nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "symbol_t.h"
  39 #include "token_t.h"
  40 #include "type_t.h"
  41 #include "ast_t.h"
  42 #include "entity_t.h"
  43 #include "parser.h"
  44 #include "diagnostic.h"
  45 #include "lang_features.h"
  46 #include "types.h"
  47 #include "type_hash.h"
  48 #include "mangle.h"
  49 #include "walk.h"
  50 #include "warning.h"
  51 #include "printer.h"
  52 #include "entitymap_t.h"
  53 #include "driver/firm_opt.h"
  54
  55 typedef struct trampoline_region trampoline_region;
  56 struct trampoline_region {
  57         ir_entity        *function;    /**< The function that is called by this trampoline */
  58         ir_entity        *region;      /**< created region for the trampoline */
  59 };
  60
  61 fp_model_t firm_fp_model = fp_model_precise;
  62
  63 static const backend_params *be_params;
  64
  65 static ir_type *ir_type_char;
  66 static ir_type *ir_type_const_char;
  67 static ir_type *ir_type_wchar_t;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int        next_value_number_function;
  76 static ir_node   *continue_label;
  77 static ir_node   *break_label;
  78 static ir_node   *current_switch;
  79 static bool       saw_default_label;
  80 static label_t  **all_labels;
  81 static entity_t **inner_functions;
  82 static ir_node   *ijmp_list;
  83 static bool       constant_folding;
  84
  85 static const entity_t     *current_function_entity;
  86 static ir_node            *current_function_name;
  87 static ir_node            *current_funcsig;
  88 static ir_graph           *current_function;
  89 static translation_unit_t *current_translation_unit;
  90 static trampoline_region  *current_trampolines;
  91 static ir_type            *current_outer_frame;
  92 static ir_node            *current_static_link;
  93 static ir_entity          *current_vararg_entity;
  94
  95 static entitymap_t  entitymap;
  96
  97 static struct obstack asm_obst;
  98
  99 typedef enum declaration_kind_t {
 100         DECLARATION_KIND_UNKNOWN,
 101         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 102         DECLARATION_KIND_GLOBAL_VARIABLE,
 103         DECLARATION_KIND_LOCAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 105         DECLARATION_KIND_PARAMETER,
 106         DECLARATION_KIND_PARAMETER_ENTITY,
 107         DECLARATION_KIND_FUNCTION,
 108         DECLARATION_KIND_COMPOUND_MEMBER,
 109         DECLARATION_KIND_INNER_FUNCTION
 110 } declaration_kind_t;
 111
 112 static ir_type *get_ir_type_incomplete(type_t *type);
 113
 114 static void enqueue_inner_function(entity_t *entity)
 115 {
 116         if (inner_functions == NULL)
 117                 inner_functions = NEW_ARR_F(entity_t *, 0);
 118         ARR_APP1(entity_t*, inner_functions, entity);
 119 }
 120
 121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 122 {
 123         const entity_t *entity = get_irg_loc_description(irg, pos);
 124
 125         if (entity != NULL) {
 126                 source_position_t const *const pos = &entity->base.source_position;
 127                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 128         }
 129         return new_r_Unknown(irg, mode);
 130 }
 131
 132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 133 {
 134         source_position_t const *const pos = (source_position_t const*)dbg;
 135         if (pos) {
 136                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 137         } else {
 138                 return (src_loc_t){ NULL, 0, 0 };
 139         }
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 148                                     const type_dbg_info *dbg)
 149 {
 150         assert(dbg != NULL);
 151         print_to_buffer(buffer, buffer_size);
 152         const type_t *type = (const type_t*) dbg;
 153         print_type(type);
 154         finish_print_to_buffer();
 155 }
 156
 157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 158 {
 159         return (type_dbg_info*) type;
 160 }
 161
 162 /* is the current block a reachable one? */
 163 static bool currently_reachable(void)
 164 {
 165         ir_node *const block = get_cur_block();
 166         return block != NULL && !is_Bad(block);
 167 }
 168
 169 static void set_unreachable_now(void)
 170 {
 171         set_cur_block(NULL);
 172 }
 173
 174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 175
 176 static ir_node *_expression_to_firm(const expression_t *expression);
 177 static ir_node *expression_to_firm(const expression_t *expression);
 178
 179 static unsigned decide_modulo_shift(unsigned type_size)
 180 {
 181         if (architecture_modulo_shift == 0)
 182                 return 0;
 183         if (type_size < architecture_modulo_shift)
 184                 return architecture_modulo_shift;
 185         return type_size;
 186 }
 187
 188 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 189 {
 190         unsigned flags = get_atomic_type_flags(kind);
 191         unsigned size  = get_atomic_type_size(kind);
 192         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 193             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 194                 if (size == 4) {
 195                         return get_modeF();
 196                 } else if (size == 8) {
 197                         return get_modeD();
 198                 } else {
 199                         panic("unexpected kind");
 200                 }
 201         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 202                 char            name[64];
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 206
 207                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 208                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 209                                     modulo_shift);
 210         }
 211
 212         return NULL;
 213 }
 214
 215 /**
 216  * Initialises the atomic modes depending on the machine size.
 217  */
 218 static void init_atomic_modes(void)
 219 {
 220         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 221         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 222                 if (atomic_modes[i] != NULL)
 223                         continue;
 224                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 225         }
 226 }
 227
 228 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 229 {
 230         assert(kind <= ATOMIC_TYPE_LAST);
 231         return atomic_modes[kind];
 232 }
 233
 234 static ir_node *get_vla_size(array_type_t *const type)
 235 {
 236         ir_node *size_node = type->size_node;
 237         if (size_node == NULL) {
 238                 size_node = expression_to_firm(type->size_expression);
 239                 type->size_node = size_node;
 240         }
 241         return size_node;
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256 /**
 257  * Creates a Firm type for an atomic type
 258  */
 259 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 260 {
 261         ir_mode        *mode      = atomic_modes[akind];
 262         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 263         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 264         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 265
 266         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 267         set_type_alignment_bytes(irtype, alignment);
 268
 269         return irtype;
 270 }
 271
 272 /**
 273  * Creates a Firm type for a complex type
 274  */
 275 static ir_type *create_complex_type(const atomic_type_t *type)
 276 {
 277         atomic_type_kind_t  kind = type->akind;
 278         ir_mode            *mode = atomic_modes[kind];
 279         ident              *id   = get_mode_ident(mode);
 280
 281         (void) id;
 282
 283         /* FIXME: finish the array */
 284         return NULL;
 285 }
 286
 287 /**
 288  * Creates a Firm type for an imaginary type
 289  */
 290 static ir_type *create_imaginary_type(const atomic_type_t *type)
 291 {
 292         return create_atomic_type(type->akind, (const type_t*)type);
 293 }
 294
 295 /**
 296  * return type of a parameter (and take transparent union gnu extension into
 297  * account)
 298  */
 299 static type_t *get_parameter_type(type_t *orig_type)
 300 {
 301         type_t *type = skip_typeref(orig_type);
 302         if (is_type_union(type)
 303                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 304                 compound_t *compound = type->compound.compound;
 305                 type                 = compound->members.entities->declaration.type;
 306         }
 307
 308         return type;
 309 }
 310
 311 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 312 {
 313         type_t        *return_type  = skip_typeref(function_type->return_type);
 314
 315         int            n_parameters = count_parameters(function_type)
 316                                        + (for_closure ? 1 : 0);
 317         int            n_results    = is_type_void(return_type) ? 0 : 1;
 318         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 319         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 320
 321         if (!is_type_void(return_type)) {
 322                 ir_type *restype = get_ir_type(return_type);
 323                 set_method_res_type(irtype, 0, restype);
 324         }
 325
 326         function_parameter_t *parameter = function_type->parameters;
 327         int                   n         = 0;
 328         if (for_closure) {
 329                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 330                 set_method_param_type(irtype, n, p_irtype);
 331                 ++n;
 332         }
 333         for ( ; parameter != NULL; parameter = parameter->next) {
 334                 type_t  *type     = get_parameter_type(parameter->type);
 335                 ir_type *p_irtype = get_ir_type(type);
 336                 set_method_param_type(irtype, n, p_irtype);
 337                 ++n;
 338         }
 339
 340         bool is_variadic = function_type->variadic;
 341
 342         if (is_variadic)
 343                 set_method_variadicity(irtype, variadicity_variadic);
 344
 345         unsigned cc = get_method_calling_convention(irtype);
 346         switch (function_type->calling_convention) {
 347         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 348         case CC_CDECL:
 349 is_cdecl:
 350                 set_method_calling_convention(irtype, SET_CDECL(cc));
 351                 break;
 352
 353         case CC_STDCALL:
 354                 if (is_variadic)
 355                         goto is_cdecl;
 356
 357                 /* only non-variadic function can use stdcall, else use cdecl */
 358                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 359                 break;
 360
 361         case CC_FASTCALL:
 362                 if (is_variadic)
 363                         goto is_cdecl;
 364                 /* only non-variadic function can use fastcall, else use cdecl */
 365                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 366                 break;
 367
 368         case CC_THISCALL:
 369                 /* Hmm, leave default, not accepted by the parser yet. */
 370                 break;
 371         }
 372
 373         if (for_closure)
 374                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 375
 376         const decl_modifiers_t modifiers = function_type->modifiers;
 377         if (modifiers & DM_CONST)
 378                 add_method_additional_properties(irtype, mtp_property_const);
 379         if (modifiers & DM_PURE)
 380                 add_method_additional_properties(irtype, mtp_property_pure);
 381         if (modifiers & DM_RETURNS_TWICE)
 382                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 383         if (modifiers & DM_NORETURN)
 384                 add_method_additional_properties(irtype, mtp_property_noreturn);
 385         if (modifiers & DM_NOTHROW)
 386                 add_method_additional_properties(irtype, mtp_property_nothrow);
 387         if (modifiers & DM_MALLOC)
 388                 add_method_additional_properties(irtype, mtp_property_malloc);
 389
 390         return irtype;
 391 }
 392
 393 static ir_type *create_pointer_type(pointer_type_t *type)
 394 {
 395         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 396         type_t        *points_to    = type->points_to;
 397         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 398         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 399
 400         return irtype;
 401 }
 402
 403 static ir_type *create_reference_type(reference_type_t *type)
 404 {
 405         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 406         type_t        *refers_to    = type->refers_to;
 407         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 408         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 409
 410         return irtype;
 411 }
 412
 413 static ir_type *create_array_type(array_type_t *type)
 414 {
 415         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 416         type_t        *element_type    = type->element_type;
 417         ir_type       *ir_element_type = get_ir_type(element_type);
 418         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 419
 420         const int align = get_type_alignment_bytes(ir_element_type);
 421         set_type_alignment_bytes(irtype, align);
 422
 423         if (type->size_constant) {
 424                 int n_elements = type->size;
 425
 426                 set_array_bounds_int(irtype, 0, 0, n_elements);
 427
 428                 size_t elemsize = get_type_size_bytes(ir_element_type);
 429                 if (elemsize % align > 0) {
 430                         elemsize += align - (elemsize % align);
 431                 }
 432                 set_type_size_bytes(irtype, n_elements * elemsize);
 433         } else {
 434                 set_array_lower_bound_int(irtype, 0, 0);
 435         }
 436         set_type_state(irtype, layout_fixed);
 437
 438         return irtype;
 439 }
 440
 441 /**
 442  * Return the signed integer type of size bits.
 443  *
 444  * @param size   the size
 445  */
 446 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 447                                                  unsigned size,
 448                                                                                                  const type_t *type)
 449 {
 450         static ir_mode *s_modes[64 + 1] = {NULL, };
 451         ir_type *res;
 452         ir_mode *mode;
 453
 454         if (size <= 0 || size > 64)
 455                 return NULL;
 456
 457         mode = s_modes[size];
 458         if (mode == NULL) {
 459                 char name[32];
 460
 461                 snprintf(name, sizeof(name), "bf_I%u", size);
 462                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 463                 s_modes[size] = mode;
 464         }
 465
 466         type_dbg_info *dbgi = get_type_dbg_info_(type);
 467         res                 = new_d_type_primitive(mode, dbgi);
 468         set_primitive_base_type(res, base_tp);
 469
 470         return res;
 471 }
 472
 473 /**
 474  * Return the unsigned integer type of size bits.
 475  *
 476  * @param size   the size
 477  */
 478 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 479                                                    unsigned size,
 480                                                                                                    const type_t *type)
 481 {
 482         static ir_mode *u_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = u_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_U%u", size);
 494                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 495                 u_modes[size] = mode;
 496         }
 497
 498         type_dbg_info *dbgi = get_type_dbg_info_(type);
 499         res = new_d_type_primitive(mode, dbgi);
 500         set_primitive_base_type(res, base_tp);
 501
 502         return res;
 503 }
 504
 505 static ir_type *create_bitfield_type(const entity_t *entity)
 506 {
 507         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 508         type_t *base = skip_typeref(entity->declaration.type);
 509         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 510         ir_type *irbase = get_ir_type(base);
 511
 512         unsigned bit_size = entity->compound_member.bit_size;
 513
 514         assert(!is_type_float(base));
 515         if (is_type_signed(base)) {
 516                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 517         } else {
 518                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 519         }
 520 }
 521
 522 /**
 523  * Construct firm type from ast struct type.
 524  */
 525 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 526 {
 527         compound_t *compound = type->compound;
 528
 529         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 530                 return compound->irtype;
 531         }
 532
 533         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 534
 535         symbol_t *type_symbol = compound->base.symbol;
 536         ident    *id;
 537         if (type_symbol != NULL) {
 538                 id = new_id_from_str(type_symbol->string);
 539         } else {
 540                 if (is_union) {
 541                         id = id_unique("__anonymous_union.%u");
 542                 } else {
 543                         id = id_unique("__anonymous_struct.%u");
 544                 }
 545         }
 546
 547         ir_type *irtype;
 548         if (is_union) {
 549                 irtype = new_type_union(id);
 550         } else {
 551                 irtype = new_type_struct(id);
 552         }
 553
 554         compound->irtype_complete = false;
 555         compound->irtype          = irtype;
 556
 557         if (incomplete)
 558                 return irtype;
 559
 560         if (is_union) {
 561                 layout_union_type(type);
 562         } else {
 563                 layout_struct_type(type);
 564         }
 565
 566         compound->irtype_complete = true;
 567
 568         entity_t *entry = compound->members.entities;
 569         for ( ; entry != NULL; entry = entry->base.next) {
 570                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 571                         continue;
 572
 573                 symbol_t *symbol     = entry->base.symbol;
 574                 type_t   *entry_type = entry->declaration.type;
 575                 ident    *ident;
 576                 if (symbol == NULL) {
 577                         /* anonymous bitfield member, skip */
 578                         if (entry->compound_member.bitfield)
 579                                 continue;
 580                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 581                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 582                         ident = id_unique("anon.%u");
 583                 } else {
 584                         ident = new_id_from_str(symbol->string);
 585                 }
 586
 587                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 588
 589                 ir_type *entry_irtype;
 590                 if (entry->compound_member.bitfield) {
 591                         entry_irtype = create_bitfield_type(entry);
 592                 } else {
 593                         entry_irtype = get_ir_type(entry_type);
 594                 }
 595                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 596
 597                 set_entity_offset(entity, entry->compound_member.offset);
 598                 set_entity_offset_bits_remainder(entity,
 599                                                  entry->compound_member.bit_offset);
 600
 601                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 602                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 603                 entry->compound_member.entity = entity;
 604         }
 605
 606         set_type_alignment_bytes(irtype, compound->alignment);
 607         set_type_size_bytes(irtype, compound->size);
 608         set_type_state(irtype, layout_fixed);
 609
 610         return irtype;
 611 }
 612
 613 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 614
 615 static void determine_enum_values(enum_type_t *const type)
 616 {
 617         ir_mode   *const mode    = atomic_modes[type->base.akind];
 618         ir_tarval *const one     = get_mode_one(mode);
 619         ir_tarval *      tv_next = get_mode_null(mode);
 620
 621         enum_t   *enume = type->enume;
 622         entity_t *entry = enume->base.next;
 623         for (; entry != NULL; entry = entry->base.next) {
 624                 if (entry->kind != ENTITY_ENUM_VALUE)
 625                         break;
 626
 627                 expression_t *const init = entry->enum_value.value;
 628                 if (init != NULL) {
 629                         tv_next = fold_constant_to_tarval(init);
 630                 }
 631                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 632                 entry->enum_value.tv = tv_next;
 633                 tv_next = tarval_add(tv_next, one);
 634         }
 635 }
 636
 637 static ir_type *create_enum_type(enum_type_t *const type)
 638 {
 639         return create_atomic_type(type->base.akind, (const type_t*) type);
 640 }
 641
 642 static ir_type *get_ir_type_incomplete(type_t *type)
 643 {
 644         assert(type != NULL);
 645         type = skip_typeref(type);
 646
 647         if (type->base.firm_type != NULL) {
 648                 return type->base.firm_type;
 649         }
 650
 651         if (is_type_compound(type)) {
 652                 return create_compound_type(&type->compound, true);
 653         } else {
 654                 return get_ir_type(type);
 655         }
 656 }
 657
 658 ir_type *get_ir_type(type_t *type)
 659 {
 660         assert(type != NULL);
 661
 662         type = skip_typeref(type);
 663
 664         if (type->base.firm_type != NULL) {
 665                 return type->base.firm_type;
 666         }
 667
 668         ir_type *firm_type = NULL;
 669         switch (type->kind) {
 670         case TYPE_ATOMIC:
 671                 firm_type = create_atomic_type(type->atomic.akind, type);
 672                 break;
 673         case TYPE_COMPLEX:
 674                 firm_type = create_complex_type(&type->atomic);
 675                 break;
 676         case TYPE_IMAGINARY:
 677                 firm_type = create_imaginary_type(&type->atomic);
 678                 break;
 679         case TYPE_FUNCTION:
 680                 firm_type = create_method_type(&type->function, false);
 681                 break;
 682         case TYPE_POINTER:
 683                 firm_type = create_pointer_type(&type->pointer);
 684                 break;
 685         case TYPE_REFERENCE:
 686                 firm_type = create_reference_type(&type->reference);
 687                 break;
 688         case TYPE_ARRAY:
 689                 firm_type = create_array_type(&type->array);
 690                 break;
 691         case TYPE_COMPOUND_STRUCT:
 692         case TYPE_COMPOUND_UNION:
 693                 firm_type = create_compound_type(&type->compound, false);
 694                 break;
 695         case TYPE_ENUM:
 696                 firm_type = create_enum_type(&type->enumt);
 697                 break;
 698
 699         case TYPE_ERROR:
 700         case TYPE_TYPEOF:
 701         case TYPE_TYPEDEF:
 702                 break;
 703         }
 704         if (firm_type == NULL)
 705                 panic("unknown type found");
 706
 707         type->base.firm_type = firm_type;
 708         return firm_type;
 709 }
 710
 711 static ir_mode *get_ir_mode_storage(type_t *type)
 712 {
 713         type = skip_typeref(type);
 714
 715         /* Firm doesn't report a mode for arrays and structs/unions. */
 716         if (!is_type_scalar(type)) {
 717                 return mode_P_data;
 718         }
 719
 720         ir_type *const irtype = get_ir_type(type);
 721         ir_mode *const mode   = get_type_mode(irtype);
 722         assert(mode != NULL);
 723         return mode;
 724 }
 725
 726 /*
 727  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 728  * int that it returns bigger modes for floating point on some platforms
 729  * (x87 internally does arithemtic with 80bits)
 730  */
 731 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 732 {
 733         ir_mode *mode = get_ir_mode_storage(type);
 734         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 735                 return mode_float_arithmetic;
 736         }
 737
 738         return mode;
 739 }
 740
 741 /**
 742  * Return a node representing the size of a type.
