nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "symbol_t.h"
  39 #include "token_t.h"
  40 #include "type_t.h"
  41 #include "ast_t.h"
  42 #include "entity_t.h"
  43 #include "parser.h"
  44 #include "diagnostic.h"
  45 #include "lang_features.h"
  46 #include "types.h"
  47 #include "type_hash.h"
  48 #include "mangle.h"
  49 #include "walk.h"
  50 #include "warning.h"
  51 #include "printer.h"
  52 #include "entitymap_t.h"
  53 #include "driver/firm_opt.h"
  54
  55 typedef struct trampoline_region trampoline_region;
  56 struct trampoline_region {
  57         ir_entity        *function;    /**< The function that is called by this trampoline */
  58         ir_entity        *region;      /**< created region for the trampoline */
  59 };
  60
  61 fp_model_t firm_fp_model = fp_model_precise;
  62
  63 static const backend_params *be_params;
  64
  65 static ir_type *ir_type_char;
  66 static ir_type *ir_type_const_char;
  67 static ir_type *ir_type_wchar_t;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int        next_value_number_function;
  76 static ir_node   *continue_label;
  77 static ir_node   *break_label;
  78 static ir_node   *current_switch;
  79 static bool       saw_default_label;
  80 static label_t  **all_labels;
  81 static entity_t **inner_functions;
  82 static ir_node   *ijmp_list;
  83 static bool       constant_folding;
  84
  85 static const entity_t     *current_function_entity;
  86 static ir_node            *current_function_name;
  87 static ir_node            *current_funcsig;
  88 static ir_graph           *current_function;
  89 static translation_unit_t *current_translation_unit;
  90 static trampoline_region  *current_trampolines;
  91 static ir_type            *current_outer_frame;
  92 static ir_node            *current_static_link;
  93 static ir_entity          *current_vararg_entity;
  94
  95 static entitymap_t  entitymap;
  96
  97 static struct obstack asm_obst;
  98
  99 typedef enum declaration_kind_t {
 100         DECLARATION_KIND_UNKNOWN,
 101         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 102         DECLARATION_KIND_GLOBAL_VARIABLE,
 103         DECLARATION_KIND_LOCAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 105         DECLARATION_KIND_PARAMETER,
 106         DECLARATION_KIND_PARAMETER_ENTITY,
 107         DECLARATION_KIND_FUNCTION,
 108         DECLARATION_KIND_COMPOUND_MEMBER,
 109         DECLARATION_KIND_INNER_FUNCTION
 110 } declaration_kind_t;
 111
 112 static ir_type *get_ir_type_incomplete(type_t *type);
 113
 114 static void enqueue_inner_function(entity_t *entity)
 115 {
 116         if (inner_functions == NULL)
 117                 inner_functions = NEW_ARR_F(entity_t *, 0);
 118         ARR_APP1(entity_t*, inner_functions, entity);
 119 }
 120
 121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 122 {
 123         const entity_t *entity = get_irg_loc_description(irg, pos);
 124
 125         if (entity != NULL) {
 126                 source_position_t const *const pos = &entity->base.source_position;
 127                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 128         }
 129         return new_r_Unknown(irg, mode);
 130 }
 131
 132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 133 {
 134         source_position_t const *const pos = (source_position_t const*)dbg;
 135         if (pos) {
 136                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 137         } else {
 138                 return (src_loc_t){ NULL, 0, 0 };
 139         }
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 148                                     const type_dbg_info *dbg)
 149 {
 150         assert(dbg != NULL);
 151         print_to_buffer(buffer, buffer_size);
 152         const type_t *type = (const type_t*) dbg;
 153         print_type(type);
 154         finish_print_to_buffer();
 155 }
 156
 157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 158 {
 159         return (type_dbg_info*) type;
 160 }
 161
 162 /* is the current block a reachable one? */
 163 static bool currently_reachable(void)
 164 {
 165         ir_node *const block = get_cur_block();
 166         return block != NULL && !is_Bad(block);
 167 }
 168
 169 static void set_unreachable_now(void)
 170 {
 171         set_cur_block(NULL);
 172 }
 173
 174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 175
 176 static ir_node *_expression_to_firm(const expression_t *expression);
 177 static ir_node *expression_to_firm(const expression_t *expression);
 178
 179 static unsigned decide_modulo_shift(unsigned type_size)
 180 {
 181         if (architecture_modulo_shift == 0)
 182                 return 0;
 183         if (type_size < architecture_modulo_shift)
 184                 return architecture_modulo_shift;
 185         return type_size;
 186 }
 187
 188 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 189 {
 190         unsigned flags = get_atomic_type_flags(kind);
 191         unsigned size  = get_atomic_type_size(kind);
 192         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 193             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 194                 if (size == 4) {
 195                         return get_modeF();
 196                 } else if (size == 8) {
 197                         return get_modeD();
 198                 } else {
 199                         panic("unexpected kind");
 200                 }
 201         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 202                 char            name[64];
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 206
 207                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 208                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 209                                     modulo_shift);
 210         }
 211
 212         return NULL;
 213 }
 214
 215 /**
 216  * Initialises the atomic modes depending on the machine size.
 217  */
 218 static void init_atomic_modes(void)
 219 {
 220         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 221         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 222                 if (atomic_modes[i] != NULL)
 223                         continue;
 224                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 225         }
 226 }
 227
 228 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 229 {
 230         assert(kind <= ATOMIC_TYPE_LAST);
 231         return atomic_modes[kind];
 232 }
 233
 234 static ir_node *get_vla_size(array_type_t *const type)
 235 {
 236         ir_node *size_node = type->size_node;
 237         if (size_node == NULL) {
 238                 size_node = expression_to_firm(type->size_expression);
 239                 type->size_node = size_node;
 240         }
 241         return size_node;
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256 /**
 257  * Creates a Firm type for an atomic type
 258  */
 259 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 260 {
 261         ir_mode        *mode      = atomic_modes[akind];
 262         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 263         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 264         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 265
 266         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 267         set_type_alignment_bytes(irtype, alignment);
 268
 269         return irtype;
 270 }
 271
 272 /**
 273  * Creates a Firm type for a complex type
 274  */
 275 static ir_type *create_complex_type(const atomic_type_t *type)
 276 {
 277         atomic_type_kind_t  kind = type->akind;
 278         ir_mode            *mode = atomic_modes[kind];
 279         ident              *id   = get_mode_ident(mode);
 280
 281         (void) id;
 282
 283         /* FIXME: finish the array */
 284         return NULL;
 285 }
 286
 287 /**
 288  * Creates a Firm type for an imaginary type
 289  */
 290 static ir_type *create_imaginary_type(const atomic_type_t *type)
 291 {
 292         return create_atomic_type(type->akind, (const type_t*)type);
 293 }
 294
 295 /**
 296  * return type of a parameter (and take transparent union gnu extension into
 297  * account)
 298  */
 299 static type_t *get_parameter_type(type_t *orig_type)
 300 {
 301         type_t *type = skip_typeref(orig_type);
 302         if (is_type_union(type)
 303                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 304                 compound_t *compound = type->compound.compound;
 305                 type                 = compound->members.entities->declaration.type;
 306         }
 307
 308         return type;
 309 }
 310
 311 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 312 {
 313         type_t        *return_type  = skip_typeref(function_type->return_type);
 314
 315         int            n_parameters = count_parameters(function_type)
 316                                        + (for_closure ? 1 : 0);
 317         int            n_results    = is_type_void(return_type) ? 0 : 1;
 318         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 319         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 320
 321         if (!is_type_void(return_type)) {
 322                 ir_type *restype = get_ir_type(return_type);
 323                 set_method_res_type(irtype, 0, restype);
 324         }
 325
 326         function_parameter_t *parameter = function_type->parameters;
 327         int                   n         = 0;
 328         if (for_closure) {
 329                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 330                 set_method_param_type(irtype, n, p_irtype);
 331                 ++n;
 332         }
 333         for ( ; parameter != NULL; parameter = parameter->next) {
 334                 type_t  *type     = get_parameter_type(parameter->type);
 335                 ir_type *p_irtype = get_ir_type(type);
 336                 set_method_param_type(irtype, n, p_irtype);
 337                 ++n;
 338         }
 339
 340         bool is_variadic = function_type->variadic;
 341
 342         if (is_variadic)
 343                 set_method_variadicity(irtype, variadicity_variadic);
 344
 345         unsigned cc = get_method_calling_convention(irtype);
 346         switch (function_type->calling_convention) {
 347         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 348         case CC_CDECL:
 349 is_cdecl:
 350                 set_method_calling_convention(irtype, SET_CDECL(cc));
 351                 break;
 352
 353         case CC_STDCALL:
 354                 if (is_variadic)
 355                         goto is_cdecl;
 356
 357                 /* only non-variadic function can use stdcall, else use cdecl */
 358                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 359                 break;
 360
 361         case CC_FASTCALL:
 362                 if (is_variadic)
 363                         goto is_cdecl;
 364                 /* only non-variadic function can use fastcall, else use cdecl */
 365                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 366                 break;
 367
 368         case CC_THISCALL:
 369                 /* Hmm, leave default, not accepted by the parser yet. */
 370                 break;
 371         }
 372
 373         if (for_closure)
 374                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 375
 376         const decl_modifiers_t modifiers = function_type->modifiers;
 377         if (modifiers & DM_CONST)
 378                 add_method_additional_properties(irtype, mtp_property_const);
 379         if (modifiers & DM_PURE)
 380                 add_method_additional_properties(irtype, mtp_property_pure);
 381         if (modifiers & DM_RETURNS_TWICE)
 382                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 383         if (modifiers & DM_NORETURN)
 384                 add_method_additional_properties(irtype, mtp_property_noreturn);
 385         if (modifiers & DM_NOTHROW)
 386                 add_method_additional_properties(irtype, mtp_property_nothrow);
 387         if (modifiers & DM_MALLOC)
 388                 add_method_additional_properties(irtype, mtp_property_malloc);
 389
 390         return irtype;
 391 }
 392
 393 static ir_type *create_pointer_type(pointer_type_t *type)
 394 {
 395         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 396         type_t        *points_to    = type->points_to;
 397         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 398         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 399
 400         return irtype;
 401 }
 402
 403 static ir_type *create_reference_type(reference_type_t *type)
 404 {
 405         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 406         type_t        *refers_to    = type->refers_to;
 407         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 408         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 409
 410         return irtype;
 411 }
 412
 413 static ir_type *create_array_type(array_type_t *type)
 414 {
 415         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 416         type_t        *element_type    = type->element_type;
 417         ir_type       *ir_element_type = get_ir_type(element_type);
 418         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 419
 420         const int align = get_type_alignment_bytes(ir_element_type);
 421         set_type_alignment_bytes(irtype, align);
 422
 423         if (type->size_constant) {
 424                 int n_elements = type->size;
 425
 426                 set_array_bounds_int(irtype, 0, 0, n_elements);
 427
 428                 size_t elemsize = get_type_size_bytes(ir_element_type);
 429                 if (elemsize % align > 0) {
 430                         elemsize += align - (elemsize % align);
 431                 }
 432                 set_type_size_bytes(irtype, n_elements * elemsize);
 433         } else {
 434                 set_array_lower_bound_int(irtype, 0, 0);
 435         }
 436         set_type_state(irtype, layout_fixed);
 437
 438         return irtype;
 439 }
 440
 441 /**
 442  * Return the signed integer type of size bits.
 443  *
 444  * @param size   the size
 445  */
 446 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 447                                                  unsigned size,
 448                                                                                                  const type_t *type)
 449 {
 450         static ir_mode *s_modes[64 + 1] = {NULL, };
 451         ir_type *res;
 452         ir_mode *mode;
 453
 454         if (size <= 0 || size > 64)
 455                 return NULL;
 456
 457         mode = s_modes[size];
 458         if (mode == NULL) {
 459                 char name[32];
 460
 461                 snprintf(name, sizeof(name), "bf_I%u", size);
 462                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 463                 s_modes[size] = mode;
 464         }
 465
 466         type_dbg_info *dbgi = get_type_dbg_info_(type);
 467         res                 = new_d_type_primitive(mode, dbgi);
 468         set_primitive_base_type(res, base_tp);
 469
 470         return res;
 471 }
 472
 473 /**
 474  * Return the unsigned integer type of size bits.
 475  *
 476  * @param size   the size
 477  */
 478 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 479                                                    unsigned size,
 480                                                                                                    const type_t *type)
 481 {
 482         static ir_mode *u_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = u_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_U%u", size);
 494                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 495                 u_modes[size] = mode;
 496         }
 497
 498         type_dbg_info *dbgi = get_type_dbg_info_(type);
 499         res = new_d_type_primitive(mode, dbgi);
 500         set_primitive_base_type(res, base_tp);
 501
 502         return res;
 503 }
 504
 505 static ir_type *create_bitfield_type(const entity_t *entity)
 506 {
 507         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 508         type_t *base = skip_typeref(entity->declaration.type);
 509         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 510         ir_type *irbase = get_ir_type(base);
 511
 512         unsigned bit_size = entity->compound_member.bit_size;
 513
 514         assert(!is_type_float(base));
 515         if (is_type_signed(base)) {
 516                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 517         } else {
 518                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 519         }
 520 }
 521
 522 /**
 523  * Construct firm type from ast struct type.
 524  */
 525 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 526 {
 527         compound_t *compound = type->compound;
 528
 529         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 530                 return compound->irtype;
 531         }
 532
 533         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 534
 535         symbol_t *type_symbol = compound->base.symbol;
 536         ident    *id;
 537         if (type_symbol != NULL) {
 538                 id = new_id_from_str(type_symbol->string);
 539         } else {
 540                 if (is_union) {
 541                         id = id_unique("__anonymous_union.%u");
 542                 } else {
 543                         id = id_unique("__anonymous_struct.%u");
 544                 }
 545         }
 546
 547         ir_type *irtype;
 548         if (is_union) {
 549                 irtype = new_type_union(id);
 550         } else {
 551                 irtype = new_type_struct(id);
 552         }
 553
 554         compound->irtype_complete = false;
 555         compound->irtype          = irtype;
 556
 557         if (incomplete)
 558                 return irtype;
 559
 560         if (is_union) {
 561                 layout_union_type(type);
 562         } else {
 563                 layout_struct_type(type);
 564         }
 565
 566         compound->irtype_complete = true;
 567
 568         entity_t *entry = compound->members.entities;
 569         for ( ; entry != NULL; entry = entry->base.next) {
 570                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 571                         continue;
 572
 573                 symbol_t *symbol     = entry->base.symbol;
 574                 type_t   *entry_type = entry->declaration.type;
 575                 ident    *ident;
 576                 if (symbol == NULL) {
 577                         /* anonymous bitfield member, skip */
 578                         if (entry->compound_member.bitfield)
 579                                 continue;
 580                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 581                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 582                         ident = id_unique("anon.%u");
 583                 } else {
 584                         ident = new_id_from_str(symbol->string);
 585                 }
 586
 587                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 588
 589                 ir_type *entry_irtype;
 590                 if (entry->compound_member.bitfield) {
 591                         entry_irtype = create_bitfield_type(entry);
 592                 } else {
 593                         entry_irtype = get_ir_type(entry_type);
 594                 }
 595                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 596
 597                 set_entity_offset(entity, entry->compound_member.offset);
 598                 set_entity_offset_bits_remainder(entity,
 599                                                  entry->compound_member.bit_offset);
 600
 601                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 602                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 603                 entry->compound_member.entity = entity;
 604         }
 605
 606         set_type_alignment_bytes(irtype, compound->alignment);
 607         set_type_size_bytes(irtype, compound->size);
 608         set_type_state(irtype, layout_fixed);
 609
 610         return irtype;
 611 }
 612
 613 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 614
 615 static void determine_enum_values(enum_type_t *const type)
 616 {
 617         ir_mode   *const mode    = atomic_modes[type->base.akind];
 618         ir_tarval *const one     = get_mode_one(mode);
 619         ir_tarval *      tv_next = get_mode_null(mode);
 620
 621         enum_t   *enume = type->enume;
 622         entity_t *entry = enume->base.next;
 623         for (; entry != NULL; entry = entry->base.next) {
 624                 if (entry->kind != ENTITY_ENUM_VALUE)
 625                         break;
 626
 627                 expression_t *const init = entry->enum_value.value;
 628                 if (init != NULL) {
 629                         tv_next = fold_constant_to_tarval(init);
 630                 }
 631                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 632                 entry->enum_value.tv = tv_next;
 633                 tv_next = tarval_add(tv_next, one);
 634         }
 635 }
 636
 637 static ir_type *create_enum_type(enum_type_t *const type)
 638 {
 639         return create_atomic_type(type->base.akind, (const type_t*) type);
 640 }
 641
 642 static ir_type *get_ir_type_incomplete(type_t *type)
 643 {
 644         assert(type != NULL);
 645         type = skip_typeref(type);
 646
 647         if (type->base.firm_type != NULL) {
 648                 return type->base.firm_type;
 649         }
 650
 651         if (is_type_compound(type)) {
 652                 return create_compound_type(&type->compound, true);
 653         } else {
 654                 return get_ir_type(type);
 655         }
 656 }
 657
 658 ir_type *get_ir_type(type_t *type)
 659 {
 660         assert(type != NULL);
 661
 662         type = skip_typeref(type);
 663
 664         if (type->base.firm_type != NULL) {
 665                 return type->base.firm_type;
 666         }
 667
 668         ir_type *firm_type = NULL;
 669         switch (type->kind) {
 670         case TYPE_ATOMIC:
 671                 firm_type = create_atomic_type(type->atomic.akind, type);
 672                 break;
 673         case TYPE_COMPLEX:
 674                 firm_type = create_complex_type(&type->atomic);
 675                 break;
 676         case TYPE_IMAGINARY:
 677                 firm_type = create_imaginary_type(&type->atomic);
 678                 break;
 679         case TYPE_FUNCTION:
 680                 firm_type = create_method_type(&type->function, false);
 681                 break;
 682         case TYPE_POINTER:
 683                 firm_type = create_pointer_type(&type->pointer);
 684                 break;
 685         case TYPE_REFERENCE:
 686                 firm_type = create_reference_type(&type->reference);
 687                 break;
 688         case TYPE_ARRAY:
 689                 firm_type = create_array_type(&type->array);
 690                 break;
 691         case TYPE_COMPOUND_STRUCT:
 692         case TYPE_COMPOUND_UNION:
 693                 firm_type = create_compound_type(&type->compound, false);
 694                 break;
 695         case TYPE_ENUM:
 696                 firm_type = create_enum_type(&type->enumt);
 697                 break;
 698
 699         case TYPE_ERROR:
 700         case TYPE_TYPEOF:
 701         case TYPE_TYPEDEF:
 702                 break;
 703         }
 704         if (firm_type == NULL)
 705                 panic("unknown type found");
 706
 707         type->base.firm_type = firm_type;
 708         return firm_type;
 709 }
 710
 711 static ir_mode *get_ir_mode_storage(type_t *type)
 712 {
 713         type = skip_typeref(type);
 714
 715         /* Firm doesn't report a mode for arrays and structs/unions. */
 716         if (!is_type_scalar(type)) {
 717                 return mode_P_data;
 718         }
 719
 720         ir_type *const irtype = get_ir_type(type);
 721         ir_mode *const mode   = get_type_mode(irtype);
 722         assert(mode != NULL);
 723         return mode;
 724 }
 725
 726 /*
 727  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 728  * int that it returns bigger modes for floating point on some platforms
 729  * (x87 internally does arithemtic with 80bits)
 730  */
 731 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 732 {
 733         ir_mode *mode = get_ir_mode_storage(type);
 734         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 735                 return mode_float_arithmetic;
 736         }
 737
 738         return mode;
 739 }
 740
 741 /**
 742  * Return a node representing the size of a type.
