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 <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/strutil.h"
  36 #include "adt/util.h"
  37 #include "symbol_t.h"
  38 #include "token_t.h"
  39 #include "type_t.h"
  40 #include "ast_t.h"
  41 #include "entity_t.h"
  42 #include "parser.h"
  43 #include "diagnostic.h"
  44 #include "lang_features.h"
  45 #include "types.h"
  46 #include "type_hash.h"
  47 #include "mangle.h"
  48 #include "walk.h"
  49 #include "warning.h"
  50 #include "printer.h"
  51 #include "entitymap_t.h"
  52 #include "driver/firm_opt.h"
  53
  54 typedef struct trampoline_region trampoline_region;
  55 struct trampoline_region {
  56         ir_entity        *function;    /**< The function that is called by this trampoline */
  57         ir_entity        *region;      /**< created region for the trampoline */
  58 };
  59
  60 fp_model_t firm_fp_model = fp_model_precise;
  61
  62 static const backend_params *be_params;
  63
  64 static ir_type *ir_type_char;
  65 static ir_type *ir_type_const_char;
  66 static ir_type *ir_type_wchar_t;
  67 static ir_type *ir_type_void;
  68 static ir_type *ir_type_int;
  69
  70 /* architecture specific floating point arithmetic mode (if any) */
  71 static ir_mode *mode_float_arithmetic;
  72
  73 /* alignment of stack parameters */
  74 static unsigned stack_param_align;
  75
  76 static int        next_value_number_function;
  77 static ir_node   *continue_label;
  78 static ir_node   *break_label;
  79 static ir_node   *current_switch;
  80 static bool       saw_default_label;
  81 static label_t  **all_labels;
  82 static entity_t **inner_functions;
  83 static ir_node   *ijmp_list;
  84 static bool       constant_folding;
  85
  86 static const entity_t     *current_function_entity;
  87 static ir_node            *current_function_name;
  88 static ir_node            *current_funcsig;
  89 static ir_graph           *current_function;
  90 static translation_unit_t *current_translation_unit;
  91 static trampoline_region  *current_trampolines;
  92 static ir_type            *current_outer_frame;
  93 static ir_node            *current_static_link;
  94 static ir_entity          *current_vararg_entity;
  95
  96 static entitymap_t  entitymap;
  97
  98 static struct obstack asm_obst;
  99
 100 typedef enum declaration_kind_t {
 101         DECLARATION_KIND_UNKNOWN,
 102         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 103         DECLARATION_KIND_GLOBAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 106         DECLARATION_KIND_PARAMETER,
 107         DECLARATION_KIND_PARAMETER_ENTITY,
 108         DECLARATION_KIND_FUNCTION,
 109         DECLARATION_KIND_COMPOUND_MEMBER,
 110         DECLARATION_KIND_INNER_FUNCTION
 111 } declaration_kind_t;
 112
 113 static ir_type *get_ir_type_incomplete(type_t *type);
 114
 115 static void enqueue_inner_function(entity_t *entity)
 116 {
 117         if (inner_functions == NULL)
 118                 inner_functions = NEW_ARR_F(entity_t *, 0);
 119         ARR_APP1(entity_t*, inner_functions, entity);
 120 }
 121
 122 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 123 {
 124         const entity_t *entity = get_irg_loc_description(irg, pos);
 125
 126         if (entity != NULL) {
 127                 source_position_t const *const pos = &entity->base.source_position;
 128                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 129         }
 130         return new_r_Unknown(irg, mode);
 131 }
 132
 133 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 134 {
 135         const source_position_t *pos = (const source_position_t*) dbg;
 136         if (pos == NULL)
 137                 return NULL;
 138         if (line != NULL)
 139                 *line = pos->lineno;
 140         return pos->input_name;
 141 }
 142
 143 static dbg_info *get_dbg_info(const source_position_t *pos)
 144 {
 145         return (dbg_info*) pos;
 146 }
 147
 148 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 149                                     const type_dbg_info *dbg)
 150 {
 151         assert(dbg != NULL);
 152         print_to_buffer(buffer, buffer_size);
 153         const type_t *type = (const type_t*) dbg;
 154         print_type(type);
 155         finish_print_to_buffer();
 156 }
 157
 158 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 159 {
 160         return (type_dbg_info*) type;
 161 }
 162
 163 /* is the current block a reachable one? */
 164 static bool currently_reachable(void)
 165 {
 166         ir_node *const block = get_cur_block();
 167         return block != NULL && !is_Bad(block);
 168 }
 169
 170 static void set_unreachable_now(void)
 171 {
 172         set_cur_block(NULL);
 173 }
 174
 175 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 176
 177 static ir_node *_expression_to_firm(const expression_t *expression);
 178 static ir_node *expression_to_firm(const expression_t *expression);
 179 static void create_local_declaration(entity_t *entity);
 180
 181 static unsigned decide_modulo_shift(unsigned type_size)
 182 {
 183         if (architecture_modulo_shift == 0)
 184                 return 0;
 185         if (type_size < architecture_modulo_shift)
 186                 return architecture_modulo_shift;
 187         return type_size;
 188 }
 189
 190 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 191 {
 192         unsigned flags = get_atomic_type_flags(kind);
 193         unsigned size  = get_atomic_type_size(kind);
 194         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 195             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 196                 if (size == 4) {
 197                         return get_modeF();
 198                 } else if (size == 8) {
 199                         return get_modeD();
 200                 } else {
 201                         panic("unexpected kind");
 202                 }
 203         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 204                 char            name[64];
 205                 unsigned        bit_size     = size * 8;
 206                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 207                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 208
 209                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 210                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 211                                     modulo_shift);
 212         }
 213
 214         return NULL;
 215 }
 216
 217 /**
 218  * Initialises the atomic modes depending on the machine size.
 219  */
 220 static void init_atomic_modes(void)
 221 {
 222         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 223         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 224                 if (atomic_modes[i] != NULL)
 225                         continue;
 226                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 227         }
 228 }
 229
 230 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 231 {
 232         assert(kind <= ATOMIC_TYPE_LAST);
 233         return atomic_modes[kind];
 234 }
 235
 236 static ir_node *get_vla_size(array_type_t *const type)
 237 {
 238         ir_node *size_node = type->size_node;
 239         if (size_node == NULL) {
 240                 size_node = expression_to_firm(type->size_expression);
 241                 type->size_node = size_node;
 242         }
 243         return size_node;
 244 }
 245
 246 static unsigned count_parameters(const function_type_t *function_type)
 247 {
 248         unsigned count = 0;
 249
 250         function_parameter_t *parameter = function_type->parameters;
 251         for ( ; parameter != NULL; parameter = parameter->next) {
 252                 ++count;
 253         }
 254
 255         return count;
 256 }
 257
 258 /**
 259  * Creates a Firm type for an atomic type
 260  */
 261 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 262 {
 263         ir_mode        *mode      = atomic_modes[akind];
 264         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 265         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 266         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 267
 268         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 269         set_type_alignment_bytes(irtype, alignment);
 270
 271         return irtype;
 272 }
 273
 274 /**
 275  * Creates a Firm type for a complex type
 276  */
 277 static ir_type *create_complex_type(const atomic_type_t *type)
 278 {
 279         atomic_type_kind_t  kind = type->akind;
 280         ir_mode            *mode = atomic_modes[kind];
 281         ident              *id   = get_mode_ident(mode);
 282
 283         (void) id;
 284
 285         /* FIXME: finish the array */
 286         return NULL;
 287 }
 288
 289 /**
 290  * Creates a Firm type for an imaginary type
 291  */
 292 static ir_type *create_imaginary_type(const atomic_type_t *type)
 293 {
 294         return create_atomic_type(type->akind, (const type_t*)type);
 295 }
 296
 297 /**
 298  * return type of a parameter (and take transparent union gnu extension into
 299  * account)
 300  */
 301 static type_t *get_parameter_type(type_t *orig_type)
 302 {
 303         type_t *type = skip_typeref(orig_type);
 304         if (is_type_union(type)
 305                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 306                 compound_t *compound = type->compound.compound;
 307                 type                 = compound->members.entities->declaration.type;
 308         }
 309
 310         return type;
 311 }
 312
 313 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 314 {
 315         type_t        *return_type  = skip_typeref(function_type->return_type);
 316
 317         int            n_parameters = count_parameters(function_type)
 318                                        + (for_closure ? 1 : 0);
 319         int            n_results    = return_type == type_void ? 0 : 1;
 320         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 321         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 322
 323         if (return_type != type_void) {
 324                 ir_type *restype = get_ir_type(return_type);
 325                 set_method_res_type(irtype, 0, restype);
 326         }
 327
 328         function_parameter_t *parameter = function_type->parameters;
 329         int                   n         = 0;
 330         if (for_closure) {
 331                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 332                 set_method_param_type(irtype, n, p_irtype);
 333                 ++n;
 334         }
 335         for ( ; parameter != NULL; parameter = parameter->next) {
 336                 type_t  *type     = get_parameter_type(parameter->type);
 337                 ir_type *p_irtype = get_ir_type(type);
 338                 set_method_param_type(irtype, n, p_irtype);
 339                 ++n;
 340         }
 341
 342         bool is_variadic = function_type->variadic;
 343
 344         if (is_variadic)
 345                 set_method_variadicity(irtype, variadicity_variadic);
 346
 347         unsigned cc = get_method_calling_convention(irtype);
 348         switch (function_type->calling_convention) {
 349         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 350         case CC_CDECL:
 351 is_cdecl:
 352                 set_method_calling_convention(irtype, SET_CDECL(cc));
 353                 break;
 354
 355         case CC_STDCALL:
 356                 if (is_variadic)
 357                         goto is_cdecl;
 358
 359                 /* only non-variadic function can use stdcall, else use cdecl */
 360                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 361                 break;
 362
 363         case CC_FASTCALL:
 364                 if (is_variadic)
 365                         goto is_cdecl;
 366                 /* only non-variadic function can use fastcall, else use cdecl */
 367                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 368                 break;
 369
 370         case CC_THISCALL:
 371                 /* Hmm, leave default, not accepted by the parser yet. */
 372                 break;
 373         }
 374
 375         if (for_closure)
 376                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 377
 378         const decl_modifiers_t modifiers = function_type->modifiers;
 379         if (modifiers & DM_CONST)
 380                 add_method_additional_properties(irtype, mtp_property_const);
 381         if (modifiers & DM_PURE)
 382                 add_method_additional_properties(irtype, mtp_property_pure);
 383         if (modifiers & DM_RETURNS_TWICE)
 384                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 385         if (modifiers & DM_NORETURN)
 386                 add_method_additional_properties(irtype, mtp_property_noreturn);
 387         if (modifiers & DM_NOTHROW)
 388                 add_method_additional_properties(irtype, mtp_property_nothrow);
 389         if (modifiers & DM_MALLOC)
 390                 add_method_additional_properties(irtype, mtp_property_malloc);
 391
 392         return irtype;
 393 }
 394
 395 static ir_type *create_pointer_type(pointer_type_t *type)
 396 {
 397         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 398         type_t        *points_to    = type->points_to;
 399         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 400         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 401
 402         return irtype;
 403 }
 404
 405 static ir_type *create_reference_type(reference_type_t *type)
 406 {
 407         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 408         type_t        *refers_to    = type->refers_to;
 409         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 410         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 411
 412         return irtype;
 413 }
 414
 415 static ir_type *create_array_type(array_type_t *type)
 416 {
 417         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 418         type_t        *element_type    = type->element_type;
 419         ir_type       *ir_element_type = get_ir_type(element_type);
 420         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 421
 422         const int align = get_type_alignment_bytes(ir_element_type);
 423         set_type_alignment_bytes(irtype, align);
 424
 425         if (type->size_constant) {
 426                 int n_elements = type->size;
 427
 428                 set_array_bounds_int(irtype, 0, 0, n_elements);
 429
 430                 size_t elemsize = get_type_size_bytes(ir_element_type);
 431                 if (elemsize % align > 0) {
 432                         elemsize += align - (elemsize % align);
 433                 }
 434                 set_type_size_bytes(irtype, n_elements * elemsize);
 435         } else {
 436                 set_array_lower_bound_int(irtype, 0, 0);
 437         }
 438         set_type_state(irtype, layout_fixed);
 439
 440         return irtype;
 441 }
 442
 443 /**
 444  * Return the signed integer type of size bits.
 445  *
 446  * @param size   the size
 447  */
 448 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 449                                                  unsigned size,
 450                                                                                                  const type_t *type)
 451 {
 452         static ir_mode *s_modes[64 + 1] = {NULL, };
 453         ir_type *res;
 454         ir_mode *mode;
 455
 456         if (size <= 0 || size > 64)
 457                 return NULL;
 458
 459         mode = s_modes[size];
 460         if (mode == NULL) {
 461                 char name[32];
 462
 463                 snprintf(name, sizeof(name), "bf_I%u", size);
 464                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 465                 s_modes[size] = mode;
 466         }
 467
 468         type_dbg_info *dbgi = get_type_dbg_info_(type);
 469         res                 = new_d_type_primitive(mode, dbgi);
 470         set_primitive_base_type(res, base_tp);
 471
 472         return res;
 473 }
 474
 475 /**
 476  * Return the unsigned integer type of size bits.
 477  *
 478  * @param size   the size
 479  */
 480 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 481                                                    unsigned size,
 482                                                                                                    const type_t *type)
 483 {
 484         static ir_mode *u_modes[64 + 1] = {NULL, };
 485         ir_type *res;
 486         ir_mode *mode;
 487
 488         if (size <= 0 || size > 64)
 489                 return NULL;
 490
 491         mode = u_modes[size];
 492         if (mode == NULL) {
 493                 char name[32];
 494
 495                 snprintf(name, sizeof(name), "bf_U%u", size);
 496                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 497                 u_modes[size] = mode;
 498         }
 499
 500         type_dbg_info *dbgi = get_type_dbg_info_(type);
 501         res = new_d_type_primitive(mode, dbgi);
 502         set_primitive_base_type(res, base_tp);
 503
 504         return res;
 505 }
 506
 507 static ir_type *create_bitfield_type(const entity_t *entity)
 508 {
 509         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 510         type_t *base = skip_typeref(entity->declaration.type);
 511         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 512         ir_type *irbase = get_ir_type(base);
 513
 514         unsigned bit_size = entity->compound_member.bit_size;
 515
 516         assert(!is_type_float(base));
 517         if (is_type_signed(base)) {
 518                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 519         } else {
 520                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 521         }
 522 }
 523
 524 #define INVALID_TYPE ((ir_type*)-1)
 525
 526 enum {
 527         COMPOUND_IS_STRUCT = false,
 528         COMPOUND_IS_UNION  = true
 529 };
 530
 531 /**
 532  * Construct firm type from ast struct type.
 533  */
 534 static ir_type *create_compound_type(compound_type_t *type,
 535                                      bool incomplete, bool is_union)
 536 {
 537         compound_t *compound = type->compound;
 538
 539         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 540                 return compound->irtype;
 541         }
 542
 543         symbol_t *type_symbol = compound->base.symbol;
 544         ident    *id;
 545         if (type_symbol != NULL) {
 546                 id = new_id_from_str(type_symbol->string);
 547         } else {
 548                 if (is_union) {
 549                         id = id_unique("__anonymous_union.%u");
 550                 } else {
 551                         id = id_unique("__anonymous_struct.%u");
 552                 }
 553         }
 554
 555         ir_type *irtype;
 556         if (is_union) {
 557                 irtype = new_type_union(id);
 558         } else {
 559                 irtype = new_type_struct(id);
 560         }
 561
 562         compound->irtype_complete = false;
 563         compound->irtype          = irtype;
 564
 565         if (incomplete)
 566                 return irtype;
 567
 568         if (is_union) {
 569                 layout_union_type(type);
 570         } else {
 571                 layout_struct_type(type);
 572         }
 573
 574         compound->irtype_complete = true;
 575
 576         entity_t *entry = compound->members.entities;
 577         for ( ; entry != NULL; entry = entry->base.next) {
 578                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 579                         continue;
 580
 581                 symbol_t *symbol     = entry->base.symbol;
 582                 type_t   *entry_type = entry->declaration.type;
 583                 ident    *ident;
 584                 if (symbol == NULL) {
 585                         /* anonymous bitfield member, skip */
 586                         if (entry->compound_member.bitfield)
 587                                 continue;
 588                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 589                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 590                         ident = id_unique("anon.%u");
 591                 } else {
 592                         ident = new_id_from_str(symbol->string);
 593                 }
 594
 595                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 596
 597                 ir_type *entry_irtype;
 598                 if (entry->compound_member.bitfield) {
 599                         entry_irtype = create_bitfield_type(entry);
 600                 } else {
 601                         entry_irtype = get_ir_type(entry_type);
 602                 }
 603                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 604
 605                 set_entity_offset(entity, entry->compound_member.offset);
 606                 set_entity_offset_bits_remainder(entity,
 607                                                  entry->compound_member.bit_offset);
 608
 609                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 610                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 611                 entry->compound_member.entity = entity;
 612         }
 613
 614         set_type_alignment_bytes(irtype, compound->alignment);
 615         set_type_size_bytes(irtype, compound->size);
 616         set_type_state(irtype, layout_fixed);
 617
 618         return irtype;
 619 }
 620
 621 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 622
 623 static void determine_enum_values(enum_type_t *const type)
 624 {
 625         ir_mode   *const mode    = atomic_modes[type->base.akind];
 626         ir_tarval *const one     = get_mode_one(mode);
 627         ir_tarval *      tv_next = get_mode_null(mode);
 628
 629         enum_t   *enume = type->enume;
 630         entity_t *entry = enume->base.next;
 631         for (; entry != NULL; entry = entry->base.next) {
 632                 if (entry->kind != ENTITY_ENUM_VALUE)
 633                         break;
 634
 635                 expression_t *const init = entry->enum_value.value;
 636                 if (init != NULL) {
 637                         tv_next = fold_constant_to_tarval(init);
 638                 }
 639                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 640                 entry->enum_value.tv = tv_next;
 641                 tv_next = tarval_add(tv_next, one);
 642         }
 643 }
 644
 645 static ir_type *create_enum_type(enum_type_t *const type)
 646 {
 647         return create_atomic_type(type->base.akind, (const type_t*) type);
 648 }
 649
 650 static ir_type *get_ir_type_incomplete(type_t *type)
 651 {
 652         assert(type != NULL);
 653         type = skip_typeref(type);
 654
 655         if (type->base.firm_type != NULL) {
 656                 assert(type->base.firm_type != INVALID_TYPE);
 657                 return type->base.firm_type;
 658         }
 659
 660         switch (type->kind) {
 661         case TYPE_COMPOUND_STRUCT:
 662                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 663         case TYPE_COMPOUND_UNION:
 664                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 665         default:
 666                 return get_ir_type(type);
 667         }
 668 }
 669
 670 ir_type *get_ir_type(type_t *type)
 671 {
 672         assert(type != NULL);
 673
 674         type = skip_typeref(type);
 675
 676         if (type->base.firm_type != NULL) {
 677                 assert(type->base.firm_type != INVALID_TYPE);
 678                 return type->base.firm_type;
 679         }
 680
 681         ir_type *firm_type = NULL;
 682         switch (type->kind) {
 683         case TYPE_ATOMIC:
 684                 firm_type = create_atomic_type(type->atomic.akind, type);
 685                 break;
 686         case TYPE_COMPLEX:
 687                 firm_type = create_complex_type(&type->atomic);
 688                 break;
 689         case TYPE_IMAGINARY:
 690                 firm_type = create_imaginary_type(&type->atomic);
 691                 break;
 692         case TYPE_FUNCTION:
 693                 firm_type = create_method_type(&type->function, false);
 694                 break;
 695         case TYPE_POINTER:
 696                 firm_type = create_pointer_type(&type->pointer);
 697                 break;
 698         case TYPE_REFERENCE:
 699                 firm_type = create_reference_type(&type->reference);
 700                 break;
 701         case TYPE_ARRAY:
 702                 firm_type = create_array_type(&type->array);
 703                 break;
 704         case TYPE_COMPOUND_STRUCT:
 705                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 706                 break;
 707         case TYPE_COMPOUND_UNION:
 708                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 709                 break;
 710         case TYPE_ENUM:
 711                 firm_type = create_enum_type(&type->enumt);
 712                 break;
 713
 714         case TYPE_ERROR:
 715         case TYPE_TYPEOF:
 716         case TYPE_TYPEDEF:
 717                 break;
 718         }
 719         if (firm_type == NULL)
 720                 panic("unknown type found");
 721
 722         type->base.firm_type = firm_type;
 723         return firm_type;
 724 }
 725
 726 static ir_mode *get_ir_mode_storage(type_t *type)
 727 {
 728         ir_type *irtype = get_ir_type(type);
 729
 730         /* firm doesn't report a mode for arrays somehow... */
 731         if (is_Array_type(irtype)) {
 732                 return mode_P_data;
 733         }
 734
 735         ir_mode *mode = get_type_mode(irtype);
 736         assert(mode != NULL);
 737         return mode;
 738 }
 739
 740 /*
 741  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 742  * int that it returns bigger modes for floating point on some platforms
 743  * (x87 internally does arithemtic with 80bits)
 744  */
 745 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 746 {
 747         ir_mode *mode = get_ir_mode_storage(type);
 748         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 749                 return mode_float_arithmetic;
 750         }
 751
 752         return mode;
 753 }
 754
 755 /**
 756  * Return a node representing the size of a type.