 743  */
 744 static ir_node *get_type_size_node(type_t *type)
 745 {
 746         unsigned size;
 747         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 748         type = skip_typeref(type);
 749
 750         if (is_type_array(type) && type->array.is_vla) {
 751                 ir_node *size_node = get_vla_size(&type->array);
 752                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 753                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 754                 return real_size;
 755         }
 756
 757         size = get_type_size(type);
 758         return new_Const_long(mode, size);
 759 }
 760
 761 /** Names of the runtime functions. */
 762 static const struct {
 763         int        id;           /**< the rts id */
 764         int        n_res;        /**< number of return values */
 765         const char *name;        /**< the name of the rts function */
 766         int        n_params;     /**< number of parameters */
 767         unsigned   flags;        /**< language flags */
 768 } rts_data[] = {
 769         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 770         { rts_abort,      0, "abort",        0, _C89 },
 771         { rts_alloca,     1, "alloca",       1, _ALL },
 772         { rts_abs,        1, "abs",          1, _C89 },
 773         { rts_labs,       1, "labs",         1, _C89 },
 774         { rts_llabs,      1, "llabs",        1, _C99 },
 775         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 776
 777         { rts_fabs,       1, "fabs",         1, _C89 },
 778         { rts_sqrt,       1, "sqrt",         1, _C89 },
 779         { rts_cbrt,       1, "cbrt",         1, _C99 },
 780         { rts_exp,        1, "exp",          1, _C89 },
 781         { rts_exp2,       1, "exp2",         1, _C89 },
 782         { rts_exp10,      1, "exp10",        1, _GNUC },
 783         { rts_log,        1, "log",          1, _C89 },
 784         { rts_log2,       1, "log2",         1, _C89 },
 785         { rts_log10,      1, "log10",        1, _C89 },
 786         { rts_pow,        1, "pow",          2, _C89 },
 787         { rts_sin,        1, "sin",          1, _C89 },
 788         { rts_cos,        1, "cos",          1, _C89 },
 789         { rts_tan,        1, "tan",          1, _C89 },
 790         { rts_asin,       1, "asin",         1, _C89 },
 791         { rts_acos,       1, "acos",         1, _C89 },
 792         { rts_atan,       1, "atan",         1, _C89 },
 793         { rts_sinh,       1, "sinh",         1, _C89 },
 794         { rts_cosh,       1, "cosh",         1, _C89 },
 795         { rts_tanh,       1, "tanh",         1, _C89 },
 796
 797         { rts_fabsf,      1, "fabsf",        1, _C99 },
 798         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 799         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 800         { rts_expf,       1, "expf",         1, _C99 },
 801         { rts_exp2f,      1, "exp2f",        1, _C99 },
 802         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 803         { rts_logf,       1, "logf",         1, _C99 },
 804         { rts_log2f,      1, "log2f",        1, _C99 },
 805         { rts_log10f,     1, "log10f",       1, _C99 },
 806         { rts_powf,       1, "powf",         2, _C99 },
 807         { rts_sinf,       1, "sinf",         1, _C99 },
 808         { rts_cosf,       1, "cosf",         1, _C99 },
 809         { rts_tanf,       1, "tanf",         1, _C99 },
 810         { rts_asinf,      1, "asinf",        1, _C99 },
 811         { rts_acosf,      1, "acosf",        1, _C99 },
 812         { rts_atanf,      1, "atanf",        1, _C99 },
 813         { rts_sinhf,      1, "sinhf",        1, _C99 },
 814         { rts_coshf,      1, "coshf",        1, _C99 },
 815         { rts_tanhf,      1, "tanhf",        1, _C99 },
 816
 817         { rts_fabsl,      1, "fabsl",        1, _C99 },
 818         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 819         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 820         { rts_expl,       1, "expl",         1, _C99 },
 821         { rts_exp2l,      1, "exp2l",        1, _C99 },
 822         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 823         { rts_logl,       1, "logl",         1, _C99 },
 824         { rts_log2l,      1, "log2l",        1, _C99 },
 825         { rts_log10l,     1, "log10l",       1, _C99 },
 826         { rts_powl,       1, "powl",         2, _C99 },
 827         { rts_sinl,       1, "sinl",         1, _C99 },
 828         { rts_cosl,       1, "cosl",         1, _C99 },
 829         { rts_tanl,       1, "tanl",         1, _C99 },
 830         { rts_asinl,      1, "asinl",        1, _C99 },
 831         { rts_acosl,      1, "acosl",        1, _C99 },
 832         { rts_atanl,      1, "atanl",        1, _C99 },
 833         { rts_sinhl,      1, "sinhl",        1, _C99 },
 834         { rts_coshl,      1, "coshl",        1, _C99 },
 835         { rts_tanhl,      1, "tanhl",        1, _C99 },
 836
 837         { rts_strcmp,     1, "strcmp",       2, _C89 },
 838         { rts_strncmp,    1, "strncmp",      3, _C89 },
 839         { rts_strcpy,     1, "strcpy",       2, _C89 },
 840         { rts_strlen,     1, "strlen",       1, _C89 },
 841         { rts_memcpy,     1, "memcpy",       3, _C89 },
 842         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 843         { rts_memmove,    1, "memmove",      3, _C89 },
 844         { rts_memset,     1, "memset",       3, _C89 },
 845         { rts_memcmp,     1, "memcmp",       3, _C89 },
 846 };
 847
 848 static ident *rts_idents[lengthof(rts_data)];
 849
 850 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 851
 852 void set_create_ld_ident(ident *(*func)(entity_t*))
 853 {
 854         create_ld_ident = func;
 855 }
 856
 857 static bool declaration_is_definition(const entity_t *entity)
 858 {
 859         switch (entity->kind) {
 860         case ENTITY_VARIABLE:
 861                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 862         case ENTITY_FUNCTION:
 863                 return entity->function.statement != NULL;
 864         case ENTITY_PARAMETER:
 865         case ENTITY_COMPOUND_MEMBER:
 866                 return false;
 867         case ENTITY_TYPEDEF:
 868         case ENTITY_ENUM:
 869         case ENTITY_ENUM_VALUE:
 870         case ENTITY_NAMESPACE:
 871         case ENTITY_LABEL:
 872         case ENTITY_LOCAL_LABEL:
 873                 break;
 874         }
 875         panic("declaration_is_definition called on non-declaration");
 876 }
 877
 878 /**
 879  * Handle GNU attributes for entities
 880  *
 881  * @param ent   the entity
 882  * @param decl  the routine declaration
 883  */
 884 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 885 {
 886         assert(is_declaration(entity));
 887         decl_modifiers_t modifiers = entity->declaration.modifiers;
 888
 889         if (is_method_entity(irentity)) {
 890                 if (modifiers & DM_PURE) {
 891                         set_entity_additional_properties(irentity, mtp_property_pure);
 892                 }
 893                 if (modifiers & DM_CONST) {
 894                         add_entity_additional_properties(irentity, mtp_property_const);
 895                 }
 896         }
 897         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 898                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 899         }
 900         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 901             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 902                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 903         }
 904 }
 905
 906 static bool is_main(entity_t *entity)
 907 {
 908         static symbol_t *sym_main = NULL;
 909         if (sym_main == NULL) {
 910                 sym_main = symbol_table_insert("main");
 911         }
 912
 913         if (entity->base.symbol != sym_main)
 914                 return false;
 915         /* must be in outermost scope */
 916         if (entity->base.parent_scope != &current_translation_unit->scope)
 917                 return false;
 918
 919         return true;
 920 }
 921
 922 /**
 923  * Creates an entity representing a function.
 924  *
 925  * @param entity       the function declaration/definition
 926  * @param owner_type   the owner type of this function, NULL
 927  *                     for global functions
 928  */
 929 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 930 {
 931         assert(entity->kind == ENTITY_FUNCTION);
 932         if (entity->function.irentity != NULL)
 933                 return entity->function.irentity;
 934
 935         switch (entity->function.btk) {
 936         case BUILTIN_NONE:
 937         case BUILTIN_LIBC:
 938         case BUILTIN_LIBC_CHECK:
 939                 break;
 940         default:
 941                 return NULL;
 942         }
 943
 944         symbol_t *symbol = entity->base.symbol;
 945         ident    *id     = new_id_from_str(symbol->string);
 946
 947         /* already an entity defined? */
 948         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 949         bool const has_body = entity->function.statement != NULL;
 950         if (irentity != NULL) {
 951                 goto entity_created;
 952         }
 953
 954         ir_type *ir_type_method;
 955         if (entity->function.need_closure)
 956                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 957         else
 958                 ir_type_method = get_ir_type(entity->declaration.type);
 959
 960         bool nested_function = false;
 961         if (owner_type == NULL)
 962                 owner_type = get_glob_type();
 963         else
 964                 nested_function = true;
 965
 966         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 967         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 968
 969         ident *ld_id;
 970         if (nested_function)
 971                 ld_id = id_unique("inner.%u");
 972         else
 973                 ld_id = create_ld_ident(entity);
 974         set_entity_ld_ident(irentity, ld_id);
 975
 976         handle_decl_modifiers(irentity, entity);
 977
 978         if (! nested_function) {
 979                 storage_class_tag_t const storage_class
 980                         = (storage_class_tag_t) entity->declaration.storage_class;
 981                 if (storage_class == STORAGE_CLASS_STATIC) {
 982                     set_entity_visibility(irentity, ir_visibility_local);
 983                 } else {
 984                     set_entity_visibility(irentity, ir_visibility_external);
 985                 }
 986
 987                 bool const is_inline = entity->function.is_inline;
 988                 if (is_inline && has_body) {
 989                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
 990                             || ((c_mode & _C99) == 0
 991                                 && storage_class == STORAGE_CLASS_EXTERN)) {
 992                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
 993                         }
 994                 }
 995         } else {
 996                 /* nested functions are always local */
 997                 set_entity_visibility(irentity, ir_visibility_local);
 998         }
 999
1000         /* We should check for file scope here, but as long as we compile C only
1001            this is not needed. */
1002         if (!freestanding && !has_body) {
1003                 /* check for a known runtime function */
1004                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1005                         if (id != rts_idents[i])
1006                                 continue;
1007
1008                         function_type_t *function_type
1009                                 = &entity->declaration.type->function;
1010                         /* rts_entities code can't handle a "wrong" number of parameters */
1011                         if (function_type->unspecified_parameters)
1012                                 continue;
1013
1014                         /* check number of parameters */
1015                         int n_params = count_parameters(function_type);
1016                         if (n_params != rts_data[i].n_params)
1017                                 continue;
1018
1019                         type_t *return_type = skip_typeref(function_type->return_type);
1020                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1021                         if (n_res != rts_data[i].n_res)
1022                                 continue;
1023
1024                         /* ignore those rts functions not necessary needed for current mode */
1025                         if ((c_mode & rts_data[i].flags) == 0)
1026                                 continue;
1027                         assert(rts_entities[rts_data[i].id] == NULL);
1028                         rts_entities[rts_data[i].id] = irentity;
1029                 }
1030         }
1031
1032         entitymap_insert(&entitymap, symbol, irentity);
1033
1034 entity_created:
1035         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1036         entity->function.irentity = irentity;
1037
1038         return irentity;
1039 }
1040
1041 /**
1042  * Creates a SymConst for a given entity.
1043  *
1044  * @param dbgi    debug info
1045  * @param entity  the entity
1046  */
1047 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1048 {
1049         assert(entity != NULL);
1050         union symconst_symbol sym;
1051         sym.entity_p = entity;
1052         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1053 }
1054
1055 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1056 {
1057         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1058 }
1059
1060 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1061                                    ir_mode *dest_mode)
1062 {
1063         if (is_Const(value)) {
1064                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1065         }
1066
1067         ir_node *cond       = new_d_Cond(dbgi, value);
1068         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1069         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1070         ir_node *tblock     = new_Block(1, &proj_true);
1071         ir_node *fblock     = new_Block(1, &proj_false);
1072         set_cur_block(tblock);
1073         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1074         ir_node *tjump  = new_Jmp();
1075         set_cur_block(fblock);
1076         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1077         ir_node *fjump  = new_Jmp();
1078
1079         ir_node *in[2]      = { tjump, fjump };
1080         ir_node *mergeblock = new_Block(2, in);
1081         set_cur_block(mergeblock);
1082         ir_node *phi_in[2]  = { const1, const0 };
1083         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1084         return phi;
1085 }
1086
1087 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1088 {
1089         ir_mode *value_mode = get_irn_mode(value);
1090
1091         if (value_mode == dest_mode)
1092                 return value;
1093
1094         if (dest_mode == mode_b) {
1095                 ir_node *zero = new_Const(get_mode_null(value_mode));
1096                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1097                 return cmp;
1098         } else if (value_mode == mode_b) {
1099                 return create_conv_from_b(dbgi, value, dest_mode);
1100         }
1101
1102         return new_d_Conv(dbgi, value, dest_mode);
1103 }
1104
1105 /**
1106  * Creates a SymConst node representing a wide string literal.
1107  *
1108  * @param literal   the wide string literal
1109  */
1110 static ir_node *wide_string_literal_to_firm(
1111                 const string_literal_expression_t *literal)
1112 {
1113         ir_type  *const global_type = get_glob_type();
1114         ir_type  *const elem_type   = ir_type_wchar_t;
1115         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1116         ir_type  *const type        = new_type_array(1, elem_type);
1117
1118         ident     *const id     = id_unique("str.%u");
1119         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1120         set_entity_ld_ident(entity, id);
1121         set_entity_visibility(entity, ir_visibility_private);
1122         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1123
1124         ir_mode      *const mode = get_type_mode(elem_type);
1125         const size_t        slen = wstrlen(&literal->value);
1126
1127         set_array_lower_bound_int(type, 0, 0);
1128         set_array_upper_bound_int(type, 0, slen);
1129         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1130         set_type_state(type, layout_fixed);
1131
1132         ir_initializer_t *initializer = create_initializer_compound(slen);
1133         const char              *p    = literal->value.begin;
1134         for (size_t i = 0; i < slen; ++i) {
1135                 assert(p < literal->value.begin + literal->value.size);
1136                 utf32             v   = read_utf8_char(&p);
1137                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1138                 ir_initializer_t *val = create_initializer_tarval(tv);
1139                 set_initializer_compound_value(initializer, i, val);
1140         }
1141         set_entity_initializer(entity, initializer);
1142
1143         return create_symconst(dbgi, entity);
1144 }
1145
1146 /**
1147  * Creates a SymConst node representing a string constant.
1148  *
1149  * @param src_pos    the source position of the string constant
1150  * @param id_prefix  a prefix for the name of the generated string constant
1151  * @param value      the value of the string constant
1152  */
1153 static ir_node *string_to_firm(const source_position_t *const src_pos,
1154                                const char *const id_prefix,
1155                                const string_t *const value)
1156 {
1157         ir_type  *const global_type = get_glob_type();
1158         dbg_info *const dbgi        = get_dbg_info(src_pos);
1159         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1160
1161         ident     *const id     = id_unique(id_prefix);
1162         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1163         set_entity_ld_ident(entity, id);
1164         set_entity_visibility(entity, ir_visibility_private);
1165         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1166
1167         ir_type *const elem_type = ir_type_const_char;
1168         ir_mode *const mode      = get_type_mode(elem_type);
1169
1170         const char* const string = value->begin;
1171         const size_t      slen   = value->size;
1172
1173         set_array_lower_bound_int(type, 0, 0);
1174         set_array_upper_bound_int(type, 0, slen);
1175         set_type_size_bytes(type, slen);
1176         set_type_state(type, layout_fixed);
1177
1178         ir_initializer_t *initializer = create_initializer_compound(slen);
1179         for (size_t i = 0; i < slen; ++i) {
1180                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1181                 ir_initializer_t *val = create_initializer_tarval(tv);
1182                 set_initializer_compound_value(initializer, i, val);
1183         }
1184         set_entity_initializer(entity, initializer);
1185
1186         return create_symconst(dbgi, entity);
1187 }
1188
1189 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1190 {
1191         const char *string = literal->value.begin;
1192         size_t      size   = literal->value.size;
1193
1194         assert(type->kind == TYPE_ATOMIC);
1195         atomic_type_kind_t akind = type->atomic.akind;
1196
1197         ir_mode   *const mode = atomic_modes[akind];
1198         ir_tarval *const tv   = new_tarval_from_str(string, size, mode);
1199         if (tv == tarval_bad)
1200                 return false;
1201
1202         literal->base.type    = type;
1203         literal->target_value = tv;
1204         return true;
1205 }
1206
1207 static void create_integer_tarval(literal_expression_t *literal)
1208 {
1209         /* -1: signed only, 0: any, 1: unsigned only */
1210         int             sign   = literal->value.begin[0] != '0' /* decimal */ ? -1 : 0;
1211         unsigned        ls     = 0;
1212         const string_t *suffix = &literal->suffix;
1213         /* parse suffix */
1214         if (suffix->size > 0) {
1215                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1216                         if (*c == 'u' || *c == 'U') sign = 1;
1217                         if (*c == 'l' || *c == 'L') { ++ls; }
1218                 }
1219         }
1220
1221         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1222
1223         /* now try if the constant is small enough for some types */
1224         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1225         if (ls < 1) {
1226                 if (sign <= 0 && try_create_integer(literal, type_int))
1227                         goto finished;
1228                 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1229                         goto finished;
1230         }
1231         if (ls < 2) {
1232                 if (sign <= 0 && try_create_integer(literal, type_long))
1233                         goto finished;
1234                 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1235                         goto finished;
1236         }
1237         /* last try? then we should not report tarval_bad */
1238         if (sign < 0)
1239                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1240         if (sign <= 0 && try_create_integer(literal, type_long_long))
1241                 goto finished;
1242
1243         /* last try */
1244         assert(sign >= 0);
1245         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246         bool res = try_create_integer(literal, type_unsigned_long_long);
1247         if (!res)
1248                 panic("internal error when parsing number literal");
1249
1250 finished:
1251         tarval_set_integer_overflow_mode(old_mode);
1252 }
1253
1254 void determine_literal_type(literal_expression_t *literal)
1255 {
1256         switch (literal->base.kind) {
1257         case EXPR_LITERAL_INTEGER:
1258                 create_integer_tarval(literal);
1259                 return;
1260         default:
1261                 break;
1262         }
1263 }
1264
1265 /**
1266  * Creates a Const node representing a constant.
1267  */
1268 static ir_node *literal_to_firm(const literal_expression_t *literal)
1269 {
1270         type_t     *type   = skip_typeref(literal->base.type);
1271         ir_mode    *mode   = get_ir_mode_storage(type);
1272         const char *string = literal->value.begin;
1273         size_t      size   = literal->value.size;
1274         ir_tarval  *tv;
1275
1276         switch (literal->base.kind) {
1277         case EXPR_LITERAL_WIDE_CHARACTER: {
1278                 utf32  v = read_utf8_char(&string);
1279                 char   buf[128];
1280                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1281
1282                 tv = new_tarval_from_str(buf, len, mode);
1283                 break;
1284         }
1285
1286         case EXPR_LITERAL_CHARACTER: {
1287                 long long int v;
1288                 bool char_is_signed
1289                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1290                 if (size == 1 && char_is_signed) {
1291                         v = (signed char)string[0];
1292                 } else {
1293                         v = 0;
1294                         for (size_t i = 0; i < size; ++i) {
1295                                 v = (v << 8) | ((unsigned char)string[i]);
1296                         }
1297                 }
1298                 char   buf[128];
1299                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1300
1301                 tv = new_tarval_from_str(buf, len, mode);
1302                 break;
1303         }
1304
1305         case EXPR_LITERAL_INTEGER:
1306                 assert(literal->target_value != NULL);
1307                 tv = literal->target_value;
1308                 break;
1309
1310         case EXPR_LITERAL_FLOATINGPOINT:
1311                 tv = new_tarval_from_str(string, size, mode);
1312                 break;
1313
1314         case EXPR_LITERAL_BOOLEAN:
1315                 if (string[0] == 't') {
1316                         tv = get_mode_one(mode);
1317                 } else {
1318                         assert(string[0] == 'f');
1319         case EXPR_LITERAL_MS_NOOP:
1320                         tv = get_mode_null(mode);
1321                 }
1322                 break;
1323
1324         default:
1325                 panic("Invalid literal kind found");
1326         }
1327
1328         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1329         ir_node  *res        = new_d_Const(dbgi, tv);
1330         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1331         return create_conv(dbgi, res, mode_arith);
1332 }
1333
1334 /*
1335  * Allocate an area of size bytes aligned at alignment
1336  * at a frame type.
1337  */
1338 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1339 {
1340         static unsigned area_cnt = 0;
1341         char buf[32];
1342
1343         ir_type *tp = new_type_array(1, ir_type_char);
1344         set_array_bounds_int(tp, 0, 0, size);
1345         set_type_alignment_bytes(tp, alignment);
1346
1347         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1348         ident *name = new_id_from_str(buf);
1349         ir_entity *area = new_entity(frame_type, name, tp);
1350
1351         /* mark this entity as compiler generated */
1352         set_entity_compiler_generated(area, 1);
1353         return area;
1354 }
1355
1356 /**
1357  * Return a node representing a trampoline region
1358  * for a given function entity.
1359  *
1360  * @param dbgi    debug info
1361  * @param entity  the function entity
1362  */
1363 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1364 {
1365         ir_entity *region = NULL;
1366         int        i;
1367
1368         if (current_trampolines != NULL) {
1369                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1370                         if (current_trampolines[i].function == entity) {
1371                                 region = current_trampolines[i].region;
1372                                 break;
1373                         }
1374                 }
1375         } else {
1376                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1377         }
1378         ir_graph *irg = current_ir_graph;
1379         if (region == NULL) {
1380                 /* create a new region */
1381                 ir_type           *frame_tp = get_irg_frame_type(irg);
1382                 trampoline_region  reg;
1383                 reg.function = entity;
1384
1385                 reg.region   = alloc_trampoline(frame_tp,
1386                                                 be_params->trampoline_size,
1387                                                 be_params->trampoline_align);
1388                 ARR_APP1(trampoline_region, current_trampolines, reg);
1389                 region = reg.region;
1390         }
1391         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1392                                region);
1393 }
1394
1395 /**
1396  * Creates a trampoline for a function represented by an entity.
1397  *
1398  * @param dbgi    debug info
1399  * @param mode    the (reference) mode for the function address
1400  * @param entity  the function entity
1401  */
1402 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1403                                   ir_entity *entity)
1404 {
1405         assert(entity != NULL);
1406         ir_node *in[3];
1407         in[0] = get_trampoline_region(dbgi, entity);
1408         in[1] = create_symconst(dbgi, entity);
1409         in[2] = get_irg_frame(current_ir_graph);
1410
1411         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1412         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1413         return new_Proj(irn, mode, pn_Builtin_max+1);
1414 }
1415
1416 /**
1417  * Dereference an address.
1418  *
1419  * @param dbgi  debug info
1420  * @param type  the type of the dereferenced result (the points_to type)
1421  * @param addr  the address to dereference
1422  */
1423 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1424                                       ir_node *const addr)
1425 {
1426         type_t *skipped = skip_typeref(type);
1427         if (is_type_incomplete(skipped))
1428                 return addr;
1429
1430         ir_type *irtype = get_ir_type(skipped);
1431         if (is_compound_type(irtype)
1432             || is_Method_type(irtype)
1433             || is_Array_type(irtype)) {
1434                 return addr;
1435         }
1436
1437         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1438                                   ? cons_volatile : cons_none;
1439         ir_mode *const mode     = get_type_mode(irtype);
1440         ir_node *const memory   = get_store();
1441         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1442         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1443         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1444
1445         set_store(load_mem);
1446
1447         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1448         return create_conv(dbgi, load_res, mode_arithmetic);
1449 }
1450
1451 /**
1452  * Creates a strict Conv (to the node's mode) if necessary.
1453  *
1454  * @param dbgi  debug info
1455  * @param node  the node to strict conv
1456  */
1457 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1458 {
1459         ir_mode *mode = get_irn_mode(node);
1460
1461         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1462                 return node;
1463         if (!mode_is_float(mode))
1464                 return node;
1465
1466         /* check if there is already a Conv */
1467         if (is_Conv(node)) {
1468                 /* convert it into a strict Conv */
1469                 set_Conv_strict(node, 1);
1470                 return node;
1471         }
1472
1473         /* otherwise create a new one */
1474         return new_d_strictConv(dbgi, node, mode);
1475 }
1476
1477 /**
1478  * Returns the correct base address depending on whether it is a parameter or a
1479  * normal local variable.
