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