 757  */
 758 static ir_node *get_type_size_node(type_t *type)
 759 {
 760         unsigned size;
 761         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 762         type = skip_typeref(type);
 763
 764         if (is_type_array(type) && type->array.is_vla) {
 765                 ir_node *size_node = get_vla_size(&type->array);
 766                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 767                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 768                 return real_size;
 769         }
 770
 771         size = get_type_size(type);
 772         return new_Const_long(mode, size);
 773 }
 774
 775 /** Names of the runtime functions. */
 776 static const struct {
 777         int        id;           /**< the rts id */
 778         int        n_res;        /**< number of return values */
 779         const char *name;        /**< the name of the rts function */
 780         int        n_params;     /**< number of parameters */
 781         unsigned   flags;        /**< language flags */
 782 } rts_data[] = {
 783         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 784         { rts_abort,      0, "abort",        0, _C89 },
 785         { rts_alloca,     1, "alloca",       1, _ALL },
 786         { rts_abs,        1, "abs",          1, _C89 },
 787         { rts_labs,       1, "labs",         1, _C89 },
 788         { rts_llabs,      1, "llabs",        1, _C99 },
 789         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 790
 791         { rts_fabs,       1, "fabs",         1, _C89 },
 792         { rts_sqrt,       1, "sqrt",         1, _C89 },
 793         { rts_cbrt,       1, "cbrt",         1, _C99 },
 794         { rts_exp,        1, "exp",          1, _C89 },
 795         { rts_exp2,       1, "exp2",         1, _C89 },
 796         { rts_exp10,      1, "exp10",        1, _GNUC },
 797         { rts_log,        1, "log",          1, _C89 },
 798         { rts_log2,       1, "log2",         1, _C89 },
 799         { rts_log10,      1, "log10",        1, _C89 },
 800         { rts_pow,        1, "pow",          2, _C89 },
 801         { rts_sin,        1, "sin",          1, _C89 },
 802         { rts_cos,        1, "cos",          1, _C89 },
 803         { rts_tan,        1, "tan",          1, _C89 },
 804         { rts_asin,       1, "asin",         1, _C89 },
 805         { rts_acos,       1, "acos",         1, _C89 },
 806         { rts_atan,       1, "atan",         1, _C89 },
 807         { rts_sinh,       1, "sinh",         1, _C89 },
 808         { rts_cosh,       1, "cosh",         1, _C89 },
 809         { rts_tanh,       1, "tanh",         1, _C89 },
 810
 811         { rts_fabsf,      1, "fabsf",        1, _C99 },
 812         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 813         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 814         { rts_expf,       1, "expf",         1, _C99 },
 815         { rts_exp2f,      1, "exp2f",        1, _C99 },
 816         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 817         { rts_logf,       1, "logf",         1, _C99 },
 818         { rts_log2f,      1, "log2f",        1, _C99 },
 819         { rts_log10f,     1, "log10f",       1, _C99 },
 820         { rts_powf,       1, "powf",         2, _C99 },
 821         { rts_sinf,       1, "sinf",         1, _C99 },
 822         { rts_cosf,       1, "cosf",         1, _C99 },
 823         { rts_tanf,       1, "tanf",         1, _C99 },
 824         { rts_asinf,      1, "asinf",        1, _C99 },
 825         { rts_acosf,      1, "acosf",        1, _C99 },
 826         { rts_atanf,      1, "atanf",        1, _C99 },
 827         { rts_sinhf,      1, "sinhf",        1, _C99 },
 828         { rts_coshf,      1, "coshf",        1, _C99 },
 829         { rts_tanhf,      1, "tanhf",        1, _C99 },
 830
 831         { rts_fabsl,      1, "fabsl",        1, _C99 },
 832         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 833         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 834         { rts_expl,       1, "expl",         1, _C99 },
 835         { rts_exp2l,      1, "exp2l",        1, _C99 },
 836         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 837         { rts_logl,       1, "logl",         1, _C99 },
 838         { rts_log2l,      1, "log2l",        1, _C99 },
 839         { rts_log10l,     1, "log10l",       1, _C99 },
 840         { rts_powl,       1, "powl",         2, _C99 },
 841         { rts_sinl,       1, "sinl",         1, _C99 },
 842         { rts_cosl,       1, "cosl",         1, _C99 },
 843         { rts_tanl,       1, "tanl",         1, _C99 },
 844         { rts_asinl,      1, "asinl",        1, _C99 },
 845         { rts_acosl,      1, "acosl",        1, _C99 },
 846         { rts_atanl,      1, "atanl",        1, _C99 },
 847         { rts_sinhl,      1, "sinhl",        1, _C99 },
 848         { rts_coshl,      1, "coshl",        1, _C99 },
 849         { rts_tanhl,      1, "tanhl",        1, _C99 },
 850
 851         { rts_strcmp,     1, "strcmp",       2, _C89 },
 852         { rts_strncmp,    1, "strncmp",      3, _C89 },
 853         { rts_strcpy,     1, "strcpy",       2, _C89 },
 854         { rts_strlen,     1, "strlen",       1, _C89 },
 855         { rts_memcpy,     1, "memcpy",       3, _C89 },
 856         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 857         { rts_memmove,    1, "memmove",      3, _C89 },
 858         { rts_memset,     1, "memset",       3, _C89 },
 859         { rts_memcmp,     1, "memcmp",       3, _C89 },
 860 };
 861
 862 static ident *rts_idents[lengthof(rts_data)];
 863
 864 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 865
 866 void set_create_ld_ident(ident *(*func)(entity_t*))
 867 {
 868         create_ld_ident = func;
 869 }
 870
 871 /**
 872  * Handle GNU attributes for entities
 873  *
 874  * @param ent   the entity
 875  * @param decl  the routine declaration
 876  */
 877 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 878 {
 879         assert(is_declaration(entity));
 880         decl_modifiers_t modifiers = entity->declaration.modifiers;
 881
 882         if (is_method_entity(irentity)) {
 883                 if (modifiers & DM_PURE) {
 884                         set_entity_additional_properties(irentity, mtp_property_pure);
 885                 }
 886                 if (modifiers & DM_CONST) {
 887                         add_entity_additional_properties(irentity, mtp_property_const);
 888                 }
 889         }
 890         if (modifiers & DM_USED) {
 891                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 892         }
 893         if (modifiers & DM_WEAK) {
 894                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 895         }
 896 }
 897
 898 static bool is_main(entity_t *entity)
 899 {
 900         static symbol_t *sym_main = NULL;
 901         if (sym_main == NULL) {
 902                 sym_main = symbol_table_insert("main");
 903         }
 904
 905         if (entity->base.symbol != sym_main)
 906                 return false;
 907         /* must be in outermost scope */
 908         if (entity->base.parent_scope != &current_translation_unit->scope)
 909                 return false;
 910
 911         return true;
 912 }
 913
 914 /**
 915  * Creates an entity representing a function.
 916  *
 917  * @param entity       the function declaration/definition
 918  * @param owner_type   the owner type of this function, NULL
 919  *                     for global functions
 920  */
 921 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 922 {
 923         assert(entity->kind == ENTITY_FUNCTION);
 924         if (entity->function.irentity != NULL)
 925                 return entity->function.irentity;
 926
 927         switch (entity->function.btk) {
 928         case BUILTIN_NONE:
 929         case BUILTIN_LIBC:
 930         case BUILTIN_LIBC_CHECK:
 931                 break;
 932         default:
 933                 return NULL;
 934         }
 935
 936         if (is_main(entity)) {
 937                 /* force main to C linkage */
 938                 type_t *type = entity->declaration.type;
 939                 assert(is_type_function(type));
 940                 if (type->function.linkage != LINKAGE_C) {
 941                         type_t *new_type           = duplicate_type(type);
 942                         new_type->function.linkage = LINKAGE_C;
 943                         type                       = identify_new_type(new_type);
 944                         entity->declaration.type   = type;
 945                 }
 946         }
 947
 948         symbol_t *symbol = entity->base.symbol;
 949         ident    *id     = new_id_from_str(symbol->string);
 950
 951         /* already an entity defined? */
 952         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 953         bool const has_body = entity->function.statement != NULL;
 954         if (irentity != NULL) {
 955                 if (get_entity_visibility(irentity) == ir_visibility_external
 956                                 && has_body) {
 957                         set_entity_visibility(irentity, ir_visibility_default);
 958                 }
 959                 goto entity_created;
 960         }
 961
 962         ir_type *ir_type_method;
 963         if (entity->function.need_closure)
 964                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 965         else
 966                 ir_type_method = get_ir_type(entity->declaration.type);
 967
 968         bool nested_function = false;
 969         if (owner_type == NULL)
 970                 owner_type = get_glob_type();
 971         else
 972                 nested_function = true;
 973
 974         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 975         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 976
 977         ident *ld_id;
 978         if (nested_function)
 979                 ld_id = id_unique("inner.%u");
 980         else
 981                 ld_id = create_ld_ident(entity);
 982         set_entity_ld_ident(irentity, ld_id);
 983
 984         handle_decl_modifiers(irentity, entity);
 985
 986         if (! nested_function) {
 987                 /* static inline             => local
 988                  * extern inline             => local
 989                  * inline without definition => local
 990                  * inline with definition    => external_visible */
 991                 storage_class_tag_t const storage_class
 992                         = (storage_class_tag_t) entity->declaration.storage_class;
 993                 bool                const is_inline     = entity->function.is_inline;
 994
 995                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
 996                     set_entity_visibility(irentity, ir_visibility_default);
 997                 } else if (storage_class == STORAGE_CLASS_STATIC ||
 998                            (is_inline && has_body)) {
 999                     set_entity_visibility(irentity, ir_visibility_local);
1000                 } else if (has_body) {
1001                     set_entity_visibility(irentity, ir_visibility_default);
1002                 } else {
1003                     set_entity_visibility(irentity, ir_visibility_external);
1004                 }
1005         } else {
1006                 /* nested functions are always local */
1007                 set_entity_visibility(irentity, ir_visibility_local);
1008         }
1009
1010         /* We should check for file scope here, but as long as we compile C only
1011            this is not needed. */
1012         if (!freestanding && !has_body) {
1013                 /* check for a known runtime function */
1014                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1015                         if (id != rts_idents[i])
1016                                 continue;
1017
1018                         function_type_t *function_type
1019                                 = &entity->declaration.type->function;
1020                         /* rts_entities code can't handle a "wrong" number of parameters */
1021                         if (function_type->unspecified_parameters)
1022                                 continue;
1023
1024                         /* check number of parameters */
1025                         int n_params = count_parameters(function_type);
1026                         if (n_params != rts_data[i].n_params)
1027                                 continue;
1028
1029                         type_t *return_type = skip_typeref(function_type->return_type);
1030                         int     n_res       = return_type != type_void ? 1 : 0;
1031                         if (n_res != rts_data[i].n_res)
1032                                 continue;
1033
1034                         /* ignore those rts functions not necessary needed for current mode */
1035                         if ((c_mode & rts_data[i].flags) == 0)
1036                                 continue;
1037                         assert(rts_entities[rts_data[i].id] == NULL);
1038                         rts_entities[rts_data[i].id] = irentity;
1039                 }
1040         }
1041
1042         entitymap_insert(&entitymap, symbol, irentity);
1043
1044 entity_created:
1045         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1046         entity->function.irentity = irentity;
1047
1048         return irentity;
1049 }
1050
1051 /**
1052  * Creates a SymConst for a given entity.
1053  *
1054  * @param dbgi    debug info
1055  * @param entity  the entity
1056  */
1057 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1058 {
1059         assert(entity != NULL);
1060         union symconst_symbol sym;
1061         sym.entity_p = entity;
1062         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1063 }
1064
1065 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1066 {
1067         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1068 }
1069
1070 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1071                                    ir_mode *dest_mode)
1072 {
1073         if (is_Const(value)) {
1074                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1075         }
1076
1077         ir_node *cond       = new_d_Cond(dbgi, value);
1078         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1079         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1080         ir_node *tblock     = new_Block(1, &proj_true);
1081         ir_node *fblock     = new_Block(1, &proj_false);
1082         set_cur_block(tblock);
1083         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1084         ir_node *tjump  = new_Jmp();
1085         set_cur_block(fblock);
1086         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1087         ir_node *fjump  = new_Jmp();
1088
1089         ir_node *in[2]      = { tjump, fjump };
1090         ir_node *mergeblock = new_Block(2, in);
1091         set_cur_block(mergeblock);
1092         ir_node *phi_in[2]  = { const1, const0 };
1093         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1094         return phi;
1095 }
1096
1097 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1098 {
1099         ir_mode *value_mode = get_irn_mode(value);
1100
1101         if (value_mode == dest_mode)
1102                 return value;
1103
1104         if (dest_mode == mode_b) {
1105                 ir_node *zero = new_Const(get_mode_null(value_mode));
1106                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1107                 return cmp;
1108         } else if (value_mode == mode_b) {
1109                 return create_conv_from_b(dbgi, value, dest_mode);
1110         }
1111
1112         return new_d_Conv(dbgi, value, dest_mode);
1113 }
1114
1115 /**
1116  * Creates a SymConst node representing a wide string literal.
1117  *
1118  * @param literal   the wide string literal
1119  */
1120 static ir_node *wide_string_literal_to_firm(
1121                 const string_literal_expression_t *literal)
1122 {
1123         ir_type  *const global_type = get_glob_type();
1124         ir_type  *const elem_type   = ir_type_wchar_t;
1125         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1126         ir_type  *const type        = new_type_array(1, elem_type);
1127
1128         ident     *const id     = id_unique("str.%u");
1129         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1130         set_entity_ld_ident(entity, id);
1131         set_entity_visibility(entity, ir_visibility_private);
1132         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1133
1134         ir_mode      *const mode = get_type_mode(elem_type);
1135         const size_t        slen = wstrlen(&literal->value);
1136
1137         set_array_lower_bound_int(type, 0, 0);
1138         set_array_upper_bound_int(type, 0, slen);
1139         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1140         set_type_state(type, layout_fixed);
1141
1142         ir_initializer_t *initializer = create_initializer_compound(slen);
1143         const char              *p    = literal->value.begin;
1144         for (size_t i = 0; i < slen; ++i) {
1145                 assert(p < literal->value.begin + literal->value.size);
1146                 utf32             v   = read_utf8_char(&p);
1147                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1148                 ir_initializer_t *val = create_initializer_tarval(tv);
1149                 set_initializer_compound_value(initializer, i, val);
1150         }
1151         set_entity_initializer(entity, initializer);
1152
1153         return create_symconst(dbgi, entity);
1154 }
1155
1156 /**
1157  * Creates a SymConst node representing a string constant.
1158  *
1159  * @param src_pos    the source position of the string constant
1160  * @param id_prefix  a prefix for the name of the generated string constant
1161  * @param value      the value of the string constant
1162  */
1163 static ir_node *string_to_firm(const source_position_t *const src_pos,
1164                                const char *const id_prefix,
1165                                const string_t *const value)
1166 {
1167         ir_type  *const global_type = get_glob_type();
1168         dbg_info *const dbgi        = get_dbg_info(src_pos);
1169         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1170
1171         ident     *const id     = id_unique(id_prefix);
1172         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1173         set_entity_ld_ident(entity, id);
1174         set_entity_visibility(entity, ir_visibility_private);
1175         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1176
1177         ir_type *const elem_type = ir_type_const_char;
1178         ir_mode *const mode      = get_type_mode(elem_type);
1179
1180         const char* const string = value->begin;
1181         const size_t      slen   = value->size;
1182
1183         set_array_lower_bound_int(type, 0, 0);
1184         set_array_upper_bound_int(type, 0, slen);
1185         set_type_size_bytes(type, slen);
1186         set_type_state(type, layout_fixed);
1187
1188         ir_initializer_t *initializer = create_initializer_compound(slen);
1189         for (size_t i = 0; i < slen; ++i) {
1190                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1191                 ir_initializer_t *val = create_initializer_tarval(tv);
1192                 set_initializer_compound_value(initializer, i, val);
1193         }
1194         set_entity_initializer(entity, initializer);
1195
1196         return create_symconst(dbgi, entity);
1197 }
1198
1199 static bool try_create_integer(literal_expression_t *literal,
1200                                type_t *type, unsigned char base)
1201 {
1202         const char *string = literal->value.begin;
1203         size_t      size   = literal->value.size;
1204
1205         assert(type->kind == TYPE_ATOMIC);
1206         atomic_type_kind_t akind = type->atomic.akind;
1207
1208         ir_mode   *mode = atomic_modes[akind];
1209         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1210         if (tv == tarval_bad)
1211                 return false;
1212
1213         literal->base.type    = type;
1214         literal->target_value = tv;
1215         return true;
1216 }
1217
1218 static void create_integer_tarval(literal_expression_t *literal)
1219 {
1220         unsigned        us     = 0;
1221         unsigned        ls     = 0;
1222         const string_t *suffix = &literal->suffix;
1223         /* parse suffix */
1224         if (suffix->size > 0) {
1225                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1226                         if (*c == 'u' || *c == 'U') { ++us; }
1227                         if (*c == 'l' || *c == 'L') { ++ls; }
1228                 }
1229         }
1230
1231         unsigned base;
1232         switch (literal->base.kind) {
1233                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1234                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1235                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1236                 default: panic("invalid literal kind");
1237         }
1238
1239         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1240
1241         /* now try if the constant is small enough for some types */
1242         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1243         if (ls < 1) {
1244                 if (us == 0 && try_create_integer(literal, type_int, base))
1245                         goto finished;
1246                 if ((us == 1 || base != 10)
1247                                 && try_create_integer(literal, type_unsigned_int, base))
1248                         goto finished;
1249         }
1250         if (ls < 2) {
1251                 if (us == 0 && try_create_integer(literal, type_long, base))
1252                         goto finished;
1253                 if ((us == 1 || base != 10)
1254                                 && try_create_integer(literal, type_unsigned_long, base))
1255                         goto finished;
1256         }
1257         /* last try? then we should not report tarval_bad */
1258         if (us != 1 && base == 10)
1259                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1260         if (us == 0 && try_create_integer(literal, type_long_long, base))
1261                 goto finished;
1262
1263         /* last try */
1264         assert(us == 1 || base != 10);
1265         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1266         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1267         if (!res)
1268                 panic("internal error when parsing number literal");
1269
1270 finished:
1271         tarval_set_integer_overflow_mode(old_mode);
1272 }
1273
1274 void determine_literal_type(literal_expression_t *literal)
1275 {
1276         switch (literal->base.kind) {
1277         case EXPR_LITERAL_INTEGER:
1278         case EXPR_LITERAL_INTEGER_OCTAL:
1279         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1280                 create_integer_tarval(literal);
1281                 return;
1282         default:
1283                 break;
1284         }
1285 }
1286
1287 /**
1288  * Creates a Const node representing a constant.
1289  */
1290 static ir_node *literal_to_firm(const literal_expression_t *literal)
1291 {
1292         type_t     *type   = skip_typeref(literal->base.type);
1293         ir_mode    *mode   = get_ir_mode_storage(type);
1294         const char *string = literal->value.begin;
1295         size_t      size   = literal->value.size;
1296         ir_tarval  *tv;
1297
1298         switch (literal->base.kind) {
1299         case EXPR_LITERAL_WIDE_CHARACTER: {
1300                 utf32  v = read_utf8_char(&string);
1301                 char   buf[128];
1302                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1303
1304                 tv = new_tarval_from_str(buf, len, mode);
1305                 goto make_const;
1306         }
1307         case EXPR_LITERAL_CHARACTER: {
1308                 long long int v;
1309                 bool char_is_signed
1310                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1311                 if (size == 1 && char_is_signed) {
1312                         v = (signed char)string[0];
1313                 } else {
1314                         v = 0;
1315                         for (size_t i = 0; i < size; ++i) {
1316                                 v = (v << 8) | ((unsigned char)string[i]);
1317                         }
1318                 }
1319                 char   buf[128];
1320                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1321
1322                 tv = new_tarval_from_str(buf, len, mode);
1323                 goto make_const;
1324         }
1325         case EXPR_LITERAL_INTEGER:
1326         case EXPR_LITERAL_INTEGER_OCTAL:
1327         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1328                 assert(literal->target_value != NULL);
1329                 tv = literal->target_value;
1330                 goto make_const;
1331         case EXPR_LITERAL_FLOATINGPOINT:
1332                 tv = new_tarval_from_str(string, size, mode);
1333                 goto make_const;
1334         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1335                 char buffer[size + 2];
1336                 memcpy(buffer, "0x", 2);
1337                 memcpy(buffer+2, string, size);
1338                 tv = new_tarval_from_str(buffer, size+2, mode);
1339                 goto make_const;
1340         }
1341         case EXPR_LITERAL_BOOLEAN:
1342                 if (string[0] == 't') {
1343                         tv = get_mode_one(mode);
1344                 } else {
1345                         assert(string[0] == 'f');
1346                         tv = get_mode_null(mode);
1347                 }
1348                 goto make_const;
1349         case EXPR_LITERAL_MS_NOOP:
1350                 tv = get_mode_null(mode);
1351                 goto make_const;
1352         default:
1353                 break;
1354         }
1355         panic("Invalid literal kind found");
1356
1357 make_const: ;
1358         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1359         ir_node  *res        = new_d_Const(dbgi, tv);
1360         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1361         return create_conv(dbgi, res, mode_arith);
1362 }
1363
1364 /*
1365  * Allocate an area of size bytes aligned at alignment
1366  * at a frame type.
1367  */
1368 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1369 {
1370         static unsigned area_cnt = 0;
1371         char buf[32];
1372
1373         ir_type *tp = new_type_array(1, ir_type_char);
1374         set_array_bounds_int(tp, 0, 0, size);
1375         set_type_alignment_bytes(tp, alignment);
1376
1377         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1378         ident *name = new_id_from_str(buf);
1379         ir_entity *area = new_entity(frame_type, name, tp);
1380
1381         /* mark this entity as compiler generated */
1382         set_entity_compiler_generated(area, 1);
1383         return area;
1384 }
1385
1386 /**
1387  * Return a node representing a trampoline region
1388  * for a given function entity.
1389  *
1390  * @param dbgi    debug info
1391  * @param entity  the function entity
1392  */
1393 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1394 {
1395         ir_entity *region = NULL;
1396         int        i;
1397
1398         if (current_trampolines != NULL) {
1399                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1400                         if (current_trampolines[i].function == entity) {
1401                                 region = current_trampolines[i].region;
1402                                 break;
1403                         }
1404                 }
1405         } else {
1406                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1407         }
1408         ir_graph *irg = current_ir_graph;
1409         if (region == NULL) {
1410                 /* create a new region */
1411                 ir_type           *frame_tp = get_irg_frame_type(irg);
1412                 trampoline_region  reg;
1413                 reg.function = entity;
1414
1415                 reg.region   = alloc_trampoline(frame_tp,
1416                                                 be_params->trampoline_size,
1417                                                 be_params->trampoline_align);
1418                 ARR_APP1(trampoline_region, current_trampolines, reg);
1419                 region = reg.region;
1420         }
1421         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1422                                region);
1423 }
1424
1425 /**
1426  * Creates a trampoline for a function represented by an entity.
1427  *
1428  * @param dbgi    debug info
1429  * @param mode    the (reference) mode for the function address
1430  * @param entity  the function entity
1431  */
1432 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1433                                   ir_entity *entity)
1434 {
1435         assert(entity != NULL);
1436         ir_node *in[3];
1437         in[0] = get_trampoline_region(dbgi, entity);
1438         in[1] = create_symconst(dbgi, entity);
1439         in[2] = get_irg_frame(current_ir_graph);
1440
1441         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1442         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1443         return new_Proj(irn, mode, pn_Builtin_max+1);
1444 }
1445
1446 /**
1447  * Dereference an address.
