else {
2458                         return new_d_Shr(dbgi, left, right, mode);
2459                 }
2460         case EXPR_BINARY_DIV:
2461         case EXPR_BINARY_DIV_ASSIGN: {
2462                 ir_node *pin = new_Pin(new_NoMem());
2463                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2464                                          op_pin_state_floats);
2465                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2466                 return res;
2467         }
2468         case EXPR_BINARY_MOD:
2469         case EXPR_BINARY_MOD_ASSIGN: {
2470                 ir_node *pin = new_Pin(new_NoMem());
2471                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2472                                          op_pin_state_floats);
2473                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2474                 return res;
2475         }
2476         default:
2477                 panic("unexpected expression kind");
2478         }
2479 }
2480
2481 static ir_node *create_lazy_op(const binary_expression_t *expression)
2482 {
2483         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2484         type_t   *type = skip_typeref(expression->base.type);
2485         ir_mode  *mode = get_ir_mode_arithmetic(type);
2486
2487         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2488                 bool val = fold_constant_to_bool(expression->left);
2489                 expression_kind_t ekind = expression->base.kind;
2490                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2491                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2492                         if (!val) {
2493                                 return new_Const(get_mode_null(mode));
2494                         }
2495                 } else {
2496                         if (val) {
2497                                 return new_Const(get_mode_one(mode));
2498                         }
2499                 }
2500
2501                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2502                         bool valr = fold_constant_to_bool(expression->right);
2503                         return create_Const_from_bool(mode, valr);
2504                 }
2505
2506                 return produce_condition_result(expression->right, mode, dbgi);
2507         }
2508
2509         return produce_condition_result((const expression_t*) expression, mode,
2510                                         dbgi);
2511 }
2512
2513 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2514                                             ir_node *right, ir_mode *mode);
2515
2516 static ir_node *create_assign_binop(const binary_expression_t *expression)
2517 {
2518         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2519         const expression_t *left_expr = expression->left;
2520         type_t             *type      = skip_typeref(left_expr->base.type);
2521         ir_node            *right     = expression_to_firm(expression->right);
2522         ir_node            *left_addr = expression_to_addr(left_expr);
2523         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2524         ir_node            *result    = create_op(dbgi, expression, left, right);
2525
2526         result = create_cast(dbgi, result, expression->right->base.type, type);
2527
2528         result = set_value_for_expression_addr(left_expr, result, left_addr);
2529
2530         if (!is_type_compound(type)) {
2531                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2532                 result = create_conv(dbgi, result, mode_arithmetic);
2533         }
2534         return result;
2535 }
2536
2537 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2538 {
2539         expression_kind_t kind = expression->base.kind;
2540
2541         switch(kind) {
2542         case EXPR_BINARY_EQUAL:
2543         case EXPR_BINARY_NOTEQUAL:
2544         case EXPR_BINARY_LESS:
2545         case EXPR_BINARY_LESSEQUAL:
2546         case EXPR_BINARY_GREATER:
2547         case EXPR_BINARY_GREATEREQUAL:
2548         case EXPR_BINARY_ISGREATER:
2549         case EXPR_BINARY_ISGREATEREQUAL:
2550         case EXPR_BINARY_ISLESS:
2551         case EXPR_BINARY_ISLESSEQUAL:
2552         case EXPR_BINARY_ISLESSGREATER:
2553         case EXPR_BINARY_ISUNORDERED: {
2554                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2555                 ir_node    *left     = expression_to_firm(expression->left);
2556                 ir_node    *right    = expression_to_firm(expression->right);
2557                 ir_relation relation = get_relation(kind);
2558                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2559                 return cmp;
2560         }
2561         case EXPR_BINARY_ASSIGN: {
2562                 ir_node *addr  = expression_to_addr(expression->left);
2563                 ir_node *right = expression_to_firm(expression->right);
2564                 ir_node *res
2565                         = set_value_for_expression_addr(expression->left, right, addr);
2566
2567                 type_t  *type            = skip_typeref(expression->base.type);
2568                 if (!is_type_compound(type)) {
2569                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570                         res                      = create_conv(NULL, res, mode_arithmetic);
2571                 }
2572                 return res;
2573         }
2574         case EXPR_BINARY_ADD:
2575         case EXPR_BINARY_SUB:
2576         case EXPR_BINARY_MUL:
2577         case EXPR_BINARY_DIV:
2578         case EXPR_BINARY_MOD:
2579         case EXPR_BINARY_BITWISE_AND:
2580         case EXPR_BINARY_BITWISE_OR:
2581         case EXPR_BINARY_BITWISE_XOR:
2582         case EXPR_BINARY_SHIFTLEFT:
2583         case EXPR_BINARY_SHIFTRIGHT:
2584         {
2585                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2586                 ir_node  *left  = expression_to_firm(expression->left);
2587                 ir_node  *right = expression_to_firm(expression->right);
2588                 return create_op(dbgi, expression, left, right);
2589         }
2590         case EXPR_BINARY_LOGICAL_AND:
2591         case EXPR_BINARY_LOGICAL_OR:
2592                 return create_lazy_op(expression);
2593         case EXPR_BINARY_COMMA:
2594                 /* create side effects of left side */
2595                 (void) expression_to_firm(expression->left);
2596                 return _expression_to_firm(expression->right);
2597
2598         case EXPR_BINARY_ADD_ASSIGN:
2599         case EXPR_BINARY_SUB_ASSIGN:
2600         case EXPR_BINARY_MUL_ASSIGN:
2601         case EXPR_BINARY_MOD_ASSIGN:
2602         case EXPR_BINARY_DIV_ASSIGN:
2603         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2604         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2605         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2606         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2607         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2608                 return create_assign_binop(expression);
2609         default:
2610                 panic("invalid binexpr type");
2611         }
2612 }
2613
2614 static ir_node *array_access_addr(const array_access_expression_t *expression)
2615 {
2616         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2617         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2618         ir_node  *offset      = expression_to_firm(expression->index);
2619         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2620         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2621         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2622
2623         return result;
2624 }
2625
2626 static ir_node *array_access_to_firm(
2627                 const array_access_expression_t *expression)
2628 {
2629         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2630         ir_node  *addr   = array_access_addr(expression);
2631         type_t   *type   = revert_automatic_type_conversion(
2632                         (const expression_t*) expression);
2633         type             = skip_typeref(type);
2634
2635         return deref_address(dbgi, type, addr);
2636 }
2637
2638 static long get_offsetof_offset(const offsetof_expression_t *expression)
2639 {
2640         type_t *orig_type = expression->type;
2641         long    offset    = 0;
2642
2643         designator_t *designator = expression->designator;
2644         for ( ; designator != NULL; designator = designator->next) {
2645                 type_t *type = skip_typeref(orig_type);
2646                 /* be sure the type is constructed */
2647                 (void) get_ir_type(type);
2648
2649                 if (designator->symbol != NULL) {
2650                         assert(is_type_compound(type));
2651                         symbol_t *symbol = designator->symbol;
2652
2653                         compound_t *compound = type->compound.compound;
2654                         entity_t   *iter     = compound->members.entities;
2655                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2656
2657                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2658                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2659                         offset += get_entity_offset(iter->compound_member.entity);
2660
2661                         orig_type = iter->declaration.type;
2662                 } else {
2663                         expression_t *array_index = designator->array_index;
2664                         assert(designator->array_index != NULL);
2665                         assert(is_type_array(type));
2666
2667                         long index         = fold_constant_to_int(array_index);
2668                         ir_type *arr_type  = get_ir_type(type);
2669                         ir_type *elem_type = get_array_element_type(arr_type);
2670                         long     elem_size = get_type_size_bytes(elem_type);
2671
2672                         offset += index * elem_size;
2673
2674                         orig_type = type->array.element_type;
2675                 }
2676         }
2677
2678         return offset;
2679 }
2680
2681 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2682 {
2683         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2684         long       offset = get_offsetof_offset(expression);
2685         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2686         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2687
2688         return new_d_Const(dbgi, tv);
2689 }
2690
2691 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2692                                      ir_entity *entity, type_t *type);
2693 static ir_initializer_t *create_ir_initializer(
2694                 const initializer_t *initializer, type_t *type);
2695
2696 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2697                                             initializer_t *initializer,
2698                                             type_t *type)
2699 {
2700         /* create the ir_initializer */
2701         ir_graph *const old_current_ir_graph = current_ir_graph;
2702         current_ir_graph = get_const_code_irg();
2703
2704         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2705
2706         assert(current_ir_graph == get_const_code_irg());
2707         current_ir_graph = old_current_ir_graph;
2708
2709         ident     *const id          = id_unique("initializer.%u");
2710         ir_type   *const irtype      = get_ir_type(type);
2711         ir_type   *const global_type = get_glob_type();
2712         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2713         set_entity_ld_ident(entity, id);
2714         set_entity_visibility(entity, ir_visibility_private);
2715         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2716         set_entity_initializer(entity, irinitializer);
2717         return entity;
2718 }
2719
2720 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2721 {
2722         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2723         type_t        *type        = expression->type;
2724         initializer_t *initializer = expression->initializer;
2725
2726         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2727                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2728                 return create_symconst(dbgi, entity);
2729         } else {
2730                 /* create an entity on the stack */
2731                 ident   *const id     = id_unique("CompLit.%u");
2732                 ir_type *const irtype = get_ir_type(type);
2733                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2734
2735                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2736                 set_entity_ld_ident(entity, id);
2737
2738                 /* create initialisation code */
2739                 create_local_initializer(initializer, dbgi, entity, type);
2740
2741                 /* create a sel for the compound literal address */
2742                 ir_node *frame = get_irg_frame(current_ir_graph);
2743                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2744                 return sel;
2745         }
2746 }
2747
2748 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2749 {
2750         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2751         type_t   *const type = expr->type;
2752         ir_node  *const addr = compound_literal_addr(expr);
2753         return deref_address(dbgi, type, addr);
2754 }
2755
2756 /**
2757  * Transform a sizeof expression into Firm code.
2758  */
2759 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2760 {
2761         type_t *const type = skip_typeref(expression->type);
2762         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2763         if (is_type_array(type) && type->array.is_vla
2764                         && expression->tp_expression != NULL) {
2765                 expression_to_firm(expression->tp_expression);
2766         }
2767
2768         return get_type_size_node(type);
2769 }
2770
2771 static entity_t *get_expression_entity(const expression_t *expression)
2772 {
2773         if (expression->kind != EXPR_REFERENCE)
2774                 return NULL;
2775
2776         return expression->reference.entity;
2777 }
2778
2779 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2780 {
2781         switch(entity->kind) {
2782         case DECLARATION_KIND_CASES:
2783                 return entity->declaration.alignment;
2784         case ENTITY_STRUCT:
2785         case ENTITY_UNION:
2786                 return entity->compound.alignment;
2787         case ENTITY_TYPEDEF:
2788                 return entity->typedefe.alignment;
2789         default:
2790                 break;
2791         }
2792         return 0;
2793 }
2794
2795 /**
2796  * Transform an alignof expression into Firm code.
