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_const_char;
  67 static ir_type *ir_type_wchar_t;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int        next_value_number_function;
  76 static ir_node   *continue_label;
  77 static ir_node   *break_label;
  78 static ir_node   *current_switch;
  79 static bool       saw_default_label;
  80 static label_t  **all_labels;
  81 static entity_t **inner_functions;
  82 static ir_node   *ijmp_list;
  83 static bool       constant_folding;
  84
  85 static const entity_t     *current_function_entity;
  86 static ir_node            *current_function_name;
  87 static ir_node            *current_funcsig;
  88 static ir_graph           *current_function;
  89 static translation_unit_t *current_translation_unit;
  90 static trampoline_region  *current_trampolines;
  91 static ir_type            *current_outer_frame;
  92 static ir_node            *current_static_link;
  93 static ir_entity          *current_vararg_entity;
  94
  95 static entitymap_t  entitymap;
  96
  97 static struct obstack asm_obst;
  98
  99 typedef enum declaration_kind_t {
 100         DECLARATION_KIND_UNKNOWN,
 101         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 102         DECLARATION_KIND_GLOBAL_VARIABLE,
 103         DECLARATION_KIND_LOCAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 105         DECLARATION_KIND_PARAMETER,
 106         DECLARATION_KIND_PARAMETER_ENTITY,
 107         DECLARATION_KIND_FUNCTION,
 108         DECLARATION_KIND_COMPOUND_MEMBER,
 109         DECLARATION_KIND_INNER_FUNCTION
 110 } declaration_kind_t;
 111
 112 static ir_type *get_ir_type_incomplete(type_t *type);
 113
 114 static void enqueue_inner_function(entity_t *entity)
 115 {
 116         if (inner_functions == NULL)
 117                 inner_functions = NEW_ARR_F(entity_t *, 0);
 118         ARR_APP1(entity_t*, inner_functions, entity);
 119 }
 120
 121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 122 {
 123         const entity_t *entity = get_irg_loc_description(irg, pos);
 124
 125         if (entity != NULL) {
 126                 source_position_t const *const pos = &entity->base.source_position;
 127                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 128         }
 129         return new_r_Unknown(irg, mode);
 130 }
 131
 132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 133 {
 134         source_position_t const *const pos = (source_position_t const*)dbg;
 135         if (pos) {
 136                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 137         } else {
 138                 return (src_loc_t){ NULL, 0, 0 };
 139         }
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 148                                     const type_dbg_info *dbg)
 149 {
 150         assert(dbg != NULL);
 151         print_to_buffer(buffer, buffer_size);
 152         const type_t *type = (const type_t*) dbg;
 153         print_type(type);
 154         finish_print_to_buffer();
 155 }
 156
 157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 158 {
 159         return (type_dbg_info*) type;
 160 }
 161
 162 /* is the current block a reachable one? */
 163 static bool currently_reachable(void)
 164 {
 165         ir_node *const block = get_cur_block();
 166         return block != NULL && !is_Bad(block);
 167 }
 168
 169 static void set_unreachable_now(void)
 170 {
 171         set_cur_block(NULL);
 172 }
 173
 174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 175
 176 static ir_node *_expression_to_firm(const expression_t *expression);
 177 static ir_node *expression_to_firm(const expression_t *expression);
 178
 179 static unsigned decide_modulo_shift(unsigned type_size)
 180 {
 181         if (architecture_modulo_shift == 0)
 182                 return 0;
 183         if (type_size < architecture_modulo_shift)
 184                 return architecture_modulo_shift;
 185         return type_size;
 186 }
 187
 188 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 189 {
 190         unsigned flags = get_atomic_type_flags(kind);
 191         unsigned size  = get_atomic_type_size(kind);
 192         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 193             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 194                 if (size == 4) {
 195                         return get_modeF();
 196                 } else if (size == 8) {
 197                         return get_modeD();
 198                 } else {
 199                         panic("unexpected kind");
 200                 }
 201         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 202                 char            name[64];
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 206
 207                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 208                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 209                                     modulo_shift);
 210         }
 211
 212         return NULL;
 213 }
 214
 215 /**
 216  * Initialises the atomic modes depending on the machine size.
 217  */
 218 static void init_atomic_modes(void)
 219 {
 220         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 221         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 222                 if (atomic_modes[i] != NULL)
 223                         continue;
 224                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 225         }
 226 }
 227
 228 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 229 {
 230         assert(kind <= ATOMIC_TYPE_LAST);
 231         return atomic_modes[kind];
 232 }
 233
 234 static ir_node *get_vla_size(array_type_t *const type)
 235 {
 236         ir_node *size_node = type->size_node;
 237         if (size_node == NULL) {
 238                 size_node = expression_to_firm(type->size_expression);
 239                 type->size_node = size_node;
 240         }
 241         return size_node;
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256 /**
 257  * Creates a Firm type for an atomic type
 258  */
 259 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 260 {
 261         ir_mode        *mode      = atomic_modes[akind];
 262         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 263         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 264         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 265
 266         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 267         set_type_alignment_bytes(irtype, alignment);
 268
 269         return irtype;
 270 }
 271
 272 /**
 273  * Creates a Firm type for a complex type
 274  */
 275 static ir_type *create_complex_type(const atomic_type_t *type)
 276 {
 277         atomic_type_kind_t  kind = type->akind;
 278         ir_mode            *mode = atomic_modes[kind];
 279         ident              *id   = get_mode_ident(mode);
 280
 281         (void) id;
 282
 283         /* FIXME: finish the array */
 284         return NULL;
 285 }
 286
 287 /**
 288  * Creates a Firm type for an imaginary type
 289  */
 290 static ir_type *create_imaginary_type(const atomic_type_t *type)
 291 {
 292         return create_atomic_type(type->akind, (const type_t*)type);
 293 }
 294
 295 /**
 296  * return type of a parameter (and take transparent union gnu extension into
 297  * account)
 298  */
 299 static type_t *get_parameter_type(type_t *orig_type)
 300 {
 301         type_t *type = skip_typeref(orig_type);
 302         if (is_type_union(type)
 303                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 304                 compound_t *compound = type->compound.compound;
 305                 type                 = compound->members.entities->declaration.type;
 306         }
 307
 308         return type;
 309 }
 310
 311 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 312 {
 313         type_t        *return_type  = skip_typeref(function_type->return_type);
 314
 315         int            n_parameters = count_parameters(function_type)
 316                                        + (for_closure ? 1 : 0);
 317         int            n_results    = is_type_void(return_type) ? 0 : 1;
 318         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 319         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 320
 321         if (!is_type_void(return_type)) {
 322                 ir_type *restype = get_ir_type(return_type);
 323                 set_method_res_type(irtype, 0, restype);
 324         }
 325
 326         function_parameter_t *parameter = function_type->parameters;
 327         int                   n         = 0;
 328         if (for_closure) {
 329                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 330                 set_method_param_type(irtype, n, p_irtype);
 331                 ++n;
 332         }
 333         for ( ; parameter != NULL; parameter = parameter->next) {
 334                 type_t  *type     = get_parameter_type(parameter->type);
 335                 ir_type *p_irtype = get_ir_type(type);
 336                 set_method_param_type(irtype, n, p_irtype);
 337                 ++n;
 338         }
 339
 340         bool is_variadic = function_type->variadic;
 341
 342         if (is_variadic)
 343                 set_method_variadicity(irtype, variadicity_variadic);
 344
 345         unsigned cc = get_method_calling_convention(irtype);
 346         switch (function_type->calling_convention) {
 347         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 348         case CC_CDECL:
 349 is_cdecl:
 350                 set_method_calling_convention(irtype, SET_CDECL(cc));
 351                 break;
 352
 353         case CC_STDCALL:
 354                 if (is_variadic)
 355                         goto is_cdecl;
 356
 357                 /* only non-variadic function can use stdcall, else use cdecl */
 358                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 359                 break;
 360
 361         case CC_FASTCALL:
 362                 if (is_variadic)
 363                         goto is_cdecl;
 364                 /* only non-variadic function can use fastcall, else use cdecl */
 365                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 366                 break;
 367
 368         case CC_THISCALL:
 369                 /* Hmm, leave default, not accepted by the parser yet. */
 370                 break;
 371         }
 372
 373         if (for_closure)
 374                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 375
 376         const decl_modifiers_t modifiers = function_type->modifiers;
 377         if (modifiers & DM_CONST)
 378                 add_method_additional_properties(irtype, mtp_property_const);
 379         if (modifiers & DM_PURE)
 380                 add_method_additional_properties(irtype, mtp_property_pure);
 381         if (modifiers & DM_RETURNS_TWICE)
 382                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 383         if (modifiers & DM_NORETURN)
 384                 add_method_additional_properties(irtype, mtp_property_noreturn);
 385         if (modifiers & DM_NOTHROW)
 386                 add_method_additional_properties(irtype, mtp_property_nothrow);
 387         if (modifiers & DM_MALLOC)
 388                 add_method_additional_properties(irtype, mtp_property_malloc);
 389
 390         return irtype;
 391 }
 392
 393 static ir_type *create_pointer_type(pointer_type_t *type)
 394 {
 395         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 396         type_t        *points_to    = type->points_to;
 397         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 398         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 399
 400         return irtype;
 401 }
 402
 403 static ir_type *create_reference_type(reference_type_t *type)
 404 {
 405         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 406         type_t        *refers_to    = type->refers_to;
 407         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 408         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 409
 410         return irtype;
 411 }
 412
 413 static ir_type *create_array_type(array_type_t *type)
 414 {
 415         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 416         type_t        *element_type    = type->element_type;
 417         ir_type       *ir_element_type = get_ir_type(element_type);
 418         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 419
 420         const int align = get_type_alignment_bytes(ir_element_type);
 421         set_type_alignment_bytes(irtype, align);
 422
 423         if (type->size_constant) {
 424                 int n_elements = type->size;
 425
 426                 set_array_bounds_int(irtype, 0, 0, n_elements);
 427
 428                 size_t elemsize = get_type_size_bytes(ir_element_type);
 429                 if (elemsize % align > 0) {
 430                         elemsize += align - (elemsize % align);
 431                 }
 432                 set_type_size_bytes(irtype, n_elements * elemsize);
 433         } else {
 434                 set_array_lower_bound_int(irtype, 0, 0);
 435         }
 436         set_type_state(irtype, layout_fixed);
 437
 438         return irtype;
 439 }
 440
 441 /**
 442  * Return the signed integer type of size bits.
 443  *
 444  * @param size   the size
 445  */
 446 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 447                                                  unsigned size,
 448                                                                                                  const type_t *type)
 449 {
 450         static ir_mode *s_modes[64 + 1] = {NULL, };
 451         ir_type *res;
 452         ir_mode *mode;
 453
 454         if (size <= 0 || size > 64)
 455                 return NULL;
 456
 457         mode = s_modes[size];
 458         if (mode == NULL) {
 459                 char name[32];
 460
 461                 snprintf(name, sizeof(name), "bf_I%u", size);
 462                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 463                 s_modes[size] = mode;
 464         }
 465
 466         type_dbg_info *dbgi = get_type_dbg_info_(type);
 467         res                 = new_d_type_primitive(mode, dbgi);
 468         set_primitive_base_type(res, base_tp);
 469
 470         return res;
 471 }
 472
 473 /**
 474  * Return the unsigned integer type of size bits.
 475  *
 476  * @param size   the size
 477  */
 478 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 479                                                    unsigned size,
 480                                                                                                    const type_t *type)
 481 {
 482         static ir_mode *u_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = u_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_U%u", size);
 494                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 495                 u_modes[size] = mode;
 496         }
 497
 498         type_dbg_info *dbgi = get_type_dbg_info_(type);
 499         res = new_d_type_primitive(mode, dbgi);
 500         set_primitive_base_type(res, base_tp);
 501
 502         return res;
 503 }
 504
 505 static ir_type *create_bitfield_type(const entity_t *entity)
 506 {
 507         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 508         type_t *base = skip_typeref(entity->declaration.type);
 509         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 510         ir_type *irbase = get_ir_type(base);
 511
 512         unsigned bit_size = entity->compound_member.bit_size;
 513
 514         assert(!is_type_float(base));
 515         if (is_type_signed(base)) {
 516                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 517         } else {
 518                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 519         }
 520 }
 521
 522 /**
 523  * Construct firm type from ast struct type.
 524  */
 525 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 526 {
 527         compound_t *compound = type->compound;
 528
 529         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 530                 return compound->irtype;
 531         }
 532
 533         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 534
 535         symbol_t *type_symbol = compound->base.symbol;
 536         ident    *id;
 537         if (type_symbol != NULL) {
 538                 id = new_id_from_str(type_symbol->string);
 539         } else {
 540                 if (is_union) {
 541                         id = id_unique("__anonymous_union.%u");
 542                 } else {
 543                         id = id_unique("__anonymous_struct.%u");
 544                 }
 545         }
 546
 547         ir_type *irtype;
 548         if (is_union) {
 549                 irtype = new_type_union(id);
 550         } else {
 551                 irtype = new_type_struct(id);
 552         }
 553
 554         compound->irtype_complete = false;
 555         compound->irtype          = irtype;
 556
 557         if (incomplete)
 558                 return irtype;
 559
 560         if (is_union) {
 561                 layout_union_type(type);
 562         } else {
 563                 layout_struct_type(type);
 564         }
 565
 566         compound->irtype_complete = true;
 567
 568         entity_t *entry = compound->members.entities;
 569         for ( ; entry != NULL; entry = entry->base.next) {
 570                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 571                         continue;
 572
 573                 symbol_t *symbol     = entry->base.symbol;
 574                 type_t   *entry_type = entry->declaration.type;
 575                 ident    *ident;
 576                 if (symbol == NULL) {
 577                         /* anonymous bitfield member, skip */
 578                         if (entry->compound_member.bitfield)
 579                                 continue;
 580                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 581                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 582                         ident = id_unique("anon.%u");
 583                 } else {
 584                         ident = new_id_from_str(symbol->string);
 585                 }
 586
 587                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 588
 589                 ir_type *entry_irtype;
 590                 if (entry->compound_member.bitfield) {
 591                         entry_irtype = create_bitfield_type(entry);
 592                 } else {
 593                         entry_irtype = get_ir_type(entry_type);
 594                 }
 595                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 596
 597                 set_entity_offset(entity, entry->compound_member.offset);
 598                 set_entity_offset_bits_remainder(entity,
 599                                                  entry->compound_member.bit_offset);
 600
 601                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 602                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 603                 entry->compound_member.entity = entity;
 604         }
 605
 606         set_type_alignment_bytes(irtype, compound->alignment);
 607         set_type_size_bytes(irtype, compound->size);
 608         set_type_state(irtype, layout_fixed);
 609
 610         return irtype;
 611 }
 612
 613 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 614
 615 static void determine_enum_values(enum_type_t *const type)
 616 {
 617         ir_mode   *const mode    = atomic_modes[type->base.akind];
 618         ir_tarval *const one     = get_mode_one(mode);
 619         ir_tarval *      tv_next = get_mode_null(mode);
 620
 621         enum_t   *enume = type->enume;
 622         entity_t *entry = enume->base.next;
 623         for (; entry != NULL; entry = entry->base.next) {
 624                 if (entry->kind != ENTITY_ENUM_VALUE)
 625                         break;
 626
 627                 expression_t *const init = entry->enum_value.value;
 628                 if (init != NULL) {
 629                         tv_next = fold_constant_to_tarval(init);
 630                 }
 631                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 632                 entry->enum_value.tv = tv_next;
 633                 tv_next = tarval_add(tv_next, one);
 634         }
 635 }
 636
 637 static ir_type *create_enum_type(enum_type_t *const type)
 638 {
 639         return create_atomic_type(type->base.akind, (const type_t*) type);
 640 }
 641
 642 static ir_type *get_ir_type_incomplete(type_t *type)
 643 {
 644         assert(type != NULL);
 645         type = skip_typeref(type);
 646
 647         if (type->base.firm_type != NULL) {
 648                 return type->base.firm_type;
 649         }
 650
 651         if (is_type_compound(type)) {
 652                 return create_compound_type(&type->compound, true);
 653         } else {
 654                 return get_ir_type(type);
 655         }
 656 }
 657
 658 ir_type *get_ir_type(type_t *type)
 659 {
 660         assert(type != NULL);
 661
 662         type = skip_typeref(type);
 663
 664         if (type->base.firm_type != NULL) {
 665                 return type->base.firm_type;
 666         }
 667
 668         ir_type *firm_type = NULL;
 669         switch (type->kind) {
 670         case TYPE_ATOMIC:
 671                 firm_type = create_atomic_type(type->atomic.akind, type);
 672                 break;
 673         case TYPE_COMPLEX:
 674                 firm_type = create_complex_type(&type->atomic);
 675                 break;
 676         case TYPE_IMAGINARY:
 677                 firm_type = create_imaginary_type(&type->atomic);
 678                 break;
 679         case TYPE_FUNCTION:
 680                 firm_type = create_method_type(&type->function, false);
 681                 break;
 682         case TYPE_POINTER:
 683                 firm_type = create_pointer_type(&type->pointer);
 684                 break;
 685         case TYPE_REFERENCE:
 686                 firm_type = create_reference_type(&type->reference);
 687                 break;
 688         case TYPE_ARRAY:
 689                 firm_type = create_array_type(&type->array);
 690                 break;
 691         case TYPE_COMPOUND_STRUCT:
 692         case TYPE_COMPOUND_UNION:
 693                 firm_type = create_compound_type(&type->compound, false);
 694                 break;
 695         case TYPE_ENUM:
 696                 firm_type = create_enum_type(&type->enumt);
 697                 break;
 698
 699         case TYPE_ERROR:
 700         case TYPE_TYPEOF:
 701         case TYPE_TYPEDEF:
 702                 break;
 703         }
 704         if (firm_type == NULL)
 705                 panic("unknown type found");
 706
 707         type->base.firm_type = firm_type;
 708         return firm_type;
 709 }
 710
 711 static ir_mode *get_ir_mode_storage(type_t *type)
 712 {
 713         type = skip_typeref(type);
 714
 715         /* Firm doesn't report a mode for arrays and structs/unions. */
 716         if (!is_type_scalar(type)) {
 717                 return mode_P_data;
 718         }
 719
 720         ir_type *const irtype = get_ir_type(type);
 721         ir_mode *const mode   = get_type_mode(irtype);
 722         assert(mode != NULL);
 723         return mode;
 724 }
 725
 726 /*
 727  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 728  * int that it returns bigger modes for floating point on some platforms
 729  * (x87 internally does arithemtic with 80bits)
 730  */
 731 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 732 {
 733         ir_mode *mode = get_ir_mode_storage(type);
 734         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 735                 return mode_float_arithmetic;
 736         }
 737
 738         return mode;
 739 }
 740
 741 /**
 742  * Return a node representing the size of a type.
 743  */
 744 static ir_node *get_type_size_node(type_t *type)
 745 {
 746         unsigned size;
 747         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 748         type = skip_typeref(type);
 749
 750         if (is_type_array(type) && type->array.is_vla) {
 751                 ir_node *size_node = get_vla_size(&type->array);
 752                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 753                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 754                 return real_size;
 755         }
 756
 757         size = get_type_size(type);
 758         return new_Const_long(mode, size);
 759 }
 760
 761 /** Names of the runtime functions. */
 762 static const struct {
 763         int        id;           /**< the rts id */
 764         int        n_res;        /**< number of return values */
 765         const char *name;        /**< the name of the rts function */
 766         int        n_params;     /**< number of parameters */
 767         unsigned   flags;        /**< language flags */
 768 } rts_data[] = {
 769         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 770         { rts_abort,      0, "abort",        0, _C89 },
 771         { rts_alloca,     1, "alloca",       1, _ALL },
 772         { rts_abs,        1, "abs",          1, _C89 },
 773         { rts_labs,       1, "labs",         1, _C89 },
 774         { rts_llabs,      1, "llabs",        1, _C99 },
 775         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 776
 777         { rts_fabs,       1, "fabs",         1, _C89 },
 778         { rts_sqrt,       1, "sqrt",         1, _C89 },
 779         { rts_cbrt,       1, "cbrt",         1, _C99 },
 780         { rts_exp,        1, "exp",          1, _C89 },
 781         { rts_exp2,       1, "exp2",         1, _C89 },
 782         { rts_exp10,      1, "exp10",        1, _GNUC },
 783         { rts_log,        1, "log",          1, _C89 },
 784         { rts_log2,       1, "log2",         1, _C89 },
 785         { rts_log10,      1, "log10",        1, _C89 },
 786         { rts_pow,        1, "pow",          2, _C89 },
 787         { rts_sin,        1, "sin",          1, _C89 },
 788         { rts_cos,        1, "cos",          1, _C89 },
 789         { rts_tan,        1, "tan",          1, _C89 },
 790         { rts_asin,       1, "asin",         1, _C89 },
 791         { rts_acos,       1, "acos",         1, _C89 },
 792         { rts_atan,       1, "atan",         1, _C89 },
 793         { rts_sinh,       1, "sinh",         1, _C89 },
 794         { rts_cosh,       1, "cosh",         1, _C89 },
 795         { rts_tanh,       1, "tanh",         1, _C89 },
 796
 797         { rts_fabsf,      1, "fabsf",        1, _C99 },
 798         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 799         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 800         { rts_expf,       1, "expf",         1, _C99 },
 801         { rts_exp2f,      1, "exp2f",        1, _C99 },
 802         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 803         { rts_logf,       1, "logf",         1, _C99 },
 804         { rts_log2f,      1, "log2f",        1, _C99 },
 805         { rts_log10f,     1, "log10f",       1, _C99 },
 806         { rts_powf,       1, "powf",         2, _C99 },
 807         { rts_sinf,       1, "sinf",         1, _C99 },
 808         { rts_cosf,       1, "cosf",         1, _C99 },
 809         { rts_tanf,       1, "tanf",         1, _C99 },
 810         { rts_asinf,      1, "asinf",        1, _C99 },
 811         { rts_acosf,      1, "acosf",        1, _C99 },
 812         { rts_atanf,      1, "atanf",        1, _C99 },
 813         { rts_sinhf,      1, "sinhf",        1, _C99 },
 814         { rts_coshf,      1, "coshf",        1, _C99 },
 815         { rts_tanhf,      1, "tanhf",        1, _C99 },
 816
 817         { rts_fabsl,      1, "fabsl",        1, _C99 },
 818         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 819         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 820         { rts_expl,       1, "expl",         1, _C99 },
 821         { rts_exp2l,      1, "exp2l",        1, _C99 },
 822         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 823         { rts_logl,       1, "logl",         1, _C99 },
 824         { rts_log2l,      1, "log2l",        1, _C99 },
 825         { rts_log10l,     1, "log10l",       1, _C99 },
 826         { rts_powl,       1, "powl",         2, _C99 },
 827         { rts_sinl,       1, "sinl",         1, _C99 },
 828         { rts_cosl,       1, "cosl",         1, _C99 },
 829         { rts_tanl,       1, "tanl",         1, _C99 },
 830         { rts_asinl,      1, "asinl",        1, _C99 },
 831         { rts_acosl,      1, "acosl",        1, _C99 },
 832         { rts_atanl,      1, "atanl",        1, _C99 },
 833         { rts_sinhl,      1, "sinhl",        1, _C99 },
 834         { rts_coshl,      1, "coshl",        1, _C99 },
 835         { rts_tanhl,      1, "tanhl",        1, _C99 },
 836
 837         { rts_strcmp,     1, "strcmp",       2, _C89 },
 838         { rts_strncmp,    1, "strncmp",      3, _C89 },
 839         { rts_strcpy,     1, "strcpy",       2, _C89 },
 840         { rts_strlen,     1, "strlen",       1, _C89 },
 841         { rts_memcpy,     1, "memcpy",       3, _C89 },
 842         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 843         { rts_memmove,    1, "memmove",      3, _C89 },
 844         { rts_memset,     1, "memset",       3, _C89 },
 845         { rts_memcmp,     1, "memcmp",       3, _C89 },
 846 };
 847
 848 static ident *rts_idents[lengthof(rts_data)];
 849
 850 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 851
 852 void set_create_ld_ident(ident *(*func)(entity_t*))
 853 {
 854         create_ld_ident = func;
 855 }
 856
 857 /**
 858  * Handle GNU attributes for entities
 859  *
 860  * @param ent   the entity
 861  * @param decl  the routine declaration
 862  */
 863 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 864 {
 865         assert(is_declaration(entity));
 866         decl_modifiers_t modifiers = entity->declaration.modifiers;
 867
 868         if (is_method_entity(irentity)) {
 869                 if (modifiers & DM_PURE) {
 870                         set_entity_additional_properties(irentity, mtp_property_pure);
 871                 }
 872                 if (modifiers & DM_CONST) {
 873                         add_entity_additional_properties(irentity, mtp_property_const);
 874                 }
 875         }
 876         if (modifiers & DM_USED) {
 877                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 878         }
 879         if (modifiers & DM_WEAK) {
 880                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 881         }
 882 }
 883
 884 static bool is_main(entity_t *entity)
 885 {
 886         static symbol_t *sym_main = NULL;
 887         if (sym_main == NULL) {
 888                 sym_main = symbol_table_insert("main");
 889         }
 890
 891         if (entity->base.symbol != sym_main)
 892                 return false;
 893         /* must be in outermost scope */
 894         if (entity->base.parent_scope != &current_translation_unit->scope)
 895                 return false;
 896
 897         return true;
 898 }
 899
 900 /**
 901  * Creates an entity representing a function.