 743  */
 744 static ir_node *get_type_size_node(type_t *type)
 745 {
 746         unsigned size;
 747         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 748         type = skip_typeref(type);
 749
 750         if (is_type_array(type) && type->array.is_vla) {
 751                 ir_node *size_node = get_vla_size(&type->array);
 752                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 753                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 754                 return real_size;
 755         }
 756
 757         size = get_type_size(type);
 758         return new_Const_long(mode, size);
 759 }
 760
 761 /** Names of the runtime functions. */
 762 static const struct {
 763         int        id;           /**< the rts id */
 764         int        n_res;        /**< number of return values */
 765         const char *name;        /**< the name of the rts function */
 766         int        n_params;     /**< number of parameters */
 767         unsigned   flags;        /**< language flags */
 768 } rts_data[] = {
 769         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 770         { rts_abort,      0, "abort",        0, _C89 },
 771         { rts_alloca,     1, "alloca",       1, _ALL },
 772         { rts_abs,        1, "abs",          1, _C89 },
 773         { rts_labs,       1, "labs",         1, _C89 },
 774         { rts_llabs,      1, "llabs",        1, _C99 },
 775         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 776
 777         { rts_fabs,       1, "fabs",         1, _C89 },
 778         { rts_sqrt,       1, "sqrt",         1, _C89 },
 779         { rts_cbrt,       1, "cbrt",         1, _C99 },
 780         { rts_exp,        1, "exp",          1, _C89 },
 781         { rts_exp2,       1, "exp2",         1, _C89 },
 782         { rts_exp10,      1, "exp10",        1, _GNUC },
 783         { rts_log,        1, "log",          1, _C89 },
 784         { rts_log2,       1, "log2",         1, _C89 },
 785         { rts_log10,      1, "log10",        1, _C89 },
 786         { rts_pow,        1, "pow",          2, _C89 },
 787         { rts_sin,        1, "sin",          1, _C89 },
 788         { rts_cos,        1, "cos",          1, _C89 },
 789         { rts_tan,        1, "tan",          1, _C89 },
 790         { rts_asin,       1, "asin",         1, _C89 },
 791         { rts_acos,       1, "acos",         1, _C89 },
 792         { rts_atan,       1, "atan",         1, _C89 },
 793         { rts_sinh,       1, "sinh",         1, _C89 },
 794         { rts_cosh,       1, "cosh",         1, _C89 },
 795         { rts_tanh,       1, "tanh",         1, _C89 },
 796
 797         { rts_fabsf,      1, "fabsf",        1, _C99 },
 798         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 799         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 800         { rts_expf,       1, "expf",         1, _C99 },
 801         { rts_exp2f,      1, "exp2f",        1, _C99 },
 802         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 803         { rts_logf,       1, "logf",         1, _C99 },
 804         { rts_log2f,      1, "log2f",        1, _C99 },
 805         { rts_log10f,     1, "log10f",       1, _C99 },
 806         { rts_powf,       1, "powf",         2, _C99 },
 807         { rts_sinf,       1, "sinf",         1, _C99 },
 808         { rts_cosf,       1, "cosf",         1, _C99 },
 809         { rts_tanf,       1, "tanf",         1, _C99 },
 810         { rts_asinf,      1, "asinf",        1, _C99 },
 811         { rts_acosf,      1, "acosf",        1, _C99 },
 812         { rts_atanf,      1, "atanf",        1, _C99 },
 813         { rts_sinhf,      1, "sinhf",        1, _C99 },
 814         { rts_coshf,      1, "coshf",        1, _C99 },
 815         { rts_tanhf,      1, "tanhf",        1, _C99 },
 816
 817         { rts_fabsl,      1, "fabsl",        1, _C99 },
 818         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 819         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 820         { rts_expl,       1, "expl",         1, _C99 },
 821         { rts_exp2l,      1, "exp2l",        1, _C99 },
 822         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 823         { rts_logl,       1, "logl",         1, _C99 },
 824         { rts_log2l,      1, "log2l",        1, _C99 },
 825         { rts_log10l,     1, "log10l",       1, _C99 },
 826         { rts_powl,       1, "powl",         2, _C99 },
 827         { rts_sinl,       1, "sinl",         1, _C99 },
 828         { rts_cosl,       1, "cosl",         1, _C99 },
 829         { rts_tanl,       1, "tanl",         1, _C99 },
 830         { rts_asinl,      1, "asinl",        1, _C99 },
 831         { rts_acosl,      1, "acosl",        1, _C99 },
 832         { rts_atanl,      1, "atanl",        1, _C99 },
 833         { rts_sinhl,      1, "sinhl",        1, _C99 },
 834         { rts_coshl,      1, "coshl",        1, _C99 },
 835         { rts_tanhl,      1, "tanhl",        1, _C99 },
 836
 837         { rts_strcmp,     1, "strcmp",       2, _C89 },
 838         { rts_strncmp,    1, "strncmp",      3, _C89 },
 839         { rts_strcpy,     1, "strcpy",       2, _C89 },
 840         { rts_strlen,     1, "strlen",       1, _C89 },
 841         { rts_memcpy,     1, "memcpy",       3, _C89 },
 842         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 843         { rts_memmove,    1, "memmove",      3, _C89 },
 844         { rts_memset,     1, "memset",       3, _C89 },
 845         { rts_memcmp,     1, "memcmp",       3, _C89 },
 846 };
 847
 848 static ident *rts_idents[lengthof(rts_data)];
 849
 850 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 851
 852 void set_create_ld_ident(ident *(*func)(entity_t*))
 853 {
 854         create_ld_ident = func;
 855 }
 856
 857 static bool declaration_is_definition(const entity_t *entity)
 858 {
 859         switch (entity->kind) {
 860         case ENTITY_VARIABLE:
 861                 return entity->variable.initializer != NULL;
 862         case ENTITY_FUNCTION:
 863                 return entity->function.statement != NULL;
 864         case ENTITY_PARAMETER:
 865         case ENTITY_COMPOUND_MEMBER:
 866                 return false;
 867         case ENTITY_TYPEDEF:
 868         case ENTITY_ENUM:
 869         case ENTITY_ENUM_VALUE:
 870         case ENTITY_NAMESPACE:
 871         case ENTITY_LABEL:
 872         case ENTITY_LOCAL_LABEL:
 873                 break;
 874         }
 875         panic("declaration_is_definition called on non-declaration");
 876 }
 877
 878 /**
 879  * Handle GNU attributes for entities
 880  *
 881  * @param ent   the entity
 882  * @param decl  the routine declaration
 883  */
 884 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 885 {
 886         assert(is_declaration(entity));
 887         decl_modifiers_t modifiers = entity->declaration.modifiers;
 888
 889         if (is_method_entity(irentity)) {
 890                 if (modifiers & DM_PURE) {
 891                         set_entity_additional_properties(irentity, mtp_property_pure);
 892                 }
 893                 if (modifiers & DM_CONST) {
 894                         add_entity_additional_properties(irentity, mtp_property_const);
 895                 }
 896         }
 897         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 898                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 899         }
 900         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 901             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 902                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 903         }
 904 }
 905
 906 static bool is_main(entity_t *entity)
 907 {
 908         static symbol_t *sym_main = NULL;
 909         if (sym_main == NULL) {
 910                 sym_main = symbol_table_insert("main");
 911         }
 912
 913         if (entity->base.symbol != sym_main)
 914                 return false;
 915         /* must be in outermost scope */
 916         if (entity->base.parent_scope != &current_translation_unit->scope)
 917                 return false;
 918
 919         return true;
 920 }
 921
 922 /**
 923  * Creates an entity representing a function.
 924  *
 925  * @param entity       the function declaration/definition
 926  * @param owner_type   the owner type of this function, NULL
 927  *                     for global functions
 928  */
 929 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 930 {
 931         assert(entity->kind == ENTITY_FUNCTION);
 932         if (entity->function.irentity != NULL)
 933                 return entity->function.irentity;
 934
 935         switch (entity->function.btk) {
 936         case BUILTIN_NONE:
 937         case BUILTIN_LIBC:
 938         case BUILTIN_LIBC_CHECK:
 939                 break;
 940         default:
 941                 return NULL;
 942         }
 943
 944         symbol_t *symbol = entity->base.symbol;
 945         ident    *id     = new_id_from_str(symbol->string);
 946
 947         /* already an entity defined? */
 948         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 949         bool const has_body = entity->function.statement != NULL;
 950         if (irentity != NULL) {
 951                 goto entity_created;
 952         }
 953
 954         ir_type *ir_type_method;
 955         if (entity->function.need_closure)
 956                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 957         else
 958                 ir_type_method = get_ir_type(entity->declaration.type);
 959
 960         bool nested_function = false;
 961         if (owner_type == NULL)
 962                 owner_type = get_glob_type();
 963         else
 964                 nested_function = true;
 965
 966         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 967         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 968
 969         ident *ld_id;
 970         if (nested_function)
 971                 ld_id = id_unique("inner.%u");
 972         else
 973                 ld_id = create_ld_ident(entity);
 974         set_entity_ld_ident(irentity, ld_id);
 975
 976         handle_decl_modifiers(irentity, entity);
 977
 978         if (! nested_function) {
 979                 storage_class_tag_t const storage_class
 980                         = (storage_class_tag_t) entity->declaration.storage_class;
 981                 if (storage_class == STORAGE_CLASS_STATIC) {
 982                     set_entity_visibility(irentity, ir_visibility_local);
 983                 } else {
 984                     set_entity_visibility(irentity, ir_visibility_external);
 985                 }
 986
 987                 bool const is_inline = entity->function.is_inline;
 988                 if (is_inline && has_body) {
 989                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
 990                             || ((c_mode & _C99) == 0
 991                                 && storage_class == STORAGE_CLASS_EXTERN)) {
 992                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
 993                         }
 994                 }
 995         } else {
 996                 /* nested functions are always local */
 997                 set_entity_visibility(irentity, ir_visibility_local);
 998         }
 999
1000         /* We should check for file scope here, but as long as we compile C only
1001            this is not needed. */
1002         if (!freestanding && !has_body) {
1003                 /* check for a known runtime function */
1004                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1005                         if (id != rts_idents[i])
1006                                 continue;
1007
1008                         function_type_t *function_type
1009                                 = &entity->declaration.type->function;
1010                         /* rts_entities code can't handle a "wrong" number of parameters */
1011                         if (function_type->unspecified_parameters)
1012                                 continue;
1013
1014                         /* check number of parameters */
1015                         int n_params = count_parameters(function_type);
1016                         if (n_params != rts_data[i].n_params)
1017                                 continue;
1018
1019                         type_t *return_type = skip_typeref(function_type->return_type);
1020                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1021                         if (n_res != rts_data[i].n_res)
1022                                 continue;
1023
1024                         /* ignore those rts functions not necessary needed for current mode */
1025                         if ((c_mode & rts_data[i].flags) == 0)
1026                                 continue;
1027                         assert(rts_entities[rts_data[i].id] == NULL);
1028                         rts_entities[rts_data[i].id] = irentity;
1029                 }
1030         }
1031
1032         entitymap_insert(&entitymap, symbol, irentity);
1033
1034 entity_created:
1035         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1036         entity->function.irentity = irentity;
1037
1038         return irentity;
1039 }
1040
1041 /**
1042  * Creates a SymConst for a given entity.
1043  *
1044  * @param dbgi    debug info
1045  * @param entity  the entity
1046  */
1047 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1048 {
1049         assert(entity != NULL);
1050         union symconst_symbol sym;
1051         sym.entity_p = entity;
1052         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1053 }
1054
1055 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1056 {
1057         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1058 }
1059
1060 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1061                                    ir_mode *dest_mode)
1062 {
1063         if (is_Const(value)) {
1064                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1065         }
1066
1067         ir_node *cond       = new_d_Cond(dbgi, value);
1068         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1069         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1070         ir_node *tblock     = new_Block(1, &proj_true);
1071         ir_node *fblock     = new_Block(1, &proj_false);
1072         set_cur_block(tblock);
1073         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1074         ir_node *tjump  = new_Jmp();
1075         set_cur_block(fblock);
1076         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1077         ir_node *fjump  = new_Jmp();
1078
1079         ir_node *in[2]      = { tjump, fjump };
1080         ir_node *mergeblock = new_Block(2, in);
1081         set_cur_block(mergeblock);
1082         ir_node *phi_in[2]  = { const1, const0 };
1083         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1084         return phi;
1085 }
1086
1087 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1088 {
1089         ir_mode *value_mode = get_irn_mode(value);
1090
1091         if (value_mode == dest_mode)
1092                 return value;
1093
1094         if (dest_mode == mode_b) {
1095                 ir_node *zero = new_Const(get_mode_null(value_mode));
1096                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1097                 return cmp;
1098         } else if (value_mode == mode_b) {
1099                 return create_conv_from_b(dbgi, value, dest_mode);
1100         }
1101
1102         return new_d_Conv(dbgi, value, dest_mode);
1103 }
1104
1105 /**
1106  * Creates a SymConst node representing a wide string literal.
1107  *
1108  * @param literal   the wide string literal
1109  */
1110 static ir_node *wide_string_literal_to_firm(
1111                 const string_literal_expression_t *literal)
1112 {
1113         ir_type  *const global_type = get_glob_type();
1114         ir_type  *const elem_type   = ir_type_wchar_t;
1115         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1116         ir_type  *const type        = new_type_array(1, elem_type);
1117
1118         ident     *const id     = id_unique("str.%u");
1119         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1120         set_entity_ld_ident(entity, id);
1121         set_entity_visibility(entity, ir_visibility_private);
1122         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1123
1124         ir_mode      *const mode = get_type_mode(elem_type);
1125         const size_t        slen = wstrlen(&literal->value);
1126
1127         set_array_lower_bound_int(type, 0, 0);
1128         set_array_upper_bound_int(type, 0, slen);
1129         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1130         set_type_state(type, layout_fixed);
1131
1132         ir_initializer_t *initializer = create_initializer_compound(slen);
1133         const char              *p    = literal->value.begin;
1134         for (size_t i = 0; i < slen; ++i) {
1135                 assert(p < literal->value.begin + literal->value.size);
1136                 utf32             v   = read_utf8_char(&p);
1137                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1138                 ir_initializer_t *val = create_initializer_tarval(tv);
1139                 set_initializer_compound_value(initializer, i, val);
1140         }
1141         set_entity_initializer(entity, initializer);
1142
1143         return create_symconst(dbgi, entity);
1144 }
1145
1146 /**
1147  * Creates a SymConst node representing a string constant.
1148  *
1149  * @param src_pos    the source position of the string constant
1150  * @param id_prefix  a prefix for the name of the generated string constant
1151  * @param value      the value of the string constant
1152  */
1153 static ir_node *string_to_firm(const source_position_t *const src_pos,
1154                                const char *const id_prefix,
1155                                const string_t *const value)
1156 {
1157         ir_type  *const global_type = get_glob_type();
1158         dbg_info *const dbgi        = get_dbg_info(src_pos);
1159         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1160
1161         ident     *const id     = id_unique(id_prefix);
1162         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1163         set_entity_ld_ident(entity, id);
1164         set_entity_visibility(entity, ir_visibility_private);
1165         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1166
1167         ir_type *const elem_type = ir_type_const_char;
1168         ir_mode *const mode      = get_type_mode(elem_type);
1169
1170         const char* const string = value->begin;
1171         const size_t      slen   = value->size;
1172
1173         set_array_lower_bound_int(type, 0, 0);
1174         set_array_upper_bound_int(type, 0, slen);
1175         set_type_size_bytes(type, slen);
1176         set_type_state(type, layout_fixed);
1177
1178         ir_initializer_t *initializer = create_initializer_compound(slen);
1179         for (size_t i = 0; i < slen; ++i) {
1180                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1181                 ir_initializer_t *val = create_initializer_tarval(tv);
1182                 set_initializer_compound_value(initializer, i, val);
1183         }
1184         set_entity_initializer(entity, initializer);
1185
1186         return create_symconst(dbgi, entity);
1187 }
1188
1189 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1190 {
1191         const char *string = literal->value.begin;
1192         size_t      size   = literal->value.size;
1193
1194         assert(type->kind == TYPE_ATOMIC);
1195         atomic_type_kind_t akind = type->atomic.akind;
1196
1197         ir_mode   *const mode = atomic_modes[akind];
1198         ir_tarval *const tv   = new_tarval_from_str(string, size, mode);
1199         if (tv == tarval_bad)
1200                 return false;
1201
1202         literal->base.type    = type;
1203         literal->target_value = tv;
1204         return true;
1205 }
1206
1207 static void create_integer_tarval(literal_expression_t *literal)
1208 {
1209         /* -1: signed only, 0: any, 1: unsigned only */
1210         int             sign   = literal->value.begin[0] != '0' /* decimal */ ? -1 : 0;
1211         unsigned        ls     = 0;
1212         const string_t *suffix = &literal->suffix;
1213         /* parse suffix */
1214         if (suffix->size > 0) {
1215                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1216                         if (*c == 'u' || *c == 'U') sign = 1;
1217                         if (*c == 'l' || *c == 'L') { ++ls; }
1218                 }
1219         }
1220
1221         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1222
1223         /* now try if the constant is small enough for some types */
1224         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1225         if (ls < 1) {
1226                 if (sign <= 0 && try_create_integer(literal, type_int))
1227                         goto finished;
1228                 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1229                         goto finished;
1230         }
1231         if (ls < 2) {
1232                 if (sign <= 0 && try_create_integer(literal, type_long))
1233                         goto finished;
1234                 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1235                         goto finished;
1236         }
1237         /* last try? then we should not report tarval_bad */
1238         if (sign < 0)
1239                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1240         if (sign <= 0 && try_create_integer(literal, type_long_long))
1241                 goto finished;
1242
1243         /* last try */
1244         assert(sign >= 0);
1245         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246         bool res = try_create_integer(literal, type_unsigned_long_long);
1247         if (!res)
1248                 panic("internal error when parsing number literal");
1249
1250 finished:
1251         tarval_set_integer_overflow_mode(old_mode);
1252 }
1253
1254 void determine_literal_type(literal_expression_t *literal)
1255 {
1256         switch (literal->base.kind) {
1257         case EXPR_LITERAL_INTEGER:
1258                 create_integer_tarval(literal);
1259                 return;
1260         default:
1261                 break;
1262         }
1263 }
1264
1265 /**
1266  * Creates a Const node representing a constant.
1267  */
1268 static ir_node *literal_to_firm(const literal_expression_t *literal)
1269 {
1270         type_t     *type   = skip_typeref(literal->base.type);
1271         ir_mode    *mode   = get_ir_mode_storage(type);
1272         const char *string = literal->value.begin;
1273         size_t      size   = literal->value.size;
1274         ir_tarval  *tv;
1275
1276         switch (literal->base.kind) {
1277         case EXPR_LITERAL_WIDE_CHARACTER: {
1278                 utf32  v = read_utf8_char(&string);
1279                 char   buf[128];
1280                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1281
1282                 tv = new_tarval_from_str(buf, len, mode);
1283                 break;
1284         }
1285
1286         case EXPR_LITERAL_CHARACTER: {
1287                 long long int v;
1288                 bool char_is_signed
1289                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1290                 if (size == 1 && char_is_signed) {
1291                         v = (signed char)string[0];
1292                 } else {
1293                         v = 0;
1294                         for (size_t i = 0; i < size; ++i) {
1295                                 v = (v << 8) | ((unsigned char)string[i]);
1296                         }
1297                 }
1298                 char   buf[128];
1299                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1300
1301                 tv = new_tarval_from_str(buf, len, mode);
1302                 break;
1303         }
1304
1305         case EXPR_LITERAL_INTEGER:
1306                 assert(literal->target_value != NULL);
1307                 tv = literal->target_value;
1308                 break;
1309
1310         case EXPR_LITERAL_FLOATINGPOINT:
1311                 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                         symbol_t          const *const sym = ref->entity->base.symbol;
1536                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1537
1538                         /* simply create a NULL pointer */
1539                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1540                         ir_node  *res  = new_Const(get_mode_null(mode));
1541
1542                         return res;
1543                 }
1544         }
1545
1546         switch ((declaration_kind_t) entity->declaration.kind) {
1547         case DECLARATION_KIND_UNKNOWN:
1548                 break;
1549
1550         case DECLARATION_KIND_LOCAL_VARIABLE: {
1551                 ir_mode *const mode  = get_ir_mode_storage(type);
1552                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1553                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1554         }
1555         case DECLARATION_KIND_PARAMETER: {
1556                 ir_mode *const mode  = get_ir_mode_storage(type);
1557                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1558                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1559         }
1560         case DECLARATION_KIND_FUNCTION: {
1561                 return create_symconst(dbgi, entity->function.irentity);
1562         }
1563         case DECLARATION_KIND_INNER_FUNCTION: {
1564                 ir_mode *const mode = get_ir_mode_storage(type);
1565                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1566                         /* inner function not using the closure */
1567                         return create_symconst(dbgi, entity->function.irentity);
1568                 } else {
1569                         /* need trampoline here */
1570                         return create_trampoline(dbgi, mode, entity->function.irentity);
1571                 }
1572         }
1573         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1574                 const variable_t *variable = &entity->variable;
1575                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1576                 return deref_address(dbgi, variable->base.type, addr);
1577         }
1578
1579         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1580                 ir_entity *irentity = entity->variable.v.entity;
1581                 ir_node   *frame    = get_local_frame(irentity);
1582                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1583                 return deref_address(dbgi, entity->declaration.type, sel);
1584         }
1585         case DECLARATION_KIND_PARAMETER_ENTITY: {
1586                 ir_entity *irentity = entity->parameter.v.entity;
1587                 ir_node   *frame    = get_local_frame(irentity);
1588                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1589                 return deref_address(dbgi, entity->declaration.type, sel);
1590         }
1591
1592         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1593                 return entity->variable.v.vla_base;
1594
1595         case DECLARATION_KIND_COMPOUND_MEMBER:
1596                 panic("not implemented reference type");
1597         }
1598
1599         panic("reference to declaration with unknown type found");
1600 }
1601
1602 static ir_node *reference_addr(const reference_expression_t *ref)
1603 {
1604         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1605         entity_t *entity = ref->entity;
1606         assert(is_declaration(entity));
1607
1608         switch((declaration_kind_t) entity->declaration.kind) {
1609         case DECLARATION_KIND_UNKNOWN:
1610                 break;
1611         case DECLARATION_KIND_PARAMETER:
1612         case DECLARATION_KIND_LOCAL_VARIABLE:
1613                 /* you can store to a local variable (so we don't panic but return NULL
1614                  * as an indicator for no real address) */
1615                 return NULL;
1616         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1617                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1618                 return addr;
1619         }
1620         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1621                 ir_entity *irentity = entity->variable.v.entity;
1622                 ir_node   *frame    = get_local_frame(irentity);
1623                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1624
1625                 return sel;
1626         }
1627         case DECLARATION_KIND_PARAMETER_ENTITY: {
1628                 ir_entity *irentity = entity->parameter.v.entity;
1629                 ir_node   *frame    = get_local_frame(irentity);
1630                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1631
1632                 return sel;
1633         }
1634
1635         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1636                 return entity->variable.v.vla_base;
1637
1638         case DECLARATION_KIND_FUNCTION: {
1639                 return create_symconst(dbgi, entity->function.irentity);
1640         }
1641
1642         case DECLARATION_KIND_INNER_FUNCTION: {
1643                 type_t  *const type = skip_typeref(entity->declaration.type);
1644                 ir_mode *const mode = get_ir_mode_storage(type);
1645                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1646                         /* inner function not using the closure */
1647                         return create_symconst(dbgi, entity->function.irentity);
1648                 } else {
1649                         /* need trampoline here */
1650                         return create_trampoline(dbgi, mode, entity->function.irentity);
1651                 }
1652         }
1653
1654         case DECLARATION_KIND_COMPOUND_MEMBER:
1655                 panic("not implemented reference type");
1656         }
1657
1658         panic("reference to declaration with unknown type found");
1659 }
1660
1661 /**
1662  * Transform calls to builtin functions.