2797  */
2798 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2799 {
2800         unsigned alignment = 0;
2801
2802         const expression_t *tp_expression = expression->tp_expression;
2803         if (tp_expression != NULL) {
2804                 entity_t *entity = get_expression_entity(tp_expression);
2805                 if (entity != NULL) {
2806                         alignment = get_cparser_entity_alignment(entity);
2807                 }
2808         }
2809
2810         if (alignment == 0) {
2811                 type_t *type = expression->type;
2812                 alignment = get_type_alignment(type);
2813         }
2814
2815         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2816         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2817         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2818         return new_d_Const(dbgi, tv);
2819 }
2820
2821 static void init_ir_types(void);
2822
2823 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2824 {
2825         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2826
2827         bool constant_folding_old = constant_folding;
2828         constant_folding = true;
2829         int old_optimize         = get_optimize();
2830         int old_constant_folding = get_opt_constant_folding();
2831         set_optimize(1);
2832         set_opt_constant_folding(1);
2833
2834         init_ir_types();
2835
2836         ir_graph *old_current_ir_graph = current_ir_graph;
2837         current_ir_graph = get_const_code_irg();
2838
2839         ir_node *const cnst = _expression_to_firm(expression);
2840
2841         current_ir_graph = old_current_ir_graph;
2842         set_optimize(old_optimize);
2843         set_opt_constant_folding(old_constant_folding);
2844
2845         if (!is_Const(cnst)) {
2846                 panic("couldn't fold constant");
2847         }
2848
2849         constant_folding = constant_folding_old;
2850
2851         ir_tarval *const tv   = get_Const_tarval(cnst);
2852         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2853         return tarval_convert_to(tv, mode);
2854 }
2855
2856 /* this function is only used in parser.c, but it relies on libfirm functionality */
2857 bool constant_is_negative(const expression_t *expression)
2858 {
2859         ir_tarval *tv = fold_constant_to_tarval(expression);
2860         return tarval_is_negative(tv);
2861 }
2862
2863 long fold_constant_to_int(const expression_t *expression)
2864 {
2865         ir_tarval *tv = fold_constant_to_tarval(expression);
2866         if (!tarval_is_long(tv)) {
2867                 panic("result of constant folding is not integer");
2868         }
2869
2870         return get_tarval_long(tv);
2871 }
2872
2873 bool fold_constant_to_bool(const expression_t *expression)
2874 {
2875         ir_tarval *tv = fold_constant_to_tarval(expression);
2876         return !tarval_is_null(tv);
2877 }
2878
2879 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2880 {
2881         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2882
2883         /* first try to fold a constant condition */
2884         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2885                 bool val = fold_constant_to_bool(expression->condition);
2886                 if (val) {
2887                         expression_t *true_expression = expression->true_expression;
2888                         if (true_expression == NULL)
2889                                 true_expression = expression->condition;
2890                         return expression_to_firm(true_expression);
2891                 } else {
2892                         return expression_to_firm(expression->false_expression);
2893                 }
2894         }
2895
2896         ir_node *const true_block  = new_immBlock();
2897         ir_node *const false_block = new_immBlock();
2898         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
2899         mature_immBlock(true_block);
2900         mature_immBlock(false_block);
2901
2902         set_cur_block(true_block);
2903         ir_node *true_val;
2904         if (expression->true_expression != NULL) {
2905                 true_val = expression_to_firm(expression->true_expression);
2906         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2907                 true_val = cond_expr;
2908         } else {
2909                 /* Condition ended with a short circuit (&&, ||, !) operation or a
2910                  * comparison.  Generate a "1" as value for the true branch. */
2911                 true_val = new_Const(get_mode_one(mode_Is));
2912         }
2913         ir_node *const true_jmp = new_d_Jmp(dbgi);
2914
2915         set_cur_block(false_block);
2916         ir_node *const false_val = expression_to_firm(expression->false_expression);
2917         ir_node *const false_jmp = new_d_Jmp(dbgi);
2918
2919         /* create the common block */
2920         ir_node *const in_cf[2] = { true_jmp, false_jmp };
2921         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2922         set_cur_block(block);
2923
2924         /* TODO improve static semantics, so either both or no values are NULL */
2925         if (true_val == NULL || false_val == NULL)
2926                 return NULL;
2927
2928         ir_node *const in[2] = { true_val, false_val };
2929         type_t  *const type  = skip_typeref(expression->base.type);
2930         ir_mode *const mode  = get_ir_mode_arithmetic(type);
2931         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2932
2933         return val;
2934 }
2935
2936 /**
2937  * Returns an IR-node representing the address of a field.
2938  */
2939 static ir_node *select_addr(const select_expression_t *expression)
2940 {
2941         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2942
2943         construct_select_compound(expression);
2944
2945         ir_node *compound_addr = expression_to_firm(expression->compound);
2946
2947         entity_t *entry = expression->compound_entry;
2948         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2949         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2950
2951         if (constant_folding) {
2952                 ir_mode *mode      = get_irn_mode(compound_addr);
2953                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2954                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2955                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2956         } else {
2957                 ir_entity *irentity = entry->compound_member.entity;
2958                 assert(irentity != NULL);
2959                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2960         }
2961 }
2962
2963 static ir_node *select_to_firm(const select_expression_t *expression)
2964 {
2965         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2966         ir_node  *addr = select_addr(expression);
2967         type_t   *type = revert_automatic_type_conversion(
2968                         (const expression_t*) expression);
2969         type           = skip_typeref(type);
2970
2971         entity_t *entry = expression->compound_entry;
2972         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2973
2974         if (entry->compound_member.bitfield) {
2975                 return bitfield_extract_to_firm(expression, addr);
2976         }
2977
2978         return deref_address(dbgi, type, addr);
2979 }
2980
2981 /* Values returned by __builtin_classify_type. */
2982 typedef enum gcc_type_class
2983 {
2984         no_type_class = -1,
2985         void_type_class,
2986         integer_type_class,
2987         char_type_class,
2988         enumeral_type_class,
2989         boolean_type_class,
2990         pointer_type_class,
2991         reference_type_class,
2992         offset_type_class,
2993         real_type_class,
2994         complex_type_class,
2995         function_type_class,
2996         method_type_class,
2997         record_type_class,
2998         union_type_class,
2999         array_type_class,
3000         string_type_class,
3001         set_type_class,
3002         file_type_class,
3003         lang_type_class
3004 } gcc_type_class;
3005
3006 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3007 {
3008         type_t *type = expr->type_expression->base.type;
3009
3010         /* FIXME gcc returns different values depending on whether compiling C or C++
3011          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3012         gcc_type_class tc;
3013         for (;;) {
3014                 type = skip_typeref(type);
3015                 switch (type->kind) {
3016                         case TYPE_ATOMIC: {
3017                                 const atomic_type_t *const atomic_type = &type->atomic;
3018                                 switch (atomic_type->akind) {
3019                                         /* gcc cannot do that */
3020                                         case ATOMIC_TYPE_VOID:
3021                                                 tc = void_type_class;
3022                                                 goto make_const;
3023
3024                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3025                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3026                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3027                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3028                                         case ATOMIC_TYPE_SHORT:
3029                                         case ATOMIC_TYPE_USHORT:
3030                                         case ATOMIC_TYPE_INT:
3031                                         case ATOMIC_TYPE_UINT:
3032                                         case ATOMIC_TYPE_LONG:
3033                                         case ATOMIC_TYPE_ULONG:
3034                                         case ATOMIC_TYPE_LONGLONG:
3035                                         case ATOMIC_TYPE_ULONGLONG:
3036                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3037                                                 tc = integer_type_class;
3038                                                 goto make_const;
3039
3040                                         case ATOMIC_TYPE_FLOAT:
3041                                         case ATOMIC_TYPE_DOUBLE:
3042                                         case ATOMIC_TYPE_LONG_DOUBLE:
3043                                                 tc = real_type_class;
3044                                                 goto make_const;
3045                                 }
3046                                 panic("Unexpected atomic type in classify_type_to_firm().");
3047                         }
3048
3049                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3050                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3051                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3052                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3053                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3054                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3055                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3056
3057                         /* gcc handles this as integer */
3058                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3059
3060                         /* gcc classifies the referenced type */
3061                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3062
3063                         /* typedef/typeof should be skipped already */
3064                         case TYPE_TYPEDEF:
3065                         case TYPE_TYPEOF:
3066                         case TYPE_ERROR:
3067                                 break;
3068                 }
3069                 panic("unexpected TYPE classify_type_to_firm().");
3070         }
3071
3072 make_const:;
3073         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3074         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3075         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3076         return new_d_Const(dbgi, tv);
3077 }
3078
3079 static ir_node *function_name_to_firm(
3080                 const funcname_expression_t *const expr)
3081 {
3082         switch(expr->kind) {
3083         case FUNCNAME_FUNCTION:
3084         case FUNCNAME_PRETTY_FUNCTION:
3085         case FUNCNAME_FUNCDNAME:
3086                 if (current_function_name == NULL) {
3087                         source_position_t const *const src_pos = &expr->base.source_position;
3088                         char              const *const name    = current_function_entity->base.symbol->string;
3089                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3090                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3091                 }
3092                 return current_function_name;
3093         case FUNCNAME_FUNCSIG:
3094                 if (current_funcsig == NULL) {
3095                         source_position_t const *const src_pos = &expr->base.source_position;
3096                         ir_entity               *const ent     = get_irg_entity(current_ir_graph);
3097                         char              const *const name    = get_entity_ld_name(ent);
3098                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3099                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3100                 }
3101                 return current_funcsig;
3102         }
3103         panic("Unsupported function name");
3104 }
3105
3106 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3107 {
3108         statement_t *statement = expr->statement;
3109
3110         assert(statement->kind == STATEMENT_COMPOUND);
3111         return compound_statement_to_firm(&statement->compound);
3112 }
3113
3114 static ir_node *va_start_expression_to_firm(
3115         const va_start_expression_t *const expr)
3116 {
3117         ir_entity *param_ent = current_vararg_entity;
3118         if (param_ent == NULL) {
3119                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3120                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3121                 ir_type *const param_type  = get_unknown_type();
3122                 param_ent = new_parameter_entity(frame_type, n, param_type);
3123                 current_vararg_entity = param_ent;
3124         }
3125
3126         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3127         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3128         ir_node  *const no_mem  = new_NoMem();
3129         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3130
3131         set_value_for_expression(expr->ap, arg_sel);
3132
3133         return NULL;
3134 }
3135
3136 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3137 {
3138         type_t       *const type    = expr->base.type;
3139         expression_t *const ap_expr = expr->ap;
3140         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3141         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3142         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3143         ir_node      *const res     = deref_address(dbgi, type, ap);
3144
3145         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3146         ir_mode      *const mode    = get_irn_mode(cnst);
3147         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3148         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3149         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3150         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3151         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3152
3153         set_value_for_expression_addr(ap_expr, add, ap_addr);
3154
3155         return res;
3156 }
3157
3158 /**
3159  * Generate Firm for a va_copy expression.
3160  */
3161 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3162 {
3163         ir_node *const src = expression_to_firm(expr->src);
3164         set_value_for_expression(expr->dst, src);
3165         return NULL;
3166 }
3167
3168 static ir_node *dereference_addr(const unary_expression_t *const expression)
3169 {
3170         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3171         return expression_to_firm(expression->value);
3172 }
3173
3174 /**
3175  * Returns a IR-node representing an lvalue of the given expression.
3176  */
3177 static ir_node *expression_to_addr(const expression_t *expression)
3178 {
3179         switch(expression->kind) {
3180         case EXPR_ARRAY_ACCESS:
3181                 return array_access_addr(&expression->array_access);
3182         case EXPR_CALL:
3183                 return call_expression_to_firm(&expression->call);
3184         case EXPR_COMPOUND_LITERAL:
3185                 return compound_literal_addr(&expression->compound_literal);
3186         case EXPR_REFERENCE:
3187                 return reference_addr(&expression->reference);
3188         case EXPR_SELECT:
3189                 return select_addr(&expression->select);
3190         case EXPR_UNARY_DEREFERENCE:
3191                 return dereference_addr(&expression->unary);
3192         default:
3193                 break;
3194         }
3195         panic("trying to get address of non-lvalue");
3196 }
3197
3198 static ir_node *builtin_constant_to_firm(
3199                 const builtin_constant_expression_t *expression)
3200 {
3201         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3202         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3203         return create_Const_from_bool(mode, v);
3204 }
3205
3206 static ir_node *builtin_types_compatible_to_firm(
3207                 const builtin_types_compatible_expression_t *expression)
3208 {
3209         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3210         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3211         bool     const value = types_compatible(left, right);
3212         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3213         return create_Const_from_bool(mode, value);
3214 }
3215
3216 static ir_node *get_label_block(label_t *label)
3217 {
3218         if (label->block != NULL)
3219                 return label->block;
3220
3221         /* beware: might be called from create initializer with current_ir_graph
3222          * set to const_code_irg. */
3223         ir_graph *rem    = current_ir_graph;
3224         current_ir_graph = current_function;
3225
3226         ir_node *block = new_immBlock();
3227
3228         label->block = block;
3229
3230         ARR_APP1(label_t *, all_labels, label);
3231
3232         current_ir_graph = rem;
3233         return block;
3234 }
3235
3236 /**
3237  * Pointer to a label.  This is used for the
3238  * GNU address-of-label extension.
