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_cond;
  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 switch_statement_t *current_switch;
  90 static ir_graph           *current_function;
  91 static translation_unit_t *current_translation_unit;
  92 static trampoline_region  *current_trampolines;
  93 static ir_type            *current_outer_frame;
  94 static ir_node            *current_static_link;
  95 static ir_entity          *current_vararg_entity;
  96
  97 static entitymap_t  entitymap;
  98
  99 static struct obstack asm_obst;
 100
 101 typedef enum declaration_kind_t {
 102         DECLARATION_KIND_UNKNOWN,
 103         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 104         DECLARATION_KIND_GLOBAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 107         DECLARATION_KIND_PARAMETER,
 108         DECLARATION_KIND_PARAMETER_ENTITY,
 109         DECLARATION_KIND_FUNCTION,
 110         DECLARATION_KIND_COMPOUND_MEMBER,
 111         DECLARATION_KIND_INNER_FUNCTION
 112 } declaration_kind_t;
 113
 114 static ir_mode *get_ir_mode_storage(type_t *type);
 115
 116 static ir_type *get_ir_type_incomplete(type_t *type);
 117
 118 static void enqueue_inner_function(entity_t *entity)
 119 {
 120         if (inner_functions == NULL)
 121                 inner_functions = NEW_ARR_F(entity_t *, 0);
 122         ARR_APP1(entity_t*, inner_functions, entity);
 123 }
 124
 125 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 126 {
 127         const entity_t *entity = get_irg_loc_description(irg, pos);
 128
 129         if (entity != NULL) {
 130                 source_position_t const *const pos = &entity->base.source_position;
 131                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 132         }
 133         return new_r_Unknown(irg, mode);
 134 }
 135
 136 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 137 {
 138         const source_position_t *pos = (const source_position_t*) dbg;
 139         if (pos == NULL)
 140                 return NULL;
 141         if (line != NULL)
 142                 *line = pos->lineno;
 143         return pos->input_name;
 144 }
 145
 146 static dbg_info *get_dbg_info(const source_position_t *pos)
 147 {
 148         return (dbg_info*) pos;
 149 }
 150
 151 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 152                                     const type_dbg_info *dbg)
 153 {
 154         assert(dbg != NULL);
 155         print_to_buffer(buffer, buffer_size);
 156         const type_t *type = (const type_t*) dbg;
 157         print_type(type);
 158         finish_print_to_buffer();
 159 }
 160
 161 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 162 {
 163         return (type_dbg_info*) type;
 164 }
 165
 166 /* is the current block a reachable one? */
 167 static bool currently_reachable(void)
 168 {
 169         ir_node *const block = get_cur_block();
 170         return block != NULL && !is_Bad(block);
 171 }
 172
 173 static void set_unreachable_now(void)
 174 {
 175         set_cur_block(NULL);
 176 }
 177
 178 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 179
 180 static ir_mode *mode_int, *mode_uint;
 181
 182 static ir_node *_expression_to_firm(const expression_t *expression);
 183 static ir_node *expression_to_firm(const expression_t *expression);
 184 static void create_local_declaration(entity_t *entity);
 185
 186 static unsigned decide_modulo_shift(unsigned type_size)
 187 {
 188         if (architecture_modulo_shift == 0)
 189                 return 0;
 190         if (type_size < architecture_modulo_shift)
 191                 return architecture_modulo_shift;
 192         return type_size;
 193 }
 194
 195 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 196 {
 197         unsigned flags = get_atomic_type_flags(kind);
 198         unsigned size  = get_atomic_type_size(kind);
 199         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 200                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 201                 char            name[64];
 202                 ir_mode_sort    sort;
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = 0;
 206                 ir_mode_arithmetic arithmetic;
 207
 208                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 209                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 210                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 211                                  bit_size);
 212                         sort         = irms_int_number;
 213                         arithmetic   = irma_twos_complement;
 214                         modulo_shift = decide_modulo_shift(bit_size);
 215                 } else {
 216                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 217                         snprintf(name, sizeof(name), "F%u", bit_size);
 218                         sort         = irms_float_number;
 219                         arithmetic   = irma_ieee754;
 220                 }
 221                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 222                                    modulo_shift);
 223         }
 224
 225         return NULL;
 226 }
 227
 228 /**
 229  * Initialises the atomic modes depending on the machine size.
 230  */
 231 static void init_atomic_modes(void)
 232 {
 233         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 234                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 235         }
 236         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 237         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 238
 239         /* there's no real void type in firm */
 240         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 241 }
 242
 243 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 244 {
 245         assert(kind <= ATOMIC_TYPE_LAST);
 246         return atomic_modes[kind];
 247 }
 248
 249 static ir_node *get_vla_size(array_type_t *const type)
 250 {
 251         ir_node *size_node = type->size_node;
 252         if (size_node == NULL) {
 253                 size_node = expression_to_firm(type->size_expression);
 254                 type->size_node = size_node;
 255         }
 256         return size_node;
 257 }
 258
 259 /**
 260  * Return a node representing the size of a type.
 261  */
 262 static ir_node *get_type_size_node(type_t *type)
 263 {
 264         type = skip_typeref(type);
 265
 266         if (is_type_array(type) && type->array.is_vla) {
 267                 ir_node *size_node = get_vla_size(&type->array);
 268                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 269                 ir_mode *mode      = get_irn_mode(size_node);
 270                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 271                 return real_size;
 272         }
 273
 274         ir_mode *mode = get_ir_mode_storage(type_size_t);
 275         symconst_symbol sym;
 276         sym.type_p = get_ir_type(type);
 277         return new_SymConst(mode, sym, symconst_type_size);
 278 }
 279
 280 static unsigned count_parameters(const function_type_t *function_type)
 281 {
 282         unsigned count = 0;
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         for ( ; parameter != NULL; parameter = parameter->next) {
 286                 ++count;
 287         }
 288
 289         return count;
 290 }
 291
 292 /**
 293  * Creates a Firm type for an atomic type
 294  */
 295 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 296 {
 297         ir_mode        *mode      = atomic_modes[akind];
 298         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 299         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 300         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 301
 302         set_type_alignment_bytes(irtype, alignment);
 303
 304         return irtype;
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(const atomic_type_t *type)
 311 {
 312         atomic_type_kind_t  kind = type->akind;
 313         ir_mode            *mode = atomic_modes[kind];
 314         ident              *id   = get_mode_ident(mode);
 315
 316         (void) id;
 317
 318         /* FIXME: finish the array */
 319         return NULL;
 320 }
 321
 322 /**
 323  * Creates a Firm type for an imaginary type
 324  */
 325 static ir_type *create_imaginary_type(const atomic_type_t *type)
 326 {
 327         return create_atomic_type(type->akind, (const type_t*)type);
 328 }
 329
 330 /**
 331  * return type of a parameter (and take transparent union gnu extension into
 332  * account)
 333  */
 334 static type_t *get_parameter_type(type_t *orig_type)
 335 {
 336         type_t *type = skip_typeref(orig_type);
 337         if (is_type_union(type)
 338                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 339                 compound_t *compound = type->compound.compound;
 340                 type                 = compound->members.entities->declaration.type;
 341         }
 342
 343         return type;
 344 }
 345
 346 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 347 {
 348         type_t        *return_type  = skip_typeref(function_type->return_type);
 349
 350         int            n_parameters = count_parameters(function_type)
 351                                        + (for_closure ? 1 : 0);
 352         int            n_results    = return_type == type_void ? 0 : 1;
 353         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 354         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 355
 356         if (return_type != type_void) {
 357                 ir_type *restype = get_ir_type(return_type);
 358                 set_method_res_type(irtype, 0, restype);
 359         }
 360
 361         function_parameter_t *parameter = function_type->parameters;
 362         int                   n         = 0;
 363         if (for_closure) {
 364                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 365                 set_method_param_type(irtype, n, p_irtype);
 366                 ++n;
 367         }
 368         for ( ; parameter != NULL; parameter = parameter->next) {
 369                 type_t  *type     = get_parameter_type(parameter->type);
 370                 ir_type *p_irtype = get_ir_type(type);
 371                 set_method_param_type(irtype, n, p_irtype);
 372                 ++n;
 373         }
 374
 375         bool is_variadic = function_type->variadic;
 376
 377         if (is_variadic)
 378                 set_method_variadicity(irtype, variadicity_variadic);
 379
 380         unsigned cc = get_method_calling_convention(irtype);
 381         switch (function_type->calling_convention) {
 382         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 383         case CC_CDECL:
 384 is_cdecl:
 385                 set_method_calling_convention(irtype, SET_CDECL(cc));
 386                 break;
 387
 388         case CC_STDCALL:
 389                 if (is_variadic)
 390                         goto is_cdecl;
 391
 392                 /* only non-variadic function can use stdcall, else use cdecl */
 393                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 394                 break;
 395
 396         case CC_FASTCALL:
 397                 if (is_variadic)
 398                         goto is_cdecl;
 399                 /* only non-variadic function can use fastcall, else use cdecl */
 400                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 401                 break;
 402
 403         case CC_THISCALL:
 404                 /* Hmm, leave default, not accepted by the parser yet. */
 405                 break;
 406         }
 407
 408         if (for_closure)
 409                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 410
 411         const decl_modifiers_t modifiers = function_type->modifiers;
 412         if (modifiers & DM_CONST)
 413                 add_method_additional_properties(irtype, mtp_property_const);
 414         if (modifiers & DM_PURE)
 415                 add_method_additional_properties(irtype, mtp_property_pure);
 416         if (modifiers & DM_RETURNS_TWICE)
 417                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 418         if (modifiers & DM_NORETURN)
 419                 add_method_additional_properties(irtype, mtp_property_noreturn);
 420         if (modifiers & DM_NOTHROW)
 421                 add_method_additional_properties(irtype, mtp_property_nothrow);
 422         if (modifiers & DM_MALLOC)
 423                 add_method_additional_properties(irtype, mtp_property_malloc);
 424
 425         return irtype;
 426 }
 427
 428 static ir_type *create_pointer_type(pointer_type_t *type)
 429 {
 430         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 431         type_t        *points_to    = type->points_to;
 432         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 433         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 434
 435         return irtype;
 436 }
 437
 438 static ir_type *create_reference_type(reference_type_t *type)
 439 {
 440         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 441         type_t        *refers_to    = type->refers_to;
 442         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 443         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 444
 445         return irtype;
 446 }
 447
 448 static ir_type *create_array_type(array_type_t *type)
 449 {
 450         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 451         type_t        *element_type    = type->element_type;
 452         ir_type       *ir_element_type = get_ir_type(element_type);
 453         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 454
 455         const int align = get_type_alignment_bytes(ir_element_type);
 456         set_type_alignment_bytes(irtype, align);
 457
 458         if (type->size_constant) {
 459                 int n_elements = type->size;
 460
 461                 set_array_bounds_int(irtype, 0, 0, n_elements);
 462
 463                 size_t elemsize = get_type_size_bytes(ir_element_type);
 464                 if (elemsize % align > 0) {
 465                         elemsize += align - (elemsize % align);
 466                 }
 467                 set_type_size_bytes(irtype, n_elements * elemsize);
 468         } else {
 469                 set_array_lower_bound_int(irtype, 0, 0);
 470         }
 471         set_type_state(irtype, layout_fixed);
 472
 473         return irtype;
 474 }
 475
 476 /**
 477  * Return the signed integer type of size bits.