1480  */
1481 static ir_node *get_local_frame(ir_entity *const ent)
1482 {
1483         ir_graph      *const irg   = current_ir_graph;
1484         const ir_type *const owner = get_entity_owner(ent);
1485         if (owner == current_outer_frame) {
1486                 assert(current_static_link != NULL);
1487                 return current_static_link;
1488         } else {
1489                 return get_irg_frame(irg);
1490         }
1491 }
1492
1493 /**
1494  * Keep all memory edges of the given block.
1495  */
1496 static void keep_all_memory(ir_node *block)
1497 {
1498         ir_node *old = get_cur_block();
1499
1500         set_cur_block(block);
1501         keep_alive(get_store());
1502         /* TODO: keep all memory edges from restricted pointers */
1503         set_cur_block(old);
1504 }
1505
1506 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1507 {
1508         entity_t *entity = ref->entity;
1509         if (entity->enum_value.tv == NULL) {
1510                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1511                 assert(type->kind == TYPE_ENUM);
1512                 determine_enum_values(&type->enumt);
1513         }
1514
1515         return new_Const(entity->enum_value.tv);
1516 }
1517
1518 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1519 {
1520         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1521         entity_t *entity = ref->entity;
1522         assert(is_declaration(entity));
1523         type_t   *type   = skip_typeref(entity->declaration.type);
1524
1525         /* make sure the type is constructed */
1526         (void) get_ir_type(type);
1527
1528         if (entity->kind == ENTITY_FUNCTION
1529             && entity->function.btk != BUILTIN_NONE) {
1530                 ir_entity *irentity = get_function_entity(entity, NULL);
1531                 /* for gcc compatibility we have to produce (dummy) addresses for some
1532                  * builtins which don't have entities */
1533                 if (irentity == NULL) {
1534                         source_position_t const *const pos = &ref->base.source_position;
1535                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1536
1537                         /* simply create a NULL pointer */
1538                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1539                         ir_node  *res  = new_Const(get_mode_null(mode));
1540
1541                         return res;
1542                 }
1543         }
1544
1545         switch ((declaration_kind_t) entity->declaration.kind) {
1546         case DECLARATION_KIND_UNKNOWN:
1547                 break;
1548
1549         case DECLARATION_KIND_LOCAL_VARIABLE:
1550         case DECLARATION_KIND_PARAMETER: {
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
1556         case DECLARATION_KIND_FUNCTION: {
1557                 return create_symconst(dbgi, entity->function.irentity);
1558         }
1559         case DECLARATION_KIND_INNER_FUNCTION: {
1560                 ir_mode *const mode = get_ir_mode_storage(type);
1561                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1562                         /* inner function not using the closure */
1563                         return create_symconst(dbgi, entity->function.irentity);
1564                 } else {
1565                         /* need trampoline here */
1566                         return create_trampoline(dbgi, mode, entity->function.irentity);
1567                 }
1568         }
1569         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1570                 const variable_t *variable = &entity->variable;
1571                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1572                 return deref_address(dbgi, variable->base.type, addr);
1573         }
1574
1575         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1576         case DECLARATION_KIND_PARAMETER_ENTITY: {
1577                 ir_entity *irentity = entity->variable.v.entity;
1578                 ir_node   *frame    = get_local_frame(irentity);
1579                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1580                 return deref_address(dbgi, entity->declaration.type, sel);
1581         }
1582
1583         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1584                 return entity->variable.v.vla_base;
1585
1586         case DECLARATION_KIND_COMPOUND_MEMBER:
1587                 panic("not implemented reference type");
1588         }
1589
1590         panic("reference to declaration with unknown type found");
1591 }
1592
1593 static ir_node *reference_addr(const reference_expression_t *ref)
1594 {
1595         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1596         entity_t *entity = ref->entity;
1597         assert(is_declaration(entity));
1598
1599         switch((declaration_kind_t) entity->declaration.kind) {
1600         case DECLARATION_KIND_UNKNOWN:
1601                 break;
1602         case DECLARATION_KIND_PARAMETER:
1603         case DECLARATION_KIND_LOCAL_VARIABLE:
1604                 /* you can store to a local variable (so we don't panic but return NULL
1605                  * as an indicator for no real address) */
1606                 return NULL;
1607         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1608                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1609                 return addr;
1610         }
1611
1612         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1613         case DECLARATION_KIND_PARAMETER_ENTITY: {
1614                 ir_entity *irentity = entity->variable.v.entity;
1615                 ir_node   *frame    = get_local_frame(irentity);
1616                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1617                 return sel;
1618         }
1619
1620         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1621                 return entity->variable.v.vla_base;
1622
1623         case DECLARATION_KIND_FUNCTION: {
1624                 return create_symconst(dbgi, entity->function.irentity);
1625         }
1626
1627         case DECLARATION_KIND_INNER_FUNCTION: {
1628                 type_t  *const type = skip_typeref(entity->declaration.type);
1629                 ir_mode *const mode = get_ir_mode_storage(type);
1630                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1631                         /* inner function not using the closure */
1632                         return create_symconst(dbgi, entity->function.irentity);
1633                 } else {
1634                         /* need trampoline here */
1635                         return create_trampoline(dbgi, mode, entity->function.irentity);
1636                 }
1637         }
1638
1639         case DECLARATION_KIND_COMPOUND_MEMBER:
1640                 panic("not implemented reference type");
1641         }
1642
1643         panic("reference to declaration with unknown type found");
1644 }
1645
1646 /**
1647  * Transform calls to builtin functions.
1648  */
1649 static ir_node *process_builtin_call(const call_expression_t *call)
1650 {
1651         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1652
1653         assert(call->function->kind == EXPR_REFERENCE);
1654         reference_expression_t *builtin = &call->function->reference;
1655
1656         type_t *expr_type = skip_typeref(builtin->base.type);
1657         assert(is_type_pointer(expr_type));
1658
1659         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1660
1661         switch (builtin->entity->function.btk) {
1662         case BUILTIN_NONE:
1663                 break;
1664         case BUILTIN_ALLOCA: {
1665                 expression_t *argument = call->arguments->expression;
1666                 ir_node      *size     = expression_to_firm(argument);
1667
1668                 ir_node *store  = get_store();
1669                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1670                                               stack_alloc);
1671                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1672                 set_store(proj_m);
1673                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1674
1675                 return res;
1676         }
1677         case BUILTIN_INF: {
1678                 type_t    *type = function_type->function.return_type;
1679                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1680                 ir_tarval *tv   = get_mode_infinite(mode);
1681                 ir_node   *res  = new_d_Const(dbgi, tv);
1682                 return res;
1683         }
1684         case BUILTIN_NAN: {
1685                 /* Ignore string for now... */
1686                 assert(is_type_function(function_type));
1687                 type_t    *type = function_type->function.return_type;
1688                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1689                 ir_tarval *tv   = get_mode_NAN(mode);
1690                 ir_node   *res  = new_d_Const(dbgi, tv);
1691                 return res;
1692         }
1693         case BUILTIN_EXPECT: {
1694                 expression_t *argument = call->arguments->expression;
1695                 return _expression_to_firm(argument);
1696         }
1697         case BUILTIN_VA_END:
1698                 /* evaluate the argument of va_end for its side effects */
1699                 _expression_to_firm(call->arguments->expression);
1700                 return NULL;
1701         case BUILTIN_OBJECT_SIZE: {
1702                 /* determine value of "type" */
1703                 expression_t *type_expression = call->arguments->next->expression;
1704                 long          type_val        = fold_constant_to_int(type_expression);
1705                 type_t       *type            = function_type->function.return_type;
1706                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1707                 /* just produce a "I don't know" result */
1708                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1709                                                 get_mode_minus_one(mode);
1710
1711                 return new_d_Const(dbgi, result);
1712         }
1713         case BUILTIN_ROTL: {
1714                 ir_node *val  = expression_to_firm(call->arguments->expression);
1715                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1716                 ir_mode *mode = get_irn_mode(val);
1717                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1718                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1719         }
1720         case BUILTIN_ROTR: {
1721                 ir_node *val  = expression_to_firm(call->arguments->expression);
1722                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1723                 ir_mode *mode = get_irn_mode(val);
1724                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1725                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1726                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1727                 return new_d_Rotl(dbgi, val, sub, mode);
1728         }
1729         case BUILTIN_FIRM:
1730                 break;
1731         case BUILTIN_LIBC:
1732         case BUILTIN_LIBC_CHECK:
1733                 panic("builtin did not produce an entity");
1734         }
1735         panic("invalid builtin found");
1736 }
1737
1738 /**
1739  * Transform a call expression.
1740  * Handles some special cases, like alloca() calls, which must be resolved
1741  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1742  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1743  * handled right...
1744  */
1745 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1746 {
1747         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1748         assert(currently_reachable());
1749
1750         expression_t   *function = call->function;
1751         ir_node        *callee   = NULL;
1752         bool            firm_builtin = false;
1753         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1754         if (function->kind == EXPR_REFERENCE) {
1755                 const reference_expression_t *ref    = &function->reference;
1756                 entity_t                     *entity = ref->entity;
1757
1758                 if (entity->kind == ENTITY_FUNCTION) {
1759                         builtin_kind_t builtin = entity->function.btk;
1760                         if (builtin == BUILTIN_FIRM) {
1761                                 firm_builtin = true;
1762                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1763                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1764                                    && builtin != BUILTIN_LIBC_CHECK) {
1765                                 return process_builtin_call(call);
1766                         }
1767                 }
1768         }
1769         if (!firm_builtin)
1770                 callee = expression_to_firm(function);
1771
1772         type_t *type = skip_typeref(function->base.type);
1773         assert(is_type_pointer(type));
1774         pointer_type_t *pointer_type = &type->pointer;
1775         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1776         assert(is_type_function(points_to));
1777         function_type_t *function_type = &points_to->function;
1778
1779         int      n_parameters    = 0;
1780         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1781         ir_type *new_method_type = NULL;
1782         if (function_type->variadic || function_type->unspecified_parameters) {
1783                 const call_argument_t *argument = call->arguments;
1784                 for ( ; argument != NULL; argument = argument->next) {
1785                         ++n_parameters;
1786                 }
1787
1788                 /* we need to construct a new method type matching the call
1789                  * arguments... */
1790                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1791                 int n_res       = get_method_n_ress(ir_method_type);
1792                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1793                 set_method_calling_convention(new_method_type,
1794                                get_method_calling_convention(ir_method_type));
1795                 set_method_additional_properties(new_method_type,
1796                                get_method_additional_properties(ir_method_type));
1797                 set_method_variadicity(new_method_type,
1798                                        get_method_variadicity(ir_method_type));
1799
1800                 for (int i = 0; i < n_res; ++i) {
1801                         set_method_res_type(new_method_type, i,
1802                                             get_method_res_type(ir_method_type, i));
1803                 }
1804                 argument = call->arguments;
1805                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1806                         expression_t *expression = argument->expression;
1807                         ir_type      *irtype     = get_ir_type(expression->base.type);
1808                         set_method_param_type(new_method_type, i, irtype);
1809                 }
1810                 ir_method_type = new_method_type;
1811         } else {
1812                 n_parameters = get_method_n_params(ir_method_type);
1813         }
1814
1815         ir_node *in[n_parameters];
1816
1817         const call_argument_t *argument = call->arguments;
1818         for (int n = 0; n < n_parameters; ++n) {
1819                 expression_t *expression = argument->expression;
1820                 ir_node      *arg_node   = expression_to_firm(expression);
1821
1822                 type_t *arg_type = skip_typeref(expression->base.type);
1823                 if (!is_type_compound(arg_type)) {
1824                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1825                         arg_node = create_conv(dbgi, arg_node, mode);
1826                         arg_node = do_strict_conv(dbgi, arg_node);
1827                 }
1828
1829                 in[n] = arg_node;
1830
1831                 argument = argument->next;
1832         }
1833
1834         ir_node *store;
1835         if (function_type->modifiers & DM_CONST) {
1836                 store = get_irg_no_mem(current_ir_graph);
1837         } else {
1838                 store = get_store();
1839         }
1840
1841         ir_node *node;
1842         type_t  *return_type = skip_typeref(function_type->return_type);
1843         ir_node *result      = NULL;
1844         if (firm_builtin) {
1845                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1846                                      ir_method_type);
1847                 if (! (function_type->modifiers & DM_CONST)) {
1848                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1849                         set_store(mem);
1850                 }
1851
1852                 if (!is_type_void(return_type)) {
1853                         assert(is_type_scalar(return_type));
1854                         ir_mode *mode = get_ir_mode_storage(return_type);
1855                         result = new_Proj(node, mode, pn_Builtin_max+1);
1856                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1857                         result              = create_conv(NULL, result, mode_arith);
1858                 }
1859         } else {
1860                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1861                 if (! (function_type->modifiers & DM_CONST)) {
1862                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1863                         set_store(mem);
1864                 }
1865
1866                 if (!is_type_void(return_type)) {
1867                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1868                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1869                         result                    = new_Proj(resproj, mode, 0);
1870                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1871                         result                    = create_conv(NULL, result, mode_arith);
1872                 }
1873         }
1874
1875         if (function_type->modifiers & DM_NORETURN) {
1876                 /* A dead end:  Keep the Call and the Block.  Also place all further
1877                  * nodes into a new and unreachable block. */
1878                 keep_alive(node);
1879                 keep_alive(get_cur_block());
1880                 ir_node *block = new_Block(0, NULL);
1881                 set_cur_block(block);
1882         }
1883
1884         return result;
1885 }
1886
1887 static ir_node *statement_to_firm(statement_t *statement);
1888 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1889
1890 static ir_node *expression_to_addr(const expression_t *expression);
1891 static ir_node *create_condition_evaluation(const expression_t *expression,
1892                                             ir_node *true_block,
1893                                             ir_node *false_block);
1894
1895 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1896                          ir_node *value)
1897 {
1898         if (!is_type_compound(type)) {
1899                 ir_mode *mode = get_ir_mode_storage(type);
1900                 value         = create_conv(dbgi, value, mode);
1901                 value         = do_strict_conv(dbgi, value);
1902         }
1903
1904         ir_node *memory = get_store();
1905
1906         if (is_type_scalar(type)) {
1907                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1908                                       ? cons_volatile : cons_none;
1909                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1910                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1911                 set_store(store_mem);
1912         } else {
1913                 ir_type *irtype    = get_ir_type(type);
1914                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1915                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1916                 set_store(copyb_mem);
1917         }
1918 }
1919
1920 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1921 {
1922         ir_tarval *all_one   = get_mode_all_one(mode);
1923         int        mode_size = get_mode_size_bits(mode);
1924         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1925
1926         assert(offset >= 0);
1927         assert(size   >= 0);
1928         assert(offset + size <= mode_size);
1929         if (size == mode_size) {
1930                 return all_one;
1931         }
1932
1933         long       shiftr    = get_mode_size_bits(mode) - size;
1934         long       shiftl    = offset;
1935         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1936         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1937         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1938         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1939
1940         return mask1;
1941 }
1942
1943 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1944                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1945                 bool need_return)
1946 {
1947         ir_type *entity_type = get_entity_type(entity);
1948         ir_type *base_type   = get_primitive_base_type(entity_type);
1949         ir_mode *mode        = get_type_mode(base_type);
1950         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1951
1952         value = create_conv(dbgi, value, mode);
1953
1954         /* kill upper bits of value and shift to right position */
1955         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1956         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1957         unsigned  base_bits  = get_mode_size_bits(mode);
1958         unsigned  shiftwidth = base_bits - bitsize;
1959
1960         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1961         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1962
1963         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1964         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1965         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1966
1967         /* load current value */
1968         ir_node   *mem             = get_store();
1969         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1970                                           set_volatile ? cons_volatile : cons_none);
1971         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1972         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1973         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1974         ir_tarval *inv_mask        = tarval_not(shift_mask);
1975         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1976         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1977
1978         /* construct new value and store */
1979         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1980         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1981                                          set_volatile ? cons_volatile : cons_none);
1982         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1983         set_store(store_mem);
1984
1985         if (!need_return)
1986                 return NULL;
1987
1988         ir_node *res_shr;
1989         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1990         if (mode_is_signed(mode)) {
1991                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1992         } else {
1993                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1994         }
1995         return res_shr;
1996 }
1997
1998 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1999                                          ir_node *addr)
2000 {
2001         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2002         entity_t *entity    = expression->compound_entry;
2003         type_t   *base_type = entity->declaration.type;
2004         ir_mode  *mode      = get_ir_mode_storage(base_type);
2005         ir_node  *mem       = get_store();
2006         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2007         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2008         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2009         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2010
2011         ir_mode  *amode     = mode;
2012         /* optimisation, since shifting in modes < machine_size is usually
2013          * less efficient */
2014         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2015                 amode = mode_uint;
2016         }
2017         unsigned amode_size = get_mode_size_bits(amode);
2018         load_res = create_conv(dbgi, load_res, amode);
2019
2020         set_store(load_mem);
2021
2022         /* kill upper bits */
2023         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2024         unsigned   bitoffset   = entity->compound_member.bit_offset;
2025         unsigned   bitsize     = entity->compound_member.bit_size;
2026         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2027         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2028         ir_node   *countl      = new_d_Const(dbgi, tvl);
2029         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2030
2031         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2032         assert(shift_bitsr <= amode_size);
2033         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2034         ir_node   *countr      = new_d_Const(dbgi, tvr);
2035         ir_node   *shiftr;
2036         if (mode_is_signed(mode)) {
2037                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2038         } else {
2039                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2040         }
2041
2042         type_t  *type    = expression->base.type;
2043         ir_mode *resmode = get_ir_mode_arithmetic(type);
2044         return create_conv(dbgi, shiftr, resmode);
2045 }
2046
2047 /* make sure the selected compound type is constructed */
2048 static void construct_select_compound(const select_expression_t *expression)
2049 {
2050         type_t *type = skip_typeref(expression->compound->base.type);
2051         if (is_type_pointer(type)) {
2052                 type = type->pointer.points_to;
2053         }
2054         (void) get_ir_type(type);
2055 }
2056
2057 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2058                                               ir_node *value, ir_node *addr)
2059 {
2060         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2061         type_t   *type = skip_typeref(expression->base.type);
2062
2063         if (!is_type_compound(type)) {
2064                 ir_mode  *mode = get_ir_mode_storage(type);
2065                 value          = create_conv(dbgi, value, mode);
2066                 value          = do_strict_conv(dbgi, value);
2067         }
2068
2069         if (expression->kind == EXPR_REFERENCE) {
2070                 const reference_expression_t *ref = &expression->reference;
2071
2072                 entity_t *entity = ref->entity;
2073                 assert(is_declaration(entity));
2074                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2075                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2076                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2077                         set_value(entity->variable.v.value_number, value);
2078                         return value;
2079                 }
2080         }
2081
2082         if (addr == NULL)
2083                 addr = expression_to_addr(expression);
2084         assert(addr != NULL);
2085
2086         if (expression->kind == EXPR_SELECT) {
2087                 const select_expression_t *select = &expression->select;
2088
2089                 construct_select_compound(select);
2090
2091                 entity_t *entity = select->compound_entry;
2092                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2093                 if (entity->compound_member.bitfield) {
2094                         ir_entity *irentity = entity->compound_member.entity;
2095                         bool       set_volatile
2096                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2097                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2098                                                        set_volatile, true);
2099                         return value;
2100                 }
2101         }
2102
2103         assign_value(dbgi, addr, type, value);
2104         return value;
2105 }
2106
2107 static void set_value_for_expression(const expression_t *expression,
2108                                      ir_node *value)
2109 {
2110         set_value_for_expression_addr(expression, value, NULL);
2111 }
2112
2113 static ir_node *get_value_from_lvalue(const expression_t *expression,
2114                                       ir_node *addr)
2115 {
2116         if (expression->kind == EXPR_REFERENCE) {
2117                 const reference_expression_t *ref = &expression->reference;
2118
2119                 entity_t *entity = ref->entity;
2120                 assert(entity->kind == ENTITY_VARIABLE
2121                                 || entity->kind == ENTITY_PARAMETER);
2122                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2123                 int value_number;
2124                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2125                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2126                         value_number = entity->variable.v.value_number;
2127                         assert(addr == NULL);
2128                         type_t  *type = skip_typeref(expression->base.type);
2129                         ir_mode *mode = get_ir_mode_storage(type);
2130                         ir_node *res  = get_value(value_number, mode);
2131                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2132                 }
2133         }
2134
2135         assert(addr != NULL);
2136         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2137
2138         ir_node *value;
2139         if (expression->kind == EXPR_SELECT &&
2140             expression->select.compound_entry->compound_member.bitfield) {
2141             construct_select_compound(&expression->select);
2142                 value = bitfield_extract_to_firm(&expression->select, addr);
2143         } else {
2144                 value = deref_address(dbgi, expression->base.type, addr);
2145         }
2146
2147         return value;
2148 }
2149
2150
2151 static ir_node *create_incdec(const unary_expression_t *expression)
2152 {
2153         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2154         const expression_t *value_expr = expression->value;
2155         ir_node            *addr       = expression_to_addr(value_expr);
2156         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2157
2158         type_t  *type = skip_typeref(expression->base.type);
2159         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2160
2161         ir_node *offset;
2162         if (is_type_pointer(type)) {
2163                 pointer_type_t *pointer_type = &type->pointer;
2164                 offset = get_type_size_node(pointer_type->points_to);
2165         } else {
2166                 assert(is_type_arithmetic(type));
2167                 offset = new_Const(get_mode_one(mode));
2168         }
2169
2170         ir_node *result;
2171         ir_node *store_value;
2172         switch(expression->base.kind) {
2173         case EXPR_UNARY_POSTFIX_INCREMENT:
2174                 result      = value;
2175                 store_value = new_d_Add(dbgi, value, offset, mode);
2176                 break;
2177         case EXPR_UNARY_POSTFIX_DECREMENT:
2178                 result      = value;
2179                 store_value = new_d_Sub(dbgi, value, offset, mode);
2180                 break;
2181         case EXPR_UNARY_PREFIX_INCREMENT:
2182                 result      = new_d_Add(dbgi, value, offset, mode);
2183                 store_value = result;
2184                 break;
2185         case EXPR_UNARY_PREFIX_DECREMENT:
2186                 result      = new_d_Sub(dbgi, value, offset, mode);
2187                 store_value = result;
2188                 break;
2189         default:
2190                 panic("no incdec expr in create_incdec");
2191         }
2192
2193         set_value_for_expression_addr(value_expr, store_value, addr);
2194
2195         return result;
2196 }
2197
2198 static bool is_local_variable(expression_t *expression)
2199 {
2200         if (expression->kind != EXPR_REFERENCE)
2201                 return false;
2202         reference_expression_t *ref_expr = &expression->reference;
2203         entity_t               *entity   = ref_expr->entity;
2204         if (entity->kind != ENTITY_VARIABLE)
2205                 return false;
2206         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2207         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2208 }
2209
2210 static ir_relation get_relation(const expression_kind_t kind)
2211 {
2212         switch(kind) {
2213         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2214         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2215         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2216         case EXPR_BINARY_ISLESS:
2217         case EXPR_BINARY_LESS:          return ir_relation_less;
2218         case EXPR_BINARY_ISLESSEQUAL:
2219         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2220         case EXPR_BINARY_ISGREATER:
2221         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2222         case EXPR_BINARY_ISGREATEREQUAL:
2223         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2224         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2225
2226         default:
2227                 break;
2228         }
2229         panic("trying to get pn_Cmp from non-comparison binexpr type");
2230 }
2231
2232 /**
2233  * Handle the assume optimizer hint: check if a Confirm
2234  * node can be created.