3239  */
3240 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3241 {
3242         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3243         ir_node   *block  = get_label_block(label->label);
3244         ir_entity *entity = create_Block_entity(block);
3245
3246         symconst_symbol value;
3247         value.entity_p = entity;
3248         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3249 }
3250
3251 /**
3252  * creates firm nodes for an expression. The difference between this function
3253  * and expression_to_firm is, that this version might produce mode_b nodes
3254  * instead of mode_Is.
3255  */
3256 static ir_node *_expression_to_firm(expression_t const *const expr)
3257 {
3258 #ifndef NDEBUG
3259         if (!constant_folding) {
3260                 assert(!expr->base.transformed);
3261                 ((expression_t*)expr)->base.transformed = true;
3262         }
3263 #endif
3264
3265         switch (expr->kind) {
3266         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3267         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3268         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3269         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3270         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3271         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3272         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3273         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3274         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3275         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3276         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3277         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3278         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3279         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3280         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3281         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3282         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3283         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3284         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3285         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3286         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3287         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3288         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3289
3290         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3291
3292         case EXPR_ERROR: break;
3293         }
3294         panic("invalid expression found");
3295 }
3296
3297 /**
3298  * Check if a given expression is a GNU __builtin_expect() call.
3299  */
3300 static bool is_builtin_expect(const expression_t *expression)
3301 {
3302         if (expression->kind != EXPR_CALL)
3303                 return false;
3304
3305         expression_t *function = expression->call.function;
3306         if (function->kind != EXPR_REFERENCE)
3307                 return false;
3308         reference_expression_t *ref = &function->reference;
3309         if (ref->entity->kind         != ENTITY_FUNCTION ||
3310             ref->entity->function.btk != BUILTIN_EXPECT)
3311                 return false;
3312
3313         return true;
3314 }
3315
3316 static bool produces_mode_b(const expression_t *expression)
3317 {
3318         switch (expression->kind) {
3319         case EXPR_BINARY_EQUAL:
3320         case EXPR_BINARY_NOTEQUAL:
3321         case EXPR_BINARY_LESS:
3322         case EXPR_BINARY_LESSEQUAL:
3323         case EXPR_BINARY_GREATER:
3324         case EXPR_BINARY_GREATEREQUAL:
3325         case EXPR_BINARY_ISGREATER:
3326         case EXPR_BINARY_ISGREATEREQUAL:
3327         case EXPR_BINARY_ISLESS:
3328         case EXPR_BINARY_ISLESSEQUAL:
3329         case EXPR_BINARY_ISLESSGREATER:
3330         case EXPR_BINARY_ISUNORDERED:
3331         case EXPR_UNARY_NOT:
3332                 return true;
3333
3334         case EXPR_CALL:
3335                 if (is_builtin_expect(expression)) {
3336                         expression_t *argument = expression->call.arguments->expression;
3337                         return produces_mode_b(argument);
3338                 }
3339                 return false;
3340         case EXPR_BINARY_COMMA:
3341                 return produces_mode_b(expression->binary.right);
3342
3343         default:
3344                 return false;
3345         }
3346 }
3347
3348 static ir_node *expression_to_firm(const expression_t *expression)
3349 {
3350         if (!produces_mode_b(expression)) {
3351                 ir_node *res = _expression_to_firm(expression);
3352                 assert(res == NULL || get_irn_mode(res) != mode_b);
3353                 return res;
3354         }
3355
3356         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3357                 return new_Const(fold_constant_to_tarval(expression));
3358         }
3359
3360         /* we have to produce a 0/1 from the mode_b expression */
3361         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3362         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3363         return produce_condition_result(expression, mode, dbgi);
3364 }
3365
3366 /**
3367  * create a short-circuit expression evaluation that tries to construct
3368  * efficient control flow structures for &&, || and ! expressions
3369  */
3370 static ir_node *create_condition_evaluation(const expression_t *expression,
3371                                             ir_node *true_block,
3372                                             ir_node *false_block)
3373 {
3374         switch(expression->kind) {
3375         case EXPR_UNARY_NOT: {
3376                 const unary_expression_t *unary_expression = &expression->unary;
3377                 create_condition_evaluation(unary_expression->value, false_block,
3378                                             true_block);
3379                 return NULL;
3380         }
3381         case EXPR_BINARY_LOGICAL_AND: {
3382                 const binary_expression_t *binary_expression = &expression->binary;
3383
3384                 ir_node *extra_block = new_immBlock();
3385                 create_condition_evaluation(binary_expression->left, extra_block,
3386                                             false_block);
3387                 mature_immBlock(extra_block);
3388                 set_cur_block(extra_block);
3389                 create_condition_evaluation(binary_expression->right, true_block,
3390                                             false_block);
3391                 return NULL;
3392         }
3393         case EXPR_BINARY_LOGICAL_OR: {
3394                 const binary_expression_t *binary_expression = &expression->binary;
3395
3396                 ir_node *extra_block = new_immBlock();
3397                 create_condition_evaluation(binary_expression->left, true_block,
3398                                             extra_block);
3399                 mature_immBlock(extra_block);
3400                 set_cur_block(extra_block);
3401                 create_condition_evaluation(binary_expression->right, true_block,
3402                                             false_block);
3403                 return NULL;
3404         }
3405         default:
3406                 break;
3407         }
3408
3409         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3410         ir_node  *cond_expr  = _expression_to_firm(expression);
3411         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3412         ir_node  *cond       = new_d_Cond(dbgi, condition);
3413         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3414         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3415
3416         /* set branch prediction info based on __builtin_expect */
3417         if (is_builtin_expect(expression) && is_Cond(cond)) {
3418                 call_argument_t *argument = expression->call.arguments->next;
3419                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3420                         bool               const cnst = fold_constant_to_bool(argument->expression);
3421                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3422                         set_Cond_jmp_pred(cond, pred);
3423                 }
3424         }
3425
3426         add_immBlock_pred(true_block, true_proj);
3427         add_immBlock_pred(false_block, false_proj);
3428
3429         set_unreachable_now();
3430         return cond_expr;
3431 }
3432
3433 static void create_variable_entity(entity_t *variable,
3434                                    declaration_kind_t declaration_kind,
3435                                    ir_type *parent_type)
3436 {
3437         assert(variable->kind == ENTITY_VARIABLE);
3438         type_t    *type = skip_typeref(variable->declaration.type);
3439
3440         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3441         ir_type   *const irtype    = get_ir_type(type);
3442         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3443         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3444         unsigned         alignment = variable->declaration.alignment;
3445
3446         set_entity_alignment(irentity, alignment);
3447
3448         handle_decl_modifiers(irentity, variable);
3449
3450         variable->declaration.kind  = (unsigned char) declaration_kind;
3451         variable->variable.v.entity = irentity;
3452         set_entity_ld_ident(irentity, create_ld_ident(variable));
3453
3454         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3455                 set_entity_volatility(irentity, volatility_is_volatile);
3456         }
3457 }
3458
3459
3460 typedef struct type_path_entry_t type_path_entry_t;
3461 struct type_path_entry_t {
3462         type_t           *type;
3463         ir_initializer_t *initializer;
3464         size_t            index;
3465         entity_t         *compound_entry;
3466 };
3467
3468 typedef struct type_path_t type_path_t;
3469 struct type_path_t {
3470         type_path_entry_t *path;
3471         type_t            *top_type;
3472         bool               invalid;
3473 };
3474
3475 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3476 {
3477         size_t len = ARR_LEN(path->path);
3478
3479         for (size_t i = 0; i < len; ++i) {
3480                 const type_path_entry_t *entry = & path->path[i];
3481
3482                 type_t *type = skip_typeref(entry->type);
3483                 if (is_type_compound(type)) {
3484                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3485                 } else if (is_type_array(type)) {
3486                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3487                 } else {
3488                         fprintf(stderr, "-INVALID-");
3489                 }
3490         }
3491         fprintf(stderr, "  (");
3492         print_type(path->top_type);
3493         fprintf(stderr, ")");
3494 }
3495
3496 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3497 {
3498         size_t len = ARR_LEN(path->path);
3499         assert(len > 0);
3500         return & path->path[len-1];
3501 }
3502
3503 static type_path_entry_t *append_to_type_path(type_path_t *path)
3504 {
3505         size_t len = ARR_LEN(path->path);
3506         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3507
3508         type_path_entry_t *result = & path->path[len];
3509         memset(result, 0, sizeof(result[0]));
3510         return result;
3511 }
3512
3513 static size_t get_compound_member_count(const compound_type_t *type)
3514 {
3515         compound_t *compound  = type->compound;
3516         size_t      n_members = 0;
3517         entity_t   *member    = compound->members.entities;
3518         for ( ; member != NULL; member = member->base.next) {
3519                 ++n_members;
3520         }
3521
3522         return n_members;
3523 }
3524
3525 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3526 {
3527         type_t *orig_top_type = path->top_type;
3528         type_t *top_type      = skip_typeref(orig_top_type);
3529
3530         assert(is_type_compound(top_type) || is_type_array(top_type));
3531
3532         if (ARR_LEN(path->path) == 0) {
3533                 return NULL;
3534         } else {
3535                 type_path_entry_t *top         = get_type_path_top(path);
3536                 ir_initializer_t  *initializer = top->initializer;
3537                 return get_initializer_compound_value(initializer, top->index);
3538         }
3539 }
3540
3541 static void descend_into_subtype(type_path_t *path)
3542 {
3543         type_t *orig_top_type = path->top_type;
3544         type_t *top_type      = skip_typeref(orig_top_type);
3545
3546         assert(is_type_compound(top_type) || is_type_array(top_type));
3547
3548         ir_initializer_t *initializer = get_initializer_entry(path);
3549
3550         type_path_entry_t *top = append_to_type_path(path);
3551         top->type              = top_type;
3552
3553         size_t len;
3554
3555         if (is_type_compound(top_type)) {
3556                 compound_t *const compound = top_type->compound.compound;
3557                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3558
3559                 top->compound_entry = entry;
3560                 top->index          = 0;
3561                 len                 = get_compound_member_count(&top_type->compound);
3562                 if (entry != NULL) {
3563                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3564                         path->top_type = entry->declaration.type;
3565                 }
3566         } else {
3567                 assert(is_type_array(top_type));
3568                 assert(top_type->array.size > 0);
3569
3570                 top->index     = 0;
3571                 path->top_type = top_type->array.element_type;
3572                 len            = top_type->array.size;
3573         }
3574         if (initializer == NULL
3575                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3576                 initializer = create_initializer_compound(len);
3577                 /* we have to set the entry at the 2nd latest path entry... */
3578                 size_t path_len = ARR_LEN(path->path);
3579                 assert(path_len >= 1);
3580                 if (path_len > 1) {
3581                         type_path_entry_t *entry        = & path->path[path_len-2];
3582                         ir_initializer_t  *tinitializer = entry->initializer;
3583                         set_initializer_compound_value(tinitializer, entry->index,
3584                                                        initializer);
3585                 }
3586         }
3587         top->initializer = initializer;
3588 }
3589
3590 static void ascend_from_subtype(type_path_t *path)
3591 {
3592         type_path_entry_t *top = get_type_path_top(path);
3593
3594         path->top_type = top->type;
3595
3596         size_t len = ARR_LEN(path->path);
3597         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3598 }
3599
3600 static void walk_designator(type_path_t *path, const designator_t *designator)
3601 {
3602         /* designators start at current object type */
3603         ARR_RESIZE(type_path_entry_t, path->path, 1);
3604
3605         for ( ; designator != NULL; designator = designator->next) {
3606                 type_path_entry_t *top         = get_type_path_top(path);
3607                 type_t            *orig_type   = top->type;
3608                 type_t            *type        = skip_typeref(orig_type);
3609
3610                 if (designator->symbol != NULL) {
3611                         assert(is_type_compound(type));
3612                         size_t    index  = 0;
3613                         symbol_t *symbol = designator->symbol;
3614
3615                         compound_t *compound = type->compound.compound;
3616                         entity_t   *iter     = compound->members.entities;
3617                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3618                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3619