 478  *
 479  * @param size   the size
 480  */
 481 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 482                                                  unsigned size,
 483                                                                                                  const type_t *type)
 484 {
 485         static ir_mode *s_modes[64 + 1] = {NULL, };
 486         ir_type *res;
 487         ir_mode *mode;
 488
 489         if (size <= 0 || size > 64)
 490                 return NULL;
 491
 492         mode = s_modes[size];
 493         if (mode == NULL) {
 494                 char name[32];
 495
 496                 snprintf(name, sizeof(name), "bf_I%u", size);
 497                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 498                                    size <= 32 ? 32 : size );
 499                 s_modes[size] = mode;
 500         }
 501
 502         type_dbg_info *dbgi = get_type_dbg_info_(type);
 503         res                 = new_d_type_primitive(mode, dbgi);
 504         set_primitive_base_type(res, base_tp);
 505
 506         return res;
 507 }
 508
 509 /**
 510  * Return the unsigned integer type of size bits.
 511  *
 512  * @param size   the size
 513  */
 514 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 515                                                    unsigned size,
 516                                                                                                    const type_t *type)
 517 {
 518         static ir_mode *u_modes[64 + 1] = {NULL, };
 519         ir_type *res;
 520         ir_mode *mode;
 521
 522         if (size <= 0 || size > 64)
 523                 return NULL;
 524
 525         mode = u_modes[size];
 526         if (mode == NULL) {
 527                 char name[32];
 528
 529                 snprintf(name, sizeof(name), "bf_U%u", size);
 530                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 531                                    size <= 32 ? 32 : size );
 532                 u_modes[size] = mode;
 533         }
 534
 535         type_dbg_info *dbgi = get_type_dbg_info_(type);
 536         res = new_d_type_primitive(mode, dbgi);
 537         set_primitive_base_type(res, base_tp);
 538
 539         return res;
 540 }
 541
 542 static ir_type *create_bitfield_type(const entity_t *entity)
 543 {
 544         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 545         type_t *base = skip_typeref(entity->declaration.type);
 546         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 547         ir_type *irbase = get_ir_type(base);
 548
 549         unsigned bit_size = entity->compound_member.bit_size;
 550
 551         assert(!is_type_float(base));
 552         if (is_type_signed(base)) {
 553                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 554         } else {
 555                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 556         }
 557 }
 558
 559 #define INVALID_TYPE ((ir_type_ptr)-1)
 560
 561 enum {
 562         COMPOUND_IS_STRUCT = false,
 563         COMPOUND_IS_UNION  = true
 564 };
 565
 566 /**
 567  * Construct firm type from ast struct type.
 568  */
 569 static ir_type *create_compound_type(compound_type_t *type,
 570                                      bool incomplete, bool is_union)
 571 {
 572         compound_t *compound = type->compound;
 573
 574         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 575                 return compound->irtype;
 576         }
 577
 578         symbol_t *type_symbol = compound->base.symbol;
 579         ident    *id;
 580         if (type_symbol != NULL) {
 581                 id = new_id_from_str(type_symbol->string);
 582         } else {
 583                 if (is_union) {
 584                         id = id_unique("__anonymous_union.%u");
 585                 } else {
 586                         id = id_unique("__anonymous_struct.%u");
 587                 }
 588         }
 589
 590         ir_type *irtype;
 591         if (is_union) {
 592                 irtype = new_type_union(id);
 593         } else {
 594                 irtype = new_type_struct(id);
 595         }
 596
 597         compound->irtype_complete = false;
 598         compound->irtype          = irtype;
 599
 600         if (incomplete)
 601                 return irtype;
 602
 603         if (is_union) {
 604                 layout_union_type(type);
 605         } else {
 606                 layout_struct_type(type);
 607         }
 608
 609         compound->irtype_complete = true;
 610
 611         entity_t *entry = compound->members.entities;
 612         for ( ; entry != NULL; entry = entry->base.next) {
 613                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 614                         continue;
 615
 616                 symbol_t *symbol     = entry->base.symbol;
 617                 type_t   *entry_type = entry->declaration.type;
 618                 ident    *ident;
 619                 if (symbol == NULL) {
 620                         /* anonymous bitfield member, skip */
 621                         if (entry->compound_member.bitfield)
 622                                 continue;
 623                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 624                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 625                         ident = id_unique("anon.%u");
 626                 } else {
 627                         ident = new_id_from_str(symbol->string);
 628                 }
 629
 630                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 631
 632                 ir_type *entry_irtype;
 633                 if (entry->compound_member.bitfield) {
 634                         entry_irtype = create_bitfield_type(entry);
 635                 } else {
 636                         entry_irtype = get_ir_type(entry_type);
 637                 }
 638                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 639
 640                 set_entity_offset(entity, entry->compound_member.offset);
 641                 set_entity_offset_bits_remainder(entity,
 642                                                  entry->compound_member.bit_offset);
 643
 644                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 645                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 646                 entry->compound_member.entity = entity;
 647         }
 648
 649         set_type_alignment_bytes(irtype, compound->alignment);
 650         set_type_size_bytes(irtype, compound->size);
 651         set_type_state(irtype, layout_fixed);
 652
 653         return irtype;
 654 }
 655
 656 static void determine_enum_values(enum_type_t *const type)
 657 {
 658         ir_mode   *const mode    = atomic_modes[type->base.akind];
 659         ir_tarval *const one     = get_mode_one(mode);
 660         ir_tarval *      tv_next = get_mode_null(mode);
 661
 662         bool constant_folding_old = constant_folding;
 663         constant_folding = true;
 664
 665         enum_t   *enume = type->enume;
 666         entity_t *entry = enume->base.next;
 667         for (; entry != NULL; entry = entry->base.next) {
 668                 if (entry->kind != ENTITY_ENUM_VALUE)
 669                         break;
 670
 671                 expression_t *const init = entry->enum_value.value;
 672                 if (init != NULL) {
 673                         ir_node *const cnst = expression_to_firm(init);
 674                         if (!is_Const(cnst)) {
 675                                 panic("couldn't fold constant");
 676                         }
 677                         tv_next = get_Const_tarval(cnst);
 678                 }
 679                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 680                 entry->enum_value.tv = tv_next;
 681                 tv_next = tarval_add(tv_next, one);
 682         }
 683
 684         constant_folding = constant_folding_old;
 685 }
 686
 687 static ir_type *create_enum_type(enum_type_t *const type)
 688 {
 689         return create_atomic_type(type->base.akind, (const type_t*) type);
 690 }
 691
 692 static ir_type *get_ir_type_incomplete(type_t *type)
 693 {
 694         assert(type != NULL);
 695         type = skip_typeref(type);
 696
 697         if (type->base.firm_type != NULL) {
 698                 assert(type->base.firm_type != INVALID_TYPE);
 699                 return type->base.firm_type;
 700         }
 701
 702         switch (type->kind) {
 703         case TYPE_COMPOUND_STRUCT:
 704                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 705         case TYPE_COMPOUND_UNION:
 706                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 707         default:
 708                 return get_ir_type(type);
 709         }
 710 }
 711
 712 ir_type *get_ir_type(type_t *type)
 713 {
 714         assert(type != NULL);
 715
 716         type = skip_typeref(type);
 717
 718         if (type->base.firm_type != NULL) {
 719                 assert(type->base.firm_type != INVALID_TYPE);
 720                 return type->base.firm_type;
 721         }
 722
 723         ir_type *firm_type = NULL;
 724         switch (type->kind) {
 725         case TYPE_ERROR:
 726                 /* Happens while constant folding, when there was an error */
 727                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 728
 729         case TYPE_ATOMIC:
 730                 firm_type = create_atomic_type(type->atomic.akind, type);
 731                 break;
 732         case TYPE_COMPLEX:
 733                 firm_type = create_complex_type(&type->atomic);
 734                 break;
 735         case TYPE_IMAGINARY:
 736                 firm_type = create_imaginary_type(&type->atomic);
 737                 break;
 738         case TYPE_FUNCTION:
 739                 firm_type = create_method_type(&type->function, false);
 740                 break;
 741         case TYPE_POINTER:
 742                 firm_type = create_pointer_type(&type->pointer);
 743                 break;
 744         case TYPE_REFERENCE:
 745                 firm_type = create_reference_type(&type->reference);
 746                 break;
 747         case TYPE_ARRAY:
 748                 firm_type = create_array_type(&type->array);
 749                 break;
 750         case TYPE_COMPOUND_STRUCT:
 751                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 752                 break;
 753         case TYPE_COMPOUND_UNION:
 754                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 755                 break;
 756         case TYPE_ENUM:
 757                 firm_type = create_enum_type(&type->enumt);
 758                 break;
 759
 760         case TYPE_TYPEOF:
 761         case TYPE_TYPEDEF:
 762                 break;
 763         }
 764         if (firm_type == NULL)
 765                 panic("unknown type found");
 766
 767         type->base.firm_type = firm_type;
 768         return firm_type;
 769 }
 770
 771 static ir_mode *get_ir_mode_storage(type_t *type)
 772 {
 773         ir_type *irtype = get_ir_type(type);
 774
 775         /* firm doesn't report a mode for arrays somehow... */
 776         if (is_Array_type(irtype)) {
 777                 return mode_P_data;
 778         }
 779
 780         ir_mode *mode = get_type_mode(irtype);
 781         assert(mode != NULL);
 782         return mode;
 783 }
 784
 785 /*
 786  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 787  * int that it returns bigger modes for floating point on some platforms
 788  * (x87 internally does arithemtic with 80bits)
 789  */
 790 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 791 {
 792         ir_mode *mode = get_ir_mode_storage(type);
 793         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 794                 return mode_float_arithmetic;
 795         }
 796
 797         return mode;
 798 }
 799
 800 /** Names of the runtime functions. */
 801 static const struct {
 802         int        id;           /**< the rts id */
 803         int        n_res;        /**< number of return values */
 804         const char *name;        /**< the name of the rts function */
 805         int        n_params;     /**< number of parameters */
 806         unsigned   flags;        /**< language flags */
 807 } rts_data[] = {
 808         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 809         { rts_abort,      0, "abort",        0, _C89 },
 810         { rts_alloca,     1, "alloca",       1, _ALL },
 811         { rts_abs,        1, "abs",          1, _C89 },
 812         { rts_labs,       1, "labs",         1, _C89 },
 813         { rts_llabs,      1, "llabs",        1, _C99 },
 814         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 815
 816         { rts_fabs,       1, "fabs",         1, _C89 },
 817         { rts_sqrt,       1, "sqrt",         1, _C89 },
 818         { rts_cbrt,       1, "cbrt",         1, _C99 },
 819         { rts_exp,        1, "exp",          1, _C89 },
 820         { rts_exp2,       1, "exp2",         1, _C89 },
 821         { rts_exp10,      1, "exp10",        1, _GNUC },
 822         { rts_log,        1, "log",          1, _C89 },
 823         { rts_log2,       1, "log2",         1, _C89 },
 824         { rts_log10,      1, "log10",        1, _C89 },
 825         { rts_pow,        1, "pow",          2, _C89 },
 826         { rts_sin,        1, "sin",          1, _C89 },
 827         { rts_cos,        1, "cos",          1, _C89 },
 828         { rts_tan,        1, "tan",          1, _C89 },
 829         { rts_asin,       1, "asin",         1, _C89 },
 830         { rts_acos,       1, "acos",         1, _C89 },
 831         { rts_atan,       1, "atan",         1, _C89 },
 832         { rts_sinh,       1, "sinh",         1, _C89 },
 833         { rts_cosh,       1, "cosh",         1, _C89 },