1663  */
1664 static ir_node *process_builtin_call(const call_expression_t *call)
1665 {
1666         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1667
1668         assert(call->function->kind == EXPR_REFERENCE);
1669         reference_expression_t *builtin = &call->function->reference;
1670
1671         type_t *expr_type = skip_typeref(builtin->base.type);
1672         assert(is_type_pointer(expr_type));
1673
1674         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1675
1676         switch (builtin->entity->function.btk) {
1677         case BUILTIN_NONE:
1678                 break;
1679         case BUILTIN_ALLOCA: {
1680                 expression_t *argument = call->arguments->expression;
1681                 ir_node      *size     = expression_to_firm(argument);
1682
1683                 ir_node *store  = get_store();
1684                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1685                                               stack_alloc);
1686                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1687                 set_store(proj_m);
1688                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1689
1690                 return res;
1691         }
1692         case BUILTIN_INF: {
1693                 type_t    *type = function_type->function.return_type;
1694                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1695                 ir_tarval *tv   = get_mode_infinite(mode);
1696                 ir_node   *res  = new_d_Const(dbgi, tv);
1697                 return res;
1698         }
1699         case BUILTIN_NAN: {
1700                 /* Ignore string for now... */
1701                 assert(is_type_function(function_type));
1702                 type_t    *type = function_type->function.return_type;
1703                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1704                 ir_tarval *tv   = get_mode_NAN(mode);
1705                 ir_node   *res  = new_d_Const(dbgi, tv);
1706                 return res;
1707         }
1708         case BUILTIN_EXPECT: {
1709                 expression_t *argument = call->arguments->expression;
1710                 return _expression_to_firm(argument);
1711         }
1712         case BUILTIN_VA_END:
1713                 /* evaluate the argument of va_end for its side effects */
1714                 _expression_to_firm(call->arguments->expression);
1715                 return NULL;
1716         case BUILTIN_OBJECT_SIZE: {
1717                 /* determine value of "type" */
1718                 expression_t *type_expression = call->arguments->next->expression;
1719                 long          type_val        = fold_constant_to_int(type_expression);
1720                 type_t       *type            = function_type->function.return_type;
1721                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1722                 /* just produce a "I don't know" result */
1723                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1724                                                 get_mode_minus_one(mode);
1725
1726                 return new_d_Const(dbgi, result);
1727         }
1728         case BUILTIN_ROTL: {
1729                 ir_node *val  = expression_to_firm(call->arguments->expression);
1730                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1731                 ir_mode *mode = get_irn_mode(val);
1732                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1733                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1734         }
1735         case BUILTIN_ROTR: {
1736                 ir_node *val  = expression_to_firm(call->arguments->expression);
1737                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1738                 ir_mode *mode = get_irn_mode(val);
1739                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1740                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1741                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1742                 return new_d_Rotl(dbgi, val, sub, mode);
1743         }
1744         case BUILTIN_FIRM:
1745                 break;
1746         case BUILTIN_LIBC:
1747         case BUILTIN_LIBC_CHECK:
1748                 panic("builtin did not produce an entity");
1749         }
1750         panic("invalid builtin found");
1751 }
1752
1753 /**
1754  * Transform a call expression.
1755  * Handles some special cases, like alloca() calls, which must be resolved
1756  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1757  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1758  * handled right...
1759  */
1760 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1761 {
1762         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1763         assert(currently_reachable());
1764
1765         expression_t   *function = call->function;
1766         ir_node        *callee   = NULL;
1767         bool            firm_builtin = false;
1768         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1769         if (function->kind == EXPR_REFERENCE) {
1770                 const reference_expression_t *ref    = &function->reference;
1771                 entity_t                     *entity = ref->entity;
1772
1773                 if (entity->kind == ENTITY_FUNCTION) {
1774                         builtin_kind_t builtin = entity->function.btk;
1775                         if (builtin == BUILTIN_FIRM) {
1776                                 firm_builtin = true;
1777                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1778                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1779                                    && builtin != BUILTIN_LIBC_CHECK) {
1780                                 return process_builtin_call(call);
1781                         }
1782                 }
1783         }
1784         if (!firm_builtin)
1785                 callee = expression_to_firm(function);
1786
1787         type_t *type = skip_typeref(function->base.type);
1788         assert(is_type_pointer(type));
1789         pointer_type_t *pointer_type = &type->pointer;
1790         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1791         assert(is_type_function(points_to));
1792         function_type_t *function_type = &points_to->function;
1793
1794         int      n_parameters    = 0;
1795         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1796         ir_type *new_method_type = NULL;
1797         if (function_type->variadic || function_type->unspecified_parameters) {
1798                 const call_argument_t *argument = call->arguments;
1799                 for ( ; argument != NULL; argument = argument->next) {
1800                         ++n_parameters;
1801                 }
1802
1803                 /* we need to construct a new method type matching the call
1804                  * arguments... */
1805                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1806                 int n_res       = get_method_n_ress(ir_method_type);
1807                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1808                 set_method_calling_convention(new_method_type,
1809                                get_method_calling_convention(ir_method_type));
1810                 set_method_additional_properties(new_method_type,
1811                                get_method_additional_properties(ir_method_type));
1812                 set_method_variadicity(new_method_type,
1813                                        get_method_variadicity(ir_method_type));
1814
1815                 for (int i = 0; i < n_res; ++i) {
1816                         set_method_res_type(new_method_type, i,
1817                                             get_method_res_type(ir_method_type, i));
1818                 }
1819                 argument = call->arguments;
1820                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1821                         expression_t *expression = argument->expression;
1822                         ir_type      *irtype     = get_ir_type(expression->base.type);
1823                         set_method_param_type(new_method_type, i, irtype);
1824                 }
1825                 ir_method_type = new_method_type;
1826         } else {
1827                 n_parameters = get_method_n_params(ir_method_type);
1828         }
1829
1830         ir_node *in[n_parameters];
1831
1832         const call_argument_t *argument = call->arguments;
1833         for (int n = 0; n < n_parameters; ++n) {
1834                 expression_t *expression = argument->expression;
1835                 ir_node      *arg_node   = expression_to_firm(expression);
1836
1837                 type_t *arg_type = skip_typeref(expression->base.type);
1838                 if (!is_type_compound(arg_type)) {
1839                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1840                         arg_node = create_conv(dbgi, arg_node, mode);
1841                         arg_node = do_strict_conv(dbgi, arg_node);
1842                 }
1843
1844                 in[n] = arg_node;
1845
1846                 argument = argument->next;
1847         }
1848
1849         ir_node *store;
1850         if (function_type->modifiers & DM_CONST) {
1851                 store = get_irg_no_mem(current_ir_graph);
1852         } else {
1853                 store = get_store();
1854         }
1855
1856         ir_node *node;
1857         type_t  *return_type = skip_typeref(function_type->return_type);
1858         ir_node *result      = NULL;
1859         if (firm_builtin) {
1860                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1861                                      ir_method_type);
1862                 if (! (function_type->modifiers & DM_CONST)) {
1863                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1864                         set_store(mem);
1865                 }
1866
1867                 if (!is_type_void(return_type)) {
1868                         assert(is_type_scalar(return_type));
1869                         ir_mode *mode = get_ir_mode_storage(return_type);
1870                         result = new_Proj(node, mode, pn_Builtin_max+1);
1871                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1872                         result              = create_conv(NULL, result, mode_arith);
1873                 }
1874         } else {
1875                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1876                 if (! (function_type->modifiers & DM_CONST)) {
1877                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1878                         set_store(mem);
1879                 }
1880
1881                 if (!is_type_void(return_type)) {
1882                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1883                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1884                         result                    = new_Proj(resproj, mode, 0);
1885                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1886                         result                    = create_conv(NULL, result, mode_arith);
1887                 }
1888         }
1889
1890         if (function_type->modifiers & DM_NORETURN) {
1891                 /* A dead end:  Keep the Call and the Block.  Also place all further
1892                  * nodes into a new and unreachable block. */
1893                 keep_alive(node);
1894                 keep_alive(get_cur_block());
1895                 ir_node *block = new_Block(0, NULL);
1896                 set_cur_block(block);
1897         }
1898
1899         return result;
1900 }
1901
1902 static ir_node *statement_to_firm(statement_t *statement);
1903 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1904
1905 static ir_node *expression_to_addr(const expression_t *expression);
1906 static ir_node *create_condition_evaluation(const expression_t *expression,
1907                                             ir_node *true_block,
1908                                             ir_node *false_block);
1909
1910 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1911                          ir_node *value)
1912 {
1913         if (!is_type_compound(type)) {
1914                 ir_mode *mode = get_ir_mode_storage(type);
1915                 value         = create_conv(dbgi, value, mode);
1916                 value         = do_strict_conv(dbgi, value);
1917         }
1918
1919         ir_node *memory = get_store();
1920
1921         if (is_type_scalar(type)) {
1922                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1923                                       ? cons_volatile : cons_none;
1924                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1925                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1926                 set_store(store_mem);
1927         } else {
1928                 ir_type *irtype    = get_ir_type(type);
1929                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1930                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1931                 set_store(copyb_mem);
1932         }
1933 }
1934
1935 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1936 {
1937         ir_tarval *all_one   = get_mode_all_one(mode);
1938         int        mode_size = get_mode_size_bits(mode);
1939         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1940
1941         assert(offset >= 0);
1942         assert(size   >= 0);
1943         assert(offset + size <= mode_size);
1944         if (size == mode_size) {
1945                 return all_one;
1946         }
1947
1948         long       shiftr    = get_mode_size_bits(mode) - size;
1949         long       shiftl    = offset;
1950         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1951         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1952         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1953         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1954
1955         return mask1;
1956 }
1957
1958 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1959                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1960                 bool need_return)
1961 {
1962         ir_type *entity_type = get_entity_type(entity);
1963         ir_type *base_type   = get_primitive_base_type(entity_type);
1964         ir_mode *mode        = get_type_mode(base_type);
1965         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1966
1967         value = create_conv(dbgi, value, mode);
1968
1969         /* kill upper bits of value and shift to right position */
1970         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1971         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1972         unsigned  base_bits  = get_mode_size_bits(mode);
1973         unsigned  shiftwidth = base_bits - bitsize;
1974
1975         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1976         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1977
1978         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1979         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1980         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1981
1982         /* load current value */
1983         ir_node   *mem             = get_store();
1984         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1985                                           set_volatile ? cons_volatile : cons_none);
1986         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1987         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1988         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1989         ir_tarval *inv_mask        = tarval_not(shift_mask);
1990         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1991         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1992
1993         /* construct new value and store */
1994         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1995         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1996                                          set_volatile ? cons_volatile : cons_none);
1997         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1998         set_store(store_mem);
1999
2000         if (!need_return)
2001                 return NULL;
2002
2003         ir_node *res_shr;
2004         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2005         if (mode_is_signed(mode)) {
2006                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2007         } else {
2008                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2009         }
2010         return res_shr;
2011 }
2012
2013 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2014                                          ir_node *addr)
2015 {
2016         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2017         entity_t *entity    = expression->compound_entry;
2018         type_t   *base_type = entity->declaration.type;
2019         ir_mode  *mode      = get_ir_mode_storage(base_type);
2020         ir_node  *mem       = get_store();
2021         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2022         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2023         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2024         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2025
2026         ir_mode  *amode     = mode;
2027         /* optimisation, since shifting in modes < machine_size is usually
2028          * less efficient */
2029         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2030                 amode = mode_uint;
2031         }
2032         unsigned amode_size = get_mode_size_bits(amode);
2033         load_res = create_conv(dbgi, load_res, amode);
2034
2035         set_store(load_mem);
2036
2037         /* kill upper bits */
2038         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2039         unsigned   bitoffset   = entity->compound_member.bit_offset;
2040         unsigned   bitsize     = entity->compound_member.bit_size;
2041         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2042         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2043         ir_node   *countl      = new_d_Const(dbgi, tvl);
2044         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2045
2046         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2047         assert(shift_bitsr <= amode_size);
2048         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2049         ir_node   *countr      = new_d_Const(dbgi, tvr);
2050         ir_node   *shiftr;
2051         if (mode_is_signed(mode)) {
2052                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2053         } else {
2054                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2055         }
2056
2057         type_t  *type    = expression->base.type;
2058         ir_mode *resmode = get_ir_mode_arithmetic(type);
2059         return create_conv(dbgi, shiftr, resmode);
2060 }
2061
2062 /* make sure the selected compound type is constructed */
2063 static void construct_select_compound(const select_expression_t *expression)
2064 {
2065         type_t *type = skip_typeref(expression->compound->base.type);
2066         if (is_type_pointer(type)) {
2067                 type = type->pointer.points_to;
2068         }
2069         (void) get_ir_type(type);
2070 }
2071
2072 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2073                                               ir_node *value, ir_node *addr)
2074 {
2075         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2076         type_t   *type = skip_typeref(expression->base.type);
2077
2078         if (!is_type_compound(type)) {
2079                 ir_mode  *mode = get_ir_mode_storage(type);
2080                 value          = create_conv(dbgi, value, mode);
2081                 value          = do_strict_conv(dbgi, value);
2082         }
2083
2084         if (expression->kind == EXPR_REFERENCE) {
2085                 const reference_expression_t *ref = &expression->reference;
2086
2087                 entity_t *entity = ref->entity;
2088                 assert(is_declaration(entity));
2089                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2090                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2091                         set_value(entity->variable.v.value_number, value);
2092                         return value;
2093                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2094                         set_value(entity->parameter.v.value_number, value);
2095                         return value;
2096                 }
2097         }
2098
2099         if (addr == NULL)
2100                 addr = expression_to_addr(expression);
2101         assert(addr != NULL);
2102
2103         if (expression->kind == EXPR_SELECT) {
2104                 const select_expression_t *select = &expression->select;
2105
2106                 construct_select_compound(select);
2107
2108                 entity_t *entity = select->compound_entry;
2109                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2110                 if (entity->compound_member.bitfield) {
2111                         ir_entity *irentity = entity->compound_member.entity;
2112                         bool       set_volatile
2113                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2114                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2115                                                        set_volatile, true);
2116                         return value;
2117                 }
2118         }
2119
2120         assign_value(dbgi, addr, type, value);
2121         return value;
2122 }
2123
2124 static void set_value_for_expression(const expression_t *expression,
2125                                      ir_node *value)
2126 {
2127         set_value_for_expression_addr(expression, value, NULL);
2128 }
2129
2130 static ir_node *get_value_from_lvalue(const expression_t *expression,
2131                                       ir_node *addr)
2132 {
2133         if (expression->kind == EXPR_REFERENCE) {
2134                 const reference_expression_t *ref = &expression->reference;
2135
2136                 entity_t *entity = ref->entity;
2137                 assert(entity->kind == ENTITY_VARIABLE
2138                                 || entity->kind == ENTITY_PARAMETER);
2139                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2140                 int value_number;
2141                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2142                         value_number = entity->variable.v.value_number;
2143                         assert(addr == NULL);
2144                         type_t  *type = skip_typeref(expression->base.type);
2145                         ir_mode *mode = get_ir_mode_storage(type);
2146                         ir_node *res  = get_value(value_number, mode);
2147                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2148                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2149                         value_number = entity->parameter.v.value_number;
2150                         assert(addr == NULL);
2151                         type_t  *type = skip_typeref(expression->base.type);
2152                         ir_mode *mode = get_ir_mode_storage(type);
2153                         ir_node *res  = get_value(value_number, mode);
2154                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2155                 }
2156         }
2157
2158         assert(addr != NULL);
2159         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2160
2161         ir_node *value;
2162         if (expression->kind == EXPR_SELECT &&
2163             expression->select.compound_entry->compound_member.bitfield) {
2164             construct_select_compound(&expression->select);
2165                 value = bitfield_extract_to_firm(&expression->select, addr);
2166         } else {
2167                 value = deref_address(dbgi, expression->base.type, addr);
2168         }
2169
2170         return value;
2171 }
2172
2173
2174 static ir_node *create_incdec(const unary_expression_t *expression)
2175 {
2176         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2177         const expression_t *value_expr = expression->value;
2178         ir_node            *addr       = expression_to_addr(value_expr);
2179         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2180
2181         type_t  *type = skip_typeref(expression->base.type);
2182         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2183
2184         ir_node *offset;
2185         if (is_type_pointer(type)) {
2186                 pointer_type_t *pointer_type = &type->pointer;
2187                 offset = get_type_size_node(pointer_type->points_to);
2188         } else {
2189                 assert(is_type_arithmetic(type));
2190                 offset = new_Const(get_mode_one(mode));
2191         }
2192
2193         ir_node *result;
2194         ir_node *store_value;
2195         switch(expression->base.kind) {
2196         case EXPR_UNARY_POSTFIX_INCREMENT:
2197                 result      = value;
2198                 store_value = new_d_Add(dbgi, value, offset, mode);
2199                 break;
2200         case EXPR_UNARY_POSTFIX_DECREMENT:
2201                 result      = value;
2202                 store_value = new_d_Sub(dbgi, value, offset, mode);
2203                 break;
2204         case EXPR_UNARY_PREFIX_INCREMENT:
2205                 result      = new_d_Add(dbgi, value, offset, mode);
2206                 store_value = result;
2207                 break;
2208         case EXPR_UNARY_PREFIX_DECREMENT:
2209                 result      = new_d_Sub(dbgi, value, offset, mode);
2210                 store_value = result;
2211                 break;
2212         default:
2213                 panic("no incdec expr in create_incdec");
2214         }
2215
2216         set_value_for_expression_addr(value_expr, store_value, addr);
2217
2218         return result;
2219 }
2220
2221 static bool is_local_variable(expression_t *expression)
2222 {
2223         if (expression->kind != EXPR_REFERENCE)
2224                 return false;
2225         reference_expression_t *ref_expr = &expression->reference;
2226         entity_t               *entity   = ref_expr->entity;
2227         if (entity->kind != ENTITY_VARIABLE)
2228                 return false;
2229         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2230         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2231 }
2232
2233 static ir_relation get_relation(const expression_kind_t kind)
2234 {
2235         switch(kind) {
2236         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2237         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2238         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2239         case EXPR_BINARY_ISLESS:
2240         case EXPR_BINARY_LESS:          return ir_relation_less;
2241         case EXPR_BINARY_ISLESSEQUAL:
2242         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2243         case EXPR_BINARY_ISGREATER:
2244         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2245         case EXPR_BINARY_ISGREATEREQUAL:
2246         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2247         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2248
2249         default:
2250                 break;
2251         }
2252         panic("trying to get pn_Cmp from non-comparison binexpr type");
2253 }
2254
2255 /**
2256  * Handle the assume optimizer hint: check if a Confirm
2257  * node can be created.
2258  *
2259  * @param dbi    debug info
2260  * @param expr   the IL assume expression
2261  *
2262  * we support here only some simple cases:
2263  *  - var rel const
2264  *  - const rel val
2265  *  - var rel var
2266  */
2267 static ir_node *handle_assume_compare(dbg_info *dbi,
2268                                       const binary_expression_t *expression)
2269 {
2270         expression_t *op1 = expression->left;
2271         expression_t *op2 = expression->right;
2272         entity_t     *var2, *var = NULL;
2273         ir_node      *res      = NULL;
2274         ir_relation   relation = get_relation(expression->base.kind);
2275
2276         if (is_local_variable(op1) && is_local_variable(op2)) {
2277                 var  = op1->reference.entity;
2278             var2 = op2->reference.entity;
2279
2280                 type_t  *const type = skip_typeref(var->declaration.type);
2281                 ir_mode *const mode = get_ir_mode_storage(type);
2282
2283                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2284                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2285
2286                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2287                 set_value(var2->variable.v.value_number, res);
2288
2289                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2290                 set_value(var->variable.v.value_number, res);
2291
2292                 return res;
2293         }
2294
2295         expression_t *con = NULL;
2296         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2297                 var = op1->reference.entity;
2298                 con = op2;
2299         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2300                 relation = get_inversed_relation(relation);
2301                 var = op2->reference.entity;
2302                 con = op1;
2303         }
2304
2305         if (var != NULL) {
2306                 type_t  *const type = skip_typeref(var->declaration.type);
2307                 ir_mode *const mode = get_ir_mode_storage(type);
2308
2309                 res = get_value(var->variable.v.value_number, mode);
2310                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2311                 set_value(var->variable.v.value_number, res);
2312         }
2313         return res;
2314 }
2315
2316 /**
2317  * Handle the assume optimizer hint.
