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