2235  *
2236  * @param dbi    debug info
2237  * @param expr   the IL assume expression
2238  *
2239  * we support here only some simple cases:
2240  *  - var rel const
2241  *  - const rel val
2242  *  - var rel var
2243  */
2244 static ir_node *handle_assume_compare(dbg_info *dbi,
2245                                       const binary_expression_t *expression)
2246 {
2247         expression_t *op1 = expression->left;
2248         expression_t *op2 = expression->right;
2249         entity_t     *var2, *var = NULL;
2250         ir_node      *res      = NULL;
2251         ir_relation   relation = get_relation(expression->base.kind);
2252
2253         if (is_local_variable(op1) && is_local_variable(op2)) {
2254                 var  = op1->reference.entity;
2255             var2 = op2->reference.entity;
2256
2257                 type_t  *const type = skip_typeref(var->declaration.type);
2258                 ir_mode *const mode = get_ir_mode_storage(type);
2259
2260                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2261                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2262
2263                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2264                 set_value(var2->variable.v.value_number, res);
2265
2266                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2267                 set_value(var->variable.v.value_number, res);
2268
2269                 return res;
2270         }
2271
2272         expression_t *con = NULL;
2273         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2274                 var = op1->reference.entity;
2275                 con = op2;
2276         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2277                 relation = get_inversed_relation(relation);
2278                 var = op2->reference.entity;
2279                 con = op1;
2280         }
2281
2282         if (var != NULL) {
2283                 type_t  *const type = skip_typeref(var->declaration.type);
2284                 ir_mode *const mode = get_ir_mode_storage(type);
2285
2286                 res = get_value(var->variable.v.value_number, mode);
2287                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2288                 set_value(var->variable.v.value_number, res);
2289         }
2290         return res;
2291 }
2292
2293 /**
2294  * Handle the assume optimizer hint.
2295  *
2296  * @param dbi    debug info
2297  * @param expr   the IL assume expression
2298  */
2299 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2300 {
2301         switch(expression->kind) {
2302         case EXPR_BINARY_EQUAL:
2303         case EXPR_BINARY_NOTEQUAL:
2304         case EXPR_BINARY_LESS:
2305         case EXPR_BINARY_LESSEQUAL:
2306         case EXPR_BINARY_GREATER:
2307         case EXPR_BINARY_GREATEREQUAL:
2308                 return handle_assume_compare(dbi, &expression->binary);
2309         default:
2310                 return NULL;
2311         }
2312 }
2313
2314 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2315                             type_t *from_type, type_t *type)
2316 {
2317         type = skip_typeref(type);
2318         if (is_type_void(type)) {
2319                 /* make sure firm type is constructed */
2320                 (void) get_ir_type(type);
2321                 return NULL;
2322         }
2323         if (!is_type_scalar(type)) {
2324                 /* make sure firm type is constructed */
2325                 (void) get_ir_type(type);
2326                 return value_node;
2327         }
2328
2329         from_type     = skip_typeref(from_type);
2330         ir_mode *mode = get_ir_mode_storage(type);
2331         /* check for conversion from / to __based types */
2332         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2333                 const variable_t *from_var = from_type->pointer.base_variable;
2334                 const variable_t *to_var   = type->pointer.base_variable;
2335                 if (from_var != to_var) {
2336                         if (from_var != NULL) {
2337                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2338                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2339                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2340                         }
2341                         if (to_var != NULL) {
2342                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2343                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2344                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2345                         }
2346                 }
2347         }
2348
2349         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2350                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2351                  * convert to mode_b so we only get a 0/1 value */
2352                 value_node = create_conv(dbgi, value_node, mode_b);
2353         }
2354
2355         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2356         ir_node *node       = create_conv(dbgi, value_node, mode);
2357         node                = do_strict_conv(dbgi, node);
2358         node                = create_conv(dbgi, node, mode_arith);
2359
2360         return node;
2361 }
2362
2363 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2364 {
2365         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2366         type_t   *type = skip_typeref(expression->base.type);
2367
2368         const expression_t *value = expression->value;
2369
2370         switch(expression->base.kind) {
2371         case EXPR_UNARY_TAKE_ADDRESS:
2372                 return expression_to_addr(value);
2373
2374         case EXPR_UNARY_NEGATE: {
2375                 ir_node *value_node = expression_to_firm(value);
2376                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2377                 return new_d_Minus(dbgi, value_node, mode);
2378         }
2379         case EXPR_UNARY_PLUS:
2380                 return expression_to_firm(value);
2381         case EXPR_UNARY_BITWISE_NEGATE: {
2382                 ir_node *value_node = expression_to_firm(value);
2383                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2384                 return new_d_Not(dbgi, value_node, mode);
2385         }
2386         case EXPR_UNARY_NOT: {
2387                 ir_node *value_node = _expression_to_firm(value);
2388                 value_node          = create_conv(dbgi, value_node, mode_b);
2389                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2390                 return res;
2391         }
2392         case EXPR_UNARY_DEREFERENCE: {
2393                 ir_node *value_node = expression_to_firm(value);
2394                 type_t  *value_type = skip_typeref(value->base.type);
2395                 assert(is_type_pointer(value_type));
2396
2397                 /* check for __based */
2398                 const variable_t *const base_var = value_type->pointer.base_variable;
2399                 if (base_var != NULL) {
2400                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2401                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2402                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2403                 }
2404                 type_t  *points_to  = value_type->pointer.points_to;
2405                 return deref_address(dbgi, points_to, value_node);
2406         }
2407         case EXPR_UNARY_POSTFIX_INCREMENT:
2408         case EXPR_UNARY_POSTFIX_DECREMENT:
2409         case EXPR_UNARY_PREFIX_INCREMENT:
2410         case EXPR_UNARY_PREFIX_DECREMENT:
2411                 return create_incdec(expression);
2412         case EXPR_UNARY_CAST: {
2413                 ir_node *value_node = expression_to_firm(value);
2414                 type_t  *from_type  = value->base.type;
2415                 return create_cast(dbgi, value_node, from_type, type);
2416         }
2417         case EXPR_UNARY_ASSUME:
2418                 return handle_assume(dbgi, value);
2419
2420         default:
2421                 break;
2422         }
2423         panic("invalid UNEXPR type found");
2424 }
2425
2426 /**
2427  * produces a 0/1 depending of the value of a mode_b node
2428  */
2429 static ir_node *produce_condition_result(const expression_t *expression,
2430                                          ir_mode *mode, dbg_info *dbgi)
2431 {
2432         ir_node *const one_block  = new_immBlock();
2433         ir_node *const zero_block = new_immBlock();
2434         create_condition_evaluation(expression, one_block, zero_block);
2435         mature_immBlock(one_block);
2436         mature_immBlock(zero_block);
2437
2438         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2439         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2440         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2441         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2442         set_cur_block(block);
2443
2444         ir_node *const one   = new_Const(get_mode_one(mode));
2445         ir_node *const zero  = new_Const(get_mode_null(mode));
2446         ir_node *const in[2] = { one, zero };
2447         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2448
2449         return val;
2450 }
2451
2452 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2453                 ir_node *value, type_t *type)
2454 {
2455         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2456         assert(is_type_pointer(type));
2457         pointer_type_t *const pointer_type = &type->pointer;
2458         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2459         ir_node        *      elem_size    = get_type_size_node(points_to);
2460         elem_size                          = create_conv(dbgi, elem_size, mode);
2461         value                              = create_conv(dbgi, value,     mode);
2462         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2463         return mul;
2464 }
2465
2466 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2467                           ir_node *left, ir_node *right)
2468 {
2469         ir_mode  *mode;
2470         type_t   *type_left  = skip_typeref(expression->left->base.type);
2471         type_t   *type_right = skip_typeref(expression->right->base.type);
2472
2473         expression_kind_t kind = expression->base.kind;
2474
2475         switch (kind) {
2476         case EXPR_BINARY_SHIFTLEFT:
2477         case EXPR_BINARY_SHIFTRIGHT:
2478         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2479         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2480                 mode  = get_ir_mode_arithmetic(expression->base.type);
2481                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2482                 break;
2483
2484         case EXPR_BINARY_SUB:
2485                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2486                         const pointer_type_t *const ptr_type = &type_left->pointer;
2487
2488                         mode = get_ir_mode_arithmetic(expression->base.type);
2489                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2490                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2491                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2492                         ir_node *const no_mem    = new_NoMem();
2493                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2494                                                                                                    mode, op_pin_state_floats);
2495                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2496                 }
2497                 /* fallthrough */
2498         case EXPR_BINARY_SUB_ASSIGN:
2499                 if (is_type_pointer(type_left)) {
2500                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2501                         mode  = get_ir_mode_arithmetic(type_left);
2502                         break;
2503                 }
2504                 goto normal_node;
2505
2506         case EXPR_BINARY_ADD:
2507         case EXPR_BINARY_ADD_ASSIGN:
2508                 if (is_type_pointer(type_left)) {
2509                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2510                         mode  = get_ir_mode_arithmetic(type_left);
2511                         break;
2512                 } else if (is_type_pointer(type_right)) {
2513                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2514                         mode  = get_ir_mode_arithmetic(type_right);
2515                         break;
2516                 }
2517                 goto normal_node;
2518
2519         default:
2520 normal_node:
2521                 mode = get_ir_mode_arithmetic(type_right);
2522                 left = create_conv(dbgi, left, mode);
2523                 break;
2524         }
2525
2526         switch (kind) {
2527         case EXPR_BINARY_ADD_ASSIGN:
2528         case EXPR_BINARY_ADD:
2529                 return new_d_Add(dbgi, left, right, mode);
2530         case EXPR_BINARY_SUB_ASSIGN:
2531         case EXPR_BINARY_SUB:
2532                 return new_d_Sub(dbgi, left, right, mode);
2533         case EXPR_BINARY_MUL_ASSIGN:
2534         case EXPR_BINARY_MUL:
2535                 return new_d_Mul(dbgi, left, right, mode);
2536         case EXPR_BINARY_BITWISE_AND:
2537         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2538                 return new_d_And(dbgi, left, right, mode);
2539         case EXPR_BINARY_BITWISE_OR:
2540         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2541                 return new_d_Or(dbgi, left, right, mode);
2542         case EXPR_BINARY_BITWISE_XOR:
2543         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2544                 return new_d_Eor(dbgi, left, right, mode);
2545         case EXPR_BINARY_SHIFTLEFT:
2546         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2547                 return new_d_Shl(dbgi, left, right, mode);
2548         case EXPR_BINARY_SHIFTRIGHT:
2549         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2550                 if (mode_is_signed(mode)) {
2551                         return new_d_Shrs(dbgi, left, right, mode);
2552                 } else {
2553                         return new_d_Shr(dbgi, left, right, mode);
2554                 }
2555         case EXPR_BINARY_DIV:
2556         case EXPR_BINARY_DIV_ASSIGN: {
2557                 ir_node *pin = new_Pin(new_NoMem());
2558                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2559                                          op_pin_state_floats);
2560                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2561                 return res;
2562         }
2563         case EXPR_BINARY_MOD:
2564         case EXPR_BINARY_MOD_ASSIGN: {
2565                 ir_node *pin = new_Pin(new_NoMem());
2566                 assert(!mode_is_float(mode));
2567                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2568                                          op_pin_state_floats);
2569                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2570                 return res;
2571         }
2572         default:
2573                 panic("unexpected expression kind");
2574         }
2575 }
2576
2577 static ir_node *create_lazy_op(const binary_expression_t *expression)
2578 {
2579         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2580         type_t   *type = skip_typeref(expression->base.type);
2581         ir_mode  *mode = get_ir_mode_arithmetic(type);
2582
2583         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2584                 bool val = fold_constant_to_bool(expression->left);
2585                 expression_kind_t ekind = expression->base.kind;
2586                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2587                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2588                         if (!val) {
2589                                 return new_Const(get_mode_null(mode));
2590                         }
2591                 } else {
2592                         if (val) {
2593                                 return new_Const(get_mode_one(mode));
2594                         }
2595                 }
2596
2597                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2598                         bool valr = fold_constant_to_bool(expression->right);
2599                         return create_Const_from_bool(mode, valr);
2600                 }
2601
2602                 return produce_condition_result(expression->right, mode, dbgi);
2603         }
2604
2605         return produce_condition_result((const expression_t*) expression, mode,
2606                                         dbgi);
2607 }
2608
2609 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2610                                             ir_node *right, ir_mode *mode);
2611
2612 static ir_node *create_assign_binop(const binary_expression_t *expression)
2613 {
2614         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2615         const expression_t *left_expr = expression->left;
2616         type_t             *type      = skip_typeref(left_expr->base.type);
2617         ir_node            *right     = expression_to_firm(expression->right);
2618         ir_node            *left_addr = expression_to_addr(left_expr);
2619         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2620         ir_node            *result    = create_op(dbgi, expression, left, right);
2621
2622         result = create_cast(dbgi, result, expression->right->base.type, type);
2623         result = do_strict_conv(dbgi, result);
2624
2625         result = set_value_for_expression_addr(left_expr, result, left_addr);
2626
2627         if (!is_type_compound(type)) {
2628                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2629                 result = create_conv(dbgi, result, mode_arithmetic);
2630         }
2631         return result;
2632 }
2633
2634 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2635 {
2636         expression_kind_t kind = expression->base.kind;
2637
2638         switch(kind) {
2639         case EXPR_BINARY_EQUAL:
2640         case EXPR_BINARY_NOTEQUAL:
2641         case EXPR_BINARY_LESS:
2642         case EXPR_BINARY_LESSEQUAL:
2643         case EXPR_BINARY_GREATER:
2644         case EXPR_BINARY_GREATEREQUAL:
2645         case EXPR_BINARY_ISGREATER:
2646         case EXPR_BINARY_ISGREATEREQUAL:
2647         case EXPR_BINARY_ISLESS:
2648         case EXPR_BINARY_ISLESSEQUAL:
2649         case EXPR_BINARY_ISLESSGREATER:
2650         case EXPR_BINARY_ISUNORDERED: {
2651                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2652                 ir_node    *left     = expression_to_firm(expression->left);
2653                 ir_node    *right    = expression_to_firm(expression->right);
2654                 ir_relation relation = get_relation(kind);
2655                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2656                 return cmp;
2657         }
2658         case EXPR_BINARY_ASSIGN: {
2659                 ir_node *addr  = expression_to_addr(expression->left);
2660                 ir_node *right = expression_to_firm(expression->right);
2661                 ir_node *res
2662                         = set_value_for_expression_addr(expression->left, right, addr);
2663
2664                 type_t  *type            = skip_typeref(expression->base.type);
2665                 if (!is_type_compound(type)) {
2666                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2667                         res                      = create_conv(NULL, res, mode_arithmetic);
2668                 }
2669                 return res;
2670         }
2671         case EXPR_BINARY_ADD:
2672         case EXPR_BINARY_SUB:
2673         case EXPR_BINARY_MUL:
2674         case EXPR_BINARY_DIV:
2675         case EXPR_BINARY_MOD:
2676         case EXPR_BINARY_BITWISE_AND:
2677         case EXPR_BINARY_BITWISE_OR:
2678         case EXPR_BINARY_BITWISE_XOR:
2679         case EXPR_BINARY_SHIFTLEFT:
2680         case EXPR_BINARY_SHIFTRIGHT:
2681         {
2682                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2683                 ir_node  *left  = expression_to_firm(expression->left);
2684                 ir_node  *right = expression_to_firm(expression->right);
2685                 return create_op(dbgi, expression, left, right);
2686         }
2687         case EXPR_BINARY_LOGICAL_AND:
2688         case EXPR_BINARY_LOGICAL_OR:
2689                 return create_lazy_op(expression);
2690         case EXPR_BINARY_COMMA:
2691                 /* create side effects of left side */
2692                 (void) expression_to_firm(expression->left);
2693                 return _expression_to_firm(expression->right);
2694
2695         case EXPR_BINARY_ADD_ASSIGN:
2696         case EXPR_BINARY_SUB_ASSIGN:
2697         case EXPR_BINARY_MUL_ASSIGN:
2698         case EXPR_BINARY_MOD_ASSIGN:
2699         case EXPR_BINARY_DIV_ASSIGN:
2700         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2701         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2702         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2703         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2704         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2705                 return create_assign_binop(expression);
2706         default:
2707                 panic("TODO binexpr type");
2708         }
2709 }
2710
2711 static ir_node *array_access_addr(const array_access_expression_t *expression)
2712 {
2713         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2714         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2715         ir_node  *offset      = expression_to_firm(expression->index);
2716         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2717         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2718         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2719
2720         return result;
2721 }
2722
2723 static ir_node *array_access_to_firm(
2724                 const array_access_expression_t *expression)
2725 {
2726         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2727         ir_node  *addr   = array_access_addr(expression);
2728         type_t   *type   = revert_automatic_type_conversion(
2729                         (const expression_t*) expression);
2730         type             = skip_typeref(type);
2731
2732         return deref_address(dbgi, type, addr);
2733 }
2734
2735 static long get_offsetof_offset(const offsetof_expression_t *expression)
2736 {
2737         type_t *orig_type = expression->type;
2738         long    offset    = 0;
2739
2740         designator_t *designator = expression->designator;
2741         for ( ; designator != NULL; designator = designator->next) {
2742                 type_t *type = skip_typeref(orig_type);
2743                 /* be sure the type is constructed */
2744                 (void) get_ir_type(type);
2745
2746                 if (designator->symbol != NULL) {
2747                         assert(is_type_compound(type));
2748                         symbol_t *symbol = designator->symbol;
2749
2750                         compound_t *compound = type->compound.compound;
2751                         entity_t   *iter     = compound->members.entities;
2752                         for ( ; iter != NULL; iter = iter->base.next) {
2753                                 if (iter->base.symbol == symbol) {
2754                                         break;
2755                                 }
2756                         }
2757                         assert(iter != NULL);
2758
2759                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2760                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2761                         offset += get_entity_offset(iter->compound_member.entity);
2762
2763                         orig_type = iter->declaration.type;
2764                 } else {
2765                         expression_t *array_index = designator->array_index;
2766                         assert(designator->array_index != NULL);
2767                         assert(is_type_array(type));
2768
2769                         long index         = fold_constant_to_int(array_index);
2770                         ir_type *arr_type  = get_ir_type(type);
2771                         ir_type *elem_type = get_array_element_type(arr_type);
2772                         long     elem_size = get_type_size_bytes(elem_type);
2773
2774                         offset += index * elem_size;
2775
2776                         orig_type = type->array.element_type;
2777                 }
2778         }
2779
2780         return offset;
2781 }
2782
2783 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2784 {
2785         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2786         long       offset = get_offsetof_offset(expression);
2787         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2788         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2789
2790         return new_d_Const(dbgi, tv);
2791 }
2792
2793 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2794                                      ir_entity *entity, type_t *type);
2795 static ir_initializer_t *create_ir_initializer(
2796                 const initializer_t *initializer, type_t *type);
2797
2798 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2799                                             initializer_t *initializer,
2800                                             type_t *type)
2801 {
2802         /* create the ir_initializer */
2803         ir_graph *const old_current_ir_graph = current_ir_graph;
2804         current_ir_graph = get_const_code_irg();
2805
2806         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2807
2808         assert(current_ir_graph == get_const_code_irg());
2809         current_ir_graph = old_current_ir_graph;
2810
2811         ident     *const id          = id_unique("initializer.%u");
2812         ir_type   *const irtype      = get_ir_type(type);
2813         ir_type   *const global_type = get_glob_type();
2814         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2815         set_entity_ld_ident(entity, id);
2816         set_entity_visibility(entity, ir_visibility_private);
2817         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2818         set_entity_initializer(entity, irinitializer);
2819         return entity;
2820 }
2821
2822 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2823 {
2824         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2825         type_t        *type        = expression->type;
2826         initializer_t *initializer = expression->initializer;
2827
2828         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2829                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2830                 return create_symconst(dbgi, entity);
2831         } else {
2832                 /* create an entity on the stack */
2833                 ident   *const id     = id_unique("CompLit.%u");
2834                 ir_type *const irtype = get_ir_type(type);
2835                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2836
2837                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2838                 set_entity_ld_ident(entity, id);
2839
2840                 /* create initialisation code */
2841                 create_local_initializer(initializer, dbgi, entity, type);
2842
2843                 /* create a sel for the compound literal address */
2844                 ir_node *frame = get_irg_frame(current_ir_graph);
2845                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2846                 return sel;
2847         }
2848 }
2849
2850 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2851 {
2852         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2853         type_t   *const type = expr->type;
2854         ir_node  *const addr = compound_literal_addr(expr);
2855         return deref_address(dbgi, type, addr);
2856 }
2857
2858 /**
2859  * Transform a sizeof expression into Firm code.