2318  *
2319  * @param dbi    debug info
2320  * @param expr   the IL assume expression
2321  */
2322 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2323 {
2324         switch(expression->kind) {
2325         case EXPR_BINARY_EQUAL:
2326         case EXPR_BINARY_NOTEQUAL:
2327         case EXPR_BINARY_LESS:
2328         case EXPR_BINARY_LESSEQUAL:
2329         case EXPR_BINARY_GREATER:
2330         case EXPR_BINARY_GREATEREQUAL:
2331                 return handle_assume_compare(dbi, &expression->binary);
2332         default:
2333                 return NULL;
2334         }
2335 }
2336
2337 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2338                             type_t *from_type, type_t *type)
2339 {
2340         type = skip_typeref(type);
2341         if (is_type_void(type)) {
2342                 /* make sure firm type is constructed */
2343                 (void) get_ir_type(type);
2344                 return NULL;
2345         }
2346         if (!is_type_scalar(type)) {
2347                 /* make sure firm type is constructed */
2348                 (void) get_ir_type(type);
2349                 return value_node;
2350         }
2351
2352         from_type     = skip_typeref(from_type);
2353         ir_mode *mode = get_ir_mode_storage(type);
2354         /* check for conversion from / to __based types */
2355         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2356                 const variable_t *from_var = from_type->pointer.base_variable;
2357                 const variable_t *to_var   = type->pointer.base_variable;
2358                 if (from_var != to_var) {
2359                         if (from_var != NULL) {
2360                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2361                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2362                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2363                         }
2364                         if (to_var != NULL) {
2365                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2366                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2367                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2368                         }
2369                 }
2370         }
2371
2372         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2373                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2374                  * convert to mode_b so we only get a 0/1 value */
2375                 value_node = create_conv(dbgi, value_node, mode_b);
2376         }
2377
2378         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2379         ir_node *node       = create_conv(dbgi, value_node, mode);
2380         node                = do_strict_conv(dbgi, node);
2381         node                = create_conv(dbgi, node, mode_arith);
2382
2383         return node;
2384 }
2385
2386 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2387 {
2388         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2389         type_t   *type = skip_typeref(expression->base.type);
2390
2391         const expression_t *value = expression->value;
2392
2393         switch(expression->base.kind) {
2394         case EXPR_UNARY_TAKE_ADDRESS:
2395                 return expression_to_addr(value);
2396
2397         case EXPR_UNARY_NEGATE: {
2398                 ir_node *value_node = expression_to_firm(value);
2399                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2400                 return new_d_Minus(dbgi, value_node, mode);
2401         }
2402         case EXPR_UNARY_PLUS:
2403                 return expression_to_firm(value);
2404         case EXPR_UNARY_BITWISE_NEGATE: {
2405                 ir_node *value_node = expression_to_firm(value);
2406                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2407                 return new_d_Not(dbgi, value_node, mode);
2408         }
2409         case EXPR_UNARY_NOT: {
2410                 ir_node *value_node = _expression_to_firm(value);
2411                 value_node          = create_conv(dbgi, value_node, mode_b);
2412                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2413                 return res;
2414         }
2415         case EXPR_UNARY_DEREFERENCE: {
2416                 ir_node *value_node = expression_to_firm(value);
2417                 type_t  *value_type = skip_typeref(value->base.type);
2418                 assert(is_type_pointer(value_type));
2419
2420                 /* check for __based */
2421                 const variable_t *const base_var = value_type->pointer.base_variable;
2422                 if (base_var != NULL) {
2423                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2424                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2425                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2426                 }
2427                 type_t  *points_to  = value_type->pointer.points_to;
2428                 return deref_address(dbgi, points_to, value_node);
2429         }
2430         case EXPR_UNARY_POSTFIX_INCREMENT:
2431         case EXPR_UNARY_POSTFIX_DECREMENT:
2432         case EXPR_UNARY_PREFIX_INCREMENT:
2433         case EXPR_UNARY_PREFIX_DECREMENT:
2434                 return create_incdec(expression);
2435         case EXPR_UNARY_CAST: {
2436                 ir_node *value_node = expression_to_firm(value);
2437                 type_t  *from_type  = value->base.type;
2438                 return create_cast(dbgi, value_node, from_type, type);
2439         }
2440         case EXPR_UNARY_ASSUME:
2441                 return handle_assume(dbgi, value);
2442
2443         default:
2444                 break;
2445         }
2446         panic("invalid UNEXPR type found");
2447 }
2448
2449 /**
2450  * produces a 0/1 depending of the value of a mode_b node
2451  */
2452 static ir_node *produce_condition_result(const expression_t *expression,
2453                                          ir_mode *mode, dbg_info *dbgi)
2454 {
2455         ir_node *const one_block  = new_immBlock();
2456         ir_node *const zero_block = new_immBlock();
2457         create_condition_evaluation(expression, one_block, zero_block);
2458         mature_immBlock(one_block);
2459         mature_immBlock(zero_block);
2460
2461         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2462         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2463         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2464         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2465         set_cur_block(block);
2466
2467         ir_node *const one   = new_Const(get_mode_one(mode));
2468         ir_node *const zero  = new_Const(get_mode_null(mode));
2469         ir_node *const in[2] = { one, zero };
2470         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2471
2472         return val;
2473 }
2474
2475 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2476                 ir_node *value, type_t *type)
2477 {
2478         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2479         assert(is_type_pointer(type));
2480         pointer_type_t *const pointer_type = &type->pointer;
2481         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2482         ir_node        *      elem_size    = get_type_size_node(points_to);
2483         elem_size                          = create_conv(dbgi, elem_size, mode);
2484         value                              = create_conv(dbgi, value,     mode);
2485         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2486         return mul;
2487 }
2488
2489 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2490                           ir_node *left, ir_node *right)
2491 {
2492         ir_mode  *mode;
2493         type_t   *type_left  = skip_typeref(expression->left->base.type);
2494         type_t   *type_right = skip_typeref(expression->right->base.type);
2495
2496         expression_kind_t kind = expression->base.kind;
2497
2498         switch (kind) {
2499         case EXPR_BINARY_SHIFTLEFT:
2500         case EXPR_BINARY_SHIFTRIGHT:
2501         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2502         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2503                 mode  = get_ir_mode_arithmetic(expression->base.type);
2504                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2505                 break;
2506
2507         case EXPR_BINARY_SUB:
2508                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2509                         const pointer_type_t *const ptr_type = &type_left->pointer;
2510
2511                         mode = get_ir_mode_arithmetic(expression->base.type);
2512                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2513                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2514                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2515                         ir_node *const no_mem    = new_NoMem();
2516                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2517                                                                                                    mode, op_pin_state_floats);
2518                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2519                 }
2520                 /* fallthrough */
2521         case EXPR_BINARY_SUB_ASSIGN:
2522                 if (is_type_pointer(type_left)) {
2523                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2524                         mode  = get_ir_mode_arithmetic(type_left);
2525                         break;
2526                 }
2527                 goto normal_node;
2528
2529         case EXPR_BINARY_ADD:
2530         case EXPR_BINARY_ADD_ASSIGN:
2531                 if (is_type_pointer(type_left)) {
2532                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2533                         mode  = get_ir_mode_arithmetic(type_left);
2534                         break;
2535                 } else if (is_type_pointer(type_right)) {
2536                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2537                         mode  = get_ir_mode_arithmetic(type_right);
2538                         break;
2539                 }
2540                 goto normal_node;
2541
2542         default:
2543 normal_node:
2544                 mode = get_ir_mode_arithmetic(type_right);
2545                 left = create_conv(dbgi, left, mode);
2546                 break;
2547         }
2548
2549         switch (kind) {
2550         case EXPR_BINARY_ADD_ASSIGN:
2551         case EXPR_BINARY_ADD:
2552                 return new_d_Add(dbgi, left, right, mode);
2553         case EXPR_BINARY_SUB_ASSIGN:
2554         case EXPR_BINARY_SUB:
2555                 return new_d_Sub(dbgi, left, right, mode);
2556         case EXPR_BINARY_MUL_ASSIGN:
2557         case EXPR_BINARY_MUL:
2558                 return new_d_Mul(dbgi, left, right, mode);
2559         case EXPR_BINARY_BITWISE_AND:
2560         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2561                 return new_d_And(dbgi, left, right, mode);
2562         case EXPR_BINARY_BITWISE_OR:
2563         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2564                 return new_d_Or(dbgi, left, right, mode);
2565         case EXPR_BINARY_BITWISE_XOR:
2566         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2567                 return new_d_Eor(dbgi, left, right, mode);
2568         case EXPR_BINARY_SHIFTLEFT:
2569         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2570                 return new_d_Shl(dbgi, left, right, mode);
2571         case EXPR_BINARY_SHIFTRIGHT:
2572         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2573                 if (mode_is_signed(mode)) {
2574                         return new_d_Shrs(dbgi, left, right, mode);
2575                 } else {
2576                         return new_d_Shr(dbgi, left, right, mode);
2577                 }
2578         case EXPR_BINARY_DIV:
2579         case EXPR_BINARY_DIV_ASSIGN: {
2580                 ir_node *pin = new_Pin(new_NoMem());
2581                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2582                                          op_pin_state_floats);
2583                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2584                 return res;
2585         }
2586         case EXPR_BINARY_MOD:
2587         case EXPR_BINARY_MOD_ASSIGN: {
2588                 ir_node *pin = new_Pin(new_NoMem());
2589                 assert(!mode_is_float(mode));
2590                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2591                                          op_pin_state_floats);
2592                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2593                 return res;
2594         }
2595         default:
2596                 panic("unexpected expression kind");
2597         }
2598 }
2599
2600 static ir_node *create_lazy_op(const binary_expression_t *expression)
2601 {
2602         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2603         type_t   *type = skip_typeref(expression->base.type);
2604         ir_mode  *mode = get_ir_mode_arithmetic(type);
2605
2606         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2607                 bool val = fold_constant_to_bool(expression->left);
2608                 expression_kind_t ekind = expression->base.kind;
2609                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2610                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2611                         if (!val) {
2612                                 return new_Const(get_mode_null(mode));
2613                         }
2614                 } else {
2615                         if (val) {
2616                                 return new_Const(get_mode_one(mode));
2617                         }
2618                 }
2619
2620                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2621                         bool valr = fold_constant_to_bool(expression->right);
2622                         return create_Const_from_bool(mode, valr);
2623                 }
2624
2625                 return produce_condition_result(expression->right, mode, dbgi);
2626         }
2627
2628         return produce_condition_result((const expression_t*) expression, mode,
2629                                         dbgi);
2630 }
2631
2632 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2633                                             ir_node *right, ir_mode *mode);
2634
2635 static ir_node *create_assign_binop(const binary_expression_t *expression)
2636 {
2637         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2638         const expression_t *left_expr = expression->left;
2639         type_t             *type      = skip_typeref(left_expr->base.type);
2640         ir_node            *right     = expression_to_firm(expression->right);
2641         ir_node            *left_addr = expression_to_addr(left_expr);
2642         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2643         ir_node            *result    = create_op(dbgi, expression, left, right);
2644
2645         result = create_cast(dbgi, result, expression->right->base.type, type);
2646         result = do_strict_conv(dbgi, result);
2647
2648         result = set_value_for_expression_addr(left_expr, result, left_addr);
2649
2650         if (!is_type_compound(type)) {
2651                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2652                 result = create_conv(dbgi, result, mode_arithmetic);
2653         }
2654         return result;
2655 }
2656
2657 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2658 {
2659         expression_kind_t kind = expression->base.kind;
2660
2661         switch(kind) {
2662         case EXPR_BINARY_EQUAL:
2663         case EXPR_BINARY_NOTEQUAL:
2664         case EXPR_BINARY_LESS:
2665         case EXPR_BINARY_LESSEQUAL:
2666         case EXPR_BINARY_GREATER:
2667         case EXPR_BINARY_GREATEREQUAL:
2668         case EXPR_BINARY_ISGREATER:
2669         case EXPR_BINARY_ISGREATEREQUAL:
2670         case EXPR_BINARY_ISLESS:
2671         case EXPR_BINARY_ISLESSEQUAL:
2672         case EXPR_BINARY_ISLESSGREATER:
2673         case EXPR_BINARY_ISUNORDERED: {
2674                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2675                 ir_node    *left     = expression_to_firm(expression->left);
2676                 ir_node    *right    = expression_to_firm(expression->right);
2677                 ir_relation relation = get_relation(kind);
2678                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2679                 return cmp;
2680         }
2681         case EXPR_BINARY_ASSIGN: {
2682                 ir_node *addr  = expression_to_addr(expression->left);
2683                 ir_node *right = expression_to_firm(expression->right);
2684                 ir_node *res
2685                         = set_value_for_expression_addr(expression->left, right, addr);
2686
2687                 type_t  *type            = skip_typeref(expression->base.type);
2688                 if (!is_type_compound(type)) {
2689                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2690                         res                      = create_conv(NULL, res, mode_arithmetic);
2691                 }
2692                 return res;
2693         }
2694         case EXPR_BINARY_ADD:
2695         case EXPR_BINARY_SUB:
2696         case EXPR_BINARY_MUL:
2697         case EXPR_BINARY_DIV:
2698         case EXPR_BINARY_MOD:
2699         case EXPR_BINARY_BITWISE_AND:
2700         case EXPR_BINARY_BITWISE_OR:
2701         case EXPR_BINARY_BITWISE_XOR:
2702         case EXPR_BINARY_SHIFTLEFT:
2703         case EXPR_BINARY_SHIFTRIGHT:
2704         {
2705                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2706                 ir_node  *left  = expression_to_firm(expression->left);
2707                 ir_node  *right = expression_to_firm(expression->right);
2708                 return create_op(dbgi, expression, left, right);
2709         }
2710         case EXPR_BINARY_LOGICAL_AND:
2711         case EXPR_BINARY_LOGICAL_OR:
2712                 return create_lazy_op(expression);
2713         case EXPR_BINARY_COMMA:
2714                 /* create side effects of left side */
2715                 (void) expression_to_firm(expression->left);
2716                 return _expression_to_firm(expression->right);
2717
2718         case EXPR_BINARY_ADD_ASSIGN:
2719         case EXPR_BINARY_SUB_ASSIGN:
2720         case EXPR_BINARY_MUL_ASSIGN:
2721         case EXPR_BINARY_MOD_ASSIGN:
2722         case EXPR_BINARY_DIV_ASSIGN:
2723         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2724         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2725         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2726         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2727         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2728                 return create_assign_binop(expression);
2729         default:
2730                 panic("TODO binexpr type");
2731         }
2732 }
2733
2734 static ir_node *array_access_addr(const array_access_expression_t *expression)
2735 {
2736         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2737         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2738         ir_node  *offset      = expression_to_firm(expression->index);
2739         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2740         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2741         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2742
2743         return result;
2744 }
2745
2746 static ir_node *array_access_to_firm(
2747                 const array_access_expression_t *expression)
2748 {
2749         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2750         ir_node  *addr   = array_access_addr(expression);
2751         type_t   *type   = revert_automatic_type_conversion(
2752                         (const expression_t*) expression);
2753         type             = skip_typeref(type);
2754
2755         return deref_address(dbgi, type, addr);
2756 }
2757
2758 static long get_offsetof_offset(const offsetof_expression_t *expression)
2759 {
2760         type_t *orig_type = expression->type;
2761         long    offset    = 0;
2762
2763         designator_t *designator = expression->designator;
2764         for ( ; designator != NULL; designator = designator->next) {
2765                 type_t *type = skip_typeref(orig_type);
2766                 /* be sure the type is constructed */
2767                 (void) get_ir_type(type);
2768
2769                 if (designator->symbol != NULL) {
2770                         assert(is_type_compound(type));
2771                         symbol_t *symbol = designator->symbol;
2772
2773                         compound_t *compound = type->compound.compound;
2774                         entity_t   *iter     = compound->members.entities;
2775                         for ( ; iter != NULL; iter = iter->base.next) {
2776                                 if (iter->base.symbol == symbol) {
2777                                         break;
2778                                 }
2779                         }
2780                         assert(iter != NULL);
2781
2782                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2783                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2784                         offset += get_entity_offset(iter->compound_member.entity);
2785
2786                         orig_type = iter->declaration.type;
2787                 } else {
2788                         expression_t *array_index = designator->array_index;
2789                         assert(designator->array_index != NULL);
2790                         assert(is_type_array(type));
2791
2792                         long index         = fold_constant_to_int(array_index);
2793                         ir_type *arr_type  = get_ir_type(type);
2794                         ir_type *elem_type = get_array_element_type(arr_type);
2795                         long     elem_size = get_type_size_bytes(elem_type);
2796
2797                         offset += index * elem_size;
2798
2799                         orig_type = type->array.element_type;
2800                 }
2801         }
2802
2803         return offset;
2804 }
2805
2806 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2807 {
2808         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2809         long       offset = get_offsetof_offset(expression);
2810         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2811         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2812
2813         return new_d_Const(dbgi, tv);
2814 }
2815
2816 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2817                                      ir_entity *entity, type_t *type);
2818 static ir_initializer_t *create_ir_initializer(
2819                 const initializer_t *initializer, type_t *type);
2820
2821 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2822                                             initializer_t *initializer,
2823                                             type_t *type)
2824 {
2825         /* create the ir_initializer */
2826         ir_graph *const old_current_ir_graph = current_ir_graph;
2827         current_ir_graph = get_const_code_irg();
2828
2829         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2830
2831         assert(current_ir_graph == get_const_code_irg());
2832         current_ir_graph = old_current_ir_graph;
2833
2834         ident     *const id          = id_unique("initializer.%u");
2835         ir_type   *const irtype      = get_ir_type(type);
2836         ir_type   *const global_type = get_glob_type();
2837         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2838         set_entity_ld_ident(entity, id);
2839         set_entity_visibility(entity, ir_visibility_private);
2840         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2841         set_entity_initializer(entity, irinitializer);
2842         return entity;
2843 }
2844
2845 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2846 {
2847         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2848         type_t        *type        = expression->type;
2849         initializer_t *initializer = expression->initializer;
2850
2851         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2852                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2853                 return create_symconst(dbgi, entity);
2854         } else {
2855                 /* create an entity on the stack */
2856                 ident   *const id     = id_unique("CompLit.%u");
2857                 ir_type *const irtype = get_ir_type(type);
2858                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2859
2860                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2861                 set_entity_ld_ident(entity, id);
2862
2863                 /* create initialisation code */
2864                 create_local_initializer(initializer, dbgi, entity, type);
2865
2866                 /* create a sel for the compound literal address */
2867                 ir_node *frame = get_irg_frame(current_ir_graph);
2868                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2869                 return sel;
2870         }
2871 }
2872
2873 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2874 {
2875         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2876         type_t   *const type = expr->type;
2877         ir_node  *const addr = compound_literal_addr(expr);
2878         return deref_address(dbgi, type, addr);
2879 }
2880
2881 /**
2882  * Transform a sizeof expression into Firm code.
2883  */
2884 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2885 {
2886         type_t *const type = skip_typeref(expression->type);
2887         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2888         if (is_type_array(type) && type->array.is_vla
2889                         && expression->tp_expression != NULL) {
2890                 expression_to_firm(expression->tp_expression);
2891         }
2892
2893         return get_type_size_node(type);
2894 }
2895
2896 static entity_t *get_expression_entity(const expression_t *expression)
2897 {
2898         if (expression->kind != EXPR_REFERENCE)
2899                 return NULL;
2900
2901         return expression->reference.entity;
2902 }
2903
2904 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2905 {
2906         switch(entity->kind) {
2907         case DECLARATION_KIND_CASES:
2908                 return entity->declaration.alignment;
2909         case ENTITY_STRUCT:
2910         case ENTITY_UNION:
2911                 return entity->compound.alignment;
2912         case ENTITY_TYPEDEF:
2913                 return entity->typedefe.alignment;
2914         default:
2915                 break;
2916         }
2917         return 0;
2918 }
2919
2920 /**
2921  * Transform an alignof expression into Firm code.