 902  *
 903  * @param entity       the function declaration/definition
 904  * @param owner_type   the owner type of this function, NULL
 905  *                     for global functions
 906  */
 907 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 908 {
 909         assert(entity->kind == ENTITY_FUNCTION);
 910         if (entity->function.irentity != NULL)
 911                 return entity->function.irentity;
 912
 913         switch (entity->function.btk) {
 914         case BUILTIN_NONE:
 915         case BUILTIN_LIBC:
 916         case BUILTIN_LIBC_CHECK:
 917                 break;
 918         default:
 919                 return NULL;
 920         }
 921
 922         if (is_main(entity)) {
 923                 /* force main to C linkage */
 924                 type_t *type = entity->declaration.type;
 925                 assert(is_type_function(type));
 926                 if (type->function.linkage != LINKAGE_C) {
 927                         type_t *new_type           = duplicate_type(type);
 928                         new_type->function.linkage = LINKAGE_C;
 929                         type                       = identify_new_type(new_type);
 930                         entity->declaration.type   = type;
 931                 }
 932         }
 933
 934         symbol_t *symbol = entity->base.symbol;
 935         ident    *id     = new_id_from_str(symbol->string);
 936
 937         /* already an entity defined? */
 938         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 939         bool const has_body = entity->function.statement != NULL;
 940         if (irentity != NULL) {
 941                 if (get_entity_visibility(irentity) == ir_visibility_external
 942                                 && has_body) {
 943                         set_entity_visibility(irentity, ir_visibility_default);
 944                 }
 945                 goto entity_created;
 946         }
 947
 948         ir_type *ir_type_method;
 949         if (entity->function.need_closure)
 950                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 951         else
 952                 ir_type_method = get_ir_type(entity->declaration.type);
 953
 954         bool nested_function = false;
 955         if (owner_type == NULL)
 956                 owner_type = get_glob_type();
 957         else
 958                 nested_function = true;
 959
 960         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 961         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 962
 963         ident *ld_id;
 964         if (nested_function)
 965                 ld_id = id_unique("inner.%u");
 966         else
 967                 ld_id = create_ld_ident(entity);
 968         set_entity_ld_ident(irentity, ld_id);
 969
 970         handle_decl_modifiers(irentity, entity);
 971
 972         if (! nested_function) {
 973                 /* static inline             => local
 974                  * extern inline             => local
 975                  * inline without definition => local
 976                  * inline with definition    => external_visible */
 977                 storage_class_tag_t const storage_class
 978                         = (storage_class_tag_t) entity->declaration.storage_class;
 979                 bool                const is_inline     = entity->function.is_inline;
 980
 981                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
 982                     set_entity_visibility(irentity, ir_visibility_default);
 983                 } else if (storage_class == STORAGE_CLASS_STATIC ||
 984                            (is_inline && has_body)) {
 985                     set_entity_visibility(irentity, ir_visibility_local);
 986                 } else if (has_body) {
 987                     set_entity_visibility(irentity, ir_visibility_default);
 988                 } else {
 989                     set_entity_visibility(irentity, ir_visibility_external);
 990                 }
 991         } else {
 992                 /* nested functions are always local */
 993                 set_entity_visibility(irentity, ir_visibility_local);
 994         }
 995
 996         /* We should check for file scope here, but as long as we compile C only
 997            this is not needed. */
 998         if (!freestanding && !has_body) {
 999                 /* check for a known runtime function */
1000                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1001                         if (id != rts_idents[i])
1002                                 continue;
1003
1004                         function_type_t *function_type
1005                                 = &entity->declaration.type->function;
1006                         /* rts_entities code can't handle a "wrong" number of parameters */
1007                         if (function_type->unspecified_parameters)
1008                                 continue;
1009
1010                         /* check number of parameters */
1011                         int n_params = count_parameters(function_type);
1012                         if (n_params != rts_data[i].n_params)
1013                                 continue;
1014
1015                         type_t *return_type = skip_typeref(function_type->return_type);
1016                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1017                         if (n_res != rts_data[i].n_res)
1018                                 continue;
1019
1020                         /* ignore those rts functions not necessary needed for current mode */
1021                         if ((c_mode & rts_data[i].flags) == 0)
1022                                 continue;
1023                         assert(rts_entities[rts_data[i].id] == NULL);
1024                         rts_entities[rts_data[i].id] = irentity;
1025                 }
1026         }
1027
1028         entitymap_insert(&entitymap, symbol, irentity);
1029
1030 entity_created:
1031         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1032         entity->function.irentity = irentity;
1033
1034         return irentity;
1035 }
1036
1037 /**
1038  * Creates a SymConst for a given entity.
1039  *
1040  * @param dbgi    debug info
1041  * @param entity  the entity
1042  */
1043 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1044 {
1045         assert(entity != NULL);
1046         union symconst_symbol sym;
1047         sym.entity_p = entity;
1048         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1049 }
1050
1051 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1052 {
1053         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1054 }
1055
1056 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1057                                    ir_mode *dest_mode)
1058 {
1059         if (is_Const(value)) {
1060                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1061         }
1062
1063         ir_node *cond       = new_d_Cond(dbgi, value);
1064         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1065         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1066         ir_node *tblock     = new_Block(1, &proj_true);
1067         ir_node *fblock     = new_Block(1, &proj_false);
1068         set_cur_block(tblock);
1069         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1070         ir_node *tjump  = new_Jmp();
1071         set_cur_block(fblock);
1072         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1073         ir_node *fjump  = new_Jmp();
1074
1075         ir_node *in[2]      = { tjump, fjump };
1076         ir_node *mergeblock = new_Block(2, in);
1077         set_cur_block(mergeblock);
1078         ir_node *phi_in[2]  = { const1, const0 };
1079         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1080         return phi;
1081 }
1082
1083 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1084 {
1085         ir_mode *value_mode = get_irn_mode(value);
1086
1087         if (value_mode == dest_mode)
1088                 return value;
1089
1090         if (dest_mode == mode_b) {
1091                 ir_node *zero = new_Const(get_mode_null(value_mode));
1092                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1093                 return cmp;
1094         } else if (value_mode == mode_b) {
1095                 return create_conv_from_b(dbgi, value, dest_mode);
1096         }
1097
1098         return new_d_Conv(dbgi, value, dest_mode);
1099 }
1100
1101 /**
1102  * Creates a SymConst node representing a wide string literal.
1103  *
1104  * @param literal   the wide string literal
1105  */
1106 static ir_node *wide_string_literal_to_firm(
1107                 const string_literal_expression_t *literal)
1108 {
1109         ir_type  *const global_type = get_glob_type();
1110         ir_type  *const elem_type   = ir_type_wchar_t;
1111         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1112         ir_type  *const type        = new_type_array(1, elem_type);
1113
1114         ident     *const id     = id_unique("str.%u");
1115         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1116         set_entity_ld_ident(entity, id);
1117         set_entity_visibility(entity, ir_visibility_private);
1118         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1119
1120         ir_mode      *const mode = get_type_mode(elem_type);
1121         const size_t        slen = wstrlen(&literal->value);
1122
1123         set_array_lower_bound_int(type, 0, 0);
1124         set_array_upper_bound_int(type, 0, slen);
1125         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1126         set_type_state(type, layout_fixed);
1127
1128         ir_initializer_t *initializer = create_initializer_compound(slen);
1129         const char              *p    = literal->value.begin;
1130         for (size_t i = 0; i < slen; ++i) {
1131                 assert(p < literal->value.begin + literal->value.size);
1132                 utf32             v   = read_utf8_char(&p);
1133                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1134                 ir_initializer_t *val = create_initializer_tarval(tv);
1135                 set_initializer_compound_value(initializer, i, val);
1136         }
1137         set_entity_initializer(entity, initializer);
1138
1139         return create_symconst(dbgi, entity);
1140 }
1141
1142 /**
1143  * Creates a SymConst node representing a string constant.
1144  *
1145  * @param src_pos    the source position of the string constant
1146  * @param id_prefix  a prefix for the name of the generated string constant
1147  * @param value      the value of the string constant
1148  */
1149 static ir_node *string_to_firm(const source_position_t *const src_pos,
1150                                const char *const id_prefix,
1151                                const string_t *const value)
1152 {
1153         ir_type  *const global_type = get_glob_type();
1154         dbg_info *const dbgi        = get_dbg_info(src_pos);
1155         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1156
1157         ident     *const id     = id_unique(id_prefix);
1158         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1159         set_entity_ld_ident(entity, id);
1160         set_entity_visibility(entity, ir_visibility_private);
1161         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1162
1163         ir_type *const elem_type = ir_type_const_char;
1164         ir_mode *const mode      = get_type_mode(elem_type);
1165
1166         const char* const string = value->begin;
1167         const size_t      slen   = value->size;
1168
1169         set_array_lower_bound_int(type, 0, 0);
1170         set_array_upper_bound_int(type, 0, slen);
1171         set_type_size_bytes(type, slen);
1172         set_type_state(type, layout_fixed);
1173
1174         ir_initializer_t *initializer = create_initializer_compound(slen);
1175         for (size_t i = 0; i < slen; ++i) {
1176                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1177                 ir_initializer_t *val = create_initializer_tarval(tv);
1178                 set_initializer_compound_value(initializer, i, val);
1179         }
1180         set_entity_initializer(entity, initializer);
1181
1182         return create_symconst(dbgi, entity);
1183 }
1184
1185 static bool try_create_integer(literal_expression_t *literal,
1186                                type_t *type, unsigned char base)
1187 {
1188         const char *string = literal->value.begin;
1189         size_t      size   = literal->value.size;
1190
1191         assert(type->kind == TYPE_ATOMIC);
1192         atomic_type_kind_t akind = type->atomic.akind;
1193
1194         ir_mode   *mode = atomic_modes[akind];
1195         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1196         if (tv == tarval_bad)
1197                 return false;
1198
1199         literal->base.type    = type;
1200         literal->target_value = tv;
1201         return true;
1202 }
1203
1204 static void create_integer_tarval(literal_expression_t *literal)
1205 {
1206         unsigned        us     = 0;
1207         unsigned        ls     = 0;
1208         const string_t *suffix = &literal->suffix;
1209         /* parse suffix */
1210         if (suffix->size > 0) {
1211                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1212                         if (*c == 'u' || *c == 'U') { ++us; }
1213                         if (*c == 'l' || *c == 'L') { ++ls; }
1214                 }
1215         }
1216
1217         unsigned base;
1218         switch (literal->base.kind) {
1219                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1220                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1221                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1222                 default: panic("invalid literal kind");
1223         }
1224
1225         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1226
1227         /* now try if the constant is small enough for some types */
1228         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1229         if (ls < 1) {
1230                 if (us == 0 && try_create_integer(literal, type_int, base))
1231                         goto finished;
1232                 if ((us == 1 || base != 10)
1233                                 && try_create_integer(literal, type_unsigned_int, base))
1234                         goto finished;
1235         }
1236         if (ls < 2) {
1237                 if (us == 0 && try_create_integer(literal, type_long, base))
1238                         goto finished;
1239                 if ((us == 1 || base != 10)
1240                                 && try_create_integer(literal, type_unsigned_long, base))
1241                         goto finished;
1242         }
1243         /* last try? then we should not report tarval_bad */
1244         if (us != 1 && base == 10)
1245                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246         if (us == 0 && try_create_integer(literal, type_long_long, base))
1247                 goto finished;
1248
1249         /* last try */
1250         assert(us == 1 || base != 10);
1251         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1252         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1253         if (!res)
1254                 panic("internal error when parsing number literal");
1255
1256 finished:
1257         tarval_set_integer_overflow_mode(old_mode);
1258 }
1259
1260 void determine_literal_type(literal_expression_t *literal)
1261 {
1262         switch (literal->base.kind) {
1263         case EXPR_LITERAL_INTEGER:
1264         case EXPR_LITERAL_INTEGER_OCTAL:
1265         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1266                 create_integer_tarval(literal);
1267                 return;
1268         default:
1269                 break;
1270         }
1271 }
1272
1273 /**
1274  * Creates a Const node representing a constant.
1275  */
1276 static ir_node *literal_to_firm(const literal_expression_t *literal)
1277 {
1278         type_t     *type   = skip_typeref(literal->base.type);
1279         ir_mode    *mode   = get_ir_mode_storage(type);
1280         const char *string = literal->value.begin;
1281         size_t      size   = literal->value.size;
1282         ir_tarval  *tv;
1283
1284         switch (literal->base.kind) {
1285         case EXPR_LITERAL_WIDE_CHARACTER: {
1286                 utf32  v = read_utf8_char(&string);
1287                 char   buf[128];
1288                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1289
1290                 tv = new_tarval_from_str(buf, len, mode);
1291                 break;
1292         }
1293
1294         case EXPR_LITERAL_CHARACTER: {
1295                 long long int v;
1296                 bool char_is_signed
1297                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1298                 if (size == 1 && char_is_signed) {
1299                         v = (signed char)string[0];
1300                 } else {
1301                         v = 0;
1302                         for (size_t i = 0; i < size; ++i) {
1303                                 v = (v << 8) | ((unsigned char)string[i]);
1304                         }
1305                 }
1306                 char   buf[128];
1307                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1308
1309                 tv = new_tarval_from_str(buf, len, mode);
1310                 break;
1311         }
1312
1313         case EXPR_LITERAL_INTEGER:
1314         case EXPR_LITERAL_INTEGER_OCTAL:
1315         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1316                 assert(literal->target_value != NULL);
1317                 tv = literal->target_value;
1318                 break;
1319
1320         case EXPR_LITERAL_FLOATINGPOINT:
1321                 tv = new_tarval_from_str(string, size, mode);
1322                 break;
1323
1324         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1325                 char buffer[size + 2];
1326                 memcpy(buffer, "0x", 2);
1327                 memcpy(buffer+2, string, size);
1328                 tv = new_tarval_from_str(buffer, size+2, mode);
1329                 break;
1330         }
1331
1332         case EXPR_LITERAL_BOOLEAN:
1333                 if (string[0] == 't') {
1334                         tv = get_mode_one(mode);
1335                 } else {
1336                         assert(string[0] == 'f');
1337         case EXPR_LITERAL_MS_NOOP:
1338                         tv = get_mode_null(mode);
1339                 }
1340                 break;
1341
1342         default:
1343                 panic("Invalid literal kind found");
1344         }
1345
1346         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1347         ir_node  *res        = new_d_Const(dbgi, tv);
1348         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1349         return create_conv(dbgi, res, mode_arith);
1350 }
1351
1352 /*
1353  * Allocate an area of size bytes aligned at alignment
1354  * at a frame type.
1355  */
1356 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1357 {
1358         static unsigned area_cnt = 0;
1359         char buf[32];
1360
1361         ir_type *tp = new_type_array(1, ir_type_char);
1362         set_array_bounds_int(tp, 0, 0, size);
1363         set_type_alignment_bytes(tp, alignment);
1364
1365         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1366         ident *name = new_id_from_str(buf);
1367         ir_entity *area = new_entity(frame_type, name, tp);
1368
1369         /* mark this entity as compiler generated */
1370         set_entity_compiler_generated(area, 1);
1371         return area;
1372 }
1373
1374 /**
1375  * Return a node representing a trampoline region
1376  * for a given function entity.
1377  *
1378  * @param dbgi    debug info
1379  * @param entity  the function entity
1380  */
1381 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1382 {
1383         ir_entity *region = NULL;
1384         int        i;
1385
1386         if (current_trampolines != NULL) {
1387                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1388                         if (current_trampolines[i].function == entity) {
1389                                 region = current_trampolines[i].region;
1390                                 break;
1391                         }
1392                 }
1393         } else {
1394                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1395         }
1396         ir_graph *irg = current_ir_graph;
1397         if (region == NULL) {
1398                 /* create a new region */
1399                 ir_type           *frame_tp = get_irg_frame_type(irg);
1400                 trampoline_region  reg;
1401                 reg.function = entity;
1402
1403                 reg.region   = alloc_trampoline(frame_tp,
1404                                                 be_params->trampoline_size,
1405                                                 be_params->trampoline_align);
1406                 ARR_APP1(trampoline_region, current_trampolines, reg);
1407                 region = reg.region;
1408         }
1409         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1410                                region);
1411 }
1412
1413 /**
1414  * Creates a trampoline for a function represented by an entity.
1415  *
1416  * @param dbgi    debug info
1417  * @param mode    the (reference) mode for the function address
1418  * @param entity  the function entity
1419  */
1420 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1421                                   ir_entity *entity)
1422 {
1423         assert(entity != NULL);
1424         ir_node *in[3];
1425         in[0] = get_trampoline_region(dbgi, entity);
1426         in[1] = create_symconst(dbgi, entity);
1427         in[2] = get_irg_frame(current_ir_graph);
1428
1429         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1430         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1431         return new_Proj(irn, mode, pn_Builtin_max+1);
1432 }
1433
1434 /**
1435  * Dereference an address.
1436  *
1437  * @param dbgi  debug info
1438  * @param type  the type of the dereferenced result (the points_to type)
1439  * @param addr  the address to dereference
1440  */
1441 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1442                                       ir_node *const addr)
1443 {
1444         type_t *skipped = skip_typeref(type);
1445         if (is_type_incomplete(skipped))
1446                 return addr;
1447
1448         ir_type *irtype = get_ir_type(skipped);
1449         if (is_compound_type(irtype)
1450             || is_Method_type(irtype)
1451             || is_Array_type(irtype)) {
1452                 return addr;
1453         }
1454
1455         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1456                                   ? cons_volatile : cons_none;
1457         ir_mode *const mode     = get_type_mode(irtype);
1458         ir_node *const memory   = get_store();
1459         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1460         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1461         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1462
1463         set_store(load_mem);
1464
1465         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1466         return create_conv(dbgi, load_res, mode_arithmetic);
1467 }
1468
1469 /**
1470  * Creates a strict Conv (to the node's mode) if necessary.
1471  *
1472  * @param dbgi  debug info
1473  * @param node  the node to strict conv
1474  */
1475 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1476 {
1477         ir_mode *mode = get_irn_mode(node);
1478
1479         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1480                 return node;
1481         if (!mode_is_float(mode))
1482                 return node;
1483
1484         /* check if there is already a Conv */
1485         if (is_Conv(node)) {
1486                 /* convert it into a strict Conv */
1487                 set_Conv_strict(node, 1);
1488                 return node;
1489         }
1490
1491         /* otherwise create a new one */
1492         return new_d_strictConv(dbgi, node, mode);
1493 }
1494
1495 /**
1496  * Returns the correct base address depending on whether it is a parameter or a
1497  * normal local variable.
1498  */
1499 static ir_node *get_local_frame(ir_entity *const ent)
1500 {
1501         ir_graph      *const irg   = current_ir_graph;
1502         const ir_type *const owner = get_entity_owner(ent);
1503         if (owner == current_outer_frame) {
1504                 assert(current_static_link != NULL);
1505                 return current_static_link;
1506         } else {
1507                 return get_irg_frame(irg);
1508         }
1509 }
1510
1511 /**
1512  * Keep all memory edges of the given block.