1448  *
1449  * @param dbgi  debug info
1450  * @param type  the type of the dereferenced result (the points_to type)
1451  * @param addr  the address to dereference
1452  */
1453 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1454                                       ir_node *const addr)
1455 {
1456         type_t *skipped = skip_typeref(type);
1457         if (is_type_incomplete(skipped))
1458                 return addr;
1459
1460         ir_type *irtype = get_ir_type(skipped);
1461         if (is_compound_type(irtype)
1462             || is_Method_type(irtype)
1463             || is_Array_type(irtype)) {
1464                 return addr;
1465         }
1466
1467         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1468                                   ? cons_volatile : cons_none;
1469         ir_mode *const mode     = get_type_mode(irtype);
1470         ir_node *const memory   = get_store();
1471         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1472         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1473         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1474
1475         set_store(load_mem);
1476
1477         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1478         return create_conv(dbgi, load_res, mode_arithmetic);
1479 }
1480
1481 /**
1482  * Creates a strict Conv (to the node's mode) if necessary.
1483  *
1484  * @param dbgi  debug info
1485  * @param node  the node to strict conv
1486  */
1487 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1488 {
1489         ir_mode *mode = get_irn_mode(node);
1490
1491         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1492                 return node;
1493         if (!mode_is_float(mode))
1494                 return node;
1495
1496         /* check if there is already a Conv */
1497         if (is_Conv(node)) {
1498                 /* convert it into a strict Conv */
1499                 set_Conv_strict(node, 1);
1500                 return node;
1501         }
1502
1503         /* otherwise create a new one */
1504         return new_d_strictConv(dbgi, node, mode);
1505 }
1506
1507 /**
1508  * Returns the correct base address depending on whether it is a parameter or a
1509  * normal local variable.
1510  */
1511 static ir_node *get_local_frame(ir_entity *const ent)
1512 {
1513         ir_graph      *const irg   = current_ir_graph;
1514         const ir_type *const owner = get_entity_owner(ent);
1515         if (owner == current_outer_frame) {
1516                 assert(current_static_link != NULL);
1517                 return current_static_link;
1518         } else {
1519                 return get_irg_frame(irg);
1520         }
1521 }
1522
1523 /**
1524  * Keep all memory edges of the given block.
1525  */
1526 static void keep_all_memory(ir_node *block)
1527 {
1528         ir_node *old = get_cur_block();
1529
1530         set_cur_block(block);
1531         keep_alive(get_store());
1532         /* TODO: keep all memory edges from restricted pointers */
1533         set_cur_block(old);
1534 }
1535
1536 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1537 {
1538         entity_t *entity = ref->entity;
1539         if (entity->enum_value.tv == NULL) {
1540                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1541                 assert(type->kind == TYPE_ENUM);
1542                 determine_enum_values(&type->enumt);
1543         }
1544
1545         return new_Const(entity->enum_value.tv);
1546 }
1547
1548 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1549 {
1550         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1551         entity_t *entity = ref->entity;
1552         assert(is_declaration(entity));
1553         type_t   *type   = skip_typeref(entity->declaration.type);
1554
1555         /* make sure the type is constructed */
1556         (void) get_ir_type(type);
1557
1558         if (entity->kind == ENTITY_FUNCTION
1559             && entity->function.btk != BUILTIN_NONE) {
1560                 ir_entity *irentity = get_function_entity(entity, NULL);
1561                 /* for gcc compatibility we have to produce (dummy) addresses for some
1562                  * builtins which don't have entities */
1563                 if (irentity == NULL) {
1564                         source_position_t const *const pos = &ref->base.source_position;
1565                         symbol_t          const *const sym = ref->entity->base.symbol;
1566                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1567
1568                         /* simply create a NULL pointer */
1569                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1570                         ir_node  *res  = new_Const(get_mode_null(mode));
1571
1572                         return res;
1573                 }
1574         }
1575
1576         switch ((declaration_kind_t) entity->declaration.kind) {
1577         case DECLARATION_KIND_UNKNOWN:
1578                 break;
1579
1580         case DECLARATION_KIND_LOCAL_VARIABLE: {
1581                 ir_mode *const mode  = get_ir_mode_storage(type);
1582                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1583                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1584         }
1585         case DECLARATION_KIND_PARAMETER: {
1586                 ir_mode *const mode  = get_ir_mode_storage(type);
1587                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1588                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1589         }
1590         case DECLARATION_KIND_FUNCTION: {
1591                 return create_symconst(dbgi, entity->function.irentity);
1592         }
1593         case DECLARATION_KIND_INNER_FUNCTION: {
1594                 ir_mode *const mode = get_ir_mode_storage(type);
1595                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1596                         /* inner function not using the closure */
1597                         return create_symconst(dbgi, entity->function.irentity);
1598                 } else {
1599                         /* need trampoline here */
1600                         return create_trampoline(dbgi, mode, entity->function.irentity);
1601                 }
1602         }
1603         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1604                 const variable_t *variable = &entity->variable;
1605                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1606                 return deref_address(dbgi, variable->base.type, addr);
1607         }
1608
1609         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1610                 ir_entity *irentity = entity->variable.v.entity;
1611                 ir_node   *frame    = get_local_frame(irentity);
1612                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1613                 return deref_address(dbgi, entity->declaration.type, sel);
1614         }
1615         case DECLARATION_KIND_PARAMETER_ENTITY: {
1616                 ir_entity *irentity = entity->parameter.v.entity;
1617                 ir_node   *frame    = get_local_frame(irentity);
1618                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1619                 return deref_address(dbgi, entity->declaration.type, sel);
1620         }
1621
1622         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1623                 return entity->variable.v.vla_base;
1624
1625         case DECLARATION_KIND_COMPOUND_MEMBER:
1626                 panic("not implemented reference type");
1627         }
1628
1629         panic("reference to declaration with unknown type found");
1630 }
1631
1632 static ir_node *reference_addr(const reference_expression_t *ref)
1633 {
1634         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1635         entity_t *entity = ref->entity;
1636         assert(is_declaration(entity));
1637
1638         switch((declaration_kind_t) entity->declaration.kind) {
1639         case DECLARATION_KIND_UNKNOWN:
1640                 break;
1641         case DECLARATION_KIND_PARAMETER:
1642         case DECLARATION_KIND_LOCAL_VARIABLE:
1643                 /* you can store to a local variable (so we don't panic but return NULL
1644                  * as an indicator for no real address) */
1645                 return NULL;
1646         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1647                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1648                 return addr;
1649         }
1650         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1651                 ir_entity *irentity = entity->variable.v.entity;
1652                 ir_node   *frame    = get_local_frame(irentity);
1653                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1654
1655                 return sel;
1656         }
1657         case DECLARATION_KIND_PARAMETER_ENTITY: {
1658                 ir_entity *irentity = entity->parameter.v.entity;
1659                 ir_node   *frame    = get_local_frame(irentity);
1660                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1661
1662                 return sel;
1663         }
1664
1665         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1666                 return entity->variable.v.vla_base;
1667
1668         case DECLARATION_KIND_FUNCTION: {
1669                 return create_symconst(dbgi, entity->function.irentity);
1670         }
1671
1672         case DECLARATION_KIND_INNER_FUNCTION: {
1673                 type_t  *const type = skip_typeref(entity->declaration.type);
1674                 ir_mode *const mode = get_ir_mode_storage(type);
1675                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1676                         /* inner function not using the closure */
1677                         return create_symconst(dbgi, entity->function.irentity);
1678                 } else {
1679                         /* need trampoline here */
1680                         return create_trampoline(dbgi, mode, entity->function.irentity);
1681                 }
1682         }
1683
1684         case DECLARATION_KIND_COMPOUND_MEMBER:
1685                 panic("not implemented reference type");
1686         }
1687
1688         panic("reference to declaration with unknown type found");
1689 }
1690
1691 /**
1692  * Transform calls to builtin functions.
1693  */
1694 static ir_node *process_builtin_call(const call_expression_t *call)
1695 {
1696         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1697
1698         assert(call->function->kind == EXPR_REFERENCE);
1699         reference_expression_t *builtin = &call->function->reference;
1700
1701         type_t *expr_type = skip_typeref(builtin->base.type);
1702         assert(is_type_pointer(expr_type));
1703
1704         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1705
1706         switch (builtin->entity->function.btk) {
1707         case BUILTIN_NONE:
1708                 break;
1709         case BUILTIN_ALLOCA: {
1710                 expression_t *argument = call->arguments->expression;
1711                 ir_node      *size     = expression_to_firm(argument);
1712
1713                 ir_node *store  = get_store();
1714                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1715                                               stack_alloc);
1716                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1717                 set_store(proj_m);
1718                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1719
1720                 return res;
1721         }
1722         case BUILTIN_INF: {
1723                 type_t    *type = function_type->function.return_type;
1724                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1725                 ir_tarval *tv   = get_mode_infinite(mode);
1726                 ir_node   *res  = new_d_Const(dbgi, tv);
1727                 return res;
1728         }
1729         case BUILTIN_NAN: {
1730                 /* Ignore string for now... */
1731                 assert(is_type_function(function_type));
1732                 type_t    *type = function_type->function.return_type;
1733                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1734                 ir_tarval *tv   = get_mode_NAN(mode);
1735                 ir_node   *res  = new_d_Const(dbgi, tv);
1736                 return res;
1737         }
1738         case BUILTIN_EXPECT: {
1739                 expression_t *argument = call->arguments->expression;
1740                 return _expression_to_firm(argument);
1741         }
1742         case BUILTIN_VA_END:
1743                 /* evaluate the argument of va_end for its side effects */
1744                 _expression_to_firm(call->arguments->expression);
1745                 return NULL;
1746         case BUILTIN_OBJECT_SIZE: {
1747                 /* determine value of "type" */
1748                 expression_t *type_expression = call->arguments->next->expression;
1749                 long          type_val        = fold_constant_to_int(type_expression);
1750                 type_t       *type            = function_type->function.return_type;
1751                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1752                 /* just produce a "I don't know" result */
1753                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1754                                                 get_mode_minus_one(mode);
1755
1756                 return new_d_Const(dbgi, result);
1757         }
1758         case BUILTIN_ROTL: {
1759                 ir_node *val  = expression_to_firm(call->arguments->expression);
1760                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1761                 ir_mode *mode = get_irn_mode(val);
1762                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1763                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1764         }
1765         case BUILTIN_ROTR: {
1766                 ir_node *val  = expression_to_firm(call->arguments->expression);
1767                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1768                 ir_mode *mode = get_irn_mode(val);
1769                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1770                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1771                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1772                 return new_d_Rotl(dbgi, val, sub, mode);
1773         }
1774         case BUILTIN_FIRM:
1775                 break;
1776         case BUILTIN_LIBC:
1777         case BUILTIN_LIBC_CHECK:
1778                 panic("builtin did not produce an entity");
1779         }
1780         panic("invalid builtin found");
1781 }
1782
1783 /**
1784  * Transform a call expression.
1785  * Handles some special cases, like alloca() calls, which must be resolved
1786  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1787  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1788  * handled right...
1789  */
1790 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1791 {
1792         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1793         assert(currently_reachable());
1794
1795         expression_t   *function = call->function;
1796         ir_node        *callee   = NULL;
1797         bool            firm_builtin = false;
1798         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1799         if (function->kind == EXPR_REFERENCE) {
1800                 const reference_expression_t *ref    = &function->reference;
1801                 entity_t                     *entity = ref->entity;
1802
1803                 if (entity->kind == ENTITY_FUNCTION) {
1804                         builtin_kind_t builtin = entity->function.btk;
1805                         if (builtin == BUILTIN_FIRM) {
1806                                 firm_builtin = true;
1807                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1808                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1809                                    && builtin != BUILTIN_LIBC_CHECK) {
1810                                 return process_builtin_call(call);
1811                         }
1812                 }
1813         }
1814         if (!firm_builtin)
1815                 callee = expression_to_firm(function);
1816
1817         type_t *type = skip_typeref(function->base.type);
1818         assert(is_type_pointer(type));
1819         pointer_type_t *pointer_type = &type->pointer;
1820         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1821         assert(is_type_function(points_to));
1822         function_type_t *function_type = &points_to->function;
1823
1824         int      n_parameters    = 0;
1825         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1826         ir_type *new_method_type = NULL;
1827         if (function_type->variadic || function_type->unspecified_parameters) {
1828                 const call_argument_t *argument = call->arguments;
1829                 for ( ; argument != NULL; argument = argument->next) {
1830                         ++n_parameters;
1831                 }
1832
1833                 /* we need to construct a new method type matching the call
1834                  * arguments... */
1835                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1836                 int n_res       = get_method_n_ress(ir_method_type);
1837                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1838                 set_method_calling_convention(new_method_type,
1839                                get_method_calling_convention(ir_method_type));
1840                 set_method_additional_properties(new_method_type,
1841                                get_method_additional_properties(ir_method_type));
1842                 set_method_variadicity(new_method_type,
1843                                        get_method_variadicity(ir_method_type));
1844
1845                 for (int i = 0; i < n_res; ++i) {
1846                         set_method_res_type(new_method_type, i,
1847                                             get_method_res_type(ir_method_type, i));
1848                 }
1849                 argument = call->arguments;
1850                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1851                         expression_t *expression = argument->expression;
1852                         ir_type      *irtype     = get_ir_type(expression->base.type);
1853                         set_method_param_type(new_method_type, i, irtype);
1854                 }
1855                 ir_method_type = new_method_type;
1856         } else {
1857                 n_parameters = get_method_n_params(ir_method_type);
1858         }
1859
1860         ir_node *in[n_parameters];
1861
1862         const call_argument_t *argument = call->arguments;
1863         for (int n = 0; n < n_parameters; ++n) {
1864                 expression_t *expression = argument->expression;
1865                 ir_node      *arg_node   = expression_to_firm(expression);
1866
1867                 type_t *arg_type = skip_typeref(expression->base.type);
1868                 if (!is_type_compound(arg_type)) {
1869                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1870                         arg_node      = create_conv(dbgi, arg_node, mode);
1871                         arg_node      = do_strict_conv(dbgi, arg_node);
1872                 }
1873
1874                 in[n] = arg_node;
1875
1876                 argument = argument->next;
1877         }
1878
1879         ir_node *store;
1880         if (function_type->modifiers & DM_CONST) {
1881                 store = get_irg_no_mem(current_ir_graph);
1882         } else {
1883                 store = get_store();
1884         }
1885
1886         ir_node *node;
1887         type_t  *return_type = skip_typeref(function_type->return_type);
1888         ir_node *result      = NULL;
1889         if (firm_builtin) {
1890                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1891                                      ir_method_type);
1892                 if (! (function_type->modifiers & DM_CONST)) {
1893                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1894                         set_store(mem);
1895                 }
1896
1897                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1898                         assert(is_type_scalar(return_type));
1899                         ir_mode *mode = get_ir_mode_storage(return_type);
1900                         result = new_Proj(node, mode, pn_Builtin_max+1);
1901                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1902                         result              = create_conv(NULL, result, mode_arith);
1903                 }
1904         } else {
1905                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1906                 if (! (function_type->modifiers & DM_CONST)) {
1907                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1908                         set_store(mem);
1909                 }
1910
1911                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1912                         ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1913
1914                         if (is_type_scalar(return_type)) {
1915                                 ir_mode *mode       = get_ir_mode_storage(return_type);
1916                                 result              = new_Proj(resproj, mode, 0);
1917                                 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1918                                 result              = create_conv(NULL, result, mode_arith);
1919                         } else {
1920                                 ir_mode *mode = mode_P_data;
1921                                 result        = new_Proj(resproj, mode, 0);
1922                         }
1923                 }
1924         }
1925
1926         if (function_type->modifiers & DM_NORETURN) {
1927                 /* A dead end:  Keep the Call and the Block.  Also place all further
1928                  * nodes into a new and unreachable block. */
1929                 keep_alive(node);
1930                 keep_alive(get_cur_block());
1931                 ir_node *block = new_Block(0, NULL);
1932                 set_cur_block(block);
1933         }
1934
1935         return result;
1936 }
1937
1938 static ir_node *statement_to_firm(statement_t *statement);
1939 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1940
1941 static ir_node *expression_to_addr(const expression_t *expression);
1942 static ir_node *create_condition_evaluation(const expression_t *expression,
1943                                             ir_node *true_block,
1944                                             ir_node *false_block);
1945
1946 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1947                          ir_node *value)
1948 {
1949         if (!is_type_compound(type)) {
1950                 ir_mode *mode = get_ir_mode_storage(type);
1951                 value         = create_conv(dbgi, value, mode);
1952                 value         = do_strict_conv(dbgi, value);
1953         }
1954
1955         ir_node *memory = get_store();
1956
1957         if (is_type_scalar(type)) {
1958                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1959                                       ? cons_volatile : cons_none;
1960                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1961                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1962                 set_store(store_mem);
1963         } else {
1964                 ir_type *irtype    = get_ir_type(type);
1965                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1966                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1967                 set_store(copyb_mem);
1968         }
1969 }
1970
1971 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1972 {
1973         ir_tarval *all_one   = get_mode_all_one(mode);
1974         int        mode_size = get_mode_size_bits(mode);
1975         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1976
1977         assert(offset >= 0);
1978         assert(size   >= 0);
1979         assert(offset + size <= mode_size);
1980         if (size == mode_size) {
1981                 return all_one;
1982         }
1983
1984         long       shiftr    = get_mode_size_bits(mode) - size;
1985         long       shiftl    = offset;
1986         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1987         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1988         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1989         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1990
1991         return mask1;
1992 }
1993
1994 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1995                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1996                 bool need_return)
1997 {
1998         ir_type *entity_type = get_entity_type(entity);
1999         ir_type *base_type   = get_primitive_base_type(entity_type);
2000         ir_mode *mode        = get_type_mode(base_type);
2001         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
2002
2003         value = create_conv(dbgi, value, mode);
2004
2005         /* kill upper bits of value and shift to right position */
2006         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
2007         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
2008         unsigned  base_bits  = get_mode_size_bits(mode);
2009         unsigned  shiftwidth = base_bits - bitsize;
2010
2011         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
2012         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
2013
2014         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
2015         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
2016         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
2017
2018         /* load current value */
2019         ir_node   *mem             = get_store();
2020         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2021                                           set_volatile ? cons_volatile : cons_none);
2022         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2023         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2024         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2025         ir_tarval *inv_mask        = tarval_not(shift_mask);
2026         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2027         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2028
2029         /* construct new value and store */
2030         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2031         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2032                                          set_volatile ? cons_volatile : cons_none);
2033         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2034         set_store(store_mem);
2035
2036         if (!need_return)
2037                 return NULL;
2038
2039         ir_node *res_shr;
2040         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2041         if (mode_is_signed(mode)) {
2042                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2043         } else {
2044                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2045         }
2046         return res_shr;
2047 }
2048
2049 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2050                                          ir_node *addr)
2051 {
2052         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2053         entity_t *entity    = expression->compound_entry;
2054         type_t   *base_type = entity->declaration.type;
2055         ir_mode  *mode      = get_ir_mode_storage(base_type);
2056         ir_node  *mem       = get_store();
2057         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2058         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2059         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2060         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2061
2062         ir_mode  *amode     = mode;
2063         /* optimisation, since shifting in modes < machine_size is usually
2064          * less efficient */
2065         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2066                 amode = mode_uint;
2067         }
2068         unsigned amode_size = get_mode_size_bits(amode);
2069         load_res = create_conv(dbgi, load_res, amode);
2070
2071         set_store(load_mem);
2072
2073         /* kill upper bits */
2074         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2075         unsigned   bitoffset   = entity->compound_member.bit_offset;
2076         unsigned   bitsize     = entity->compound_member.bit_size;
2077         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2078         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2079         ir_node   *countl      = new_d_Const(dbgi, tvl);
2080         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2081
2082         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2083         assert(shift_bitsr <= amode_size);
2084         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2085         ir_node   *countr      = new_d_Const(dbgi, tvr);
2086         ir_node   *shiftr;
2087         if (mode_is_signed(mode)) {
2088                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2089         } else {
2090                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2091         }
2092
2093         type_t  *type    = expression->base.type;
2094         ir_mode *resmode = get_ir_mode_arithmetic(type);
2095         return create_conv(dbgi, shiftr, resmode);
2096 }
2097
2098 /* make sure the selected compound type is constructed */
2099 static void construct_select_compound(const select_expression_t *expression)
2100 {
2101         type_t *type = skip_typeref(expression->compound->base.type);
2102         if (is_type_pointer(type)) {
2103                 type = type->pointer.points_to;
2104         }
2105         (void) get_ir_type(type);
2106 }
2107
2108 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2109                                               ir_node *value, ir_node *addr)
2110 {
2111         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2112         type_t   *type = skip_typeref(expression->base.type);
2113
2114         if (!is_type_compound(type)) {
2115                 ir_mode  *mode = get_ir_mode_storage(type);
2116                 value          = create_conv(dbgi, value, mode);
2117                 value          = do_strict_conv(dbgi, value);
2118         }
2119
2120         if (expression->kind == EXPR_REFERENCE) {
2121                 const reference_expression_t *ref = &expression->reference;
2122
2123                 entity_t *entity = ref->entity;
2124                 assert(is_declaration(entity));
2125                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2126                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2127                         set_value(entity->variable.v.value_number, value);
2128                         return value;
2129                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2130                         set_value(entity->parameter.v.value_number, value);
2131                         return value;
2132                 }
2133         }
2134
2135         if (addr == NULL)
2136                 addr = expression_to_addr(expression);
2137         assert(addr != NULL);
2138
2139         if (expression->kind == EXPR_SELECT) {
2140                 const select_expression_t *select = &expression->select;
2141
2142                 construct_select_compound(select);
2143
2144                 entity_t *entity = select->compound_entry;
2145                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2146                 if (entity->compound_member.bitfield) {
2147                         ir_entity *irentity = entity->compound_member.entity;
2148                         bool       set_volatile
2149                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2150                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2151                                                        set_volatile, true);
2152                         return value;
2153                 }
2154         }
2155
2156         assign_value(dbgi, addr, type, value);
2157         return value;
2158 }
2159
2160 static void set_value_for_expression(const expression_t *expression,
2161                                      ir_node *value)
2162 {
2163         set_value_for_expression_addr(expression, value, NULL);
2164 }
2165
2166 static ir_node *get_value_from_lvalue(const expression_t *expression,
2167                                       ir_node *addr)
2168 {
2169         if (expression->kind == EXPR_REFERENCE) {
2170                 const reference_expression_t *ref = &expression->reference;
2171
2172                 entity_t *entity = ref->entity;
2173                 assert(entity->kind == ENTITY_VARIABLE
2174                                 || entity->kind == ENTITY_PARAMETER);
2175                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2176                 int value_number;
2177                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2178                         value_number = entity->variable.v.value_number;
2179                         assert(addr == NULL);
2180                         type_t  *type = skip_typeref(expression->base.type);
2181                         ir_mode *mode = get_ir_mode_storage(type);
2182                         ir_node *res  = get_value(value_number, mode);
2183                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2184                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2185                         value_number = entity->parameter.v.value_number;
2186                         assert(addr == NULL);
2187                         type_t  *type = skip_typeref(expression->base.type);
2188                         ir_mode *mode = get_ir_mode_storage(type);
2189                         ir_node *res  = get_value(value_number, mode);
2190                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2191                 }
2192         }
2193
2194         assert(addr != NULL);
2195         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2196
2197         ir_node *value;
2198         if (expression->kind == EXPR_SELECT &&
2199             expression->select.compound_entry->compound_member.bitfield) {
2200             construct_select_compound(&expression->select);
2201                 value = bitfield_extract_to_firm(&expression->select, addr);
2202         } else {
2203                 value = deref_address(dbgi, expression->base.type, addr);
2204         }
2205
2206         return value;
2207 }
2208
2209
2210 static ir_node *create_incdec(const unary_expression_t *expression)
2211 {
2212         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2213         const expression_t *value_expr = expression->value;
2214         ir_node            *addr       = expression_to_addr(value_expr);
2215         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2216
2217         type_t  *type = skip_typeref(expression->base.type);
2218         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2219
2220         ir_node *offset;
2221         if (is_type_pointer(type)) {
2222                 pointer_type_t *pointer_type = &type->pointer;
2223                 offset = get_type_size_node(pointer_type->points_to);
2224         } else {
2225                 assert(is_type_arithmetic(type));
2226                 offset = new_Const(get_mode_one(mode));
2227         }
2228
2229         ir_node *result;
2230         ir_node *store_value;
2231         switch(expression->base.kind) {
2232         case EXPR_UNARY_POSTFIX_INCREMENT:
2233                 result      = value;
2234                 store_value = new_d_Add(dbgi, value, offset, mode);
2235                 break;
2236         case EXPR_UNARY_POSTFIX_DECREMENT:
2237                 result      = value;
2238                 store_value = new_d_Sub(dbgi, value, offset, mode);
2239                 break;
2240         case EXPR_UNARY_PREFIX_INCREMENT:
2241                 result      = new_d_Add(dbgi, value, offset, mode);
2242                 store_value = result;
2243                 break;
2244         case EXPR_UNARY_PREFIX_DECREMENT:
2245                 result      = new_d_Sub(dbgi, value, offset, mode);
2246                 store_value = result;
2247                 break;
2248         default:
2249                 panic("no incdec expr in create_incdec");
2250         }
2251
2252         set_value_for_expression_addr(value_expr, store_value, addr);
2253
2254         return result;
2255 }
2256
2257 static bool is_local_variable(expression_t *expression)
2258 {
2259         if (expression->kind != EXPR_REFERENCE)
2260                 return false;
2261         reference_expression_t *ref_expr = &expression->reference;
2262         entity_t               *entity   = ref_expr->entity;
2263         if (entity->kind != ENTITY_VARIABLE)
2264                 return false;
2265         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2266         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2267 }
2268
2269 static ir_relation get_relation(const expression_kind_t kind)
2270 {
2271         switch(kind) {
2272         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2273         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2274         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2275         case EXPR_BINARY_ISLESS:
2276         case EXPR_BINARY_LESS:          return ir_relation_less;
2277         case EXPR_BINARY_ISLESSEQUAL:
2278         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2279         case EXPR_BINARY_ISGREATER:
2280         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2281         case EXPR_BINARY_ISGREATEREQUAL:
2282         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2283         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2284
2285         default:
2286                 break;
2287         }
2288         panic("trying to get pn_Cmp from non-comparison binexpr type");
2289 }
2290
2291 /**
2292  * Handle the assume optimizer hint: check if a Confirm
2293  * node can be created.