2922  */
2923 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2924 {
2925         unsigned alignment = 0;
2926
2927         const expression_t *tp_expression = expression->tp_expression;
2928         if (tp_expression != NULL) {
2929                 entity_t *entity = get_expression_entity(tp_expression);
2930                 if (entity != NULL) {
2931                         alignment = get_cparser_entity_alignment(entity);
2932                 }
2933         }
2934
2935         if (alignment == 0) {
2936                 type_t *type = expression->type;
2937                 alignment = get_type_alignment(type);
2938         }
2939
2940         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2941         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2942         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2943         return new_d_Const(dbgi, tv);
2944 }
2945
2946 static void init_ir_types(void);
2947
2948 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2949 {
2950         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2951
2952         bool constant_folding_old = constant_folding;
2953         constant_folding = true;
2954         int old_optimize         = get_optimize();
2955         int old_constant_folding = get_opt_constant_folding();
2956         set_optimize(1);
2957         set_opt_constant_folding(1);
2958
2959         init_ir_types();
2960
2961         ir_graph *old_current_ir_graph = current_ir_graph;
2962         current_ir_graph = get_const_code_irg();
2963
2964         ir_node *const cnst = _expression_to_firm(expression);
2965
2966         current_ir_graph = old_current_ir_graph;
2967         set_optimize(old_optimize);
2968         set_opt_constant_folding(old_constant_folding);
2969
2970         if (!is_Const(cnst)) {
2971                 panic("couldn't fold constant");
2972         }
2973
2974         constant_folding = constant_folding_old;
2975
2976         ir_tarval *const tv   = get_Const_tarval(cnst);
2977         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2978         return tarval_convert_to(tv, mode);
2979 }
2980
2981 /* this function is only used in parser.c, but it relies on libfirm functionality */
2982 bool constant_is_negative(const expression_t *expression)
2983 {
2984         ir_tarval *tv = fold_constant_to_tarval(expression);
2985         return tarval_is_negative(tv);
2986 }
2987
2988 long fold_constant_to_int(const expression_t *expression)
2989 {
2990         ir_tarval *tv = fold_constant_to_tarval(expression);
2991         if (!tarval_is_long(tv)) {
2992                 panic("result of constant folding is not integer");
2993         }
2994
2995         return get_tarval_long(tv);
2996 }
2997
2998 bool fold_constant_to_bool(const expression_t *expression)
2999 {
3000         ir_tarval *tv = fold_constant_to_tarval(expression);
3001         return !tarval_is_null(tv);
3002 }
3003
3004 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3005 {
3006         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3007
3008         /* first try to fold a constant condition */
3009         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3010                 bool val = fold_constant_to_bool(expression->condition);
3011                 if (val) {
3012                         expression_t *true_expression = expression->true_expression;
3013                         if (true_expression == NULL)
3014                                 true_expression = expression->condition;
3015                         return expression_to_firm(true_expression);
3016                 } else {
3017                         return expression_to_firm(expression->false_expression);
3018                 }
3019         }
3020
3021         ir_node *const true_block  = new_immBlock();
3022         ir_node *const false_block = new_immBlock();
3023         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3024         mature_immBlock(true_block);
3025         mature_immBlock(false_block);
3026
3027         set_cur_block(true_block);
3028         ir_node *true_val;
3029         if (expression->true_expression != NULL) {
3030                 true_val = expression_to_firm(expression->true_expression);
3031         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3032                 true_val = cond_expr;
3033         } else {
3034                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3035                  * comparison.  Generate a "1" as value for the true branch. */
3036                 true_val = new_Const(get_mode_one(mode_Is));
3037         }
3038         ir_node *const true_jmp = new_d_Jmp(dbgi);
3039
3040         set_cur_block(false_block);
3041         ir_node *const false_val = expression_to_firm(expression->false_expression);
3042         ir_node *const false_jmp = new_d_Jmp(dbgi);
3043
3044         /* create the common block */
3045         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3046         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3047         set_cur_block(block);
3048
3049         /* TODO improve static semantics, so either both or no values are NULL */
3050         if (true_val == NULL || false_val == NULL)
3051                 return NULL;
3052
3053         ir_node *const in[2] = { true_val, false_val };
3054         type_t  *const type  = skip_typeref(expression->base.type);
3055         ir_mode *const mode  = get_ir_mode_arithmetic(type);
3056         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3057
3058         return val;
3059 }
3060
3061 /**
3062  * Returns an IR-node representing the address of a field.
3063  */
3064 static ir_node *select_addr(const select_expression_t *expression)
3065 {
3066         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3067
3068         construct_select_compound(expression);
3069
3070         ir_node *compound_addr = expression_to_firm(expression->compound);
3071
3072         entity_t *entry = expression->compound_entry;
3073         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3074         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3075
3076         if (constant_folding) {
3077                 ir_mode *mode      = get_irn_mode(compound_addr);
3078                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3079                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3080                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3081         } else {
3082                 ir_entity *irentity = entry->compound_member.entity;
3083                 assert(irentity != NULL);
3084                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3085         }
3086 }
3087
3088 static ir_node *select_to_firm(const select_expression_t *expression)
3089 {
3090         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3091         ir_node  *addr = select_addr(expression);
3092         type_t   *type = revert_automatic_type_conversion(
3093                         (const expression_t*) expression);
3094         type           = skip_typeref(type);
3095
3096         entity_t *entry = expression->compound_entry;
3097         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3098
3099         if (entry->compound_member.bitfield) {
3100                 return bitfield_extract_to_firm(expression, addr);
3101         }
3102
3103         return deref_address(dbgi, type, addr);
3104 }
3105
3106 /* Values returned by __builtin_classify_type. */
3107 typedef enum gcc_type_class
3108 {
3109         no_type_class = -1,
3110         void_type_class,
3111         integer_type_class,
3112         char_type_class,
3113         enumeral_type_class,
3114         boolean_type_class,
3115         pointer_type_class,
3116         reference_type_class,
3117         offset_type_class,
3118         real_type_class,
3119         complex_type_class,
3120         function_type_class,
3121         method_type_class,
3122         record_type_class,
3123         union_type_class,
3124         array_type_class,
3125         string_type_class,
3126         set_type_class,
3127         file_type_class,
3128         lang_type_class
3129 } gcc_type_class;
3130
3131 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3132 {
3133         type_t *type = expr->type_expression->base.type;
3134
3135         /* FIXME gcc returns different values depending on whether compiling C or C++
3136          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3137         gcc_type_class tc;
3138         for (;;) {
3139                 type = skip_typeref(type);
3140                 switch (type->kind) {
3141                         case TYPE_ATOMIC: {
3142                                 const atomic_type_t *const atomic_type = &type->atomic;
3143                                 switch (atomic_type->akind) {
3144                                         /* should not be reached */
3145                                         case ATOMIC_TYPE_INVALID:
3146                                                 tc = no_type_class;
3147                                                 goto make_const;
3148
3149                                         /* gcc cannot do that */
3150                                         case ATOMIC_TYPE_VOID:
3151                                                 tc = void_type_class;
3152                                                 goto make_const;
3153
3154                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3155                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3156                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3157                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3158                                         case ATOMIC_TYPE_SHORT:
3159                                         case ATOMIC_TYPE_USHORT:
3160                                         case ATOMIC_TYPE_INT:
3161                                         case ATOMIC_TYPE_UINT:
3162                                         case ATOMIC_TYPE_LONG:
3163                                         case ATOMIC_TYPE_ULONG:
3164                                         case ATOMIC_TYPE_LONGLONG:
3165                                         case ATOMIC_TYPE_ULONGLONG:
3166                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3167                                                 tc = integer_type_class;
3168                                                 goto make_const;
3169
3170                                         case ATOMIC_TYPE_FLOAT:
3171                                         case ATOMIC_TYPE_DOUBLE:
3172                                         case ATOMIC_TYPE_LONG_DOUBLE:
3173                                                 tc = real_type_class;
3174                                                 goto make_const;
3175                                 }
3176                                 panic("Unexpected atomic type in classify_type_to_firm().");
3177                         }
3178
3179                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3180                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3181                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3182                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3183                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3184                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3185                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3186
3187                         /* gcc handles this as integer */
3188                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3189
3190                         /* gcc classifies the referenced type */
3191                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3192
3193                         /* typedef/typeof should be skipped already */
3194                         case TYPE_TYPEDEF:
3195                         case TYPE_TYPEOF:
3196                         case TYPE_ERROR:
3197                                 break;
3198                 }
3199                 panic("unexpected TYPE classify_type_to_firm().");
3200         }
3201
3202 make_const:;
3203         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3204         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3205         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3206         return new_d_Const(dbgi, tv);
3207 }
3208
3209 static ir_node *function_name_to_firm(
3210                 const funcname_expression_t *const expr)
3211 {
3212         switch(expr->kind) {
3213         case FUNCNAME_FUNCTION:
3214         case FUNCNAME_PRETTY_FUNCTION:
3215         case FUNCNAME_FUNCDNAME:
3216                 if (current_function_name == NULL) {
3217                         const source_position_t *const src_pos = &expr->base.source_position;
3218                         const char    *name  = current_function_entity->base.symbol->string;
3219                         const string_t string = { name, strlen(name) + 1 };
3220                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3221                 }
3222                 return current_function_name;
3223         case FUNCNAME_FUNCSIG:
3224                 if (current_funcsig == NULL) {
3225                         const source_position_t *const src_pos = &expr->base.source_position;
3226                         ir_entity *ent = get_irg_entity(current_ir_graph);
3227                         const char *const name = get_entity_ld_name(ent);
3228                         const string_t string = { name, strlen(name) + 1 };
3229                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3230                 }
3231                 return current_funcsig;
3232         }
3233         panic("Unsupported function name");
3234 }
3235
3236 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3237 {
3238         statement_t *statement = expr->statement;
3239
3240         assert(statement->kind == STATEMENT_COMPOUND);
3241         return compound_statement_to_firm(&statement->compound);
3242 }
3243
3244 static ir_node *va_start_expression_to_firm(
3245         const va_start_expression_t *const expr)
3246 {
3247         ir_entity *param_ent = current_vararg_entity;
3248         if (param_ent == NULL) {
3249                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3250                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3251                 ir_type *const param_type  = get_unknown_type();
3252                 param_ent = new_parameter_entity(frame_type, n, param_type);
3253                 current_vararg_entity = param_ent;
3254         }
3255
3256         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3257         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3258         ir_node  *const no_mem  = new_NoMem();
3259         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3260
3261         set_value_for_expression(expr->ap, arg_sel);
3262
3263         return NULL;
3264 }
3265
3266 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3267 {
3268         type_t       *const type    = expr->base.type;
3269         expression_t *const ap_expr = expr->ap;
3270         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3271         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3272         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3273         ir_node      *const res     = deref_address(dbgi, type, ap);
3274
3275         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3276         ir_mode      *const mode    = get_irn_mode(cnst);
3277         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3278         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3279         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3280         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3281         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3282
3283         set_value_for_expression_addr(ap_expr, add, ap_addr);
3284
3285         return res;
3286 }
3287
3288 /**
3289  * Generate Firm for a va_copy expression.
3290  */
3291 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3292 {
3293         ir_node *const src = expression_to_firm(expr->src);
3294         set_value_for_expression(expr->dst, src);
3295         return NULL;
3296 }
3297
3298 static ir_node *dereference_addr(const unary_expression_t *const expression)
3299 {
3300         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3301         return expression_to_firm(expression->value);
3302 }
3303
3304 /**
3305  * Returns a IR-node representing an lvalue of the given expression.
3306  */
3307 static ir_node *expression_to_addr(const expression_t *expression)
3308 {
3309         switch(expression->kind) {
3310         case EXPR_ARRAY_ACCESS:
3311                 return array_access_addr(&expression->array_access);
3312         case EXPR_CALL:
3313                 return call_expression_to_firm(&expression->call);
3314         case EXPR_COMPOUND_LITERAL:
3315                 return compound_literal_addr(&expression->compound_literal);
3316         case EXPR_REFERENCE:
3317                 return reference_addr(&expression->reference);
3318         case EXPR_SELECT:
3319                 return select_addr(&expression->select);
3320         case EXPR_UNARY_DEREFERENCE:
3321                 return dereference_addr(&expression->unary);
3322         default:
3323                 break;
3324         }
3325         panic("trying to get address of non-lvalue");
3326 }
3327
3328 static ir_node *builtin_constant_to_firm(
3329                 const builtin_constant_expression_t *expression)
3330 {
3331         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3332         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3333         return create_Const_from_bool(mode, v);
3334 }
3335
3336 static ir_node *builtin_types_compatible_to_firm(
3337                 const builtin_types_compatible_expression_t *expression)
3338 {
3339         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3340         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3341         bool     const value = types_compatible(left, right);
3342         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3343         return create_Const_from_bool(mode, value);
3344 }
3345
3346 static ir_node *get_label_block(label_t *label)
3347 {
3348         if (label->block != NULL)
3349                 return label->block;
3350
3351         /* beware: might be called from create initializer with current_ir_graph
3352          * set to const_code_irg. */
3353         ir_graph *rem    = current_ir_graph;
3354         current_ir_graph = current_function;
3355
3356         ir_node *block = new_immBlock();
3357
3358         label->block = block;
3359
3360         ARR_APP1(label_t *, all_labels, label);
3361
3362         current_ir_graph = rem;
3363         return block;
3364 }
3365
3366 /**
3367  * Pointer to a label.  This is used for the
3368  * GNU address-of-label extension.
3369  */
3370 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3371 {
3372         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3373         ir_node   *block  = get_label_block(label->label);
3374         ir_entity *entity = create_Block_entity(block);
3375
3376         symconst_symbol value;
3377         value.entity_p = entity;
3378         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3379 }
3380
3381 /**
3382  * creates firm nodes for an expression. The difference between this function
3383  * and expression_to_firm is, that this version might produce mode_b nodes
3384  * instead of mode_Is.
3385  */
3386 static ir_node *_expression_to_firm(expression_t const *const expr)
3387 {
3388 #ifndef NDEBUG
3389         if (!constant_folding) {
3390                 assert(!expr->base.transformed);
3391                 ((expression_t*)expr)->base.transformed = true;
3392         }
3393 #endif
3394
3395         switch (expr->kind) {
3396         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3397         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3398         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3399         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3400         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3401         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3402         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3403         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3404         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3405         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3406         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3407         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3408         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3409         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3410         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3411         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3412         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3413         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3414         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3415         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3416         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3417         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3418         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3419
3420         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3421
3422         case EXPR_ERROR: break;
3423         }
3424         panic("invalid expression found");
3425 }
3426
3427 /**
3428  * Check if a given expression is a GNU __builtin_expect() call.
3429  */
3430 static bool is_builtin_expect(const expression_t *expression)
3431 {
3432         if (expression->kind != EXPR_CALL)
3433                 return false;
3434
3435         expression_t *function = expression->call.function;
3436         if (function->kind != EXPR_REFERENCE)
3437                 return false;
3438         reference_expression_t *ref = &function->reference;
3439         if (ref->entity->kind         != ENTITY_FUNCTION ||
3440             ref->entity->function.btk != BUILTIN_EXPECT)
3441                 return false;
3442
3443         return true;
3444 }
3445
3446 static bool produces_mode_b(const expression_t *expression)
3447 {
3448         switch (expression->kind) {
3449         case EXPR_BINARY_EQUAL:
3450         case EXPR_BINARY_NOTEQUAL:
3451         case EXPR_BINARY_LESS:
3452         case EXPR_BINARY_LESSEQUAL:
3453         case EXPR_BINARY_GREATER:
3454         case EXPR_BINARY_GREATEREQUAL:
3455         case EXPR_BINARY_ISGREATER:
3456         case EXPR_BINARY_ISGREATEREQUAL:
3457         case EXPR_BINARY_ISLESS:
3458         case EXPR_BINARY_ISLESSEQUAL:
3459         case EXPR_BINARY_ISLESSGREATER:
3460         case EXPR_BINARY_ISUNORDERED:
3461         case EXPR_UNARY_NOT:
3462                 return true;
3463
3464         case EXPR_CALL:
3465                 if (is_builtin_expect(expression)) {
3466                         expression_t *argument = expression->call.arguments->expression;
3467                         return produces_mode_b(argument);
3468                 }
3469                 return false;
3470         case EXPR_BINARY_COMMA:
3471                 return produces_mode_b(expression->binary.right);
3472
3473         default:
3474                 return false;
3475         }
3476 }
3477
3478 static ir_node *expression_to_firm(const expression_t *expression)
3479 {
3480         if (!produces_mode_b(expression)) {
3481                 ir_node *res = _expression_to_firm(expression);
3482                 assert(res == NULL || get_irn_mode(res) != mode_b);
3483                 return res;
3484         }
3485
3486         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3487                 return new_Const(fold_constant_to_tarval(expression));
3488         }
3489
3490         /* we have to produce a 0/1 from the mode_b expression */
3491         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3492         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3493         return produce_condition_result(expression, mode, dbgi);
3494 }
3495
3496 /**
3497  * create a short-circuit expression evaluation that tries to construct
3498  * efficient control flow structures for &&, || and ! expressions
3499  */
3500 static ir_node *create_condition_evaluation(const expression_t *expression,
3501                                             ir_node *true_block,
3502                                             ir_node *false_block)
3503 {
3504         switch(expression->kind) {
3505         case EXPR_UNARY_NOT: {
3506                 const unary_expression_t *unary_expression = &expression->unary;
3507                 create_condition_evaluation(unary_expression->value, false_block,
3508                                             true_block);
3509                 return NULL;
3510         }
3511         case EXPR_BINARY_LOGICAL_AND: {
3512                 const binary_expression_t *binary_expression = &expression->binary;
3513
3514                 ir_node *extra_block = new_immBlock();
3515                 create_condition_evaluation(binary_expression->left, extra_block,
3516                                             false_block);
3517                 mature_immBlock(extra_block);
3518                 set_cur_block(extra_block);
3519                 create_condition_evaluation(binary_expression->right, true_block,
3520                                             false_block);
3521                 return NULL;
3522         }
3523         case EXPR_BINARY_LOGICAL_OR: {
3524                 const binary_expression_t *binary_expression = &expression->binary;
3525
3526                 ir_node *extra_block = new_immBlock();
3527                 create_condition_evaluation(binary_expression->left, true_block,
3528                                             extra_block);
3529                 mature_immBlock(extra_block);
3530                 set_cur_block(extra_block);
3531                 create_condition_evaluation(binary_expression->right, true_block,
3532                                             false_block);
3533                 return NULL;
3534         }
3535         default:
3536                 break;
3537         }
3538
3539         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3540         ir_node  *cond_expr  = _expression_to_firm(expression);
3541         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3542         ir_node  *cond       = new_d_Cond(dbgi, condition);
3543         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3544         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3545
3546         /* set branch prediction info based on __builtin_expect */
3547         if (is_builtin_expect(expression) && is_Cond(cond)) {
3548                 call_argument_t *argument = expression->call.arguments->next;
3549                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3550                         bool               const cnst = fold_constant_to_bool(argument->expression);
3551                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3552                         set_Cond_jmp_pred(cond, pred);
3553                 }
3554         }
3555
3556         add_immBlock_pred(true_block, true_proj);
3557         add_immBlock_pred(false_block, false_proj);
3558
3559         set_unreachable_now();
3560         return cond_expr;
3561 }
3562
3563 static void create_variable_entity(entity_t *variable,
3564                                    declaration_kind_t declaration_kind,
3565                                    ir_type *parent_type)
3566 {
3567         assert(variable->kind == ENTITY_VARIABLE);
3568         type_t    *type = skip_typeref(variable->declaration.type);
3569
3570         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3571         ir_type   *const irtype    = get_ir_type(type);
3572         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3573         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3574         unsigned         alignment = variable->declaration.alignment;
3575
3576         set_entity_alignment(irentity, alignment);
3577
3578         handle_decl_modifiers(irentity, variable);
3579
3580         variable->declaration.kind  = (unsigned char) declaration_kind;
3581         variable->variable.v.entity = irentity;
3582         set_entity_ld_ident(irentity, create_ld_ident(variable));
3583
3584         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3585                 set_entity_volatility(irentity, volatility_is_volatile);
3586         }
3587 }
3588
3589
3590 typedef struct type_path_entry_t type_path_entry_t;
3591 struct type_path_entry_t {
3592         type_t           *type;
3593         ir_initializer_t *initializer;
3594         size_t            index;
3595         entity_t         *compound_entry;
3596 };
3597
3598 typedef struct type_path_t type_path_t;
3599 struct type_path_t {
3600         type_path_entry_t *path;
3601         type_t            *top_type;
3602         bool               invalid;
3603 };
3604
3605 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3606 {
3607         size_t len = ARR_LEN(path->path);
3608
3609         for (size_t i = 0; i < len; ++i) {
3610                 const type_path_entry_t *entry = & path->path[i];
3611
3612                 type_t *type = skip_typeref(entry->type);
3613                 if (is_type_compound(type)) {
3614                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3615                 } else if (is_type_array(type)) {
3616                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3617                 } else {
3618                         fprintf(stderr, "-INVALID-");
3619                 }
3620         }
3621         fprintf(stderr, "  (");
3622         print_type(path->top_type);
3623         fprintf(stderr, ")");
3624 }
3625
3626 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3627 {
3628         size_t len = ARR_LEN(path->path);
3629         assert(len > 0);
3630         return & path->path[len-1];
3631 }
3632
3633 static type_path_entry_t *append_to_type_path(type_path_t *path)
3634 {
3635         size_t len = ARR_LEN(path->path);
3636         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3637
3638         type_path_entry_t *result = & path->path[len];
3639         memset(result, 0, sizeof(result[0]));
3640         return result;
3641 }
3642
3643 static size_t get_compound_member_count(const compound_type_t *type)
3644 {
3645         compound_t *compound  = type->compound;
3646         size_t      n_members = 0;
3647         entity_t   *member    = compound->members.entities;
3648         for ( ; member != NULL; member = member->base.next) {
3649                 ++n_members;
3650         }
3651
3652         return n_members;
3653 }
3654
3655 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3656 {
3657         type_t *orig_top_type = path->top_type;
3658         type_t *top_type      = skip_typeref(orig_top_type);
3659
3660         assert(is_type_compound(top_type) || is_type_array(top_type));
3661
3662         if (ARR_LEN(path->path) == 0) {
3663                 return NULL;
3664         } else {
3665                 type_path_entry_t *top         = get_type_path_top(path);
3666                 ir_initializer_t  *initializer = top->initializer;
3667                 return get_initializer_compound_value(initializer, top->index);
3668         }
3669 }
3670
3671 static void descend_into_subtype(type_path_t *path)
3672 {
3673         type_t *orig_top_type = path->top_type;
3674         type_t *top_type      = skip_typeref(orig_top_type);
3675
3676         assert(is_type_compound(top_type) || is_type_array(top_type));