1513  */
1514 static void keep_all_memory(ir_node *block)
1515 {
1516         ir_node *old = get_cur_block();
1517
1518         set_cur_block(block);
1519         keep_alive(get_store());
1520         /* TODO: keep all memory edges from restricted pointers */
1521         set_cur_block(old);
1522 }
1523
1524 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1525 {
1526         entity_t *entity = ref->entity;
1527         if (entity->enum_value.tv == NULL) {
1528                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1529                 assert(type->kind == TYPE_ENUM);
1530                 determine_enum_values(&type->enumt);
1531         }
1532
1533         return new_Const(entity->enum_value.tv);
1534 }
1535
1536 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1537 {
1538         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1539         entity_t *entity = ref->entity;
1540         assert(is_declaration(entity));
1541         type_t   *type   = skip_typeref(entity->declaration.type);
1542
1543         /* make sure the type is constructed */
1544         (void) get_ir_type(type);
1545
1546         if (entity->kind == ENTITY_FUNCTION
1547             && entity->function.btk != BUILTIN_NONE) {
1548                 ir_entity *irentity = get_function_entity(entity, NULL);
1549                 /* for gcc compatibility we have to produce (dummy) addresses for some
1550                  * builtins which don't have entities */
1551                 if (irentity == NULL) {
1552                         source_position_t const *const pos = &ref->base.source_position;
1553                         symbol_t          const *const sym = ref->entity->base.symbol;
1554                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1555
1556                         /* simply create a NULL pointer */
1557                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1558                         ir_node  *res  = new_Const(get_mode_null(mode));
1559
1560                         return res;
1561                 }
1562         }
1563
1564         switch ((declaration_kind_t) entity->declaration.kind) {
1565         case DECLARATION_KIND_UNKNOWN:
1566                 break;
1567
1568         case DECLARATION_KIND_LOCAL_VARIABLE: {
1569                 ir_mode *const mode  = get_ir_mode_storage(type);
1570                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1571                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1572         }
1573         case DECLARATION_KIND_PARAMETER: {
1574                 ir_mode *const mode  = get_ir_mode_storage(type);
1575                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1576                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1577         }
1578         case DECLARATION_KIND_FUNCTION: {
1579                 return create_symconst(dbgi, entity->function.irentity);
1580         }
1581         case DECLARATION_KIND_INNER_FUNCTION: {
1582                 ir_mode *const mode = get_ir_mode_storage(type);
1583                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1584                         /* inner function not using the closure */
1585                         return create_symconst(dbgi, entity->function.irentity);
1586                 } else {
1587                         /* need trampoline here */
1588                         return create_trampoline(dbgi, mode, entity->function.irentity);
1589                 }
1590         }
1591         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1592                 const variable_t *variable = &entity->variable;
1593                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1594                 return deref_address(dbgi, variable->base.type, addr);
1595         }
1596
1597         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1598                 ir_entity *irentity = entity->variable.v.entity;
1599                 ir_node   *frame    = get_local_frame(irentity);
1600                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1601                 return deref_address(dbgi, entity->declaration.type, sel);
1602         }
1603         case DECLARATION_KIND_PARAMETER_ENTITY: {
1604                 ir_entity *irentity = entity->parameter.v.entity;
1605                 ir_node   *frame    = get_local_frame(irentity);
1606                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1607                 return deref_address(dbgi, entity->declaration.type, sel);
1608         }
1609
1610         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1611                 return entity->variable.v.vla_base;
1612
1613         case DECLARATION_KIND_COMPOUND_MEMBER:
1614                 panic("not implemented reference type");
1615         }
1616
1617         panic("reference to declaration with unknown type found");
1618 }
1619
1620 static ir_node *reference_addr(const reference_expression_t *ref)
1621 {
1622         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1623         entity_t *entity = ref->entity;
1624         assert(is_declaration(entity));
1625
1626         switch((declaration_kind_t) entity->declaration.kind) {
1627         case DECLARATION_KIND_UNKNOWN:
1628                 break;
1629         case DECLARATION_KIND_PARAMETER:
1630         case DECLARATION_KIND_LOCAL_VARIABLE:
1631                 /* you can store to a local variable (so we don't panic but return NULL
1632                  * as an indicator for no real address) */
1633                 return NULL;
1634         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1635                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1636                 return addr;
1637         }
1638         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1639                 ir_entity *irentity = entity->variable.v.entity;
1640                 ir_node   *frame    = get_local_frame(irentity);
1641                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1642
1643                 return sel;
1644         }
1645         case DECLARATION_KIND_PARAMETER_ENTITY: {
1646                 ir_entity *irentity = entity->parameter.v.entity;
1647                 ir_node   *frame    = get_local_frame(irentity);
1648                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1649
1650                 return sel;
1651         }
1652
1653         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1654                 return entity->variable.v.vla_base;
1655
1656         case DECLARATION_KIND_FUNCTION: {
1657                 return create_symconst(dbgi, entity->function.irentity);
1658         }
1659
1660         case DECLARATION_KIND_INNER_FUNCTION: {
1661                 type_t  *const type = skip_typeref(entity->declaration.type);
1662                 ir_mode *const mode = get_ir_mode_storage(type);
1663                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1664                         /* inner function not using the closure */
1665                         return create_symconst(dbgi, entity->function.irentity);
1666                 } else {
1667                         /* need trampoline here */
1668                         return create_trampoline(dbgi, mode, entity->function.irentity);
1669                 }
1670         }
1671
1672         case DECLARATION_KIND_COMPOUND_MEMBER:
1673                 panic("not implemented reference type");
1674         }
1675
1676         panic("reference to declaration with unknown type found");
1677 }
1678
1679 /**
1680  * Transform calls to builtin functions.
1681  */
1682 static ir_node *process_builtin_call(const call_expression_t *call)
1683 {
1684         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1685
1686         assert(call->function->kind == EXPR_REFERENCE);
1687         reference_expression_t *builtin = &call->function->reference;
1688
1689         type_t *expr_type = skip_typeref(builtin->base.type);
1690         assert(is_type_pointer(expr_type));
1691
1692         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1693
1694         switch (builtin->entity->function.btk) {
1695         case BUILTIN_NONE:
1696                 break;
1697         case BUILTIN_ALLOCA: {
1698                 expression_t *argument = call->arguments->expression;
1699                 ir_node      *size     = expression_to_firm(argument);
1700
1701                 ir_node *store  = get_store();
1702                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1703                                               stack_alloc);
1704                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1705                 set_store(proj_m);
1706                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1707
1708                 return res;
1709         }
1710         case BUILTIN_INF: {
1711                 type_t    *type = function_type->function.return_type;
1712                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1713                 ir_tarval *tv   = get_mode_infinite(mode);
1714                 ir_node   *res  = new_d_Const(dbgi, tv);
1715                 return res;
1716         }
1717         case BUILTIN_NAN: {
1718                 /* Ignore string for now... */
1719                 assert(is_type_function(function_type));
1720                 type_t    *type = function_type->function.return_type;
1721                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1722                 ir_tarval *tv   = get_mode_NAN(mode);
1723                 ir_node   *res  = new_d_Const(dbgi, tv);
1724                 return res;
1725         }
1726         case BUILTIN_EXPECT: {
1727                 expression_t *argument = call->arguments->expression;
1728                 return _expression_to_firm(argument);
1729         }
1730         case BUILTIN_VA_END:
1731                 /* evaluate the argument of va_end for its side effects */
1732                 _expression_to_firm(call->arguments->expression);
1733                 return NULL;
1734         case BUILTIN_OBJECT_SIZE: {
1735                 /* determine value of "type" */
1736                 expression_t *type_expression = call->arguments->next->expression;
1737                 long          type_val        = fold_constant_to_int(type_expression);
1738                 type_t       *type            = function_type->function.return_type;
1739                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1740                 /* just produce a "I don't know" result */
1741                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1742                                                 get_mode_minus_one(mode);
1743
1744                 return new_d_Const(dbgi, result);
1745         }
1746         case BUILTIN_ROTL: {
1747                 ir_node *val  = expression_to_firm(call->arguments->expression);
1748                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1749                 ir_mode *mode = get_irn_mode(val);
1750                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1751                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1752         }
1753         case BUILTIN_ROTR: {
1754                 ir_node *val  = expression_to_firm(call->arguments->expression);
1755                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1756                 ir_mode *mode = get_irn_mode(val);
1757                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1758                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1759                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1760                 return new_d_Rotl(dbgi, val, sub, mode);
1761         }
1762         case BUILTIN_FIRM:
1763                 break;
1764         case BUILTIN_LIBC:
1765         case BUILTIN_LIBC_CHECK:
1766                 panic("builtin did not produce an entity");
1767         }
1768         panic("invalid builtin found");
1769 }
1770
1771 /**
1772  * Transform a call expression.
1773  * Handles some special cases, like alloca() calls, which must be resolved
1774  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1775  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1776  * handled right...
1777  */
1778 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1779 {
1780         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1781         assert(currently_reachable());
1782
1783         expression_t   *function = call->function;
1784         ir_node        *callee   = NULL;
1785         bool            firm_builtin = false;
1786         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1787         if (function->kind == EXPR_REFERENCE) {
1788                 const reference_expression_t *ref    = &function->reference;
1789                 entity_t                     *entity = ref->entity;
1790
1791                 if (entity->kind == ENTITY_FUNCTION) {
1792                         builtin_kind_t builtin = entity->function.btk;
1793                         if (builtin == BUILTIN_FIRM) {
1794                                 firm_builtin = true;
1795                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1796                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1797                                    && builtin != BUILTIN_LIBC_CHECK) {
1798                                 return process_builtin_call(call);
1799                         }
1800                 }
1801         }
1802         if (!firm_builtin)
1803                 callee = expression_to_firm(function);
1804
1805         type_t *type = skip_typeref(function->base.type);
1806         assert(is_type_pointer(type));
1807         pointer_type_t *pointer_type = &type->pointer;
1808         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1809         assert(is_type_function(points_to));
1810         function_type_t *function_type = &points_to->function;
1811
1812         int      n_parameters    = 0;
1813         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1814         ir_type *new_method_type = NULL;
1815         if (function_type->variadic || function_type->unspecified_parameters) {
1816                 const call_argument_t *argument = call->arguments;
1817                 for ( ; argument != NULL; argument = argument->next) {
1818                         ++n_parameters;
1819                 }
1820
1821                 /* we need to construct a new method type matching the call
1822                  * arguments... */
1823                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1824                 int n_res       = get_method_n_ress(ir_method_type);
1825                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1826                 set_method_calling_convention(new_method_type,
1827                                get_method_calling_convention(ir_method_type));
1828                 set_method_additional_properties(new_method_type,
1829                                get_method_additional_properties(ir_method_type));
1830                 set_method_variadicity(new_method_type,
1831                                        get_method_variadicity(ir_method_type));
1832
1833                 for (int i = 0; i < n_res; ++i) {
1834                         set_method_res_type(new_method_type, i,
1835                                             get_method_res_type(ir_method_type, i));
1836                 }
1837                 argument = call->arguments;
1838                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1839                         expression_t *expression = argument->expression;
1840                         ir_type      *irtype     = get_ir_type(expression->base.type);
1841                         set_method_param_type(new_method_type, i, irtype);
1842                 }
1843                 ir_method_type = new_method_type;
1844         } else {
1845                 n_parameters = get_method_n_params(ir_method_type);
1846         }
1847
1848         ir_node *in[n_parameters];
1849
1850         const call_argument_t *argument = call->arguments;
1851         for (int n = 0; n < n_parameters; ++n) {
1852                 expression_t *expression = argument->expression;
1853                 ir_node      *arg_node   = expression_to_firm(expression);
1854
1855                 type_t *arg_type = skip_typeref(expression->base.type);
1856                 if (!is_type_compound(arg_type)) {
1857                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1858                         arg_node = create_conv(dbgi, arg_node, mode);
1859                         arg_node = do_strict_conv(dbgi, arg_node);
1860                 }
1861
1862                 in[n] = arg_node;
1863
1864                 argument = argument->next;
1865         }
1866
1867         ir_node *store;
1868         if (function_type->modifiers & DM_CONST) {
1869                 store = get_irg_no_mem(current_ir_graph);
1870         } else {
1871                 store = get_store();
1872         }
1873
1874         ir_node *node;
1875         type_t  *return_type = skip_typeref(function_type->return_type);
1876         ir_node *result      = NULL;
1877         if (firm_builtin) {
1878                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1879                                      ir_method_type);
1880                 if (! (function_type->modifiers & DM_CONST)) {
1881                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1882                         set_store(mem);
1883                 }
1884
1885                 if (!is_type_void(return_type)) {
1886                         assert(is_type_scalar(return_type));
1887                         ir_mode *mode = get_ir_mode_storage(return_type);
1888                         result = new_Proj(node, mode, pn_Builtin_max+1);
1889                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1890                         result              = create_conv(NULL, result, mode_arith);
1891                 }
1892         } else {
1893                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1894                 if (! (function_type->modifiers & DM_CONST)) {
1895                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1896                         set_store(mem);
1897                 }
1898
1899                 if (!is_type_void(return_type)) {
1900                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1901                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1902                         result                    = new_Proj(resproj, mode, 0);
1903                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1904                         result                    = create_conv(NULL, result, mode_arith);
1905                 }
1906         }
1907
1908         if (function_type->modifiers & DM_NORETURN) {
1909                 /* A dead end:  Keep the Call and the Block.  Also place all further
1910                  * nodes into a new and unreachable block. */
1911                 keep_alive(node);
1912                 keep_alive(get_cur_block());
1913                 ir_node *block = new_Block(0, NULL);
1914                 set_cur_block(block);
1915         }
1916
1917         return result;
1918 }
1919
1920 static ir_node *statement_to_firm(statement_t *statement);
1921 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1922
1923 static ir_node *expression_to_addr(const expression_t *expression);
1924 static ir_node *create_condition_evaluation(const expression_t *expression,
1925                                             ir_node *true_block,
1926                                             ir_node *false_block);
1927
1928 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1929                          ir_node *value)
1930 {
1931         if (!is_type_compound(type)) {
1932                 ir_mode *mode = get_ir_mode_storage(type);
1933                 value         = create_conv(dbgi, value, mode);
1934                 value         = do_strict_conv(dbgi, value);
1935         }
1936
1937         ir_node *memory = get_store();
1938
1939         if (is_type_scalar(type)) {
1940                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1941                                       ? cons_volatile : cons_none;
1942                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1943                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1944                 set_store(store_mem);
1945         } else {
1946                 ir_type *irtype    = get_ir_type(type);
1947                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1948                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1949                 set_store(copyb_mem);
1950         }
1951 }
1952
1953 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1954 {
1955         ir_tarval *all_one   = get_mode_all_one(mode);
1956         int        mode_size = get_mode_size_bits(mode);
1957         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1958
1959         assert(offset >= 0);
1960         assert(size   >= 0);
1961         assert(offset + size <= mode_size);
1962         if (size == mode_size) {
1963                 return all_one;
1964         }
1965
1966         long       shiftr    = get_mode_size_bits(mode) - size;
1967         long       shiftl    = offset;
1968         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1969         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1970         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1971         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1972
1973         return mask1;
1974 }
1975
1976 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1977                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1978                 bool need_return)
1979 {
1980         ir_type *entity_type = get_entity_type(entity);
1981         ir_type *base_type   = get_primitive_base_type(entity_type);
1982         ir_mode *mode        = get_type_mode(base_type);
1983         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1984
1985         value = create_conv(dbgi, value, mode);
1986
1987         /* kill upper bits of value and shift to right position */
1988         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1989         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1990         unsigned  base_bits  = get_mode_size_bits(mode);
1991         unsigned  shiftwidth = base_bits - bitsize;
1992
1993         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1994         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1995
1996         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1997         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1998         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1999
2000         /* load current value */
2001         ir_node   *mem             = get_store();
2002         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2003                                           set_volatile ? cons_volatile : cons_none);
2004         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2005         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2006         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2007         ir_tarval *inv_mask        = tarval_not(shift_mask);
2008         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2009         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2010
2011         /* construct new value and store */
2012         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2013         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2014                                          set_volatile ? cons_volatile : cons_none);
2015         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2016         set_store(store_mem);
2017
2018         if (!need_return)
2019                 return NULL;
2020
2021         ir_node *res_shr;
2022         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2023         if (mode_is_signed(mode)) {
2024                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2025         } else {
2026                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2027         }
2028         return res_shr;
2029 }
2030
2031 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2032                                          ir_node *addr)
2033 {
2034         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2035         entity_t *entity    = expression->compound_entry;
2036         type_t   *base_type = entity->declaration.type;
2037         ir_mode  *mode      = get_ir_mode_storage(base_type);
2038         ir_node  *mem       = get_store();
2039         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2040         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2041         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2042         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2043
2044         ir_mode  *amode     = mode;
2045         /* optimisation, since shifting in modes < machine_size is usually
2046          * less efficient */
2047         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2048                 amode = mode_uint;
2049         }
2050         unsigned amode_size = get_mode_size_bits(amode);
2051         load_res = create_conv(dbgi, load_res, amode);
2052
2053         set_store(load_mem);
2054
2055         /* kill upper bits */
2056         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2057         unsigned   bitoffset   = entity->compound_member.bit_offset;
2058         unsigned   bitsize     = entity->compound_member.bit_size;
2059         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2060         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2061         ir_node   *countl      = new_d_Const(dbgi, tvl);
2062         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2063
2064         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2065         assert(shift_bitsr <= amode_size);
2066         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2067         ir_node   *countr      = new_d_Const(dbgi, tvr);
2068         ir_node   *shiftr;
2069         if (mode_is_signed(mode)) {
2070                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2071         } else {
2072                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2073         }
2074
2075         type_t  *type    = expression->base.type;
2076         ir_mode *resmode = get_ir_mode_arithmetic(type);
2077         return create_conv(dbgi, shiftr, resmode);
2078 }
2079
2080 /* make sure the selected compound type is constructed */
2081 static void construct_select_compound(const select_expression_t *expression)
2082 {
2083         type_t *type = skip_typeref(expression->compound->base.type);
2084         if (is_type_pointer(type)) {
2085                 type = type->pointer.points_to;
2086         }
2087         (void) get_ir_type(type);
2088 }
2089
2090 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2091                                               ir_node *value, ir_node *addr)
2092 {
2093         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2094         type_t   *type = skip_typeref(expression->base.type);
2095
2096         if (!is_type_compound(type)) {
2097                 ir_mode  *mode = get_ir_mode_storage(type);
2098                 value          = create_conv(dbgi, value, mode);
2099                 value          = do_strict_conv(dbgi, value);
2100         }
2101
2102         if (expression->kind == EXPR_REFERENCE) {
2103                 const reference_expression_t *ref = &expression->reference;
2104
2105                 entity_t *entity = ref->entity;
2106                 assert(is_declaration(entity));
2107                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2108                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2109                         set_value(entity->variable.v.value_number, value);
2110                         return value;
2111                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2112                         set_value(entity->parameter.v.value_number, value);
2113                         return value;
2114                 }
2115         }
2116
2117         if (addr == NULL)
2118                 addr = expression_to_addr(expression);
2119         assert(addr != NULL);
2120
2121         if (expression->kind == EXPR_SELECT) {
2122                 const select_expression_t *select = &expression->select;
2123
2124                 construct_select_compound(select);
2125
2126                 entity_t *entity = select->compound_entry;
2127                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2128                 if (entity->compound_member.bitfield) {
2129                         ir_entity *irentity = entity->compound_member.entity;
2130                         bool       set_volatile
2131                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2132                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2133                                                        set_volatile, true);
2134                         return value;
2135                 }
2136         }
2137
2138         assign_value(dbgi, addr, type, value);
2139         return value;
2140 }
2141
2142 static void set_value_for_expression(const expression_t *expression,
2143                                      ir_node *value)
2144 {
2145         set_value_for_expression_addr(expression, value, NULL);
2146 }
2147
2148 static ir_node *get_value_from_lvalue(const expression_t *expression,
2149                                       ir_node *addr)
2150 {
2151         if (expression->kind == EXPR_REFERENCE) {
2152                 const reference_expression_t *ref = &expression->reference;
2153
2154                 entity_t *entity = ref->entity;
2155                 assert(entity->kind == ENTITY_VARIABLE
2156                                 || entity->kind == ENTITY_PARAMETER);
2157                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2158                 int value_number;
2159                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2160                         value_number = entity->variable.v.value_number;
2161                         assert(addr == NULL);
2162                         type_t  *type = skip_typeref(expression->base.type);
2163                         ir_mode *mode = get_ir_mode_storage(type);
2164                         ir_node *res  = get_value(value_number, mode);
2165                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2166                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2167                         value_number = entity->parameter.v.value_number;
2168                         assert(addr == NULL);
2169                         type_t  *type = skip_typeref(expression->base.type);
2170                         ir_mode *mode = get_ir_mode_storage(type);
2171                         ir_node *res  = get_value(value_number, mode);
2172                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2173                 }
2174         }
2175
2176         assert(addr != NULL);
2177         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2178
2179         ir_node *value;
2180         if (expression->kind == EXPR_SELECT &&
2181             expression->select.compound_entry->compound_member.bitfield) {
2182             construct_select_compound(&expression->select);
2183                 value = bitfield_extract_to_firm(&expression->select, addr);
2184         } else {
2185                 value = deref_address(dbgi, expression->base.type, addr);
2186         }
2187
2188         return value;
2189 }
2190
2191
2192 static ir_node *create_incdec(const unary_expression_t *expression)
2193 {
2194         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2195         const expression_t *value_expr = expression->value;
2196         ir_node            *addr       = expression_to_addr(value_expr);
2197         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2198
2199         type_t  *type = skip_typeref(expression->base.type);
2200         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2201
2202         ir_node *offset;
2203         if (is_type_pointer(type)) {
2204                 pointer_type_t *pointer_type = &type->pointer;
2205                 offset = get_type_size_node(pointer_type->points_to);
2206         } else {
2207                 assert(is_type_arithmetic(type));
2208                 offset = new_Const(get_mode_one(mode));
2209         }
2210
2211         ir_node *result;
2212         ir_node *store_value;
2213         switch(expression->base.kind) {
2214         case EXPR_UNARY_POSTFIX_INCREMENT:
2215                 result      = value;
2216                 store_value = new_d_Add(dbgi, value, offset, mode);
2217                 break;
2218         case EXPR_UNARY_POSTFIX_DECREMENT:
2219                 result      = value;
2220                 store_value = new_d_Sub(dbgi, value, offset, mode);
2221                 break;
2222         case EXPR_UNARY_PREFIX_INCREMENT:
2223                 result      = new_d_Add(dbgi, value, offset, mode);
2224                 store_value = result;
2225                 break;
2226         case EXPR_UNARY_PREFIX_DECREMENT:
2227                 result      = new_d_Sub(dbgi, value, offset, mode);
2228                 store_value = result;
2229                 break;
2230         default:
2231                 panic("no incdec expr in create_incdec");
2232         }
2233
2234         set_value_for_expression_addr(value_expr, store_value, addr);
2235
2236         return result;
2237 }
2238
2239 static bool is_local_variable(expression_t *expression)
2240 {
2241         if (expression->kind != EXPR_REFERENCE)
2242                 return false;
2243         reference_expression_t *ref_expr = &expression->reference;
2244         entity_t               *entity   = ref_expr->entity;
2245         if (entity->kind != ENTITY_VARIABLE)
2246                 return false;
2247         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2248         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2249 }
2250
2251 static ir_relation get_relation(const expression_kind_t kind)
2252 {
2253         switch(kind) {
2254         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2255         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2256         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2257         case EXPR_BINARY_ISLESS:
2258         case EXPR_BINARY_LESS:          return ir_relation_less;
2259         case EXPR_BINARY_ISLESSEQUAL:
2260         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2261         case EXPR_BINARY_ISGREATER:
2262         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2263         case EXPR_BINARY_ISGREATEREQUAL:
2264         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2265         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2266
2267         default:
2268                 break;
2269         }
2270         panic("trying to get pn_Cmp from non-comparison binexpr type");
2271 }
2272
2273 /**
2274  * Handle the assume optimizer hint: check if a Confirm
2275  * node can be created.