2860  */
2861 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2862 {
2863         type_t *const type = skip_typeref(expression->type);
2864         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2865         if (is_type_array(type) && type->array.is_vla
2866                         && expression->tp_expression != NULL) {
2867                 expression_to_firm(expression->tp_expression);
2868         }
2869
2870         return get_type_size_node(type);
2871 }
2872
2873 static entity_t *get_expression_entity(const expression_t *expression)
2874 {
2875         if (expression->kind != EXPR_REFERENCE)
2876                 return NULL;
2877
2878         return expression->reference.entity;
2879 }
2880
2881 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2882 {
2883         switch(entity->kind) {
2884         case DECLARATION_KIND_CASES:
2885                 return entity->declaration.alignment;
2886         case ENTITY_STRUCT:
2887         case ENTITY_UNION:
2888                 return entity->compound.alignment;
2889         case ENTITY_TYPEDEF:
2890                 return entity->typedefe.alignment;
2891         default:
2892                 break;
2893         }
2894         return 0;
2895 }
2896
2897 /**
2898  * Transform an alignof expression into Firm code.
2899  */
2900 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2901 {
2902         unsigned alignment = 0;
2903
2904         const expression_t *tp_expression = expression->tp_expression;
2905         if (tp_expression != NULL) {
2906                 entity_t *entity = get_expression_entity(tp_expression);
2907                 if (entity != NULL) {
2908                         alignment = get_cparser_entity_alignment(entity);
2909                 }
2910         }
2911
2912         if (alignment == 0) {
2913                 type_t *type = expression->type;
2914                 alignment = get_type_alignment(type);
2915         }
2916
2917         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2918         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2919         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2920         return new_d_Const(dbgi, tv);
2921 }
2922
2923 static void init_ir_types(void);
2924
2925 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2926 {
2927         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2928
2929         bool constant_folding_old = constant_folding;
2930         constant_folding = true;
2931         int old_optimize         = get_optimize();
2932         int old_constant_folding = get_opt_constant_folding();
2933         set_optimize(1);
2934         set_opt_constant_folding(1);
2935
2936         init_ir_types();
2937
2938         ir_graph *old_current_ir_graph = current_ir_graph;
2939         current_ir_graph = get_const_code_irg();
2940
2941         ir_node *const cnst = _expression_to_firm(expression);
2942
2943         current_ir_graph = old_current_ir_graph;
2944         set_optimize(old_optimize);
2945         set_opt_constant_folding(old_constant_folding);
2946
2947         if (!is_Const(cnst)) {
2948                 panic("couldn't fold constant");
2949         }
2950
2951         constant_folding = constant_folding_old;
2952
2953         ir_tarval *const tv   = get_Const_tarval(cnst);
2954         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2955         return tarval_convert_to(tv, mode);
2956 }
2957
2958 /* this function is only used in parser.c, but it relies on libfirm functionality */
2959 bool constant_is_negative(const expression_t *expression)
2960 {
2961         ir_tarval *tv = fold_constant_to_tarval(expression);
2962         return tarval_is_negative(tv);
2963 }
2964
2965 long fold_constant_to_int(const expression_t *expression)
2966 {
2967         ir_tarval *tv = fold_constant_to_tarval(expression);
2968         if (!tarval_is_long(tv)) {
2969                 panic("result of constant folding is not integer");
2970         }
2971
2972         return get_tarval_long(tv);
2973 }
2974
2975 bool fold_constant_to_bool(const expression_t *expression)
2976 {
2977         ir_tarval *tv = fold_constant_to_tarval(expression);
2978         return !tarval_is_null(tv);
2979 }
2980
2981 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2982 {
2983         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2984
2985         /* first try to fold a constant condition */
2986         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2987                 bool val = fold_constant_to_bool(expression->condition);
2988                 if (val) {
2989                         expression_t *true_expression = expression->true_expression;
2990                         if (true_expression == NULL)
2991                                 true_expression = expression->condition;
2992                         return expression_to_firm(true_expression);
2993                 } else {
2994                         return expression_to_firm(expression->false_expression);
2995                 }
2996         }
2997
2998         ir_node *const true_block  = new_immBlock();
2999         ir_node *const false_block = new_immBlock();
3000         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3001         mature_immBlock(true_block);
3002         mature_immBlock(false_block);
3003
3004         set_cur_block(true_block);
3005         ir_node *true_val;
3006         if (expression->true_expression != NULL) {
3007                 true_val = expression_to_firm(expression->true_expression);
3008         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3009                 true_val = cond_expr;
3010         } else {
3011                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3012                  * comparison.  Generate a "1" as value for the true branch. */
3013                 true_val = new_Const(get_mode_one(mode_Is));
3014         }
3015         ir_node *const true_jmp = new_d_Jmp(dbgi);
3016
3017         set_cur_block(false_block);
3018         ir_node *const false_val = expression_to_firm(expression->false_expression);
3019         ir_node *const false_jmp = new_d_Jmp(dbgi);
3020
3021         /* create the common block */
3022         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3023         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3024         set_cur_block(block);
3025
3026         /* TODO improve static semantics, so either both or no values are NULL */
3027         if (true_val == NULL || false_val == NULL)
3028                 return NULL;
3029
3030         ir_node *const in[2] = { true_val, false_val };
3031         type_t  *const type  = skip_typeref(expression->base.type);
3032         ir_mode *const mode  = get_ir_mode_arithmetic(type);
3033         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3034
3035         return val;
3036 }
3037
3038 /**
3039  * Returns an IR-node representing the address of a field.
3040  */
3041 static ir_node *select_addr(const select_expression_t *expression)
3042 {
3043         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3044
3045         construct_select_compound(expression);
3046
3047         ir_node *compound_addr = expression_to_firm(expression->compound);
3048
3049         entity_t *entry = expression->compound_entry;
3050         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3051         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3052
3053         if (constant_folding) {
3054                 ir_mode *mode      = get_irn_mode(compound_addr);
3055                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3056                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3057                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3058         } else {
3059                 ir_entity *irentity = entry->compound_member.entity;
3060                 assert(irentity != NULL);
3061                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3062         }
3063 }
3064
3065 static ir_node *select_to_firm(const select_expression_t *expression)
3066 {
3067         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3068         ir_node  *addr = select_addr(expression);
3069         type_t   *type = revert_automatic_type_conversion(
3070                         (const expression_t*) expression);
3071         type           = skip_typeref(type);
3072
3073         entity_t *entry = expression->compound_entry;
3074         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3075
3076         if (entry->compound_member.bitfield) {
3077                 return bitfield_extract_to_firm(expression, addr);
3078         }
3079
3080         return deref_address(dbgi, type, addr);
3081 }
3082
3083 /* Values returned by __builtin_classify_type. */
3084 typedef enum gcc_type_class
3085 {
3086         no_type_class = -1,
3087         void_type_class,
3088         integer_type_class,
3089         char_type_class,
3090         enumeral_type_class,
3091         boolean_type_class,
3092         pointer_type_class,
3093         reference_type_class,
3094         offset_type_class,
3095         real_type_class,
3096         complex_type_class,
3097         function_type_class,
3098         method_type_class,
3099         record_type_class,
3100         union_type_class,
3101         array_type_class,
3102         string_type_class,
3103         set_type_class,
3104         file_type_class,
3105         lang_type_class
3106 } gcc_type_class;
3107
3108 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3109 {
3110         type_t *type = expr->type_expression->base.type;
3111
3112         /* FIXME gcc returns different values depending on whether compiling C or C++
3113          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3114         gcc_type_class tc;
3115         for (;;) {
3116                 type = skip_typeref(type);
3117                 switch (type->kind) {
3118                         case TYPE_ATOMIC: {
3119                                 const atomic_type_t *const atomic_type = &type->atomic;
3120                                 switch (atomic_type->akind) {
3121                                         /* should not be reached */
3122                                         case ATOMIC_TYPE_INVALID:
3123                                                 tc = no_type_class;
3124                                                 goto make_const;
3125
3126                                         /* gcc cannot do that */
3127                                         case ATOMIC_TYPE_VOID:
3128                                                 tc = void_type_class;
3129                                                 goto make_const;
3130
3131                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3132                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3133                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3134                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3135                                         case ATOMIC_TYPE_SHORT:
3136                                         case ATOMIC_TYPE_USHORT:
3137                                         case ATOMIC_TYPE_INT:
3138                                         case ATOMIC_TYPE_UINT:
3139                                         case ATOMIC_TYPE_LONG:
3140                                         case ATOMIC_TYPE_ULONG:
3141                                         case ATOMIC_TYPE_LONGLONG:
3142                                         case ATOMIC_TYPE_ULONGLONG:
3143                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3144                                                 tc = integer_type_class;
3145                                                 goto make_const;
3146
3147                                         case ATOMIC_TYPE_FLOAT:
3148                                         case ATOMIC_TYPE_DOUBLE:
3149                                         case ATOMIC_TYPE_LONG_DOUBLE:
3150                                                 tc = real_type_class;
3151                                                 goto make_const;
3152                                 }
3153                                 panic("Unexpected atomic type in classify_type_to_firm().");
3154                         }
3155
3156                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3157                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3158                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3159                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3160                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3161                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3162                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3163
3164                         /* gcc handles this as integer */
3165                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3166
3167                         /* gcc classifies the referenced type */
3168                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3169
3170                         /* typedef/typeof should be skipped already */
3171                         case TYPE_TYPEDEF:
3172                         case TYPE_TYPEOF:
3173                         case TYPE_ERROR:
3174                                 break;
3175                 }
3176                 panic("unexpected TYPE classify_type_to_firm().");
3177         }
3178
3179 make_const:;
3180         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3181         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3182         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3183         return new_d_Const(dbgi, tv);
3184 }
3185
3186 static ir_node *function_name_to_firm(
3187                 const funcname_expression_t *const expr)
3188 {
3189         switch(expr->kind) {
3190         case FUNCNAME_FUNCTION:
3191         case FUNCNAME_PRETTY_FUNCTION:
3192         case FUNCNAME_FUNCDNAME:
3193                 if (current_function_name == NULL) {
3194                         const source_position_t *const src_pos = &expr->base.source_position;
3195                         const char    *name  = current_function_entity->base.symbol->string;
3196                         const string_t string = { name, strlen(name) + 1 };
3197                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3198                 }
3199                 return current_function_name;
3200         case FUNCNAME_FUNCSIG:
3201                 if (current_funcsig == NULL) {
3202                         const source_position_t *const src_pos = &expr->base.source_position;
3203                         ir_entity *ent = get_irg_entity(current_ir_graph);
3204                         const char *const name = get_entity_ld_name(ent);
3205                         const string_t string = { name, strlen(name) + 1 };
3206                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3207                 }
3208                 return current_funcsig;
3209         }
3210         panic("Unsupported function name");
3211 }
3212
3213 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3214 {
3215         statement_t *statement = expr->statement;
3216
3217         assert(statement->kind == STATEMENT_COMPOUND);
3218         return compound_statement_to_firm(&statement->compound);
3219 }
3220
3221 static ir_node *va_start_expression_to_firm(
3222         const va_start_expression_t *const expr)
3223 {
3224         ir_entity *param_ent = current_vararg_entity;
3225         if (param_ent == NULL) {
3226                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3227                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3228                 ir_type *const param_type  = get_unknown_type();
3229                 param_ent = new_parameter_entity(frame_type, n, param_type);
3230                 current_vararg_entity = param_ent;
3231         }
3232
3233         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3234         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3235         ir_node  *const no_mem  = new_NoMem();
3236         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3237
3238         set_value_for_expression(expr->ap, arg_sel);
3239
3240         return NULL;
3241 }
3242
3243 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3244 {
3245         type_t       *const type    = expr->base.type;
3246         expression_t *const ap_expr = expr->ap;
3247         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3248         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3249         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3250         ir_node      *const res     = deref_address(dbgi, type, ap);
3251
3252         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3253         ir_mode      *const mode    = get_irn_mode(cnst);
3254         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3255         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3256         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3257         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3258         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3259
3260         set_value_for_expression_addr(ap_expr, add, ap_addr);
3261
3262         return res;
3263 }
3264
3265 /**
3266  * Generate Firm for a va_copy expression.
3267  */
3268 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3269 {
3270         ir_node *const src = expression_to_firm(expr->src);
3271         set_value_for_expression(expr->dst, src);
3272         return NULL;
3273 }
3274
3275 static ir_node *dereference_addr(const unary_expression_t *const expression)
3276 {
3277         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3278         return expression_to_firm(expression->value);
3279 }
3280
3281 /**
3282  * Returns a IR-node representing an lvalue of the given expression.
3283  */
3284 static ir_node *expression_to_addr(const expression_t *expression)
3285 {
3286         switch(expression->kind) {
3287         case EXPR_ARRAY_ACCESS:
3288                 return array_access_addr(&expression->array_access);
3289         case EXPR_CALL:
3290                 return call_expression_to_firm(&expression->call);
3291         case EXPR_COMPOUND_LITERAL:
3292                 return compound_literal_addr(&expression->compound_literal);
3293         case EXPR_REFERENCE:
3294                 return reference_addr(&expression->reference);
3295         case EXPR_SELECT:
3296                 return select_addr(&expression->select);
3297         case EXPR_UNARY_DEREFERENCE:
3298                 return dereference_addr(&expression->unary);
3299         default:
3300                 break;
3301         }
3302         panic("trying to get address of non-lvalue");
3303 }
3304
3305 static ir_node *builtin_constant_to_firm(
3306                 const builtin_constant_expression_t *expression)
3307 {
3308         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3309         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3310         return create_Const_from_bool(mode, v);
3311 }
3312
3313 static ir_node *builtin_types_compatible_to_firm(
3314                 const builtin_types_compatible_expression_t *expression)
3315 {
3316         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3317         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3318         bool     const value = types_compatible(left, right);
3319         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3320         return create_Const_from_bool(mode, value);
3321 }
3322
3323 static ir_node *get_label_block(label_t *label)
3324 {
3325         if (label->block != NULL)
3326                 return label->block;
3327
3328         /* beware: might be called from create initializer with current_ir_graph
3329          * set to const_code_irg. */
3330         ir_graph *rem    = current_ir_graph;
3331         current_ir_graph = current_function;
3332
3333         ir_node *block = new_immBlock();
3334
3335         label->block = block;
3336
3337         ARR_APP1(label_t *, all_labels, label);
3338
3339         current_ir_graph = rem;
3340         return block;
3341 }
3342
3343 /**
3344  * Pointer to a label.  This is used for the
3345  * GNU address-of-label extension.
3346  */
3347 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3348 {
3349         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3350         ir_node   *block  = get_label_block(label->label);
3351         ir_entity *entity = create_Block_entity(block);
3352
3353         symconst_symbol value;
3354         value.entity_p = entity;
3355         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3356 }
3357
3358 /**
3359  * creates firm nodes for an expression. The difference between this function
3360  * and expression_to_firm is, that this version might produce mode_b nodes
3361  * instead of mode_Is.
3362  */
3363 static ir_node *_expression_to_firm(expression_t const *const expr)
3364 {
3365 #ifndef NDEBUG
3366         if (!constant_folding) {
3367                 assert(!expr->base.transformed);
3368                 ((expression_t*)expr)->base.transformed = true;
3369         }
3370 #endif
3371
3372         switch (expr->kind) {
3373         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3374         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3375         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3376         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3377         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3378         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3379         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3380         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3381         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3382         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3383         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3384         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3385         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3386         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3387         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3388         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3389         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3390         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3391         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3392         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3393         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3394         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3395         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3396
3397         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3398
3399         case EXPR_ERROR: break;
3400         }
3401         panic("invalid expression found");
3402 }
3403
3404 /**
3405  * Check if a given expression is a GNU __builtin_expect() call.
3406  */
3407 static bool is_builtin_expect(const expression_t *expression)
3408 {
3409         if (expression->kind != EXPR_CALL)
3410                 return false;
3411
3412         expression_t *function = expression->call.function;
3413         if (function->kind != EXPR_REFERENCE)
3414                 return false;
3415         reference_expression_t *ref = &function->reference;
3416         if (ref->entity->kind         != ENTITY_FUNCTION ||
3417             ref->entity->function.btk != BUILTIN_EXPECT)
3418                 return false;
3419
3420         return true;
3421 }
3422
3423 static bool produces_mode_b(const expression_t *expression)
3424 {
3425         switch (expression->kind) {
3426         case EXPR_BINARY_EQUAL:
3427         case EXPR_BINARY_NOTEQUAL:
3428         case EXPR_BINARY_LESS:
3429         case EXPR_BINARY_LESSEQUAL:
3430         case EXPR_BINARY_GREATER:
3431         case EXPR_BINARY_GREATEREQUAL:
3432         case EXPR_BINARY_ISGREATER:
3433         case EXPR_BINARY_ISGREATEREQUAL:
3434         case EXPR_BINARY_ISLESS:
3435         case EXPR_BINARY_ISLESSEQUAL:
3436         case EXPR_BINARY_ISLESSGREATER:
3437         case EXPR_BINARY_ISUNORDERED:
3438         case EXPR_UNARY_NOT:
3439                 return true;
3440
3441         case EXPR_CALL:
3442                 if (is_builtin_expect(expression)) {
3443                         expression_t *argument = expression->call.arguments->expression;
3444                         return produces_mode_b(argument);
3445                 }
3446                 return false;
3447         case EXPR_BINARY_COMMA:
3448                 return produces_mode_b(expression->binary.right);
3449
3450         default:
3451                 return false;
3452         }
3453 }
3454
3455 static ir_node *expression_to_firm(const expression_t *expression)
3456 {
3457         if (!produces_mode_b(expression)) {
3458                 ir_node *res = _expression_to_firm(expression);
3459                 assert(res == NULL || get_irn_mode(res) != mode_b);
3460                 return res;
3461         }
3462
3463         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3464                 return new_Const(fold_constant_to_tarval(expression));
3465         }
3466
3467         /* we have to produce a 0/1 from the mode_b expression */
3468         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3469         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3470         return produce_condition_result(expression, mode, dbgi);
3471 }
3472
3473 /**
3474  * create a short-circuit expression evaluation that tries to construct
3475  * efficient control flow structures for &&, || and ! expressions
3476  */
3477 static ir_node *create_condition_evaluation(const expression_t *expression,
3478                                             ir_node *true_block,
3479                                             ir_node *false_block)
3480 {
3481         switch(expression->kind) {
3482         case EXPR_UNARY_NOT: {
3483                 const unary_expression_t *unary_expression = &expression->unary;
3484                 create_condition_evaluation(unary_expression->value, false_block,
3485                                             true_block);
3486                 return NULL;
3487         }
3488         case EXPR_BINARY_LOGICAL_AND: {
3489                 const binary_expression_t *binary_expression = &expression->binary;
3490
3491                 ir_node *extra_block = new_immBlock();
3492                 create_condition_evaluation(binary_expression->left, extra_block,
3493                                             false_block);
3494                 mature_immBlock(extra_block);
3495                 set_cur_block(extra_block);
3496                 create_condition_evaluation(binary_expression->right, true_block,
3497                                             false_block);
3498                 return NULL;
3499         }
3500         case EXPR_BINARY_LOGICAL_OR: {
3501                 const binary_expression_t *binary_expression = &expression->binary;
3502
3503                 ir_node *extra_block = new_immBlock();
3504                 create_condition_evaluation(binary_expression->left, true_block,
3505                                             extra_block);
3506                 mature_immBlock(extra_block);
3507                 set_cur_block(extra_block);
3508                 create_condition_evaluation(binary_expression->right, true_block,
3509                                             false_block);
3510                 return NULL;
3511         }
3512         default:
3513                 break;
3514         }
3515
3516         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3517         ir_node  *cond_expr  = _expression_to_firm(expression);
3518         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3519         ir_node  *cond       = new_d_Cond(dbgi, condition);
3520         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3521         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3522
3523         /* set branch prediction info based on __builtin_expect */
3524         if (is_builtin_expect(expression) && is_Cond(cond)) {
3525                 call_argument_t *argument = expression->call.arguments->next;
3526                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3527                         bool               const cnst = fold_constant_to_bool(argument->expression);
3528                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3529                         set_Cond_jmp_pred(cond, pred);
3530                 }
3531         }
3532
3533         add_immBlock_pred(true_block, true_proj);
3534         add_immBlock_pred(false_block, false_proj);
3535
3536         set_unreachable_now();
3537         return cond_expr;
3538 }
3539
3540 static void create_variable_entity(entity_t *variable,
3541                                    declaration_kind_t declaration_kind,
3542                                    ir_type *parent_type)
3543 {
3544         assert(variable->kind == ENTITY_VARIABLE);
3545         type_t    *type = skip_typeref(variable->declaration.type);
3546
3547         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3548         ir_type   *const irtype    = get_ir_type(type);
3549         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3550         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3551         unsigned         alignment = variable->declaration.alignment;
3552
3553         set_entity_alignment(irentity, alignment);
3554
3555         handle_decl_modifiers(irentity, variable);
3556
3557         variable->declaration.kind  = (unsigned char) declaration_kind;
3558         variable->variable.v.entity = irentity;
3559         set_entity_ld_ident(irentity, create_ld_ident(variable));
3560
3561         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3562                 set_entity_volatility(irentity, volatility_is_volatile);
3563         }
3564 }
3565
3566
3567 typedef struct type_path_entry_t type_path_entry_t;
3568 struct type_path_entry_t {
3569         type_t           *type;
3570         ir_initializer_t *initializer;
3571         size_t            index;
3572         entity_t         *compound_entry;
3573 };
3574
3575 typedef struct type_path_t type_path_t;
3576 struct type_path_t {
3577         type_path_entry_t *path;
3578         type_t            *top_type;
3579         bool               invalid;
3580 };
3581
3582 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3583 {
3584         size_t len = ARR_LEN(path->path);
3585
3586         for (size_t i = 0; i < len; ++i) {
3587                 const type_path_entry_t *entry = & path->path[i];
3588
3589                 type_t *type = skip_typeref(entry->type);
3590                 if (is_type_compound(type)) {
3591                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3592                 } else if (is_type_array(type)) {
3593                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3594                 } else {
3595                         fprintf(stderr, "-INVALID-");
3596                 }
3597         }
3598         fprintf(stderr, "  (");
3599         print_type(path->top_type);
3600         fprintf(stderr, ")");
3601 }
3602
3603 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3604 {
3605         size_t len = ARR_LEN(path->path);
3606         assert(len > 0);
3607         return & path->path[len-1];
3608 }
3609
3610 static type_path_entry_t *append_to_type_path(type_path_t *path)
3611 {