 834         { rts_tanh,       1, "tanh",         1, _C89 },
 835
 836         { rts_fabsf,      1, "fabsf",        1, _C99 },
 837         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 838         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 839         { rts_expf,       1, "expf",         1, _C99 },
 840         { rts_exp2f,      1, "exp2f",        1, _C99 },
 841         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 842         { rts_logf,       1, "logf",         1, _C99 },
 843         { rts_log2f,      1, "log2f",        1, _C99 },
 844         { rts_log10f,     1, "log10f",       1, _C99 },
 845         { rts_powf,       1, "powf",         2, _C99 },
 846         { rts_sinf,       1, "sinf",         1, _C99 },
 847         { rts_cosf,       1, "cosf",         1, _C99 },
 848         { rts_tanf,       1, "tanf",         1, _C99 },
 849         { rts_asinf,      1, "asinf",        1, _C99 },
 850         { rts_acosf,      1, "acosf",        1, _C99 },
 851         { rts_atanf,      1, "atanf",        1, _C99 },
 852         { rts_sinhf,      1, "sinhf",        1, _C99 },
 853         { rts_coshf,      1, "coshf",        1, _C99 },
 854         { rts_tanhf,      1, "tanhf",        1, _C99 },
 855
 856         { rts_fabsl,      1, "fabsl",        1, _C99 },
 857         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 858         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 859         { rts_expl,       1, "expl",         1, _C99 },
 860         { rts_exp2l,      1, "exp2l",        1, _C99 },
 861         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 862         { rts_logl,       1, "logl",         1, _C99 },
 863         { rts_log2l,      1, "log2l",        1, _C99 },
 864         { rts_log10l,     1, "log10l",       1, _C99 },
 865         { rts_powl,       1, "powl",         2, _C99 },
 866         { rts_sinl,       1, "sinl",         1, _C99 },
 867         { rts_cosl,       1, "cosl",         1, _C99 },
 868         { rts_tanl,       1, "tanl",         1, _C99 },
 869         { rts_asinl,      1, "asinl",        1, _C99 },
 870         { rts_acosl,      1, "acosl",        1, _C99 },
 871         { rts_atanl,      1, "atanl",        1, _C99 },
 872         { rts_sinhl,      1, "sinhl",        1, _C99 },
 873         { rts_coshl,      1, "coshl",        1, _C99 },
 874         { rts_tanhl,      1, "tanhl",        1, _C99 },
 875
 876         { rts_strcmp,     1, "strcmp",       2, _C89 },
 877         { rts_strncmp,    1, "strncmp",      3, _C89 },
 878         { rts_strcpy,     1, "strcpy",       2, _C89 },
 879         { rts_strlen,     1, "strlen",       1, _C89 },
 880         { rts_memcpy,     1, "memcpy",       3, _C89 },
 881         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 882         { rts_memmove,    1, "memmove",      3, _C89 },
 883         { rts_memset,     1, "memset",       3, _C89 },
 884         { rts_memcmp,     1, "memcmp",       3, _C89 },
 885 };
 886
 887 static ident *rts_idents[lengthof(rts_data)];
 888
 889 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 890
 891 void set_create_ld_ident(ident *(*func)(entity_t*))
 892 {
 893         create_ld_ident = func;
 894 }
 895
 896 /**
 897  * Handle GNU attributes for entities
 898  *
 899  * @param ent   the entity
 900  * @param decl  the routine declaration
 901  */
 902 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 903 {
 904         assert(is_declaration(entity));
 905         decl_modifiers_t modifiers = entity->declaration.modifiers;
 906
 907         if (is_method_entity(irentity)) {
 908                 if (modifiers & DM_PURE) {
 909                         set_entity_additional_properties(irentity, mtp_property_pure);
 910                 }
 911                 if (modifiers & DM_CONST) {
 912                         add_entity_additional_properties(irentity, mtp_property_const);
 913                 }
 914         }
 915         if (modifiers & DM_USED) {
 916                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 917         }
 918         if (modifiers & DM_WEAK) {
 919                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 920         }
 921 }
 922
 923 static bool is_main(entity_t *entity)
 924 {
 925         static symbol_t *sym_main = NULL;
 926         if (sym_main == NULL) {
 927                 sym_main = symbol_table_insert("main");
 928         }
 929
 930         if (entity->base.symbol != sym_main)
 931                 return false;
 932         /* must be in outermost scope */
 933         if (entity->base.parent_scope != &current_translation_unit->scope)
 934                 return false;
 935
 936         return true;
 937 }
 938
 939 /**
 940  * Creates an entity representing a function.
 941  *
 942  * @param entity       the function declaration/definition
 943  * @param owner_type   the owner type of this function, NULL
 944  *                     for global functions
 945  */
 946 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 947 {
 948         assert(entity->kind == ENTITY_FUNCTION);
 949         if (entity->function.irentity != NULL)
 950                 return entity->function.irentity;
 951
 952         switch (entity->function.btk) {
 953         case BUILTIN_NONE:
 954         case BUILTIN_LIBC:
 955         case BUILTIN_LIBC_CHECK:
 956                 break;
 957         default:
 958                 return NULL;
 959         }
 960
 961         if (is_main(entity)) {
 962                 /* force main to C linkage */
 963                 type_t *type = entity->declaration.type;
 964                 assert(is_type_function(type));
 965                 if (type->function.linkage != LINKAGE_C) {
 966                         type_t *new_type           = duplicate_type(type);
 967                         new_type->function.linkage = LINKAGE_C;
 968                         type                       = identify_new_type(new_type);
 969                         entity->declaration.type   = type;
 970                 }
 971         }
 972
 973         symbol_t *symbol = entity->base.symbol;
 974         ident    *id     = new_id_from_str(symbol->string);
 975
 976         /* already an entity defined? */
 977         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 978         bool const has_body = entity->function.statement != NULL;
 979         if (irentity != NULL) {
 980                 if (get_entity_visibility(irentity) == ir_visibility_external
 981                                 && has_body) {
 982                         set_entity_visibility(irentity, ir_visibility_default);
 983                 }
 984                 goto entity_created;
 985         }
 986
 987         ir_type *ir_type_method;
 988         if (entity->function.need_closure)
 989                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 990         else
 991                 ir_type_method = get_ir_type(entity->declaration.type);
 992
 993         bool nested_function = false;
 994         if (owner_type == NULL)
 995                 owner_type = get_glob_type();
 996         else
 997                 nested_function = true;
 998
 999         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1000         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1001
1002         ident *ld_id;
1003         if (nested_function)
1004                 ld_id = id_unique("inner.%u");
1005         else
1006                 ld_id = create_ld_ident(entity);
1007         set_entity_ld_ident(irentity, ld_id);
1008
1009         handle_decl_modifiers(irentity, entity);
1010
1011         if (! nested_function) {
1012                 /* static inline             => local
1013                  * extern inline             => local
1014                  * inline without definition => local
1015                  * inline with definition    => external_visible */
1016                 storage_class_tag_t const storage_class
1017                         = (storage_class_tag_t) entity->declaration.storage_class;
1018                 bool                const is_inline     = entity->function.is_inline;
1019
1020                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1021                     set_entity_visibility(irentity, ir_visibility_default);
1022                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1023                            (is_inline && has_body)) {
1024                     set_entity_visibility(irentity, ir_visibility_local);
1025                 } else if (has_body) {
1026                     set_entity_visibility(irentity, ir_visibility_default);
1027                 } else {
1028                     set_entity_visibility(irentity, ir_visibility_external);
1029                 }
1030         } else {
1031                 /* nested functions are always local */
1032                 set_entity_visibility(irentity, ir_visibility_local);
1033         }
1034
1035         /* We should check for file scope here, but as long as we compile C only
1036            this is not needed. */
1037         if (!freestanding && !has_body) {
1038                 /* check for a known runtime function */
1039                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1040                         if (id != rts_idents[i])
1041                                 continue;
1042
1043                         function_type_t *function_type
1044                                 = &entity->declaration.type->function;
1045                         /* rts_entities code can't handle a "wrong" number of parameters */
1046                         if (function_type->unspecified_parameters)
1047                                 continue;
1048
1049                         /* check number of parameters */
1050                         int n_params = count_parameters(function_type);
1051                         if (n_params != rts_data[i].n_params)
1052                                 continue;
1053
1054                         type_t *return_type = skip_typeref(function_type->return_type);
1055                         int     n_res       = return_type != type_void ? 1 : 0;
1056                         if (n_res != rts_data[i].n_res)
1057                                 continue;
1058
1059                         /* ignore those rts functions not necessary needed for current mode */
1060                         if ((c_mode & rts_data[i].flags) == 0)
1061                                 continue;
1062                         assert(rts_entities[rts_data[i].id] == NULL);
1063                         rts_entities[rts_data[i].id] = irentity;
1064                 }
1065         }
1066
1067         entitymap_insert(&entitymap, symbol, irentity);
1068
1069 entity_created:
1070         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1071         entity->function.irentity = irentity;
1072
1073         return irentity;
1074 }
1075
1076 /**
1077  * Creates a SymConst for a given entity.
1078  *
1079  * @param dbgi    debug info
1080  * @param entity  the entity
1081  */
1082 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1083 {
1084         assert(entity != NULL);
1085         union symconst_symbol sym;
1086         sym.entity_p = entity;
1087         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1088 }
1089
1090 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1091 {
1092         ir_mode *value_mode = get_irn_mode(value);
1093
1094         if (value_mode == dest_mode)
1095                 return value;
1096
1097         if (dest_mode == mode_b) {
1098                 ir_node *zero = new_Const(get_mode_null(value_mode));
1099                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_less_greater);
1100                 return cmp;
1101         }
1102
1103         return new_d_Conv(dbgi, value, dest_mode);
1104 }
1105
1106 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1107 {
1108         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1109 }
1110
1111 /**
1112  * Creates a SymConst node representing a wide string literal.
1113  *
1114  * @param literal   the wide string literal
1115  */
1116 static ir_node *wide_string_literal_to_firm(
1117                 const string_literal_expression_t *literal)
1118 {
1119         ir_type  *const global_type = get_glob_type();
1120         ir_type  *const elem_type   = ir_type_wchar_t;
1121         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1122         ir_type  *const type        = new_type_array(1, elem_type);
1123
1124         ident     *const id     = id_unique("str.%u");
1125         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1126         set_entity_ld_ident(entity, id);
1127         set_entity_visibility(entity, ir_visibility_private);
1128         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1129
1130         ir_mode      *const mode = get_type_mode(elem_type);
1131         const size_t        slen = wstrlen(&literal->value);
1132
1133         set_array_lower_bound_int(type, 0, 0);
1134         set_array_upper_bound_int(type, 0, slen);
1135         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1136         set_type_state(type, layout_fixed);
1137
1138         ir_initializer_t *initializer = create_initializer_compound(slen);
1139         const char              *p    = literal->value.begin;
1140         for (size_t i = 0; i < slen; ++i) {
1141                 assert(p < literal->value.begin + literal->value.size);
1142                 utf32             v   = read_utf8_char(&p);
1143                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1144                 ir_initializer_t *val = create_initializer_tarval(tv);
1145                 set_initializer_compound_value(initializer, i, val);
1146         }
1147         set_entity_initializer(entity, initializer);
1148
1149         return create_symconst(dbgi, entity);
1150 }
1151
1152 /**
1153  * Creates a SymConst node representing a string constant.