3620                         /* revert previous initialisations of other union elements */
3621                         if (type->kind == TYPE_COMPOUND_UNION) {
3622                                 ir_initializer_t *initializer = top->initializer;
3623                                 if (initializer != NULL
3624                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3625                                         /* are we writing to a new element? */
3626                                         ir_initializer_t *oldi
3627                                                 = get_initializer_compound_value(initializer, index);
3628                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3629                                                 /* clear initializer */
3630                                                 size_t len
3631                                                         = get_initializer_compound_n_entries(initializer);
3632                                                 ir_initializer_t *nulli = get_initializer_null();
3633                                                 for (size_t i = 0; i < len; ++i) {
3634                                                         set_initializer_compound_value(initializer, i,
3635                                                                                        nulli);
3636                                                 }
3637                                         }
3638                                 }
3639                         }
3640
3641                         top->type           = orig_type;
3642                         top->compound_entry = iter;
3643                         top->index          = index;
3644                         orig_type           = iter->declaration.type;
3645                 } else {
3646                         expression_t *array_index = designator->array_index;
3647                         assert(is_type_array(type));
3648
3649                         long index = fold_constant_to_int(array_index);
3650                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3651
3652                         top->type  = orig_type;
3653                         top->index = (size_t) index;
3654                         orig_type  = type->array.element_type;
3655                 }
3656                 path->top_type = orig_type;
3657
3658                 if (designator->next != NULL) {
3659                         descend_into_subtype(path);
3660                 }
3661         }
3662
3663         path->invalid  = false;
3664 }
3665
3666 static void advance_current_object(type_path_t *path)
3667 {
3668         if (path->invalid) {
3669                 /* TODO: handle this... */
3670                 panic("invalid initializer in ast2firm (excessive elements)");
3671         }
3672
3673         type_path_entry_t *top = get_type_path_top(path);
3674
3675         type_t *type = skip_typeref(top->type);
3676         if (is_type_union(type)) {
3677                 /* only the first element is initialized in unions */
3678                 top->compound_entry = NULL;
3679         } else if (is_type_struct(type)) {
3680                 entity_t *entry = top->compound_entry;
3681
3682                 top->index++;
3683                 entry               = skip_unnamed_bitfields(entry->base.next);
3684                 top->compound_entry = entry;
3685                 if (entry != NULL) {
3686                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3687                         path->top_type = entry->declaration.type;
3688                         return;
3689                 }
3690         } else {
3691                 assert(is_type_array(type));
3692
3693                 top->index++;
3694                 if (!type->array.size_constant || top->index < type->array.size) {
3695                         return;
3696                 }
3697         }
3698
3699         /* we're past the last member of the current sub-aggregate, try if we
3700          * can ascend in the type hierarchy and continue with another subobject */
3701         size_t len = ARR_LEN(path->path);
3702
3703         if (len > 1) {
3704                 ascend_from_subtype(path);
3705                 advance_current_object(path);
3706         } else {
3707                 path->invalid = true;
3708         }
3709 }
3710
3711
3712 static ir_initializer_t *create_ir_initializer_value(
3713                 const initializer_value_t *initializer)
3714 {
3715         if (is_type_compound(initializer->value->base.type)) {
3716                 panic("initializer creation for compounds not implemented yet");
3717         }
3718         type_t       *type = initializer->value->base.type;
3719         expression_t *expr = initializer->value;
3720         ir_node *value = expression_to_firm(expr);
3721         ir_mode *mode  = get_ir_mode_storage(type);
3722         value          = create_conv(NULL, value, mode);
3723         return create_initializer_const(value);
3724 }
3725
3726 /** test wether type can be initialized by a string constant */
3727 static bool is_string_type(type_t *type)
3728 {
3729         if (!is_type_array(type))
3730                 return false;
3731
3732         type_t *const inner = skip_typeref(type->array.element_type);
3733         return is_type_integer(inner);
3734 }
3735
3736 static ir_initializer_t *create_ir_initializer_list(
3737                 const initializer_list_t *initializer, type_t *type)
3738 {
3739         type_path_t path;
3740         memset(&path, 0, sizeof(path));
3741         path.top_type = type;
3742         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3743
3744         descend_into_subtype(&path);
3745
3746         for (size_t i = 0; i < initializer->len; ++i) {
3747                 const initializer_t *sub_initializer = initializer->initializers[i];
3748
3749                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3750                         walk_designator(&path, sub_initializer->designator.designator);
3751                         continue;
3752                 }
3753
3754                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3755                         /* we might have to descend into types until we're at a scalar
3756                          * type */
3757                         while(true) {
3758                                 type_t *orig_top_type = path.top_type;
3759                                 type_t *top_type      = skip_typeref(orig_top_type);
3760
3761                                 if (is_type_scalar(top_type))
3762                                         break;
3763                                 descend_into_subtype(&path);
3764                         }
3765                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3766                         /* we might have to descend into types until we're at a scalar
3767                          * type */
3768                         while (true) {
3769                                 type_t *orig_top_type = path.top_type;
3770                                 type_t *top_type      = skip_typeref(orig_top_type);
3771
3772                                 if (is_string_type(top_type))
3773                                         break;
3774                                 descend_into_subtype(&path);
3775                         }
3776                 }
3777
3778                 ir_initializer_t *sub_irinitializer
3779                         = create_ir_initializer(sub_initializer, path.top_type);
3780
3781                 size_t path_len = ARR_LEN(path.path);
3782                 assert(path_len >= 1);
3783                 type_path_entry_t *entry        = & path.path[path_len-1];
3784                 ir_initializer_t  *tinitializer = entry->initializer;
3785                 set_initializer_compound_value(tinitializer, entry->index,
3786                                                sub_irinitializer);
3787
3788                 advance_current_object(&path);
3789         }
3790
3791         assert(ARR_LEN(path.path) >= 1);
3792         ir_initializer_t *result = path.path[0].initializer;
3793         DEL_ARR_F(path.path);
3794
3795         return result;
3796 }
3797
3798 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3799 {
3800         type = skip_typeref(type);
3801
3802         assert(type->kind == TYPE_ARRAY);
3803         assert(type->array.size_constant);
3804         string_literal_expression_t const *const str = get_init_string(init);
3805         size_t            const str_len = str->value.size;
3806         size_t            const arr_len = type->array.size;
3807         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
3808         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
3809         char const       *      p       = str->value.begin;
3810         switch (str->value.encoding) {
3811         case STRING_ENCODING_CHAR:
3812                 for (size_t i = 0; i != arr_len; ++i) {
3813                         char              const c      = i < str_len ? *p++ : 0;
3814                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3815                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3816                         set_initializer_compound_value(irinit, i, tvinit);
3817                 }
3818                 break;
3819
3820         case STRING_ENCODING_WIDE:
3821                 for (size_t i = 0; i != arr_len; ++i) {
3822                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
3823                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3824                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3825                         set_initializer_compound_value(irinit, i, tvinit);
3826                 }
3827                 break;
3828         }
3829
3830         return irinit;
3831 }
3832
3833 static ir_initializer_t *create_ir_initializer(
3834                 const initializer_t *initializer, type_t *type)
3835 {
3836         switch(initializer->kind) {
3837                 case INITIALIZER_STRING:
3838                         return create_ir_initializer_string(initializer, type);
3839
3840                 case INITIALIZER_LIST:
3841                         return create_ir_initializer_list(&initializer->list, type);
3842
3843                 case INITIALIZER_VALUE:
3844                         return create_ir_initializer_value(&initializer->value);
3845
3846                 case INITIALIZER_DESIGNATOR:
3847                         panic("unexpected designator initializer found");
3848         }
3849         panic("unknown initializer");
3850 }
3851
3852 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
3853  *  are elements [...] the remainder of the aggregate shall be initialized
3854  *  implicitly the same as objects that have static storage duration. */
3855 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3856                 ir_node *base_addr)
3857 {
3858         /* for unions we must NOT do anything for null initializers */
3859         ir_type *owner = get_entity_owner(entity);
3860         if (is_Union_type(owner)) {
3861                 return;
3862         }
3863
3864         ir_type *ent_type = get_entity_type(entity);
3865         /* create sub-initializers for a compound type */
3866         if (is_compound_type(ent_type)) {
3867                 unsigned n_members = get_compound_n_members(ent_type);
3868                 for (unsigned n = 0; n < n_members; ++n) {
3869                         ir_entity *member = get_compound_member(ent_type, n);
3870                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3871                                                                 member);
3872                         create_dynamic_null_initializer(member, dbgi, addr);
3873                 }
3874                 return;
3875         }
3876         if (is_Array_type(ent_type)) {
3877                 assert(has_array_upper_bound(ent_type, 0));
3878                 long n = get_array_upper_bound_int(ent_type, 0);
3879                 for (long i = 0; i < n; ++i) {
3880                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3881                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3882                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3883                         ir_node   *in[1]    = { cnst };
3884                         ir_entity *arrent   = get_array_element_entity(ent_type);
3885                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3886                                                         arrent);
3887                         create_dynamic_null_initializer(arrent, dbgi, addr);
3888                 }
3889                 return;
3890         }
3891
3892         ir_mode *value_mode = get_type_mode(ent_type);
3893         ir_node *node       = new_Const(get_mode_null(value_mode));
3894
3895         /* is it a bitfield type? */
3896         if (is_Primitive_type(ent_type) &&
3897                         get_primitive_base_type(ent_type) != NULL) {
3898                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3899                 return;
3900         }
3901
3902         ir_node *mem    = get_store();
3903         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3904         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3905         set_store(proj_m);
3906 }
3907
3908 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3909                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3910 {
3911         switch(get_initializer_kind(initializer)) {
3912         case IR_INITIALIZER_NULL:
3913                 create_dynamic_null_initializer(entity, dbgi, base_addr);
3914                 return;
3915         case IR_INITIALIZER_CONST: {
3916                 ir_node *node     = get_initializer_const_value(initializer);
3917                 ir_type *ent_type = get_entity_type(entity);
3918
3919                 /* is it a bitfield type? */
3920                 if (is_Primitive_type(ent_type) &&
3921                                 get_primitive_base_type(ent_type) != NULL) {
3922                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3923                         return;
3924                 }
3925
3926                 assert(get_type_mode(type) == get_irn_mode(node));
3927                 ir_node *mem    = get_store();
3928                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3929                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3930                 set_store(proj_m);
3931                 return;
3932         }
3933         case IR_INITIALIZER_TARVAL: {
3934                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
3935                 ir_node   *cnst     = new_d_Const(dbgi, tv);
3936                 ir_type   *ent_type = get_entity_type(entity);
3937
3938                 /* is it a bitfield type? */
3939                 if (is_Primitive_type(ent_type) &&
3940                                 get_primitive_base_type(ent_type) != NULL) {
3941                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3942                         return;
3943                 }
3944
3945                 assert(get_type_mode(type) == get_tarval_mode(tv));
3946                 ir_node *mem    = get_store();
3947                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3948                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3949                 set_store(proj_m);
3950                 return;
3951         }
3952         case IR_INITIALIZER_COMPOUND: {
3953                 assert(is_compound_type(type) || is_Array_type(type));
3954                 int n_members;
3955                 if (is_Array_type(type)) {
3956                         assert(has_array_upper_bound(type, 0));
3957                         n_members = get_array_upper_bound_int(type, 0);
3958                 } else {
3959                         n_members = get_compound_n_members(type);
3960                 }
3961
3962                 if (get_initializer_compound_n_entries(initializer)
3963                                 != (unsigned) n_members)