3612         size_t len = ARR_LEN(path->path);
3613         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3614
3615         type_path_entry_t *result = & path->path[len];
3616         memset(result, 0, sizeof(result[0]));
3617         return result;
3618 }
3619
3620 static size_t get_compound_member_count(const compound_type_t *type)
3621 {
3622         compound_t *compound  = type->compound;
3623         size_t      n_members = 0;
3624         entity_t   *member    = compound->members.entities;
3625         for ( ; member != NULL; member = member->base.next) {
3626                 ++n_members;
3627         }
3628
3629         return n_members;
3630 }
3631
3632 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3633 {
3634         type_t *orig_top_type = path->top_type;
3635         type_t *top_type      = skip_typeref(orig_top_type);
3636
3637         assert(is_type_compound(top_type) || is_type_array(top_type));
3638
3639         if (ARR_LEN(path->path) == 0) {
3640                 return NULL;
3641         } else {
3642                 type_path_entry_t *top         = get_type_path_top(path);
3643                 ir_initializer_t  *initializer = top->initializer;
3644                 return get_initializer_compound_value(initializer, top->index);
3645         }
3646 }
3647
3648 static void descend_into_subtype(type_path_t *path)
3649 {
3650         type_t *orig_top_type = path->top_type;
3651         type_t *top_type      = skip_typeref(orig_top_type);
3652
3653         assert(is_type_compound(top_type) || is_type_array(top_type));
3654
3655         ir_initializer_t *initializer = get_initializer_entry(path);
3656
3657         type_path_entry_t *top = append_to_type_path(path);
3658         top->type              = top_type;
3659
3660         size_t len;
3661
3662         if (is_type_compound(top_type)) {
3663                 compound_t *const compound = top_type->compound.compound;
3664                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3665
3666                 top->compound_entry = entry;
3667                 top->index          = 0;
3668                 len                 = get_compound_member_count(&top_type->compound);
3669                 if (entry != NULL) {
3670                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3671                         path->top_type = entry->declaration.type;
3672                 }
3673         } else {
3674                 assert(is_type_array(top_type));
3675                 assert(top_type->array.size > 0);
3676
3677                 top->index     = 0;
3678                 path->top_type = top_type->array.element_type;
3679                 len            = top_type->array.size;
3680         }
3681         if (initializer == NULL
3682                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3683                 initializer = create_initializer_compound(len);
3684                 /* we have to set the entry at the 2nd latest path entry... */
3685                 size_t path_len = ARR_LEN(path->path);
3686                 assert(path_len >= 1);
3687                 if (path_len > 1) {
3688                         type_path_entry_t *entry        = & path->path[path_len-2];
3689                         ir_initializer_t  *tinitializer = entry->initializer;
3690                         set_initializer_compound_value(tinitializer, entry->index,
3691                                                        initializer);
3692                 }
3693         }
3694         top->initializer = initializer;
3695 }
3696
3697 static void ascend_from_subtype(type_path_t *path)
3698 {
3699         type_path_entry_t *top = get_type_path_top(path);
3700
3701         path->top_type = top->type;
3702
3703         size_t len = ARR_LEN(path->path);
3704         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3705 }
3706
3707 static void walk_designator(type_path_t *path, const designator_t *designator)
3708 {
3709         /* designators start at current object type */
3710         ARR_RESIZE(type_path_entry_t, path->path, 1);
3711
3712         for ( ; designator != NULL; designator = designator->next) {
3713                 type_path_entry_t *top         = get_type_path_top(path);
3714                 type_t            *orig_type   = top->type;
3715                 type_t            *type        = skip_typeref(orig_type);
3716
3717                 if (designator->symbol != NULL) {
3718                         assert(is_type_compound(type));
3719                         size_t    index  = 0;
3720                         symbol_t *symbol = designator->symbol;
3721
3722                         compound_t *compound = type->compound.compound;
3723                         entity_t   *iter     = compound->members.entities;
3724                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3725                                 if (iter->base.symbol == symbol) {
3726                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3727                                         break;
3728                                 }
3729                         }
3730                         assert(iter != NULL);
3731
3732                         /* revert previous initialisations of other union elements */
3733                         if (type->kind == TYPE_COMPOUND_UNION) {
3734                                 ir_initializer_t *initializer = top->initializer;
3735                                 if (initializer != NULL
3736                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3737                                         /* are we writing to a new element? */
3738                                         ir_initializer_t *oldi
3739                                                 = get_initializer_compound_value(initializer, index);
3740                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3741                                                 /* clear initializer */
3742                                                 size_t len
3743                                                         = get_initializer_compound_n_entries(initializer);
3744                                                 ir_initializer_t *nulli = get_initializer_null();
3745                                                 for (size_t i = 0; i < len; ++i) {
3746                                                         set_initializer_compound_value(initializer, i,
3747                                                                                        nulli);
3748                                                 }
3749                                         }
3750                                 }
3751                         }
3752
3753                         top->type           = orig_type;
3754                         top->compound_entry = iter;
3755                         top->index          = index;
3756                         orig_type           = iter->declaration.type;
3757                 } else {
3758                         expression_t *array_index = designator->array_index;
3759                         assert(designator->array_index != NULL);
3760                         assert(is_type_array(type));
3761
3762                         long index = fold_constant_to_int(array_index);
3763                         assert(index >= 0);
3764 #ifndef NDEBUG
3765                         if (type->array.size_constant) {
3766                                 long array_size = type->array.size;
3767                                 assert(index < array_size);
3768                         }
3769 #endif
3770
3771                         top->type  = orig_type;
3772                         top->index = (size_t) index;
3773                         orig_type  = type->array.element_type;
3774                 }
3775                 path->top_type = orig_type;
3776
3777                 if (designator->next != NULL) {
3778                         descend_into_subtype(path);
3779                 }
3780         }
3781
3782         path->invalid  = false;
3783 }
3784
3785 static void advance_current_object(type_path_t *path)
3786 {
3787         if (path->invalid) {
3788                 /* TODO: handle this... */
3789                 panic("invalid initializer in ast2firm (excessive elements)");
3790         }
3791
3792         type_path_entry_t *top = get_type_path_top(path);
3793
3794         type_t *type = skip_typeref(top->type);
3795         if (is_type_union(type)) {
3796                 /* only the first element is initialized in unions */
3797                 top->compound_entry = NULL;
3798         } else if (is_type_struct(type)) {
3799                 entity_t *entry = top->compound_entry;
3800
3801                 top->index++;
3802                 entry               = skip_unnamed_bitfields(entry->base.next);
3803                 top->compound_entry = entry;
3804                 if (entry != NULL) {
3805                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3806                         path->top_type = entry->declaration.type;
3807                         return;
3808                 }
3809         } else {
3810                 assert(is_type_array(type));
3811
3812                 top->index++;
3813                 if (!type->array.size_constant || top->index < type->array.size) {
3814                         return;
3815                 }
3816         }
3817
3818         /* we're past the last member of the current sub-aggregate, try if we
3819          * can ascend in the type hierarchy and continue with another subobject */
3820         size_t len = ARR_LEN(path->path);
3821
3822         if (len > 1) {
3823                 ascend_from_subtype(path);
3824                 advance_current_object(path);
3825         } else {
3826                 path->invalid = true;
3827         }
3828 }
3829
3830
3831 static ir_initializer_t *create_ir_initializer_value(
3832                 const initializer_value_t *initializer)
3833 {
3834         if (is_type_compound(initializer->value->base.type)) {
3835                 panic("initializer creation for compounds not implemented yet");
3836         }
3837         type_t       *type = initializer->value->base.type;
3838         expression_t *expr = initializer->value;
3839         ir_node *value = expression_to_firm(expr);
3840         ir_mode *mode  = get_ir_mode_storage(type);
3841         value          = create_conv(NULL, value, mode);
3842         return create_initializer_const(value);
3843 }
3844
3845 /** test wether type can be initialized by a string constant */
3846 static bool is_string_type(type_t *type)
3847 {
3848         type_t *inner;
3849         if (is_type_pointer(type)) {
3850                 inner = skip_typeref(type->pointer.points_to);
3851         } else if(is_type_array(type)) {
3852                 inner = skip_typeref(type->array.element_type);
3853         } else {
3854                 return false;
3855         }
3856
3857         return is_type_integer(inner);
3858 }
3859
3860 static ir_initializer_t *create_ir_initializer_list(
3861                 const initializer_list_t *initializer, type_t *type)
3862 {
3863         type_path_t path;
3864         memset(&path, 0, sizeof(path));
3865         path.top_type = type;
3866         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3867
3868         descend_into_subtype(&path);
3869
3870         for (size_t i = 0; i < initializer->len; ++i) {
3871                 const initializer_t *sub_initializer = initializer->initializers[i];
3872
3873                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3874                         walk_designator(&path, sub_initializer->designator.designator);
3875                         continue;
3876                 }
3877
3878                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3879                         /* we might have to descend into types until we're at a scalar
3880                          * type */
3881                         while(true) {
3882                                 type_t *orig_top_type = path.top_type;
3883                                 type_t *top_type      = skip_typeref(orig_top_type);
3884
3885                                 if (is_type_scalar(top_type))
3886                                         break;
3887                                 descend_into_subtype(&path);
3888                         }
3889                 } else if (sub_initializer->kind == INITIALIZER_STRING
3890                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3891                         /* we might have to descend into types until we're at a scalar
3892                          * type */
3893                         while (true) {
3894                                 type_t *orig_top_type = path.top_type;
3895                                 type_t *top_type      = skip_typeref(orig_top_type);
3896
3897                                 if (is_string_type(top_type))
3898                                         break;
3899                                 descend_into_subtype(&path);
3900                         }
3901                 }
3902
3903                 ir_initializer_t *sub_irinitializer
3904                         = create_ir_initializer(sub_initializer, path.top_type);
3905
3906                 size_t path_len = ARR_LEN(path.path);
3907                 assert(path_len >= 1);
3908                 type_path_entry_t *entry        = & path.path[path_len-1];
3909                 ir_initializer_t  *tinitializer = entry->initializer;
3910                 set_initializer_compound_value(tinitializer, entry->index,
3911                                                sub_irinitializer);
3912
3913                 advance_current_object(&path);
3914         }
3915
3916         assert(ARR_LEN(path.path) >= 1);
3917         ir_initializer_t *result = path.path[0].initializer;
3918         DEL_ARR_F(path.path);
3919
3920         return result;
3921 }
3922
3923 static ir_initializer_t *create_ir_initializer_string(
3924                 const initializer_string_t *initializer, type_t *type)
3925 {
3926         type = skip_typeref(type);
3927
3928         size_t            string_len    = initializer->string.size;
3929         assert(type->kind == TYPE_ARRAY);
3930         assert(type->array.size_constant);
3931         size_t            len           = type->array.size;
3932         ir_initializer_t *irinitializer = create_initializer_compound(len);
3933
3934         const char *string = initializer->string.begin;
3935         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3936
3937         for (size_t i = 0; i < len; ++i) {
3938                 char c = 0;
3939                 if (i < string_len)
3940                         c = string[i];
3941
3942                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3943                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3944
3945                 set_initializer_compound_value(irinitializer, i, char_initializer);
3946         }
3947
3948         return irinitializer;
3949 }
3950
3951 static ir_initializer_t *create_ir_initializer_wide_string(
3952                 const initializer_wide_string_t *initializer, type_t *type)
3953 {
3954         assert(type->kind == TYPE_ARRAY);
3955         assert(type->array.size_constant);
3956         size_t            len           = type->array.size;
3957         size_t            string_len    = wstrlen(&initializer->string);
3958         ir_initializer_t *irinitializer = create_initializer_compound(len);
3959
3960         const char *p    = initializer->string.begin;
3961         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
3962
3963         for (size_t i = 0; i < len; ++i) {
3964                 utf32 c = 0;
3965                 if (i < string_len) {
3966                         c = read_utf8_char(&p);
3967                 }
3968                 ir_tarval *tv = new_tarval_from_long(c, mode);
3969                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3970
3971                 set_initializer_compound_value(irinitializer, i, char_initializer);
3972         }
3973
3974         return irinitializer;
3975 }
3976
3977 static ir_initializer_t *create_ir_initializer(
3978                 const initializer_t *initializer, type_t *type)
3979 {
3980         switch(initializer->kind) {
3981                 case INITIALIZER_STRING:
3982                         return create_ir_initializer_string(&initializer->string, type);
3983
3984                 case INITIALIZER_WIDE_STRING:
3985                         return create_ir_initializer_wide_string(&initializer->wide_string,
3986                                                                  type);
3987
3988                 case INITIALIZER_LIST:
3989                         return create_ir_initializer_list(&initializer->list, type);
3990
3991                 case INITIALIZER_VALUE:
3992                         return create_ir_initializer_value(&initializer->value);
3993
3994                 case INITIALIZER_DESIGNATOR:
3995                         panic("unexpected designator initializer found");
3996         }
3997         panic("unknown initializer");
3998 }
3999
4000 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4001  *  are elements [...] the remainder of the aggregate shall be initialized
4002  *  implicitly the same as objects that have static storage duration. */
4003 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4004                 ir_node *base_addr)
4005 {
4006         /* for unions we must NOT do anything for null initializers */
4007         ir_type *owner = get_entity_owner(entity);
4008         if (is_Union_type(owner)) {
4009                 return;
4010         }
4011
4012         ir_type *ent_type = get_entity_type(entity);
4013         /* create sub-initializers for a compound type */
4014         if (is_compound_type(ent_type)) {
4015                 unsigned n_members = get_compound_n_members(ent_type);
4016                 for (unsigned n = 0; n < n_members; ++n) {
4017                         ir_entity *member = get_compound_member(ent_type, n);
4018                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4019                                                                 member);
4020                         create_dynamic_null_initializer(member, dbgi, addr);
4021                 }
4022                 return;
4023         }
4024         if (is_Array_type(ent_type)) {
4025                 assert(has_array_upper_bound(ent_type, 0));
4026                 long n = get_array_upper_bound_int(ent_type, 0);
4027                 for (long i = 0; i < n; ++i) {
4028                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4029                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4030                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4031                         ir_node   *in[1]    = { cnst };
4032                         ir_entity *arrent   = get_array_element_entity(ent_type);
4033                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4034                                                         arrent);
4035                         create_dynamic_null_initializer(arrent, dbgi, addr);
4036                 }
4037                 return;
4038         }
4039
4040         ir_mode *value_mode = get_type_mode(ent_type);
4041         ir_node *node       = new_Const(get_mode_null(value_mode));
4042
4043         /* is it a bitfield type? */
4044         if (is_Primitive_type(ent_type) &&
4045                         get_primitive_base_type(ent_type) != NULL) {
4046                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4047                 return;
4048         }
4049
4050         ir_node *mem    = get_store();
4051         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4052         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4053         set_store(proj_m);
4054 }
4055
4056 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4057                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4058 {
4059         switch(get_initializer_kind(initializer)) {
4060         case IR_INITIALIZER_NULL:
4061                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4062                 return;
4063         case IR_INITIALIZER_CONST: {
4064                 ir_node *node     = get_initializer_const_value(initializer);
4065                 ir_type *ent_type = get_entity_type(entity);
4066
4067                 /* is it a bitfield type? */
4068                 if (is_Primitive_type(ent_type) &&
4069                                 get_primitive_base_type(ent_type) != NULL) {
4070                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4071                         return;
4072                 }
4073
4074                 assert(get_type_mode(type) == get_irn_mode(node));
4075                 ir_node *mem    = get_store();
4076                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4077                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4078                 set_store(proj_m);
4079                 return;
4080         }
4081         case IR_INITIALIZER_TARVAL: {
4082                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4083                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4084                 ir_type   *ent_type = get_entity_type(entity);
4085
4086                 /* is it a bitfield type? */
4087                 if (is_Primitive_type(ent_type) &&
4088                                 get_primitive_base_type(ent_type) != NULL) {
4089                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4090                         return;
4091                 }
4092
4093                 assert(get_type_mode(type) == get_tarval_mode(tv));
4094                 ir_node *mem    = get_store();
4095                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4096                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4097                 set_store(proj_m);
4098                 return;
4099         }
4100         case IR_INITIALIZER_COMPOUND: {
4101                 assert(is_compound_type(type) || is_Array_type(type));
4102                 int n_members;
4103                 if (is_Array_type(type)) {
4104                         assert(has_array_upper_bound(type, 0));
4105                         n_members = get_array_upper_bound_int(type, 0);
4106                 } else {
4107                         n_members = get_compound_n_members(type);
4108                 }
4109
4110                 if (get_initializer_compound_n_entries(initializer)
4111                                 != (unsigned) n_members)
4112                         panic("initializer doesn't match compound type");
4113
4114                 for (int i = 0; i < n_members; ++i) {
4115                         ir_node   *addr;
4116                         ir_type   *irtype;
4117                         ir_entity *sub_entity;
4118                         if (is_Array_type(type)) {
4119                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4120                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4121                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4122                                 ir_node   *in[1]    = { cnst };
4123                                 irtype     = get_array_element_type(type);
4124                                 sub_entity = get_array_element_entity(type);
4125                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4126                                                        sub_entity);
4127                         } else {
4128                                 sub_entity = get_compound_member(type, i);
4129                                 irtype     = get_entity_type(sub_entity);
4130                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4131                                                              sub_entity);
4132                         }
4133
4134                         ir_initializer_t *sub_init
4135                                 = get_initializer_compound_value(initializer, i);
4136
4137                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4138                                                        addr);
4139                 }
4140                 return;
4141         }
4142         }
4143
4144         panic("invalid IR_INITIALIZER found");
4145 }
4146
4147 static void create_dynamic_initializer(ir_initializer_t *initializer,
4148                 dbg_info *dbgi, ir_entity *entity)
4149 {
4150         ir_node *frame     = get_irg_frame(current_ir_graph);
4151         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4152         ir_type *type      = get_entity_type(entity);
4153
4154         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4155 }
4156
4157 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4158                                      ir_entity *entity, type_t *type)
4159 {
4160         ir_node *memory = get_store();
4161         ir_node *nomem  = new_NoMem();
4162         ir_node *frame  = get_irg_frame(current_ir_graph);
4163         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4164
4165         if (initializer->kind == INITIALIZER_VALUE) {
4166                 initializer_value_t *initializer_value = &initializer->value;
4167
4168                 ir_node *value = expression_to_firm(initializer_value->value);
4169                 type = skip_typeref(type);
4170                 assign_value(dbgi, addr, type, value);
4171                 return;
4172         }
4173
4174         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4175                 ir_initializer_t *irinitializer
4176                         = create_ir_initializer(initializer, type);
4177
4178                 create_dynamic_initializer(irinitializer, dbgi, entity);
4179                 return;
4180         }
4181
4182         /* create a "template" entity which is copied to the entity on the stack */
4183         ir_entity *const init_entity
4184                 = create_initializer_entity(dbgi, initializer, type);
4185         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4186         ir_type *const irtype   = get_ir_type(type);
4187         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4188
4189         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4190         set_store(copyb_mem);
4191 }
4192
4193 static void create_initializer_local_variable_entity(entity_t *entity)
4194 {
4195         assert(entity->kind == ENTITY_VARIABLE);
4196         initializer_t *initializer = entity->variable.initializer;
4197         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4198         ir_entity     *irentity    = entity->variable.v.entity;
4199         type_t        *type        = entity->declaration.type;
4200
4201         create_local_initializer(initializer, dbgi, irentity, type);
4202 }
4203
4204 static void create_variable_initializer(entity_t *entity)
4205 {
4206         assert(entity->kind == ENTITY_VARIABLE);
4207         initializer_t *initializer = entity->variable.initializer;
4208         if (initializer == NULL)
4209                 return;
4210
4211         declaration_kind_t declaration_kind
4212                 = (declaration_kind_t) entity->declaration.kind;
4213         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4214                 create_initializer_local_variable_entity(entity);
4215                 return;
4216         }
4217
4218         type_t            *type = entity->declaration.type;
4219         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4220
4221         if (initializer->kind == INITIALIZER_VALUE) {
4222                 expression_t *      value     = initializer->value.value;
4223                 type_t       *const init_type = skip_typeref(value->base.type);
4224
4225                 if (!is_type_scalar(init_type)) {
4226                         /* skip convs */
4227                         while (value->kind == EXPR_UNARY_CAST)
4228                                 value = value->unary.value;
4229
4230                         if (value->kind != EXPR_COMPOUND_LITERAL)
4231                                 panic("expected non-scalar initializer to be a compound literal");
4232                         initializer = value->compound_literal.initializer;
4233                         goto have_initializer;
4234                 }
4235
4236                 ir_node  *      node = expression_to_firm(value);
4237                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4238                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4239                 node = create_conv(dbgi, node, mode);
4240                 node = do_strict_conv(dbgi, node);
4241
4242                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4243                         set_value(entity->variable.v.value_number, node);
4244                 } else {
4245                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4246
4247                         ir_entity *irentity = entity->variable.v.entity;
4248
4249                         if (tq & TYPE_QUALIFIER_CONST
4250                                         && get_entity_owner(irentity) != get_tls_type()) {
4251                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4252                         }
4253                         set_atomic_ent_value(irentity, node);
4254                 }
4255         } else {
4256 have_initializer:
4257                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4258                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4259
4260                 ir_entity        *irentity        = entity->variable.v.entity;
4261                 ir_initializer_t *irinitializer
4262                         = create_ir_initializer(initializer, type);
4263
4264                 if (tq & TYPE_QUALIFIER_CONST) {
4265                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4266                 }
4267                 set_entity_initializer(irentity, irinitializer);
4268         }
4269 }
4270
4271 static void create_variable_length_array(entity_t *entity)
4272 {
4273         assert(entity->kind == ENTITY_VARIABLE);
4274         assert(entity->variable.initializer == NULL);
4275
4276         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4277         entity->variable.v.vla_base = NULL;
4278
4279         /* TODO: record VLA somewhere so we create the free node when we leave
4280          * it's scope */
4281 }
4282
4283 static void allocate_variable_length_array(entity_t *entity)
4284 {
4285         assert(entity->kind == ENTITY_VARIABLE);
4286         assert(entity->variable.initializer == NULL);
4287         assert(currently_reachable());
4288
4289         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4290         type_t   *type      = entity->declaration.type;
4291         ir_type  *el_type   = get_ir_type(type->array.element_type);
4292
4293         /* make sure size_node is calculated */
4294         get_type_size_node(type);
4295         ir_node  *elems = type->array.size_node;
4296         ir_node  *mem   = get_store();
4297         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4298
4299         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4300         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4301         set_store(proj_m);
4302
4303         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4304         entity->variable.v.vla_base = addr;
4305 }
4306
4307 /**
4308  * Creates a Firm local variable from a declaration.