2276  *
2277  * @param dbi    debug info
2278  * @param expr   the IL assume expression
2279  *
2280  * we support here only some simple cases:
2281  *  - var rel const
2282  *  - const rel val
2283  *  - var rel var
2284  */
2285 static ir_node *handle_assume_compare(dbg_info *dbi,
2286                                       const binary_expression_t *expression)
2287 {
2288         expression_t *op1 = expression->left;
2289         expression_t *op2 = expression->right;
2290         entity_t     *var2, *var = NULL;
2291         ir_node      *res      = NULL;
2292         ir_relation   relation = get_relation(expression->base.kind);
2293
2294         if (is_local_variable(op1) && is_local_variable(op2)) {
2295                 var  = op1->reference.entity;
2296             var2 = op2->reference.entity;
2297
2298                 type_t  *const type = skip_typeref(var->declaration.type);
2299                 ir_mode *const mode = get_ir_mode_storage(type);
2300
2301                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2302                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2303
2304                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2305                 set_value(var2->variable.v.value_number, res);
2306
2307                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2308                 set_value(var->variable.v.value_number, res);
2309
2310                 return res;
2311         }
2312
2313         expression_t *con = NULL;
2314         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2315                 var = op1->reference.entity;
2316                 con = op2;
2317         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2318                 relation = get_inversed_relation(relation);
2319                 var = op2->reference.entity;
2320                 con = op1;
2321         }
2322
2323         if (var != NULL) {
2324                 type_t  *const type = skip_typeref(var->declaration.type);
2325                 ir_mode *const mode = get_ir_mode_storage(type);
2326
2327                 res = get_value(var->variable.v.value_number, mode);
2328                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2329                 set_value(var->variable.v.value_number, res);
2330         }
2331         return res;
2332 }
2333
2334 /**
2335  * Handle the assume optimizer hint.
2336  *
2337  * @param dbi    debug info
2338  * @param expr   the IL assume expression
2339  */
2340 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2341 {
2342         switch(expression->kind) {
2343         case EXPR_BINARY_EQUAL:
2344         case EXPR_BINARY_NOTEQUAL:
2345         case EXPR_BINARY_LESS:
2346         case EXPR_BINARY_LESSEQUAL:
2347         case EXPR_BINARY_GREATER:
2348         case EXPR_BINARY_GREATEREQUAL:
2349                 return handle_assume_compare(dbi, &expression->binary);
2350         default:
2351                 return NULL;
2352         }
2353 }
2354
2355 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2356                             type_t *from_type, type_t *type)
2357 {
2358         type = skip_typeref(type);
2359         if (is_type_void(type)) {
2360                 /* make sure firm type is constructed */
2361                 (void) get_ir_type(type);
2362                 return NULL;
2363         }
2364         if (!is_type_scalar(type)) {
2365                 /* make sure firm type is constructed */
2366                 (void) get_ir_type(type);
2367                 return value_node;
2368         }
2369
2370         from_type     = skip_typeref(from_type);
2371         ir_mode *mode = get_ir_mode_storage(type);
2372         /* check for conversion from / to __based types */
2373         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2374                 const variable_t *from_var = from_type->pointer.base_variable;
2375                 const variable_t *to_var   = type->pointer.base_variable;
2376                 if (from_var != to_var) {
2377                         if (from_var != NULL) {
2378                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2379                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2380                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2381                         }
2382                         if (to_var != NULL) {
2383                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2384                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2385                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2386                         }
2387                 }
2388         }
2389
2390         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2391                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2392                  * convert to mode_b so we only get a 0/1 value */
2393                 value_node = create_conv(dbgi, value_node, mode_b);
2394         }
2395
2396         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2397         ir_node *node       = create_conv(dbgi, value_node, mode);
2398         node                = do_strict_conv(dbgi, node);
2399         node                = create_conv(dbgi, node, mode_arith);
2400
2401         return node;
2402 }
2403
2404 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2405 {
2406         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2407         type_t   *type = skip_typeref(expression->base.type);
2408
2409         const expression_t *value = expression->value;
2410
2411         switch(expression->base.kind) {
2412         case EXPR_UNARY_TAKE_ADDRESS:
2413                 return expression_to_addr(value);
2414
2415         case EXPR_UNARY_NEGATE: {
2416                 ir_node *value_node = expression_to_firm(value);
2417                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2418                 return new_d_Minus(dbgi, value_node, mode);
2419         }
2420         case EXPR_UNARY_PLUS:
2421                 return expression_to_firm(value);
2422         case EXPR_UNARY_BITWISE_NEGATE: {
2423                 ir_node *value_node = expression_to_firm(value);
2424                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2425                 return new_d_Not(dbgi, value_node, mode);
2426         }
2427         case EXPR_UNARY_NOT: {
2428                 ir_node *value_node = _expression_to_firm(value);
2429                 value_node          = create_conv(dbgi, value_node, mode_b);
2430                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2431                 return res;
2432         }
2433         case EXPR_UNARY_DEREFERENCE: {
2434                 ir_node *value_node = expression_to_firm(value);
2435                 type_t  *value_type = skip_typeref(value->base.type);
2436                 assert(is_type_pointer(value_type));
2437
2438                 /* check for __based */
2439                 const variable_t *const base_var = value_type->pointer.base_variable;
2440                 if (base_var != NULL) {
2441                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2442                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2443                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2444                 }
2445                 type_t  *points_to  = value_type->pointer.points_to;
2446                 return deref_address(dbgi, points_to, value_node);
2447         }
2448         case EXPR_UNARY_POSTFIX_INCREMENT:
2449         case EXPR_UNARY_POSTFIX_DECREMENT:
2450         case EXPR_UNARY_PREFIX_INCREMENT:
2451         case EXPR_UNARY_PREFIX_DECREMENT:
2452                 return create_incdec(expression);
2453         case EXPR_UNARY_CAST: {
2454                 ir_node *value_node = expression_to_firm(value);
2455                 type_t  *from_type  = value->base.type;
2456                 return create_cast(dbgi, value_node, from_type, type);
2457         }
2458         case EXPR_UNARY_ASSUME:
2459                 return handle_assume(dbgi, value);
2460
2461         default:
2462                 break;
2463         }
2464         panic("invalid UNEXPR type found");
2465 }
2466
2467 /**
2468  * produces a 0/1 depending of the value of a mode_b node
2469  */
2470 static ir_node *produce_condition_result(const expression_t *expression,
2471                                          ir_mode *mode, dbg_info *dbgi)
2472 {
2473         ir_node *const one_block  = new_immBlock();
2474         ir_node *const zero_block = new_immBlock();
2475         create_condition_evaluation(expression, one_block, zero_block);
2476         mature_immBlock(one_block);
2477         mature_immBlock(zero_block);
2478
2479         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2480         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2481         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2482         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2483         set_cur_block(block);
2484
2485         ir_node *const one   = new_Const(get_mode_one(mode));
2486         ir_node *const zero  = new_Const(get_mode_null(mode));
2487         ir_node *const in[2] = { one, zero };
2488         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2489
2490         return val;
2491 }
2492
2493 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2494                 ir_node *value, type_t *type)
2495 {
2496         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2497         assert(is_type_pointer(type));
2498         pointer_type_t *const pointer_type = &type->pointer;
2499         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2500         ir_node        *      elem_size    = get_type_size_node(points_to);
2501         elem_size                          = create_conv(dbgi, elem_size, mode);
2502         value                              = create_conv(dbgi, value,     mode);
2503         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2504         return mul;
2505 }
2506
2507 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2508                           ir_node *left, ir_node *right)
2509 {
2510         ir_mode  *mode;
2511         type_t   *type_left  = skip_typeref(expression->left->base.type);
2512         type_t   *type_right = skip_typeref(expression->right->base.type);
2513
2514         expression_kind_t kind = expression->base.kind;
2515
2516         switch (kind) {
2517         case EXPR_BINARY_SHIFTLEFT:
2518         case EXPR_BINARY_SHIFTRIGHT:
2519         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2520         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2521                 mode  = get_ir_mode_arithmetic(expression->base.type);
2522                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2523                 break;
2524
2525         case EXPR_BINARY_SUB:
2526                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2527                         const pointer_type_t *const ptr_type = &type_left->pointer;
2528
2529                         mode = get_ir_mode_arithmetic(expression->base.type);
2530                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2531                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2532                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2533                         ir_node *const no_mem    = new_NoMem();
2534                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2535                                                                                                    mode, op_pin_state_floats);
2536                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2537                 }
2538                 /* fallthrough */
2539         case EXPR_BINARY_SUB_ASSIGN:
2540                 if (is_type_pointer(type_left)) {
2541                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2542                         mode  = get_ir_mode_arithmetic(type_left);
2543                         break;
2544                 }
2545                 goto normal_node;
2546
2547         case EXPR_BINARY_ADD:
2548         case EXPR_BINARY_ADD_ASSIGN:
2549                 if (is_type_pointer(type_left)) {
2550                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2551                         mode  = get_ir_mode_arithmetic(type_left);
2552                         break;
2553                 } else if (is_type_pointer(type_right)) {
2554                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2555                         mode  = get_ir_mode_arithmetic(type_right);
2556                         break;
2557                 }
2558                 goto normal_node;
2559
2560         default:
2561 normal_node:
2562                 mode = get_ir_mode_arithmetic(type_right);
2563                 left = create_conv(dbgi, left, mode);
2564                 break;
2565         }
2566
2567         switch (kind) {
2568         case EXPR_BINARY_ADD_ASSIGN:
2569         case EXPR_BINARY_ADD:
2570                 return new_d_Add(dbgi, left, right, mode);
2571         case EXPR_BINARY_SUB_ASSIGN:
2572         case EXPR_BINARY_SUB:
2573                 return new_d_Sub(dbgi, left, right, mode);
2574         case EXPR_BINARY_MUL_ASSIGN:
2575         case EXPR_BINARY_MUL:
2576                 return new_d_Mul(dbgi, left, right, mode);
2577         case EXPR_BINARY_BITWISE_AND:
2578         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2579                 return new_d_And(dbgi, left, right, mode);
2580         case EXPR_BINARY_BITWISE_OR:
2581         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2582                 return new_d_Or(dbgi, left, right, mode);
2583         case EXPR_BINARY_BITWISE_XOR:
2584         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2585                 return new_d_Eor(dbgi, left, right, mode);
2586         case EXPR_BINARY_SHIFTLEFT:
2587         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2588                 return new_d_Shl(dbgi, left, right, mode);
2589         case EXPR_BINARY_SHIFTRIGHT:
2590         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2591                 if (mode_is_signed(mode)) {
2592                         return new_d_Shrs(dbgi, left, right, mode);
2593                 } else {
2594                         return new_d_Shr(dbgi, left, right, mode);
2595                 }
2596         case EXPR_BINARY_DIV:
2597         case EXPR_BINARY_DIV_ASSIGN: {
2598                 ir_node *pin = new_Pin(new_NoMem());
2599                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2600                                          op_pin_state_floats);
2601                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2602                 return res;
2603         }
2604         case EXPR_BINARY_MOD:
2605         case EXPR_BINARY_MOD_ASSIGN: {
2606                 ir_node *pin = new_Pin(new_NoMem());
2607                 assert(!mode_is_float(mode));
2608                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2609                                          op_pin_state_floats);
2610                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2611                 return res;
2612         }
2613         default:
2614                 panic("unexpected expression kind");
2615         }
2616 }
2617
2618 static ir_node *create_lazy_op(const binary_expression_t *expression)
2619 {
2620         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2621         type_t   *type = skip_typeref(expression->base.type);
2622         ir_mode  *mode = get_ir_mode_arithmetic(type);
2623
2624         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2625                 bool val = fold_constant_to_bool(expression->left);
2626                 expression_kind_t ekind = expression->base.kind;
2627                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2628                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2629                         if (!val) {
2630                                 return new_Const(get_mode_null(mode));
2631                         }
2632                 } else {
2633                         if (val) {
2634                                 return new_Const(get_mode_one(mode));
2635                         }
2636                 }
2637
2638                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2639                         bool valr = fold_constant_to_bool(expression->right);
2640                         return create_Const_from_bool(mode, valr);
2641                 }
2642
2643                 return produce_condition_result(expression->right, mode, dbgi);
2644         }
2645
2646         return produce_condition_result((const expression_t*) expression, mode,
2647                                         dbgi);
2648 }
2649
2650 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2651                                             ir_node *right, ir_mode *mode);
2652
2653 static ir_node *create_assign_binop(const binary_expression_t *expression)
2654 {
2655         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2656         const expression_t *left_expr = expression->left;
2657         type_t             *type      = skip_typeref(left_expr->base.type);
2658         ir_node            *right     = expression_to_firm(expression->right);
2659         ir_node            *left_addr = expression_to_addr(left_expr);
2660         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2661         ir_node            *result    = create_op(dbgi, expression, left, right);
2662
2663         result = create_cast(dbgi, result, expression->right->base.type, type);
2664         result = do_strict_conv(dbgi, result);
2665
2666         result = set_value_for_expression_addr(left_expr, result, left_addr);
2667
2668         if (!is_type_compound(type)) {
2669                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2670                 result = create_conv(dbgi, result, mode_arithmetic);
2671         }
2672         return result;
2673 }
2674
2675 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2676 {
2677         expression_kind_t kind = expression->base.kind;
2678
2679         switch(kind) {
2680         case EXPR_BINARY_EQUAL:
2681         case EXPR_BINARY_NOTEQUAL:
2682         case EXPR_BINARY_LESS:
2683         case EXPR_BINARY_LESSEQUAL:
2684         case EXPR_BINARY_GREATER:
2685         case EXPR_BINARY_GREATEREQUAL:
2686         case EXPR_BINARY_ISGREATER:
2687         case EXPR_BINARY_ISGREATEREQUAL:
2688         case EXPR_BINARY_ISLESS:
2689         case EXPR_BINARY_ISLESSEQUAL:
2690         case EXPR_BINARY_ISLESSGREATER:
2691         case EXPR_BINARY_ISUNORDERED: {
2692                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2693                 ir_node    *left     = expression_to_firm(expression->left);
2694                 ir_node    *right    = expression_to_firm(expression->right);
2695                 ir_relation relation = get_relation(kind);
2696                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2697                 return cmp;
2698         }
2699         case EXPR_BINARY_ASSIGN: {
2700                 ir_node *addr  = expression_to_addr(expression->left);
2701                 ir_node *right = expression_to_firm(expression->right);
2702                 ir_node *res
2703                         = set_value_for_expression_addr(expression->left, right, addr);
2704
2705                 type_t  *type            = skip_typeref(expression->base.type);
2706                 if (!is_type_compound(type)) {
2707                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2708                         res                      = create_conv(NULL, res, mode_arithmetic);
2709                 }
2710                 return res;
2711         }
2712         case EXPR_BINARY_ADD:
2713         case EXPR_BINARY_SUB:
2714         case EXPR_BINARY_MUL:
2715         case EXPR_BINARY_DIV:
2716         case EXPR_BINARY_MOD:
2717         case EXPR_BINARY_BITWISE_AND:
2718         case EXPR_BINARY_BITWISE_OR:
2719         case EXPR_BINARY_BITWISE_XOR:
2720         case EXPR_BINARY_SHIFTLEFT:
2721         case EXPR_BINARY_SHIFTRIGHT:
2722         {
2723                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2724                 ir_node  *left  = expression_to_firm(expression->left);
2725                 ir_node  *right = expression_to_firm(expression->right);
2726                 return create_op(dbgi, expression, left, right);
2727         }
2728         case EXPR_BINARY_LOGICAL_AND:
2729         case EXPR_BINARY_LOGICAL_OR:
2730                 return create_lazy_op(expression);
2731         case EXPR_BINARY_COMMA:
2732                 /* create side effects of left side */
2733                 (void) expression_to_firm(expression->left);
2734                 return _expression_to_firm(expression->right);
2735
2736         case EXPR_BINARY_ADD_ASSIGN:
2737         case EXPR_BINARY_SUB_ASSIGN:
2738         case EXPR_BINARY_MUL_ASSIGN:
2739         case EXPR_BINARY_MOD_ASSIGN:
2740         case EXPR_BINARY_DIV_ASSIGN:
2741         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2742         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2743         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2744         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2745         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2746                 return create_assign_binop(expression);
2747         default:
2748                 panic("TODO binexpr type");
2749         }
2750 }
2751
2752 static ir_node *array_access_addr(const array_access_expression_t *expression)
2753 {
2754         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2755         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2756         ir_node  *offset      = expression_to_firm(expression->index);
2757         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2758         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2759         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2760
2761         return result;
2762 }
2763
2764 static ir_node *array_access_to_firm(
2765                 const array_access_expression_t *expression)
2766 {
2767         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2768         ir_node  *addr   = array_access_addr(expression);
2769         type_t   *type   = revert_automatic_type_conversion(
2770                         (const expression_t*) expression);
2771         type             = skip_typeref(type);
2772
2773         return deref_address(dbgi, type, addr);
2774 }
2775
2776 static long get_offsetof_offset(const offsetof_expression_t *expression)
2777 {
2778         type_t *orig_type = expression->type;
2779         long    offset    = 0;
2780
2781         designator_t *designator = expression->designator;
2782         for ( ; designator != NULL; designator = designator->next) {
2783                 type_t *type = skip_typeref(orig_type);
2784                 /* be sure the type is constructed */
2785                 (void) get_ir_type(type);
2786
2787                 if (designator->symbol != NULL) {
2788                         assert(is_type_compound(type));
2789                         symbol_t *symbol = designator->symbol;
2790
2791                         compound_t *compound = type->compound.compound;
2792                         entity_t   *iter     = compound->members.entities;
2793                         for ( ; iter != NULL; iter = iter->base.next) {
2794                                 if (iter->base.symbol == symbol) {
2795                                         break;
2796                                 }
2797                         }
2798                         assert(iter != NULL);
2799
2800                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2801                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2802                         offset += get_entity_offset(iter->compound_member.entity);
2803
2804                         orig_type = iter->declaration.type;
2805                 } else {
2806                         expression_t *array_index = designator->array_index;
2807                         assert(designator->array_index != NULL);
2808                         assert(is_type_array(type));
2809
2810                         long index         = fold_constant_to_int(array_index);
2811                         ir_type *arr_type  = get_ir_type(type);
2812                         ir_type *elem_type = get_array_element_type(arr_type);
2813                         long     elem_size = get_type_size_bytes(elem_type);
2814
2815                         offset += index * elem_size;
2816
2817                         orig_type = type->array.element_type;
2818                 }
2819         }
2820
2821         return offset;
2822 }
2823
2824 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2825 {
2826         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2827         long       offset = get_offsetof_offset(expression);
2828         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2829         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2830
2831         return new_d_Const(dbgi, tv);
2832 }
2833
2834 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2835                                      ir_entity *entity, type_t *type);
2836 static ir_initializer_t *create_ir_initializer(
2837                 const initializer_t *initializer, type_t *type);
2838
2839 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2840                                             initializer_t *initializer,
2841                                             type_t *type)
2842 {
2843         /* create the ir_initializer */
2844         ir_graph *const old_current_ir_graph = current_ir_graph;
2845         current_ir_graph = get_const_code_irg();
2846
2847         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2848
2849         assert(current_ir_graph == get_const_code_irg());
2850         current_ir_graph = old_current_ir_graph;
2851
2852         ident     *const id          = id_unique("initializer.%u");
2853         ir_type   *const irtype      = get_ir_type(type);
2854         ir_type   *const global_type = get_glob_type();
2855         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2856         set_entity_ld_ident(entity, id);
2857         set_entity_visibility(entity, ir_visibility_private);
2858         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2859         set_entity_initializer(entity, irinitializer);
2860         return entity;
2861 }
2862
2863 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2864 {
2865         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2866         type_t        *type        = expression->type;
2867         initializer_t *initializer = expression->initializer;
2868
2869         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2870                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2871                 return create_symconst(dbgi, entity);
2872         } else {
2873                 /* create an entity on the stack */
2874                 ident   *const id     = id_unique("CompLit.%u");
2875                 ir_type *const irtype = get_ir_type(type);
2876                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2877
2878                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2879                 set_entity_ld_ident(entity, id);
2880
2881                 /* create initialisation code */
2882                 create_local_initializer(initializer, dbgi, entity, type);
2883
2884                 /* create a sel for the compound literal address */
2885                 ir_node *frame = get_irg_frame(current_ir_graph);
2886                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2887                 return sel;
2888         }
2889 }
2890
2891 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2892 {
2893         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2894         type_t   *const type = expr->type;
2895         ir_node  *const addr = compound_literal_addr(expr);
2896         return deref_address(dbgi, type, addr);
2897 }
2898
2899 /**
2900  * Transform a sizeof expression into Firm code.