1154  *
1155  * @param src_pos    the source position of the string constant
1156  * @param id_prefix  a prefix for the name of the generated string constant
1157  * @param value      the value of the string constant
1158  */
1159 static ir_node *string_to_firm(const source_position_t *const src_pos,
1160                                const char *const id_prefix,
1161                                const string_t *const value)
1162 {
1163         ir_type  *const global_type = get_glob_type();
1164         dbg_info *const dbgi        = get_dbg_info(src_pos);
1165         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1166
1167         ident     *const id     = id_unique(id_prefix);
1168         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1169         set_entity_ld_ident(entity, id);
1170         set_entity_visibility(entity, ir_visibility_private);
1171         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1172
1173         ir_type *const elem_type = ir_type_const_char;
1174         ir_mode *const mode      = get_type_mode(elem_type);
1175
1176         const char* const string = value->begin;
1177         const size_t      slen   = value->size;
1178
1179         set_array_lower_bound_int(type, 0, 0);
1180         set_array_upper_bound_int(type, 0, slen);
1181         set_type_size_bytes(type, slen);
1182         set_type_state(type, layout_fixed);
1183
1184         ir_initializer_t *initializer = create_initializer_compound(slen);
1185         for (size_t i = 0; i < slen; ++i) {
1186                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1187                 ir_initializer_t *val = create_initializer_tarval(tv);
1188                 set_initializer_compound_value(initializer, i, val);
1189         }
1190         set_entity_initializer(entity, initializer);
1191
1192         return create_symconst(dbgi, entity);
1193 }
1194
1195 static bool try_create_integer(literal_expression_t *literal,
1196                                type_t *type, unsigned char base)
1197 {
1198         const char *string = literal->value.begin;
1199         size_t      size   = literal->value.size;
1200
1201         assert(type->kind == TYPE_ATOMIC);
1202         atomic_type_kind_t akind = type->atomic.akind;
1203
1204         ir_mode   *mode = atomic_modes[akind];
1205         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1206         if (tv == tarval_bad)
1207                 return false;
1208
1209         literal->base.type    = type;
1210         literal->target_value = tv;
1211         return true;
1212 }
1213
1214 static void create_integer_tarval(literal_expression_t *literal)
1215 {
1216         unsigned        us     = 0;
1217         unsigned        ls     = 0;
1218         const string_t *suffix = &literal->suffix;
1219         /* parse suffix */
1220         if (suffix->size > 0) {
1221                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1222                         if (*c == 'u' || *c == 'U') { ++us; }
1223                         if (*c == 'l' || *c == 'L') { ++ls; }
1224                 }
1225         }
1226
1227         unsigned base;
1228         switch (literal->base.kind) {
1229                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1230                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1231                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1232                 default: panic("invalid literal kind");
1233         }
1234
1235         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1236
1237         /* now try if the constant is small enough for some types */
1238         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1239         if (ls < 1) {
1240                 if (us == 0 && try_create_integer(literal, type_int, base))
1241                         goto finished;
1242                 if ((us == 1 || base != 10)
1243                                 && try_create_integer(literal, type_unsigned_int, base))
1244                         goto finished;
1245         }
1246         if (ls < 2) {
1247                 if (us == 0 && try_create_integer(literal, type_long, base))
1248                         goto finished;
1249                 if ((us == 1 || base != 10)
1250                                 && try_create_integer(literal, type_unsigned_long, base))
1251                         goto finished;
1252         }
1253         /* last try? then we should not report tarval_bad */
1254         if (us != 1 && base == 10)
1255                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1256         if (us == 0 && try_create_integer(literal, type_long_long, base))
1257                 goto finished;
1258
1259         /* last try */
1260         assert(us == 1 || base != 10);
1261         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1262         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1263         if (!res)
1264                 panic("internal error when parsing number literal");
1265
1266 finished:
1267         tarval_set_integer_overflow_mode(old_mode);
1268 }
1269
1270 void determine_literal_type(literal_expression_t *literal)
1271 {
1272         switch (literal->base.kind) {
1273         case EXPR_LITERAL_INTEGER:
1274         case EXPR_LITERAL_INTEGER_OCTAL:
1275         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1276                 create_integer_tarval(literal);
1277                 return;
1278         default:
1279                 break;
1280         }
1281 }
1282
1283 /**
1284  * Creates a Const node representing a constant.
1285  */
1286 static ir_node *literal_to_firm(const literal_expression_t *literal)
1287 {
1288         type_t     *type   = skip_typeref(literal->base.type);
1289         ir_mode    *mode   = get_ir_mode_storage(type);
1290         const char *string = literal->value.begin;
1291         size_t      size   = literal->value.size;
1292         ir_tarval  *tv;
1293
1294         switch (literal->base.kind) {
1295         case EXPR_LITERAL_WIDE_CHARACTER: {
1296                 utf32  v = read_utf8_char(&string);
1297                 char   buf[128];
1298                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1299
1300                 tv = new_tarval_from_str(buf, len, mode);
1301                 goto make_const;
1302         }
1303         case EXPR_LITERAL_CHARACTER: {
1304                 long long int v;
1305                 bool char_is_signed
1306                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1307                 if (size == 1 && char_is_signed) {
1308                         v = (signed char)string[0];
1309                 } else {
1310                         v = 0;
1311                         for (size_t i = 0; i < size; ++i) {
1312                                 v = (v << 8) | ((unsigned char)string[i]);
1313                         }
1314                 }
1315                 char   buf[128];
1316                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1317
1318                 tv = new_tarval_from_str(buf, len, mode);
1319                 goto make_const;
1320         }
1321         case EXPR_LITERAL_INTEGER:
1322         case EXPR_LITERAL_INTEGER_OCTAL:
1323         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1324                 assert(literal->target_value != NULL);
1325                 tv = literal->target_value;
1326                 goto make_const;
1327         case EXPR_LITERAL_FLOATINGPOINT:
1328                 tv = new_tarval_from_str(string, size, mode);
1329                 goto make_const;
1330         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1331                 char buffer[size + 2];
1332                 memcpy(buffer, "0x", 2);
1333                 memcpy(buffer+2, string, size);
1334                 tv = new_tarval_from_str(buffer, size+2, mode);
1335                 goto make_const;
1336         }
1337         case EXPR_LITERAL_BOOLEAN:
1338                 if (string[0] == 't') {
1339                         tv = get_mode_one(mode);
1340                 } else {
1341                         assert(string[0] == 'f');
1342                         tv = get_mode_null(mode);
1343                 }
1344                 goto make_const;
1345         case EXPR_LITERAL_MS_NOOP:
1346                 tv = get_mode_null(mode);
1347                 goto make_const;
1348         default:
1349                 break;
1350         }
1351         panic("Invalid literal kind found");
1352
1353 make_const: ;
1354         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1355         ir_node  *res        = new_d_Const(dbgi, tv);
1356         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1357         return create_conv(dbgi, res, mode_arith);
1358 }
1359
1360 /*
1361  * Allocate an area of size bytes aligned at alignment
1362  * at a frame type.
1363  */
1364 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1365 {
1366         static unsigned area_cnt = 0;
1367         char buf[32];
1368
1369         ir_type *tp = new_type_array(1, ir_type_char);
1370         set_array_bounds_int(tp, 0, 0, size);
1371         set_type_alignment_bytes(tp, alignment);
1372
1373         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1374         ident *name = new_id_from_str(buf);
1375         ir_entity *area = new_entity(frame_type, name, tp);
1376
1377         /* mark this entity as compiler generated */
1378         set_entity_compiler_generated(area, 1);
1379         return area;
1380 }
1381
1382 /**
1383  * Return a node representing a trampoline region
1384  * for a given function entity.
1385  *
1386  * @param dbgi    debug info
1387  * @param entity  the function entity
1388  */
1389 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1390 {
1391         ir_entity *region = NULL;
1392         int        i;
1393
1394         if (current_trampolines != NULL) {
1395                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1396                         if (current_trampolines[i].function == entity) {
1397                                 region = current_trampolines[i].region;
1398                                 break;
1399                         }
1400                 }
1401         } else {
1402                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1403         }
1404         ir_graph *irg = current_ir_graph;
1405         if (region == NULL) {
1406                 /* create a new region */
1407                 ir_type           *frame_tp = get_irg_frame_type(irg);
1408                 trampoline_region  reg;
1409                 reg.function = entity;
1410
1411                 reg.region   = alloc_trampoline(frame_tp,
1412                                                 be_params->trampoline_size,
1413                                                 be_params->trampoline_align);
1414                 ARR_APP1(trampoline_region, current_trampolines, reg);
1415                 region = reg.region;
1416         }
1417         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1418                                region);
1419 }
1420
1421 /**
1422  * Creates a trampoline for a function represented by an entity.
1423  *
1424  * @param dbgi    debug info
1425  * @param mode    the (reference) mode for the function address
1426  * @param entity  the function entity
1427  */
1428 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1429                                   ir_entity *entity)
1430 {
1431         assert(entity != NULL);
1432         ir_node *in[3];
1433         in[0] = get_trampoline_region(dbgi, entity);
1434         in[1] = create_symconst(dbgi, entity);
1435         in[2] = get_irg_frame(current_ir_graph);
1436
1437         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1438         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1439         return new_Proj(irn, mode, pn_Builtin_1_result);
1440 }
1441
1442 /**
1443  * Dereference an address.
1444  *
1445  * @param dbgi  debug info
1446  * @param type  the type of the dereferenced result (the points_to type)
1447  * @param addr  the address to dereference
1448  */
1449 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1450                                       ir_node *const addr)
1451 {
1452         ir_type *irtype = get_ir_type(type);
1453         if (is_compound_type(irtype)
1454                         || is_Method_type(irtype)
1455                         || is_Array_type(irtype)) {
1456                 return addr;
1457         }
1458
1459         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1460                                   ? cons_volatile : cons_none;
1461         ir_mode *const mode     = get_type_mode(irtype);
1462         ir_node *const memory   = get_store();
1463         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1464         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1465         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1466
1467         set_store(load_mem);
1468
1469         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1470         return create_conv(dbgi, load_res, mode_arithmetic);
1471 }
1472
1473 /**
1474  * Creates a strict Conv (to the node's mode) if necessary.
1475  *
1476  * @param dbgi  debug info
1477  * @param node  the node to strict conv
1478  */
1479 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1480 {
1481         ir_mode *mode = get_irn_mode(node);
1482
1483         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1484                 return node;
1485         if (!mode_is_float(mode))
1486                 return node;
1487
1488         /* check if there is already a Conv */
1489         if (is_Conv(node)) {
1490                 /* convert it into a strict Conv */
1491                 set_Conv_strict(node, 1);
1492                 return node;
1493         }
1494
1495         /* otherwise create a new one */
1496         return new_d_strictConv(dbgi, node, mode);
1497 }
1498
1499 /**
1500  * Returns the correct base address depending on whether it is a parameter or a
1501  * normal local variable.