3964                         panic("initializer doesn't match compound type");
3965
3966                 for (int i = 0; i < n_members; ++i) {
3967                         ir_node   *addr;
3968                         ir_type   *irtype;
3969                         ir_entity *sub_entity;
3970                         if (is_Array_type(type)) {
3971                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3972                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3973                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3974                                 ir_node   *in[1]    = { cnst };
3975                                 irtype     = get_array_element_type(type);
3976                                 sub_entity = get_array_element_entity(type);
3977                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3978                                                        sub_entity);
3979                         } else {
3980                                 sub_entity = get_compound_member(type, i);
3981                                 irtype     = get_entity_type(sub_entity);
3982                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3983                                                              sub_entity);
3984                         }
3985
3986                         ir_initializer_t *sub_init
3987                                 = get_initializer_compound_value(initializer, i);
3988
3989                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3990                                                        addr);
3991                 }
3992                 return;
3993         }
3994         }
3995
3996         panic("invalid IR_INITIALIZER found");
3997 }
3998
3999 static void create_dynamic_initializer(ir_initializer_t *initializer,
4000                 dbg_info *dbgi, ir_entity *entity)
4001 {
4002         ir_node *frame     = get_irg_frame(current_ir_graph);
4003         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4004         ir_type *type      = get_entity_type(entity);
4005
4006         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4007 }
4008
4009 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4010                                      ir_entity *entity, type_t *type)
4011 {
4012         ir_node *memory = get_store();
4013         ir_node *nomem  = new_NoMem();
4014         ir_node *frame  = get_irg_frame(current_ir_graph);
4015         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4016
4017         if (initializer->kind == INITIALIZER_VALUE) {
4018                 initializer_value_t *initializer_value = &initializer->value;
4019
4020                 ir_node *value = expression_to_firm(initializer_value->value);
4021                 type = skip_typeref(type);
4022                 assign_value(dbgi, addr, type, value);
4023                 return;
4024         }
4025
4026         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4027                 ir_initializer_t *irinitializer
4028                         = create_ir_initializer(initializer, type);
4029
4030                 create_dynamic_initializer(irinitializer, dbgi, entity);
4031                 return;
4032         }
4033
4034         /* create a "template" entity which is copied to the entity on the stack */
4035         ir_entity *const init_entity
4036                 = create_initializer_entity(dbgi, initializer, type);
4037         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4038         ir_type *const irtype   = get_ir_type(type);
4039         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4040
4041         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4042         set_store(copyb_mem);
4043 }
4044
4045 static void create_initializer_local_variable_entity(entity_t *entity)
4046 {
4047         assert(entity->kind == ENTITY_VARIABLE);
4048         initializer_t *initializer = entity->variable.initializer;
4049         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4050         ir_entity     *irentity    = entity->variable.v.entity;
4051         type_t        *type        = entity->declaration.type;
4052
4053         create_local_initializer(initializer, dbgi, irentity, type);
4054 }
4055
4056 static void create_variable_initializer(entity_t *entity)
4057 {
4058         assert(entity->kind == ENTITY_VARIABLE);
4059         initializer_t *initializer = entity->variable.initializer;
4060         if (initializer == NULL)
4061                 return;
4062
4063         declaration_kind_t declaration_kind
4064                 = (declaration_kind_t) entity->declaration.kind;
4065         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4066                 create_initializer_local_variable_entity(entity);
4067                 return;
4068         }
4069
4070         type_t            *type = entity->declaration.type;
4071         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4072
4073         if (initializer->kind == INITIALIZER_VALUE) {
4074                 expression_t *      value     = initializer->value.value;
4075                 type_t       *const init_type = skip_typeref(value->base.type);
4076
4077                 if (!is_type_scalar(init_type)) {
4078                         /* skip convs */
4079                         while (value->kind == EXPR_UNARY_CAST)
4080                                 value = value->unary.value;
4081
4082                         if (value->kind != EXPR_COMPOUND_LITERAL)
4083                                 panic("expected non-scalar initializer to be a compound literal");
4084                         initializer = value->compound_literal.initializer;
4085                         goto have_initializer;
4086                 }
4087
4088                 ir_node  *      node = expression_to_firm(value);
4089                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4090                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4091                 node = create_conv(dbgi, node, mode);
4092
4093                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4094                         set_value(entity->variable.v.value_number, node);
4095                 } else {
4096                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4097
4098                         ir_entity *irentity = entity->variable.v.entity;
4099
4100                         if (tq & TYPE_QUALIFIER_CONST
4101                                         && get_entity_owner(irentity) != get_tls_type()) {
4102                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4103                         }
4104                         set_atomic_ent_value(irentity, node);
4105                 }
4106         } else {
4107 have_initializer:
4108                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4109                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4110
4111                 ir_entity        *irentity        = entity->variable.v.entity;
4112                 ir_initializer_t *irinitializer
4113                         = create_ir_initializer(initializer, type);
4114
4115                 if (tq & TYPE_QUALIFIER_CONST) {
4116                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4117                 }
4118                 set_entity_initializer(irentity, irinitializer);
4119         }
4120 }
4121
4122 static void create_variable_length_array(entity_t *entity)
4123 {
4124         assert(entity->kind == ENTITY_VARIABLE);
4125         assert(entity->variable.initializer == NULL);
4126
4127         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4128         entity->variable.v.vla_base = NULL;
4129
4130         /* TODO: record VLA somewhere so we create the free node when we leave
4131          * it's scope */
4132 }
4133
4134 static void allocate_variable_length_array(entity_t *entity)
4135 {
4136         assert(entity->kind == ENTITY_VARIABLE);
4137         assert(entity->variable.initializer == NULL);
4138         assert(currently_reachable());
4139
4140         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4141         type_t   *type      = entity->declaration.type;
4142         ir_type  *el_type   = get_ir_type(type->array.element_type);
4143
4144         /* make sure size_node is calculated */
4145         get_type_size_node(type);
4146         ir_node  *elems = type->array.size_node;
4147         ir_node  *mem   = get_store();
4148         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4149
4150         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4151         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4152         set_store(proj_m);
4153
4154         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4155         entity->variable.v.vla_base = addr;
4156 }
4157
4158 /**
4159  * Creates a Firm local variable from a declaration.
4160  */
4161 static void create_local_variable(entity_t *entity)
4162 {
4163         assert(entity->kind == ENTITY_VARIABLE);
4164         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4165
4166         bool needs_entity = entity->variable.address_taken;
4167         type_t *type = skip_typeref(entity->declaration.type);
4168
4169         /* is it a variable length array? */
4170         if (is_type_array(type) && !type->array.size_constant) {
4171                 create_variable_length_array(entity);
4172                 return;
4173         } else if (is_type_array(type) || is_type_compound(type)) {
4174                 needs_entity = true;
4175         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4176                 needs_entity = true;
4177         }
4178
4179         if (needs_entity) {
4180                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4181                 create_variable_entity(entity,
4182                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4183                                        frame_type);
4184         } else {
4185                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4186                 entity->variable.v.value_number = next_value_number_function;
4187                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4188                                         entity);
4189                 ++next_value_number_function;
4190         }
4191 }
4192
4193 static void create_local_static_variable(entity_t *entity)
4194 {
4195         assert(entity->kind == ENTITY_VARIABLE);
4196         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4197
4198         type_t   *type           = skip_typeref(entity->declaration.type);
4199         ir_type  *const var_type = entity->variable.thread_local ?
4200                 get_tls_type() : get_glob_type();
4201         ir_type  *const irtype   = get_ir_type(type);
4202         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4203
4204         size_t l = strlen(entity->base.symbol->string);
4205         char   buf[l + sizeof(".%u")];
4206         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4207         ident     *const id       = id_unique(buf);
4208         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4209
4210         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4211                 set_entity_volatility(irentity, volatility_is_volatile);
4212         }
4213
4214         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4215         entity->variable.v.entity = irentity;
4216
4217         set_entity_ld_ident(irentity, id);
4218         set_entity_visibility(irentity, ir_visibility_local);
4219
4220         if (entity->variable.initializer == NULL) {
4221                 ir_initializer_t *null_init = get_initializer_null();
4222                 set_entity_initializer(irentity, null_init);
4223         }
4224
4225         ir_graph *const old_current_ir_graph = current_ir_graph;
4226         current_ir_graph = get_const_code_irg();
4227
4228         create_variable_initializer(entity);
4229
4230         assert(current_ir_graph == get_const_code_irg());
4231         current_ir_graph = old_current_ir_graph;
4232 }
4233
4234
4235
4236 static ir_node *return_statement_to_firm(return_statement_t *statement)
4237 {
4238         if (!currently_reachable())
4239                 return NULL;
4240
4241         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4242         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4243         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4244
4245         int in_len;
4246         if (!is_type_void(type)) {
4247                 ir_mode *const mode = get_ir_mode_storage(type);
4248                 if (res) {
4249                         res = create_conv(dbgi, res, mode);
4250                 } else {
4251                         res = new_Unknown(mode);
4252                 }
4253                 in_len = 1;
4254         } else {
4255                 in_len = 0;
4256         }
4257
4258         ir_node *const in[1] = { res };
4259         ir_node *const store = get_store();
4260         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4261
4262         ir_node *end_block = get_irg_end_block(current_ir_graph);
4263         add_immBlock_pred(end_block, ret);
4264
4265         set_unreachable_now();
4266         return NULL;
4267 }
4268
4269 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4270 {
4271         if (!currently_reachable())
4272                 return NULL;
4273
4274         return expression_to_firm(statement->expression);
4275 }
4276
4277 static void create_local_declarations(entity_t*);
4278
4279 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4280 {
4281         create_local_declarations(compound->scope.entities);
4282
4283         ir_node     *result    = NULL;
4284         statement_t *statement = compound->statements;
4285         for ( ; statement != NULL; statement = statement->base.next) {
4286                 result = statement_to_firm(statement);
4287         }
4288
4289         return result;
4290 }
4291
4292 static void create_global_variable(entity_t *entity)
4293 {
4294         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4295         ir_visibility       visibility = ir_visibility_external;
4296         storage_class_tag_t storage
4297                 = (storage_class_tag_t)entity->declaration.storage_class;
4298         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4299         assert(entity->kind == ENTITY_VARIABLE);
4300
4301         switch (storage) {
4302         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4303         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4304         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4305         case STORAGE_CLASS_TYPEDEF:
4306         case STORAGE_CLASS_AUTO:
4307         case STORAGE_CLASS_REGISTER:
4308                 panic("invalid storage class for global var");
4309         }
4310
4311         /* "common" symbols */
4312         if (storage == STORAGE_CLASS_NONE
4313             && entity->variable.initializer == NULL
4314             && !entity->variable.thread_local
4315             && (modifiers & DM_WEAK) == 0) {
4316                 linkage |= IR_LINKAGE_MERGE;
4317         }
4318
4319         ir_type *var_type = get_glob_type();
4320         if (entity->variable.thread_local) {
4321                 var_type = get_tls_type();
4322         }
4323         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4324         ir_entity *irentity = entity->variable.v.entity;
4325         add_entity_linkage(irentity, linkage);
4326         set_entity_visibility(irentity, visibility);
4327         if (entity->variable.initializer == NULL
4328             && storage != STORAGE_CLASS_EXTERN) {
4329                 ir_initializer_t *null_init = get_initializer_null();
4330                 set_entity_initializer(irentity, null_init);
4331         }
4332 }
4333
4334 static void create_local_declaration(entity_t *entity)
4335 {
4336         assert(is_declaration(entity));
4337
4338         /* construct type */
4339         (void) get_ir_type(entity->declaration.type);
4340         if (entity->base.symbol == NULL) {
4341                 return;
4342         }
4343