2294  *
2295  * @param dbi    debug info
2296  * @param expr   the IL assume expression
2297  *
2298  * we support here only some simple cases:
2299  *  - var rel const
2300  *  - const rel val
2301  *  - var rel var
2302  */
2303 static ir_node *handle_assume_compare(dbg_info *dbi,
2304                                       const binary_expression_t *expression)
2305 {
2306         expression_t *op1 = expression->left;
2307         expression_t *op2 = expression->right;
2308         entity_t     *var2, *var = NULL;
2309         ir_node      *res      = NULL;
2310         ir_relation   relation = get_relation(expression->base.kind);
2311
2312         if (is_local_variable(op1) && is_local_variable(op2)) {
2313                 var  = op1->reference.entity;
2314             var2 = op2->reference.entity;
2315
2316                 type_t  *const type = skip_typeref(var->declaration.type);
2317                 ir_mode *const mode = get_ir_mode_storage(type);
2318
2319                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2320                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2321
2322                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2323                 set_value(var2->variable.v.value_number, res);
2324
2325                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2326                 set_value(var->variable.v.value_number, res);
2327
2328                 return res;
2329         }
2330
2331         expression_t *con = NULL;
2332         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2333                 var = op1->reference.entity;
2334                 con = op2;
2335         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2336                 relation = get_inversed_relation(relation);
2337                 var = op2->reference.entity;
2338                 con = op1;
2339         }
2340
2341         if (var != NULL) {
2342                 type_t  *const type = skip_typeref(var->declaration.type);
2343                 ir_mode *const mode = get_ir_mode_storage(type);
2344
2345                 res = get_value(var->variable.v.value_number, mode);
2346                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2347                 set_value(var->variable.v.value_number, res);
2348         }
2349         return res;
2350 }
2351
2352 /**
2353  * Handle the assume optimizer hint.
2354  *
2355  * @param dbi    debug info
2356  * @param expr   the IL assume expression
2357  */
2358 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2359 {
2360         switch(expression->kind) {
2361         case EXPR_BINARY_EQUAL:
2362         case EXPR_BINARY_NOTEQUAL:
2363         case EXPR_BINARY_LESS:
2364         case EXPR_BINARY_LESSEQUAL:
2365         case EXPR_BINARY_GREATER:
2366         case EXPR_BINARY_GREATEREQUAL:
2367                 return handle_assume_compare(dbi, &expression->binary);
2368         default:
2369                 return NULL;
2370         }
2371 }
2372
2373 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2374                             type_t *from_type, type_t *type)
2375 {
2376         type = skip_typeref(type);
2377         if (type == type_void) {
2378                 /* make sure firm type is constructed */
2379                 (void) get_ir_type(type);
2380                 return NULL;
2381         }
2382         if (!is_type_scalar(type)) {
2383                 /* make sure firm type is constructed */
2384                 (void) get_ir_type(type);
2385                 return value_node;
2386         }
2387
2388         from_type     = skip_typeref(from_type);
2389         ir_mode *mode = get_ir_mode_storage(type);
2390         /* check for conversion from / to __based types */
2391         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2392                 const variable_t *from_var = from_type->pointer.base_variable;
2393                 const variable_t *to_var   = type->pointer.base_variable;
2394                 if (from_var != to_var) {
2395                         if (from_var != NULL) {
2396                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2397                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2398                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2399                         }
2400                         if (to_var != NULL) {
2401                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2402                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2403                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2404                         }
2405                 }
2406         }
2407
2408         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2409                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2410                  * convert to mode_b so we only get a 0/1 value */
2411                 value_node = create_conv(dbgi, value_node, mode_b);
2412         }
2413
2414         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2415         ir_node *node       = create_conv(dbgi, value_node, mode);
2416         node                = do_strict_conv(dbgi, node);
2417         node                = create_conv(dbgi, node, mode_arith);
2418
2419         return node;
2420 }
2421
2422 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2423 {
2424         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2425         type_t   *type = skip_typeref(expression->base.type);
2426
2427         const expression_t *value = expression->value;
2428
2429         switch(expression->base.kind) {
2430         case EXPR_UNARY_TAKE_ADDRESS:
2431                 return expression_to_addr(value);
2432
2433         case EXPR_UNARY_NEGATE: {
2434                 ir_node *value_node = expression_to_firm(value);
2435                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2436                 return new_d_Minus(dbgi, value_node, mode);
2437         }
2438         case EXPR_UNARY_PLUS:
2439                 return expression_to_firm(value);
2440         case EXPR_UNARY_BITWISE_NEGATE: {
2441                 ir_node *value_node = expression_to_firm(value);
2442                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2443                 return new_d_Not(dbgi, value_node, mode);
2444         }
2445         case EXPR_UNARY_NOT: {
2446                 ir_node *value_node = _expression_to_firm(value);
2447                 value_node          = create_conv(dbgi, value_node, mode_b);
2448                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2449                 return res;
2450         }
2451         case EXPR_UNARY_DEREFERENCE: {
2452                 ir_node *value_node = expression_to_firm(value);
2453                 type_t  *value_type = skip_typeref(value->base.type);
2454                 assert(is_type_pointer(value_type));
2455
2456                 /* check for __based */
2457                 const variable_t *const base_var = value_type->pointer.base_variable;
2458                 if (base_var != NULL) {
2459                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2460                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2461                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2462                 }
2463                 type_t  *points_to  = value_type->pointer.points_to;
2464                 return deref_address(dbgi, points_to, value_node);
2465         }
2466         case EXPR_UNARY_POSTFIX_INCREMENT:
2467         case EXPR_UNARY_POSTFIX_DECREMENT:
2468         case EXPR_UNARY_PREFIX_INCREMENT:
2469         case EXPR_UNARY_PREFIX_DECREMENT:
2470                 return create_incdec(expression);
2471         case EXPR_UNARY_CAST: {
2472                 ir_node *value_node = expression_to_firm(value);
2473                 type_t  *from_type  = value->base.type;
2474                 return create_cast(dbgi, value_node, from_type, type);
2475         }
2476         case EXPR_UNARY_ASSUME:
2477                 return handle_assume(dbgi, value);
2478
2479         default:
2480                 break;
2481         }
2482         panic("invalid UNEXPR type found");
2483 }
2484
2485 /**
2486  * produces a 0/1 depending of the value of a mode_b node
2487  */
2488 static ir_node *produce_condition_result(const expression_t *expression,
2489                                          ir_mode *mode, dbg_info *dbgi)
2490 {
2491         ir_node *const one_block  = new_immBlock();
2492         ir_node *const zero_block = new_immBlock();
2493         create_condition_evaluation(expression, one_block, zero_block);
2494         mature_immBlock(one_block);
2495         mature_immBlock(zero_block);
2496
2497         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2498         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2499         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2500         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2501         set_cur_block(block);
2502
2503         ir_node *const one   = new_Const(get_mode_one(mode));
2504         ir_node *const zero  = new_Const(get_mode_null(mode));
2505         ir_node *const in[2] = { one, zero };
2506         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2507
2508         return val;
2509 }
2510
2511 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2512                 ir_node *value, type_t *type)
2513 {
2514         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2515         assert(is_type_pointer(type));
2516         pointer_type_t *const pointer_type = &type->pointer;
2517         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2518         ir_node        *      elem_size    = get_type_size_node(points_to);
2519         elem_size                          = create_conv(dbgi, elem_size, mode);
2520         value                              = create_conv(dbgi, value,     mode);
2521         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2522         return mul;
2523 }
2524
2525 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2526                           ir_node *left, ir_node *right)
2527 {
2528         ir_mode  *mode;
2529         type_t   *type_left  = skip_typeref(expression->left->base.type);
2530         type_t   *type_right = skip_typeref(expression->right->base.type);
2531
2532         expression_kind_t kind = expression->base.kind;
2533
2534         switch (kind) {
2535         case EXPR_BINARY_SHIFTLEFT:
2536         case EXPR_BINARY_SHIFTRIGHT:
2537         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2538         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2539                 mode  = get_ir_mode_arithmetic(expression->base.type);
2540                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2541                 break;
2542
2543         case EXPR_BINARY_SUB:
2544                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2545                         const pointer_type_t *const ptr_type = &type_left->pointer;
2546
2547                         mode = get_ir_mode_arithmetic(expression->base.type);
2548                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2549                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2550                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2551                         ir_node *const no_mem    = new_NoMem();
2552                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2553                                                                                                    mode, op_pin_state_floats);
2554                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2555                 }
2556                 /* fallthrough */
2557         case EXPR_BINARY_SUB_ASSIGN:
2558                 if (is_type_pointer(type_left)) {
2559                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2560                         mode  = get_ir_mode_arithmetic(type_left);
2561                         break;
2562                 }
2563                 goto normal_node;
2564
2565         case EXPR_BINARY_ADD:
2566         case EXPR_BINARY_ADD_ASSIGN:
2567                 if (is_type_pointer(type_left)) {
2568                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2569                         mode  = get_ir_mode_arithmetic(type_left);
2570                         break;
2571                 } else if (is_type_pointer(type_right)) {
2572                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2573                         mode  = get_ir_mode_arithmetic(type_right);
2574                         break;
2575                 }
2576                 goto normal_node;
2577
2578         default:
2579 normal_node:
2580                 mode = get_ir_mode_arithmetic(type_right);
2581                 left = create_conv(dbgi, left, mode);
2582                 break;
2583         }
2584
2585         switch (kind) {
2586         case EXPR_BINARY_ADD_ASSIGN:
2587         case EXPR_BINARY_ADD:
2588                 return new_d_Add(dbgi, left, right, mode);
2589         case EXPR_BINARY_SUB_ASSIGN:
2590         case EXPR_BINARY_SUB:
2591                 return new_d_Sub(dbgi, left, right, mode);
2592         case EXPR_BINARY_MUL_ASSIGN:
2593         case EXPR_BINARY_MUL:
2594                 return new_d_Mul(dbgi, left, right, mode);
2595         case EXPR_BINARY_BITWISE_AND:
2596         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2597                 return new_d_And(dbgi, left, right, mode);
2598         case EXPR_BINARY_BITWISE_OR:
2599         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2600                 return new_d_Or(dbgi, left, right, mode);
2601         case EXPR_BINARY_BITWISE_XOR:
2602         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2603                 return new_d_Eor(dbgi, left, right, mode);
2604         case EXPR_BINARY_SHIFTLEFT:
2605         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2606                 return new_d_Shl(dbgi, left, right, mode);
2607         case EXPR_BINARY_SHIFTRIGHT:
2608         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2609                 if (mode_is_signed(mode)) {
2610                         return new_d_Shrs(dbgi, left, right, mode);
2611                 } else {
2612                         return new_d_Shr(dbgi, left, right, mode);
2613                 }
2614         case EXPR_BINARY_DIV:
2615         case EXPR_BINARY_DIV_ASSIGN: {
2616                 ir_node *pin = new_Pin(new_NoMem());
2617                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2618                                          op_pin_state_floats);
2619                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2620                 return res;
2621         }
2622         case EXPR_BINARY_MOD:
2623         case EXPR_BINARY_MOD_ASSIGN: {
2624                 ir_node *pin = new_Pin(new_NoMem());
2625                 assert(!mode_is_float(mode));
2626                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2627                                          op_pin_state_floats);
2628                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2629                 return res;
2630         }
2631         default:
2632                 panic("unexpected expression kind");
2633         }
2634 }
2635
2636 static ir_node *create_lazy_op(const binary_expression_t *expression)
2637 {
2638         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2639         type_t   *type = skip_typeref(expression->base.type);
2640         ir_mode  *mode = get_ir_mode_arithmetic(type);
2641
2642         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2643                 bool val = fold_constant_to_bool(expression->left);
2644                 expression_kind_t ekind = expression->base.kind;
2645                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2646                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2647                         if (!val) {
2648                                 return new_Const(get_mode_null(mode));
2649                         }
2650                 } else {
2651                         if (val) {
2652                                 return new_Const(get_mode_one(mode));
2653                         }
2654                 }
2655
2656                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2657                         bool valr = fold_constant_to_bool(expression->right);
2658                         return create_Const_from_bool(mode, valr);
2659                 }
2660
2661                 return produce_condition_result(expression->right, mode, dbgi);
2662         }
2663
2664         return produce_condition_result((const expression_t*) expression, mode,
2665                                         dbgi);
2666 }
2667
2668 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2669                                             ir_node *right, ir_mode *mode);
2670
2671 static ir_node *create_assign_binop(const binary_expression_t *expression)
2672 {
2673         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2674         const expression_t *left_expr = expression->left;
2675         type_t             *type      = skip_typeref(left_expr->base.type);
2676         ir_node            *right     = expression_to_firm(expression->right);
2677         ir_node            *left_addr = expression_to_addr(left_expr);
2678         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2679         ir_node            *result    = create_op(dbgi, expression, left, right);
2680
2681         result = create_cast(dbgi, result, expression->right->base.type, type);
2682         result = do_strict_conv(dbgi, result);
2683
2684         result = set_value_for_expression_addr(left_expr, result, left_addr);
2685
2686         if (!is_type_compound(type)) {
2687                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2688                 result = create_conv(dbgi, result, mode_arithmetic);
2689         }
2690         return result;
2691 }
2692
2693 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2694 {
2695         expression_kind_t kind = expression->base.kind;
2696
2697         switch(kind) {
2698         case EXPR_BINARY_EQUAL:
2699         case EXPR_BINARY_NOTEQUAL:
2700         case EXPR_BINARY_LESS:
2701         case EXPR_BINARY_LESSEQUAL:
2702         case EXPR_BINARY_GREATER:
2703         case EXPR_BINARY_GREATEREQUAL:
2704         case EXPR_BINARY_ISGREATER:
2705         case EXPR_BINARY_ISGREATEREQUAL:
2706         case EXPR_BINARY_ISLESS:
2707         case EXPR_BINARY_ISLESSEQUAL:
2708         case EXPR_BINARY_ISLESSGREATER:
2709         case EXPR_BINARY_ISUNORDERED: {
2710                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2711                 ir_node    *left     = expression_to_firm(expression->left);
2712                 ir_node    *right    = expression_to_firm(expression->right);
2713                 ir_relation relation = get_relation(kind);
2714                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2715                 return cmp;
2716         }
2717         case EXPR_BINARY_ASSIGN: {
2718                 ir_node *addr  = expression_to_addr(expression->left);
2719                 ir_node *right = expression_to_firm(expression->right);
2720                 ir_node *res
2721                         = set_value_for_expression_addr(expression->left, right, addr);
2722
2723                 type_t  *type            = skip_typeref(expression->base.type);
2724                 if (!is_type_compound(type)) {
2725                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2726                         res                      = create_conv(NULL, res, mode_arithmetic);
2727                 }
2728                 return res;
2729         }
2730         case EXPR_BINARY_ADD:
2731         case EXPR_BINARY_SUB:
2732         case EXPR_BINARY_MUL:
2733         case EXPR_BINARY_DIV:
2734         case EXPR_BINARY_MOD:
2735         case EXPR_BINARY_BITWISE_AND:
2736         case EXPR_BINARY_BITWISE_OR:
2737         case EXPR_BINARY_BITWISE_XOR:
2738         case EXPR_BINARY_SHIFTLEFT:
2739         case EXPR_BINARY_SHIFTRIGHT:
2740         {
2741                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2742                 ir_node  *left  = expression_to_firm(expression->left);
2743                 ir_node  *right = expression_to_firm(expression->right);
2744                 return create_op(dbgi, expression, left, right);
2745         }
2746         case EXPR_BINARY_LOGICAL_AND:
2747         case EXPR_BINARY_LOGICAL_OR:
2748                 return create_lazy_op(expression);
2749         case EXPR_BINARY_COMMA:
2750                 /* create side effects of left side */
2751                 (void) expression_to_firm(expression->left);
2752                 return _expression_to_firm(expression->right);
2753
2754         case EXPR_BINARY_ADD_ASSIGN:
2755         case EXPR_BINARY_SUB_ASSIGN:
2756         case EXPR_BINARY_MUL_ASSIGN:
2757         case EXPR_BINARY_MOD_ASSIGN:
2758         case EXPR_BINARY_DIV_ASSIGN:
2759         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2760         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2761         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2762         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2763         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2764                 return create_assign_binop(expression);
2765         default:
2766                 panic("TODO binexpr type");
2767         }
2768 }
2769
2770 static ir_node *array_access_addr(const array_access_expression_t *expression)
2771 {
2772         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2773         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2774         ir_node  *offset      = expression_to_firm(expression->index);
2775         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2776         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2777         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2778
2779         return result;
2780 }
2781
2782 static ir_node *array_access_to_firm(
2783                 const array_access_expression_t *expression)
2784 {
2785         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2786         ir_node  *addr   = array_access_addr(expression);
2787         type_t   *type   = revert_automatic_type_conversion(
2788                         (const expression_t*) expression);
2789         type             = skip_typeref(type);
2790
2791         return deref_address(dbgi, type, addr);
2792 }
2793
2794 static long get_offsetof_offset(const offsetof_expression_t *expression)
2795 {
2796         type_t *orig_type = expression->type;
2797         long    offset    = 0;
2798
2799         designator_t *designator = expression->designator;
2800         for ( ; designator != NULL; designator = designator->next) {
2801                 type_t *type = skip_typeref(orig_type);
2802                 /* be sure the type is constructed */
2803                 (void) get_ir_type(type);
2804
2805                 if (designator->symbol != NULL) {
2806                         assert(is_type_compound(type));
2807                         symbol_t *symbol = designator->symbol;
2808
2809                         compound_t *compound = type->compound.compound;
2810                         entity_t   *iter     = compound->members.entities;
2811                         for ( ; iter != NULL; iter = iter->base.next) {
2812                                 if (iter->base.symbol == symbol) {
2813                                         break;
2814                                 }
2815                         }
2816                         assert(iter != NULL);
2817
2818                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2819                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2820                         offset += get_entity_offset(iter->compound_member.entity);
2821
2822                         orig_type = iter->declaration.type;
2823                 } else {
2824                         expression_t *array_index = designator->array_index;
2825                         assert(designator->array_index != NULL);
2826                         assert(is_type_array(type));
2827
2828                         long index         = fold_constant_to_int(array_index);
2829                         ir_type *arr_type  = get_ir_type(type);
2830                         ir_type *elem_type = get_array_element_type(arr_type);
2831                         long     elem_size = get_type_size_bytes(elem_type);
2832
2833                         offset += index * elem_size;
2834
2835                         orig_type = type->array.element_type;
2836                 }
2837         }
2838
2839         return offset;
2840 }
2841
2842 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2843 {
2844         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2845         long       offset = get_offsetof_offset(expression);
2846         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2847         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2848
2849         return new_d_Const(dbgi, tv);
2850 }
2851
2852 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2853                                      ir_entity *entity, type_t *type);
2854 static ir_initializer_t *create_ir_initializer(
2855                 const initializer_t *initializer, type_t *type);
2856
2857 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2858                                             initializer_t *initializer,
2859                                             type_t *type)
2860 {
2861         /* create the ir_initializer */
2862         ir_graph *const old_current_ir_graph = current_ir_graph;
2863         current_ir_graph = get_const_code_irg();
2864
2865         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2866
2867         assert(current_ir_graph == get_const_code_irg());
2868         current_ir_graph = old_current_ir_graph;
2869
2870         ident     *const id          = id_unique("initializer.%u");
2871         ir_type   *const irtype      = get_ir_type(type);
2872         ir_type   *const global_type = get_glob_type();
2873         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2874         set_entity_ld_ident(entity, id);
2875         set_entity_visibility(entity, ir_visibility_private);
2876         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2877         set_entity_initializer(entity, irinitializer);
2878         return entity;
2879 }
2880
2881 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2882 {
2883         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2884         type_t        *type        = expression->type;
2885         initializer_t *initializer = expression->initializer;
2886
2887         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2888                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2889                 return create_symconst(dbgi, entity);
2890         } else {
2891                 /* create an entity on the stack */
2892                 ident   *const id     = id_unique("CompLit.%u");
2893                 ir_type *const irtype = get_ir_type(type);
2894                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2895
2896                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2897                 set_entity_ld_ident(entity, id);
2898
2899                 /* create initialisation code */
2900                 create_local_initializer(initializer, dbgi, entity, type);
2901
2902                 /* create a sel for the compound literal address */
2903                 ir_node *frame = get_irg_frame(current_ir_graph);
2904                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2905                 return sel;
2906         }
2907 }
2908
2909 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2910 {
2911         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2912         type_t   *const type = expr->type;
2913         ir_node  *const addr = compound_literal_addr(expr);
2914         return deref_address(dbgi, type, addr);
2915 }
2916
2917 /**
2918  * Transform a sizeof expression into Firm code.