1502  */
1503 static ir_node *get_local_frame(ir_entity *const ent)
1504 {
1505         ir_graph      *const irg   = current_ir_graph;
1506         const ir_type *const owner = get_entity_owner(ent);
1507         if (owner == current_outer_frame) {
1508                 assert(current_static_link != NULL);
1509                 return current_static_link;
1510         } else {
1511                 return get_irg_frame(irg);
1512         }
1513 }
1514
1515 /**
1516  * Keep all memory edges of the given block.
1517  */
1518 static void keep_all_memory(ir_node *block)
1519 {
1520         ir_node *old = get_cur_block();
1521
1522         set_cur_block(block);
1523         keep_alive(get_store());
1524         /* TODO: keep all memory edges from restricted pointers */
1525         set_cur_block(old);
1526 }
1527
1528 static ir_node *reference_expression_enum_value_to_firm(
1529                 const reference_expression_t *ref)
1530 {
1531         entity_t *entity = ref->entity;
1532         if (entity->enum_value.tv == NULL) {
1533                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1534                 assert(type->kind == TYPE_ENUM);
1535                 determine_enum_values(&type->enumt);
1536         }
1537
1538         return new_Const(entity->enum_value.tv);
1539 }
1540
1541 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1542 {
1543         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1544         entity_t *entity = ref->entity;
1545         assert(is_declaration(entity));
1546         type_t   *type   = skip_typeref(entity->declaration.type);
1547
1548         /* make sure the type is constructed */
1549         (void) get_ir_type(type);
1550
1551         if (entity->kind == ENTITY_FUNCTION
1552             && entity->function.btk != BUILTIN_NONE) {
1553                 ir_entity *irentity = get_function_entity(entity, NULL);
1554                 /* for gcc compatibility we have to produce (dummy) addresses for some
1555                  * builtins which don't have entities */
1556                 if (irentity == NULL) {
1557                         source_position_t const *const pos = &ref->base.source_position;
1558                         symbol_t          const *const sym = ref->entity->base.symbol;
1559                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1560
1561                         /* simply create a NULL pointer */
1562                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1563                         ir_node  *res  = new_Const(get_mode_null(mode));
1564
1565                         return res;
1566                 }
1567         }
1568
1569         switch ((declaration_kind_t) entity->declaration.kind) {
1570         case DECLARATION_KIND_UNKNOWN:
1571                 break;
1572
1573         case DECLARATION_KIND_LOCAL_VARIABLE: {
1574                 ir_mode *const mode  = get_ir_mode_storage(type);
1575                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1576                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1577         }
1578         case DECLARATION_KIND_PARAMETER: {
1579                 ir_mode *const mode  = get_ir_mode_storage(type);
1580                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1581                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1582         }
1583         case DECLARATION_KIND_FUNCTION: {
1584                 return create_symconst(dbgi, entity->function.irentity);
1585         }
1586         case DECLARATION_KIND_INNER_FUNCTION: {
1587                 ir_mode *const mode = get_ir_mode_storage(type);
1588                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1589                         /* inner function not using the closure */
1590                         return create_symconst(dbgi, entity->function.irentity);
1591                 } else {
1592                         /* need trampoline here */
1593                         return create_trampoline(dbgi, mode, entity->function.irentity);
1594                 }
1595         }
1596         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1597                 const variable_t *variable = &entity->variable;
1598                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1599                 return deref_address(dbgi, variable->base.type, addr);
1600         }
1601
1602         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1603                 ir_entity *irentity = entity->variable.v.entity;
1604                 ir_node   *frame    = get_local_frame(irentity);
1605                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1606                 return deref_address(dbgi, entity->declaration.type, sel);
1607         }
1608         case DECLARATION_KIND_PARAMETER_ENTITY: {
1609                 ir_entity *irentity = entity->parameter.v.entity;
1610                 ir_node   *frame    = get_local_frame(irentity);
1611                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1612                 return deref_address(dbgi, entity->declaration.type, sel);
1613         }
1614
1615         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1616                 return entity->variable.v.vla_base;
1617
1618         case DECLARATION_KIND_COMPOUND_MEMBER:
1619                 panic("not implemented reference type");
1620         }
1621
1622         panic("reference to declaration with unknown type found");
1623 }
1624
1625 static ir_node *reference_addr(const reference_expression_t *ref)
1626 {
1627         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1628         entity_t *entity = ref->entity;
1629         assert(is_declaration(entity));
1630
1631         switch((declaration_kind_t) entity->declaration.kind) {
1632         case DECLARATION_KIND_UNKNOWN:
1633                 break;
1634         case DECLARATION_KIND_PARAMETER:
1635         case DECLARATION_KIND_LOCAL_VARIABLE:
1636                 /* you can store to a local variable (so we don't panic but return NULL
1637                  * as an indicator for no real address) */
1638                 return NULL;
1639         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1640                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1641                 return addr;
1642         }
1643         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1644                 ir_entity *irentity = entity->variable.v.entity;
1645                 ir_node   *frame    = get_local_frame(irentity);
1646                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1647
1648                 return sel;
1649         }
1650         case DECLARATION_KIND_PARAMETER_ENTITY: {
1651                 ir_entity *irentity = entity->parameter.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
1658         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1659                 return entity->variable.v.vla_base;
1660
1661         case DECLARATION_KIND_FUNCTION: {
1662                 return create_symconst(dbgi, entity->function.irentity);
1663         }
1664
1665         case DECLARATION_KIND_INNER_FUNCTION: {
1666                 type_t  *const type = skip_typeref(entity->declaration.type);
1667                 ir_mode *const mode = get_ir_mode_storage(type);
1668                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1669                         /* inner function not using the closure */
1670                         return create_symconst(dbgi, entity->function.irentity);
1671                 } else {
1672                         /* need trampoline here */
1673                         return create_trampoline(dbgi, mode, entity->function.irentity);
1674                 }
1675         }
1676
1677         case DECLARATION_KIND_COMPOUND_MEMBER:
1678                 panic("not implemented reference type");
1679         }
1680
1681         panic("reference to declaration with unknown type found");
1682 }
1683
1684 /**
1685  * Transform calls to builtin functions.
1686  */
1687 static ir_node *process_builtin_call(const call_expression_t *call)
1688 {
1689         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1690
1691         assert(call->function->kind == EXPR_REFERENCE);
1692         reference_expression_t *builtin = &call->function->reference;
1693
1694         type_t *expr_type = skip_typeref(builtin->base.type);
1695         assert(is_type_pointer(expr_type));
1696
1697         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1698
1699         switch (builtin->entity->function.btk) {
1700         case BUILTIN_NONE:
1701                 break;
1702         case BUILTIN_ALLOCA: {
1703                 expression_t *argument = call->arguments->expression;
1704                 ir_node      *size     = expression_to_firm(argument);
1705
1706                 ir_node *store  = get_store();
1707                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1708                                               stack_alloc);
1709                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1710                 set_store(proj_m);
1711                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1712
1713                 return res;
1714         }
1715         case BUILTIN_INF: {
1716                 type_t    *type = function_type->function.return_type;
1717                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1718                 ir_tarval *tv   = get_mode_infinite(mode);
1719                 ir_node   *res  = new_d_Const(dbgi, tv);
1720                 return res;
1721         }
1722         case BUILTIN_NAN: {
1723                 /* Ignore string for now... */
1724                 assert(is_type_function(function_type));
1725                 type_t    *type = function_type->function.return_type;
1726                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1727                 ir_tarval *tv   = get_mode_NAN(mode);
1728                 ir_node   *res  = new_d_Const(dbgi, tv);
1729                 return res;
1730         }
1731         case BUILTIN_EXPECT: {
1732                 expression_t *argument = call->arguments->expression;
1733                 return _expression_to_firm(argument);
1734         }
1735         case BUILTIN_VA_END:
1736                 /* evaluate the argument of va_end for its side effects */
1737                 _expression_to_firm(call->arguments->expression);
1738                 return NULL;
1739         case BUILTIN_OBJECT_SIZE: {
1740                 /* determine value of "type" */
1741                 expression_t *type_expression = call->arguments->next->expression;
1742                 long          type_val        = fold_constant_to_int(type_expression);
1743                 type_t       *type            = function_type->function.return_type;
1744                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1745                 /* just produce a "I don't know" result */
1746                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1747                                                 get_mode_minus_one(mode);
1748
1749                 return new_d_Const(dbgi, result);
1750         }
1751         case BUILTIN_ROTL: {
1752                 ir_node *val  = expression_to_firm(call->arguments->expression);
1753                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1754                 ir_mode *mode = get_irn_mode(val);
1755                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1756         }
1757         case BUILTIN_ROTR: {
1758                 ir_node *val  = expression_to_firm(call->arguments->expression);
1759                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1760                 ir_mode *mode = get_irn_mode(val);
1761                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1762                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1763                 return new_d_Rotl(dbgi, val, sub, mode);
1764         }
1765         case BUILTIN_FIRM:
1766                 break;
1767         case BUILTIN_LIBC:
1768         case BUILTIN_LIBC_CHECK:
1769                 panic("builtin did not produce an entity");
1770         }
1771         panic("invalid builtin found");
1772 }
1773
1774 /**
1775  * Transform a call expression.
1776  * Handles some special cases, like alloca() calls, which must be resolved
1777  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1778  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1779  * handled right...