3677
3678         ir_initializer_t *initializer = get_initializer_entry(path);
3679
3680         type_path_entry_t *top = append_to_type_path(path);
3681         top->type              = top_type;
3682
3683         size_t len;
3684
3685         if (is_type_compound(top_type)) {
3686                 compound_t *const compound = top_type->compound.compound;
3687                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3688
3689                 top->compound_entry = entry;
3690                 top->index          = 0;
3691                 len                 = get_compound_member_count(&top_type->compound);
3692                 if (entry != NULL) {
3693                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3694                         path->top_type = entry->declaration.type;
3695                 }
3696         } else {
3697                 assert(is_type_array(top_type));
3698                 assert(top_type->array.size > 0);
3699
3700                 top->index     = 0;
3701                 path->top_type = top_type->array.element_type;
3702                 len            = top_type->array.size;
3703         }
3704         if (initializer == NULL
3705                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3706                 initializer = create_initializer_compound(len);
3707                 /* we have to set the entry at the 2nd latest path entry... */
3708                 size_t path_len = ARR_LEN(path->path);
3709                 assert(path_len >= 1);
3710                 if (path_len > 1) {
3711                         type_path_entry_t *entry        = & path->path[path_len-2];
3712                         ir_initializer_t  *tinitializer = entry->initializer;
3713                         set_initializer_compound_value(tinitializer, entry->index,
3714                                                        initializer);
3715                 }
3716         }
3717         top->initializer = initializer;
3718 }
3719
3720 static void ascend_from_subtype(type_path_t *path)
3721 {
3722         type_path_entry_t *top = get_type_path_top(path);
3723
3724         path->top_type = top->type;
3725
3726         size_t len = ARR_LEN(path->path);
3727         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3728 }
3729
3730 static void walk_designator(type_path_t *path, const designator_t *designator)
3731 {
3732         /* designators start at current object type */
3733         ARR_RESIZE(type_path_entry_t, path->path, 1);
3734
3735         for ( ; designator != NULL; designator = designator->next) {
3736                 type_path_entry_t *top         = get_type_path_top(path);
3737                 type_t            *orig_type   = top->type;
3738                 type_t            *type        = skip_typeref(orig_type);
3739
3740                 if (designator->symbol != NULL) {
3741                         assert(is_type_compound(type));
3742                         size_t    index  = 0;
3743                         symbol_t *symbol = designator->symbol;
3744
3745                         compound_t *compound = type->compound.compound;
3746                         entity_t   *iter     = compound->members.entities;
3747                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3748                                 if (iter->base.symbol == symbol) {
3749                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3750                                         break;
3751                                 }
3752                         }
3753                         assert(iter != NULL);
3754
3755                         /* revert previous initialisations of other union elements */
3756                         if (type->kind == TYPE_COMPOUND_UNION) {
3757                                 ir_initializer_t *initializer = top->initializer;
3758                                 if (initializer != NULL
3759                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3760                                         /* are we writing to a new element? */
3761                                         ir_initializer_t *oldi
3762                                                 = get_initializer_compound_value(initializer, index);
3763                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3764                                                 /* clear initializer */
3765                                                 size_t len
3766                                                         = get_initializer_compound_n_entries(initializer);
3767                                                 ir_initializer_t *nulli = get_initializer_null();
3768                                                 for (size_t i = 0; i < len; ++i) {
3769                                                         set_initializer_compound_value(initializer, i,
3770                                                                                        nulli);
3771                                                 }
3772                                         }
3773                                 }
3774                         }
3775
3776                         top->type           = orig_type;
3777                         top->compound_entry = iter;
3778                         top->index          = index;
3779                         orig_type           = iter->declaration.type;
3780                 } else {
3781                         expression_t *array_index = designator->array_index;
3782                         assert(designator->array_index != NULL);
3783                         assert(is_type_array(type));
3784
3785                         long index = fold_constant_to_int(array_index);
3786                         assert(index >= 0);
3787 #ifndef NDEBUG
3788                         if (type->array.size_constant) {
3789                                 long array_size = type->array.size;
3790                                 assert(index < array_size);
3791                         }
3792 #endif
3793
3794                         top->type  = orig_type;
3795                         top->index = (size_t) index;
3796                         orig_type  = type->array.element_type;
3797                 }
3798                 path->top_type = orig_type;
3799
3800                 if (designator->next != NULL) {
3801                         descend_into_subtype(path);
3802                 }
3803         }
3804
3805         path->invalid  = false;
3806 }
3807
3808 static void advance_current_object(type_path_t *path)
3809 {
3810         if (path->invalid) {
3811                 /* TODO: handle this... */
3812                 panic("invalid initializer in ast2firm (excessive elements)");
3813         }
3814
3815         type_path_entry_t *top = get_type_path_top(path);
3816
3817         type_t *type = skip_typeref(top->type);
3818         if (is_type_union(type)) {
3819                 /* only the first element is initialized in unions */
3820                 top->compound_entry = NULL;
3821         } else if (is_type_struct(type)) {
3822                 entity_t *entry = top->compound_entry;
3823
3824                 top->index++;
3825                 entry               = skip_unnamed_bitfields(entry->base.next);
3826                 top->compound_entry = entry;
3827                 if (entry != NULL) {
3828                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3829                         path->top_type = entry->declaration.type;
3830                         return;
3831                 }
3832         } else {
3833                 assert(is_type_array(type));
3834
3835                 top->index++;
3836                 if (!type->array.size_constant || top->index < type->array.size) {
3837                         return;
3838                 }
3839         }
3840
3841         /* we're past the last member of the current sub-aggregate, try if we
3842          * can ascend in the type hierarchy and continue with another subobject */
3843         size_t len = ARR_LEN(path->path);
3844
3845         if (len > 1) {
3846                 ascend_from_subtype(path);
3847                 advance_current_object(path);
3848         } else {
3849                 path->invalid = true;
3850         }
3851 }
3852
3853
3854 static ir_initializer_t *create_ir_initializer_value(
3855                 const initializer_value_t *initializer)
3856 {
3857         if (is_type_compound(initializer->value->base.type)) {
3858                 panic("initializer creation for compounds not implemented yet");
3859         }
3860         type_t       *type = initializer->value->base.type;
3861         expression_t *expr = initializer->value;
3862         ir_node *value = expression_to_firm(expr);
3863         ir_mode *mode  = get_ir_mode_storage(type);
3864         value          = create_conv(NULL, value, mode);
3865         return create_initializer_const(value);
3866 }
3867
3868 /** test wether type can be initialized by a string constant */
3869 static bool is_string_type(type_t *type)
3870 {
3871         type_t *inner;
3872         if (is_type_pointer(type)) {
3873                 inner = skip_typeref(type->pointer.points_to);
3874         } else if(is_type_array(type)) {
3875                 inner = skip_typeref(type->array.element_type);
3876         } else {
3877                 return false;
3878         }
3879
3880         return is_type_integer(inner);
3881 }
3882
3883 static ir_initializer_t *create_ir_initializer_list(
3884                 const initializer_list_t *initializer, type_t *type)
3885 {
3886         type_path_t path;
3887         memset(&path, 0, sizeof(path));
3888         path.top_type = type;
3889         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3890
3891         descend_into_subtype(&path);
3892
3893         for (size_t i = 0; i < initializer->len; ++i) {
3894                 const initializer_t *sub_initializer = initializer->initializers[i];
3895
3896                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3897                         walk_designator(&path, sub_initializer->designator.designator);
3898                         continue;
3899                 }
3900
3901                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3902                         /* we might have to descend into types until we're at a scalar
3903                          * type */
3904                         while(true) {
3905                                 type_t *orig_top_type = path.top_type;
3906                                 type_t *top_type      = skip_typeref(orig_top_type);
3907
3908                                 if (is_type_scalar(top_type))
3909                                         break;
3910                                 descend_into_subtype(&path);
3911                         }
3912                 } else if (sub_initializer->kind == INITIALIZER_STRING
3913                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3914                         /* we might have to descend into types until we're at a scalar
3915                          * type */
3916                         while (true) {
3917                                 type_t *orig_top_type = path.top_type;
3918                                 type_t *top_type      = skip_typeref(orig_top_type);
3919
3920                                 if (is_string_type(top_type))
3921                                         break;
3922                                 descend_into_subtype(&path);
3923                         }
3924                 }
3925
3926                 ir_initializer_t *sub_irinitializer
3927                         = create_ir_initializer(sub_initializer, path.top_type);
3928
3929                 size_t path_len = ARR_LEN(path.path);
3930                 assert(path_len >= 1);
3931                 type_path_entry_t *entry        = & path.path[path_len-1];
3932                 ir_initializer_t  *tinitializer = entry->initializer;
3933                 set_initializer_compound_value(tinitializer, entry->index,
3934                                                sub_irinitializer);
3935
3936                 advance_current_object(&path);
3937         }
3938
3939         assert(ARR_LEN(path.path) >= 1);
3940         ir_initializer_t *result = path.path[0].initializer;
3941         DEL_ARR_F(path.path);
3942
3943         return result;
3944 }
3945
3946 static ir_initializer_t *create_ir_initializer_string(
3947                 const initializer_string_t *initializer, type_t *type)
3948 {
3949         type = skip_typeref(type);
3950
3951         size_t            string_len    = initializer->string.size;
3952         assert(type->kind == TYPE_ARRAY);
3953         assert(type->array.size_constant);
3954         size_t            len           = type->array.size;
3955         ir_initializer_t *irinitializer = create_initializer_compound(len);
3956
3957         const char *string = initializer->string.begin;
3958         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3959
3960         for (size_t i = 0; i < len; ++i) {
3961                 char c = 0;
3962                 if (i < string_len)
3963                         c = string[i];
3964
3965                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3966                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3967
3968                 set_initializer_compound_value(irinitializer, i, char_initializer);
3969         }
3970
3971         return irinitializer;
3972 }
3973
3974 static ir_initializer_t *create_ir_initializer_wide_string(
3975                 const initializer_wide_string_t *initializer, type_t *type)
3976 {
3977         assert(type->kind == TYPE_ARRAY);
3978         assert(type->array.size_constant);
3979         size_t            len           = type->array.size;
3980         size_t            string_len    = wstrlen(&initializer->string);
3981         ir_initializer_t *irinitializer = create_initializer_compound(len);
3982
3983         const char *p    = initializer->string.begin;
3984         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
3985
3986         for (size_t i = 0; i < len; ++i) {
3987                 utf32 c = 0;
3988                 if (i < string_len) {
3989                         c = read_utf8_char(&p);
3990                 }
3991                 ir_tarval *tv = new_tarval_from_long(c, mode);
3992                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3993
3994                 set_initializer_compound_value(irinitializer, i, char_initializer);
3995         }
3996
3997         return irinitializer;
3998 }
3999
4000 static ir_initializer_t *create_ir_initializer(
4001                 const initializer_t *initializer, type_t *type)
4002 {
4003         switch(initializer->kind) {
4004                 case INITIALIZER_STRING:
4005                         return create_ir_initializer_string(&initializer->string, type);
4006
4007                 case INITIALIZER_WIDE_STRING:
4008                         return create_ir_initializer_wide_string(&initializer->wide_string,
4009                                                                  type);
4010
4011                 case INITIALIZER_LIST:
4012                         return create_ir_initializer_list(&initializer->list, type);
4013
4014                 case INITIALIZER_VALUE:
4015                         return create_ir_initializer_value(&initializer->value);
4016
4017                 case INITIALIZER_DESIGNATOR:
4018                         panic("unexpected designator initializer found");
4019         }
4020         panic("unknown initializer");
4021 }
4022
4023 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4024  *  are elements [...] the remainder of the aggregate shall be initialized
4025  *  implicitly the same as objects that have static storage duration. */
4026 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4027                 ir_node *base_addr)
4028 {
4029         /* for unions we must NOT do anything for null initializers */
4030         ir_type *owner = get_entity_owner(entity);
4031         if (is_Union_type(owner)) {
4032                 return;
4033         }
4034
4035         ir_type *ent_type = get_entity_type(entity);
4036         /* create sub-initializers for a compound type */
4037         if (is_compound_type(ent_type)) {
4038                 unsigned n_members = get_compound_n_members(ent_type);
4039                 for (unsigned n = 0; n < n_members; ++n) {
4040                         ir_entity *member = get_compound_member(ent_type, n);
4041                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4042                                                                 member);
4043                         create_dynamic_null_initializer(member, dbgi, addr);
4044                 }
4045                 return;
4046         }
4047         if (is_Array_type(ent_type)) {
4048                 assert(has_array_upper_bound(ent_type, 0));
4049                 long n = get_array_upper_bound_int(ent_type, 0);
4050                 for (long i = 0; i < n; ++i) {
4051                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4052                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4053                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4054                         ir_node   *in[1]    = { cnst };
4055                         ir_entity *arrent   = get_array_element_entity(ent_type);
4056                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4057                                                         arrent);
4058                         create_dynamic_null_initializer(arrent, dbgi, addr);
4059                 }
4060                 return;
4061         }
4062
4063         ir_mode *value_mode = get_type_mode(ent_type);
4064         ir_node *node       = new_Const(get_mode_null(value_mode));
4065
4066         /* is it a bitfield type? */
4067         if (is_Primitive_type(ent_type) &&
4068                         get_primitive_base_type(ent_type) != NULL) {
4069                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4070                 return;
4071         }
4072
4073         ir_node *mem    = get_store();
4074         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4075         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4076         set_store(proj_m);
4077 }
4078
4079 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4080                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4081 {
4082         switch(get_initializer_kind(initializer)) {
4083         case IR_INITIALIZER_NULL:
4084                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4085                 return;
4086         case IR_INITIALIZER_CONST: {
4087                 ir_node *node     = get_initializer_const_value(initializer);
4088                 ir_type *ent_type = get_entity_type(entity);
4089
4090                 /* is it a bitfield type? */
4091                 if (is_Primitive_type(ent_type) &&
4092                                 get_primitive_base_type(ent_type) != NULL) {
4093                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4094                         return;
4095                 }
4096
4097                 assert(get_type_mode(type) == get_irn_mode(node));
4098                 ir_node *mem    = get_store();
4099                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4100                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4101                 set_store(proj_m);
4102                 return;
4103         }
4104         case IR_INITIALIZER_TARVAL: {
4105                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4106                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4107                 ir_type   *ent_type = get_entity_type(entity);
4108
4109                 /* is it a bitfield type? */
4110                 if (is_Primitive_type(ent_type) &&
4111                                 get_primitive_base_type(ent_type) != NULL) {
4112                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4113                         return;
4114                 }
4115
4116                 assert(get_type_mode(type) == get_tarval_mode(tv));
4117                 ir_node *mem    = get_store();
4118                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4119                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4120                 set_store(proj_m);
4121                 return;
4122         }
4123         case IR_INITIALIZER_COMPOUND: {
4124                 assert(is_compound_type(type) || is_Array_type(type));
4125                 int n_members;
4126                 if (is_Array_type(type)) {
4127                         assert(has_array_upper_bound(type, 0));
4128                         n_members = get_array_upper_bound_int(type, 0);
4129                 } else {
4130                         n_members = get_compound_n_members(type);
4131                 }
4132
4133                 if (get_initializer_compound_n_entries(initializer)
4134                                 != (unsigned) n_members)
4135                         panic("initializer doesn't match compound type");
4136
4137                 for (int i = 0; i < n_members; ++i) {
4138                         ir_node   *addr;
4139                         ir_type   *irtype;
4140                         ir_entity *sub_entity;
4141                         if (is_Array_type(type)) {
4142                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4143                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4144                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4145                                 ir_node   *in[1]    = { cnst };
4146                                 irtype     = get_array_element_type(type);
4147                                 sub_entity = get_array_element_entity(type);
4148                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4149                                                        sub_entity);
4150                         } else {
4151                                 sub_entity = get_compound_member(type, i);
4152                                 irtype     = get_entity_type(sub_entity);
4153                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4154                                                              sub_entity);
4155                         }
4156
4157                         ir_initializer_t *sub_init
4158                                 = get_initializer_compound_value(initializer, i);
4159
4160                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4161                                                        addr);
4162                 }
4163                 return;
4164         }
4165         }
4166
4167         panic("invalid IR_INITIALIZER found");
4168 }
4169
4170 static void create_dynamic_initializer(ir_initializer_t *initializer,
4171                 dbg_info *dbgi, ir_entity *entity)
4172 {
4173         ir_node *frame     = get_irg_frame(current_ir_graph);
4174         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4175         ir_type *type      = get_entity_type(entity);
4176
4177         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4178 }
4179
4180 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4181                                      ir_entity *entity, type_t *type)
4182 {
4183         ir_node *memory = get_store();
4184         ir_node *nomem  = new_NoMem();
4185         ir_node *frame  = get_irg_frame(current_ir_graph);
4186         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4187
4188         if (initializer->kind == INITIALIZER_VALUE) {
4189                 initializer_value_t *initializer_value = &initializer->value;
4190
4191                 ir_node *value = expression_to_firm(initializer_value->value);
4192                 type = skip_typeref(type);
4193                 assign_value(dbgi, addr, type, value);
4194                 return;
4195         }
4196
4197         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4198                 ir_initializer_t *irinitializer
4199                         = create_ir_initializer(initializer, type);
4200
4201                 create_dynamic_initializer(irinitializer, dbgi, entity);
4202                 return;
4203         }
4204
4205         /* create a "template" entity which is copied to the entity on the stack */
4206         ir_entity *const init_entity
4207                 = create_initializer_entity(dbgi, initializer, type);
4208         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4209         ir_type *const irtype   = get_ir_type(type);
4210         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4211
4212         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4213         set_store(copyb_mem);
4214 }
4215
4216 static void create_initializer_local_variable_entity(entity_t *entity)
4217 {
4218         assert(entity->kind == ENTITY_VARIABLE);
4219         initializer_t *initializer = entity->variable.initializer;
4220         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4221         ir_entity     *irentity    = entity->variable.v.entity;
4222         type_t        *type        = entity->declaration.type;
4223
4224         create_local_initializer(initializer, dbgi, irentity, type);
4225 }
4226
4227 static void create_variable_initializer(entity_t *entity)
4228 {
4229         assert(entity->kind == ENTITY_VARIABLE);
4230         initializer_t *initializer = entity->variable.initializer;
4231         if (initializer == NULL)
4232                 return;
4233
4234         declaration_kind_t declaration_kind
4235                 = (declaration_kind_t) entity->declaration.kind;
4236         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4237                 create_initializer_local_variable_entity(entity);
4238                 return;
4239         }
4240
4241         type_t            *type = entity->declaration.type;
4242         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4243
4244         if (initializer->kind == INITIALIZER_VALUE) {
4245                 expression_t *      value     = initializer->value.value;
4246                 type_t       *const init_type = skip_typeref(value->base.type);
4247
4248                 if (!is_type_scalar(init_type)) {
4249                         /* skip convs */
4250                         while (value->kind == EXPR_UNARY_CAST)
4251                                 value = value->unary.value;
4252
4253                         if (value->kind != EXPR_COMPOUND_LITERAL)
4254                                 panic("expected non-scalar initializer to be a compound literal");
4255                         initializer = value->compound_literal.initializer;
4256                         goto have_initializer;
4257                 }
4258
4259                 ir_node  *      node = expression_to_firm(value);
4260                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4261                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4262                 node = create_conv(dbgi, node, mode);
4263                 node = do_strict_conv(dbgi, node);
4264
4265                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4266                         set_value(entity->variable.v.value_number, node);
4267                 } else {
4268                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4269
4270                         ir_entity *irentity = entity->variable.v.entity;
4271
4272                         if (tq & TYPE_QUALIFIER_CONST
4273                                         && get_entity_owner(irentity) != get_tls_type()) {
4274                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4275                         }
4276                         set_atomic_ent_value(irentity, node);
4277                 }
4278         } else {
4279 have_initializer:
4280                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4281                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4282
4283                 ir_entity        *irentity        = entity->variable.v.entity;
4284                 ir_initializer_t *irinitializer
4285                         = create_ir_initializer(initializer, type);
4286
4287                 if (tq & TYPE_QUALIFIER_CONST) {
4288                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4289                 }
4290                 set_entity_initializer(irentity, irinitializer);
4291         }
4292 }
4293
4294 static void create_variable_length_array(entity_t *entity)
4295 {
4296         assert(entity->kind == ENTITY_VARIABLE);
4297         assert(entity->variable.initializer == NULL);
4298
4299         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4300         entity->variable.v.vla_base = NULL;
4301
4302         /* TODO: record VLA somewhere so we create the free node when we leave
4303          * it's scope */
4304 }
4305
4306 static void allocate_variable_length_array(entity_t *entity)
4307 {
4308         assert(entity->kind == ENTITY_VARIABLE);
4309         assert(entity->variable.initializer == NULL);
4310         assert(currently_reachable());
4311
4312         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4313         type_t   *type      = entity->declaration.type;
4314         ir_type  *el_type   = get_ir_type(type->array.element_type);
4315
4316         /* make sure size_node is calculated */
4317         get_type_size_node(type);
4318         ir_node  *elems = type->array.size_node;
4319         ir_node  *mem   = get_store();
4320         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4321
4322         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4323         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4324         set_store(proj_m);
4325
4326         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4327         entity->variable.v.vla_base = addr;
4328 }
4329
4330 /**
4331  * Creates a Firm local variable from a declaration.
4332  */
4333 static void create_local_variable(entity_t *entity)
4334 {
4335         assert(entity->kind == ENTITY_VARIABLE);
4336         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4337
4338         bool needs_entity = entity->variable.address_taken;
4339         type_t *type = skip_typeref(entity->declaration.type);
4340
4341         /* is it a variable length array? */
4342         if (is_type_array(type) && !type->array.size_constant) {
4343                 create_variable_length_array(entity);
4344                 return;
4345         } else if (is_type_array(type) || is_type_compound(type)) {
4346                 needs_entity = true;
4347         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4348                 needs_entity = true;
4349         }
4350
4351         if (needs_entity) {
4352                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4353                 create_variable_entity(entity,
4354                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4355                                        frame_type);
4356         } else {
4357                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4358                 entity->variable.v.value_number = next_value_number_function;
4359                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4360                                         entity);
4361                 ++next_value_number_function;
4362         }
4363 }
4364
4365 static void create_local_static_variable(entity_t *entity)
4366 {
4367         assert(entity->kind == ENTITY_VARIABLE);
4368         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4369
4370         type_t   *type           = skip_typeref(entity->declaration.type);
4371         ir_type  *const var_type = entity->variable.thread_local ?