2919  */
2920 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2921 {
2922         type_t *const type = skip_typeref(expression->type);
2923         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2924         if (is_type_array(type) && type->array.is_vla
2925                         && expression->tp_expression != NULL) {
2926                 expression_to_firm(expression->tp_expression);
2927         }
2928         /* strange gnu extensions: sizeof(function) == 1 */
2929         if (is_type_function(type)) {
2930                 ir_mode *mode = get_ir_mode_storage(type_size_t);
2931                 return new_Const(get_mode_one(mode));
2932         }
2933
2934         return get_type_size_node(type);
2935 }
2936
2937 static entity_t *get_expression_entity(const expression_t *expression)
2938 {
2939         if (expression->kind != EXPR_REFERENCE)
2940                 return NULL;
2941
2942         return expression->reference.entity;
2943 }
2944
2945 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2946 {
2947         switch(entity->kind) {
2948         case DECLARATION_KIND_CASES:
2949                 return entity->declaration.alignment;
2950         case ENTITY_STRUCT:
2951         case ENTITY_UNION:
2952                 return entity->compound.alignment;
2953         case ENTITY_TYPEDEF:
2954                 return entity->typedefe.alignment;
2955         default:
2956                 break;
2957         }
2958         return 0;
2959 }
2960
2961 /**
2962  * Transform an alignof expression into Firm code.
2963  */
2964 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2965 {
2966         unsigned alignment = 0;
2967
2968         const expression_t *tp_expression = expression->tp_expression;
2969         if (tp_expression != NULL) {
2970                 entity_t *entity = get_expression_entity(tp_expression);
2971                 if (entity != NULL) {
2972                         if (entity->kind == ENTITY_FUNCTION) {
2973                                 /* a gnu-extension */
2974                                 alignment = 1;
2975                         } else {
2976                                 alignment = get_cparser_entity_alignment(entity);
2977                         }
2978                 }
2979         }
2980
2981         if (alignment == 0) {
2982                 type_t *type = expression->type;
2983                 alignment = get_type_alignment(type);
2984         }
2985
2986         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2987         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2988         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2989         return new_d_Const(dbgi, tv);
2990 }
2991
2992 static void init_ir_types(void);
2993
2994 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2995 {
2996         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2997
2998         bool constant_folding_old = constant_folding;
2999         constant_folding = true;
3000         int old_optimize         = get_optimize();
3001         int old_constant_folding = get_opt_constant_folding();
3002         set_optimize(1);
3003         set_opt_constant_folding(1);
3004
3005         init_ir_types();
3006
3007         ir_graph *old_current_ir_graph = current_ir_graph;
3008         current_ir_graph = get_const_code_irg();
3009
3010         ir_node *cnst = expression_to_firm(expression);
3011         current_ir_graph = old_current_ir_graph;
3012         set_optimize(old_optimize);
3013         set_opt_constant_folding(old_constant_folding);
3014
3015         if (!is_Const(cnst)) {
3016                 panic("couldn't fold constant");
3017         }
3018
3019         constant_folding = constant_folding_old;
3020
3021         return get_Const_tarval(cnst);
3022 }
3023
3024 /* this function is only used in parser.c, but it relies on libfirm functionality */
3025 bool constant_is_negative(const expression_t *expression)
3026 {
3027         ir_tarval *tv = fold_constant_to_tarval(expression);
3028         return tarval_is_negative(tv);
3029 }
3030
3031 long fold_constant_to_int(const expression_t *expression)
3032 {
3033         ir_tarval *tv = fold_constant_to_tarval(expression);
3034         if (!tarval_is_long(tv)) {
3035                 panic("result of constant folding is not integer");
3036         }
3037
3038         return get_tarval_long(tv);
3039 }
3040
3041 bool fold_constant_to_bool(const expression_t *expression)
3042 {
3043         ir_tarval *tv = fold_constant_to_tarval(expression);
3044         return !tarval_is_null(tv);
3045 }
3046
3047 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3048 {
3049         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3050
3051         /* first try to fold a constant condition */
3052         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3053                 bool val = fold_constant_to_bool(expression->condition);
3054                 if (val) {
3055                         expression_t *true_expression = expression->true_expression;
3056                         if (true_expression == NULL)
3057                                 true_expression = expression->condition;
3058                         return expression_to_firm(true_expression);
3059                 } else {
3060                         return expression_to_firm(expression->false_expression);
3061                 }
3062         }
3063
3064         ir_node *const true_block  = new_immBlock();
3065         ir_node *const false_block = new_immBlock();
3066         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3067         mature_immBlock(true_block);
3068         mature_immBlock(false_block);
3069
3070         set_cur_block(true_block);
3071         ir_node *true_val;
3072         if (expression->true_expression != NULL) {
3073                 true_val = expression_to_firm(expression->true_expression);
3074         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3075                 true_val = cond_expr;
3076         } else {
3077                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3078                  * comparison.  Generate a "1" as value for the true branch. */
3079                 true_val = new_Const(get_mode_one(mode_Is));
3080         }
3081         ir_node *const true_jmp = new_d_Jmp(dbgi);
3082
3083         set_cur_block(false_block);
3084         ir_node *const false_val = expression_to_firm(expression->false_expression);
3085         ir_node *const false_jmp = new_d_Jmp(dbgi);
3086
3087         /* create the common block */
3088         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3089         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3090         set_cur_block(block);
3091
3092         /* TODO improve static semantics, so either both or no values are NULL */
3093         if (true_val == NULL || false_val == NULL)
3094                 return NULL;
3095
3096         ir_node *const in[2] = { true_val, false_val };
3097         type_t  *const type  = skip_typeref(expression->base.type);
3098         ir_mode *mode;
3099         if (is_type_compound(type)) {
3100                 mode = mode_P;
3101         } else {
3102                 mode = get_ir_mode_arithmetic(type);
3103         }
3104         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3105
3106         return val;
3107 }
3108
3109 /**
3110  * Returns an IR-node representing the address of a field.
3111  */
3112 static ir_node *select_addr(const select_expression_t *expression)
3113 {
3114         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3115
3116         construct_select_compound(expression);
3117
3118         ir_node *compound_addr = expression_to_firm(expression->compound);
3119
3120         entity_t *entry = expression->compound_entry;
3121         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3122         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3123
3124         if (constant_folding) {
3125                 ir_mode *mode      = get_irn_mode(compound_addr);
3126                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3127                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3128                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3129         } else {
3130                 ir_entity *irentity = entry->compound_member.entity;
3131                 assert(irentity != NULL);
3132                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3133         }
3134 }
3135
3136 static ir_node *select_to_firm(const select_expression_t *expression)
3137 {
3138         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3139         ir_node  *addr = select_addr(expression);
3140         type_t   *type = revert_automatic_type_conversion(
3141                         (const expression_t*) expression);
3142         type           = skip_typeref(type);
3143
3144         entity_t *entry = expression->compound_entry;
3145         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3146
3147         if (entry->compound_member.bitfield) {
3148                 return bitfield_extract_to_firm(expression, addr);
3149         }
3150
3151         return deref_address(dbgi, type, addr);
3152 }
3153
3154 /* Values returned by __builtin_classify_type. */
3155 typedef enum gcc_type_class
3156 {
3157         no_type_class = -1,
3158         void_type_class,
3159         integer_type_class,
3160         char_type_class,
3161         enumeral_type_class,
3162         boolean_type_class,
3163         pointer_type_class,
3164         reference_type_class,
3165         offset_type_class,
3166         real_type_class,
3167         complex_type_class,
3168         function_type_class,
3169         method_type_class,
3170         record_type_class,
3171         union_type_class,
3172         array_type_class,
3173         string_type_class,
3174         set_type_class,
3175         file_type_class,
3176         lang_type_class
3177 } gcc_type_class;
3178
3179 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3180 {
3181         type_t *type = expr->type_expression->base.type;
3182
3183         /* FIXME gcc returns different values depending on whether compiling C or C++
3184          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3185         gcc_type_class tc;
3186         for (;;) {
3187                 type = skip_typeref(type);
3188                 switch (type->kind) {
3189                         case TYPE_ATOMIC: {
3190                                 const atomic_type_t *const atomic_type = &type->atomic;
3191                                 switch (atomic_type->akind) {
3192                                         /* should not be reached */
3193                                         case ATOMIC_TYPE_INVALID:
3194                                                 tc = no_type_class;
3195                                                 goto make_const;
3196
3197                                         /* gcc cannot do that */
3198                                         case ATOMIC_TYPE_VOID:
3199                                                 tc = void_type_class;
3200                                                 goto make_const;
3201
3202                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3203                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3204                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3205                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3206                                         case ATOMIC_TYPE_SHORT:
3207                                         case ATOMIC_TYPE_USHORT:
3208                                         case ATOMIC_TYPE_INT:
3209                                         case ATOMIC_TYPE_UINT:
3210                                         case ATOMIC_TYPE_LONG:
3211                                         case ATOMIC_TYPE_ULONG:
3212                                         case ATOMIC_TYPE_LONGLONG:
3213                                         case ATOMIC_TYPE_ULONGLONG:
3214                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3215                                                 tc = integer_type_class;
3216                                                 goto make_const;
3217
3218                                         case ATOMIC_TYPE_FLOAT:
3219                                         case ATOMIC_TYPE_DOUBLE:
3220                                         case ATOMIC_TYPE_LONG_DOUBLE:
3221                                                 tc = real_type_class;
3222                                                 goto make_const;
3223                                 }
3224                                 panic("Unexpected atomic type in classify_type_to_firm().");
3225                         }
3226
3227                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3228                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3229                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3230                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3231                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3232                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3233                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3234
3235                         /* gcc handles this as integer */
3236                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3237
3238                         /* gcc classifies the referenced type */
3239                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3240
3241                         /* typedef/typeof should be skipped already */
3242                         case TYPE_TYPEDEF:
3243                         case TYPE_TYPEOF:
3244                         case TYPE_ERROR:
3245                                 break;
3246                 }
3247                 panic("unexpected TYPE classify_type_to_firm().");
3248         }
3249
3250 make_const:;
3251         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3252         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3253         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3254         return new_d_Const(dbgi, tv);
3255 }
3256
3257 static ir_node *function_name_to_firm(
3258                 const funcname_expression_t *const expr)
3259 {
3260         switch(expr->kind) {
3261         case FUNCNAME_FUNCTION:
3262         case FUNCNAME_PRETTY_FUNCTION:
3263         case FUNCNAME_FUNCDNAME:
3264                 if (current_function_name == NULL) {
3265                         const source_position_t *const src_pos = &expr->base.source_position;
3266                         const char    *name  = current_function_entity->base.symbol->string;
3267                         const string_t string = { name, strlen(name) + 1 };
3268                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3269                 }
3270                 return current_function_name;
3271         case FUNCNAME_FUNCSIG:
3272                 if (current_funcsig == NULL) {
3273                         const source_position_t *const src_pos = &expr->base.source_position;
3274                         ir_entity *ent = get_irg_entity(current_ir_graph);
3275                         const char *const name = get_entity_ld_name(ent);
3276                         const string_t string = { name, strlen(name) + 1 };
3277                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3278                 }
3279                 return current_funcsig;
3280         }
3281         panic("Unsupported function name");
3282 }
3283
3284 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3285 {
3286         statement_t *statement = expr->statement;
3287
3288         assert(statement->kind == STATEMENT_COMPOUND);
3289         return compound_statement_to_firm(&statement->compound);
3290 }
3291
3292 static ir_node *va_start_expression_to_firm(
3293         const va_start_expression_t *const expr)
3294 {
3295         ir_entity *param_ent = current_vararg_entity;
3296         if (param_ent == NULL) {
3297                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3298                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3299                 ir_type *const param_type  = get_unknown_type();
3300                 param_ent = new_parameter_entity(frame_type, n, param_type);
3301                 current_vararg_entity = param_ent;
3302         }
3303
3304         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3305         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3306         ir_node  *const no_mem  = new_NoMem();
3307         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3308
3309         set_value_for_expression(expr->ap, arg_sel);
3310
3311         return NULL;
3312 }
3313
3314 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3315 {
3316         type_t       *const type    = expr->base.type;
3317         expression_t *const ap_expr = expr->ap;
3318         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3319         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3320         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3321         ir_node      *const res     = deref_address(dbgi, type, ap);
3322
3323         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3324         ir_mode      *const mode    = get_irn_mode(cnst);
3325         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3326         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3327         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3328         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3329         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3330
3331         set_value_for_expression_addr(ap_expr, add, ap_addr);
3332
3333         return res;
3334 }
3335
3336 /**
3337  * Generate Firm for a va_copy expression.
3338  */
3339 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3340 {
3341         ir_node *const src = expression_to_firm(expr->src);
3342         set_value_for_expression(expr->dst, src);
3343         return NULL;
3344 }
3345
3346 static ir_node *dereference_addr(const unary_expression_t *const expression)
3347 {
3348         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3349         return expression_to_firm(expression->value);
3350 }
3351
3352 /**
3353  * Returns a IR-node representing an lvalue of the given expression.
3354  */
3355 static ir_node *expression_to_addr(const expression_t *expression)
3356 {
3357         switch(expression->kind) {
3358         case EXPR_ARRAY_ACCESS:
3359                 return array_access_addr(&expression->array_access);
3360         case EXPR_CALL:
3361                 return call_expression_to_firm(&expression->call);
3362         case EXPR_COMPOUND_LITERAL:
3363                 return compound_literal_addr(&expression->compound_literal);
3364         case EXPR_REFERENCE:
3365                 return reference_addr(&expression->reference);
3366         case EXPR_SELECT:
3367                 return select_addr(&expression->select);
3368         case EXPR_UNARY_DEREFERENCE:
3369                 return dereference_addr(&expression->unary);
3370         default:
3371                 break;
3372         }
3373         panic("trying to get address of non-lvalue");
3374 }
3375
3376 static ir_node *builtin_constant_to_firm(
3377                 const builtin_constant_expression_t *expression)
3378 {
3379         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3380         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3381         return create_Const_from_bool(mode, v);
3382 }
3383
3384 static ir_node *builtin_types_compatible_to_firm(
3385                 const builtin_types_compatible_expression_t *expression)
3386 {
3387         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3388         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3389         bool     const value = types_compatible(left, right);
3390         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3391         return create_Const_from_bool(mode, value);
3392 }
3393
3394 static ir_node *get_label_block(label_t *label)
3395 {
3396         if (label->block != NULL)
3397                 return label->block;
3398
3399         /* beware: might be called from create initializer with current_ir_graph
3400          * set to const_code_irg. */
3401         ir_graph *rem    = current_ir_graph;
3402         current_ir_graph = current_function;
3403
3404         ir_node *block = new_immBlock();
3405
3406         label->block = block;
3407
3408         ARR_APP1(label_t *, all_labels, label);
3409
3410         current_ir_graph = rem;
3411         return block;
3412 }
3413
3414 /**
3415  * Pointer to a label.  This is used for the
3416  * GNU address-of-label extension.
3417  */
3418 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3419 {
3420         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3421         ir_node   *block  = get_label_block(label->label);
3422         ir_entity *entity = create_Block_entity(block);
3423
3424         symconst_symbol value;
3425         value.entity_p = entity;
3426         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3427 }
3428
3429 /**
3430  * creates firm nodes for an expression. The difference between this function
3431  * and expression_to_firm is, that this version might produce mode_b nodes
3432  * instead of mode_Is.
3433  */
3434 static ir_node *_expression_to_firm(expression_t const *const expr)
3435 {
3436 #ifndef NDEBUG
3437         if (!constant_folding) {
3438                 assert(!expr->base.transformed);
3439                 ((expression_t*)expr)->base.transformed = true;
3440         }
3441 #endif
3442
3443         switch (expr->kind) {
3444         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3445         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3446         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3447         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3448         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3449         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3450         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3451         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3452         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3453         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3454         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3455         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3456         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3457         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3458         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3459         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3460         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3461         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3462         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3463         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3464         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3465         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3466         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3467
3468         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3469
3470         case EXPR_ERROR: break;
3471         }
3472         panic("invalid expression found");
3473 }
3474
3475 /**
3476  * Check if a given expression is a GNU __builtin_expect() call.