1780  */
1781 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1782 {
1783         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1784         assert(currently_reachable());
1785
1786         expression_t   *function = call->function;
1787         ir_node        *callee   = NULL;
1788         bool            firm_builtin = false;
1789         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1790         if (function->kind == EXPR_REFERENCE) {
1791                 const reference_expression_t *ref    = &function->reference;
1792                 entity_t                     *entity = ref->entity;
1793
1794                 if (entity->kind == ENTITY_FUNCTION) {
1795                         builtin_kind_t builtin = entity->function.btk;
1796                         if (builtin == BUILTIN_FIRM) {
1797                                 firm_builtin = true;
1798                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1799                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1800                                    && builtin != BUILTIN_LIBC_CHECK) {
1801                                 return process_builtin_call(call);
1802                         }
1803                 }
1804         }
1805         if (!firm_builtin)
1806                 callee = expression_to_firm(function);
1807
1808         type_t *type = skip_typeref(function->base.type);
1809         assert(is_type_pointer(type));
1810         pointer_type_t *pointer_type = &type->pointer;
1811         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1812         assert(is_type_function(points_to));
1813         function_type_t *function_type = &points_to->function;
1814
1815         int      n_parameters    = 0;
1816         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1817         ir_type *new_method_type = NULL;
1818         if (function_type->variadic || function_type->unspecified_parameters) {
1819                 const call_argument_t *argument = call->arguments;
1820                 for ( ; argument != NULL; argument = argument->next) {
1821                         ++n_parameters;
1822                 }
1823
1824                 /* we need to construct a new method type matching the call
1825                  * arguments... */
1826                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1827                 int n_res       = get_method_n_ress(ir_method_type);
1828                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1829                 set_method_calling_convention(new_method_type,
1830                                get_method_calling_convention(ir_method_type));
1831                 set_method_additional_properties(new_method_type,
1832                                get_method_additional_properties(ir_method_type));
1833                 set_method_variadicity(new_method_type,
1834                                        get_method_variadicity(ir_method_type));
1835
1836                 for (int i = 0; i < n_res; ++i) {
1837                         set_method_res_type(new_method_type, i,
1838                                             get_method_res_type(ir_method_type, i));
1839                 }
1840                 argument = call->arguments;
1841                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1842                         expression_t *expression = argument->expression;
1843                         ir_type      *irtype     = get_ir_type(expression->base.type);
1844                         set_method_param_type(new_method_type, i, irtype);
1845                 }
1846                 ir_method_type = new_method_type;
1847         } else {
1848                 n_parameters = get_method_n_params(ir_method_type);
1849         }
1850
1851         ir_node *in[n_parameters];
1852
1853         const call_argument_t *argument = call->arguments;
1854         for (int n = 0; n < n_parameters; ++n) {
1855                 expression_t *expression = argument->expression;
1856                 ir_node      *arg_node   = expression_to_firm(expression);
1857
1858                 type_t *arg_type = skip_typeref(expression->base.type);
1859                 if (!is_type_compound(arg_type)) {
1860                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1861                         arg_node      = create_conv(dbgi, arg_node, mode);
1862                         arg_node      = do_strict_conv(dbgi, arg_node);
1863                 }
1864
1865                 in[n] = arg_node;
1866
1867                 argument = argument->next;
1868         }
1869
1870         ir_node *store;
1871         if (function_type->modifiers & DM_CONST) {
1872                 store = get_irg_no_mem(current_ir_graph);
1873         } else {
1874                 store = get_store();
1875         }
1876
1877         ir_node *node;
1878         type_t  *return_type = skip_typeref(function_type->return_type);
1879         ir_node *result      = NULL;
1880         if (firm_builtin) {
1881                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1882                                      ir_method_type);
1883                 if (! (function_type->modifiers & DM_CONST)) {
1884                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1885                         set_store(mem);
1886                 }
1887
1888                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1889                         assert(is_type_scalar(return_type));
1890                         ir_mode *mode = get_ir_mode_storage(return_type);
1891                         result = new_Proj(node, mode, pn_Builtin_1_result);
1892                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1893                         result              = create_conv(NULL, result, mode_arith);
1894                 }
1895         } else {
1896                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1897                 if (! (function_type->modifiers & DM_CONST)) {
1898                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1899                         set_store(mem);
1900                 }
1901
1902                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1903                         ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1904
1905                         if (is_type_scalar(return_type)) {
1906                                 ir_mode *mode       = get_ir_mode_storage(return_type);
1907                                 result              = new_Proj(resproj, mode, 0);
1908                                 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1909                                 result              = create_conv(NULL, result, mode_arith);
1910                         } else {
1911                                 ir_mode *mode = mode_P_data;
1912                                 result        = new_Proj(resproj, mode, 0);
1913                         }
1914                 }
1915         }
1916
1917         if (function_type->modifiers & DM_NORETURN) {
1918                 /* A dead end:  Keep the Call and the Block.  Also place all further
1919                  * nodes into a new and unreachable block. */
1920                 keep_alive(node);
1921                 keep_alive(get_cur_block());
1922                 ir_node *block = new_Block(0, NULL);
1923                 set_cur_block(block);
1924         }
1925
1926         return result;
1927 }
1928
1929 static void statement_to_firm(statement_t *statement);
1930 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1931
1932 static ir_node *expression_to_addr(const expression_t *expression);
1933 static ir_node *create_condition_evaluation(const expression_t *expression,
1934                                             ir_node *true_block,
1935                                             ir_node *false_block);
1936
1937 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1938                          ir_node *value)
1939 {
1940         if (!is_type_compound(type)) {
1941                 ir_mode *mode = get_ir_mode_storage(type);
1942                 value         = create_conv(dbgi, value, mode);
1943                 value         = do_strict_conv(dbgi, value);
1944         }
1945
1946         ir_node *memory = get_store();
1947
1948         if (is_type_scalar(type)) {
1949                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1950                                       ? cons_volatile : cons_none;
1951                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1952                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1953                 set_store(store_mem);
1954         } else {
1955                 ir_type *irtype    = get_ir_type(type);
1956                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1957                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1958                 set_store(copyb_mem);
1959         }
1960 }
1961
1962 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1963 {
1964         ir_tarval *all_one   = get_mode_all_one(mode);
1965         int        mode_size = get_mode_size_bits(mode);
1966
1967         assert(offset >= 0);
1968         assert(size   >= 0);
1969         assert(offset + size <= mode_size);
1970         if (size == mode_size) {
1971                 return all_one;
1972         }
1973
1974         long       shiftr    = get_mode_size_bits(mode) - size;
1975         long       shiftl    = offset;
1976         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1977         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1978         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1979         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1980
1981         return mask1;
1982 }
1983
1984 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1985                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1986                 bool need_return)
1987 {
1988         ir_type *entity_type = get_entity_type(entity);
1989         ir_type *base_type   = get_primitive_base_type(entity_type);
1990         ir_mode *mode        = get_type_mode(base_type);
1991
1992         value = create_conv(dbgi, value, mode);
1993
1994         /* kill upper bits of value and shift to right position */
1995         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1996         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1997         unsigned  base_bits  = get_mode_size_bits(mode);
1998         unsigned  shiftwidth = base_bits - bitsize;
1999
2000         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
2001         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
2002
2003         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
2004         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
2005         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
2006
2007         /* load current value */
2008         ir_node   *mem             = get_store();
2009         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2010                                           set_volatile ? cons_volatile : cons_none);
2011         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2012         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2013         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2014         ir_tarval *inv_mask        = tarval_not(shift_mask);
2015         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2016         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2017
2018         /* construct new value and store */
2019         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2020         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2021                                          set_volatile ? cons_volatile : cons_none);
2022         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2023         set_store(store_mem);
2024
2025         if (!need_return)
2026                 return NULL;
2027
2028         ir_node *res_shr;
2029         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2030         if (mode_is_signed(mode)) {
2031                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2032         } else {
2033                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2034         }
2035         return res_shr;
2036 }
2037
2038 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2039                                          ir_node *addr)
2040 {
2041         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2042         entity_t *entity    = expression->compound_entry;
2043         type_t   *base_type = entity->declaration.type;
2044         ir_mode  *mode      = get_ir_mode_storage(base_type);
2045         ir_node  *mem       = get_store();
2046         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2047         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2048         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2049
2050         ir_mode  *amode     = mode;
2051         /* optimisation, since shifting in modes < machine_size is usually
2052          * less efficient */
2053         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2054                 amode = mode_uint;
2055         }
2056         unsigned amode_size = get_mode_size_bits(amode);
2057         load_res = create_conv(dbgi, load_res, amode);
2058
2059         set_store(load_mem);
2060
2061         /* kill upper bits */
2062         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2063         unsigned   bitoffset   = entity->compound_member.bit_offset;
2064         unsigned   bitsize     = entity->compound_member.bit_size;
2065         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2066         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2067         ir_node   *countl      = new_d_Const(dbgi, tvl);
2068         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2069
2070         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2071         assert(shift_bitsr <= amode_size);
2072         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2073         ir_node   *countr      = new_d_Const(dbgi, tvr);
2074         ir_node   *shiftr;
2075         if (mode_is_signed(mode)) {
2076                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2077         } else {
2078                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2079         }
2080
2081         type_t  *type    = expression->base.type;
2082         ir_mode *resmode = get_ir_mode_arithmetic(type);
2083         return create_conv(dbgi, shiftr, resmode);
2084 }
2085
2086 /* make sure the selected compound type is constructed */
2087 static void construct_select_compound(const select_expression_t *expression)
2088 {
2089         type_t *type = skip_typeref(expression->compound->base.type);
2090         if (is_type_pointer(type)) {
2091                 type = type->pointer.points_to;
2092         }
2093         (void) get_ir_type(type);
2094 }
2095
2096 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2097                                               ir_node *value, ir_node *addr)
2098 {
2099         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2100         type_t   *type = skip_typeref(expression->base.type);
2101
2102         if (!is_type_compound(type)) {
2103                 ir_mode  *mode = get_ir_mode_storage(type);
2104                 value          = create_conv(dbgi, value, mode);
2105                 value          = do_strict_conv(dbgi, value);
2106         }
2107
2108         if (expression->kind == EXPR_REFERENCE) {
2109                 const reference_expression_t *ref = &expression->reference;
2110
2111                 entity_t *entity = ref->entity;
2112                 assert(is_declaration(entity));
2113                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2114                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2115                         set_value(entity->variable.v.value_number, value);
2116                         return value;
2117                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2118                         set_value(entity->parameter.v.value_number, value);
2119                         return value;
2120                 }
2121         }
2122
2123         if (addr == NULL)
2124                 addr = expression_to_addr(expression);
2125         assert(addr != NULL);
2126
2127         if (expression->kind == EXPR_SELECT) {
2128                 const select_expression_t *select = &expression->select;
2129
2130                 construct_select_compound(select);
2131
2132                 entity_t *entity = select->compound_entry;
2133                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2134                 if (entity->compound_member.bitfield) {
2135                         ir_entity *irentity = entity->compound_member.entity;
2136                         bool       set_volatile
2137                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2138                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2139                                                        set_volatile, true);
2140                         return value;
2141                 }
2142         }
2143
2144         assign_value(dbgi, addr, type, value);
2145         return value;
2146 }
2147
2148 static void set_value_for_expression(const expression_t *expression,
2149                                      ir_node *value)
2150 {
2151         set_value_for_expression_addr(expression, value, NULL);
2152 }
2153
2154 static ir_node *get_value_from_lvalue(const expression_t *expression,
2155                                       ir_node *addr)
2156 {
2157         if (expression->kind == EXPR_REFERENCE) {
2158                 const reference_expression_t *ref = &expression->reference;
2159
2160                 entity_t *entity = ref->entity;
2161                 assert(entity->kind == ENTITY_VARIABLE
2162                                 || entity->kind == ENTITY_PARAMETER);
2163                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2164                 int value_number;
2165                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2166                         value_number = entity->variable.v.value_number;
2167                         assert(addr == NULL);
2168                         type_t  *type = skip_typeref(expression->base.type);
2169                         ir_mode *mode = get_ir_mode_storage(type);
2170                         ir_node *res  = get_value(value_number, mode);
2171                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2172                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2173                         value_number = entity->parameter.v.value_number;
2174                         assert(addr == NULL);
2175                         type_t  *type = skip_typeref(expression->base.type);
2176                         ir_mode *mode = get_ir_mode_storage(type);
2177                         ir_node *res  = get_value(value_number, mode);
2178                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2179                 }
2180         }
2181
2182         assert(addr != NULL);
2183         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2184
2185         ir_node *value;
2186         if (expression->kind == EXPR_SELECT &&
2187             expression->select.compound_entry->compound_member.bitfield) {
2188             construct_select_compound(&expression->select);
2189                 value = bitfield_extract_to_firm(&expression->select, addr);
2190         } else {
2191                 value = deref_address(dbgi, expression->base.type, addr);
2192         }
2193
2194         return value;
2195 }
2196
2197
2198 static ir_node *create_incdec(const unary_expression_t *expression)
2199 {
2200         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2201         const expression_t *value_expr = expression->value;
2202         ir_node            *addr       = expression_to_addr(value_expr);
2203         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2204
2205         type_t  *type = skip_typeref(expression->base.type);
2206         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2207
2208         ir_node *offset;
2209         if (is_type_pointer(type)) {
2210                 pointer_type_t *pointer_type = &type->pointer;
2211                 offset = get_type_size_node(pointer_type->points_to);
2212         } else {
2213                 assert(is_type_arithmetic(type));
2214                 offset = new_Const(get_mode_one(mode));
2215         }
2216
2217         ir_node *result;
2218         ir_node *store_value;
2219         switch(expression->base.kind) {
2220         case EXPR_UNARY_POSTFIX_INCREMENT:
2221                 result      = value;
2222                 store_value = new_d_Add(dbgi, value, offset, mode);
2223                 break;
2224         case EXPR_UNARY_POSTFIX_DECREMENT:
2225                 result      = value;
2226                 store_value = new_d_Sub(dbgi, value, offset, mode);
2227                 break;
2228         case EXPR_UNARY_PREFIX_INCREMENT:
2229                 result      = new_d_Add(dbgi, value, offset, mode);
2230                 store_value = result;
2231                 break;
2232         case EXPR_UNARY_PREFIX_DECREMENT:
2233                 result      = new_d_Sub(dbgi, value, offset, mode);
2234                 store_value = result;
2235                 break;
2236         default:
2237                 panic("no incdec expr in create_incdec");
2238         }
2239
2240         set_value_for_expression_addr(value_expr, store_value, addr);
2241
2242         return result;
2243 }
2244
2245 static bool is_local_variable(expression_t *expression)
2246 {
2247         if (expression->kind != EXPR_REFERENCE)
2248                 return false;
2249         reference_expression_t *ref_expr = &expression->reference;
2250         entity_t               *entity   = ref_expr->entity;
2251         if (entity->kind != ENTITY_VARIABLE)
2252                 return false;
2253         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2254         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2255 }
2256
2257 static ir_relation get_relation(const expression_kind_t kind)
2258 {
2259         switch(kind) {
2260         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2261         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2262         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2263         case EXPR_BINARY_ISLESS:
2264         case EXPR_BINARY_LESS:          return ir_relation_less;
2265         case EXPR_BINARY_ISLESSEQUAL:
2266         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2267         case EXPR_BINARY_ISGREATER:
2268         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2269         case EXPR_BINARY_ISGREATEREQUAL:
2270         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2271         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2272
2273         default:
2274                 break;
2275         }
2276         panic("trying to get pn_Cmp from non-comparison binexpr type");
2277 }
2278
2279 /**
2280  * Handle the assume optimizer hint: check if a Confirm
2281  * node can be created.