4344         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4345         case STORAGE_CLASS_STATIC:
4346                 if (entity->kind == ENTITY_FUNCTION) {
4347                         (void)get_function_entity(entity, NULL);
4348                 } else {
4349                         create_local_static_variable(entity);
4350                 }
4351                 return;
4352         case STORAGE_CLASS_EXTERN:
4353                 if (entity->kind == ENTITY_FUNCTION) {
4354                         assert(entity->function.statement == NULL);
4355                         (void)get_function_entity(entity, NULL);
4356                 } else {
4357                         create_global_variable(entity);
4358                         create_variable_initializer(entity);
4359                 }
4360                 return;
4361         case STORAGE_CLASS_NONE:
4362         case STORAGE_CLASS_AUTO:
4363         case STORAGE_CLASS_REGISTER:
4364                 if (entity->kind == ENTITY_FUNCTION) {
4365                         if (entity->function.statement != NULL) {
4366                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4367                                 (void)get_function_entity(entity, owner);
4368                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4369                                 enqueue_inner_function(entity);
4370                         } else {
4371                                 (void)get_function_entity(entity, NULL);
4372                         }
4373                 } else {
4374                         create_local_variable(entity);
4375                 }
4376                 return;
4377         case STORAGE_CLASS_TYPEDEF:
4378                 break;
4379         }
4380         panic("invalid storage class found");
4381 }
4382
4383 static void create_local_declarations(entity_t *e)
4384 {
4385         for (; e; e = e->base.next) {
4386                 if (is_declaration(e))
4387                         create_local_declaration(e);
4388         }
4389 }
4390
4391 static void initialize_local_declaration(entity_t *entity)
4392 {
4393         if (entity->base.symbol == NULL)
4394                 return;
4395
4396         // no need to emit code in dead blocks
4397         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4398                         && !currently_reachable())
4399                 return;
4400
4401         switch ((declaration_kind_t) entity->declaration.kind) {
4402         case DECLARATION_KIND_LOCAL_VARIABLE:
4403         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4404                 create_variable_initializer(entity);
4405                 return;
4406
4407         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4408                 allocate_variable_length_array(entity);
4409                 return;
4410
4411         case DECLARATION_KIND_COMPOUND_MEMBER:
4412         case DECLARATION_KIND_GLOBAL_VARIABLE:
4413         case DECLARATION_KIND_FUNCTION:
4414         case DECLARATION_KIND_INNER_FUNCTION:
4415                 return;
4416
4417         case DECLARATION_KIND_PARAMETER:
4418         case DECLARATION_KIND_PARAMETER_ENTITY:
4419                 panic("can't initialize parameters");
4420
4421         case DECLARATION_KIND_UNKNOWN:
4422                 panic("can't initialize unknown declaration");
4423         }
4424         panic("invalid declaration kind");
4425 }
4426
4427 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4428 {
4429         entity_t *entity = statement->declarations_begin;
4430         if (entity == NULL)
4431                 return NULL;
4432
4433         entity_t *const last = statement->declarations_end;
4434         for ( ;; entity = entity->base.next) {
4435                 if (is_declaration(entity)) {
4436                         initialize_local_declaration(entity);
4437                 } else if (entity->kind == ENTITY_TYPEDEF) {
4438                         /* §6.7.7:3  Any array size expressions associated with variable length
4439                          * array declarators are evaluated each time the declaration of the
4440                          * typedef name is reached in the order of execution. */
4441                         type_t *const type = skip_typeref(entity->typedefe.type);
4442                         if (is_type_array(type) && type->array.is_vla)
4443                                 get_vla_size(&type->array);
4444                 }
4445                 if (entity == last)
4446                         break;
4447         }
4448
4449         return NULL;
4450 }
4451
4452 static ir_node *if_statement_to_firm(if_statement_t *statement)
4453 {
4454         create_local_declarations(statement->scope.entities);
4455
4456         /* Create the condition. */
4457         ir_node *true_block  = NULL;
4458         ir_node *false_block = NULL;
4459         if (currently_reachable()) {
4460                 true_block  = new_immBlock();
4461                 false_block = new_immBlock();
4462                 create_condition_evaluation(statement->condition, true_block, false_block);
4463                 mature_immBlock(true_block);
4464                 mature_immBlock(false_block);
4465         }
4466
4467         /* Create the true statement. */
4468         set_cur_block(true_block);
4469         statement_to_firm(statement->true_statement);
4470         ir_node *fallthrough_block = get_cur_block();
4471
4472         /* Create the false statement. */
4473         set_cur_block(false_block);
4474         if (statement->false_statement != NULL) {
4475                 statement_to_firm(statement->false_statement);
4476         }
4477
4478         /* Handle the block after the if-statement.  Minor simplification and
4479          * optimisation: Reuse the false/true block as fallthrough block, if the
4480          * true/false statement does not pass control to the fallthrough block, e.g.
4481          * in the typical if (x) return; pattern. */
4482         if (fallthrough_block) {
4483                 if (currently_reachable()) {
4484                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4485                         ir_node *const f_jump = new_Jmp();
4486                         ir_node *const in[]   = { t_jump, f_jump };
4487                         fallthrough_block = new_Block(2, in);
4488                 }
4489                 set_cur_block(fallthrough_block);
4490         }
4491
4492         return NULL;
4493 }
4494
4495 /**
4496  * Add an unconditional jump to the target block.  If the source block is not
4497  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4498  * loops.  This is necessary if the jump potentially enters a loop.
4499  */
4500 static void jump_to(ir_node *const target_block)
4501 {
4502         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4503         add_immBlock_pred(target_block, pred);
4504 }
4505
4506 /**
4507  * Add an unconditional jump to the target block, if the current block is
4508  * reachable and do nothing otherwise.  This is only valid if the jump does not
4509  * enter a loop (a back edge is ok).
4510  */
4511 static void jump_if_reachable(ir_node *const target_block)
4512 {
4513         if (currently_reachable())
4514                 add_immBlock_pred(target_block, new_Jmp());
4515 }
4516
4517 static ir_node *get_break_label(void)
4518 {
4519         if (break_label == NULL) {
4520                 break_label = new_immBlock();
4521         }
4522         return break_label;
4523 }
4524
4525 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4526 {
4527         create_local_declarations(statement->scope.entities);
4528
4529         /* create the header block */
4530         ir_node *header_block = new_immBlock();
4531
4532         /* the loop body */
4533         ir_node *body_block = new_immBlock();
4534         jump_to(body_block);
4535
4536         ir_node *old_continue_label = continue_label;
4537         ir_node *old_break_label    = break_label;
4538         continue_label              = header_block;
4539         break_label                 = NULL;
4540
4541         set_cur_block(body_block);
4542         statement_to_firm(statement->body);
4543         ir_node *const false_block = get_break_label();
4544
4545         assert(continue_label == header_block);
4546         continue_label = old_continue_label;
4547         break_label    = old_break_label;
4548
4549         jump_if_reachable(header_block);
4550
4551         /* create the condition */
4552         mature_immBlock(header_block);
4553         set_cur_block(header_block);
4554
4555         create_condition_evaluation(statement->condition, body_block, false_block);
4556         mature_immBlock(body_block);
4557         mature_immBlock(false_block);
4558
4559         set_cur_block(false_block);
4560         return NULL;
4561 }
4562
4563 static ir_node *for_statement_to_firm(for_statement_t *statement)
4564 {
4565         create_local_declarations(statement->scope.entities);
4566
4567         if (currently_reachable()) {
4568                 entity_t *entity = statement->scope.entities;
4569                 for ( ; entity != NULL; entity = entity->base.next) {
4570                         if (!is_declaration(entity))
4571                                 continue;
4572
4573                         initialize_local_declaration(entity);
4574                 }
4575
4576                 if (statement->initialisation != NULL) {
4577                         expression_to_firm(statement->initialisation);
4578                 }
4579         }
4580
4581         /* Create the header block */
4582         ir_node *const header_block = new_immBlock();
4583         jump_to(header_block);
4584
4585         /* Create the condition. */
4586         ir_node            *body_block;
4587         ir_node            *false_block;
4588         expression_t *const cond = statement->condition;
4589         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4590                 body_block  = new_immBlock();
4591                 false_block = new_immBlock();
4592
4593                 set_cur_block(header_block);
4594                 create_condition_evaluation(cond, body_block, false_block);
4595                 mature_immBlock(body_block);
4596         } else {
4597                 /* for-ever. */
4598                 body_block  = header_block;
4599                 false_block = NULL;
4600
4601                 keep_alive(header_block);
4602                 keep_all_memory(header_block);
4603         }
4604
4605         /* Create the step block, if necessary. */
4606         ir_node      *      step_block = header_block;
4607         expression_t *const step       = statement->step;
4608         if (step != NULL) {
4609                 step_block = new_immBlock();
4610         }
4611
4612         ir_node *const old_continue_label = continue_label;
4613         ir_node *const old_break_label    = break_label;
4614         continue_label = step_block;
4615         break_label    = false_block;
4616
4617         /* Create the loop body. */
4618         set_cur_block(body_block);
4619         statement_to_firm(statement->body);
4620         jump_if_reachable(step_block);
4621
4622         /* Create the step code. */
4623         if (step != NULL) {
4624                 mature_immBlock(step_block);
4625                 set_cur_block(step_block);
4626                 expression_to_firm(step);
4627                 jump_if_reachable(header_block);
4628         }
4629
4630         mature_immBlock(header_block);
4631         assert(false_block == NULL || false_block == break_label);
4632         false_block = break_label;
4633         if (false_block != NULL) {
4634                 mature_immBlock(false_block);
4635         }
4636         set_cur_block(false_block);
4637
4638         assert(continue_label == step_block);
4639         continue_label = old_continue_label;
4640         break_label    = old_break_label;
4641         return NULL;
4642 }
4643
4644 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4645 {
4646         if (!currently_reachable())
4647                 return NULL;
4648
4649         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4650         ir_node  *jump = new_d_Jmp(dbgi);
4651         add_immBlock_pred(target_block, jump);
4652
4653         set_unreachable_now();
4654         return NULL;
4655 }
4656
4657 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4658 {
4659         /* determine number of cases */
4660         size_t n_cases = 0;
4661         for (case_label_statement_t *l = statement->first_case; l != NULL;
4662              l = l->next) {
4663                 /* default case */
4664                 if (l->expression == NULL)
4665                         continue;
4666                 if (l->is_empty_range)
4667                         continue;
4668                 ++n_cases;
4669         }
4670
4671         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4672         size_t           i   = 0;
4673         for (case_label_statement_t *l = statement->first_case; l != NULL;
4674              l = l->next) {
4675             if (l->expression == NULL) {
4676                         l->pn = pn_Switch_default;
4677                         continue;
4678                 }
4679                 if (l->is_empty_range)
4680                         continue;
4681                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4682                 ir_tarval *max = min;
4683                 long       pn  = (long) i+1;
4684                 if (l->end_range != NULL)
4685                         max = fold_constant_to_tarval(l->end_range);
4686                 ir_switch_table_set(res, i++, min, max, pn);
4687                 l->pn = pn;
4688         }
4689         return res;
4690 }
4691
4692 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4693 {
4694         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4695         ir_node  *switch_node = NULL;
4696
4697         if (currently_reachable()) {
4698                 ir_node *expression = expression_to_firm(statement->expression);
4699                 ir_switch_table *table = create_switch_table(statement);
4700                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4701
4702                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4703         }
4704
4705         set_unreachable_now();
4706
4707         ir_node *const old_switch            = current_switch;
4708         ir_node *const old_break_label       = break_label;
4709         const bool     old_saw_default_label = saw_default_label;
4710         saw_default_label                    = false;
4711         current_switch                       = switch_node;
4712         break_label                          = NULL;
4713
4714         statement_to_firm(statement->body);
4715
4716         if (currently_reachable()) {
4717                 add_immBlock_pred(get_break_label(), new_Jmp());
4718         }
4719
4720         if (!saw_default_label && switch_node) {
4721                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4722                 add_immBlock_pred(get_break_label(), proj);
4723         }
4724
4725         if (break_label != NULL) {
4726                 mature_immBlock(break_label);
4727         }
4728         set_cur_block(break_label);
4729
4730         assert(current_switch == switch_node);
4731         current_switch    = old_switch;
4732         break_label       = old_break_label;
4733         saw_default_label = old_saw_default_label;
4734         return NULL;
4735 }
4736
4737 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4738 {
4739         if (statement->is_empty_range)
4740                 return NULL;
4741
4742         if (current_switch != NULL) {
4743                 ir_node *block = new_immBlock();
4744                 /* Fallthrough from previous case */
4745                 jump_if_reachable(block);
4746
4747                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4748                 add_immBlock_pred(block, proj);
4749                 if (statement->expression == NULL)
4750                         saw_default_label = true;
4751
4752                 mature_immBlock(block);