3477  */
3478 static bool is_builtin_expect(const expression_t *expression)
3479 {
3480         if (expression->kind != EXPR_CALL)
3481                 return false;
3482
3483         expression_t *function = expression->call.function;
3484         if (function->kind != EXPR_REFERENCE)
3485                 return false;
3486         reference_expression_t *ref = &function->reference;
3487         if (ref->entity->kind         != ENTITY_FUNCTION ||
3488             ref->entity->function.btk != BUILTIN_EXPECT)
3489                 return false;
3490
3491         return true;
3492 }
3493
3494 static bool produces_mode_b(const expression_t *expression)
3495 {
3496         switch (expression->kind) {
3497         case EXPR_BINARY_EQUAL:
3498         case EXPR_BINARY_NOTEQUAL:
3499         case EXPR_BINARY_LESS:
3500         case EXPR_BINARY_LESSEQUAL:
3501         case EXPR_BINARY_GREATER:
3502         case EXPR_BINARY_GREATEREQUAL:
3503         case EXPR_BINARY_ISGREATER:
3504         case EXPR_BINARY_ISGREATEREQUAL:
3505         case EXPR_BINARY_ISLESS:
3506         case EXPR_BINARY_ISLESSEQUAL:
3507         case EXPR_BINARY_ISLESSGREATER:
3508         case EXPR_BINARY_ISUNORDERED:
3509         case EXPR_UNARY_NOT:
3510                 return true;
3511
3512         case EXPR_CALL:
3513                 if (is_builtin_expect(expression)) {
3514                         expression_t *argument = expression->call.arguments->expression;
3515                         return produces_mode_b(argument);
3516                 }
3517                 return false;
3518         case EXPR_BINARY_COMMA:
3519                 return produces_mode_b(expression->binary.right);
3520
3521         default:
3522                 return false;
3523         }
3524 }
3525
3526 static ir_node *expression_to_firm(const expression_t *expression)
3527 {
3528         if (!produces_mode_b(expression)) {
3529                 ir_node *res = _expression_to_firm(expression);
3530                 assert(res == NULL || get_irn_mode(res) != mode_b);
3531                 return res;
3532         }
3533
3534         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3535                 bool const constant_folding_old = constant_folding;
3536                 constant_folding = true;
3537                 ir_node *res  = _expression_to_firm(expression);
3538                 constant_folding = constant_folding_old;
3539                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3540                 assert(is_Const(res));
3541                 return create_Const_from_bool(mode, !is_Const_null(res));
3542         }
3543
3544         /* we have to produce a 0/1 from the mode_b expression */
3545         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3546         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3547         return produce_condition_result(expression, mode, dbgi);
3548 }
3549
3550 /**
3551  * create a short-circuit expression evaluation that tries to construct
3552  * efficient control flow structures for &&, || and ! expressions
3553  */
3554 static ir_node *create_condition_evaluation(const expression_t *expression,
3555                                             ir_node *true_block,
3556                                             ir_node *false_block)
3557 {
3558         switch(expression->kind) {
3559         case EXPR_UNARY_NOT: {
3560                 const unary_expression_t *unary_expression = &expression->unary;
3561                 create_condition_evaluation(unary_expression->value, false_block,
3562                                             true_block);
3563                 return NULL;
3564         }
3565         case EXPR_BINARY_LOGICAL_AND: {
3566                 const binary_expression_t *binary_expression = &expression->binary;
3567
3568                 ir_node *extra_block = new_immBlock();
3569                 create_condition_evaluation(binary_expression->left, extra_block,
3570                                             false_block);
3571                 mature_immBlock(extra_block);
3572                 set_cur_block(extra_block);
3573                 create_condition_evaluation(binary_expression->right, true_block,
3574                                             false_block);
3575                 return NULL;
3576         }
3577         case EXPR_BINARY_LOGICAL_OR: {
3578                 const binary_expression_t *binary_expression = &expression->binary;
3579
3580                 ir_node *extra_block = new_immBlock();
3581                 create_condition_evaluation(binary_expression->left, true_block,
3582                                             extra_block);
3583                 mature_immBlock(extra_block);
3584                 set_cur_block(extra_block);
3585                 create_condition_evaluation(binary_expression->right, true_block,
3586                                             false_block);
3587                 return NULL;
3588         }
3589         default:
3590                 break;
3591         }
3592
3593         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3594         ir_node  *cond_expr  = _expression_to_firm(expression);
3595         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3596         ir_node  *cond       = new_d_Cond(dbgi, condition);
3597         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3598         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3599
3600         /* set branch prediction info based on __builtin_expect */
3601         if (is_builtin_expect(expression) && is_Cond(cond)) {
3602                 call_argument_t *argument = expression->call.arguments->next;
3603                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3604                         bool               const cnst = fold_constant_to_bool(argument->expression);
3605                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3606                         set_Cond_jmp_pred(cond, pred);
3607                 }
3608         }
3609
3610         add_immBlock_pred(true_block, true_proj);
3611         add_immBlock_pred(false_block, false_proj);
3612
3613         set_unreachable_now();
3614         return cond_expr;
3615 }
3616
3617 static void create_variable_entity(entity_t *variable,
3618                                    declaration_kind_t declaration_kind,
3619                                    ir_type *parent_type)
3620 {
3621         assert(variable->kind == ENTITY_VARIABLE);
3622         type_t    *type = skip_typeref(variable->declaration.type);
3623
3624         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3625         ir_type   *const irtype    = get_ir_type(type);
3626         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3627         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3628         unsigned         alignment = variable->declaration.alignment;
3629
3630         set_entity_alignment(irentity, alignment);
3631
3632         handle_decl_modifiers(irentity, variable);
3633
3634         variable->declaration.kind  = (unsigned char) declaration_kind;
3635         variable->variable.v.entity = irentity;
3636         set_entity_ld_ident(irentity, create_ld_ident(variable));
3637
3638         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3639                 set_entity_volatility(irentity, volatility_is_volatile);
3640         }
3641 }
3642
3643
3644 typedef struct type_path_entry_t type_path_entry_t;
3645 struct type_path_entry_t {
3646         type_t           *type;
3647         ir_initializer_t *initializer;
3648         size_t            index;
3649         entity_t         *compound_entry;
3650 };
3651
3652 typedef struct type_path_t type_path_t;
3653 struct type_path_t {
3654         type_path_entry_t *path;
3655         type_t            *top_type;
3656         bool               invalid;
3657 };
3658
3659 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3660 {
3661         size_t len = ARR_LEN(path->path);
3662
3663         for (size_t i = 0; i < len; ++i) {
3664                 const type_path_entry_t *entry = & path->path[i];
3665
3666                 type_t *type = skip_typeref(entry->type);
3667                 if (is_type_compound(type)) {
3668                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3669                 } else if (is_type_array(type)) {
3670                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3671                 } else {
3672                         fprintf(stderr, "-INVALID-");
3673                 }
3674         }
3675         fprintf(stderr, "  (");
3676         print_type(path->top_type);
3677         fprintf(stderr, ")");
3678 }
3679
3680 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3681 {
3682         size_t len = ARR_LEN(path->path);
3683         assert(len > 0);
3684         return & path->path[len-1];
3685 }
3686
3687 static type_path_entry_t *append_to_type_path(type_path_t *path)
3688 {
3689         size_t len = ARR_LEN(path->path);
3690         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3691
3692         type_path_entry_t *result = & path->path[len];
3693         memset(result, 0, sizeof(result[0]));
3694         return result;
3695 }
3696
3697 static size_t get_compound_member_count(const compound_type_t *type)
3698 {
3699         compound_t *compound  = type->compound;
3700         size_t      n_members = 0;
3701         entity_t   *member    = compound->members.entities;
3702         for ( ; member != NULL; member = member->base.next) {
3703                 ++n_members;
3704         }
3705
3706         return n_members;
3707 }
3708
3709 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3710 {
3711         type_t *orig_top_type = path->top_type;
3712         type_t *top_type      = skip_typeref(orig_top_type);
3713
3714         assert(is_type_compound(top_type) || is_type_array(top_type));
3715
3716         if (ARR_LEN(path->path) == 0) {
3717                 return NULL;
3718         } else {
3719                 type_path_entry_t *top         = get_type_path_top(path);
3720                 ir_initializer_t  *initializer = top->initializer;
3721                 return get_initializer_compound_value(initializer, top->index);
3722         }
3723 }
3724
3725 static void descend_into_subtype(type_path_t *path)
3726 {
3727         type_t *orig_top_type = path->top_type;
3728         type_t *top_type      = skip_typeref(orig_top_type);
3729
3730         assert(is_type_compound(top_type) || is_type_array(top_type));
3731
3732         ir_initializer_t *initializer = get_initializer_entry(path);
3733
3734         type_path_entry_t *top = append_to_type_path(path);
3735         top->type              = top_type;
3736
3737         size_t len;
3738
3739         if (is_type_compound(top_type)) {
3740                 compound_t *const compound = top_type->compound.compound;
3741                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3742
3743                 top->compound_entry = entry;
3744                 top->index          = 0;
3745                 len                 = get_compound_member_count(&top_type->compound);
3746                 if (entry != NULL) {
3747                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3748                         path->top_type = entry->declaration.type;
3749                 }
3750         } else {
3751                 assert(is_type_array(top_type));
3752                 assert(top_type->array.size > 0);
3753
3754                 top->index     = 0;
3755                 path->top_type = top_type->array.element_type;
3756                 len            = top_type->array.size;
3757         }
3758         if (initializer == NULL
3759                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3760                 initializer = create_initializer_compound(len);
3761                 /* we have to set the entry at the 2nd latest path entry... */
3762                 size_t path_len = ARR_LEN(path->path);
3763                 assert(path_len >= 1);
3764                 if (path_len > 1) {
3765                         type_path_entry_t *entry        = & path->path[path_len-2];
3766                         ir_initializer_t  *tinitializer = entry->initializer;
3767                         set_initializer_compound_value(tinitializer, entry->index,
3768                                                        initializer);
3769                 }
3770         }
3771         top->initializer = initializer;
3772 }
3773
3774 static void ascend_from_subtype(type_path_t *path)
3775 {
3776         type_path_entry_t *top = get_type_path_top(path);
3777
3778         path->top_type = top->type;
3779
3780         size_t len = ARR_LEN(path->path);
3781         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3782 }
3783
3784 static void walk_designator(type_path_t *path, const designator_t *designator)
3785 {
3786         /* designators start at current object type */
3787         ARR_RESIZE(type_path_entry_t, path->path, 1);
3788
3789         for ( ; designator != NULL; designator = designator->next) {
3790                 type_path_entry_t *top         = get_type_path_top(path);
3791                 type_t            *orig_type   = top->type;
3792                 type_t            *type        = skip_typeref(orig_type);
3793
3794                 if (designator->symbol != NULL) {
3795                         assert(is_type_compound(type));
3796                         size_t    index  = 0;
3797                         symbol_t *symbol = designator->symbol;
3798
3799                         compound_t *compound = type->compound.compound;
3800                         entity_t   *iter     = compound->members.entities;
3801                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3802                                 if (iter->base.symbol == symbol) {
3803                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3804                                         break;
3805                                 }
3806                         }
3807                         assert(iter != NULL);
3808
3809                         /* revert previous initialisations of other union elements */
3810                         if (type->kind == TYPE_COMPOUND_UNION) {
3811                                 ir_initializer_t *initializer = top->initializer;
3812                                 if (initializer != NULL
3813                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3814                                         /* are we writing to a new element? */
3815                                         ir_initializer_t *oldi
3816                                                 = get_initializer_compound_value(initializer, index);
3817                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3818                                                 /* clear initializer */
3819                                                 size_t len
3820                                                         = get_initializer_compound_n_entries(initializer);
3821                                                 ir_initializer_t *nulli = get_initializer_null();
3822                                                 for (size_t i = 0; i < len; ++i) {
3823                                                         set_initializer_compound_value(initializer, i,
3824                                                                                        nulli);
3825                                                 }
3826                                         }
3827                                 }
3828                         }
3829
3830                         top->type           = orig_type;
3831                         top->compound_entry = iter;
3832                         top->index          = index;
3833                         orig_type           = iter->declaration.type;
3834                 } else {
3835                         expression_t *array_index = designator->array_index;
3836                         assert(designator->array_index != NULL);
3837                         assert(is_type_array(type));
3838
3839                         long index = fold_constant_to_int(array_index);
3840                         assert(index >= 0);
3841 #ifndef NDEBUG
3842                         if (type->array.size_constant) {
3843                                 long array_size = type->array.size;
3844                                 assert(index < array_size);
3845                         }
3846 #endif
3847
3848                         top->type  = orig_type;
3849                         top->index = (size_t) index;
3850                         orig_type  = type->array.element_type;
3851                 }
3852                 path->top_type = orig_type;
3853
3854                 if (designator->next != NULL) {
3855                         descend_into_subtype(path);
3856                 }
3857         }
3858
3859         path->invalid  = false;
3860 }
3861
3862 static void advance_current_object(type_path_t *path)
3863 {
3864         if (path->invalid) {
3865                 /* TODO: handle this... */
3866                 panic("invalid initializer in ast2firm (excessive elements)");
3867         }
3868
3869         type_path_entry_t *top = get_type_path_top(path);
3870
3871         type_t *type = skip_typeref(top->type);
3872         if (is_type_union(type)) {
3873                 /* only the first element is initialized in unions */
3874                 top->compound_entry = NULL;
3875         } else if (is_type_struct(type)) {
3876                 entity_t *entry = top->compound_entry;
3877
3878                 top->index++;
3879                 entry               = skip_unnamed_bitfields(entry->base.next);
3880                 top->compound_entry = entry;
3881                 if (entry != NULL) {
3882                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3883                         path->top_type = entry->declaration.type;
3884                         return;
3885                 }
3886         } else {
3887                 assert(is_type_array(type));
3888
3889                 top->index++;
3890                 if (!type->array.size_constant || top->index < type->array.size) {
3891                         return;
3892                 }
3893         }
3894
3895         /* we're past the last member of the current sub-aggregate, try if we
3896          * can ascend in the type hierarchy and continue with another subobject */
3897         size_t len = ARR_LEN(path->path);
3898
3899         if (len > 1) {
3900                 ascend_from_subtype(path);
3901                 advance_current_object(path);
3902         } else {
3903                 path->invalid = true;
3904         }
3905 }
3906
3907
3908 static ir_initializer_t *create_ir_initializer_value(
3909                 const initializer_value_t *initializer)
3910 {
3911         if (is_type_compound(initializer->value->base.type)) {
3912                 panic("initializer creation for compounds not implemented yet");
3913         }
3914         type_t       *type = initializer->value->base.type;
3915         expression_t *expr = initializer->value;
3916         ir_node *value = expression_to_firm(expr);
3917         ir_mode *mode  = get_ir_mode_storage(type);
3918         value          = create_conv(NULL, value, mode);
3919         return create_initializer_const(value);
3920 }
3921
3922 /** test wether type can be initialized by a string constant */
3923 static bool is_string_type(type_t *type)
3924 {
3925         type_t *inner;
3926         if (is_type_pointer(type)) {
3927                 inner = skip_typeref(type->pointer.points_to);
3928         } else if(is_type_array(type)) {
3929                 inner = skip_typeref(type->array.element_type);
3930         } else {
3931                 return false;
3932         }
3933
3934         return is_type_integer(inner);
3935 }
3936
3937 static ir_initializer_t *create_ir_initializer_list(
3938                 const initializer_list_t *initializer, type_t *type)
3939 {
3940         type_path_t path;
3941         memset(&path, 0, sizeof(path));
3942         path.top_type = type;
3943         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3944
3945         descend_into_subtype(&path);
3946
3947         for (size_t i = 0; i < initializer->len; ++i) {
3948                 const initializer_t *sub_initializer = initializer->initializers[i];
3949
3950                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3951                         walk_designator(&path, sub_initializer->designator.designator);
3952                         continue;
3953                 }
3954
3955                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3956                         /* we might have to descend into types until we're at a scalar
3957                          * type */
3958                         while(true) {
3959                                 type_t *orig_top_type = path.top_type;
3960                                 type_t *top_type      = skip_typeref(orig_top_type);
3961
3962                                 if (is_type_scalar(top_type))
3963                                         break;
3964                                 descend_into_subtype(&path);
3965                         }
3966                 } else if (sub_initializer->kind == INITIALIZER_STRING
3967                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3968                         /* we might have to descend into types until we're at a scalar
3969                          * type */
3970                         while (true) {
3971                                 type_t *orig_top_type = path.top_type;
3972                                 type_t *top_type      = skip_typeref(orig_top_type);
3973
3974                                 if (is_string_type(top_type))
3975                                         break;
3976                                 descend_into_subtype(&path);
3977                         }
3978                 }
3979
3980                 ir_initializer_t *sub_irinitializer
3981                         = create_ir_initializer(sub_initializer, path.top_type);
3982
3983                 size_t path_len = ARR_LEN(path.path);
3984                 assert(path_len >= 1);
3985                 type_path_entry_t *entry        = & path.path[path_len-1];
3986                 ir_initializer_t  *tinitializer = entry->initializer;
3987                 set_initializer_compound_value(tinitializer, entry->index,
3988                                                sub_irinitializer);
3989
3990                 advance_current_object(&path);
3991         }
3992
3993         assert(ARR_LEN(path.path) >= 1);
3994         ir_initializer_t *result = path.path[0].initializer;
3995         DEL_ARR_F(path.path);
3996
3997         return result;
3998 }
3999
4000 static ir_initializer_t *create_ir_initializer_string(
4001                 const initializer_string_t *initializer, type_t *type)
4002 {
4003         type = skip_typeref(type);
4004
4005         size_t            string_len    = initializer->string.size;
4006         assert(type->kind == TYPE_ARRAY);
4007         assert(type->array.size_constant);
4008         size_t            len           = type->array.size;
4009         ir_initializer_t *irinitializer = create_initializer_compound(len);
4010
4011         const char *string = initializer->string.begin;
4012         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4013
4014         for (size_t i = 0; i < len; ++i) {
4015                 char c = 0;
4016                 if (i < string_len)
4017                         c = string[i];
4018
4019                 ir_tarval        *tv = new_tarval_from_long(c, mode);
4020                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4021
4022                 set_initializer_compound_value(irinitializer, i, char_initializer);
4023         }
4024
4025         return irinitializer;
4026 }
4027
4028 static ir_initializer_t *create_ir_initializer_wide_string(
4029                 const initializer_wide_string_t *initializer, type_t *type)
4030 {
4031         assert(type->kind == TYPE_ARRAY);
4032         assert(type->array.size_constant);
4033         size_t            len           = type->array.size;
4034         size_t            string_len    = wstrlen(&initializer->string);
4035         ir_initializer_t *irinitializer = create_initializer_compound(len);
4036
4037         const char *p    = initializer->string.begin;
4038         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4039
4040         for (size_t i = 0; i < len; ++i) {
4041                 utf32 c = 0;
4042                 if (i < string_len) {
4043                         c = read_utf8_char(&p);
4044                 }
4045                 ir_tarval *tv = new_tarval_from_long(c, mode);
4046                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4047
4048                 set_initializer_compound_value(irinitializer, i, char_initializer);
4049         }
4050
4051         return irinitializer;
4052 }
4053
4054 static ir_initializer_t *create_ir_initializer(
4055                 const initializer_t *initializer, type_t *type)
4056 {
4057         switch(initializer->kind) {
4058                 case INITIALIZER_STRING:
4059                         return create_ir_initializer_string(&initializer->string, type);
4060
4061                 case INITIALIZER_WIDE_STRING:
4062                         return create_ir_initializer_wide_string(&initializer->wide_string,
4063                                                                  type);
4064
4065                 case INITIALIZER_LIST:
4066                         return create_ir_initializer_list(&initializer->list, type);
4067
4068                 case INITIALIZER_VALUE:
4069                         return create_ir_initializer_value(&initializer->value);
4070
4071                 case INITIALIZER_DESIGNATOR:
4072                         panic("unexpected designator initializer found");
4073         }
4074         panic("unknown initializer");
4075 }
4076
4077 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4078  *  are elements [...] the remainder of the aggregate shall be initialized
4079  *  implicitly the same as objects that have static storage duration. */
4080 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4081                 ir_node *base_addr)
4082 {
4083         /* for unions we must NOT do anything for null initializers */
4084         ir_type *owner = get_entity_owner(entity);
4085         if (is_Union_type(owner)) {
4086                 return;
4087         }
4088
4089         ir_type *ent_type = get_entity_type(entity);
4090         /* create sub-initializers for a compound type */
4091         if (is_compound_type(ent_type)) {
4092                 unsigned n_members = get_compound_n_members(ent_type);
4093                 for (unsigned n = 0; n < n_members; ++n) {
4094                         ir_entity *member = get_compound_member(ent_type, n);
4095                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4096                                                                 member);
4097                         create_dynamic_null_initializer(member, dbgi, addr);
4098                 }
4099                 return;
4100         }
4101         if (is_Array_type(ent_type)) {
4102                 assert(has_array_upper_bound(ent_type, 0));
4103                 long n = get_array_upper_bound_int(ent_type, 0);
4104                 for (long i = 0; i < n; ++i) {
4105                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4106                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4107                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4108                         ir_node   *in[1]    = { cnst };
4109                         ir_entity *arrent   = get_array_element_entity(ent_type);
4110                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4111                                                         arrent);
4112                         create_dynamic_null_initializer(arrent, dbgi, addr);
4113                 }
4114                 return;
4115         }
4116
4117         ir_mode *value_mode = get_type_mode(ent_type);
4118         ir_node *node       = new_Const(get_mode_null(value_mode));
4119
4120         /* is it a bitfield type? */
4121         if (is_Primitive_type(ent_type) &&
4122                         get_primitive_base_type(ent_type) != NULL) {
4123                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4124                 return;
4125         }
4126
4127         ir_node *mem    = get_store();
4128         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4129         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4130         set_store(proj_m);
4131 }
4132
4133 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4134                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4135 {
4136         switch(get_initializer_kind(initializer)) {
4137         case IR_INITIALIZER_NULL:
4138                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4139                 return;
4140         case IR_INITIALIZER_CONST: {
4141                 ir_node *node     = get_initializer_const_value(initializer);
4142                 ir_type *ent_type = get_entity_type(entity);
4143
4144                 /* is it a bitfield type? */
4145                 if (is_Primitive_type(ent_type) &&
4146                                 get_primitive_base_type(ent_type) != NULL) {
4147                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4148                         return;
4149                 }
4150
4151                 assert(get_type_mode(type) == get_irn_mode(node));
4152                 ir_node *mem    = get_store();
4153                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4154                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4155                 set_store(proj_m);
4156                 return;
4157         }
4158         case IR_INITIALIZER_TARVAL: {
4159                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4160                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4161                 ir_type   *ent_type = get_entity_type(entity);
4162
4163                 /* is it a bitfield type? */
4164                 if (is_Primitive_type(ent_type) &&
4165                                 get_primitive_base_type(ent_type) != NULL) {
4166                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4167                         return;
4168                 }
4169
4170                 assert(get_type_mode(type) == get_tarval_mode(tv));
4171                 ir_node *mem    = get_store();
4172                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4173                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4174                 set_store(proj_m);
4175                 return;
4176         }
4177         case IR_INITIALIZER_COMPOUND: {
4178                 assert(is_compound_type(type) || is_Array_type(type));
4179                 int n_members;
4180                 if (is_Array_type(type)) {
4181                         assert(has_array_upper_bound(type, 0));
4182                         n_members = get_array_upper_bound_int(type, 0);
4183                 } else {
4184                         n_members = get_compound_n_members(type);
4185                 }
4186
4187                 if (get_initializer_compound_n_entries(initializer)
4188                                 != (unsigned) n_members)
4189                         panic("initializer doesn't match compound type");
4190
4191                 for (int i = 0; i < n_members; ++i) {
4192                         ir_node   *addr;
4193                         ir_type   *irtype;
4194                         ir_entity *sub_entity;
4195                         if (is_Array_type(type)) {
4196                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4197                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4198                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4199                                 ir_node   *in[1]    = { cnst };
4200                                 irtype     = get_array_element_type(type);
4201                                 sub_entity = get_array_element_entity(type);
4202                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4203                                                        sub_entity);
4204                         } else {
4205                                 sub_entity = get_compound_member(type, i);
4206                                 irtype     = get_entity_type(sub_entity);
4207                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4208                                                              sub_entity);
4209                         }
4210
4211                         ir_initializer_t *sub_init
4212                                 = get_initializer_compound_value(initializer, i);
4213
4214                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4215                                                        addr);
4216                 }
4217                 return;
4218         }
4219         }
4220
4221         panic("invalid IR_INITIALIZER found");
4222 }
4223
4224 static void create_dynamic_initializer(ir_initializer_t *initializer,
4225                 dbg_info *dbgi, ir_entity *entity)
4226 {
4227         ir_node *frame     = get_irg_frame(current_ir_graph);
4228         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4229         ir_type *type      = get_entity_type(entity);
4230
4231         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4232 }
4233
4234 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4235                                      ir_entity *entity, type_t *type)
4236 {
4237         ir_node *memory = get_store();
4238         ir_node *nomem  = new_NoMem();
4239         ir_node *frame  = get_irg_frame(current_ir_graph);
4240         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4241
4242         if (initializer->kind == INITIALIZER_VALUE) {
4243                 initializer_value_t *initializer_value = &initializer->value;
4244
4245                 ir_node *value = expression_to_firm(initializer_value->value);
4246                 type = skip_typeref(type);
4247                 assign_value(dbgi, addr, type, value);
4248                 return;
4249         }
4250
4251         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4252                 ir_initializer_t *irinitializer
4253                         = create_ir_initializer(initializer, type);
4254
4255                 create_dynamic_initializer(irinitializer, dbgi, entity);
4256                 return;
4257         }
4258
4259         /* create a "template" entity which is copied to the entity on the stack */
4260         ir_entity *const init_entity
4261                 = create_initializer_entity(dbgi, initializer, type);
4262         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4263         ir_type *const irtype   = get_ir_type(type);
4264         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4265
4266         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4267         set_store(copyb_mem);
4268 }
4269
4270 static void create_initializer_local_variable_entity(entity_t *entity)
4271 {
4272         assert(entity->kind == ENTITY_VARIABLE);
4273         initializer_t *initializer = entity->variable.initializer;
4274         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4275         ir_entity     *irentity    = entity->variable.v.entity;
4276         type_t        *type        = entity->declaration.type;
4277
4278         create_local_initializer(initializer, dbgi, irentity, type);
4279 }
4280
4281 static void create_variable_initializer(entity_t *entity)
4282 {
4283         assert(entity->kind == ENTITY_VARIABLE);
4284         initializer_t *initializer = entity->variable.initializer;
4285         if (initializer == NULL)
4286                 return;
4287
4288         declaration_kind_t declaration_kind
4289                 = (declaration_kind_t) entity->declaration.kind;
4290         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4291                 create_initializer_local_variable_entity(entity);
4292                 return;
4293         }
4294
4295         type_t            *type = entity->declaration.type;
4296         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4297
4298         if (initializer->kind == INITIALIZER_VALUE) {
4299                 initializer_value_t *initializer_value = &initializer->value;
4300                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4301                 expression_t        *value     = initializer_value->value;
4302                 type_t              *init_type = value->base.type;
4303                 type_t              *skipped   = skip_typeref(init_type);
4304
4305                 if (!is_type_scalar(skipped)) {
4306                         /* skip convs */
4307                         while (value->kind == EXPR_UNARY_CAST)
4308                                 value = value->unary.value;
4309
4310                         if (value->kind != EXPR_COMPOUND_LITERAL)
4311                                 panic("expected non-scalar initializer to be a compound literal");
4312                         initializer = value->compound_literal.initializer;
4313                         goto have_initializer;
4314                 }
4315
4316                 ir_node *node = expression_to_firm(initializer_value->value);
4317
4318                 ir_mode *mode      = get_ir_mode_storage(init_type);
4319                 node = create_conv(dbgi, node, mode);
4320                 node = do_strict_conv(dbgi, node);
4321
4322                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4323                         set_value(entity->variable.v.value_number, node);
4324                 } else {
4325                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4326
4327                         ir_entity *irentity = entity->variable.v.entity;
4328
4329                         if (tq & TYPE_QUALIFIER_CONST
4330                                         && get_entity_owner(irentity) != get_tls_type()) {
4331                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4332                         }
4333                         set_atomic_ent_value(irentity, node);
4334                 }
4335         } else {
4336 have_initializer:
4337                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4338                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4339
4340                 ir_entity        *irentity        = entity->variable.v.entity;
4341                 ir_initializer_t *irinitializer
4342                         = create_ir_initializer(initializer, type);
4343
4344                 if (tq & TYPE_QUALIFIER_CONST) {
4345                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4346                 }
4347                 set_entity_initializer(irentity, irinitializer);
4348         }
4349 }
4350
4351 static void create_variable_length_array(entity_t *entity)
4352 {
4353         assert(entity->kind == ENTITY_VARIABLE);
4354         assert(entity->variable.initializer == NULL);
4355
4356         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4357         entity->variable.v.vla_base = NULL;
4358
4359         /* TODO: record VLA somewhere so we create the free node when we leave
4360          * it's scope */
4361 }
4362
4363 static void allocate_variable_length_array(entity_t *entity)
4364 {
4365         assert(entity->kind == ENTITY_VARIABLE);
4366         assert(entity->variable.initializer == NULL);
4367         assert(currently_reachable());
4368
4369         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4370         type_t   *type      = entity->declaration.type;
4371         ir_type  *el_type   = get_ir_type(type->array.element_type);
4372
4373         /* make sure size_node is calculated */
4374         get_type_size_node(type);
4375         ir_node  *elems = type->array.size_node;
4376         ir_node  *mem   = get_store();
4377         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4378
4379         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4380         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4381         set_store(proj_m);
4382
4383         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4384         entity->variable.v.vla_base = addr;
4385 }
4386
4387 /**
4388  * Creates a Firm local variable from a declaration.