2282  *
2283  * @param dbi    debug info
2284  * @param expr   the IL assume expression
2285  *
2286  * we support here only some simple cases:
2287  *  - var rel const
2288  *  - const rel val
2289  *  - var rel var
2290  */
2291 static ir_node *handle_assume_compare(dbg_info *dbi,
2292                                       const binary_expression_t *expression)
2293 {
2294         expression_t *op1 = expression->left;
2295         expression_t *op2 = expression->right;
2296         entity_t     *var2, *var = NULL;
2297         ir_node      *res      = NULL;
2298         ir_relation   relation = get_relation(expression->base.kind);
2299
2300         if (is_local_variable(op1) && is_local_variable(op2)) {
2301                 var  = op1->reference.entity;
2302             var2 = op2->reference.entity;
2303
2304                 type_t  *const type = skip_typeref(var->declaration.type);
2305                 ir_mode *const mode = get_ir_mode_storage(type);
2306
2307                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2308                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2309
2310                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2311                 set_value(var2->variable.v.value_number, res);
2312
2313                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2314                 set_value(var->variable.v.value_number, res);
2315
2316                 return res;
2317         }
2318
2319         expression_t *con = NULL;
2320         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2321                 var = op1->reference.entity;
2322                 con = op2;
2323         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2324                 relation = get_inversed_relation(relation);
2325                 var = op2->reference.entity;
2326                 con = op1;
2327         }
2328
2329         if (var != NULL) {
2330                 type_t  *const type = skip_typeref(var->declaration.type);
2331                 ir_mode *const mode = get_ir_mode_storage(type);
2332
2333                 res = get_value(var->variable.v.value_number, mode);
2334                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2335                 set_value(var->variable.v.value_number, res);
2336         }
2337         return res;
2338 }
2339
2340 /**
2341  * Handle the assume optimizer hint.
2342  *
2343  * @param dbi    debug info
2344  * @param expr   the IL assume expression
2345  */
2346 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2347 {
2348         switch(expression->kind) {
2349         case EXPR_BINARY_EQUAL:
2350         case EXPR_BINARY_NOTEQUAL:
2351         case EXPR_BINARY_LESS:
2352         case EXPR_BINARY_LESSEQUAL:
2353         case EXPR_BINARY_GREATER:
2354         case EXPR_BINARY_GREATEREQUAL:
2355                 return handle_assume_compare(dbi, &expression->binary);
2356         default:
2357                 return NULL;
2358         }
2359 }
2360
2361 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2362                             type_t *from_type, type_t *type)
2363 {
2364         type = skip_typeref(type);
2365         if (type == type_void) {
2366                 /* make sure firm type is constructed */
2367                 (void) get_ir_type(type);
2368                 return NULL;
2369         }
2370         if (!is_type_scalar(type)) {
2371                 /* make sure firm type is constructed */
2372                 (void) get_ir_type(type);
2373                 return value_node;
2374         }
2375
2376         from_type     = skip_typeref(from_type);
2377         ir_mode *mode = get_ir_mode_storage(type);
2378         /* check for conversion from / to __based types */
2379         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2380                 const variable_t *from_var = from_type->pointer.base_variable;
2381                 const variable_t *to_var   = type->pointer.base_variable;
2382                 if (from_var != to_var) {
2383                         if (from_var != NULL) {
2384                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2385                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2386                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2387                         }
2388                         if (to_var != NULL) {
2389                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2390                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2391                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2392                         }
2393                 }
2394         }
2395
2396         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2397                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2398                  * convert to mode_b so we only get a 0/1 value */
2399                 value_node = create_conv(dbgi, value_node, mode_b);
2400         }
2401
2402         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2403         ir_node *node       = create_conv(dbgi, value_node, mode);
2404         node                = do_strict_conv(dbgi, node);
2405         node                = create_conv(dbgi, node, mode_arith);
2406
2407         return node;
2408 }
2409
2410 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2411 {
2412         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2413         type_t   *type = skip_typeref(expression->base.type);
2414
2415         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2416                 return expression_to_addr(expression->value);
2417
2418         const expression_t *value = expression->value;
2419
2420         switch(expression->base.kind) {
2421         case EXPR_UNARY_NEGATE: {
2422                 ir_node *value_node = expression_to_firm(value);
2423                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2424                 return new_d_Minus(dbgi, value_node, mode);
2425         }
2426         case EXPR_UNARY_PLUS:
2427                 return expression_to_firm(value);
2428         case EXPR_UNARY_BITWISE_NEGATE: {
2429                 ir_node *value_node = expression_to_firm(value);
2430                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2431                 return new_d_Not(dbgi, value_node, mode);
2432         }
2433         case EXPR_UNARY_NOT: {
2434                 ir_node *value_node = _expression_to_firm(value);
2435                 value_node          = create_conv(dbgi, value_node, mode_b);
2436                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2437                 return res;
2438         }
2439         case EXPR_UNARY_DEREFERENCE: {
2440                 ir_node *value_node = expression_to_firm(value);
2441                 type_t  *value_type = skip_typeref(value->base.type);
2442                 assert(is_type_pointer(value_type));
2443
2444                 /* check for __based */
2445                 const variable_t *const base_var = value_type->pointer.base_variable;
2446                 if (base_var != NULL) {
2447                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2448                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2449                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2450                 }
2451                 type_t  *points_to  = value_type->pointer.points_to;
2452                 return deref_address(dbgi, points_to, value_node);
2453         }
2454         case EXPR_UNARY_POSTFIX_INCREMENT:
2455         case EXPR_UNARY_POSTFIX_DECREMENT:
2456         case EXPR_UNARY_PREFIX_INCREMENT:
2457         case EXPR_UNARY_PREFIX_DECREMENT:
2458                 return create_incdec(expression);
2459         case EXPR_UNARY_CAST: {
2460                 ir_node *value_node = expression_to_firm(value);
2461                 type_t  *from_type  = value->base.type;
2462                 return create_cast(dbgi, value_node, from_type, type);
2463         }
2464         case EXPR_UNARY_ASSUME:
2465                 return handle_assume(dbgi, value);
2466
2467         default:
2468                 break;
2469         }
2470         panic("invalid UNEXPR type found");
2471 }
2472
2473 /**
2474  * produces a 0/1 depending of the value of a mode_b node
2475  */
2476 static ir_node *produce_condition_result(const expression_t *expression,
2477                                          ir_mode *mode, dbg_info *dbgi)
2478 {
2479         ir_node *const one_block  = new_immBlock();
2480         ir_node *const zero_block = new_immBlock();
2481         create_condition_evaluation(expression, one_block, zero_block);
2482         mature_immBlock(one_block);
2483         mature_immBlock(zero_block);
2484
2485         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2486         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2487         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2488         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2489         set_cur_block(block);
2490
2491         ir_node *const one   = new_Const(get_mode_one(mode));
2492         ir_node *const zero  = new_Const(get_mode_null(mode));
2493         ir_node *const in[2] = { one, zero };
2494         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2495
2496         return val;
2497 }
2498
2499 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2500                 ir_node *value, type_t *type)
2501 {
2502         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2503         assert(is_type_pointer(type));
2504         pointer_type_t *const pointer_type = &type->pointer;
2505         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2506         ir_node        *      elem_size    = get_type_size_node(points_to);
2507         elem_size                          = create_conv(dbgi, elem_size, mode);
2508         value                              = create_conv(dbgi, value,     mode);
2509         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2510         return mul;
2511 }
2512
2513 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2514                           ir_node *left, ir_node *right)
2515 {
2516         ir_mode  *mode;
2517         type_t   *type_left  = skip_typeref(expression->left->base.type);
2518         type_t   *type_right = skip_typeref(expression->right->base.type);
2519
2520         expression_kind_t kind = expression->base.kind;
2521
2522         switch (kind) {
2523         case EXPR_BINARY_SHIFTLEFT:
2524         case EXPR_BINARY_SHIFTRIGHT:
2525         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2526         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2527                 mode  = get_ir_mode_arithmetic(expression->base.type);
2528                 right = create_conv(dbgi, right, mode_uint);
2529                 break;
2530
2531         case EXPR_BINARY_SUB:
2532                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2533                         const pointer_type_t *const ptr_type = &type_left->pointer;
2534
2535                         mode = get_ir_mode_arithmetic(expression->base.type);
2536                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2537                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2538                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2539                         ir_node *const no_mem    = new_NoMem();
2540                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2541                                                                                                    mode, op_pin_state_floats);
2542                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2543                 }
2544                 /* fallthrough */
2545         case EXPR_BINARY_SUB_ASSIGN:
2546                 if (is_type_pointer(type_left)) {
2547                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2548                         mode  = get_ir_mode_arithmetic(type_left);
2549                         break;
2550                 }
2551                 goto normal_node;
2552
2553         case EXPR_BINARY_ADD:
2554         case EXPR_BINARY_ADD_ASSIGN:
2555                 if (is_type_pointer(type_left)) {
2556                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2557                         mode  = get_ir_mode_arithmetic(type_left);
2558                         break;
2559                 } else if (is_type_pointer(type_right)) {
2560                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2561                         mode  = get_ir_mode_arithmetic(type_right);
2562                         break;
2563                 }
2564                 goto normal_node;
2565
2566         default:
2567 normal_node:
2568                 mode = get_ir_mode_arithmetic(type_right);
2569                 left = create_conv(dbgi, left, mode);
2570                 break;
2571         }
2572
2573         switch (kind) {
2574         case EXPR_BINARY_ADD_ASSIGN:
2575         case EXPR_BINARY_ADD:
2576                 return new_d_Add(dbgi, left, right, mode);