2901  */
2902 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2903 {
2904         type_t *const type = skip_typeref(expression->type);
2905         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2906         if (is_type_array(type) && type->array.is_vla
2907                         && expression->tp_expression != NULL) {
2908                 expression_to_firm(expression->tp_expression);
2909         }
2910
2911         return get_type_size_node(type);
2912 }
2913
2914 static entity_t *get_expression_entity(const expression_t *expression)
2915 {
2916         if (expression->kind != EXPR_REFERENCE)
2917                 return NULL;
2918
2919         return expression->reference.entity;
2920 }
2921
2922 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2923 {
2924         switch(entity->kind) {
2925         case DECLARATION_KIND_CASES:
2926                 return entity->declaration.alignment;
2927         case ENTITY_STRUCT:
2928         case ENTITY_UNION:
2929                 return entity->compound.alignment;
2930         case ENTITY_TYPEDEF:
2931                 return entity->typedefe.alignment;
2932         default:
2933                 break;
2934         }
2935         return 0;
2936 }
2937
2938 /**
2939  * Transform an alignof expression into Firm code.
2940  */
2941 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2942 {
2943         unsigned alignment = 0;
2944
2945         const expression_t *tp_expression = expression->tp_expression;
2946         if (tp_expression != NULL) {
2947                 entity_t *entity = get_expression_entity(tp_expression);
2948                 if (entity != NULL) {
2949                         if (entity->kind == ENTITY_FUNCTION) {
2950                                 /* a gnu-extension */
2951                                 alignment = 1;
2952                         } else {
2953                                 alignment = get_cparser_entity_alignment(entity);
2954                         }
2955                 }
2956         }
2957
2958         if (alignment == 0) {
2959                 type_t *type = expression->type;
2960                 alignment = get_type_alignment(type);
2961         }
2962
2963         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2964         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2965         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2966         return new_d_Const(dbgi, tv);
2967 }
2968
2969 static void init_ir_types(void);
2970
2971 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2972 {
2973         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2974
2975         bool constant_folding_old = constant_folding;
2976         constant_folding = true;
2977         int old_optimize         = get_optimize();
2978         int old_constant_folding = get_opt_constant_folding();
2979         set_optimize(1);
2980         set_opt_constant_folding(1);
2981
2982         init_ir_types();
2983
2984         ir_graph *old_current_ir_graph = current_ir_graph;
2985         current_ir_graph = get_const_code_irg();
2986
2987         ir_node *const cnst = _expression_to_firm(expression);
2988
2989         current_ir_graph = old_current_ir_graph;
2990         set_optimize(old_optimize);
2991         set_opt_constant_folding(old_constant_folding);
2992
2993         if (!is_Const(cnst)) {
2994                 panic("couldn't fold constant");
2995         }
2996
2997         constant_folding = constant_folding_old;
2998
2999         ir_tarval *const tv   = get_Const_tarval(cnst);
3000         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
3001         return tarval_convert_to(tv, mode);
3002 }
3003
3004 /* this function is only used in parser.c, but it relies on libfirm functionality */
3005 bool constant_is_negative(const expression_t *expression)
3006 {
3007         ir_tarval *tv = fold_constant_to_tarval(expression);
3008         return tarval_is_negative(tv);
3009 }
3010
3011 long fold_constant_to_int(const expression_t *expression)
3012 {
3013         ir_tarval *tv = fold_constant_to_tarval(expression);
3014         if (!tarval_is_long(tv)) {
3015                 panic("result of constant folding is not integer");
3016         }
3017
3018         return get_tarval_long(tv);
3019 }
3020
3021 bool fold_constant_to_bool(const expression_t *expression)
3022 {
3023         ir_tarval *tv = fold_constant_to_tarval(expression);
3024         return !tarval_is_null(tv);
3025 }
3026
3027 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3028 {
3029         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3030
3031         /* first try to fold a constant condition */
3032         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3033                 bool val = fold_constant_to_bool(expression->condition);
3034                 if (val) {
3035                         expression_t *true_expression = expression->true_expression;
3036                         if (true_expression == NULL)
3037                                 true_expression = expression->condition;
3038                         return expression_to_firm(true_expression);
3039                 } else {
3040                         return expression_to_firm(expression->false_expression);
3041                 }
3042         }
3043
3044         ir_node *const true_block  = new_immBlock();
3045         ir_node *const false_block = new_immBlock();
3046         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3047         mature_immBlock(true_block);
3048         mature_immBlock(false_block);
3049
3050         set_cur_block(true_block);
3051         ir_node *true_val;
3052         if (expression->true_expression != NULL) {
3053                 true_val = expression_to_firm(expression->true_expression);
3054         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3055                 true_val = cond_expr;
3056         } else {
3057                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3058                  * comparison.  Generate a "1" as value for the true branch. */
3059                 true_val = new_Const(get_mode_one(mode_Is));
3060         }
3061         ir_node *const true_jmp = new_d_Jmp(dbgi);
3062
3063         set_cur_block(false_block);
3064         ir_node *const false_val = expression_to_firm(expression->false_expression);
3065         ir_node *const false_jmp = new_d_Jmp(dbgi);
3066
3067         /* create the common block */
3068         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3069         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3070         set_cur_block(block);
3071
3072         /* TODO improve static semantics, so either both or no values are NULL */
3073         if (true_val == NULL || false_val == NULL)
3074                 return NULL;
3075
3076         ir_node *const in[2] = { true_val, false_val };
3077         type_t  *const type  = skip_typeref(expression->base.type);
3078         ir_mode *const mode  = get_ir_mode_arithmetic(type);
3079         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3080
3081         return val;
3082 }
3083
3084 /**
3085  * Returns an IR-node representing the address of a field.
3086  */
3087 static ir_node *select_addr(const select_expression_t *expression)
3088 {
3089         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3090
3091         construct_select_compound(expression);
3092
3093         ir_node *compound_addr = expression_to_firm(expression->compound);
3094
3095         entity_t *entry = expression->compound_entry;
3096         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3097         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3098
3099         if (constant_folding) {
3100                 ir_mode *mode      = get_irn_mode(compound_addr);
3101                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3102                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3103                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3104         } else {
3105                 ir_entity *irentity = entry->compound_member.entity;
3106                 assert(irentity != NULL);
3107                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3108         }
3109 }
3110
3111 static ir_node *select_to_firm(const select_expression_t *expression)
3112 {
3113         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3114         ir_node  *addr = select_addr(expression);
3115         type_t   *type = revert_automatic_type_conversion(
3116                         (const expression_t*) expression);
3117         type           = skip_typeref(type);
3118
3119         entity_t *entry = expression->compound_entry;
3120         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3121
3122         if (entry->compound_member.bitfield) {
3123                 return bitfield_extract_to_firm(expression, addr);
3124         }
3125
3126         return deref_address(dbgi, type, addr);
3127 }
3128
3129 /* Values returned by __builtin_classify_type. */
3130 typedef enum gcc_type_class
3131 {
3132         no_type_class = -1,
3133         void_type_class,
3134         integer_type_class,
3135         char_type_class,
3136         enumeral_type_class,
3137         boolean_type_class,
3138         pointer_type_class,
3139         reference_type_class,
3140         offset_type_class,
3141         real_type_class,
3142         complex_type_class,
3143         function_type_class,
3144         method_type_class,
3145         record_type_class,
3146         union_type_class,
3147         array_type_class,
3148         string_type_class,
3149         set_type_class,
3150         file_type_class,
3151         lang_type_class
3152 } gcc_type_class;
3153
3154 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3155 {
3156         type_t *type = expr->type_expression->base.type;
3157
3158         /* FIXME gcc returns different values depending on whether compiling C or C++
3159          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3160         gcc_type_class tc;
3161         for (;;) {
3162                 type = skip_typeref(type);
3163                 switch (type->kind) {
3164                         case TYPE_ATOMIC: {
3165                                 const atomic_type_t *const atomic_type = &type->atomic;
3166                                 switch (atomic_type->akind) {
3167                                         /* should not be reached */
3168                                         case ATOMIC_TYPE_INVALID:
3169                                                 tc = no_type_class;
3170                                                 goto make_const;
3171
3172                                         /* gcc cannot do that */
3173                                         case ATOMIC_TYPE_VOID:
3174                                                 tc = void_type_class;
3175                                                 goto make_const;
3176
3177                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3178                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3179                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3180                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3181                                         case ATOMIC_TYPE_SHORT:
3182                                         case ATOMIC_TYPE_USHORT:
3183                                         case ATOMIC_TYPE_INT:
3184                                         case ATOMIC_TYPE_UINT:
3185                                         case ATOMIC_TYPE_LONG:
3186                                         case ATOMIC_TYPE_ULONG:
3187                                         case ATOMIC_TYPE_LONGLONG:
3188                                         case ATOMIC_TYPE_ULONGLONG:
3189                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3190                                                 tc = integer_type_class;
3191                                                 goto make_const;
3192
3193                                         case ATOMIC_TYPE_FLOAT:
3194                                         case ATOMIC_TYPE_DOUBLE:
3195                                         case ATOMIC_TYPE_LONG_DOUBLE:
3196                                                 tc = real_type_class;
3197                                                 goto make_const;
3198                                 }
3199                                 panic("Unexpected atomic type in classify_type_to_firm().");
3200                         }
3201
3202                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3203                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3204                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3205                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3206                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3207                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3208                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3209
3210                         /* gcc handles this as integer */
3211                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3212
3213                         /* gcc classifies the referenced type */
3214                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3215
3216                         /* typedef/typeof should be skipped already */
3217                         case TYPE_TYPEDEF:
3218                         case TYPE_TYPEOF:
3219                         case TYPE_ERROR:
3220                                 break;
3221                 }
3222                 panic("unexpected TYPE classify_type_to_firm().");
3223         }
3224
3225 make_const:;
3226         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3227         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3228         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3229         return new_d_Const(dbgi, tv);
3230 }
3231
3232 static ir_node *function_name_to_firm(
3233                 const funcname_expression_t *const expr)
3234 {
3235         switch(expr->kind) {
3236         case FUNCNAME_FUNCTION:
3237         case FUNCNAME_PRETTY_FUNCTION:
3238         case FUNCNAME_FUNCDNAME:
3239                 if (current_function_name == NULL) {
3240                         const source_position_t *const src_pos = &expr->base.source_position;
3241                         const char    *name  = current_function_entity->base.symbol->string;
3242                         const string_t string = { name, strlen(name) + 1 };
3243                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3244                 }
3245                 return current_function_name;
3246         case FUNCNAME_FUNCSIG:
3247                 if (current_funcsig == NULL) {
3248                         const source_position_t *const src_pos = &expr->base.source_position;
3249                         ir_entity *ent = get_irg_entity(current_ir_graph);
3250                         const char *const name = get_entity_ld_name(ent);
3251                         const string_t string = { name, strlen(name) + 1 };
3252                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3253                 }
3254                 return current_funcsig;
3255         }
3256         panic("Unsupported function name");
3257 }
3258
3259 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3260 {
3261         statement_t *statement = expr->statement;
3262
3263         assert(statement->kind == STATEMENT_COMPOUND);
3264         return compound_statement_to_firm(&statement->compound);
3265 }
3266
3267 static ir_node *va_start_expression_to_firm(
3268         const va_start_expression_t *const expr)
3269 {
3270         ir_entity *param_ent = current_vararg_entity;
3271         if (param_ent == NULL) {
3272                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3273                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3274                 ir_type *const param_type  = get_unknown_type();
3275                 param_ent = new_parameter_entity(frame_type, n, param_type);
3276                 current_vararg_entity = param_ent;
3277         }
3278
3279         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3280         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3281         ir_node  *const no_mem  = new_NoMem();
3282         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3283
3284         set_value_for_expression(expr->ap, arg_sel);
3285
3286         return NULL;
3287 }
3288
3289 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3290 {
3291         type_t       *const type    = expr->base.type;
3292         expression_t *const ap_expr = expr->ap;
3293         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3294         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3295         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3296         ir_node      *const res     = deref_address(dbgi, type, ap);
3297
3298         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3299         ir_mode      *const mode    = get_irn_mode(cnst);
3300         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3301         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3302         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3303         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3304         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3305
3306         set_value_for_expression_addr(ap_expr, add, ap_addr);
3307
3308         return res;
3309 }
3310
3311 /**
3312  * Generate Firm for a va_copy expression.
3313  */
3314 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3315 {
3316         ir_node *const src = expression_to_firm(expr->src);
3317         set_value_for_expression(expr->dst, src);
3318         return NULL;
3319 }
3320
3321 static ir_node *dereference_addr(const unary_expression_t *const expression)
3322 {
3323         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3324         return expression_to_firm(expression->value);
3325 }
3326
3327 /**
3328  * Returns a IR-node representing an lvalue of the given expression.
3329  */
3330 static ir_node *expression_to_addr(const expression_t *expression)
3331 {
3332         switch(expression->kind) {
3333         case EXPR_ARRAY_ACCESS:
3334                 return array_access_addr(&expression->array_access);
3335         case EXPR_CALL:
3336                 return call_expression_to_firm(&expression->call);
3337         case EXPR_COMPOUND_LITERAL:
3338                 return compound_literal_addr(&expression->compound_literal);
3339         case EXPR_REFERENCE:
3340                 return reference_addr(&expression->reference);
3341         case EXPR_SELECT:
3342                 return select_addr(&expression->select);
3343         case EXPR_UNARY_DEREFERENCE:
3344                 return dereference_addr(&expression->unary);
3345         default:
3346                 break;
3347         }
3348         panic("trying to get address of non-lvalue");
3349 }
3350
3351 static ir_node *builtin_constant_to_firm(
3352                 const builtin_constant_expression_t *expression)
3353 {
3354         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3355         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3356         return create_Const_from_bool(mode, v);
3357 }
3358
3359 static ir_node *builtin_types_compatible_to_firm(
3360                 const builtin_types_compatible_expression_t *expression)
3361 {
3362         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3363         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3364         bool     const value = types_compatible(left, right);
3365         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3366         return create_Const_from_bool(mode, value);
3367 }
3368
3369 static ir_node *get_label_block(label_t *label)
3370 {
3371         if (label->block != NULL)
3372                 return label->block;
3373
3374         /* beware: might be called from create initializer with current_ir_graph
3375          * set to const_code_irg. */
3376         ir_graph *rem    = current_ir_graph;
3377         current_ir_graph = current_function;
3378
3379         ir_node *block = new_immBlock();
3380
3381         label->block = block;
3382
3383         ARR_APP1(label_t *, all_labels, label);
3384
3385         current_ir_graph = rem;
3386         return block;
3387 }
3388
3389 /**
3390  * Pointer to a label.  This is used for the
3391  * GNU address-of-label extension.
3392  */
3393 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3394 {
3395         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3396         ir_node   *block  = get_label_block(label->label);
3397         ir_entity *entity = create_Block_entity(block);
3398
3399         symconst_symbol value;
3400         value.entity_p = entity;
3401         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3402 }
3403
3404 /**
3405  * creates firm nodes for an expression. The difference between this function
3406  * and expression_to_firm is, that this version might produce mode_b nodes
3407  * instead of mode_Is.
3408  */
3409 static ir_node *_expression_to_firm(expression_t const *const expr)
3410 {
3411 #ifndef NDEBUG
3412         if (!constant_folding) {
3413                 assert(!expr->base.transformed);
3414                 ((expression_t*)expr)->base.transformed = true;
3415         }
3416 #endif
3417
3418         switch (expr->kind) {
3419         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3420         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3421         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3422         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3423         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3424         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3425         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3426         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3427         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3428         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3429         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3430         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3431         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3432         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3433         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3434         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3435         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3436         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3437         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3438         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3439         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3440         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3441         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3442
3443         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3444
3445         case EXPR_ERROR: break;
3446         }
3447         panic("invalid expression found");
3448 }
3449
3450 /**
3451  * Check if a given expression is a GNU __builtin_expect() call.