4389  */
4390 static void create_local_variable(entity_t *entity)
4391 {
4392         assert(entity->kind == ENTITY_VARIABLE);
4393         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4394
4395         bool needs_entity = entity->variable.address_taken;
4396         type_t *type = skip_typeref(entity->declaration.type);
4397
4398         /* is it a variable length array? */
4399         if (is_type_array(type) && !type->array.size_constant) {
4400                 create_variable_length_array(entity);
4401                 return;
4402         } else if (is_type_array(type) || is_type_compound(type)) {
4403                 needs_entity = true;
4404         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4405                 needs_entity = true;
4406         }
4407
4408         if (needs_entity) {
4409                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4410                 create_variable_entity(entity,
4411                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4412                                        frame_type);
4413         } else {
4414                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4415                 entity->variable.v.value_number = next_value_number_function;
4416                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4417                                         entity);
4418                 ++next_value_number_function;
4419         }
4420 }
4421
4422 static void create_local_static_variable(entity_t *entity)
4423 {
4424         assert(entity->kind == ENTITY_VARIABLE);
4425         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4426
4427         type_t   *type           = skip_typeref(entity->declaration.type);
4428         ir_type  *const var_type = entity->variable.thread_local ?
4429                 get_tls_type() : get_glob_type();
4430         ir_type  *const irtype   = get_ir_type(type);
4431         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4432
4433         size_t l = strlen(entity->base.symbol->string);
4434         char   buf[l + sizeof(".%u")];
4435         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4436         ident     *const id       = id_unique(buf);
4437         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4438
4439         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4440                 set_entity_volatility(irentity, volatility_is_volatile);
4441         }
4442
4443         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4444         entity->variable.v.entity = irentity;
4445
4446         set_entity_ld_ident(irentity, id);
4447         set_entity_visibility(irentity, ir_visibility_local);
4448
4449         ir_graph *const old_current_ir_graph = current_ir_graph;
4450         current_ir_graph = get_const_code_irg();
4451
4452         create_variable_initializer(entity);
4453
4454         assert(current_ir_graph == get_const_code_irg());
4455         current_ir_graph = old_current_ir_graph;
4456 }
4457
4458
4459
4460 static ir_node *return_statement_to_firm(return_statement_t *statement)
4461 {
4462         if (!currently_reachable())
4463                 return NULL;
4464
4465         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4466         type_t   *type        = current_function_entity->declaration.type;
4467         ir_type  *func_irtype = get_ir_type(type);
4468
4469         ir_node *in[1];
4470         int      in_len;
4471         if (get_method_n_ress(func_irtype) > 0) {
4472                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4473
4474                 if (statement->value != NULL) {
4475                         ir_node *node = expression_to_firm(statement->value);
4476                         if (!is_compound_type(res_type)) {
4477                                 type_t  *ret_value_type = statement->value->base.type;
4478                                 ir_mode *mode           = get_ir_mode_storage(ret_value_type);
4479                                 node                    = create_conv(dbgi, node, mode);
4480                                 node                    = do_strict_conv(dbgi, node);
4481                         }
4482                         in[0] = node;
4483                 } else {
4484                         ir_mode *mode;
4485                         if (is_compound_type(res_type)) {
4486                                 mode = mode_P_data;
4487                         } else {
4488                                 mode = get_type_mode(res_type);
4489                         }
4490                         in[0] = new_Unknown(mode);
4491                 }
4492                 in_len = 1;
4493         } else {
4494                 /* build return_value for its side effects */
4495                 if (statement->value != NULL) {
4496                         expression_to_firm(statement->value);
4497                 }
4498                 in_len = 0;
4499         }
4500
4501         ir_node  *store = get_store();
4502         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4503
4504         ir_node *end_block = get_irg_end_block(current_ir_graph);
4505         add_immBlock_pred(end_block, ret);
4506
4507         set_unreachable_now();
4508         return NULL;
4509 }
4510
4511 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4512 {
4513         if (!currently_reachable())
4514                 return NULL;
4515
4516         return expression_to_firm(statement->expression);
4517 }
4518
4519 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4520 {
4521         entity_t *entity = compound->scope.entities;
4522         for ( ; entity != NULL; entity = entity->base.next) {
4523                 if (!is_declaration(entity))
4524                         continue;
4525
4526                 create_local_declaration(entity);
4527         }
4528
4529         ir_node     *result    = NULL;
4530         statement_t *statement = compound->statements;
4531         for ( ; statement != NULL; statement = statement->base.next) {
4532                 result = statement_to_firm(statement);
4533         }
4534
4535         return result;
4536 }
4537
4538 static void create_global_variable(entity_t *entity)
4539 {
4540         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4541         ir_visibility visibility = ir_visibility_default;
4542         ir_entity    *irentity;
4543         assert(entity->kind == ENTITY_VARIABLE);
4544
4545         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4546         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4547         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4548         case STORAGE_CLASS_NONE:
4549                 visibility = ir_visibility_default;
4550                 /* uninitialized globals get merged in C */
4551                 if (entity->variable.initializer == NULL)
4552                         linkage |= IR_LINKAGE_MERGE;
4553                 break;
4554         case STORAGE_CLASS_TYPEDEF:
4555         case STORAGE_CLASS_AUTO:
4556         case STORAGE_CLASS_REGISTER:
4557                 panic("invalid storage class for global var");
4558         }
4559
4560         ir_type *var_type = get_glob_type();
4561         if (entity->variable.thread_local) {
4562                 var_type = get_tls_type();
4563                 /* LINKAGE_MERGE not supported by current linkers */
4564                 linkage &= ~IR_LINKAGE_MERGE;
4565         }
4566         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4567         irentity = entity->variable.v.entity;
4568         add_entity_linkage(irentity, linkage);
4569         set_entity_visibility(irentity, visibility);
4570 }
4571
4572 static void create_local_declaration(entity_t *entity)
4573 {
4574         assert(is_declaration(entity));
4575
4576         /* construct type */
4577         (void) get_ir_type(entity->declaration.type);
4578         if (entity->base.symbol == NULL) {
4579                 return;
4580         }
4581
4582         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4583         case STORAGE_CLASS_STATIC:
4584                 if (entity->kind == ENTITY_FUNCTION) {
4585                         (void)get_function_entity(entity, NULL);
4586                 } else {
4587                         create_local_static_variable(entity);
4588                 }
4589                 return;
4590         case STORAGE_CLASS_EXTERN:
4591                 if (entity->kind == ENTITY_FUNCTION) {
4592                         assert(entity->function.statement == NULL);
4593                         (void)get_function_entity(entity, NULL);
4594                 } else {
4595                         create_global_variable(entity);
4596                         create_variable_initializer(entity);
4597                 }
4598                 return;
4599         case STORAGE_CLASS_NONE:
4600         case STORAGE_CLASS_AUTO:
4601         case STORAGE_CLASS_REGISTER:
4602                 if (entity->kind == ENTITY_FUNCTION) {
4603                         if (entity->function.statement != NULL) {
4604                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4605                                 (void)get_function_entity(entity, owner);
4606                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4607                                 enqueue_inner_function(entity);
4608                         } else {
4609                                 (void)get_function_entity(entity, NULL);
4610                         }
4611                 } else {
4612                         create_local_variable(entity);
4613                 }
4614                 return;
4615         case STORAGE_CLASS_TYPEDEF:
4616                 break;
4617         }
4618         panic("invalid storage class found");
4619 }
4620
4621 static void initialize_local_declaration(entity_t *entity)
4622 {
4623         if (entity->base.symbol == NULL)
4624                 return;
4625
4626         // no need to emit code in dead blocks
4627         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4628                         && !currently_reachable())
4629                 return;
4630
4631         switch ((declaration_kind_t) entity->declaration.kind) {
4632         case DECLARATION_KIND_LOCAL_VARIABLE:
4633         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4634                 create_variable_initializer(entity);
4635                 return;
4636
4637         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4638                 allocate_variable_length_array(entity);
4639                 return;
4640
4641         case DECLARATION_KIND_COMPOUND_MEMBER:
4642         case DECLARATION_KIND_GLOBAL_VARIABLE:
4643         case DECLARATION_KIND_FUNCTION:
4644         case DECLARATION_KIND_INNER_FUNCTION:
4645                 return;
4646
4647         case DECLARATION_KIND_PARAMETER:
4648         case DECLARATION_KIND_PARAMETER_ENTITY:
4649                 panic("can't initialize parameters");
4650
4651         case DECLARATION_KIND_UNKNOWN:
4652                 panic("can't initialize unknown declaration");
4653         }
4654         panic("invalid declaration kind");
4655 }
4656
4657 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4658 {
4659         entity_t *entity = statement->declarations_begin;
4660         if (entity == NULL)
4661                 return NULL;
4662
4663         entity_t *const last = statement->declarations_end;
4664         for ( ;; entity = entity->base.next) {
4665                 if (is_declaration(entity)) {
4666                         initialize_local_declaration(entity);
4667                 } else if (entity->kind == ENTITY_TYPEDEF) {
4668                         /* §6.7.7:3  Any array size expressions associated with variable length
4669                          * array declarators are evaluated each time the declaration of the
4670                          * typedef name is reached in the order of execution. */
4671                         type_t *const type = skip_typeref(entity->typedefe.type);
4672                         if (is_type_array(type) && type->array.is_vla)
4673                                 get_vla_size(&type->array);
4674                 }
4675                 if (entity == last)
4676                         break;
4677         }
4678
4679         return NULL;
4680 }
4681
4682 static ir_node *if_statement_to_firm(if_statement_t *statement)
4683 {
4684         /* Create the condition. */
4685         ir_node *true_block  = NULL;
4686         ir_node *false_block = NULL;
4687         if (currently_reachable()) {
4688                 true_block  = new_immBlock();
4689                 false_block = new_immBlock();
4690                 create_condition_evaluation(statement->condition, true_block, false_block);
4691                 mature_immBlock(true_block);
4692                 mature_immBlock(false_block);
4693         }
4694
4695         /* Create the true statement. */
4696         set_cur_block(true_block);
4697         statement_to_firm(statement->true_statement);
4698         ir_node *fallthrough_block = get_cur_block();
4699
4700         /* Create the false statement. */
4701         set_cur_block(false_block);
4702         if (statement->false_statement != NULL) {
4703                 statement_to_firm(statement->false_statement);
4704         }
4705
4706         /* Handle the block after the if-statement.  Minor simplification and
4707          * optimisation: Reuse the false/true block as fallthrough block, if the
4708          * true/false statement does not pass control to the fallthrough block, e.g.
4709          * in the typical if (x) return; pattern. */
4710         if (fallthrough_block) {
4711                 if (currently_reachable()) {
4712                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4713                         ir_node *const f_jump = new_Jmp();
4714                         ir_node *const in[]   = { t_jump, f_jump };
4715                         fallthrough_block = new_Block(2, in);
4716                 }
4717                 set_cur_block(fallthrough_block);
4718         }
4719
4720         return NULL;
4721 }
4722
4723 /* Create a jump node which jumps into target_block, if the current block is
4724  * reachable. */
4725 static void jump_if_reachable(ir_node *const target_block)
4726 {
4727         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4728         add_immBlock_pred(target_block, pred);
4729 }
4730
4731 static ir_node *while_statement_to_firm(while_statement_t *statement)
4732 {
4733         /* Create the header block */
4734         ir_node *const header_block = new_immBlock();
4735         jump_if_reachable(header_block);
4736
4737         /* Create the condition. */
4738         ir_node      *      body_block;
4739         ir_node      *      false_block;
4740         expression_t *const cond = statement->condition;
4741         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4742                         fold_constant_to_bool(cond)) {
4743                 /* Shortcut for while (true). */
4744                 body_block  = header_block;
4745                 false_block = NULL;
4746
4747                 keep_alive(header_block);
4748                 keep_all_memory(header_block);
4749         } else {
4750                 body_block  = new_immBlock();
4751                 false_block = new_immBlock();
4752
4753                 set_cur_block(header_block);
4754                 create_condition_evaluation(cond, body_block, false_block);
4755                 mature_immBlock(body_block);
4756         }
4757
4758         ir_node *const old_continue_label = continue_label;
4759         ir_node *const old_break_label    = break_label;
4760         continue_label = header_block;
4761         break_label    = false_block;
4762
4763         /* Create the loop body. */
4764         set_cur_block(body_block);
4765         statement_to_firm(statement->body);
4766         jump_if_reachable(header_block);
4767
4768         mature_immBlock(header_block);
4769         assert(false_block == NULL || false_block == break_label);
4770         false_block = break_label;
4771         if (false_block != NULL) {
4772                 mature_immBlock(false_block);
4773         }
4774         set_cur_block(false_block);
4775
4776         assert(continue_label == header_block);
4777         continue_label = old_continue_label;
4778         break_label    = old_break_label;
4779         return NULL;
4780 }
4781
4782 static ir_node *get_break_label(void)
4783 {
4784         if (break_label == NULL) {
4785                 break_label = new_immBlock();
4786         }
4787         return break_label;
4788 }
4789
4790 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4791 {
4792         /* create the header block */
4793         ir_node *header_block = new_immBlock();
4794
4795         /* the loop body */
4796         ir_node *body_block = new_immBlock();
4797         jump_if_reachable(body_block);
4798
4799         ir_node *old_continue_label = continue_label;
4800         ir_node *old_break_label    = break_label;
4801         continue_label              = header_block;
4802         break_label                 = NULL;
4803
4804         set_cur_block(body_block);
4805         statement_to_firm(statement->body);
4806         ir_node *const false_block = get_break_label();
4807
4808         assert(continue_label == header_block);
4809         continue_label = old_continue_label;
4810         break_label    = old_break_label;
4811
4812         jump_if_reachable(header_block);
4813
4814         /* create the condition */
4815         mature_immBlock(header_block);
4816         set_cur_block(header_block);
4817
4818         create_condition_evaluation(statement->condition, body_block, false_block);
4819         mature_immBlock(body_block);
4820         mature_immBlock(false_block);
4821
4822         set_cur_block(false_block);
4823         return NULL;
4824 }
4825
4826 static ir_node *for_statement_to_firm(for_statement_t *statement)
4827 {
4828         /* create declarations */
4829         entity_t *entity = statement->scope.entities;
4830         for ( ; entity != NULL; entity = entity->base.next) {
4831                 if (!is_declaration(entity))
4832                         continue;
4833
4834                 create_local_declaration(entity);
4835         }
4836
4837         if (currently_reachable()) {
4838                 entity = statement->scope.entities;
4839                 for ( ; entity != NULL; entity = entity->base.next) {
4840                         if (!is_declaration(entity))
4841                                 continue;
4842
4843                         initialize_local_declaration(entity);
4844                 }
4845
4846                 if (statement->initialisation != NULL) {
4847                         expression_to_firm(statement->initialisation);
4848                 }
4849         }
4850
4851         /* Create the header block */
4852         ir_node *const header_block = new_immBlock();
4853         jump_if_reachable(header_block);
4854
4855         /* Create the condition. */
4856         ir_node *body_block;
4857         ir_node *false_block;
4858         if (statement->condition != NULL) {
4859                 body_block  = new_immBlock();
4860                 false_block = new_immBlock();
4861
4862                 set_cur_block(header_block);
4863                 create_condition_evaluation(statement->condition, body_block, false_block);
4864                 mature_immBlock(body_block);
4865         } else {
4866                 /* for-ever. */
4867                 body_block  = header_block;
4868                 false_block = NULL;
4869
4870                 keep_alive(header_block);
4871                 keep_all_memory(header_block);
4872         }
4873
4874         /* Create the step block, if necessary. */
4875         ir_node      *      step_block = header_block;
4876         expression_t *const step       = statement->step;
4877         if (step != NULL) {
4878                 step_block = new_immBlock();
4879         }
4880
4881         ir_node *const old_continue_label = continue_label;
4882         ir_node *const old_break_label    = break_label;
4883         continue_label = step_block;
4884         break_label    = false_block;
4885
4886         /* Create the loop body. */
4887         set_cur_block(body_block);
4888         statement_to_firm(statement->body);
4889         jump_if_reachable(step_block);
4890
4891         /* Create the step code. */
4892         if (step != NULL) {
4893                 mature_immBlock(step_block);
4894                 set_cur_block(step_block);
4895                 expression_to_firm(step);
4896                 jump_if_reachable(header_block);
4897         }
4898
4899         mature_immBlock(header_block);
4900         assert(false_block == NULL || false_block == break_label);
4901         false_block = break_label;
4902         if (false_block != NULL) {
4903                 mature_immBlock(false_block);
4904         }
4905         set_cur_block(false_block);
4906
4907         assert(continue_label == step_block);
4908         continue_label = old_continue_label;
4909         break_label    = old_break_label;
4910         return NULL;
4911 }
4912
4913 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4914 {
4915         if (!currently_reachable())
4916                 return NULL;
4917
4918         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4919         ir_node  *jump = new_d_Jmp(dbgi);
4920         add_immBlock_pred(target_block, jump);
4921
4922         set_unreachable_now();
4923         return NULL;
4924 }
4925
4926 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4927 {
4928         /* determine number of cases */
4929         size_t n_cases = 0;
4930         for (case_label_statement_t *l = statement->first_case; l != NULL;
4931              l = l->next) {
4932                 /* default case */
4933                 if (l->expression == NULL)
4934                         continue;
4935                 if (l->is_empty_range)
4936                         continue;
4937                 ++n_cases;
4938         }
4939
4940         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4941         size_t           i   = 0;
4942         for (case_label_statement_t *l = statement->first_case; l != NULL;
4943              l = l->next) {
4944             if (l->expression == NULL) {
4945                         l->pn = pn_Switch_default;
4946                         continue;
4947                 }
4948                 if (l->is_empty_range)
4949                         continue;
4950                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4951                 ir_tarval *max = min;
4952                 long       pn  = (long) i+1;
4953                 if (l->end_range != NULL)
4954                         max = fold_constant_to_tarval(l->end_range);
4955                 ir_switch_table_set(res, i++, min, max, pn);
4956                 l->pn = pn;
4957         }
4958         return res;
4959 }
4960
4961 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4962 {
4963         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4964         ir_node  *switch_node = NULL;
4965
4966         if (currently_reachable()) {
4967                 ir_node *expression = expression_to_firm(statement->expression);
4968                 ir_switch_table *table = create_switch_table(statement);
4969                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4970
4971                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4972         }
4973
4974         set_unreachable_now();
4975
4976         ir_node *const old_switch            = current_switch;
4977         ir_node *const old_break_label       = break_label;
4978         const bool     old_saw_default_label = saw_default_label;
4979         saw_default_label                    = false;
4980         current_switch                       = switch_node;
4981         break_label                          = NULL;
4982
4983         statement_to_firm(statement->body);
4984
4985         jump_if_reachable(get_break_label());
4986
4987         if (!saw_default_label && switch_node) {
4988                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4989                 add_immBlock_pred(get_break_label(), proj);
4990         }
4991
4992         if (break_label != NULL) {
4993                 mature_immBlock(break_label);
4994         }
4995         set_cur_block(break_label);
4996
4997         assert(current_switch == switch_node);
4998         current_switch    = old_switch;
4999         break_label       = old_break_label;
5000         saw_default_label = old_saw_default_label;
5001         return NULL;
5002 }
5003
5004 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5005 {
5006         if (statement->is_empty_range)
5007                 return NULL;
5008
5009         if (current_switch != NULL) {
5010                 ir_node *block = new_immBlock();
5011                 /* Fallthrough from previous case */
5012                 jump_if_reachable(block);
5013
5014                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
5015                 add_immBlock_pred(block, proj);
5016                 if (statement->expression == NULL)
5017                         saw_default_label = true;
5018
5019                 mature_immBlock(block);
5020                 set_cur_block(block);
5021         }
5022
5023         return statement_to_firm(statement->statement);
5024 }
5025
5026 static ir_node *label_to_firm(const label_statement_t *statement)
5027 {
5028         ir_node *block = get_label_block(statement->label);
5029         jump_if_reachable(block);
5030
5031         set_cur_block(block);
5032         keep_alive(block);
5033         keep_all_memory(block);
5034
5035         return statement_to_firm(statement->statement);
5036 }
5037
5038 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5039 {
5040         if (!currently_reachable())
5041                 return NULL;
5042
5043         ir_node  *const irn  = expression_to_firm(statement->expression);
5044         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5045         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
5046
5047         set_irn_link(ijmp, ijmp_list);
5048         ijmp_list = ijmp;
5049
5050         set_unreachable_now();
5051         return NULL;
5052 }
5053
5054 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5055 {
5056         bool needs_memory = false;
5057
5058         if (statement->is_volatile) {
5059                 needs_memory = true;
5060         }
5061
5062         size_t         n_clobbers = 0;
5063         asm_clobber_t *clobber    = statement->clobbers;
5064         for ( ; clobber != NULL; clobber = clobber->next) {
5065                 const char *clobber_str = clobber->clobber.begin;
5066
5067                 if (!be_is_valid_clobber(clobber_str)) {
5068                         errorf(&statement->base.source_position,
5069                                    "invalid clobber '%s' specified", clobber->clobber);
5070                         continue;
5071                 }
5072
5073                 if (streq(clobber_str, "memory")) {
5074                         needs_memory = true;
5075                         continue;
5076                 }
5077
5078                 ident *id = new_id_from_str(clobber_str);
5079                 obstack_ptr_grow(&asm_obst, id);
5080                 ++n_clobbers;
5081         }
5082         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5083         ident **clobbers = NULL;
5084         if (n_clobbers > 0) {
5085                 clobbers = obstack_finish(&asm_obst);
5086         }
5087
5088         size_t n_inputs  = 0;
5089         asm_argument_t *argument = statement->inputs;
5090         for ( ; argument != NULL; argument = argument->next)
5091                 n_inputs++;
5092         size_t n_outputs = 0;
5093         argument = statement->outputs;
5094         for ( ; argument != NULL; argument = argument->next)
5095                 n_outputs++;
5096
5097         unsigned next_pos = 0;
5098
5099         ir_node *ins[n_inputs + n_outputs + 1];
5100         size_t   in_size = 0;
5101
5102         ir_asm_constraint tmp_in_constraints[n_outputs];
5103
5104         const expression_t *out_exprs[n_outputs];
5105         ir_node            *out_addrs[n_outputs];
5106         size_t              out_size = 0;
5107
5108         argument = statement->outputs;
5109         for ( ; argument != NULL; argument = argument->next) {
5110                 const char *constraints = argument->constraints.begin;
5111                 asm_constraint_flags_t asm_flags
5112                         = be_parse_asm_constraints(constraints);
5113
5114                 {
5115                         source_position_t const *const pos = &statement->base.source_position;
5116                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5117                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5118                         }
5119                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5120                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5121                                 continue;
5122                         }
5123                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5124                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5125                                 continue;
5126                         }
5127                 }
5128