4753                 set_cur_block(block);
4754         }
4755
4756         return statement_to_firm(statement->statement);
4757 }
4758
4759 static ir_node *label_to_firm(const label_statement_t *statement)
4760 {
4761         ir_node *block = get_label_block(statement->label);
4762         jump_to(block);
4763
4764         set_cur_block(block);
4765         keep_alive(block);
4766         keep_all_memory(block);
4767
4768         return statement_to_firm(statement->statement);
4769 }
4770
4771 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4772 {
4773         if (!currently_reachable())
4774                 return NULL;
4775
4776         ir_node  *const irn  = expression_to_firm(statement->expression);
4777         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4778         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
4779
4780         set_irn_link(ijmp, ijmp_list);
4781         ijmp_list = ijmp;
4782
4783         set_unreachable_now();
4784         return NULL;
4785 }
4786
4787 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4788 {
4789         bool           needs_memory = statement->is_volatile;
4790         size_t         n_clobbers   = 0;
4791         asm_clobber_t *clobber      = statement->clobbers;
4792         for ( ; clobber != NULL; clobber = clobber->next) {
4793                 const char *clobber_str = clobber->clobber.begin;
4794
4795                 if (!be_is_valid_clobber(clobber_str)) {
4796                         errorf(&statement->base.source_position,
4797                                    "invalid clobber '%s' specified", clobber->clobber);
4798                         continue;
4799                 }
4800
4801                 if (streq(clobber_str, "memory")) {
4802                         needs_memory = true;
4803                         continue;
4804                 }
4805
4806                 ident *id = new_id_from_str(clobber_str);
4807                 obstack_ptr_grow(&asm_obst, id);
4808                 ++n_clobbers;
4809         }
4810         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4811         ident **clobbers = NULL;
4812         if (n_clobbers > 0) {
4813                 clobbers = obstack_finish(&asm_obst);
4814         }
4815
4816         size_t n_inputs  = 0;
4817         asm_argument_t *argument = statement->inputs;
4818         for ( ; argument != NULL; argument = argument->next)
4819                 n_inputs++;
4820         size_t n_outputs = 0;
4821         argument = statement->outputs;
4822         for ( ; argument != NULL; argument = argument->next)
4823                 n_outputs++;
4824
4825         unsigned next_pos = 0;
4826
4827         ir_node *ins[n_inputs + n_outputs + 1];
4828         size_t   in_size = 0;
4829
4830         ir_asm_constraint tmp_in_constraints[n_outputs];
4831
4832         const expression_t *out_exprs[n_outputs];
4833         ir_node            *out_addrs[n_outputs];
4834         size_t              out_size = 0;
4835
4836         argument = statement->outputs;
4837         for ( ; argument != NULL; argument = argument->next) {
4838                 const char *constraints = argument->constraints.begin;
4839                 asm_constraint_flags_t asm_flags
4840                         = be_parse_asm_constraints(constraints);
4841
4842                 {
4843                         source_position_t const *const pos = &statement->base.source_position;
4844                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4845                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4846                         }
4847                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4848                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
4849                                 continue;
4850                         }
4851                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4852                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4853                                 continue;
4854                         }
4855                 }
4856
4857                 unsigned pos = next_pos++;
4858                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4859                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4860                         expression_t *expr = argument->expression;
4861                         ir_node      *addr = expression_to_addr(expr);
4862                         /* in+output, construct an artifical same_as constraint on the
4863                          * input */
4864                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4865                                 char     buf[64];
4866                                 ir_node *value = get_value_from_lvalue(expr, addr);
4867
4868                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4869
4870                                 ir_asm_constraint constraint;
4871                                 constraint.pos              = pos;
4872                                 constraint.constraint       = new_id_from_str(buf);
4873                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4874                                 tmp_in_constraints[in_size] = constraint;
4875                                 ins[in_size] = value;
4876
4877                                 ++in_size;
4878                         }
4879
4880                         out_exprs[out_size] = expr;
4881                         out_addrs[out_size] = addr;
4882                         ++out_size;
4883                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4884                         /* pure memory ops need no input (but we have to make sure we
4885                          * attach to the memory) */
4886                         assert(! (asm_flags &
4887                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4888                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4889                         needs_memory = true;
4890
4891                         /* we need to attach the address to the inputs */
4892                         expression_t *expr = argument->expression;
4893
4894                         ir_asm_constraint constraint;
4895                         constraint.pos              = pos;
4896                         constraint.constraint       = new_id_from_str(constraints);
4897                         constraint.mode             = mode_M;
4898                         tmp_in_constraints[in_size] = constraint;
4899
4900                         ins[in_size] = expression_to_addr(expr);
4901                         ++in_size;
4902                         continue;
4903                 } else {
4904                         errorf(&statement->base.source_position,
4905                                "only modifiers but no place set in constraints '%s'",
4906                                constraints);
4907                         continue;
4908                 }
4909
4910                 ir_asm_constraint constraint;
4911                 constraint.pos        = pos;
4912                 constraint.constraint = new_id_from_str(constraints);
4913                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
4914
4915                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4916         }
4917         assert(obstack_object_size(&asm_obst)
4918                         == out_size * sizeof(ir_asm_constraint));
4919         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4920
4921
4922         obstack_grow(&asm_obst, tmp_in_constraints,
4923                      in_size * sizeof(tmp_in_constraints[0]));
4924         /* find and count input and output arguments */
4925         argument = statement->inputs;
4926         for ( ; argument != NULL; argument = argument->next) {
4927                 const char *constraints = argument->constraints.begin;
4928                 asm_constraint_flags_t asm_flags
4929                         = be_parse_asm_constraints(constraints);
4930
4931                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4932                         errorf(&statement->base.source_position,
4933                                "some constraints in '%s' are not supported", constraints);
4934                         continue;
4935                 }
4936                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4937                         errorf(&statement->base.source_position,
4938                                "some constraints in '%s' are invalid", constraints);
4939                         continue;
4940                 }
4941                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4942                         errorf(&statement->base.source_position,
4943                                "write flag specified for input constraints '%s'",
4944                                constraints);
4945                         continue;
4946                 }
4947
4948                 ir_node *input;
4949                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4950                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4951                         /* we can treat this as "normal" input */
4952                         input = expression_to_firm(argument->expression);
4953                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4954                         /* pure memory ops need no input (but we have to make sure we
4955                          * attach to the memory) */
4956                         assert(! (asm_flags &
4957                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4958                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4959                         needs_memory = true;
4960                         input = expression_to_addr(argument->expression);
4961                 } else {
4962                         errorf(&statement->base.source_position,
4963                                "only modifiers but no place set in constraints '%s'",
4964                                constraints);
4965                         continue;
4966                 }
4967
4968                 ir_asm_constraint constraint;
4969                 constraint.pos        = next_pos++;
4970                 constraint.constraint = new_id_from_str(constraints);
4971                 constraint.mode       = get_irn_mode(input);
4972
4973                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4974                 ins[in_size++] = input;
4975         }
4976
4977         ir_node *mem = needs_memory ? get_store() : new_NoMem();
4978         assert(obstack_object_size(&asm_obst)
4979                         == in_size * sizeof(ir_asm_constraint));
4980         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4981
4982         /* create asm node */
4983         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4984
4985         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4986
4987         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4988                                   out_size, output_constraints,
4989                                   n_clobbers, clobbers, asm_text);
4990
4991         if (statement->is_volatile) {
4992                 set_irn_pinned(node, op_pin_state_pinned);
4993         } else {
4994                 set_irn_pinned(node, op_pin_state_floats);
4995         }
4996
4997         /* create output projs & connect them */
4998         if (needs_memory) {
4999                 ir_node *projm = new_Proj(node, mode_M, out_size);
5000                 set_store(projm);
5001         }
5002
5003         size_t i;
5004         for (i = 0; i < out_size; ++i) {
5005                 const expression_t *out_expr = out_exprs[i];
5006                 long                pn       = i;
5007                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5008                 ir_node            *proj     = new_Proj(node, mode, pn);
5009                 ir_node            *addr     = out_addrs[i];
5010
5011                 set_value_for_expression_addr(out_expr, proj, addr);
5012         }
5013
5014         return NULL;
5015 }
5016
5017 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5018 {
5019         statement_to_firm(statement->try_statement);
5020         source_position_t const *const pos = &statement->base.source_position;
5021         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5022         return NULL;
5023 }
5024
5025 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5026 {
5027         errorf(&statement->base.source_position, "__leave not supported yet");
5028         return NULL;
5029 }
5030
5031 /**
5032  * Transform a statement.
5033  */
5034 static ir_node *statement_to_firm(statement_t *const stmt)
5035 {
5036 #ifndef NDEBUG
5037         assert(!stmt->base.transformed);
5038         stmt->base.transformed = true;
5039 #endif
5040
5041         switch (stmt->kind) {
5042         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5043         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5044         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5045         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5046         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5047         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5048         case STATEMENT_EMPTY:         return NULL; /* nothing */
5049         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5050         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5051         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5052         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5053         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5054         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5055         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5056         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5057
5058         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5059         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5060         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5061
5062         case STATEMENT_ERROR: panic("error statement found");
5063         }
5064         panic("statement not implemented");
5065 }
5066
5067 static int count_local_variables(const entity_t *entity,
5068                                  const entity_t *const last)
5069 {
5070         int count = 0;
5071         entity_t const *const end = last != NULL ? last->base.next : NULL;
5072         for (; entity != end; entity = entity->base.next) {
5073                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5074                     !entity->variable.address_taken                                       &&
5075                     is_type_scalar(skip_typeref(entity->declaration.type)))
5076                         ++count;
5077         }
5078         return count;
5079 }
5080
5081 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5082 {
5083         int *const count = env;
5084
5085         switch (stmt->kind) {
5086         case STATEMENT_DECLARATION: {
5087                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5088                 *count += count_local_variables(decl_stmt->declarations_begin,
5089                                 decl_stmt->declarations_end);
5090                 break;
5091         }
5092
5093         case STATEMENT_FOR:
5094                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5095                 break;
5096
5097         default:
5098                 break;
5099         }
5100 }
5101
5102 /**
5103  * Return the number of local (alias free) variables used by a function.
5104  */
5105 static int get_function_n_local_vars(entity_t *entity)
5106 {
5107         const function_t *function = &entity->function;
5108         int count = 0;
5109
5110         /* count parameters */
5111         count += count_local_variables(function->parameters.entities, NULL);
5112
5113         /* count local variables declared in body */
5114         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5115         return count;
5116 }
5117
5118 /**
5119  * Build Firm code for the parameters of a function.