4372                 get_tls_type() : get_glob_type();
4373         ir_type  *const irtype   = get_ir_type(type);
4374         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4375
4376         size_t l = strlen(entity->base.symbol->string);
4377         char   buf[l + sizeof(".%u")];
4378         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4379         ident     *const id       = id_unique(buf);
4380         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4381
4382         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4383                 set_entity_volatility(irentity, volatility_is_volatile);
4384         }
4385
4386         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4387         entity->variable.v.entity = irentity;
4388
4389         set_entity_ld_ident(irentity, id);
4390         set_entity_visibility(irentity, ir_visibility_local);
4391
4392         if (entity->variable.initializer == NULL) {
4393                 ir_initializer_t *null_init = get_initializer_null();
4394                 set_entity_initializer(irentity, null_init);
4395         }
4396
4397         ir_graph *const old_current_ir_graph = current_ir_graph;
4398         current_ir_graph = get_const_code_irg();
4399
4400         create_variable_initializer(entity);
4401
4402         assert(current_ir_graph == get_const_code_irg());
4403         current_ir_graph = old_current_ir_graph;
4404 }
4405
4406
4407
4408 static ir_node *return_statement_to_firm(return_statement_t *statement)
4409 {
4410         if (!currently_reachable())
4411                 return NULL;
4412
4413         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4414         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4415         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4416
4417         int in_len;
4418         if (!is_type_void(type)) {
4419                 ir_mode *const mode = get_ir_mode_storage(type);
4420                 if (res) {
4421                         res = create_conv(dbgi, res, mode);
4422                         res = do_strict_conv(dbgi, res);
4423                 } else {
4424                         res = new_Unknown(mode);
4425                 }
4426                 in_len = 1;
4427         } else {
4428                 in_len = 0;
4429         }
4430
4431         ir_node *const in[1] = { res };
4432         ir_node *const store = get_store();
4433         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4434
4435         ir_node *end_block = get_irg_end_block(current_ir_graph);
4436         add_immBlock_pred(end_block, ret);
4437
4438         set_unreachable_now();
4439         return NULL;
4440 }
4441
4442 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4443 {
4444         if (!currently_reachable())
4445                 return NULL;
4446
4447         return expression_to_firm(statement->expression);
4448 }
4449
4450 static void create_local_declarations(entity_t*);
4451
4452 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4453 {
4454         create_local_declarations(compound->scope.entities);
4455
4456         ir_node     *result    = NULL;
4457         statement_t *statement = compound->statements;
4458         for ( ; statement != NULL; statement = statement->base.next) {
4459                 result = statement_to_firm(statement);
4460         }
4461
4462         return result;
4463 }
4464
4465 static void create_global_variable(entity_t *entity)
4466 {
4467         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4468         ir_visibility       visibility = ir_visibility_external;
4469         storage_class_tag_t storage
4470                 = (storage_class_tag_t)entity->declaration.storage_class;
4471         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4472         assert(entity->kind == ENTITY_VARIABLE);
4473
4474         switch (storage) {
4475         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4476         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4477         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4478         case STORAGE_CLASS_TYPEDEF:
4479         case STORAGE_CLASS_AUTO:
4480         case STORAGE_CLASS_REGISTER:
4481                 panic("invalid storage class for global var");
4482         }
4483
4484         /* "common" symbols */
4485         if (storage == STORAGE_CLASS_NONE
4486             && entity->variable.initializer == NULL
4487             && !entity->variable.thread_local
4488             && (modifiers & DM_WEAK) == 0) {
4489                 linkage |= IR_LINKAGE_MERGE;
4490         }
4491
4492         ir_type *var_type = get_glob_type();
4493         if (entity->variable.thread_local) {
4494                 var_type = get_tls_type();
4495         }
4496         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4497         ir_entity *irentity = entity->variable.v.entity;
4498         add_entity_linkage(irentity, linkage);
4499         set_entity_visibility(irentity, visibility);
4500         if (entity->variable.initializer == NULL
4501             && storage != STORAGE_CLASS_EXTERN) {
4502                 ir_initializer_t *null_init = get_initializer_null();
4503                 set_entity_initializer(irentity, null_init);
4504         }
4505 }
4506
4507 static void create_local_declaration(entity_t *entity)
4508 {
4509         assert(is_declaration(entity));
4510
4511         /* construct type */
4512         (void) get_ir_type(entity->declaration.type);
4513         if (entity->base.symbol == NULL) {
4514                 return;
4515         }
4516
4517         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4518         case STORAGE_CLASS_STATIC:
4519                 if (entity->kind == ENTITY_FUNCTION) {
4520                         (void)get_function_entity(entity, NULL);
4521                 } else {
4522                         create_local_static_variable(entity);
4523                 }
4524                 return;
4525         case STORAGE_CLASS_EXTERN:
4526                 if (entity->kind == ENTITY_FUNCTION) {
4527                         assert(entity->function.statement == NULL);
4528                         (void)get_function_entity(entity, NULL);
4529                 } else {
4530                         create_global_variable(entity);
4531                         create_variable_initializer(entity);
4532                 }
4533                 return;
4534         case STORAGE_CLASS_NONE:
4535         case STORAGE_CLASS_AUTO:
4536         case STORAGE_CLASS_REGISTER:
4537                 if (entity->kind == ENTITY_FUNCTION) {
4538                         if (entity->function.statement != NULL) {
4539                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4540                                 (void)get_function_entity(entity, owner);
4541                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4542                                 enqueue_inner_function(entity);
4543                         } else {
4544                                 (void)get_function_entity(entity, NULL);
4545                         }
4546                 } else {
4547                         create_local_variable(entity);
4548                 }
4549                 return;
4550         case STORAGE_CLASS_TYPEDEF:
4551                 break;
4552         }
4553         panic("invalid storage class found");
4554 }
4555
4556 static void create_local_declarations(entity_t *e)
4557 {
4558         for (; e; e = e->base.next) {
4559                 if (is_declaration(e))
4560                         create_local_declaration(e);
4561         }
4562 }
4563
4564 static void initialize_local_declaration(entity_t *entity)
4565 {
4566         if (entity->base.symbol == NULL)
4567                 return;
4568
4569         // no need to emit code in dead blocks
4570         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4571                         && !currently_reachable())
4572                 return;
4573
4574         switch ((declaration_kind_t) entity->declaration.kind) {
4575         case DECLARATION_KIND_LOCAL_VARIABLE:
4576         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4577                 create_variable_initializer(entity);
4578                 return;
4579
4580         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4581                 allocate_variable_length_array(entity);
4582                 return;
4583
4584         case DECLARATION_KIND_COMPOUND_MEMBER:
4585         case DECLARATION_KIND_GLOBAL_VARIABLE:
4586         case DECLARATION_KIND_FUNCTION:
4587         case DECLARATION_KIND_INNER_FUNCTION:
4588                 return;
4589
4590         case DECLARATION_KIND_PARAMETER:
4591         case DECLARATION_KIND_PARAMETER_ENTITY:
4592                 panic("can't initialize parameters");
4593
4594         case DECLARATION_KIND_UNKNOWN:
4595                 panic("can't initialize unknown declaration");
4596         }
4597         panic("invalid declaration kind");
4598 }
4599
4600 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4601 {
4602         entity_t *entity = statement->declarations_begin;
4603         if (entity == NULL)
4604                 return NULL;
4605
4606         entity_t *const last = statement->declarations_end;
4607         for ( ;; entity = entity->base.next) {
4608                 if (is_declaration(entity)) {
4609                         initialize_local_declaration(entity);
4610                 } else if (entity->kind == ENTITY_TYPEDEF) {
4611                         /* §6.7.7:3  Any array size expressions associated with variable length
4612                          * array declarators are evaluated each time the declaration of the
4613                          * typedef name is reached in the order of execution. */
4614                         type_t *const type = skip_typeref(entity->typedefe.type);
4615                         if (is_type_array(type) && type->array.is_vla)
4616                                 get_vla_size(&type->array);
4617                 }
4618                 if (entity == last)
4619                         break;
4620         }
4621
4622         return NULL;
4623 }
4624
4625 static ir_node *if_statement_to_firm(if_statement_t *statement)
4626 {
4627         create_local_declarations(statement->scope.entities);
4628
4629         /* Create the condition. */
4630         ir_node *true_block  = NULL;
4631         ir_node *false_block = NULL;
4632         if (currently_reachable()) {
4633                 true_block  = new_immBlock();
4634                 false_block = new_immBlock();
4635                 create_condition_evaluation(statement->condition, true_block, false_block);
4636                 mature_immBlock(true_block);
4637                 mature_immBlock(false_block);
4638         }
4639
4640         /* Create the true statement. */
4641         set_cur_block(true_block);
4642         statement_to_firm(statement->true_statement);
4643         ir_node *fallthrough_block = get_cur_block();
4644
4645         /* Create the false statement. */
4646         set_cur_block(false_block);
4647         if (statement->false_statement != NULL) {
4648                 statement_to_firm(statement->false_statement);
4649         }
4650
4651         /* Handle the block after the if-statement.  Minor simplification and
4652          * optimisation: Reuse the false/true block as fallthrough block, if the
4653          * true/false statement does not pass control to the fallthrough block, e.g.
4654          * in the typical if (x) return; pattern. */
4655         if (fallthrough_block) {
4656                 if (currently_reachable()) {
4657                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4658                         ir_node *const f_jump = new_Jmp();
4659                         ir_node *const in[]   = { t_jump, f_jump };
4660                         fallthrough_block = new_Block(2, in);
4661                 }
4662                 set_cur_block(fallthrough_block);
4663         }
4664
4665         return NULL;
4666 }
4667
4668 /**
4669  * Add an unconditional jump to the target block.  If the source block is not
4670  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4671  * loops.  This is necessary if the jump potentially enters a loop.
4672  */
4673 static void jump_to(ir_node *const target_block)
4674 {
4675         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4676         add_immBlock_pred(target_block, pred);
4677 }
4678
4679 /**
4680  * Add an unconditional jump to the target block, if the current block is
4681  * reachable and do nothing otherwise.  This is only valid if the jump does not
4682  * enter a loop (a back edge is ok).
4683  */
4684 static void jump_if_reachable(ir_node *const target_block)
4685 {
4686         if (currently_reachable())
4687                 add_immBlock_pred(target_block, new_Jmp());
4688 }
4689
4690 static ir_node *while_statement_to_firm(while_statement_t *statement)
4691 {
4692         create_local_declarations(statement->scope.entities);
4693
4694         /* Create the header block */
4695         ir_node *const header_block = new_immBlock();
4696         jump_to(header_block);
4697
4698         /* Create the condition. */
4699         ir_node      *      body_block;
4700         ir_node      *      false_block;
4701         expression_t *const cond = statement->condition;
4702         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4703                         fold_constant_to_bool(cond)) {
4704                 /* Shortcut for while (true). */
4705                 body_block  = header_block;
4706                 false_block = NULL;
4707
4708                 keep_alive(header_block);
4709                 keep_all_memory(header_block);
4710         } else {
4711                 body_block  = new_immBlock();
4712                 false_block = new_immBlock();
4713
4714                 set_cur_block(header_block);
4715                 create_condition_evaluation(cond, body_block, false_block);
4716                 mature_immBlock(body_block);
4717         }
4718
4719         ir_node *const old_continue_label = continue_label;
4720         ir_node *const old_break_label    = break_label;
4721         continue_label = header_block;
4722         break_label    = false_block;
4723
4724         /* Create the loop body. */
4725         set_cur_block(body_block);
4726         statement_to_firm(statement->body);
4727         jump_if_reachable(header_block);
4728
4729         mature_immBlock(header_block);
4730         assert(false_block == NULL || false_block == break_label);
4731         false_block = break_label;
4732         if (false_block != NULL) {
4733                 mature_immBlock(false_block);
4734         }
4735         set_cur_block(false_block);
4736
4737         assert(continue_label == header_block);
4738         continue_label = old_continue_label;
4739         break_label    = old_break_label;
4740         return NULL;
4741 }
4742
4743 static ir_node *get_break_label(void)
4744 {
4745         if (break_label == NULL) {
4746                 break_label = new_immBlock();
4747         }
4748         return break_label;
4749 }
4750
4751 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4752 {
4753         create_local_declarations(statement->scope.entities);
4754
4755         /* create the header block */
4756         ir_node *header_block = new_immBlock();
4757
4758         /* the loop body */
4759         ir_node *body_block = new_immBlock();
4760         jump_to(body_block);
4761
4762         ir_node *old_continue_label = continue_label;
4763         ir_node *old_break_label    = break_label;
4764         continue_label              = header_block;
4765         break_label                 = NULL;
4766
4767         set_cur_block(body_block);
4768         statement_to_firm(statement->body);
4769         ir_node *const false_block = get_break_label();
4770
4771         assert(continue_label == header_block);
4772         continue_label = old_continue_label;
4773         break_label    = old_break_label;
4774
4775         jump_if_reachable(header_block);
4776
4777         /* create the condition */
4778         mature_immBlock(header_block);
4779         set_cur_block(header_block);
4780
4781         create_condition_evaluation(statement->condition, body_block, false_block);
4782         mature_immBlock(body_block);
4783         mature_immBlock(false_block);
4784
4785         set_cur_block(false_block);
4786         return NULL;
4787 }
4788
4789 static ir_node *for_statement_to_firm(for_statement_t *statement)
4790 {
4791         create_local_declarations(statement->scope.entities);
4792
4793         if (currently_reachable()) {
4794                 entity_t *entity = statement->scope.entities;
4795                 for ( ; entity != NULL; entity = entity->base.next) {
4796                         if (!is_declaration(entity))
4797                                 continue;
4798
4799                         initialize_local_declaration(entity);
4800                 }
4801
4802                 if (statement->initialisation != NULL) {
4803                         expression_to_firm(statement->initialisation);
4804                 }
4805         }
4806
4807         /* Create the header block */
4808         ir_node *const header_block = new_immBlock();
4809         jump_to(header_block);
4810
4811         /* Create the condition. */
4812         ir_node *body_block;
4813         ir_node *false_block;
4814         if (statement->condition != NULL) {
4815                 body_block  = new_immBlock();
4816                 false_block = new_immBlock();
4817
4818                 set_cur_block(header_block);
4819                 create_condition_evaluation(statement->condition, body_block, false_block);
4820                 mature_immBlock(body_block);
4821         } else {
4822                 /* for-ever. */
4823                 body_block  = header_block;
4824                 false_block = NULL;
4825
4826                 keep_alive(header_block);
4827                 keep_all_memory(header_block);
4828         }
4829
4830         /* Create the step block, if necessary. */
4831         ir_node      *      step_block = header_block;
4832         expression_t *const step       = statement->step;
4833         if (step != NULL) {
4834                 step_block = new_immBlock();
4835         }
4836
4837         ir_node *const old_continue_label = continue_label;
4838         ir_node *const old_break_label    = break_label;
4839         continue_label = step_block;
4840         break_label    = false_block;
4841
4842         /* Create the loop body. */
4843         set_cur_block(body_block);
4844         statement_to_firm(statement->body);
4845         jump_if_reachable(step_block);
4846
4847         /* Create the step code. */
4848         if (step != NULL) {
4849                 mature_immBlock(step_block);
4850                 set_cur_block(step_block);
4851                 expression_to_firm(step);
4852                 jump_if_reachable(header_block);
4853         }
4854
4855         mature_immBlock(header_block);
4856         assert(false_block == NULL || false_block == break_label);
4857         false_block = break_label;
4858         if (false_block != NULL) {
4859                 mature_immBlock(false_block);
4860         }
4861         set_cur_block(false_block);
4862
4863         assert(continue_label == step_block);
4864         continue_label = old_continue_label;
4865         break_label    = old_break_label;
4866         return NULL;
4867 }
4868
4869 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4870 {
4871         if (!currently_reachable())
4872                 return NULL;
4873
4874         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4875         ir_node  *jump = new_d_Jmp(dbgi);
4876         add_immBlock_pred(target_block, jump);
4877
4878         set_unreachable_now();
4879         return NULL;
4880 }
4881
4882 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4883 {
4884         /* determine number of cases */
4885         size_t n_cases = 0;
4886         for (case_label_statement_t *l = statement->first_case; l != NULL;
4887              l = l->next) {
4888                 /* default case */
4889                 if (l->expression == NULL)
4890                         continue;
4891                 if (l->is_empty_range)
4892                         continue;
4893                 ++n_cases;
4894         }
4895
4896         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4897         size_t           i   = 0;
4898         for (case_label_statement_t *l = statement->first_case; l != NULL;
4899              l = l->next) {
4900             if (l->expression == NULL) {
4901                         l->pn = pn_Switch_default;
4902                         continue;
4903                 }
4904                 if (l->is_empty_range)
4905                         continue;
4906                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4907                 ir_tarval *max = min;
4908                 long       pn  = (long) i+1;
4909                 if (l->end_range != NULL)
4910                         max = fold_constant_to_tarval(l->end_range);
4911                 ir_switch_table_set(res, i++, min, max, pn);
4912                 l->pn = pn;
4913         }
4914         return res;
4915 }
4916
4917 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4918 {
4919         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4920         ir_node  *switch_node = NULL;
4921
4922         if (currently_reachable()) {
4923                 ir_node *expression = expression_to_firm(statement->expression);
4924                 ir_switch_table *table = create_switch_table(statement);
4925                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4926
4927                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4928         }
4929
4930         set_unreachable_now();
4931
4932         ir_node *const old_switch            = current_switch;
4933         ir_node *const old_break_label       = break_label;
4934         const bool     old_saw_default_label = saw_default_label;
4935         saw_default_label                    = false;
4936         current_switch                       = switch_node;
4937         break_label                          = NULL;
4938
4939         statement_to_firm(statement->body);
4940
4941         if (currently_reachable()) {
4942                 add_immBlock_pred(get_break_label(), new_Jmp());
4943         }
4944
4945         if (!saw_default_label && switch_node) {
4946                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4947                 add_immBlock_pred(get_break_label(), proj);
4948         }
4949
4950         if (break_label != NULL) {
4951                 mature_immBlock(break_label);
4952         }
4953         set_cur_block(break_label);
4954
4955         assert(current_switch == switch_node);
4956         current_switch    = old_switch;
4957         break_label       = old_break_label;
4958         saw_default_label = old_saw_default_label;
4959         return NULL;
4960 }
4961
4962 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4963 {
4964         if (statement->is_empty_range)
4965                 return NULL;
4966
4967         if (current_switch != NULL) {
4968                 ir_node *block = new_immBlock();
4969                 /* Fallthrough from previous case */
4970                 jump_if_reachable(block);
4971
4972                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4973                 add_immBlock_pred(block, proj);
4974                 if (statement->expression == NULL)
4975                         saw_default_label = true;
4976
4977                 mature_immBlock(block);
4978                 set_cur_block(block);
4979         }
4980
4981         return statement_to_firm(statement->statement);
4982 }
4983
4984 static ir_node *label_to_firm(const label_statement_t *statement)
4985 {
4986         ir_node *block = get_label_block(statement->label);
4987         jump_to(block);
4988
4989         set_cur_block(block);
4990         keep_alive(block);
4991         keep_all_memory(block);
4992
4993         return statement_to_firm(statement->statement);
4994 }
4995
4996 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4997 {
4998         if (!currently_reachable())
4999                 return NULL;
5000
5001         ir_node  *const irn  = expression_to_firm(statement->expression);
5002         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5003         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
5004
5005         set_irn_link(ijmp, ijmp_list);
5006         ijmp_list = ijmp;
5007
5008         set_unreachable_now();
5009         return NULL;
5010 }
5011
5012 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5013 {
5014         bool needs_memory = false;
5015
5016         if (statement->is_volatile) {
5017                 needs_memory = true;
5018         }
5019
5020         size_t         n_clobbers = 0;
5021         asm_clobber_t *clobber    = statement->clobbers;
5022         for ( ; clobber != NULL; clobber = clobber->next) {
5023                 const char *clobber_str = clobber->clobber.begin;
5024
5025                 if (!be_is_valid_clobber(clobber_str)) {
5026                         errorf(&statement->base.source_position,
5027                                    "invalid clobber '%s' specified", clobber->clobber);
5028                         continue;
5029                 }
5030
5031                 if (streq(clobber_str, "memory")) {
5032                         needs_memory = true;
5033                         continue;
5034                 }
5035
5036                 ident *id = new_id_from_str(clobber_str);
5037                 obstack_ptr_grow(&asm_obst, id);
5038                 ++n_clobbers;
5039         }
5040         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5041         ident **clobbers = NULL;
5042         if (n_clobbers > 0) {
5043                 clobbers = obstack_finish(&asm_obst);
5044         }
5045
5046         size_t n_inputs  = 0;
5047         asm_argument_t *argument = statement->inputs;
5048         for ( ; argument != NULL; argument = argument->next)
5049                 n_inputs++;
5050         size_t n_outputs = 0;
5051         argument = statement->outputs;
5052         for ( ; argument != NULL; argument = argument->next)
5053                 n_outputs++;
5054
5055         unsigned next_pos = 0;
5056
5057         ir_node *ins[n_inputs + n_outputs + 1];
5058         size_t   in_size = 0;
5059
5060         ir_asm_constraint tmp_in_constraints[n_outputs];
5061
5062         const expression_t *out_exprs[n_outputs];
5063         ir_node            *out_addrs[n_outputs];
5064         size_t              out_size = 0;
5065
5066         argument = statement->outputs;
5067         for ( ; argument != NULL; argument = argument->next) {
5068                 const char *constraints = argument->constraints.begin;
5069                 asm_constraint_flags_t asm_flags
5070                         = be_parse_asm_constraints(constraints);
5071
5072                 {
5073                         source_position_t const *const pos = &statement->base.source_position;
5074                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5075                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5076                         }
5077                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5078                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5079                                 continue;
5080                         }
5081                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5082                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5083                                 continue;
5084                         }
5085                 }
5086
5087                 unsigned pos = next_pos++;
5088                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5089                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5090                         expression_t *expr = argument->expression;
5091                         ir_node      *addr = expression_to_addr(expr);
5092                         /* in+output, construct an artifical same_as constraint on the
5093                          * input */
5094                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5095                                 char     buf[64];
5096                                 ir_node *value = get_value_from_lvalue(expr, addr);
5097
5098                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5099
5100                                 ir_asm_constraint constraint;
5101                                 constraint.pos              = pos;
5102                                 constraint.constraint       = new_id_from_str(buf);
5103                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5104                                 tmp_in_constraints[in_size] = constraint;
5105                                 ins[in_size] = value;
5106
5107                                 ++in_size;
5108                         }
5109
5110                         out_exprs[out_size] = expr;
5111                         out_addrs[out_size] = addr;
5112                         ++out_size;
5113                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5114                         /* pure memory ops need no input (but we have to make sure we
5115                          * attach to the memory) */
5116                         assert(! (asm_flags &
5117                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5118                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5119                         needs_memory = true;
5120
5121                         /* we need to attach the address to the inputs */
5122                         expression_t *expr = argument->expression;
5123
5124                         ir_asm_constraint constraint;
5125                         constraint.pos              = pos;
5126                         constraint.constraint       = new_id_from_str(constraints);
5127                         constraint.mode             = mode_M;
5128                         tmp_in_constraints[in_size] = constraint;
5129
5130                         ins[in_size]          = expression_to_addr(expr);
5131                         ++in_size;
5132                         continue;
5133                 } else {
5134                         errorf(&statement->base.source_position,
5135                                "only modifiers but no place set in constraints '%s'",
5136                                constraints);
5137                         continue;
5138                 }
5139
5140                 ir_asm_constraint constraint;
5141                 constraint.pos        = pos;
5142                 constraint.constraint = new_id_from_str(constraints);
5143                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5144
5145                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5146         }
5147         assert(obstack_object_size(&asm_obst)
5148                         == out_size * sizeof(ir_asm_constraint));
5149         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5150
5151
5152         obstack_grow(&asm_obst, tmp_in_constraints,
5153                      in_size * sizeof(tmp_in_constraints[0]));
5154         /* find and count input and output arguments */
5155         argument = statement->inputs;
5156         for ( ; argument != NULL; argument = argument->next) {
5157                 const char *constraints = argument->constraints.begin;
5158                 asm_constraint_flags_t asm_flags
5159                         = be_parse_asm_constraints(constraints);
5160
5161                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5162                         errorf(&statement->base.source_position,
5163                                "some constraints in '%s' are not supported", constraints);
5164                         continue;
5165                 }
5166                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5167                         errorf(&statement->base.source_position,
5168                                "some constraints in '%s' are invalid", constraints);
5169                         continue;
5170                 }
5171                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5172                         errorf(&statement->base.source_position,
5173                                "write flag specified for input constraints '%s'",
5174                                constraints);
5175                         continue;
5176                 }
5177
5178                 ir_node *input;
5179                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5180                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5181                         /* we can treat this as "normal" input */
5182                         input = expression_to_firm(argument->expression);
5183                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5184                         /* pure memory ops need no input (but we have to make sure we
5185                          * attach to the memory) */
5186                         assert(! (asm_flags &
5187                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5188                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5189                         needs_memory = true;
5190                         input = expression_to_addr(argument->expression);
5191                 } else {
5192                         errorf(&statement->base.source_position,
5193                                "only modifiers but no place set in constraints '%s'",
5194                                constraints);
5195                         continue;
5196                 }
5197
5198                 ir_asm_constraint constraint;
5199                 constraint.pos        = next_pos++;
5200                 constraint.constraint = new_id_from_str(constraints);
5201                 constraint.mode       = get_irn_mode(input);
5202
5203                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5204                 ins[in_size++] = input;
5205         }
5206
5207         if (needs_memory) {
5208                 ir_asm_constraint constraint;
5209                 constraint.pos        = next_pos++;
5210                 constraint.constraint = new_id_from_str("");
5211                 constraint.mode       = mode_M;
5212
5213                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5214                 ins[in_size++] = get_store();
5215         }
5216
5217         assert(obstack_object_size(&asm_obst)
5218                         == in_size * sizeof(ir_asm_constraint));
5219         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5220
5221         /* create asm node */
5222         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5223
5224         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5225
5226         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5227                                   out_size, output_constraints,
5228                                   n_clobbers, clobbers, asm_text);
5229
5230         if (statement->is_volatile) {
5231                 set_irn_pinned(node, op_pin_state_pinned);
5232         } else {
5233                 set_irn_pinned(node, op_pin_state_floats);
5234         }
5235
5236         /* create output projs & connect them */
5237         if (needs_memory) {
5238                 ir_node *projm = new_Proj(node, mode_M, out_size);
5239                 set_store(projm);
5240         }
5241
5242         size_t i;
5243         for (i = 0; i < out_size; ++i) {
5244                 const expression_t *out_expr = out_exprs[i];
5245                 long                pn       = i;
5246                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5247                 ir_node            *proj     = new_Proj(node, mode, pn);
5248                 ir_node            *addr     = out_addrs[i];
5249
5250                 set_value_for_expression_addr(out_expr, proj, addr);
5251         }
5252
5253         return NULL;
5254 }
5255
5256 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5257 {
5258         statement_to_firm(statement->try_statement);
5259         source_position_t const *const pos = &statement->base.source_position;
5260         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5261         return NULL;
5262 }
5263
5264 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5265 {
5266         errorf(&statement->base.source_position, "__leave not supported yet");
5267         return NULL;
5268 }
5269
5270 /**
5271  * Transform a statement.