4309  */
4310 static void create_local_variable(entity_t *entity)
4311 {
4312         assert(entity->kind == ENTITY_VARIABLE);
4313         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4314
4315         bool needs_entity = entity->variable.address_taken;
4316         type_t *type = skip_typeref(entity->declaration.type);
4317
4318         /* is it a variable length array? */
4319         if (is_type_array(type) && !type->array.size_constant) {
4320                 create_variable_length_array(entity);
4321                 return;
4322         } else if (is_type_array(type) || is_type_compound(type)) {
4323                 needs_entity = true;
4324         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4325                 needs_entity = true;
4326         }
4327
4328         if (needs_entity) {
4329                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4330                 create_variable_entity(entity,
4331                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4332                                        frame_type);
4333         } else {
4334                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4335                 entity->variable.v.value_number = next_value_number_function;
4336                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4337                                         entity);
4338                 ++next_value_number_function;
4339         }
4340 }
4341
4342 static void create_local_static_variable(entity_t *entity)
4343 {
4344         assert(entity->kind == ENTITY_VARIABLE);
4345         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4346
4347         type_t   *type           = skip_typeref(entity->declaration.type);
4348         ir_type  *const var_type = entity->variable.thread_local ?
4349                 get_tls_type() : get_glob_type();
4350         ir_type  *const irtype   = get_ir_type(type);
4351         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4352
4353         size_t l = strlen(entity->base.symbol->string);
4354         char   buf[l + sizeof(".%u")];
4355         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4356         ident     *const id       = id_unique(buf);
4357         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4358
4359         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4360                 set_entity_volatility(irentity, volatility_is_volatile);
4361         }
4362
4363         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4364         entity->variable.v.entity = irentity;
4365
4366         set_entity_ld_ident(irentity, id);
4367         set_entity_visibility(irentity, ir_visibility_local);
4368
4369         if (entity->variable.initializer == NULL) {
4370                 ir_initializer_t *null_init = get_initializer_null();
4371                 set_entity_initializer(irentity, null_init);
4372         }
4373
4374         ir_graph *const old_current_ir_graph = current_ir_graph;
4375         current_ir_graph = get_const_code_irg();
4376
4377         create_variable_initializer(entity);
4378
4379         assert(current_ir_graph == get_const_code_irg());
4380         current_ir_graph = old_current_ir_graph;
4381 }
4382
4383
4384
4385 static ir_node *return_statement_to_firm(return_statement_t *statement)
4386 {
4387         if (!currently_reachable())
4388                 return NULL;
4389
4390         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4391         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4392         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4393
4394         int in_len;
4395         if (!is_type_void(type)) {
4396                 ir_mode *const mode = get_ir_mode_storage(type);
4397                 if (res) {
4398                         res = create_conv(dbgi, res, mode);
4399                         res = do_strict_conv(dbgi, res);
4400                 } else {
4401                         res = new_Unknown(mode);
4402                 }
4403                 in_len = 1;
4404         } else {
4405                 in_len = 0;
4406         }
4407
4408         ir_node *const in[1] = { res };
4409         ir_node *const store = get_store();
4410         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4411
4412         ir_node *end_block = get_irg_end_block(current_ir_graph);
4413         add_immBlock_pred(end_block, ret);
4414
4415         set_unreachable_now();
4416         return NULL;
4417 }
4418
4419 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4420 {
4421         if (!currently_reachable())
4422                 return NULL;
4423
4424         return expression_to_firm(statement->expression);
4425 }
4426
4427 static void create_local_declarations(entity_t*);
4428
4429 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4430 {
4431         create_local_declarations(compound->scope.entities);
4432
4433         ir_node     *result    = NULL;
4434         statement_t *statement = compound->statements;
4435         for ( ; statement != NULL; statement = statement->base.next) {
4436                 result = statement_to_firm(statement);
4437         }
4438
4439         return result;
4440 }
4441
4442 static void create_global_variable(entity_t *entity)
4443 {
4444         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4445         ir_visibility       visibility = ir_visibility_external;
4446         storage_class_tag_t storage
4447                 = (storage_class_tag_t)entity->declaration.storage_class;
4448         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4449         assert(entity->kind == ENTITY_VARIABLE);
4450
4451         switch (storage) {
4452         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4453         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4454         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4455         case STORAGE_CLASS_TYPEDEF:
4456         case STORAGE_CLASS_AUTO:
4457         case STORAGE_CLASS_REGISTER:
4458                 panic("invalid storage class for global var");
4459         }
4460
4461         /* "common" symbols */
4462         if (storage == STORAGE_CLASS_NONE
4463             && entity->variable.initializer == NULL
4464             && !entity->variable.thread_local
4465             && (modifiers & DM_WEAK) == 0) {
4466                 linkage |= IR_LINKAGE_MERGE;
4467         }
4468
4469         ir_type *var_type = get_glob_type();
4470         if (entity->variable.thread_local) {
4471                 var_type = get_tls_type();
4472         }
4473         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4474         ir_entity *irentity = entity->variable.v.entity;
4475         add_entity_linkage(irentity, linkage);
4476         set_entity_visibility(irentity, visibility);
4477         if (entity->variable.initializer == NULL
4478             && storage != STORAGE_CLASS_EXTERN) {
4479                 ir_initializer_t *null_init = get_initializer_null();
4480                 set_entity_initializer(irentity, null_init);
4481         }
4482 }
4483
4484 static void create_local_declaration(entity_t *entity)
4485 {
4486         assert(is_declaration(entity));
4487
4488         /* construct type */
4489         (void) get_ir_type(entity->declaration.type);
4490         if (entity->base.symbol == NULL) {
4491                 return;
4492         }
4493
4494         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4495         case STORAGE_CLASS_STATIC:
4496                 if (entity->kind == ENTITY_FUNCTION) {
4497                         (void)get_function_entity(entity, NULL);
4498                 } else {
4499                         create_local_static_variable(entity);
4500                 }
4501                 return;
4502         case STORAGE_CLASS_EXTERN:
4503                 if (entity->kind == ENTITY_FUNCTION) {
4504                         assert(entity->function.statement == NULL);
4505                         (void)get_function_entity(entity, NULL);
4506                 } else {
4507                         create_global_variable(entity);
4508                         create_variable_initializer(entity);
4509                 }
4510                 return;
4511         case STORAGE_CLASS_NONE:
4512         case STORAGE_CLASS_AUTO:
4513         case STORAGE_CLASS_REGISTER:
4514                 if (entity->kind == ENTITY_FUNCTION) {
4515                         if (entity->function.statement != NULL) {
4516                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4517                                 (void)get_function_entity(entity, owner);
4518                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4519                                 enqueue_inner_function(entity);
4520                         } else {
4521                                 (void)get_function_entity(entity, NULL);
4522                         }
4523                 } else {
4524                         create_local_variable(entity);
4525                 }
4526                 return;
4527         case STORAGE_CLASS_TYPEDEF:
4528                 break;
4529         }
4530         panic("invalid storage class found");
4531 }
4532
4533 static void create_local_declarations(entity_t *e)
4534 {
4535         for (; e; e = e->base.next) {
4536                 if (is_declaration(e))
4537                         create_local_declaration(e);
4538         }
4539 }
4540
4541 static void initialize_local_declaration(entity_t *entity)
4542 {
4543         if (entity->base.symbol == NULL)
4544                 return;
4545
4546         // no need to emit code in dead blocks
4547         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4548                         && !currently_reachable())
4549                 return;
4550
4551         switch ((declaration_kind_t) entity->declaration.kind) {
4552         case DECLARATION_KIND_LOCAL_VARIABLE:
4553         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4554                 create_variable_initializer(entity);
4555                 return;
4556
4557         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4558                 allocate_variable_length_array(entity);
4559                 return;
4560
4561         case DECLARATION_KIND_COMPOUND_MEMBER:
4562         case DECLARATION_KIND_GLOBAL_VARIABLE:
4563         case DECLARATION_KIND_FUNCTION:
4564         case DECLARATION_KIND_INNER_FUNCTION:
4565                 return;
4566
4567         case DECLARATION_KIND_PARAMETER:
4568         case DECLARATION_KIND_PARAMETER_ENTITY:
4569                 panic("can't initialize parameters");
4570
4571         case DECLARATION_KIND_UNKNOWN:
4572                 panic("can't initialize unknown declaration");
4573         }
4574         panic("invalid declaration kind");
4575 }
4576
4577 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4578 {
4579         entity_t *entity = statement->declarations_begin;
4580         if (entity == NULL)
4581                 return NULL;
4582
4583         entity_t *const last = statement->declarations_end;
4584         for ( ;; entity = entity->base.next) {
4585                 if (is_declaration(entity)) {
4586                         initialize_local_declaration(entity);
4587                 } else if (entity->kind == ENTITY_TYPEDEF) {
4588                         /* §6.7.7:3  Any array size expressions associated with variable length
4589                          * array declarators are evaluated each time the declaration of the
4590                          * typedef name is reached in the order of execution. */
4591                         type_t *const type = skip_typeref(entity->typedefe.type);
4592                         if (is_type_array(type) && type->array.is_vla)
4593                                 get_vla_size(&type->array);
4594                 }
4595                 if (entity == last)
4596                         break;
4597         }
4598
4599         return NULL;
4600 }
4601
4602 static ir_node *if_statement_to_firm(if_statement_t *statement)
4603 {
4604         create_local_declarations(statement->scope.entities);
4605
4606         /* Create the condition. */
4607         ir_node *true_block  = NULL;
4608         ir_node *false_block = NULL;
4609         if (currently_reachable()) {
4610                 true_block  = new_immBlock();
4611                 false_block = new_immBlock();
4612                 create_condition_evaluation(statement->condition, true_block, false_block);
4613                 mature_immBlock(true_block);
4614                 mature_immBlock(false_block);
4615         }
4616
4617         /* Create the true statement. */
4618         set_cur_block(true_block);
4619         statement_to_firm(statement->true_statement);
4620         ir_node *fallthrough_block = get_cur_block();
4621
4622         /* Create the false statement. */
4623         set_cur_block(false_block);
4624         if (statement->false_statement != NULL) {
4625                 statement_to_firm(statement->false_statement);
4626         }
4627
4628         /* Handle the block after the if-statement.  Minor simplification and
4629          * optimisation: Reuse the false/true block as fallthrough block, if the
4630          * true/false statement does not pass control to the fallthrough block, e.g.
4631          * in the typical if (x) return; pattern. */
4632         if (fallthrough_block) {
4633                 if (currently_reachable()) {
4634                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4635                         ir_node *const f_jump = new_Jmp();
4636                         ir_node *const in[]   = { t_jump, f_jump };
4637                         fallthrough_block = new_Block(2, in);
4638                 }
4639                 set_cur_block(fallthrough_block);
4640         }
4641
4642         return NULL;
4643 }
4644
4645 /**
4646  * Add an unconditional jump to the target block.  If the source block is not
4647  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4648  * loops.  This is necessary if the jump potentially enters a loop.
4649  */
4650 static void jump_to(ir_node *const target_block)
4651 {
4652         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4653         add_immBlock_pred(target_block, pred);
4654 }
4655
4656 /**
4657  * Add an unconditional jump to the target block, if the current block is
4658  * reachable and do nothing otherwise.  This is only valid if the jump does not
4659  * enter a loop (a back edge is ok).
4660  */
4661 static void jump_if_reachable(ir_node *const target_block)
4662 {
4663         if (currently_reachable())
4664                 add_immBlock_pred(target_block, new_Jmp());
4665 }
4666
4667 static ir_node *while_statement_to_firm(while_statement_t *statement)
4668 {
4669         create_local_declarations(statement->scope.entities);
4670
4671         /* Create the header block */
4672         ir_node *const header_block = new_immBlock();
4673         jump_to(header_block);
4674
4675         /* Create the condition. */
4676         ir_node      *      body_block;
4677         ir_node      *      false_block;
4678         expression_t *const cond = statement->condition;
4679         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4680                         fold_constant_to_bool(cond)) {
4681                 /* Shortcut for while (true). */
4682                 body_block  = header_block;
4683                 false_block = NULL;
4684
4685                 keep_alive(header_block);
4686                 keep_all_memory(header_block);
4687         } else {
4688                 body_block  = new_immBlock();
4689                 false_block = new_immBlock();
4690
4691                 set_cur_block(header_block);
4692                 create_condition_evaluation(cond, body_block, false_block);
4693                 mature_immBlock(body_block);
4694         }
4695
4696         ir_node *const old_continue_label = continue_label;
4697         ir_node *const old_break_label    = break_label;
4698         continue_label = header_block;
4699         break_label    = false_block;
4700
4701         /* Create the loop body. */
4702         set_cur_block(body_block);
4703         statement_to_firm(statement->body);
4704         jump_if_reachable(header_block);
4705
4706         mature_immBlock(header_block);
4707         assert(false_block == NULL || false_block == break_label);
4708         false_block = break_label;
4709         if (false_block != NULL) {
4710                 mature_immBlock(false_block);
4711         }
4712         set_cur_block(false_block);
4713
4714         assert(continue_label == header_block);
4715         continue_label = old_continue_label;
4716         break_label    = old_break_label;
4717         return NULL;
4718 }
4719
4720 static ir_node *get_break_label(void)
4721 {
4722         if (break_label == NULL) {
4723                 break_label = new_immBlock();
4724         }
4725         return break_label;
4726 }
4727
4728 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4729 {
4730         create_local_declarations(statement->scope.entities);
4731
4732         /* create the header block */
4733         ir_node *header_block = new_immBlock();
4734
4735         /* the loop body */
4736         ir_node *body_block = new_immBlock();
4737         jump_to(body_block);
4738
4739         ir_node *old_continue_label = continue_label;
4740         ir_node *old_break_label    = break_label;
4741         continue_label              = header_block;
4742         break_label                 = NULL;
4743
4744         set_cur_block(body_block);
4745         statement_to_firm(statement->body);
4746         ir_node *const false_block = get_break_label();
4747
4748         assert(continue_label == header_block);
4749         continue_label = old_continue_label;
4750         break_label    = old_break_label;
4751
4752         jump_if_reachable(header_block);
4753
4754         /* create the condition */
4755         mature_immBlock(header_block);
4756         set_cur_block(header_block);
4757
4758         create_condition_evaluation(statement->condition, body_block, false_block);
4759         mature_immBlock(body_block);
4760         mature_immBlock(false_block);
4761
4762         set_cur_block(false_block);
4763         return NULL;
4764 }
4765
4766 static ir_node *for_statement_to_firm(for_statement_t *statement)
4767 {
4768         create_local_declarations(statement->scope.entities);
4769
4770         if (currently_reachable()) {
4771                 entity_t *entity = statement->scope.entities;
4772                 for ( ; entity != NULL; entity = entity->base.next) {
4773                         if (!is_declaration(entity))
4774                                 continue;
4775
4776                         initialize_local_declaration(entity);
4777                 }
4778
4779                 if (statement->initialisation != NULL) {
4780                         expression_to_firm(statement->initialisation);
4781                 }
4782         }
4783
4784         /* Create the header block */
4785         ir_node *const header_block = new_immBlock();
4786         jump_to(header_block);
4787
4788         /* Create the condition. */
4789         ir_node *body_block;
4790         ir_node *false_block;
4791         if (statement->condition != NULL) {
4792                 body_block  = new_immBlock();
4793                 false_block = new_immBlock();
4794
4795                 set_cur_block(header_block);
4796                 create_condition_evaluation(statement->condition, body_block, false_block);
4797                 mature_immBlock(body_block);
4798         } else {
4799                 /* for-ever. */
4800                 body_block  = header_block;
4801                 false_block = NULL;
4802
4803                 keep_alive(header_block);
4804                 keep_all_memory(header_block);
4805         }
4806
4807         /* Create the step block, if necessary. */
4808         ir_node      *      step_block = header_block;
4809         expression_t *const step       = statement->step;
4810         if (step != NULL) {
4811                 step_block = new_immBlock();
4812         }
4813
4814         ir_node *const old_continue_label = continue_label;
4815         ir_node *const old_break_label    = break_label;
4816         continue_label = step_block;
4817         break_label    = false_block;
4818
4819         /* Create the loop body. */
4820         set_cur_block(body_block);
4821         statement_to_firm(statement->body);
4822         jump_if_reachable(step_block);
4823
4824         /* Create the step code. */
4825         if (step != NULL) {
4826                 mature_immBlock(step_block);
4827                 set_cur_block(step_block);
4828                 expression_to_firm(step);
4829                 jump_if_reachable(header_block);
4830         }
4831
4832         mature_immBlock(header_block);
4833         assert(false_block == NULL || false_block == break_label);
4834         false_block = break_label;
4835         if (false_block != NULL) {
4836                 mature_immBlock(false_block);
4837         }
4838         set_cur_block(false_block);
4839
4840         assert(continue_label == step_block);
4841         continue_label = old_continue_label;
4842         break_label    = old_break_label;
4843         return NULL;
4844 }
4845
4846 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4847 {
4848         if (!currently_reachable())
4849                 return NULL;
4850
4851         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4852         ir_node  *jump = new_d_Jmp(dbgi);
4853         add_immBlock_pred(target_block, jump);
4854
4855         set_unreachable_now();
4856         return NULL;
4857 }
4858
4859 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4860 {
4861         /* determine number of cases */
4862         size_t n_cases = 0;
4863         for (case_label_statement_t *l = statement->first_case; l != NULL;
4864              l = l->next) {
4865                 /* default case */
4866                 if (l->expression == NULL)
4867                         continue;
4868                 if (l->is_empty_range)
4869                         continue;
4870                 ++n_cases;
4871         }
4872
4873         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4874         size_t           i   = 0;
4875         for (case_label_statement_t *l = statement->first_case; l != NULL;
4876              l = l->next) {
4877             if (l->expression == NULL) {
4878                         l->pn = pn_Switch_default;
4879                         continue;
4880                 }
4881                 if (l->is_empty_range)
4882                         continue;
4883                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4884                 ir_tarval *max = min;
4885                 long       pn  = (long) i+1;
4886                 if (l->end_range != NULL)
4887                         max = fold_constant_to_tarval(l->end_range);
4888                 ir_switch_table_set(res, i++, min, max, pn);
4889                 l->pn = pn;
4890         }
4891         return res;
4892 }
4893
4894 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4895 {
4896         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4897         ir_node  *switch_node = NULL;
4898
4899         if (currently_reachable()) {
4900                 ir_node *expression = expression_to_firm(statement->expression);
4901                 ir_switch_table *table = create_switch_table(statement);
4902                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4903
4904                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4905         }
4906
4907         set_unreachable_now();
4908
4909         ir_node *const old_switch            = current_switch;
4910         ir_node *const old_break_label       = break_label;
4911         const bool     old_saw_default_label = saw_default_label;
4912         saw_default_label                    = false;
4913         current_switch                       = switch_node;
4914         break_label                          = NULL;
4915
4916         statement_to_firm(statement->body);
4917
4918         if (currently_reachable()) {
4919                 add_immBlock_pred(get_break_label(), new_Jmp());
4920         }
4921
4922         if (!saw_default_label && switch_node) {
4923                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4924                 add_immBlock_pred(get_break_label(), proj);
4925         }
4926
4927         if (break_label != NULL) {
4928                 mature_immBlock(break_label);
4929         }
4930         set_cur_block(break_label);
4931
4932         assert(current_switch == switch_node);
4933         current_switch    = old_switch;
4934         break_label       = old_break_label;
4935         saw_default_label = old_saw_default_label;
4936         return NULL;
4937 }
4938
4939 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4940 {
4941         if (statement->is_empty_range)
4942                 return NULL;
4943
4944         if (current_switch != NULL) {
4945                 ir_node *block = new_immBlock();
4946                 /* Fallthrough from previous case */
4947                 jump_if_reachable(block);
4948
4949                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4950                 add_immBlock_pred(block, proj);
4951                 if (statement->expression == NULL)
4952                         saw_default_label = true;
4953
4954                 mature_immBlock(block);
4955                 set_cur_block(block);
4956         }
4957
4958         return statement_to_firm(statement->statement);
4959 }
4960
4961 static ir_node *label_to_firm(const label_statement_t *statement)
4962 {
4963         ir_node *block = get_label_block(statement->label);
4964         jump_to(block);
4965
4966         set_cur_block(block);
4967         keep_alive(block);
4968         keep_all_memory(block);
4969
4970         return statement_to_firm(statement->statement);
4971 }
4972
4973 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4974 {
4975         if (!currently_reachable())
4976                 return NULL;
4977
4978         ir_node  *const irn  = expression_to_firm(statement->expression);
4979         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4980         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
4981
4982         set_irn_link(ijmp, ijmp_list);
4983         ijmp_list = ijmp;
4984
4985         set_unreachable_now();
4986         return NULL;
4987 }
4988
4989 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4990 {
4991         bool needs_memory = false;
4992
4993         if (statement->is_volatile) {
4994                 needs_memory = true;
4995         }
4996
4997         size_t         n_clobbers = 0;
4998         asm_clobber_t *clobber    = statement->clobbers;
4999         for ( ; clobber != NULL; clobber = clobber->next) {
5000                 const char *clobber_str = clobber->clobber.begin;
5001
5002                 if (!be_is_valid_clobber(clobber_str)) {
5003                         errorf(&statement->base.source_position,
5004                                    "invalid clobber '%s' specified", clobber->clobber);
5005                         continue;
5006                 }
5007
5008                 if (streq(clobber_str, "memory")) {
5009                         needs_memory = true;
5010                         continue;
5011                 }
5012
5013                 ident *id = new_id_from_str(clobber_str);
5014                 obstack_ptr_grow(&asm_obst, id);
5015                 ++n_clobbers;
5016         }
5017         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5018         ident **clobbers = NULL;
5019         if (n_clobbers > 0) {
5020                 clobbers = obstack_finish(&asm_obst);
5021         }
5022
5023         size_t n_inputs  = 0;
5024         asm_argument_t *argument = statement->inputs;
5025         for ( ; argument != NULL; argument = argument->next)
5026                 n_inputs++;
5027         size_t n_outputs = 0;
5028         argument = statement->outputs;
5029         for ( ; argument != NULL; argument = argument->next)
5030                 n_outputs++;
5031
5032         unsigned next_pos = 0;
5033
5034         ir_node *ins[n_inputs + n_outputs + 1];
5035         size_t   in_size = 0;
5036
5037         ir_asm_constraint tmp_in_constraints[n_outputs];
5038
5039         const expression_t *out_exprs[n_outputs];
5040         ir_node            *out_addrs[n_outputs];
5041         size_t              out_size = 0;
5042
5043         argument = statement->outputs;
5044         for ( ; argument != NULL; argument = argument->next) {
5045                 const char *constraints = argument->constraints.begin;
5046                 asm_constraint_flags_t asm_flags
5047                         = be_parse_asm_constraints(constraints);
5048
5049                 {
5050                         source_position_t const *const pos = &statement->base.source_position;
5051                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5052                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5053                         }
5054                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5055                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5056                                 continue;
5057                         }