3452  */
3453 static bool is_builtin_expect(const expression_t *expression)
3454 {
3455         if (expression->kind != EXPR_CALL)
3456                 return false;
3457
3458         expression_t *function = expression->call.function;
3459         if (function->kind != EXPR_REFERENCE)
3460                 return false;
3461         reference_expression_t *ref = &function->reference;
3462         if (ref->entity->kind         != ENTITY_FUNCTION ||
3463             ref->entity->function.btk != BUILTIN_EXPECT)
3464                 return false;
3465
3466         return true;
3467 }
3468
3469 static bool produces_mode_b(const expression_t *expression)
3470 {
3471         switch (expression->kind) {
3472         case EXPR_BINARY_EQUAL:
3473         case EXPR_BINARY_NOTEQUAL:
3474         case EXPR_BINARY_LESS:
3475         case EXPR_BINARY_LESSEQUAL:
3476         case EXPR_BINARY_GREATER:
3477         case EXPR_BINARY_GREATEREQUAL:
3478         case EXPR_BINARY_ISGREATER:
3479         case EXPR_BINARY_ISGREATEREQUAL:
3480         case EXPR_BINARY_ISLESS:
3481         case EXPR_BINARY_ISLESSEQUAL:
3482         case EXPR_BINARY_ISLESSGREATER:
3483         case EXPR_BINARY_ISUNORDERED:
3484         case EXPR_UNARY_NOT:
3485                 return true;
3486
3487         case EXPR_CALL:
3488                 if (is_builtin_expect(expression)) {
3489                         expression_t *argument = expression->call.arguments->expression;
3490                         return produces_mode_b(argument);
3491                 }
3492                 return false;
3493         case EXPR_BINARY_COMMA:
3494                 return produces_mode_b(expression->binary.right);
3495
3496         default:
3497                 return false;
3498         }
3499 }
3500
3501 static ir_node *expression_to_firm(const expression_t *expression)
3502 {
3503         if (!produces_mode_b(expression)) {
3504                 ir_node *res = _expression_to_firm(expression);
3505                 assert(res == NULL || get_irn_mode(res) != mode_b);
3506                 return res;
3507         }
3508
3509         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3510                 return new_Const(fold_constant_to_tarval(expression));
3511         }
3512
3513         /* we have to produce a 0/1 from the mode_b expression */
3514         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3515         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3516         return produce_condition_result(expression, mode, dbgi);
3517 }
3518
3519 /**
3520  * create a short-circuit expression evaluation that tries to construct
3521  * efficient control flow structures for &&, || and ! expressions
3522  */
3523 static ir_node *create_condition_evaluation(const expression_t *expression,
3524                                             ir_node *true_block,
3525                                             ir_node *false_block)
3526 {
3527         switch(expression->kind) {
3528         case EXPR_UNARY_NOT: {
3529                 const unary_expression_t *unary_expression = &expression->unary;
3530                 create_condition_evaluation(unary_expression->value, false_block,
3531                                             true_block);
3532                 return NULL;
3533         }
3534         case EXPR_BINARY_LOGICAL_AND: {
3535                 const binary_expression_t *binary_expression = &expression->binary;
3536
3537                 ir_node *extra_block = new_immBlock();
3538                 create_condition_evaluation(binary_expression->left, extra_block,
3539                                             false_block);
3540                 mature_immBlock(extra_block);
3541                 set_cur_block(extra_block);
3542                 create_condition_evaluation(binary_expression->right, true_block,
3543                                             false_block);
3544                 return NULL;
3545         }
3546         case EXPR_BINARY_LOGICAL_OR: {
3547                 const binary_expression_t *binary_expression = &expression->binary;
3548
3549                 ir_node *extra_block = new_immBlock();
3550                 create_condition_evaluation(binary_expression->left, true_block,
3551                                             extra_block);
3552                 mature_immBlock(extra_block);
3553                 set_cur_block(extra_block);
3554                 create_condition_evaluation(binary_expression->right, true_block,
3555                                             false_block);
3556                 return NULL;
3557         }
3558         default:
3559                 break;
3560         }
3561
3562         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3563         ir_node  *cond_expr  = _expression_to_firm(expression);
3564         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3565         ir_node  *cond       = new_d_Cond(dbgi, condition);
3566         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3567         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3568
3569         /* set branch prediction info based on __builtin_expect */
3570         if (is_builtin_expect(expression) && is_Cond(cond)) {
3571                 call_argument_t *argument = expression->call.arguments->next;
3572                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3573                         bool               const cnst = fold_constant_to_bool(argument->expression);
3574                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3575                         set_Cond_jmp_pred(cond, pred);
3576                 }
3577         }
3578
3579         add_immBlock_pred(true_block, true_proj);
3580         add_immBlock_pred(false_block, false_proj);
3581
3582         set_unreachable_now();
3583         return cond_expr;
3584 }
3585
3586 static void create_variable_entity(entity_t *variable,
3587                                    declaration_kind_t declaration_kind,
3588                                    ir_type *parent_type)
3589 {
3590         assert(variable->kind == ENTITY_VARIABLE);
3591         type_t    *type = skip_typeref(variable->declaration.type);
3592
3593         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3594         ir_type   *const irtype    = get_ir_type(type);
3595         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3596         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3597         unsigned         alignment = variable->declaration.alignment;
3598
3599         set_entity_alignment(irentity, alignment);
3600
3601         handle_decl_modifiers(irentity, variable);
3602
3603         variable->declaration.kind  = (unsigned char) declaration_kind;
3604         variable->variable.v.entity = irentity;
3605         set_entity_ld_ident(irentity, create_ld_ident(variable));
3606
3607         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3608                 set_entity_volatility(irentity, volatility_is_volatile);
3609         }
3610 }
3611
3612
3613 typedef struct type_path_entry_t type_path_entry_t;
3614 struct type_path_entry_t {
3615         type_t           *type;
3616         ir_initializer_t *initializer;
3617         size_t            index;
3618         entity_t         *compound_entry;
3619 };
3620
3621 typedef struct type_path_t type_path_t;
3622 struct type_path_t {
3623         type_path_entry_t *path;
3624         type_t            *top_type;
3625         bool               invalid;
3626 };
3627
3628 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3629 {
3630         size_t len = ARR_LEN(path->path);
3631
3632         for (size_t i = 0; i < len; ++i) {
3633                 const type_path_entry_t *entry = & path->path[i];
3634
3635                 type_t *type = skip_typeref(entry->type);
3636                 if (is_type_compound(type)) {
3637                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3638                 } else if (is_type_array(type)) {
3639                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3640                 } else {
3641                         fprintf(stderr, "-INVALID-");
3642                 }
3643         }
3644         fprintf(stderr, "  (");
3645         print_type(path->top_type);
3646         fprintf(stderr, ")");
3647 }
3648
3649 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3650 {
3651         size_t len = ARR_LEN(path->path);
3652         assert(len > 0);
3653         return & path->path[len-1];
3654 }
3655
3656 static type_path_entry_t *append_to_type_path(type_path_t *path)
3657 {
3658         size_t len = ARR_LEN(path->path);
3659         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3660
3661         type_path_entry_t *result = & path->path[len];
3662         memset(result, 0, sizeof(result[0]));
3663         return result;
3664 }
3665
3666 static size_t get_compound_member_count(const compound_type_t *type)
3667 {
3668         compound_t *compound  = type->compound;
3669         size_t      n_members = 0;
3670         entity_t   *member    = compound->members.entities;
3671         for ( ; member != NULL; member = member->base.next) {
3672                 ++n_members;
3673         }
3674
3675         return n_members;
3676 }
3677
3678 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3679 {
3680         type_t *orig_top_type = path->top_type;
3681         type_t *top_type      = skip_typeref(orig_top_type);
3682
3683         assert(is_type_compound(top_type) || is_type_array(top_type));
3684
3685         if (ARR_LEN(path->path) == 0) {
3686                 return NULL;
3687         } else {
3688                 type_path_entry_t *top         = get_type_path_top(path);
3689                 ir_initializer_t  *initializer = top->initializer;
3690                 return get_initializer_compound_value(initializer, top->index);
3691         }
3692 }
3693
3694 static void descend_into_subtype(type_path_t *path)
3695 {
3696         type_t *orig_top_type = path->top_type;
3697         type_t *top_type      = skip_typeref(orig_top_type);
3698
3699         assert(is_type_compound(top_type) || is_type_array(top_type));
3700
3701         ir_initializer_t *initializer = get_initializer_entry(path);
3702
3703         type_path_entry_t *top = append_to_type_path(path);
3704         top->type              = top_type;
3705
3706         size_t len;
3707
3708         if (is_type_compound(top_type)) {
3709                 compound_t *const compound = top_type->compound.compound;
3710                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3711
3712                 top->compound_entry = entry;
3713                 top->index          = 0;
3714                 len                 = get_compound_member_count(&top_type->compound);
3715                 if (entry != NULL) {
3716                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3717                         path->top_type = entry->declaration.type;
3718                 }
3719         } else {
3720                 assert(is_type_array(top_type));
3721                 assert(top_type->array.size > 0);
3722
3723                 top->index     = 0;
3724                 path->top_type = top_type->array.element_type;
3725                 len            = top_type->array.size;
3726         }
3727         if (initializer == NULL
3728                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3729                 initializer = create_initializer_compound(len);
3730                 /* we have to set the entry at the 2nd latest path entry... */
3731                 size_t path_len = ARR_LEN(path->path);
3732                 assert(path_len >= 1);
3733                 if (path_len > 1) {
3734                         type_path_entry_t *entry        = & path->path[path_len-2];
3735                         ir_initializer_t  *tinitializer = entry->initializer;
3736                         set_initializer_compound_value(tinitializer, entry->index,
3737                                                        initializer);
3738                 }
3739         }
3740         top->initializer = initializer;
3741 }
3742
3743 static void ascend_from_subtype(type_path_t *path)
3744 {
3745         type_path_entry_t *top = get_type_path_top(path);
3746
3747         path->top_type = top->type;
3748
3749         size_t len = ARR_LEN(path->path);
3750         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3751 }
3752
3753 static void walk_designator(type_path_t *path, const designator_t *designator)
3754 {
3755         /* designators start at current object type */
3756         ARR_RESIZE(type_path_entry_t, path->path, 1);
3757
3758         for ( ; designator != NULL; designator = designator->next) {
3759                 type_path_entry_t *top         = get_type_path_top(path);
3760                 type_t            *orig_type   = top->type;
3761                 type_t            *type        = skip_typeref(orig_type);
3762
3763                 if (designator->symbol != NULL) {
3764                         assert(is_type_compound(type));
3765                         size_t    index  = 0;
3766                         symbol_t *symbol = designator->symbol;
3767
3768                         compound_t *compound = type->compound.compound;
3769                         entity_t   *iter     = compound->members.entities;
3770                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3771                                 if (iter->base.symbol == symbol) {
3772                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3773                                         break;
3774                                 }
3775                         }
3776                         assert(iter != NULL);
3777
3778                         /* revert previous initialisations of other union elements */
3779                         if (type->kind == TYPE_COMPOUND_UNION) {
3780                                 ir_initializer_t *initializer = top->initializer;
3781                                 if (initializer != NULL
3782                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3783                                         /* are we writing to a new element? */
3784                                         ir_initializer_t *oldi
3785                                                 = get_initializer_compound_value(initializer, index);
3786                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3787                                                 /* clear initializer */
3788                                                 size_t len
3789                                                         = get_initializer_compound_n_entries(initializer);
3790                                                 ir_initializer_t *nulli = get_initializer_null();
3791                                                 for (size_t i = 0; i < len; ++i) {
3792                                                         set_initializer_compound_value(initializer, i,
3793                                                                                        nulli);
3794                                                 }
3795                                         }
3796                                 }
3797                         }
3798
3799                         top->type           = orig_type;
3800                         top->compound_entry = iter;
3801                         top->index          = index;
3802                         orig_type           = iter->declaration.type;
3803                 } else {
3804                         expression_t *array_index = designator->array_index;
3805                         assert(designator->array_index != NULL);
3806                         assert(is_type_array(type));
3807
3808                         long index = fold_constant_to_int(array_index);
3809                         assert(index >= 0);
3810 #ifndef NDEBUG
3811                         if (type->array.size_constant) {
3812                                 long array_size = type->array.size;
3813                                 assert(index < array_size);
3814                         }
3815 #endif
3816
3817                         top->type  = orig_type;
3818                         top->index = (size_t) index;
3819                         orig_type  = type->array.element_type;
3820                 }
3821                 path->top_type = orig_type;
3822
3823                 if (designator->next != NULL) {
3824                         descend_into_subtype(path);
3825                 }
3826         }
3827
3828         path->invalid  = false;
3829 }
3830
3831 static void advance_current_object(type_path_t *path)
3832 {
3833         if (path->invalid) {
3834                 /* TODO: handle this... */
3835                 panic("invalid initializer in ast2firm (excessive elements)");
3836         }
3837
3838         type_path_entry_t *top = get_type_path_top(path);
3839
3840         type_t *type = skip_typeref(top->type);
3841         if (is_type_union(type)) {
3842                 /* only the first element is initialized in unions */
3843                 top->compound_entry = NULL;
3844         } else if (is_type_struct(type)) {
3845                 entity_t *entry = top->compound_entry;
3846
3847                 top->index++;
3848                 entry               = skip_unnamed_bitfields(entry->base.next);
3849                 top->compound_entry = entry;
3850                 if (entry != NULL) {
3851                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3852                         path->top_type = entry->declaration.type;
3853                         return;
3854                 }
3855         } else {
3856                 assert(is_type_array(type));
3857
3858                 top->index++;
3859                 if (!type->array.size_constant || top->index < type->array.size) {
3860                         return;
3861                 }
3862         }
3863
3864         /* we're past the last member of the current sub-aggregate, try if we
3865          * can ascend in the type hierarchy and continue with another subobject */
3866         size_t len = ARR_LEN(path->path);
3867
3868         if (len > 1) {
3869                 ascend_from_subtype(path);
3870                 advance_current_object(path);
3871         } else {
3872                 path->invalid = true;
3873         }
3874 }
3875
3876
3877 static ir_initializer_t *create_ir_initializer_value(
3878                 const initializer_value_t *initializer)
3879 {
3880         if (is_type_compound(initializer->value->base.type)) {
3881                 panic("initializer creation for compounds not implemented yet");
3882         }
3883         type_t       *type = initializer->value->base.type;
3884         expression_t *expr = initializer->value;
3885         ir_node *value = expression_to_firm(expr);
3886         ir_mode *mode  = get_ir_mode_storage(type);
3887         value          = create_conv(NULL, value, mode);
3888         return create_initializer_const(value);
3889 }
3890
3891 /** test wether type can be initialized by a string constant */
3892 static bool is_string_type(type_t *type)
3893 {
3894         type_t *inner;
3895         if (is_type_pointer(type)) {
3896                 inner = skip_typeref(type->pointer.points_to);
3897         } else if(is_type_array(type)) {
3898                 inner = skip_typeref(type->array.element_type);
3899         } else {
3900                 return false;
3901         }
3902
3903         return is_type_integer(inner);
3904 }
3905
3906 static ir_initializer_t *create_ir_initializer_list(
3907                 const initializer_list_t *initializer, type_t *type)
3908 {
3909         type_path_t path;
3910         memset(&path, 0, sizeof(path));
3911         path.top_type = type;
3912         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3913
3914         descend_into_subtype(&path);
3915
3916         for (size_t i = 0; i < initializer->len; ++i) {
3917                 const initializer_t *sub_initializer = initializer->initializers[i];
3918
3919                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3920                         walk_designator(&path, sub_initializer->designator.designator);
3921                         continue;
3922                 }
3923
3924                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3925                         /* we might have to descend into types until we're at a scalar
3926                          * type */
3927                         while(true) {
3928                                 type_t *orig_top_type = path.top_type;
3929                                 type_t *top_type      = skip_typeref(orig_top_type);
3930
3931                                 if (is_type_scalar(top_type))
3932                                         break;
3933                                 descend_into_subtype(&path);
3934                         }
3935                 } else if (sub_initializer->kind == INITIALIZER_STRING
3936                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3937                         /* we might have to descend into types until we're at a scalar
3938                          * type */
3939                         while (true) {
3940                                 type_t *orig_top_type = path.top_type;
3941                                 type_t *top_type      = skip_typeref(orig_top_type);
3942
3943                                 if (is_string_type(top_type))
3944                                         break;
3945                                 descend_into_subtype(&path);
3946                         }
3947                 }
3948
3949                 ir_initializer_t *sub_irinitializer
3950                         = create_ir_initializer(sub_initializer, path.top_type);
3951
3952                 size_t path_len = ARR_LEN(path.path);
3953                 assert(path_len >= 1);
3954                 type_path_entry_t *entry        = & path.path[path_len-1];
3955                 ir_initializer_t  *tinitializer = entry->initializer;
3956                 set_initializer_compound_value(tinitializer, entry->index,
3957                                                sub_irinitializer);
3958
3959                 advance_current_object(&path);
3960         }
3961
3962         assert(ARR_LEN(path.path) >= 1);
3963         ir_initializer_t *result = path.path[0].initializer;
3964         DEL_ARR_F(path.path);
3965
3966         return result;
3967 }
3968
3969 static ir_initializer_t *create_ir_initializer_string(
3970                 const initializer_string_t *initializer, type_t *type)
3971 {
3972         type = skip_typeref(type);
3973
3974         size_t            string_len    = initializer->string.size;
3975         assert(type->kind == TYPE_ARRAY);
3976         assert(type->array.size_constant);
3977         size_t            len           = type->array.size;
3978         ir_initializer_t *irinitializer = create_initializer_compound(len);
3979
3980         const char *string = initializer->string.begin;
3981         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3982
3983         for (size_t i = 0; i < len; ++i) {
3984                 char c = 0;
3985                 if (i < string_len)
3986                         c = string[i];
3987
3988                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3989                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3990
3991                 set_initializer_compound_value(irinitializer, i, char_initializer);
3992         }
3993
3994         return irinitializer;
3995 }
3996
3997 static ir_initializer_t *create_ir_initializer_wide_string(
3998                 const initializer_wide_string_t *initializer, type_t *type)
3999 {
4000         assert(type->kind == TYPE_ARRAY);
4001         assert(type->array.size_constant);
4002         size_t            len           = type->array.size;
4003         size_t            string_len    = wstrlen(&initializer->string);
4004         ir_initializer_t *irinitializer = create_initializer_compound(len);
4005
4006         const char *p    = initializer->string.begin;
4007         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4008
4009         for (size_t i = 0; i < len; ++i) {
4010                 utf32 c = 0;
4011                 if (i < string_len) {
4012                         c = read_utf8_char(&p);
4013                 }
4014                 ir_tarval *tv = new_tarval_from_long(c, mode);
4015                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4016
4017                 set_initializer_compound_value(irinitializer, i, char_initializer);
4018         }
4019
4020         return irinitializer;
4021 }
4022
4023 static ir_initializer_t *create_ir_initializer(
4024                 const initializer_t *initializer, type_t *type)
4025 {
4026         switch(initializer->kind) {
4027                 case INITIALIZER_STRING:
4028                         return create_ir_initializer_string(&initializer->string, type);
4029
4030                 case INITIALIZER_WIDE_STRING:
4031                         return create_ir_initializer_wide_string(&initializer->wide_string,
4032                                                                  type);
4033
4034                 case INITIALIZER_LIST:
4035                         return create_ir_initializer_list(&initializer->list, type);
4036
4037                 case INITIALIZER_VALUE:
4038                         return create_ir_initializer_value(&initializer->value);
4039
4040                 case INITIALIZER_DESIGNATOR:
4041                         panic("unexpected designator initializer found");
4042         }
4043         panic("unknown initializer");
4044 }
4045
4046 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4047  *  are elements [...] the remainder of the aggregate shall be initialized
4048  *  implicitly the same as objects that have static storage duration. */
4049 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4050                 ir_node *base_addr)
4051 {
4052         /* for unions we must NOT do anything for null initializers */
4053         ir_type *owner = get_entity_owner(entity);
4054         if (is_Union_type(owner)) {
4055                 return;
4056         }
4057
4058         ir_type *ent_type = get_entity_type(entity);
4059         /* create sub-initializers for a compound type */
4060         if (is_compound_type(ent_type)) {
4061                 unsigned n_members = get_compound_n_members(ent_type);
4062                 for (unsigned n = 0; n < n_members; ++n) {
4063                         ir_entity *member = get_compound_member(ent_type, n);
4064                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4065                                                                 member);
4066                         create_dynamic_null_initializer(member, dbgi, addr);
4067                 }
4068                 return;
4069         }
4070         if (is_Array_type(ent_type)) {
4071                 assert(has_array_upper_bound(ent_type, 0));
4072                 long n = get_array_upper_bound_int(ent_type, 0);
4073                 for (long i = 0; i < n; ++i) {
4074                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4075                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4076                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4077                         ir_node   *in[1]    = { cnst };
4078                         ir_entity *arrent   = get_array_element_entity(ent_type);
4079                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4080                                                         arrent);
4081                         create_dynamic_null_initializer(arrent, dbgi, addr);
4082                 }
4083                 return;
4084         }
4085
4086         ir_mode *value_mode = get_type_mode(ent_type);
4087         ir_node *node       = new_Const(get_mode_null(value_mode));
4088
4089         /* is it a bitfield type? */
4090         if (is_Primitive_type(ent_type) &&
4091                         get_primitive_base_type(ent_type) != NULL) {
4092                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4093                 return;
4094         }
4095
4096         ir_node *mem    = get_store();
4097         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4098         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4099         set_store(proj_m);
4100 }
4101
4102 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4103                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4104 {
4105         switch(get_initializer_kind(initializer)) {
4106         case IR_INITIALIZER_NULL:
4107                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4108                 return;
4109         case IR_INITIALIZER_CONST: {
4110                 ir_node *node     = get_initializer_const_value(initializer);
4111                 ir_type *ent_type = get_entity_type(entity);
4112
4113                 /* is it a bitfield type? */
4114                 if (is_Primitive_type(ent_type) &&
4115                                 get_primitive_base_type(ent_type) != NULL) {
4116                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4117                         return;
4118                 }
4119
4120                 assert(get_type_mode(type) == get_irn_mode(node));
4121                 ir_node *mem    = get_store();
4122                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4123                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4124                 set_store(proj_m);
4125                 return;
4126         }
4127         case IR_INITIALIZER_TARVAL: {
4128                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4129                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4130                 ir_type   *ent_type = get_entity_type(entity);
4131
4132                 /* is it a bitfield type? */
4133                 if (is_Primitive_type(ent_type) &&
4134                                 get_primitive_base_type(ent_type) != NULL) {
4135                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4136                         return;
4137                 }
4138
4139                 assert(get_type_mode(type) == get_tarval_mode(tv));
4140                 ir_node *mem    = get_store();
4141                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4142                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4143                 set_store(proj_m);
4144                 return;
4145         }
4146         case IR_INITIALIZER_COMPOUND: {
4147                 assert(is_compound_type(type) || is_Array_type(type));
4148                 int n_members;
4149                 if (is_Array_type(type)) {
4150                         assert(has_array_upper_bound(type, 0));
4151                         n_members = get_array_upper_bound_int(type, 0);
4152                 } else {
4153                         n_members = get_compound_n_members(type);
4154                 }
4155
4156                 if (get_initializer_compound_n_entries(initializer)
4157                                 != (unsigned) n_members)
4158                         panic("initializer doesn't match compound type");
4159
4160                 for (int i = 0; i < n_members; ++i) {
4161                         ir_node   *addr;
4162                         ir_type   *irtype;
4163                         ir_entity *sub_entity;
4164                         if (is_Array_type(type)) {
4165                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4166                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4167                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4168                                 ir_node   *in[1]    = { cnst };
4169                                 irtype     = get_array_element_type(type);
4170                                 sub_entity = get_array_element_entity(type);
4171                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4172                                                        sub_entity);
4173                         } else {
4174                                 sub_entity = get_compound_member(type, i);
4175                                 irtype     = get_entity_type(sub_entity);
4176                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4177                                                              sub_entity);
4178                         }
4179
4180                         ir_initializer_t *sub_init
4181                                 = get_initializer_compound_value(initializer, i);
4182
4183                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4184                                                        addr);
4185                 }
4186                 return;
4187         }
4188         }
4189
4190         panic("invalid IR_INITIALIZER found");
4191 }
4192
4193 static void create_dynamic_initializer(ir_initializer_t *initializer,
4194                 dbg_info *dbgi, ir_entity *entity)
4195 {
4196         ir_node *frame     = get_irg_frame(current_ir_graph);
4197         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4198         ir_type *type      = get_entity_type(entity);
4199
4200         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4201 }
4202
4203 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4204                                      ir_entity *entity, type_t *type)
4205 {
4206         ir_node *memory = get_store();
4207         ir_node *nomem  = new_NoMem();
4208         ir_node *frame  = get_irg_frame(current_ir_graph);
4209         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4210
4211         if (initializer->kind == INITIALIZER_VALUE) {
4212                 initializer_value_t *initializer_value = &initializer->value;
4213
4214                 ir_node *value = expression_to_firm(initializer_value->value);
4215                 type = skip_typeref(type);
4216                 assign_value(dbgi, addr, type, value);
4217                 return;
4218         }
4219
4220         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4221                 ir_initializer_t *irinitializer
4222                         = create_ir_initializer(initializer, type);
4223
4224                 create_dynamic_initializer(irinitializer, dbgi, entity);
4225                 return;
4226         }
4227
4228         /* create a "template" entity which is copied to the entity on the stack */
4229         ir_entity *const init_entity
4230                 = create_initializer_entity(dbgi, initializer, type);
4231         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4232         ir_type *const irtype   = get_ir_type(type);
4233         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4234
4235         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4236         set_store(copyb_mem);
4237 }
4238
4239 static void create_initializer_local_variable_entity(entity_t *entity)
4240 {
4241         assert(entity->kind == ENTITY_VARIABLE);
4242         initializer_t *initializer = entity->variable.initializer;
4243         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4244         ir_entity     *irentity    = entity->variable.v.entity;
4245         type_t        *type        = entity->declaration.type;
4246
4247         create_local_initializer(initializer, dbgi, irentity, type);
4248 }
4249
4250 static void create_variable_initializer(entity_t *entity)
4251 {
4252         assert(entity->kind == ENTITY_VARIABLE);
4253         initializer_t *initializer = entity->variable.initializer;
4254         if (initializer == NULL)
4255                 return;
4256
4257         declaration_kind_t declaration_kind
4258                 = (declaration_kind_t) entity->declaration.kind;
4259         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4260                 create_initializer_local_variable_entity(entity);
4261                 return;
4262         }
4263
4264         type_t            *type = entity->declaration.type;
4265         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4266
4267         if (initializer->kind == INITIALIZER_VALUE) {
4268                 expression_t *      value     = initializer->value.value;
4269                 type_t       *const init_type = skip_typeref(value->base.type);
4270
4271                 if (!is_type_scalar(init_type)) {
4272                         /* skip convs */
4273                         while (value->kind == EXPR_UNARY_CAST)
4274                                 value = value->unary.value;
4275
4276                         if (value->kind != EXPR_COMPOUND_LITERAL)
4277                                 panic("expected non-scalar initializer to be a compound literal");
4278                         initializer = value->compound_literal.initializer;
4279                         goto have_initializer;
4280                 }
4281
4282                 ir_node  *      node = expression_to_firm(value);
4283                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4284                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4285                 node = create_conv(dbgi, node, mode);
4286                 node = do_strict_conv(dbgi, node);
4287
4288                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4289                         set_value(entity->variable.v.value_number, node);
4290                 } else {
4291                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4292
4293                         ir_entity *irentity = entity->variable.v.entity;
4294
4295                         if (tq & TYPE_QUALIFIER_CONST
4296                                         && get_entity_owner(irentity) != get_tls_type()) {
4297                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4298                         }
4299                         set_atomic_ent_value(irentity, node);
4300                 }
4301         } else {
4302 have_initializer:
4303                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4304                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4305
4306                 ir_entity        *irentity        = entity->variable.v.entity;
4307                 ir_initializer_t *irinitializer
4308                         = create_ir_initializer(initializer, type);
4309
4310                 if (tq & TYPE_QUALIFIER_CONST) {
4311                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4312                 }
4313                 set_entity_initializer(irentity, irinitializer);
4314         }
4315 }
4316
4317 static void create_variable_length_array(entity_t *entity)
4318 {
4319         assert(entity->kind == ENTITY_VARIABLE);
4320         assert(entity->variable.initializer == NULL);
4321
4322         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4323         entity->variable.v.vla_base = NULL;
4324
4325         /* TODO: record VLA somewhere so we create the free node when we leave
4326          * it's scope */
4327 }
4328
4329 static void allocate_variable_length_array(entity_t *entity)
4330 {
4331         assert(entity->kind == ENTITY_VARIABLE);
4332         assert(entity->variable.initializer == NULL);
4333         assert(currently_reachable());
4334
4335         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4336         type_t   *type      = entity->declaration.type;
4337         ir_type  *el_type   = get_ir_type(type->array.element_type);
4338
4339         /* make sure size_node is calculated */
4340         get_type_size_node(type);
4341         ir_node  *elems = type->array.size_node;
4342         ir_node  *mem   = get_store();
4343         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4344
4345         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4346         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4347         set_store(proj_m);
4348
4349         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4350         entity->variable.v.vla_base = addr;
4351 }
4352
4353 /**
4354  * Creates a Firm local variable from a declaration.