5120  */
5121 static void initialize_function_parameters(entity_t *entity)
5122 {
5123         assert(entity->kind == ENTITY_FUNCTION);
5124         ir_graph *irg             = current_ir_graph;
5125         ir_node  *args            = get_irg_args(irg);
5126         int       n               = 0;
5127         ir_type  *function_irtype;
5128
5129         if (entity->function.need_closure) {
5130                 /* add an extra parameter for the static link */
5131                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5132                 ++n;
5133
5134                 /* Matze: IMO this is wrong, nested functions should have an own
5135                  * type and not rely on strange parameters... */
5136                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5137         } else {
5138                 function_irtype = get_ir_type(entity->declaration.type);
5139         }
5140
5141
5142
5143         entity_t *parameter = entity->function.parameters.entities;
5144         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5145                 if (parameter->kind != ENTITY_PARAMETER)
5146                         continue;
5147
5148                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5149                 type_t *type = skip_typeref(parameter->declaration.type);
5150
5151                 assert(!is_type_array(type));
5152                 bool const needs_entity = parameter->variable.address_taken || is_type_compound(type);
5153
5154                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.source_position);
5155                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5156                 if (needs_entity) {
5157                         ir_type   *frame_type = get_irg_frame_type(irg);
5158                         ir_entity *param
5159                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5160                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5161                         parameter->variable.v.entity = param;
5162                         continue;
5163                 }
5164
5165                 ir_mode *param_mode = get_type_mode(param_irtype);
5166                 long     pn         = n;
5167                 ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5168
5169                 ir_mode *mode = get_ir_mode_storage(type);
5170                 value = create_conv(NULL, value, mode);
5171
5172                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5173                 parameter->variable.v.value_number = next_value_number_function;
5174                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5175                                         parameter);
5176                 ++next_value_number_function;
5177
5178                 set_value(parameter->variable.v.value_number, value);
5179         }
5180 }
5181
5182 /**
5183  * Handle additional decl modifiers for IR-graphs
5184  *
5185  * @param irg            the IR-graph
5186  * @param dec_modifiers  additional modifiers
5187  */
5188 static void handle_decl_modifier_irg(ir_graph *irg,
5189                                      decl_modifiers_t decl_modifiers)
5190 {
5191         if (decl_modifiers & DM_NAKED) {
5192                 /* TRUE if the declaration includes the Microsoft
5193                    __declspec(naked) specifier. */
5194                 add_irg_additional_properties(irg, mtp_property_naked);
5195         }
5196         if (decl_modifiers & DM_FORCEINLINE) {
5197                 /* TRUE if the declaration includes the
5198                    Microsoft __forceinline specifier. */
5199                 set_irg_inline_property(irg, irg_inline_forced);
5200         }
5201         if (decl_modifiers & DM_NOINLINE) {
5202                 /* TRUE if the declaration includes the Microsoft
5203                    __declspec(noinline) specifier. */
5204                 set_irg_inline_property(irg, irg_inline_forbidden);
5205         }
5206 }
5207
5208 static void add_function_pointer(ir_type *segment, ir_entity *method,
5209                                  const char *unique_template)
5210 {
5211         ir_type   *method_type  = get_entity_type(method);
5212         ir_type   *ptr_type     = new_type_pointer(method_type);
5213
5214         /* these entities don't really have a name but firm only allows
5215          * "" in ld_ident.
5216          * Note that we mustn't give these entities a name since for example
5217          * Mach-O doesn't allow them. */
5218         ident     *ide          = id_unique(unique_template);
5219         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5220         ir_graph  *irg          = get_const_code_irg();
5221         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5222                                                            method);
5223
5224         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5225         set_entity_compiler_generated(ptr, 1);
5226         set_entity_visibility(ptr, ir_visibility_private);
5227         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5228         set_atomic_ent_value(ptr, val);
5229 }
5230
5231 /**
5232  * Generate possible IJmp branches to a given label block.
5233  */
5234 static void gen_ijmp_branches(ir_node *block)
5235 {
5236         ir_node *ijmp;
5237         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5238                 add_immBlock_pred(block, ijmp);
5239         }
5240 }
5241
5242 /**
5243  * Create code for a function and all inner functions.
5244  *
5245  * @param entity  the function entity
5246  */
5247 static void create_function(entity_t *entity)
5248 {
5249         assert(entity->kind == ENTITY_FUNCTION);
5250         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5251
5252         if (entity->function.statement == NULL)
5253                 return;
5254
5255         inner_functions     = NULL;
5256         current_trampolines = NULL;
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         current_ir_graph = irg;
5278
5279         ir_graph *old_current_function = current_function;
5280         current_function = irg;
5281
5282         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5283         current_vararg_entity = NULL;
5284
5285         set_irg_fp_model(irg, firm_fp_model);
5286         tarval_enable_fp_ops(1);
5287         set_irn_dbg_info(get_irg_start_block(irg),
5288                          get_entity_dbg_info(function_entity));
5289
5290         /* set inline flags */
5291         if (entity->function.is_inline)
5292                 set_irg_inline_property(irg, irg_inline_recomended);
5293         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5294
5295         next_value_number_function = 0;
5296         initialize_function_parameters(entity);
5297         current_static_link = entity->function.static_link;
5298
5299         statement_to_firm(entity->function.statement);
5300
5301         ir_node *end_block = get_irg_end_block(irg);
5302
5303         /* do we have a return statement yet? */
5304         if (currently_reachable()) {
5305                 type_t *type = skip_typeref(entity->declaration.type);
5306                 assert(is_type_function(type));
5307                 type_t *const return_type = skip_typeref(type->function.return_type);
5308
5309                 ir_node *ret;
5310                 if (is_type_void(return_type)) {
5311                         ret = new_Return(get_store(), 0, NULL);
5312                 } else {
5313                         ir_mode *const mode = get_ir_mode_storage(return_type);
5314
5315                         ir_node *in[1];
5316                         /* §5.1.2.2.3 main implicitly returns 0 */
5317                         if (is_main(entity)) {
5318                                 in[0] = new_Const(get_mode_null(mode));
5319                         } else {
5320                                 in[0] = new_Unknown(mode);
5321                         }
5322                         ret = new_Return(get_store(), 1, in);
5323                 }
5324                 add_immBlock_pred(end_block, ret);
5325         }
5326
5327         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5328                 label_t *label = all_labels[i];
5329                 if (label->address_taken) {
5330                         gen_ijmp_branches(label->block);
5331                 }
5332                 mature_immBlock(label->block);
5333         }
5334
5335         DEL_ARR_F(all_labels);
5336         all_labels = NULL;
5337
5338         irg_finalize_cons(irg);
5339
5340         /* finalize the frame type */
5341         ir_type *frame_type = get_irg_frame_type(irg);
5342         int      n          = get_compound_n_members(frame_type);
5343         int      align_all  = 4;
5344         int      offset     = 0;
5345         for (int i = 0; i < n; ++i) {
5346                 ir_entity *member      = get_compound_member(frame_type, i);
5347                 ir_type   *entity_type = get_entity_type(member);
5348
5349                 int align = get_type_alignment_bytes(entity_type);
5350                 if (align > align_all)
5351                         align_all = align;
5352                 int misalign = 0;
5353                 if (align > 0) {
5354                         misalign  = offset % align;
5355                         if (misalign > 0) {
5356                                 offset += align - misalign;
5357                         }
5358                 }
5359
5360                 set_entity_offset(member, offset);
5361                 offset += get_type_size_bytes(entity_type);
5362         }
5363         set_type_size_bytes(frame_type, offset);
5364         set_type_alignment_bytes(frame_type, align_all);
5365
5366         irg_verify(irg, VERIFY_ENFORCE_SSA);
5367         current_vararg_entity = old_current_vararg_entity;
5368         current_function      = old_current_function;
5369
5370         if (current_trampolines != NULL) {
5371                 DEL_ARR_F(current_trampolines);
5372                 current_trampolines = NULL;
5373         }
5374
5375         /* create inner functions if any */
5376         entity_t **inner = inner_functions;
5377         if (inner != NULL) {
5378                 ir_type *rem_outer_frame      = current_outer_frame;
5379                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5380                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5381                         create_function(inner[i]);
5382                 }
5383                 DEL_ARR_F(inner);
5384
5385                 current_outer_frame      = rem_outer_frame;
5386         }
5387 }
5388
5389 static void scope_to_firm(scope_t *scope)
5390 {
5391         /* first pass: create declarations */
5392         entity_t *entity = scope->entities;
5393         for ( ; entity != NULL; entity = entity->base.next) {
5394                 if (entity->base.symbol == NULL)
5395                         continue;
5396
5397                 if (entity->kind == ENTITY_FUNCTION) {
5398                         if (entity->function.btk != BUILTIN_NONE) {
5399                                 /* builtins have no representation */
5400                                 continue;
5401                         }
5402                         (void)get_function_entity(entity, NULL);
5403                 } else if (entity->kind == ENTITY_VARIABLE) {
5404                         create_global_variable(entity);
5405                 } else if (entity->kind == ENTITY_NAMESPACE) {
5406                         scope_to_firm(&entity->namespacee.members);
5407                 }
5408         }
5409
5410         /* second pass: create code/initializers */
5411         entity = scope->entities;
5412         for ( ; entity != NULL; entity = entity->base.next) {
5413                 if (entity->base.symbol == NULL)
5414                         continue;
5415
5416                 if (entity->kind == ENTITY_FUNCTION) {
5417                         if (entity->function.btk != BUILTIN_NONE) {
5418                                 /* builtins have no representation */
5419                                 continue;
5420                         }
5421                         create_function(entity);
5422                 } else if (entity->kind == ENTITY_VARIABLE) {
5423                         assert(entity->declaration.kind
5424                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5425                         current_ir_graph = get_const_code_irg();
5426                         create_variable_initializer(entity);
5427                 }
5428         }
5429 }
5430
5431 void init_ast2firm(void)
5432 {
5433         obstack_init(&asm_obst);
5434         init_atomic_modes();
5435
5436         ir_set_debug_retrieve(dbg_retrieve);
5437         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5438
5439         /* create idents for all known runtime functions */
5440         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5441                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5442         }
5443
5444         entitymap_init(&entitymap);
5445 }
5446
5447 static void init_ir_types(void)
5448 {
5449         static int ir_types_initialized = 0;
5450         if (ir_types_initialized)
5451                 return;
5452         ir_types_initialized = 1;
5453
5454         ir_type_char    = get_ir_type(type_char);
5455         ir_type_wchar_t = get_ir_type(type_wchar_t);
5456
5457         be_params             = be_get_backend_param();
5458         mode_float_arithmetic = be_params->mode_float_arithmetic;
5459
5460         stack_param_align     = be_params->stack_param_align;
5461 }
5462
5463 void exit_ast2firm(void)
5464 {
5465         entitymap_destroy(&entitymap);
5466         obstack_free(&asm_obst, NULL);
5467 }
5468
5469 static void global_asm_to_firm(statement_t *s)
5470 {
5471         for (; s != NULL; s = s->base.next) {
5472                 assert(s->kind == STATEMENT_ASM);
5473
5474                 char const *const text = s->asms.asm_text.begin;
5475                 size_t      const size = s->asms.asm_text.size;
5476                 ident      *const id   = new_id_from_chars(text, size);
5477                 add_irp_asm(id);
5478         }
5479 }
5480
5481 static const char *get_cwd(void)
5482 {
5483         static char buf[1024];
5484         if (buf[0] == '\0') {
5485                 return getcwd(buf, sizeof(buf));
5486         }
5487         return buf;
5488 }
5489
5490 void translation_unit_to_firm(translation_unit_t *unit)
5491 {
5492         if (c_mode & _CXX) {
5493                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5494         } else if (c_mode & _C99) {
5495                 be_dwarf_set_source_language(DW_LANG_C99);
5496         } else if (c_mode & _C89) {
5497                 be_dwarf_set_source_language(DW_LANG_C89);
5498         } else {
5499                 be_dwarf_set_source_language(DW_LANG_C);
5500         }
5501         const char *cwd = get_cwd();
5502         if (cwd != NULL) {
5503                 be_dwarf_set_compilation_directory(cwd);
5504         }
5505
5506         /* initialize firm arithmetic */
5507         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5508         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5509
5510         /* just to be sure */
5511         continue_label           = NULL;
5512         break_label              = NULL;
5513         current_switch           = NULL;
5514         current_translation_unit = unit;
5515
5516         init_ir_types();
5517
5518         scope_to_firm(&unit->scope);
5519         global_asm_to_firm(unit->global_asm);
5520
5521         current_ir_graph         = NULL;
5522         current_translation_unit = NULL;
5523 }