5058                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5059                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5060                                 continue;
5061                         }
5062                 }
5063
5064                 unsigned pos = next_pos++;
5065                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5066                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5067                         expression_t *expr = argument->expression;
5068                         ir_node      *addr = expression_to_addr(expr);
5069                         /* in+output, construct an artifical same_as constraint on the
5070                          * input */
5071                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5072                                 char     buf[64];
5073                                 ir_node *value = get_value_from_lvalue(expr, addr);
5074
5075                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5076
5077                                 ir_asm_constraint constraint;
5078                                 constraint.pos              = pos;
5079                                 constraint.constraint       = new_id_from_str(buf);
5080                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5081                                 tmp_in_constraints[in_size] = constraint;
5082                                 ins[in_size] = value;
5083
5084                                 ++in_size;
5085                         }
5086
5087                         out_exprs[out_size] = expr;
5088                         out_addrs[out_size] = addr;
5089                         ++out_size;
5090                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5091                         /* pure memory ops need no input (but we have to make sure we
5092                          * attach to the memory) */
5093                         assert(! (asm_flags &
5094                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5095                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5096                         needs_memory = true;
5097
5098                         /* we need to attach the address to the inputs */
5099                         expression_t *expr = argument->expression;
5100
5101                         ir_asm_constraint constraint;
5102                         constraint.pos              = pos;
5103                         constraint.constraint       = new_id_from_str(constraints);
5104                         constraint.mode             = mode_M;
5105                         tmp_in_constraints[in_size] = constraint;
5106
5107                         ins[in_size]          = expression_to_addr(expr);
5108                         ++in_size;
5109                         continue;
5110                 } else {
5111                         errorf(&statement->base.source_position,
5112                                "only modifiers but no place set in constraints '%s'",
5113                                constraints);
5114                         continue;
5115                 }
5116
5117                 ir_asm_constraint constraint;
5118                 constraint.pos        = pos;
5119                 constraint.constraint = new_id_from_str(constraints);
5120                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5121
5122                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5123         }
5124         assert(obstack_object_size(&asm_obst)
5125                         == out_size * sizeof(ir_asm_constraint));
5126         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5127
5128
5129         obstack_grow(&asm_obst, tmp_in_constraints,
5130                      in_size * sizeof(tmp_in_constraints[0]));
5131         /* find and count input and output arguments */
5132         argument = statement->inputs;
5133         for ( ; argument != NULL; argument = argument->next) {
5134                 const char *constraints = argument->constraints.begin;
5135                 asm_constraint_flags_t asm_flags
5136                         = be_parse_asm_constraints(constraints);
5137
5138                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5139                         errorf(&statement->base.source_position,
5140                                "some constraints in '%s' are not supported", constraints);
5141                         continue;
5142                 }
5143                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5144                         errorf(&statement->base.source_position,
5145                                "some constraints in '%s' are invalid", constraints);
5146                         continue;
5147                 }
5148                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5149                         errorf(&statement->base.source_position,
5150                                "write flag specified for input constraints '%s'",
5151                                constraints);
5152                         continue;
5153                 }
5154
5155                 ir_node *input;
5156                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5157                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5158                         /* we can treat this as "normal" input */
5159                         input = expression_to_firm(argument->expression);
5160                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5161                         /* pure memory ops need no input (but we have to make sure we
5162                          * attach to the memory) */
5163                         assert(! (asm_flags &
5164                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5165                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5166                         needs_memory = true;
5167                         input = expression_to_addr(argument->expression);
5168                 } else {
5169                         errorf(&statement->base.source_position,
5170                                "only modifiers but no place set in constraints '%s'",
5171                                constraints);
5172                         continue;
5173                 }
5174
5175                 ir_asm_constraint constraint;
5176                 constraint.pos        = next_pos++;
5177                 constraint.constraint = new_id_from_str(constraints);
5178                 constraint.mode       = get_irn_mode(input);
5179
5180                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5181                 ins[in_size++] = input;
5182         }
5183
5184         if (needs_memory) {
5185                 ir_asm_constraint constraint;
5186                 constraint.pos        = next_pos++;
5187                 constraint.constraint = new_id_from_str("");
5188                 constraint.mode       = mode_M;
5189
5190                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5191                 ins[in_size++] = get_store();
5192         }
5193
5194         assert(obstack_object_size(&asm_obst)
5195                         == in_size * sizeof(ir_asm_constraint));
5196         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5197
5198         /* create asm node */
5199         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5200
5201         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5202
5203         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5204                                   out_size, output_constraints,
5205                                   n_clobbers, clobbers, asm_text);
5206
5207         if (statement->is_volatile) {
5208                 set_irn_pinned(node, op_pin_state_pinned);
5209         } else {
5210                 set_irn_pinned(node, op_pin_state_floats);
5211         }
5212
5213         /* create output projs & connect them */
5214         if (needs_memory) {
5215                 ir_node *projm = new_Proj(node, mode_M, out_size);
5216                 set_store(projm);
5217         }
5218
5219         size_t i;
5220         for (i = 0; i < out_size; ++i) {
5221                 const expression_t *out_expr = out_exprs[i];
5222                 long                pn       = i;
5223                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5224                 ir_node            *proj     = new_Proj(node, mode, pn);
5225                 ir_node            *addr     = out_addrs[i];
5226
5227                 set_value_for_expression_addr(out_expr, proj, addr);
5228         }
5229
5230         return NULL;
5231 }
5232
5233 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5234 {
5235         statement_to_firm(statement->try_statement);
5236         source_position_t const *const pos = &statement->base.source_position;
5237         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5238         return NULL;
5239 }
5240
5241 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5242 {
5243         errorf(&statement->base.source_position, "__leave not supported yet");
5244         return NULL;
5245 }
5246
5247 /**
5248  * Transform a statement.
5249  */
5250 static ir_node *statement_to_firm(statement_t *const stmt)
5251 {
5252 #ifndef NDEBUG
5253         assert(!stmt->base.transformed);
5254         stmt->base.transformed = true;
5255 #endif
5256
5257         switch (stmt->kind) {
5258         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5259         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5260         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5261         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5262         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5263         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5264         case STATEMENT_EMPTY:         return NULL; /* nothing */
5265         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5266         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5267         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5268         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5269         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5270         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5271         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5272         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5273         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5274
5275         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5276         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5277         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5278
5279         case STATEMENT_ERROR: panic("error statement found");
5280         }
5281         panic("statement not implemented");
5282 }
5283
5284 static int count_local_variables(const entity_t *entity,
5285                                  const entity_t *const last)
5286 {
5287         int count = 0;
5288         entity_t const *const end = last != NULL ? last->base.next : NULL;
5289         for (; entity != end; entity = entity->base.next) {
5290                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5291                     !entity->variable.address_taken                                       &&
5292                     is_type_scalar(skip_typeref(entity->declaration.type)))
5293                         ++count;
5294         }
5295         return count;
5296 }
5297
5298 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5299 {
5300         int *const count = env;
5301
5302         switch (stmt->kind) {
5303         case STATEMENT_DECLARATION: {
5304                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5305                 *count += count_local_variables(decl_stmt->declarations_begin,
5306                                 decl_stmt->declarations_end);
5307                 break;
5308         }
5309
5310         case STATEMENT_FOR:
5311                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5312                 break;
5313
5314         default:
5315                 break;
5316         }
5317 }
5318
5319 /**
5320  * Return the number of local (alias free) variables used by a function.
5321  */
5322 static int get_function_n_local_vars(entity_t *entity)
5323 {
5324         const function_t *function = &entity->function;
5325         int count = 0;
5326
5327         /* count parameters */
5328         count += count_local_variables(function->parameters.entities, NULL);
5329
5330         /* count local variables declared in body */
5331         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5332         return count;
5333 }
5334
5335 /**
5336  * Build Firm code for the parameters of a function.
5337  */
5338 static void initialize_function_parameters(entity_t *entity)
5339 {
5340         assert(entity->kind == ENTITY_FUNCTION);
5341         ir_graph *irg             = current_ir_graph;
5342         ir_node  *args            = get_irg_args(irg);
5343         int       n               = 0;
5344         ir_type  *function_irtype;
5345
5346         if (entity->function.need_closure) {
5347                 /* add an extra parameter for the static link */
5348                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5349                 ++n;
5350
5351                 /* Matze: IMO this is wrong, nested functions should have an own
5352                  * type and not rely on strange parameters... */
5353                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5354         } else {
5355                 function_irtype = get_ir_type(entity->declaration.type);
5356         }
5357
5358
5359
5360         entity_t *parameter = entity->function.parameters.entities;
5361         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5362                 if (parameter->kind != ENTITY_PARAMETER)
5363                         continue;
5364
5365                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5366                 type_t *type = skip_typeref(parameter->declaration.type);
5367
5368                 assert(!is_type_array(type));
5369                 bool const needs_entity = parameter->variable.address_taken || is_type_compound(type);
5370
5371                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5372                 if (needs_entity) {
5373                         ir_type   *frame_type = get_irg_frame_type(irg);
5374                         ir_entity *param
5375                                 = new_parameter_entity(frame_type, n, param_irtype);
5376                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5377                         parameter->variable.v.entity = param;
5378                         continue;
5379                 }
5380
5381                 ir_mode *param_mode = get_type_mode(param_irtype);
5382                 long     pn         = n;
5383                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5384
5385                 ir_mode *mode = get_ir_mode_storage(type);
5386                 value = create_conv(NULL, value, mode);
5387                 value = do_strict_conv(NULL, value);
5388
5389                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5390                 parameter->variable.v.value_number = next_value_number_function;
5391                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5392                                         parameter);
5393                 ++next_value_number_function;
5394
5395                 set_value(parameter->variable.v.value_number, value);
5396         }
5397 }
5398
5399 /**
5400  * Handle additional decl modifiers for IR-graphs
5401  *
5402  * @param irg            the IR-graph
5403  * @param dec_modifiers  additional modifiers
5404  */
5405 static void handle_decl_modifier_irg(ir_graph *irg,
5406                                      decl_modifiers_t decl_modifiers)
5407 {
5408         if (decl_modifiers & DM_NAKED) {
5409                 /* TRUE if the declaration includes the Microsoft
5410                    __declspec(naked) specifier. */
5411                 add_irg_additional_properties(irg, mtp_property_naked);
5412         }
5413         if (decl_modifiers & DM_FORCEINLINE) {
5414                 /* TRUE if the declaration includes the
5415                    Microsoft __forceinline specifier. */
5416                 set_irg_inline_property(irg, irg_inline_forced);
5417         }
5418         if (decl_modifiers & DM_NOINLINE) {
5419                 /* TRUE if the declaration includes the Microsoft
5420                    __declspec(noinline) specifier. */
5421                 set_irg_inline_property(irg, irg_inline_forbidden);
5422         }
5423 }
5424
5425 static void add_function_pointer(ir_type *segment, ir_entity *method,
5426                                  const char *unique_template)
5427 {
5428         ir_type   *method_type  = get_entity_type(method);
5429         ir_type   *ptr_type     = new_type_pointer(method_type);
5430
5431         /* these entities don't really have a name but firm only allows
5432          * "" in ld_ident.
5433          * Note that we mustn't give these entities a name since for example
5434          * Mach-O doesn't allow them. */
5435         ident     *ide          = id_unique(unique_template);
5436         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5437         ir_graph  *irg          = get_const_code_irg();
5438         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5439                                                            method);
5440
5441         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5442         set_entity_compiler_generated(ptr, 1);
5443         set_entity_visibility(ptr, ir_visibility_private);
5444         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5445         set_atomic_ent_value(ptr, val);
5446 }
5447
5448 /**
5449  * Generate possible IJmp branches to a given label block.
5450  */
5451 static void gen_ijmp_branches(ir_node *block)
5452 {
5453         ir_node *ijmp;
5454         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5455                 add_immBlock_pred(block, ijmp);
5456         }
5457 }
5458
5459 /**
5460  * Create code for a function and all inner functions.
5461  *
5462  * @param entity  the function entity
5463  */
5464 static void create_function(entity_t *entity)
5465 {
5466         assert(entity->kind == ENTITY_FUNCTION);
5467         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5468
5469         if (entity->function.statement == NULL)
5470                 return;
5471
5472         inner_functions     = NULL;
5473         current_trampolines = NULL;
5474
5475         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5476                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5477                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5478         }
5479         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5480                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5481                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5482         }
5483
5484         current_function_entity = entity;
5485         current_function_name   = NULL;
5486         current_funcsig         = NULL;
5487
5488         assert(all_labels == NULL);
5489         all_labels = NEW_ARR_F(label_t *, 0);
5490         ijmp_list  = NULL;
5491
5492         int       n_local_vars = get_function_n_local_vars(entity);
5493         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5494         current_ir_graph = irg;
5495
5496         ir_graph *old_current_function = current_function;
5497         current_function = irg;
5498
5499         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5500         current_vararg_entity = NULL;
5501
5502         set_irg_fp_model(irg, firm_fp_model);
5503         tarval_enable_fp_ops(1);
5504         set_irn_dbg_info(get_irg_start_block(irg),
5505                          get_entity_dbg_info(function_entity));
5506
5507         /* set inline flags */
5508         if (entity->function.is_inline)
5509                 set_irg_inline_property(irg, irg_inline_recomended);
5510         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5511
5512         next_value_number_function = 0;
5513         initialize_function_parameters(entity);
5514         current_static_link = entity->function.static_link;
5515
5516         statement_to_firm(entity->function.statement);
5517
5518         ir_node *end_block = get_irg_end_block(irg);
5519
5520         /* do we have a return statement yet? */
5521         if (currently_reachable()) {
5522                 type_t *type = skip_typeref(entity->declaration.type);
5523                 assert(is_type_function(type));
5524                 type_t *const return_type = skip_typeref(type->function.return_type);
5525
5526                 ir_node *ret;
5527                 if (is_type_void(return_type)) {
5528                         ret = new_Return(get_store(), 0, NULL);
5529                 } else {
5530                         ir_mode *const mode = get_ir_mode_storage(return_type);
5531
5532                         ir_node *in[1];
5533                         /* §5.1.2.2.3 main implicitly returns 0 */
5534                         if (is_main(entity)) {
5535                                 in[0] = new_Const(get_mode_null(mode));
5536                         } else {
5537                                 in[0] = new_Unknown(mode);
5538                         }
5539                         ret = new_Return(get_store(), 1, in);
5540                 }
5541                 add_immBlock_pred(end_block, ret);
5542         }
5543
5544         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5545                 label_t *label = all_labels[i];
5546                 if (label->address_taken) {
5547                         gen_ijmp_branches(label->block);
5548                 }
5549                 mature_immBlock(label->block);
5550         }
5551
5552         DEL_ARR_F(all_labels);
5553         all_labels = NULL;
5554
5555         irg_finalize_cons(irg);
5556
5557         /* finalize the frame type */
5558         ir_type *frame_type = get_irg_frame_type(irg);
5559         int      n          = get_compound_n_members(frame_type);
5560         int      align_all  = 4;
5561         int      offset     = 0;
5562         for (int i = 0; i < n; ++i) {
5563                 ir_entity *member      = get_compound_member(frame_type, i);
5564                 ir_type   *entity_type = get_entity_type(member);
5565
5566                 int align = get_type_alignment_bytes(entity_type);
5567                 if (align > align_all)
5568                         align_all = align;
5569                 int misalign = 0;
5570                 if (align > 0) {
5571                         misalign  = offset % align;
5572                         if (misalign > 0) {
5573                                 offset += align - misalign;
5574                         }
5575                 }
5576
5577                 set_entity_offset(member, offset);
5578                 offset += get_type_size_bytes(entity_type);
5579         }
5580         set_type_size_bytes(frame_type, offset);
5581         set_type_alignment_bytes(frame_type, align_all);
5582
5583         irg_verify(irg, VERIFY_ENFORCE_SSA);
5584         current_vararg_entity = old_current_vararg_entity;
5585         current_function      = old_current_function;
5586
5587         if (current_trampolines != NULL) {
5588                 DEL_ARR_F(current_trampolines);
5589                 current_trampolines = NULL;
5590         }
5591
5592         /* create inner functions if any */
5593         entity_t **inner = inner_functions;
5594         if (inner != NULL) {
5595                 ir_type *rem_outer_frame      = current_outer_frame;
5596                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5597                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5598                         create_function(inner[i]);
5599                 }
5600                 DEL_ARR_F(inner);
5601
5602                 current_outer_frame      = rem_outer_frame;
5603         }
5604 }
5605
5606 static void scope_to_firm(scope_t *scope)
5607 {
5608         /* first pass: create declarations */
5609         entity_t *entity = scope->entities;
5610         for ( ; entity != NULL; entity = entity->base.next) {
5611                 if (entity->base.symbol == NULL)
5612                         continue;
5613
5614                 if (entity->kind == ENTITY_FUNCTION) {
5615                         if (entity->function.btk != BUILTIN_NONE) {
5616                                 /* builtins have no representation */
5617                                 continue;
5618                         }
5619                         (void)get_function_entity(entity, NULL);
5620                 } else if (entity->kind == ENTITY_VARIABLE) {
5621                         create_global_variable(entity);
5622                 } else if (entity->kind == ENTITY_NAMESPACE) {
5623                         scope_to_firm(&entity->namespacee.members);
5624                 }
5625         }
5626
5627         /* second pass: create code/initializers */
5628         entity = scope->entities;
5629         for ( ; entity != NULL; entity = entity->base.next) {
5630                 if (entity->base.symbol == NULL)
5631                         continue;
5632
5633                 if (entity->kind == ENTITY_FUNCTION) {
5634                         if (entity->function.btk != BUILTIN_NONE) {
5635                                 /* builtins have no representation */
5636                                 continue;
5637                         }
5638                         create_function(entity);
5639                 } else if (entity->kind == ENTITY_VARIABLE) {
5640                         assert(entity->declaration.kind
5641                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5642                         current_ir_graph = get_const_code_irg();
5643                         create_variable_initializer(entity);
5644                 }
5645         }
5646 }
5647
5648 void init_ast2firm(void)
5649 {
5650         obstack_init(&asm_obst);
5651         init_atomic_modes();
5652
5653         ir_set_debug_retrieve(dbg_retrieve);
5654         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5655
5656         /* create idents for all known runtime functions */
5657         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5658                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5659         }
5660
5661         entitymap_init(&entitymap);
5662 }
5663
5664 static void init_ir_types(void)
5665 {
5666         static int ir_types_initialized = 0;
5667         if (ir_types_initialized)
5668                 return;
5669         ir_types_initialized = 1;
5670
5671         ir_type_char       = get_ir_type(type_char);
5672         ir_type_const_char = get_ir_type(type_const_char);
5673         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5674
5675         be_params             = be_get_backend_param();
5676         mode_float_arithmetic = be_params->mode_float_arithmetic;
5677
5678         stack_param_align     = be_params->stack_param_align;
5679 }
5680
5681 void exit_ast2firm(void)
5682 {
5683         entitymap_destroy(&entitymap);
5684         obstack_free(&asm_obst, NULL);
5685 }
5686
5687 static void global_asm_to_firm(statement_t *s)
5688 {
5689         for (; s != NULL; s = s->base.next) {
5690                 assert(s->kind == STATEMENT_ASM);
5691
5692                 char const *const text = s->asms.asm_text.begin;
5693                 size_t            size = s->asms.asm_text.size;
5694
5695                 /* skip the last \0 */
5696                 if (text[size - 1] == '\0')
5697                         --size;
5698
5699                 ident *const id = new_id_from_chars(text, size);
5700                 add_irp_asm(id);
5701         }
5702 }
5703
5704 static const char *get_cwd(void)
5705 {
5706         static char buf[1024];
5707         if (buf[0] == '\0')
5708                 getcwd(buf, sizeof(buf));
5709         return buf;
5710 }
5711
5712 void translation_unit_to_firm(translation_unit_t *unit)
5713 {
5714         if (c_mode & _CXX) {
5715                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5716         } else if (c_mode & _C99) {
5717                 be_dwarf_set_source_language(DW_LANG_C99);
5718         } else if (c_mode & _C89) {
5719                 be_dwarf_set_source_language(DW_LANG_C89);
5720         } else {
5721                 be_dwarf_set_source_language(DW_LANG_C);
5722         }
5723         be_dwarf_set_compilation_directory(get_cwd());
5724
5725         /* initialize firm arithmetic */
5726         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5727         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5728
5729         /* just to be sure */
5730         continue_label           = NULL;
5731         break_label              = NULL;
5732         current_switch           = NULL;
5733         current_translation_unit = unit;
5734
5735         init_ir_types();
5736
5737         scope_to_firm(&unit->scope);
5738         global_asm_to_firm(unit->global_asm);
5739
5740         current_ir_graph         = NULL;
5741         current_translation_unit = NULL;
5742 }