5129                 unsigned pos = next_pos++;
5130                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5131                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5132                         expression_t *expr = argument->expression;
5133                         ir_node      *addr = expression_to_addr(expr);
5134                         /* in+output, construct an artifical same_as constraint on the
5135                          * input */
5136                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5137                                 char     buf[64];
5138                                 ir_node *value = get_value_from_lvalue(expr, addr);
5139
5140                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5141
5142                                 ir_asm_constraint constraint;
5143                                 constraint.pos              = pos;
5144                                 constraint.constraint       = new_id_from_str(buf);
5145                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5146                                 tmp_in_constraints[in_size] = constraint;
5147                                 ins[in_size] = value;
5148
5149                                 ++in_size;
5150                         }
5151
5152                         out_exprs[out_size] = expr;
5153                         out_addrs[out_size] = addr;
5154                         ++out_size;
5155                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5156                         /* pure memory ops need no input (but we have to make sure we
5157                          * attach to the memory) */
5158                         assert(! (asm_flags &
5159                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5160                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5161                         needs_memory = true;
5162
5163                         /* we need to attach the address to the inputs */
5164                         expression_t *expr = argument->expression;
5165
5166                         ir_asm_constraint constraint;
5167                         constraint.pos              = pos;
5168                         constraint.constraint       = new_id_from_str(constraints);
5169                         constraint.mode             = mode_M;
5170                         tmp_in_constraints[in_size] = constraint;
5171
5172                         ins[in_size]          = expression_to_addr(expr);
5173                         ++in_size;
5174                         continue;
5175                 } else {
5176                         errorf(&statement->base.source_position,
5177                                "only modifiers but no place set in constraints '%s'",
5178                                constraints);
5179                         continue;
5180                 }
5181
5182                 ir_asm_constraint constraint;
5183                 constraint.pos        = pos;
5184                 constraint.constraint = new_id_from_str(constraints);
5185                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5186
5187                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5188         }
5189         assert(obstack_object_size(&asm_obst)
5190                         == out_size * sizeof(ir_asm_constraint));
5191         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5192
5193
5194         obstack_grow(&asm_obst, tmp_in_constraints,
5195                      in_size * sizeof(tmp_in_constraints[0]));
5196         /* find and count input and output arguments */
5197         argument = statement->inputs;
5198         for ( ; argument != NULL; argument = argument->next) {
5199                 const char *constraints = argument->constraints.begin;
5200                 asm_constraint_flags_t asm_flags
5201                         = be_parse_asm_constraints(constraints);
5202
5203                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5204                         errorf(&statement->base.source_position,
5205                                "some constraints in '%s' are not supported", constraints);
5206                         continue;
5207                 }
5208                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5209                         errorf(&statement->base.source_position,
5210                                "some constraints in '%s' are invalid", constraints);
5211                         continue;
5212                 }
5213                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5214                         errorf(&statement->base.source_position,
5215                                "write flag specified for input constraints '%s'",
5216                                constraints);
5217                         continue;
5218                 }
5219
5220                 ir_node *input;
5221                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5222                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5223                         /* we can treat this as "normal" input */
5224                         input = expression_to_firm(argument->expression);
5225                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5226                         /* pure memory ops need no input (but we have to make sure we
5227                          * attach to the memory) */
5228                         assert(! (asm_flags &
5229                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5230                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5231                         needs_memory = true;
5232                         input = expression_to_addr(argument->expression);
5233                 } else {
5234                         errorf(&statement->base.source_position,
5235                                "only modifiers but no place set in constraints '%s'",
5236                                constraints);
5237                         continue;
5238                 }
5239
5240                 ir_asm_constraint constraint;
5241                 constraint.pos        = next_pos++;
5242                 constraint.constraint = new_id_from_str(constraints);
5243                 constraint.mode       = get_irn_mode(input);
5244
5245                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5246                 ins[in_size++] = input;
5247         }
5248
5249         if (needs_memory) {
5250                 ir_asm_constraint constraint;
5251                 constraint.pos        = next_pos++;
5252                 constraint.constraint = new_id_from_str("");
5253                 constraint.mode       = mode_M;
5254
5255                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5256                 ins[in_size++] = get_store();
5257         }
5258
5259         assert(obstack_object_size(&asm_obst)
5260                         == in_size * sizeof(ir_asm_constraint));
5261         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5262
5263         /* create asm node */
5264         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5265
5266         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5267
5268         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5269                                   out_size, output_constraints,
5270                                   n_clobbers, clobbers, asm_text);
5271
5272         if (statement->is_volatile) {
5273                 set_irn_pinned(node, op_pin_state_pinned);
5274         } else {
5275                 set_irn_pinned(node, op_pin_state_floats);
5276         }
5277
5278         /* create output projs & connect them */
5279         if (needs_memory) {
5280                 ir_node *projm = new_Proj(node, mode_M, out_size);
5281                 set_store(projm);
5282         }
5283
5284         size_t i;
5285         for (i = 0; i < out_size; ++i) {
5286                 const expression_t *out_expr = out_exprs[i];
5287                 long                pn       = i;
5288                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5289                 ir_node            *proj     = new_Proj(node, mode, pn);
5290                 ir_node            *addr     = out_addrs[i];
5291
5292                 set_value_for_expression_addr(out_expr, proj, addr);
5293         }
5294
5295         return NULL;
5296 }
5297
5298 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5299 {
5300         statement_to_firm(statement->try_statement);
5301         source_position_t const *const pos = &statement->base.source_position;
5302         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5303         return NULL;
5304 }
5305
5306 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5307 {
5308         errorf(&statement->base.source_position, "__leave not supported yet");
5309         return NULL;
5310 }
5311
5312 /**
5313  * Transform a statement.
5314  */
5315 static ir_node *statement_to_firm(statement_t *const stmt)
5316 {
5317 #ifndef NDEBUG
5318         assert(!stmt->base.transformed);
5319         stmt->base.transformed = true;
5320 #endif
5321
5322         switch (stmt->kind) {
5323         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5324         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5325         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5326         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5327         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5328         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5329         case STATEMENT_EMPTY:         return NULL; /* nothing */
5330         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5331         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5332         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5333         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5334         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5335         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5336         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5337         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5338         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5339
5340         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5341         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5342         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5343
5344         case STATEMENT_ERROR: panic("error statement found");
5345         }
5346         panic("statement not implemented");
5347 }
5348
5349 static int count_local_variables(const entity_t *entity,
5350                                  const entity_t *const last)
5351 {
5352         int count = 0;
5353         entity_t const *const end = last != NULL ? last->base.next : NULL;
5354         for (; entity != end; entity = entity->base.next) {
5355                 type_t *type;
5356                 bool    address_taken;
5357
5358                 if (entity->kind == ENTITY_VARIABLE) {
5359                         type          = skip_typeref(entity->declaration.type);
5360                         address_taken = entity->variable.address_taken;
5361                 } else if (entity->kind == ENTITY_PARAMETER) {
5362                         type          = skip_typeref(entity->declaration.type);
5363                         address_taken = entity->parameter.address_taken;
5364                 } else {
5365                         continue;
5366                 }
5367
5368                 if (!address_taken && is_type_scalar(type))
5369                         ++count;
5370         }
5371         return count;
5372 }
5373
5374 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5375 {
5376         int *const count = env;
5377
5378         switch (stmt->kind) {
5379         case STATEMENT_DECLARATION: {
5380                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5381                 *count += count_local_variables(decl_stmt->declarations_begin,
5382                                 decl_stmt->declarations_end);
5383                 break;
5384         }
5385
5386         case STATEMENT_FOR:
5387                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5388                 break;
5389
5390         default:
5391                 break;
5392         }
5393 }
5394
5395 /**
5396  * Return the number of local (alias free) variables used by a function.
5397  */
5398 static int get_function_n_local_vars(entity_t *entity)
5399 {
5400         const function_t *function = &entity->function;
5401         int count = 0;
5402
5403         /* count parameters */
5404         count += count_local_variables(function->parameters.entities, NULL);
5405
5406         /* count local variables declared in body */
5407         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5408         return count;
5409 }
5410
5411 /**
5412  * Build Firm code for the parameters of a function.
5413  */
5414 static void initialize_function_parameters(entity_t *entity)
5415 {
5416         assert(entity->kind == ENTITY_FUNCTION);
5417         ir_graph *irg             = current_ir_graph;
5418         ir_node  *args            = get_irg_args(irg);
5419         int       n               = 0;
5420         ir_type  *function_irtype;
5421
5422         if (entity->function.need_closure) {
5423                 /* add an extra parameter for the static link */
5424                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5425                 ++n;
5426
5427                 /* Matze: IMO this is wrong, nested functions should have an own
5428                  * type and not rely on strange parameters... */
5429                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5430         } else {
5431                 function_irtype = get_ir_type(entity->declaration.type);
5432         }
5433
5434
5435
5436         entity_t *parameter = entity->function.parameters.entities;
5437         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5438                 if (parameter->kind != ENTITY_PARAMETER)
5439                         continue;
5440
5441                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5442                 type_t *type = skip_typeref(parameter->declaration.type);
5443
5444                 bool needs_entity = parameter->parameter.address_taken;
5445                 assert(!is_type_array(type));
5446                 if (is_type_compound(type)) {
5447                         needs_entity = true;
5448                 }
5449
5450                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5451                 if (needs_entity) {
5452                         ir_type   *frame_type = get_irg_frame_type(irg);
5453                         ir_entity *param
5454                                 = new_parameter_entity(frame_type, n, param_irtype);
5455                         parameter->declaration.kind
5456                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5457                         parameter->parameter.v.entity = param;
5458                         continue;
5459                 }
5460
5461                 ir_mode *param_mode = get_type_mode(param_irtype);
5462                 long     pn         = n;
5463                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5464
5465                 ir_mode *mode = get_ir_mode_storage(type);
5466                 value = create_conv(NULL, value, mode);
5467                 value = do_strict_conv(NULL, value);
5468
5469                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5470                 parameter->parameter.v.value_number = next_value_number_function;
5471                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5472                                         parameter);
5473                 ++next_value_number_function;
5474
5475                 set_value(parameter->parameter.v.value_number, value);
5476         }
5477 }
5478
5479 /**
5480  * Handle additional decl modifiers for IR-graphs
5481  *
5482  * @param irg            the IR-graph
5483  * @param dec_modifiers  additional modifiers
5484  */
5485 static void handle_decl_modifier_irg(ir_graph *irg,
5486                                      decl_modifiers_t decl_modifiers)
5487 {
5488         if (decl_modifiers & DM_NAKED) {
5489                 /* TRUE if the declaration includes the Microsoft
5490                    __declspec(naked) specifier. */
5491                 add_irg_additional_properties(irg, mtp_property_naked);
5492         }
5493         if (decl_modifiers & DM_FORCEINLINE) {
5494                 /* TRUE if the declaration includes the
5495                    Microsoft __forceinline specifier. */
5496                 set_irg_inline_property(irg, irg_inline_forced);
5497         }
5498         if (decl_modifiers & DM_NOINLINE) {
5499                 /* TRUE if the declaration includes the Microsoft
5500                    __declspec(noinline) specifier. */
5501                 set_irg_inline_property(irg, irg_inline_forbidden);
5502         }
5503 }
5504
5505 static void add_function_pointer(ir_type *segment, ir_entity *method,
5506                                  const char *unique_template)
5507 {
5508         ir_type   *method_type  = get_entity_type(method);
5509         ir_type   *ptr_type     = new_type_pointer(method_type);
5510
5511         /* these entities don't really have a name but firm only allows
5512          * "" in ld_ident.
5513          * Note that we mustn't give these entities a name since for example
5514          * Mach-O doesn't allow them. */
5515         ident     *ide          = id_unique(unique_template);
5516         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5517         ir_graph  *irg          = get_const_code_irg();
5518         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5519                                                            method);
5520
5521         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5522         set_entity_compiler_generated(ptr, 1);
5523         set_entity_visibility(ptr, ir_visibility_private);
5524         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5525         set_atomic_ent_value(ptr, val);
5526 }
5527
5528 /**
5529  * Generate possible IJmp branches to a given label block.
5530  */
5531 static void gen_ijmp_branches(ir_node *block)
5532 {
5533         ir_node *ijmp;
5534         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5535                 add_immBlock_pred(block, ijmp);
5536         }
5537 }
5538
5539 /**
5540  * Create code for a function and all inner functions.
5541  *
5542  * @param entity  the function entity
5543  */
5544 static void create_function(entity_t *entity)
5545 {
5546         assert(entity->kind == ENTITY_FUNCTION);
5547         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5548
5549         if (entity->function.statement == NULL)
5550                 return;
5551
5552         inner_functions     = NULL;
5553         current_trampolines = NULL;
5554
5555         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5556                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5557                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5558         }
5559         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5560                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5561                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5562         }
5563
5564         current_function_entity = entity;
5565         current_function_name   = NULL;
5566         current_funcsig         = NULL;
5567
5568         assert(all_labels == NULL);
5569         all_labels = NEW_ARR_F(label_t *, 0);
5570         ijmp_list  = NULL;
5571
5572         int       n_local_vars = get_function_n_local_vars(entity);
5573         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5574         current_ir_graph = irg;
5575
5576         ir_graph *old_current_function = current_function;
5577         current_function = irg;
5578
5579         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5580         current_vararg_entity = NULL;
5581
5582         set_irg_fp_model(irg, firm_fp_model);
5583         tarval_enable_fp_ops(1);
5584         set_irn_dbg_info(get_irg_start_block(irg),
5585                          get_entity_dbg_info(function_entity));
5586
5587         /* set inline flags */
5588         if (entity->function.is_inline)
5589                 set_irg_inline_property(irg, irg_inline_recomended);
5590         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5591
5592         next_value_number_function = 0;
5593         initialize_function_parameters(entity);
5594         current_static_link = entity->function.static_link;
5595
5596         statement_to_firm(entity->function.statement);
5597
5598         ir_node *end_block = get_irg_end_block(irg);
5599
5600         /* do we have a return statement yet? */
5601         if (currently_reachable()) {
5602                 type_t *type = skip_typeref(entity->declaration.type);
5603                 assert(is_type_function(type));
5604                 const function_type_t *func_type   = &type->function;
5605                 const type_t          *return_type
5606                         = skip_typeref(func_type->return_type);
5607
5608                 ir_node *ret;
5609                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5610                         ret = new_Return(get_store(), 0, NULL);
5611                 } else {
5612                         ir_mode *mode;
5613                         if (is_type_scalar(return_type)) {
5614                                 mode = get_ir_mode_storage(func_type->return_type);
5615                         } else {
5616                                 mode = mode_P_data;
5617                         }
5618
5619                         ir_node *in[1];
5620                         /* §5.1.2.2.3 main implicitly returns 0 */
5621                         if (is_main(entity)) {
5622                                 in[0] = new_Const(get_mode_null(mode));
5623                         } else {
5624                                 in[0] = new_Unknown(mode);
5625                         }
5626                         ret = new_Return(get_store(), 1, in);
5627                 }
5628                 add_immBlock_pred(end_block, ret);
5629         }
5630
5631         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5632                 label_t *label = all_labels[i];
5633                 if (label->address_taken) {
5634                         gen_ijmp_branches(label->block);
5635                 }
5636                 mature_immBlock(label->block);
5637         }
5638
5639         DEL_ARR_F(all_labels);
5640         all_labels = NULL;
5641
5642         irg_finalize_cons(irg);
5643
5644         /* finalize the frame type */
5645         ir_type *frame_type = get_irg_frame_type(irg);
5646         int      n          = get_compound_n_members(frame_type);
5647         int      align_all  = 4;
5648         int      offset     = 0;
5649         for (int i = 0; i < n; ++i) {
5650                 ir_entity *member      = get_compound_member(frame_type, i);
5651                 ir_type   *entity_type = get_entity_type(member);
5652
5653                 int align = get_type_alignment_bytes(entity_type);
5654                 if (align > align_all)
5655                         align_all = align;
5656                 int misalign = 0;
5657                 if (align > 0) {
5658                         misalign  = offset % align;
5659                         if (misalign > 0) {
5660                                 offset += align - misalign;
5661                         }
5662                 }
5663
5664                 set_entity_offset(member, offset);
5665                 offset += get_type_size_bytes(entity_type);
5666         }
5667         set_type_size_bytes(frame_type, offset);
5668         set_type_alignment_bytes(frame_type, align_all);
5669
5670         irg_verify(irg, VERIFY_ENFORCE_SSA);
5671         current_vararg_entity = old_current_vararg_entity;
5672         current_function      = old_current_function;
5673
5674         if (current_trampolines != NULL) {
5675                 DEL_ARR_F(current_trampolines);
5676                 current_trampolines = NULL;
5677         }
5678
5679         /* create inner functions if any */
5680         entity_t **inner = inner_functions;
5681         if (inner != NULL) {
5682                 ir_type *rem_outer_frame      = current_outer_frame;
5683                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5684                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5685                         create_function(inner[i]);
5686                 }
5687                 DEL_ARR_F(inner);
5688
5689                 current_outer_frame      = rem_outer_frame;
5690         }
5691 }
5692
5693 static void scope_to_firm(scope_t *scope)
5694 {
5695         /* first pass: create declarations */
5696         entity_t *entity = scope->entities;
5697         for ( ; entity != NULL; entity = entity->base.next) {
5698                 if (entity->base.symbol == NULL)
5699                         continue;
5700
5701                 if (entity->kind == ENTITY_FUNCTION) {
5702                         if (entity->function.btk != BUILTIN_NONE) {
5703                                 /* builtins have no representation */
5704                                 continue;
5705                         }
5706                         (void)get_function_entity(entity, NULL);
5707                 } else if (entity->kind == ENTITY_VARIABLE) {
5708                         create_global_variable(entity);
5709                 } else if (entity->kind == ENTITY_NAMESPACE) {
5710                         scope_to_firm(&entity->namespacee.members);
5711                 }
5712         }
5713
5714         /* second pass: create code/initializers */
5715         entity = scope->entities;
5716         for ( ; entity != NULL; entity = entity->base.next) {
5717                 if (entity->base.symbol == NULL)
5718                         continue;
5719
5720                 if (entity->kind == ENTITY_FUNCTION) {
5721                         if (entity->function.btk != BUILTIN_NONE) {
5722                                 /* builtins have no representation */
5723                                 continue;
5724                         }
5725                         create_function(entity);
5726                 } else if (entity->kind == ENTITY_VARIABLE) {
5727                         assert(entity->declaration.kind
5728                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5729                         current_ir_graph = get_const_code_irg();
5730                         create_variable_initializer(entity);
5731                 }
5732         }
5733 }
5734
5735 void init_ast2firm(void)
5736 {
5737         obstack_init(&asm_obst);
5738         init_atomic_modes();
5739
5740         ir_set_debug_retrieve(dbg_retrieve);
5741         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5742
5743         /* create idents for all known runtime functions */
5744         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5745                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5746         }
5747
5748         entitymap_init(&entitymap);
5749 }
5750
5751 static void init_ir_types(void)
5752 {
5753         static int ir_types_initialized = 0;
5754         if (ir_types_initialized)
5755                 return;
5756         ir_types_initialized = 1;
5757
5758         ir_type_int        = get_ir_type(type_int);
5759         ir_type_char       = get_ir_type(type_char);
5760         ir_type_const_char = get_ir_type(type_const_char);
5761         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5762         ir_type_void       = get_ir_type(type_void);
5763
5764         be_params             = be_get_backend_param();
5765         mode_float_arithmetic = be_params->mode_float_arithmetic;
5766
5767         stack_param_align     = be_params->stack_param_align;
5768 }
5769
5770 void exit_ast2firm(void)
5771 {
5772         entitymap_destroy(&entitymap);
5773         obstack_free(&asm_obst, NULL);
5774 }
5775
5776 static void global_asm_to_firm(statement_t *s)
5777 {
5778         for (; s != NULL; s = s->base.next) {
5779                 assert(s->kind == STATEMENT_ASM);
5780
5781                 char const *const text = s->asms.asm_text.begin;
5782                 size_t            size = s->asms.asm_text.size;
5783
5784                 /* skip the last \0 */
5785                 if (text[size - 1] == '\0')
5786                         --size;
5787
5788                 ident *const id = new_id_from_chars(text, size);
5789                 add_irp_asm(id);
5790         }
5791 }
5792
5793 void translation_unit_to_firm(translation_unit_t *unit)
5794 {
5795         /* initialize firm arithmetic */
5796         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5797         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5798
5799         /* just to be sure */
5800         continue_label           = NULL;
5801         break_label              = NULL;
5802         current_switch           = NULL;
5803         current_translation_unit = unit;
5804
5805         init_ir_types();
5806
5807         scope_to_firm(&unit->scope);
5808         global_asm_to_firm(unit->global_asm);
5809
5810         current_ir_graph         = NULL;
5811         current_translation_unit = NULL;
5812 }