4355  */
4356 static void create_local_variable(entity_t *entity)
4357 {
4358         assert(entity->kind == ENTITY_VARIABLE);
4359         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4360
4361         bool needs_entity = entity->variable.address_taken;
4362         type_t *type = skip_typeref(entity->declaration.type);
4363
4364         /* is it a variable length array? */
4365         if (is_type_array(type) && !type->array.size_constant) {
4366                 create_variable_length_array(entity);
4367                 return;
4368         } else if (is_type_array(type) || is_type_compound(type)) {
4369                 needs_entity = true;
4370         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4371                 needs_entity = true;
4372         }
4373
4374         if (needs_entity) {
4375                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4376                 create_variable_entity(entity,
4377                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4378                                        frame_type);
4379         } else {
4380                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4381                 entity->variable.v.value_number = next_value_number_function;
4382                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4383                                         entity);
4384                 ++next_value_number_function;
4385         }
4386 }
4387
4388 static void create_local_static_variable(entity_t *entity)
4389 {
4390         assert(entity->kind == ENTITY_VARIABLE);
4391         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4392
4393         type_t   *type           = skip_typeref(entity->declaration.type);
4394         ir_type  *const var_type = entity->variable.thread_local ?
4395                 get_tls_type() : get_glob_type();
4396         ir_type  *const irtype   = get_ir_type(type);
4397         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4398
4399         size_t l = strlen(entity->base.symbol->string);
4400         char   buf[l + sizeof(".%u")];
4401         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4402         ident     *const id       = id_unique(buf);
4403         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4404
4405         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4406                 set_entity_volatility(irentity, volatility_is_volatile);
4407         }
4408
4409         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4410         entity->variable.v.entity = irentity;
4411
4412         set_entity_ld_ident(irentity, id);
4413         set_entity_visibility(irentity, ir_visibility_local);
4414
4415         ir_graph *const old_current_ir_graph = current_ir_graph;
4416         current_ir_graph = get_const_code_irg();
4417
4418         create_variable_initializer(entity);
4419
4420         assert(current_ir_graph == get_const_code_irg());
4421         current_ir_graph = old_current_ir_graph;
4422 }
4423
4424
4425
4426 static ir_node *return_statement_to_firm(return_statement_t *statement)
4427 {
4428         if (!currently_reachable())
4429                 return NULL;
4430
4431         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4432         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4433         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4434
4435         int in_len;
4436         if (!is_type_void(type)) {
4437                 ir_mode *const mode = get_ir_mode_storage(type);
4438                 if (res) {
4439                         res = create_conv(dbgi, res, mode);
4440                         res = do_strict_conv(dbgi, res);
4441                 } else {
4442                         res = new_Unknown(mode);
4443                 }
4444                 in_len = 1;
4445         } else {
4446                 in_len = 0;
4447         }
4448
4449         ir_node *const in[1] = { res };
4450         ir_node *const store = get_store();
4451         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4452
4453         ir_node *end_block = get_irg_end_block(current_ir_graph);
4454         add_immBlock_pred(end_block, ret);
4455
4456         set_unreachable_now();
4457         return NULL;
4458 }
4459
4460 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4461 {
4462         if (!currently_reachable())
4463                 return NULL;
4464
4465         return expression_to_firm(statement->expression);
4466 }
4467
4468 static void create_local_declarations(entity_t*);
4469
4470 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4471 {
4472         create_local_declarations(compound->scope.entities);
4473
4474         ir_node     *result    = NULL;
4475         statement_t *statement = compound->statements;
4476         for ( ; statement != NULL; statement = statement->base.next) {
4477                 result = statement_to_firm(statement);
4478         }
4479
4480         return result;
4481 }
4482
4483 static void create_global_variable(entity_t *entity)
4484 {
4485         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4486         ir_visibility visibility = ir_visibility_default;
4487         ir_entity    *irentity;
4488         assert(entity->kind == ENTITY_VARIABLE);
4489
4490         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4491         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4492         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4493         case STORAGE_CLASS_NONE:
4494                 visibility = ir_visibility_default;
4495                 /* uninitialized globals get merged in C */
4496                 if (entity->variable.initializer == NULL)
4497                         linkage |= IR_LINKAGE_MERGE;
4498                 break;
4499         case STORAGE_CLASS_TYPEDEF:
4500         case STORAGE_CLASS_AUTO:
4501         case STORAGE_CLASS_REGISTER:
4502                 panic("invalid storage class for global var");
4503         }
4504
4505         ir_type *var_type = get_glob_type();
4506         if (entity->variable.thread_local) {
4507                 var_type = get_tls_type();
4508                 /* LINKAGE_MERGE not supported by current linkers */
4509                 linkage &= ~IR_LINKAGE_MERGE;
4510         }
4511         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4512         irentity = entity->variable.v.entity;
4513         add_entity_linkage(irentity, linkage);
4514         set_entity_visibility(irentity, visibility);
4515 }
4516
4517 static void create_local_declaration(entity_t *entity)
4518 {
4519         assert(is_declaration(entity));
4520
4521         /* construct type */
4522         (void) get_ir_type(entity->declaration.type);
4523         if (entity->base.symbol == NULL) {
4524                 return;
4525         }
4526
4527         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4528         case STORAGE_CLASS_STATIC:
4529                 if (entity->kind == ENTITY_FUNCTION) {
4530                         (void)get_function_entity(entity, NULL);
4531                 } else {
4532                         create_local_static_variable(entity);
4533                 }
4534                 return;
4535         case STORAGE_CLASS_EXTERN:
4536                 if (entity->kind == ENTITY_FUNCTION) {
4537                         assert(entity->function.statement == NULL);
4538                         (void)get_function_entity(entity, NULL);
4539                 } else {
4540                         create_global_variable(entity);
4541                         create_variable_initializer(entity);
4542                 }
4543                 return;
4544         case STORAGE_CLASS_NONE:
4545         case STORAGE_CLASS_AUTO:
4546         case STORAGE_CLASS_REGISTER:
4547                 if (entity->kind == ENTITY_FUNCTION) {
4548                         if (entity->function.statement != NULL) {
4549                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4550                                 (void)get_function_entity(entity, owner);
4551                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4552                                 enqueue_inner_function(entity);
4553                         } else {
4554                                 (void)get_function_entity(entity, NULL);
4555                         }
4556                 } else {
4557                         create_local_variable(entity);
4558                 }
4559                 return;
4560         case STORAGE_CLASS_TYPEDEF:
4561                 break;
4562         }
4563         panic("invalid storage class found");
4564 }
4565
4566 static void create_local_declarations(entity_t *e)
4567 {
4568         for (; e; e = e->base.next) {
4569                 if (is_declaration(e))
4570                         create_local_declaration(e);
4571         }
4572 }
4573
4574 static void initialize_local_declaration(entity_t *entity)
4575 {
4576         if (entity->base.symbol == NULL)
4577                 return;
4578
4579         // no need to emit code in dead blocks
4580         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4581                         && !currently_reachable())
4582                 return;
4583
4584         switch ((declaration_kind_t) entity->declaration.kind) {
4585         case DECLARATION_KIND_LOCAL_VARIABLE:
4586         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4587                 create_variable_initializer(entity);
4588                 return;
4589
4590         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4591                 allocate_variable_length_array(entity);
4592                 return;
4593
4594         case DECLARATION_KIND_COMPOUND_MEMBER:
4595         case DECLARATION_KIND_GLOBAL_VARIABLE:
4596         case DECLARATION_KIND_FUNCTION:
4597         case DECLARATION_KIND_INNER_FUNCTION:
4598                 return;
4599
4600         case DECLARATION_KIND_PARAMETER:
4601         case DECLARATION_KIND_PARAMETER_ENTITY:
4602                 panic("can't initialize parameters");
4603
4604         case DECLARATION_KIND_UNKNOWN:
4605                 panic("can't initialize unknown declaration");
4606         }
4607         panic("invalid declaration kind");
4608 }
4609
4610 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4611 {
4612         entity_t *entity = statement->declarations_begin;
4613         if (entity == NULL)
4614                 return NULL;
4615
4616         entity_t *const last = statement->declarations_end;
4617         for ( ;; entity = entity->base.next) {
4618                 if (is_declaration(entity)) {
4619                         initialize_local_declaration(entity);
4620                 } else if (entity->kind == ENTITY_TYPEDEF) {
4621                         /* §6.7.7:3  Any array size expressions associated with variable length
4622                          * array declarators are evaluated each time the declaration of the
4623                          * typedef name is reached in the order of execution. */
4624                         type_t *const type = skip_typeref(entity->typedefe.type);
4625                         if (is_type_array(type) && type->array.is_vla)
4626                                 get_vla_size(&type->array);
4627                 }
4628                 if (entity == last)
4629                         break;
4630         }
4631
4632         return NULL;
4633 }
4634
4635 static ir_node *if_statement_to_firm(if_statement_t *statement)
4636 {
4637         /* Create the condition. */
4638         ir_node *true_block  = NULL;
4639         ir_node *false_block = NULL;
4640         if (currently_reachable()) {
4641                 true_block  = new_immBlock();
4642                 false_block = new_immBlock();
4643                 create_condition_evaluation(statement->condition, true_block, false_block);
4644                 mature_immBlock(true_block);
4645                 mature_immBlock(false_block);
4646         }
4647
4648         /* Create the true statement. */
4649         set_cur_block(true_block);
4650         statement_to_firm(statement->true_statement);
4651         ir_node *fallthrough_block = get_cur_block();
4652
4653         /* Create the false statement. */
4654         set_cur_block(false_block);
4655         if (statement->false_statement != NULL) {
4656                 statement_to_firm(statement->false_statement);
4657         }
4658
4659         /* Handle the block after the if-statement.  Minor simplification and
4660          * optimisation: Reuse the false/true block as fallthrough block, if the
4661          * true/false statement does not pass control to the fallthrough block, e.g.
4662          * in the typical if (x) return; pattern. */
4663         if (fallthrough_block) {
4664                 if (currently_reachable()) {
4665                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4666                         ir_node *const f_jump = new_Jmp();
4667                         ir_node *const in[]   = { t_jump, f_jump };
4668                         fallthrough_block = new_Block(2, in);
4669                 }
4670                 set_cur_block(fallthrough_block);
4671         }
4672
4673         return NULL;
4674 }
4675
4676 /**
4677  * Add an unconditional jump to the target block.  If the source block is not
4678  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4679  * loops.  This is necessary if the jump potentially enters a loop.
4680  */
4681 static void jump_to(ir_node *const target_block)
4682 {
4683         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4684         add_immBlock_pred(target_block, pred);
4685 }
4686
4687 /**
4688  * Add an unconditional jump to the target block, if the current block is
4689  * reachable and do nothing otherwise.  This is only valid if the jump does not
4690  * enter a loop (a back edge is ok).
4691  */
4692 static void jump_if_reachable(ir_node *const target_block)
4693 {
4694         if (currently_reachable())
4695                 add_immBlock_pred(target_block, new_Jmp());
4696 }
4697
4698 static ir_node *while_statement_to_firm(while_statement_t *statement)
4699 {
4700         /* Create the header block */
4701         ir_node *const header_block = new_immBlock();
4702         jump_to(header_block);
4703
4704         /* Create the condition. */
4705         ir_node      *      body_block;
4706         ir_node      *      false_block;
4707         expression_t *const cond = statement->condition;
4708         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4709                         fold_constant_to_bool(cond)) {
4710                 /* Shortcut for while (true). */
4711                 body_block  = header_block;
4712                 false_block = NULL;
4713
4714                 keep_alive(header_block);
4715                 keep_all_memory(header_block);
4716         } else {
4717                 body_block  = new_immBlock();
4718                 false_block = new_immBlock();
4719
4720                 set_cur_block(header_block);
4721                 create_condition_evaluation(cond, body_block, false_block);
4722                 mature_immBlock(body_block);
4723         }
4724
4725         ir_node *const old_continue_label = continue_label;
4726         ir_node *const old_break_label    = break_label;
4727         continue_label = header_block;
4728         break_label    = false_block;
4729
4730         /* Create the loop body. */
4731         set_cur_block(body_block);
4732         statement_to_firm(statement->body);
4733         jump_if_reachable(header_block);
4734
4735         mature_immBlock(header_block);
4736         assert(false_block == NULL || false_block == break_label);
4737         false_block = break_label;
4738         if (false_block != NULL) {
4739                 mature_immBlock(false_block);
4740         }
4741         set_cur_block(false_block);
4742
4743         assert(continue_label == header_block);
4744         continue_label = old_continue_label;
4745         break_label    = old_break_label;
4746         return NULL;
4747 }
4748
4749 static ir_node *get_break_label(void)
4750 {
4751         if (break_label == NULL) {
4752                 break_label = new_immBlock();
4753         }
4754         return break_label;
4755 }
4756
4757 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4758 {
4759         /* create the header block */
4760         ir_node *header_block = new_immBlock();
4761
4762         /* the loop body */
4763         ir_node *body_block = new_immBlock();
4764         jump_to(body_block);
4765
4766         ir_node *old_continue_label = continue_label;
4767         ir_node *old_break_label    = break_label;
4768         continue_label              = header_block;
4769         break_label                 = NULL;
4770
4771         set_cur_block(body_block);
4772         statement_to_firm(statement->body);
4773         ir_node *const false_block = get_break_label();
4774
4775         assert(continue_label == header_block);
4776         continue_label = old_continue_label;
4777         break_label    = old_break_label;
4778
4779         jump_if_reachable(header_block);
4780
4781         /* create the condition */
4782         mature_immBlock(header_block);
4783         set_cur_block(header_block);
4784
4785         create_condition_evaluation(statement->condition, body_block, false_block);
4786         mature_immBlock(body_block);
4787         mature_immBlock(false_block);
4788
4789         set_cur_block(false_block);
4790         return NULL;
4791 }
4792
4793 static ir_node *for_statement_to_firm(for_statement_t *statement)
4794 {
4795         create_local_declarations(statement->scope.entities);
4796
4797         if (currently_reachable()) {
4798                 entity_t *entity = statement->scope.entities;
4799                 for ( ; entity != NULL; entity = entity->base.next) {
4800                         if (!is_declaration(entity))
4801                                 continue;
4802
4803                         initialize_local_declaration(entity);
4804                 }
4805
4806                 if (statement->initialisation != NULL) {
4807                         expression_to_firm(statement->initialisation);
4808                 }
4809         }
4810
4811         /* Create the header block */
4812         ir_node *const header_block = new_immBlock();
4813         jump_to(header_block);
4814
4815         /* Create the condition. */
4816         ir_node *body_block;
4817         ir_node *false_block;
4818         if (statement->condition != NULL) {
4819                 body_block  = new_immBlock();
4820                 false_block = new_immBlock();
4821
4822                 set_cur_block(header_block);
4823                 create_condition_evaluation(statement->condition, body_block, false_block);
4824                 mature_immBlock(body_block);
4825         } else {
4826                 /* for-ever. */
4827                 body_block  = header_block;
4828                 false_block = NULL;
4829
4830                 keep_alive(header_block);
4831                 keep_all_memory(header_block);
4832         }
4833
4834         /* Create the step block, if necessary. */
4835         ir_node      *      step_block = header_block;
4836         expression_t *const step       = statement->step;
4837         if (step != NULL) {
4838                 step_block = new_immBlock();
4839         }
4840
4841         ir_node *const old_continue_label = continue_label;
4842         ir_node *const old_break_label    = break_label;
4843         continue_label = step_block;
4844         break_label    = false_block;
4845
4846         /* Create the loop body. */
4847         set_cur_block(body_block);
4848         statement_to_firm(statement->body);
4849         jump_if_reachable(step_block);
4850
4851         /* Create the step code. */
4852         if (step != NULL) {
4853                 mature_immBlock(step_block);
4854                 set_cur_block(step_block);
4855                 expression_to_firm(step);
4856                 jump_if_reachable(header_block);
4857         }
4858
4859         mature_immBlock(header_block);
4860         assert(false_block == NULL || false_block == break_label);
4861         false_block = break_label;
4862         if (false_block != NULL) {
4863                 mature_immBlock(false_block);
4864         }
4865         set_cur_block(false_block);
4866
4867         assert(continue_label == step_block);
4868         continue_label = old_continue_label;
4869         break_label    = old_break_label;
4870         return NULL;
4871 }
4872
4873 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4874 {
4875         if (!currently_reachable())
4876                 return NULL;
4877
4878         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4879         ir_node  *jump = new_d_Jmp(dbgi);
4880         add_immBlock_pred(target_block, jump);
4881
4882         set_unreachable_now();
4883         return NULL;
4884 }
4885
4886 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4887 {
4888         /* determine number of cases */
4889         size_t n_cases = 0;
4890         for (case_label_statement_t *l = statement->first_case; l != NULL;
4891              l = l->next) {
4892                 /* default case */
4893                 if (l->expression == NULL)
4894                         continue;
4895                 if (l->is_empty_range)
4896                         continue;
4897                 ++n_cases;
4898         }
4899
4900         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4901         size_t           i   = 0;
4902         for (case_label_statement_t *l = statement->first_case; l != NULL;
4903              l = l->next) {
4904             if (l->expression == NULL) {
4905                         l->pn = pn_Switch_default;
4906                         continue;
4907                 }
4908                 if (l->is_empty_range)
4909                         continue;
4910                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4911                 ir_tarval *max = min;
4912                 long       pn  = (long) i+1;
4913                 if (l->end_range != NULL)
4914                         max = fold_constant_to_tarval(l->end_range);
4915                 ir_switch_table_set(res, i++, min, max, pn);
4916                 l->pn = pn;
4917         }
4918         return res;
4919 }
4920
4921 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4922 {
4923         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4924         ir_node  *switch_node = NULL;
4925
4926         if (currently_reachable()) {
4927                 ir_node *expression = expression_to_firm(statement->expression);
4928                 ir_switch_table *table = create_switch_table(statement);
4929                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4930
4931                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4932         }
4933
4934         set_unreachable_now();
4935
4936         ir_node *const old_switch            = current_switch;
4937         ir_node *const old_break_label       = break_label;
4938         const bool     old_saw_default_label = saw_default_label;
4939         saw_default_label                    = false;
4940         current_switch                       = switch_node;
4941         break_label                          = NULL;
4942
4943         statement_to_firm(statement->body);
4944
4945         if (currently_reachable()) {
4946                 add_immBlock_pred(get_break_label(), new_Jmp());
4947         }
4948
4949         if (!saw_default_label && switch_node) {
4950                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4951                 add_immBlock_pred(get_break_label(), proj);
4952         }
4953
4954         if (break_label != NULL) {
4955                 mature_immBlock(break_label);
4956         }
4957         set_cur_block(break_label);
4958
4959         assert(current_switch == switch_node);
4960         current_switch    = old_switch;
4961         break_label       = old_break_label;
4962         saw_default_label = old_saw_default_label;
4963         return NULL;
4964 }
4965
4966 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4967 {
4968         if (statement->is_empty_range)
4969                 return NULL;
4970
4971         if (current_switch != NULL) {
4972                 ir_node *block = new_immBlock();
4973                 /* Fallthrough from previous case */
4974                 jump_if_reachable(block);
4975
4976                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4977                 add_immBlock_pred(block, proj);
4978                 if (statement->expression == NULL)
4979                         saw_default_label = true;
4980
4981                 mature_immBlock(block);
4982                 set_cur_block(block);
4983         }
4984
4985         return statement_to_firm(statement->statement);
4986 }
4987
4988 static ir_node *label_to_firm(const label_statement_t *statement)
4989 {
4990         ir_node *block = get_label_block(statement->label);
4991         jump_to(block);
4992
4993         set_cur_block(block);
4994         keep_alive(block);
4995         keep_all_memory(block);
4996
4997         return statement_to_firm(statement->statement);
4998 }
4999
5000 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5001 {
5002         if (!currently_reachable())
5003                 return NULL;
5004
5005         ir_node  *const irn  = expression_to_firm(statement->expression);
5006         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5007         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
5008
5009         set_irn_link(ijmp, ijmp_list);
5010         ijmp_list = ijmp;
5011
5012         set_unreachable_now();
5013         return NULL;
5014 }
5015
5016 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5017 {
5018         bool needs_memory = false;
5019
5020         if (statement->is_volatile) {
5021                 needs_memory = true;
5022         }
5023
5024         size_t         n_clobbers = 0;
5025         asm_clobber_t *clobber    = statement->clobbers;
5026         for ( ; clobber != NULL; clobber = clobber->next) {
5027                 const char *clobber_str = clobber->clobber.begin;
5028
5029                 if (!be_is_valid_clobber(clobber_str)) {
5030                         errorf(&statement->base.source_position,
5031                                    "invalid clobber '%s' specified", clobber->clobber);
5032                         continue;
5033                 }
5034
5035                 if (streq(clobber_str, "memory")) {
5036                         needs_memory = true;
5037                         continue;
5038                 }
5039
5040                 ident *id = new_id_from_str(clobber_str);
5041                 obstack_ptr_grow(&asm_obst, id);
5042                 ++n_clobbers;
5043         }
5044         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5045         ident **clobbers = NULL;
5046         if (n_clobbers > 0) {
5047                 clobbers = obstack_finish(&asm_obst);
5048         }
5049
5050         size_t n_inputs  = 0;
5051         asm_argument_t *argument = statement->inputs;
5052         for ( ; argument != NULL; argument = argument->next)
5053                 n_inputs++;
5054         size_t n_outputs = 0;
5055         argument = statement->outputs;
5056         for ( ; argument != NULL; argument = argument->next)
5057                 n_outputs++;
5058
5059         unsigned next_pos = 0;
5060
5061         ir_node *ins[n_inputs + n_outputs + 1];
5062         size_t   in_size = 0;
5063
5064         ir_asm_constraint tmp_in_constraints[n_outputs];
5065
5066         const expression_t *out_exprs[n_outputs];
5067         ir_node            *out_addrs[n_outputs];
5068         size_t              out_size = 0;
5069
5070         argument = statement->outputs;
5071         for ( ; argument != NULL; argument = argument->next) {
5072                 const char *constraints = argument->constraints.begin;
5073                 asm_constraint_flags_t asm_flags
5074                         = be_parse_asm_constraints(constraints);
5075
5076                 {
5077                         source_position_t const *const pos = &statement->base.source_position;
5078                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5079                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5080                         }
5081                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5082                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5083                                 continue;
5084                         }
5085                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5086                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5087                                 continue;
5088                         }
5089                 }
5090
5091                 unsigned pos = next_pos++;
5092                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5093                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5094                         expression_t *expr = argument->expression;
5095                         ir_node      *addr = expression_to_addr(expr);
5096                         /* in+output, construct an artifical same_as constraint on the
5097                          * input */
5098                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5099                                 char     buf[64];
5100                                 ir_node *value = get_value_from_lvalue(expr, addr);
5101
5102                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5103
5104                                 ir_asm_constraint constraint;
5105                                 constraint.pos              = pos;
5106                                 constraint.constraint       = new_id_from_str(buf);
5107                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5108                                 tmp_in_constraints[in_size] = constraint;
5109                                 ins[in_size] = value;
5110
5111                                 ++in_size;
5112                         }
5113
5114                         out_exprs[out_size] = expr;
5115                         out_addrs[out_size] = addr;
5116                         ++out_size;
5117                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5118                         /* pure memory ops need no input (but we have to make sure we
5119                          * attach to the memory) */
5120                         assert(! (asm_flags &
5121                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5122                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5123                         needs_memory = true;
5124
5125                         /* we need to attach the address to the inputs */
5126                         expression_t *expr = argument->expression;
5127
5128                         ir_asm_constraint constraint;
5129                         constraint.pos              = pos;
5130                         constraint.constraint       = new_id_from_str(constraints);
5131                         constraint.mode             = mode_M;
5132                         tmp_in_constraints[in_size] = constraint;
5133
5134                         ins[in_size]          = expression_to_addr(expr);
5135                         ++in_size;
5136                         continue;
5137                 } else {
5138                         errorf(&statement->base.source_position,
5139                                "only modifiers but no place set in constraints '%s'",
5140                                constraints);
5141                         continue;
5142                 }
5143
5144                 ir_asm_constraint constraint;
5145                 constraint.pos        = pos;
5146                 constraint.constraint = new_id_from_str(constraints);
5147                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5148
5149                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5150         }
5151         assert(obstack_object_size(&asm_obst)
5152                         == out_size * sizeof(ir_asm_constraint));
5153         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5154
5155
5156         obstack_grow(&asm_obst, tmp_in_constraints,
5157                      in_size * sizeof(tmp_in_constraints[0]));
5158         /* find and count input and output arguments */
5159         argument = statement->inputs;
5160         for ( ; argument != NULL; argument = argument->next) {
5161                 const char *constraints = argument->constraints.begin;
5162                 asm_constraint_flags_t asm_flags
5163                         = be_parse_asm_constraints(constraints);
5164
5165                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5166                         errorf(&statement->base.source_position,
5167                                "some constraints in '%s' are not supported", constraints);
5168                         continue;
5169                 }
5170                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5171                         errorf(&statement->base.source_position,
5172                                "some constraints in '%s' are invalid", constraints);
5173                         continue;
5174                 }
5175                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5176                         errorf(&statement->base.source_position,
5177                                "write flag specified for input constraints '%s'",
5178                                constraints);
5179                         continue;
5180                 }
5181
5182                 ir_node *input;
5183                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5184                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5185                         /* we can treat this as "normal" input */
5186                         input = expression_to_firm(argument->expression);
5187                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5188                         /* pure memory ops need no input (but we have to make sure we
5189                          * attach to the memory) */
5190                         assert(! (asm_flags &
5191                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5192                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5193                         needs_memory = true;
5194                         input = expression_to_addr(argument->expression);
5195                 } else {
5196                         errorf(&statement->base.source_position,
5197                                "only modifiers but no place set in constraints '%s'",
5198                                constraints);
5199                         continue;
5200                 }
5201
5202                 ir_asm_constraint constraint;
5203                 constraint.pos        = next_pos++;
5204                 constraint.constraint = new_id_from_str(constraints);
5205                 constraint.mode       = get_irn_mode(input);
5206
5207                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5208                 ins[in_size++] = input;
5209         }
5210
5211         if (needs_memory) {
5212                 ir_asm_constraint constraint;
5213                 constraint.pos        = next_pos++;
5214                 constraint.constraint = new_id_from_str("");
5215                 constraint.mode       = mode_M;
5216
5217                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5218                 ins[in_size++] = get_store();
5219         }
5220
5221         assert(obstack_object_size(&asm_obst)
5222                         == in_size * sizeof(ir_asm_constraint));
5223         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5224
5225         /* create asm node */
5226         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5227
5228         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5229
5230         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5231                                   out_size, output_constraints,
5232                                   n_clobbers, clobbers, asm_text);
5233
5234         if (statement->is_volatile) {
5235                 set_irn_pinned(node, op_pin_state_pinned);
5236         } else {
5237                 set_irn_pinned(node, op_pin_state_floats);
5238         }
5239
5240         /* create output projs & connect them */
5241         if (needs_memory) {
5242                 ir_node *projm = new_Proj(node, mode_M, out_size);
5243                 set_store(projm);
5244         }
5245
5246         size_t i;
5247         for (i = 0; i < out_size; ++i) {
5248                 const expression_t *out_expr = out_exprs[i];
5249                 long                pn       = i;
5250                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5251                 ir_node            *proj     = new_Proj(node, mode, pn);
5252                 ir_node            *addr     = out_addrs[i];
5253
5254                 set_value_for_expression_addr(out_expr, proj, addr);
5255         }
5256
5257         return NULL;
5258 }
5259
5260 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5261 {
5262         statement_to_firm(statement->try_statement);
5263         source_position_t const *const pos = &statement->base.source_position;
5264         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5265         return NULL;
5266 }
5267
5268 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5269 {
5270         errorf(&statement->base.source_position, "__leave not supported yet");
5271         return NULL;
5272 }
5273
5274 /**
5275  * Transform a statement.