5272  */
5273 static ir_node *statement_to_firm(statement_t *const stmt)
5274 {
5275 #ifndef NDEBUG
5276         assert(!stmt->base.transformed);
5277         stmt->base.transformed = true;
5278 #endif
5279
5280         switch (stmt->kind) {
5281         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5282         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5283         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5284         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5285         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5286         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5287         case STATEMENT_EMPTY:         return NULL; /* nothing */
5288         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5289         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5290         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5291         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5292         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5293         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5294         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5295         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5296         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5297
5298         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5299         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5300         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5301
5302         case STATEMENT_ERROR: panic("error statement found");
5303         }
5304         panic("statement not implemented");
5305 }
5306
5307 static int count_local_variables(const entity_t *entity,
5308                                  const entity_t *const last)
5309 {
5310         int count = 0;
5311         entity_t const *const end = last != NULL ? last->base.next : NULL;
5312         for (; entity != end; entity = entity->base.next) {
5313                 type_t *type;
5314                 bool    address_taken;
5315
5316                 if (entity->kind == ENTITY_VARIABLE) {
5317                         type          = skip_typeref(entity->declaration.type);
5318                         address_taken = entity->variable.address_taken;
5319                 } else if (entity->kind == ENTITY_PARAMETER) {
5320                         type          = skip_typeref(entity->declaration.type);
5321                         address_taken = entity->parameter.address_taken;
5322                 } else {
5323                         continue;
5324                 }
5325
5326                 if (!address_taken && is_type_scalar(type))
5327                         ++count;
5328         }
5329         return count;
5330 }
5331
5332 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5333 {
5334         int *const count = env;
5335
5336         switch (stmt->kind) {
5337         case STATEMENT_DECLARATION: {
5338                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5339                 *count += count_local_variables(decl_stmt->declarations_begin,
5340                                 decl_stmt->declarations_end);
5341                 break;
5342         }
5343
5344         case STATEMENT_FOR:
5345                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5346                 break;
5347
5348         default:
5349                 break;
5350         }
5351 }
5352
5353 /**
5354  * Return the number of local (alias free) variables used by a function.
5355  */
5356 static int get_function_n_local_vars(entity_t *entity)
5357 {
5358         const function_t *function = &entity->function;
5359         int count = 0;
5360
5361         /* count parameters */
5362         count += count_local_variables(function->parameters.entities, NULL);
5363
5364         /* count local variables declared in body */
5365         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5366         return count;
5367 }
5368
5369 /**
5370  * Build Firm code for the parameters of a function.
5371  */
5372 static void initialize_function_parameters(entity_t *entity)
5373 {
5374         assert(entity->kind == ENTITY_FUNCTION);
5375         ir_graph *irg             = current_ir_graph;
5376         ir_node  *args            = get_irg_args(irg);
5377         int       n               = 0;
5378         ir_type  *function_irtype;
5379
5380         if (entity->function.need_closure) {
5381                 /* add an extra parameter for the static link */
5382                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5383                 ++n;
5384
5385                 /* Matze: IMO this is wrong, nested functions should have an own
5386                  * type and not rely on strange parameters... */
5387                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5388         } else {
5389                 function_irtype = get_ir_type(entity->declaration.type);
5390         }
5391
5392
5393
5394         entity_t *parameter = entity->function.parameters.entities;
5395         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5396                 if (parameter->kind != ENTITY_PARAMETER)
5397                         continue;
5398
5399                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5400                 type_t *type = skip_typeref(parameter->declaration.type);
5401
5402                 bool needs_entity = parameter->parameter.address_taken;
5403                 assert(!is_type_array(type));
5404                 if (is_type_compound(type)) {
5405                         needs_entity = true;
5406                 }
5407
5408                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5409                 if (needs_entity) {
5410                         ir_type   *frame_type = get_irg_frame_type(irg);
5411                         ir_entity *param
5412                                 = new_parameter_entity(frame_type, n, param_irtype);
5413                         parameter->declaration.kind
5414                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5415                         parameter->parameter.v.entity = param;
5416                         continue;
5417                 }
5418
5419                 ir_mode *param_mode = get_type_mode(param_irtype);
5420                 long     pn         = n;
5421                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5422
5423                 ir_mode *mode = get_ir_mode_storage(type);
5424                 value = create_conv(NULL, value, mode);
5425                 value = do_strict_conv(NULL, value);
5426
5427                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5428                 parameter->parameter.v.value_number = next_value_number_function;
5429                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5430                                         parameter);
5431                 ++next_value_number_function;
5432
5433                 set_value(parameter->parameter.v.value_number, value);
5434         }
5435 }
5436
5437 /**
5438  * Handle additional decl modifiers for IR-graphs
5439  *
5440  * @param irg            the IR-graph
5441  * @param dec_modifiers  additional modifiers
5442  */
5443 static void handle_decl_modifier_irg(ir_graph *irg,
5444                                      decl_modifiers_t decl_modifiers)
5445 {
5446         if (decl_modifiers & DM_NAKED) {
5447                 /* TRUE if the declaration includes the Microsoft
5448                    __declspec(naked) specifier. */
5449                 add_irg_additional_properties(irg, mtp_property_naked);
5450         }
5451         if (decl_modifiers & DM_FORCEINLINE) {
5452                 /* TRUE if the declaration includes the
5453                    Microsoft __forceinline specifier. */
5454                 set_irg_inline_property(irg, irg_inline_forced);
5455         }
5456         if (decl_modifiers & DM_NOINLINE) {
5457                 /* TRUE if the declaration includes the Microsoft
5458                    __declspec(noinline) specifier. */
5459                 set_irg_inline_property(irg, irg_inline_forbidden);
5460         }
5461 }
5462
5463 static void add_function_pointer(ir_type *segment, ir_entity *method,
5464                                  const char *unique_template)
5465 {
5466         ir_type   *method_type  = get_entity_type(method);
5467         ir_type   *ptr_type     = new_type_pointer(method_type);
5468
5469         /* these entities don't really have a name but firm only allows
5470          * "" in ld_ident.
5471          * Note that we mustn't give these entities a name since for example
5472          * Mach-O doesn't allow them. */
5473         ident     *ide          = id_unique(unique_template);
5474         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5475         ir_graph  *irg          = get_const_code_irg();
5476         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5477                                                            method);
5478
5479         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5480         set_entity_compiler_generated(ptr, 1);
5481         set_entity_visibility(ptr, ir_visibility_private);
5482         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5483         set_atomic_ent_value(ptr, val);
5484 }
5485
5486 /**
5487  * Generate possible IJmp branches to a given label block.
5488  */
5489 static void gen_ijmp_branches(ir_node *block)
5490 {
5491         ir_node *ijmp;
5492         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5493                 add_immBlock_pred(block, ijmp);
5494         }
5495 }
5496
5497 /**
5498  * Create code for a function and all inner functions.
5499  *
5500  * @param entity  the function entity
5501  */
5502 static void create_function(entity_t *entity)
5503 {
5504         assert(entity->kind == ENTITY_FUNCTION);
5505         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5506
5507         if (entity->function.statement == NULL)
5508                 return;
5509
5510         inner_functions     = NULL;
5511         current_trampolines = NULL;
5512
5513         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5514                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5515                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5516         }
5517         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5518                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5519                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5520         }
5521
5522         current_function_entity = entity;
5523         current_function_name   = NULL;
5524         current_funcsig         = NULL;
5525
5526         assert(all_labels == NULL);
5527         all_labels = NEW_ARR_F(label_t *, 0);
5528         ijmp_list  = NULL;
5529
5530         int       n_local_vars = get_function_n_local_vars(entity);
5531         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5532         current_ir_graph = irg;
5533
5534         ir_graph *old_current_function = current_function;
5535         current_function = irg;
5536
5537         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5538         current_vararg_entity = NULL;
5539
5540         set_irg_fp_model(irg, firm_fp_model);
5541         tarval_enable_fp_ops(1);
5542         set_irn_dbg_info(get_irg_start_block(irg),
5543                          get_entity_dbg_info(function_entity));
5544
5545         /* set inline flags */
5546         if (entity->function.is_inline)
5547                 set_irg_inline_property(irg, irg_inline_recomended);
5548         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5549
5550         next_value_number_function = 0;
5551         initialize_function_parameters(entity);
5552         current_static_link = entity->function.static_link;
5553
5554         statement_to_firm(entity->function.statement);
5555
5556         ir_node *end_block = get_irg_end_block(irg);
5557
5558         /* do we have a return statement yet? */
5559         if (currently_reachable()) {
5560                 type_t *type = skip_typeref(entity->declaration.type);
5561                 assert(is_type_function(type));
5562                 type_t *const return_type = skip_typeref(type->function.return_type);
5563
5564                 ir_node *ret;
5565                 if (is_type_void(return_type)) {
5566                         ret = new_Return(get_store(), 0, NULL);
5567                 } else {
5568                         ir_mode *const mode = get_ir_mode_storage(return_type);
5569
5570                         ir_node *in[1];
5571                         /* §5.1.2.2.3 main implicitly returns 0 */
5572                         if (is_main(entity)) {
5573                                 in[0] = new_Const(get_mode_null(mode));
5574                         } else {
5575                                 in[0] = new_Unknown(mode);
5576                         }
5577                         ret = new_Return(get_store(), 1, in);
5578                 }
5579                 add_immBlock_pred(end_block, ret);
5580         }
5581
5582         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5583                 label_t *label = all_labels[i];
5584                 if (label->address_taken) {
5585                         gen_ijmp_branches(label->block);
5586                 }
5587                 mature_immBlock(label->block);
5588         }
5589
5590         DEL_ARR_F(all_labels);
5591         all_labels = NULL;
5592
5593         irg_finalize_cons(irg);
5594
5595         /* finalize the frame type */
5596         ir_type *frame_type = get_irg_frame_type(irg);
5597         int      n          = get_compound_n_members(frame_type);
5598         int      align_all  = 4;
5599         int      offset     = 0;
5600         for (int i = 0; i < n; ++i) {
5601                 ir_entity *member      = get_compound_member(frame_type, i);
5602                 ir_type   *entity_type = get_entity_type(member);
5603
5604                 int align = get_type_alignment_bytes(entity_type);
5605                 if (align > align_all)
5606                         align_all = align;
5607                 int misalign = 0;
5608                 if (align > 0) {
5609                         misalign  = offset % align;
5610                         if (misalign > 0) {
5611                                 offset += align - misalign;
5612                         }
5613                 }
5614
5615                 set_entity_offset(member, offset);
5616                 offset += get_type_size_bytes(entity_type);
5617         }
5618         set_type_size_bytes(frame_type, offset);
5619         set_type_alignment_bytes(frame_type, align_all);
5620
5621         irg_verify(irg, VERIFY_ENFORCE_SSA);
5622         current_vararg_entity = old_current_vararg_entity;
5623         current_function      = old_current_function;
5624
5625         if (current_trampolines != NULL) {
5626                 DEL_ARR_F(current_trampolines);
5627                 current_trampolines = NULL;
5628         }
5629
5630         /* create inner functions if any */
5631         entity_t **inner = inner_functions;
5632         if (inner != NULL) {
5633                 ir_type *rem_outer_frame      = current_outer_frame;
5634                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5635                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5636                         create_function(inner[i]);
5637                 }
5638                 DEL_ARR_F(inner);
5639
5640                 current_outer_frame      = rem_outer_frame;
5641         }
5642 }
5643
5644 static void scope_to_firm(scope_t *scope)
5645 {
5646         /* first pass: create declarations */
5647         entity_t *entity = scope->entities;
5648         for ( ; entity != NULL; entity = entity->base.next) {
5649                 if (entity->base.symbol == NULL)
5650                         continue;
5651
5652                 if (entity->kind == ENTITY_FUNCTION) {
5653                         if (entity->function.btk != BUILTIN_NONE) {
5654                                 /* builtins have no representation */
5655                                 continue;
5656                         }
5657                         (void)get_function_entity(entity, NULL);
5658                 } else if (entity->kind == ENTITY_VARIABLE) {
5659                         create_global_variable(entity);
5660                 } else if (entity->kind == ENTITY_NAMESPACE) {
5661                         scope_to_firm(&entity->namespacee.members);
5662                 }
5663         }
5664
5665         /* second pass: create code/initializers */
5666         entity = scope->entities;
5667         for ( ; entity != NULL; entity = entity->base.next) {
5668                 if (entity->base.symbol == NULL)
5669                         continue;
5670
5671                 if (entity->kind == ENTITY_FUNCTION) {
5672                         if (entity->function.btk != BUILTIN_NONE) {
5673                                 /* builtins have no representation */
5674                                 continue;
5675                         }
5676                         create_function(entity);
5677                 } else if (entity->kind == ENTITY_VARIABLE) {
5678                         assert(entity->declaration.kind
5679                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5680                         current_ir_graph = get_const_code_irg();
5681                         create_variable_initializer(entity);
5682                 }
5683         }
5684 }
5685
5686 void init_ast2firm(void)
5687 {
5688         obstack_init(&asm_obst);
5689         init_atomic_modes();
5690
5691         ir_set_debug_retrieve(dbg_retrieve);
5692         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5693
5694         /* create idents for all known runtime functions */
5695         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5696                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5697         }
5698
5699         entitymap_init(&entitymap);
5700 }
5701
5702 static void init_ir_types(void)
5703 {
5704         static int ir_types_initialized = 0;
5705         if (ir_types_initialized)
5706                 return;
5707         ir_types_initialized = 1;
5708
5709         ir_type_char       = get_ir_type(type_char);
5710         ir_type_const_char = get_ir_type(type_const_char);
5711         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5712
5713         be_params             = be_get_backend_param();
5714         mode_float_arithmetic = be_params->mode_float_arithmetic;
5715
5716         stack_param_align     = be_params->stack_param_align;
5717 }
5718
5719 void exit_ast2firm(void)
5720 {
5721         entitymap_destroy(&entitymap);
5722         obstack_free(&asm_obst, NULL);
5723 }
5724
5725 static void global_asm_to_firm(statement_t *s)
5726 {
5727         for (; s != NULL; s = s->base.next) {
5728                 assert(s->kind == STATEMENT_ASM);
5729
5730                 char const *const text = s->asms.asm_text.begin;
5731                 size_t            size = s->asms.asm_text.size;
5732
5733                 /* skip the last \0 */
5734                 if (text[size - 1] == '\0')
5735                         --size;
5736
5737                 ident *const id = new_id_from_chars(text, size);
5738                 add_irp_asm(id);
5739         }
5740 }
5741
5742 static const char *get_cwd(void)
5743 {
5744         static char buf[1024];
5745         if (buf[0] == '\0')
5746                 getcwd(buf, sizeof(buf));
5747         return buf;
5748 }
5749
5750 void translation_unit_to_firm(translation_unit_t *unit)
5751 {
5752         if (c_mode & _CXX) {
5753                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5754         } else if (c_mode & _C99) {
5755                 be_dwarf_set_source_language(DW_LANG_C99);
5756         } else if (c_mode & _C89) {
5757                 be_dwarf_set_source_language(DW_LANG_C89);
5758         } else {
5759                 be_dwarf_set_source_language(DW_LANG_C);
5760         }
5761         be_dwarf_set_compilation_directory(get_cwd());
5762
5763         /* initialize firm arithmetic */
5764         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5765         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5766
5767         /* just to be sure */
5768         continue_label           = NULL;
5769         break_label              = NULL;
5770         current_switch           = NULL;
5771         current_translation_unit = unit;
5772
5773         init_ir_types();
5774
5775         scope_to_firm(&unit->scope);
5776         global_asm_to_firm(unit->global_asm);
5777
5778         current_ir_graph         = NULL;
5779         current_translation_unit = NULL;
5780 }