5276  */
5277 static ir_node *statement_to_firm(statement_t *const stmt)
5278 {
5279 #ifndef NDEBUG
5280         assert(!stmt->base.transformed);
5281         stmt->base.transformed = true;
5282 #endif
5283
5284         switch (stmt->kind) {
5285         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5286         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5287         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5288         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5289         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5290         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5291         case STATEMENT_EMPTY:         return NULL; /* nothing */
5292         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5293         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5294         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5295         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5296         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5297         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5298         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5299         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5300         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5301
5302         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5303         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5304         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5305
5306         case STATEMENT_ERROR: panic("error statement found");
5307         }
5308         panic("statement not implemented");
5309 }
5310
5311 static int count_local_variables(const entity_t *entity,
5312                                  const entity_t *const last)
5313 {
5314         int count = 0;
5315         entity_t const *const end = last != NULL ? last->base.next : NULL;
5316         for (; entity != end; entity = entity->base.next) {
5317                 type_t *type;
5318                 bool    address_taken;
5319
5320                 if (entity->kind == ENTITY_VARIABLE) {
5321                         type          = skip_typeref(entity->declaration.type);
5322                         address_taken = entity->variable.address_taken;
5323                 } else if (entity->kind == ENTITY_PARAMETER) {
5324                         type          = skip_typeref(entity->declaration.type);
5325                         address_taken = entity->parameter.address_taken;
5326                 } else {
5327                         continue;
5328                 }
5329
5330                 if (!address_taken && is_type_scalar(type))
5331                         ++count;
5332         }
5333         return count;
5334 }
5335
5336 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5337 {
5338         int *const count = env;
5339
5340         switch (stmt->kind) {
5341         case STATEMENT_DECLARATION: {
5342                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5343                 *count += count_local_variables(decl_stmt->declarations_begin,
5344                                 decl_stmt->declarations_end);
5345                 break;
5346         }
5347
5348         case STATEMENT_FOR:
5349                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5350                 break;
5351
5352         default:
5353                 break;
5354         }
5355 }
5356
5357 /**
5358  * Return the number of local (alias free) variables used by a function.
5359  */
5360 static int get_function_n_local_vars(entity_t *entity)
5361 {
5362         const function_t *function = &entity->function;
5363         int count = 0;
5364
5365         /* count parameters */
5366         count += count_local_variables(function->parameters.entities, NULL);
5367
5368         /* count local variables declared in body */
5369         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5370         return count;
5371 }
5372
5373 /**
5374  * Build Firm code for the parameters of a function.
5375  */
5376 static void initialize_function_parameters(entity_t *entity)
5377 {
5378         assert(entity->kind == ENTITY_FUNCTION);
5379         ir_graph *irg             = current_ir_graph;
5380         ir_node  *args            = get_irg_args(irg);
5381         int       n               = 0;
5382         ir_type  *function_irtype;
5383
5384         if (entity->function.need_closure) {
5385                 /* add an extra parameter for the static link */
5386                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5387                 ++n;
5388
5389                 /* Matze: IMO this is wrong, nested functions should have an own
5390                  * type and not rely on strange parameters... */
5391                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5392         } else {
5393                 function_irtype = get_ir_type(entity->declaration.type);
5394         }
5395
5396
5397
5398         entity_t *parameter = entity->function.parameters.entities;
5399         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5400                 if (parameter->kind != ENTITY_PARAMETER)
5401                         continue;
5402
5403                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5404                 type_t *type = skip_typeref(parameter->declaration.type);
5405
5406                 bool needs_entity = parameter->parameter.address_taken;
5407                 assert(!is_type_array(type));
5408                 if (is_type_compound(type)) {
5409                         needs_entity = true;
5410                 }
5411
5412                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5413                 if (needs_entity) {
5414                         ir_type   *frame_type = get_irg_frame_type(irg);
5415                         ir_entity *param
5416                                 = new_parameter_entity(frame_type, n, param_irtype);
5417                         parameter->declaration.kind
5418                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5419                         parameter->parameter.v.entity = param;
5420                         continue;
5421                 }
5422
5423                 ir_mode *param_mode = get_type_mode(param_irtype);
5424                 long     pn         = n;
5425                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5426
5427                 ir_mode *mode = get_ir_mode_storage(type);
5428                 value = create_conv(NULL, value, mode);
5429                 value = do_strict_conv(NULL, value);
5430
5431                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5432                 parameter->parameter.v.value_number = next_value_number_function;
5433                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5434                                         parameter);
5435                 ++next_value_number_function;
5436
5437                 set_value(parameter->parameter.v.value_number, value);
5438         }
5439 }
5440
5441 /**
5442  * Handle additional decl modifiers for IR-graphs
5443  *
5444  * @param irg            the IR-graph
5445  * @param dec_modifiers  additional modifiers
5446  */
5447 static void handle_decl_modifier_irg(ir_graph *irg,
5448                                      decl_modifiers_t decl_modifiers)
5449 {
5450         if (decl_modifiers & DM_NAKED) {
5451                 /* TRUE if the declaration includes the Microsoft
5452                    __declspec(naked) specifier. */
5453                 add_irg_additional_properties(irg, mtp_property_naked);
5454         }
5455         if (decl_modifiers & DM_FORCEINLINE) {
5456                 /* TRUE if the declaration includes the
5457                    Microsoft __forceinline specifier. */
5458                 set_irg_inline_property(irg, irg_inline_forced);
5459         }
5460         if (decl_modifiers & DM_NOINLINE) {
5461                 /* TRUE if the declaration includes the Microsoft
5462                    __declspec(noinline) specifier. */
5463                 set_irg_inline_property(irg, irg_inline_forbidden);
5464         }
5465 }
5466
5467 static void add_function_pointer(ir_type *segment, ir_entity *method,
5468                                  const char *unique_template)
5469 {
5470         ir_type   *method_type  = get_entity_type(method);
5471         ir_type   *ptr_type     = new_type_pointer(method_type);
5472
5473         /* these entities don't really have a name but firm only allows
5474          * "" in ld_ident.
5475          * Note that we mustn't give these entities a name since for example
5476          * Mach-O doesn't allow them. */
5477         ident     *ide          = id_unique(unique_template);
5478         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5479         ir_graph  *irg          = get_const_code_irg();
5480         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5481                                                            method);
5482
5483         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5484         set_entity_compiler_generated(ptr, 1);
5485         set_entity_visibility(ptr, ir_visibility_private);
5486         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5487         set_atomic_ent_value(ptr, val);
5488 }
5489
5490 /**
5491  * Generate possible IJmp branches to a given label block.
5492  */
5493 static void gen_ijmp_branches(ir_node *block)
5494 {
5495         ir_node *ijmp;
5496         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5497                 add_immBlock_pred(block, ijmp);
5498         }
5499 }
5500
5501 /**
5502  * Create code for a function and all inner functions.
5503  *
5504  * @param entity  the function entity
5505  */
5506 static void create_function(entity_t *entity)
5507 {
5508         assert(entity->kind == ENTITY_FUNCTION);
5509         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5510
5511         if (entity->function.statement == NULL)
5512                 return;
5513
5514         inner_functions     = NULL;
5515         current_trampolines = NULL;
5516
5517         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5518                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5519                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5520         }
5521         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5522                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5523                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5524         }
5525
5526         current_function_entity = entity;
5527         current_function_name   = NULL;
5528         current_funcsig         = NULL;
5529
5530         assert(all_labels == NULL);
5531         all_labels = NEW_ARR_F(label_t *, 0);
5532         ijmp_list  = NULL;
5533
5534         int       n_local_vars = get_function_n_local_vars(entity);
5535         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5536         current_ir_graph = irg;
5537
5538         ir_graph *old_current_function = current_function;
5539         current_function = irg;
5540
5541         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5542         current_vararg_entity = NULL;
5543
5544         set_irg_fp_model(irg, firm_fp_model);
5545         tarval_enable_fp_ops(1);
5546         set_irn_dbg_info(get_irg_start_block(irg),
5547                          get_entity_dbg_info(function_entity));
5548
5549         /* set inline flags */
5550         if (entity->function.is_inline)
5551                 set_irg_inline_property(irg, irg_inline_recomended);
5552         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5553
5554         next_value_number_function = 0;
5555         initialize_function_parameters(entity);
5556         current_static_link = entity->function.static_link;
5557
5558         statement_to_firm(entity->function.statement);
5559
5560         ir_node *end_block = get_irg_end_block(irg);
5561
5562         /* do we have a return statement yet? */
5563         if (currently_reachable()) {
5564                 type_t *type = skip_typeref(entity->declaration.type);
5565                 assert(is_type_function(type));
5566                 type_t *const return_type = skip_typeref(type->function.return_type);
5567
5568                 ir_node *ret;
5569                 if (is_type_void(return_type)) {
5570                         ret = new_Return(get_store(), 0, NULL);
5571                 } else {
5572                         ir_mode *const mode = get_ir_mode_storage(return_type);
5573
5574                         ir_node *in[1];
5575                         /* §5.1.2.2.3 main implicitly returns 0 */
5576                         if (is_main(entity)) {
5577                                 in[0] = new_Const(get_mode_null(mode));
5578                         } else {
5579                                 in[0] = new_Unknown(mode);
5580                         }
5581                         ret = new_Return(get_store(), 1, in);
5582                 }
5583                 add_immBlock_pred(end_block, ret);
5584         }
5585
5586         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5587                 label_t *label = all_labels[i];
5588                 if (label->address_taken) {
5589                         gen_ijmp_branches(label->block);
5590                 }
5591                 mature_immBlock(label->block);
5592         }
5593
5594         DEL_ARR_F(all_labels);
5595         all_labels = NULL;
5596
5597         irg_finalize_cons(irg);
5598
5599         /* finalize the frame type */
5600         ir_type *frame_type = get_irg_frame_type(irg);
5601         int      n          = get_compound_n_members(frame_type);
5602         int      align_all  = 4;
5603         int      offset     = 0;
5604         for (int i = 0; i < n; ++i) {
5605                 ir_entity *member      = get_compound_member(frame_type, i);
5606                 ir_type   *entity_type = get_entity_type(member);
5607
5608                 int align = get_type_alignment_bytes(entity_type);
5609                 if (align > align_all)
5610                         align_all = align;
5611                 int misalign = 0;
5612                 if (align > 0) {
5613                         misalign  = offset % align;
5614                         if (misalign > 0) {
5615                                 offset += align - misalign;
5616                         }
5617                 }
5618
5619                 set_entity_offset(member, offset);
5620                 offset += get_type_size_bytes(entity_type);
5621         }
5622         set_type_size_bytes(frame_type, offset);
5623         set_type_alignment_bytes(frame_type, align_all);
5624
5625         irg_verify(irg, VERIFY_ENFORCE_SSA);
5626         current_vararg_entity = old_current_vararg_entity;
5627         current_function      = old_current_function;
5628
5629         if (current_trampolines != NULL) {
5630                 DEL_ARR_F(current_trampolines);
5631                 current_trampolines = NULL;
5632         }
5633
5634         /* create inner functions if any */
5635         entity_t **inner = inner_functions;
5636         if (inner != NULL) {
5637                 ir_type *rem_outer_frame      = current_outer_frame;
5638                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5639                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5640                         create_function(inner[i]);
5641                 }
5642                 DEL_ARR_F(inner);
5643
5644                 current_outer_frame      = rem_outer_frame;
5645         }
5646 }
5647
5648 static void scope_to_firm(scope_t *scope)
5649 {
5650         /* first pass: create declarations */
5651         entity_t *entity = scope->entities;
5652         for ( ; entity != NULL; entity = entity->base.next) {
5653                 if (entity->base.symbol == NULL)
5654                         continue;
5655
5656                 if (entity->kind == ENTITY_FUNCTION) {
5657                         if (entity->function.btk != BUILTIN_NONE) {
5658                                 /* builtins have no representation */
5659                                 continue;
5660                         }
5661                         (void)get_function_entity(entity, NULL);
5662                 } else if (entity->kind == ENTITY_VARIABLE) {
5663                         create_global_variable(entity);
5664                 } else if (entity->kind == ENTITY_NAMESPACE) {
5665                         scope_to_firm(&entity->namespacee.members);
5666                 }
5667         }
5668
5669         /* second pass: create code/initializers */
5670         entity = scope->entities;
5671         for ( ; entity != NULL; entity = entity->base.next) {
5672                 if (entity->base.symbol == NULL)
5673                         continue;
5674
5675                 if (entity->kind == ENTITY_FUNCTION) {
5676                         if (entity->function.btk != BUILTIN_NONE) {
5677                                 /* builtins have no representation */
5678                                 continue;
5679                         }
5680                         create_function(entity);
5681                 } else if (entity->kind == ENTITY_VARIABLE) {
5682                         assert(entity->declaration.kind
5683                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5684                         current_ir_graph = get_const_code_irg();
5685                         create_variable_initializer(entity);
5686                 }
5687         }
5688 }
5689
5690 void init_ast2firm(void)
5691 {
5692         obstack_init(&asm_obst);
5693         init_atomic_modes();
5694
5695         ir_set_debug_retrieve(dbg_retrieve);
5696         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5697
5698         /* create idents for all known runtime functions */
5699         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5700                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5701         }
5702
5703         entitymap_init(&entitymap);
5704 }
5705
5706 static void init_ir_types(void)
5707 {
5708         static int ir_types_initialized = 0;
5709         if (ir_types_initialized)
5710                 return;
5711         ir_types_initialized = 1;
5712
5713         ir_type_char       = get_ir_type(type_char);
5714         ir_type_const_char = get_ir_type(type_const_char);
5715         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5716
5717         be_params             = be_get_backend_param();
5718         mode_float_arithmetic = be_params->mode_float_arithmetic;
5719
5720         stack_param_align     = be_params->stack_param_align;
5721 }
5722
5723 void exit_ast2firm(void)
5724 {
5725         entitymap_destroy(&entitymap);
5726         obstack_free(&asm_obst, NULL);
5727 }
5728
5729 static void global_asm_to_firm(statement_t *s)
5730 {
5731         for (; s != NULL; s = s->base.next) {
5732                 assert(s->kind == STATEMENT_ASM);
5733
5734                 char const *const text = s->asms.asm_text.begin;
5735                 size_t            size = s->asms.asm_text.size;
5736
5737                 /* skip the last \0 */
5738                 if (text[size - 1] == '\0')
5739                         --size;
5740
5741                 ident *const id = new_id_from_chars(text, size);
5742                 add_irp_asm(id);
5743         }
5744 }
5745
5746 static const char *get_cwd(void)
5747 {
5748         static char buf[1024];
5749         if (buf[0] == '\0')
5750                 getcwd(buf, sizeof(buf));
5751         return buf;
5752 }
5753
5754 void translation_unit_to_firm(translation_unit_t *unit)
5755 {
5756         if (c_mode & _CXX) {
5757                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5758         } else if (c_mode & _C99) {
5759                 be_dwarf_set_source_language(DW_LANG_C99);
5760         } else if (c_mode & _C89) {
5761                 be_dwarf_set_source_language(DW_LANG_C89);
5762         } else {
5763                 be_dwarf_set_source_language(DW_LANG_C);
5764         }
5765         be_dwarf_set_compilation_directory(get_cwd());
5766
5767         /* initialize firm arithmetic */
5768         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5769         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5770
5771         /* just to be sure */
5772         continue_label           = NULL;
5773         break_label              = NULL;
5774         current_switch           = NULL;
5775         current_translation_unit = unit;
5776
5777         init_ir_types();
5778
5779         scope_to_firm(&unit->scope);
5780         global_asm_to_firm(unit->global_asm);
5781
5782         current_ir_graph         = NULL;
5783         current_translation_unit = NULL;
5784 }