2577         case EXPR_BINARY_SUB_ASSIGN:
2578         case EXPR_BINARY_SUB:
2579                 return new_d_Sub(dbgi, left, right, mode);
2580         case EXPR_BINARY_MUL_ASSIGN:
2581         case EXPR_BINARY_MUL:
2582                 return new_d_Mul(dbgi, left, right, mode);
2583         case EXPR_BINARY_BITWISE_AND:
2584         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2585                 return new_d_And(dbgi, left, right, mode);
2586         case EXPR_BINARY_BITWISE_OR:
2587         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2588                 return new_d_Or(dbgi, left, right, mode);
2589         case EXPR_BINARY_BITWISE_XOR:
2590         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2591                 return new_d_Eor(dbgi, left, right, mode);
2592         case EXPR_BINARY_SHIFTLEFT:
2593         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2594                 return new_d_Shl(dbgi, left, right, mode);
2595         case EXPR_BINARY_SHIFTRIGHT:
2596         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2597                 if (mode_is_signed(mode)) {
2598                         return new_d_Shrs(dbgi, left, right, mode);
2599                 } else {
2600                         return new_d_Shr(dbgi, left, right, mode);
2601                 }
2602         case EXPR_BINARY_DIV:
2603         case EXPR_BINARY_DIV_ASSIGN: {
2604                 ir_node *pin = new_Pin(new_NoMem());
2605                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2606                                          op_pin_state_floats);
2607                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2608                 return res;
2609         }
2610         case EXPR_BINARY_MOD:
2611         case EXPR_BINARY_MOD_ASSIGN: {
2612                 ir_node *pin = new_Pin(new_NoMem());
2613                 assert(!mode_is_float(mode));
2614                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2615                                          op_pin_state_floats);
2616                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2617                 return res;
2618         }
2619         default:
2620                 panic("unexpected expression kind");
2621         }
2622 }
2623
2624 static ir_node *create_lazy_op(const binary_expression_t *expression)
2625 {
2626         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2627         type_t   *type = skip_typeref(expression->base.type);
2628         ir_mode  *mode = get_ir_mode_arithmetic(type);
2629
2630         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2631                 bool val = fold_constant_to_bool(expression->left);
2632                 expression_kind_t ekind = expression->base.kind;
2633                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2634                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2635                         if (!val) {
2636                                 return new_Const(get_mode_null(mode));
2637                         }
2638                 } else {
2639                         if (val) {
2640                                 return new_Const(get_mode_one(mode));
2641                         }
2642                 }
2643
2644                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2645                         bool valr = fold_constant_to_bool(expression->right);
2646                         return create_Const_from_bool(mode, valr);
2647                 }
2648
2649                 return produce_condition_result(expression->right, mode, dbgi);
2650         }
2651
2652         return produce_condition_result((const expression_t*) expression, mode,
2653                                         dbgi);
2654 }
2655
2656 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2657                                             ir_node *right, ir_mode *mode);
2658
2659 static ir_node *create_assign_binop(const binary_expression_t *expression)
2660 {
2661         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2662         const expression_t *left_expr = expression->left;
2663         type_t             *type      = skip_typeref(left_expr->base.type);
2664         ir_node            *right     = expression_to_firm(expression->right);
2665         ir_node            *left_addr = expression_to_addr(left_expr);
2666         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2667         ir_node            *result    = create_op(dbgi, expression, left, right);
2668
2669         result = create_cast(dbgi, result, expression->right->base.type, type);
2670         result = do_strict_conv(dbgi, result);
2671
2672         result = set_value_for_expression_addr(left_expr, result, left_addr);
2673
2674         if (!is_type_compound(type)) {
2675                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2676                 result = create_conv(dbgi, result, mode_arithmetic);
2677         }
2678         return result;
2679 }
2680
2681 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2682 {
2683         expression_kind_t kind = expression->base.kind;
2684
2685         switch(kind) {
2686         case EXPR_BINARY_EQUAL:
2687         case EXPR_BINARY_NOTEQUAL:
2688         case EXPR_BINARY_LESS:
2689         case EXPR_BINARY_LESSEQUAL:
2690         case EXPR_BINARY_GREATER:
2691         case EXPR_BINARY_GREATEREQUAL:
2692         case EXPR_BINARY_ISGREATER:
2693         case EXPR_BINARY_ISGREATEREQUAL:
2694         case EXPR_BINARY_ISLESS:
2695         case EXPR_BINARY_ISLESSEQUAL:
2696         case EXPR_BINARY_ISLESSGREATER:
2697         case EXPR_BINARY_ISUNORDERED: {
2698                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2699                 ir_node    *left     = expression_to_firm(expression->left);
2700                 ir_node    *right    = expression_to_firm(expression->right);
2701                 ir_relation relation = get_relation(kind);
2702                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2703                 return cmp;
2704         }
2705         case EXPR_BINARY_ASSIGN: {
2706                 ir_node *addr  = expression_to_addr(expression->left);
2707                 ir_node *right = expression_to_firm(expression->right);
2708                 ir_node *res
2709                         = set_value_for_expression_addr(expression->left, right, addr);
2710
2711                 type_t  *type            = skip_typeref(expression->base.type);
2712                 if (!is_type_compound(type)) {
2713                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2714                         res                      = create_conv(NULL, res, mode_arithmetic);
2715                 }
2716                 return res;
2717         }
2718         case EXPR_BINARY_ADD:
2719         case EXPR_BINARY_SUB:
2720         case EXPR_BINARY_MUL:
2721         case EXPR_BINARY_DIV:
2722         case EXPR_BINARY_MOD:
2723         case EXPR_BINARY_BITWISE_AND:
2724         case EXPR_BINARY_BITWISE_OR:
2725         case EXPR_BINARY_BITWISE_XOR:
2726         case EXPR_BINARY_SHIFTLEFT:
2727         case EXPR_BINARY_SHIFTRIGHT:
2728         {
2729                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2730                 ir_node  *left  = expression_to_firm(expression->left);
2731                 ir_node  *right = expression_to_firm(expression->right);
2732                 return create_op(dbgi, expression, left, right);
2733         }
2734         case EXPR_BINARY_LOGICAL_AND:
2735         case EXPR_BINARY_LOGICAL_OR:
2736                 return create_lazy_op(expression);
2737         case EXPR_BINARY_COMMA:
2738                 /* create side effects of left side */
2739                 (void) expression_to_firm(expression->left);
2740                 return _expression_to_firm(expression->right);
2741
2742         case EXPR_BINARY_ADD_ASSIGN:
2743         case EXPR_BINARY_SUB_ASSIGN:
2744         case EXPR_BINARY_MUL_ASSIGN:
2745         case EXPR_BINARY_MOD_ASSIGN:
2746         case EXPR_BINARY_DIV_ASSIGN:
2747         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2748         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2749         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2750         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2751         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2752                 return create_assign_binop(expression);
2753         default:
2754                 panic("TODO binexpr type");
2755         }
2756 }
2757
2758 static ir_node *array_access_addr(const array_access_expression_t *expression)
2759 {
2760         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2761         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2762         ir_node  *offset      = expression_to_firm(expression->index);
2763         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2764         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2765         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2766
2767         return result;
2768 }
2769
2770 static ir_node *array_access_to_firm(
2771                 const array_access_expression_t *expression)
2772 {
2773         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2774         ir_node  *addr   = array_access_addr(expression);
2775         type_t   *type   = revert_automatic_type_conversion(
2776                         (const expression_t*) expression);
2777         type             = skip_typeref(type);
2778
2779         return deref_address(dbgi, type, addr);
2780 }
2781
2782 static long get_offsetof_offset(const offsetof_expression_t *expression)
2783 {
2784         type_t *orig_type = expression->type;
2785         long    offset    = 0;
2786
2787         designator_t *designator = expression->designator;
2788         for ( ; designator != NULL; designator = designator->next) {
2789                 type_t *type = skip_typeref(orig_type);
2790                 /* be sure the type is constructed */
2791                 (void) get_ir_type(type);
2792
2793                 if (designator->symbol != NULL) {
2794                         assert(is_type_compound(type));
2795                         symbol_t *symbol = designator->symbol;
2796
2797                         compound_t *compound = type->compound.compound;
2798                         entity_t   *iter     = compound->members.entities;
2799                         for ( ; iter != NULL; iter = iter->base.next) {
2800                                 if (iter->base.symbol == symbol) {
2801                                         break;
2802                                 }
2803                         }
2804                         assert(iter != NULL);
2805
2806                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2807                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2808                         offset += get_entity_offset(iter->compound_member.entity);
2809
2810                         orig_type = iter->declaration.type;
2811                 } else {
2812                         expression_t *array_index = designator->array_index;
2813                         assert(designator->array_index != NULL);
2814                         assert(is_type_array(type));
2815
2816                         long index         = fold_constant_to_int(array_index);
2817                         ir_type *arr_type  = get_ir_type(type);
2818                         ir_type *elem_type = get_array_element_type(arr_type);
2819                         long     elem_size = get_type_size_bytes(elem_type);
2820
2821                         offset += index * elem_size;
2822
2823                         orig_type = type->array.element_type;
2824                 }
2825         }
2826
2827         return offset;
2828 }
2829
2830 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2831 {
2832         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2833         long       offset = get_offsetof_offset(expression);
2834         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2835         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2836
2837         return new_d_Const(dbgi, tv);
2838 }
2839
2840 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2841                                      ir_entity *entity, type_t *type);
2842
2843 static ir_node *compound_literal_to_firm(
2844                 const compound_literal_expression_t *expression)
2845 {
2846         type_t *type = expression->type;
2847
2848         /* create an entity on the stack */
2849         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2850
2851         ident     *const id     = id_unique("CompLit.%u");
2852         ir_type   *const irtype = get_ir_type(type);
2853         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2854         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2855         set_entity_ld_ident(entity, id);
2856
2857         /* create initialisation code */
2858         initializer_t *initializer = expression->initializer;
2859         create_local_initializer(initializer, dbgi, entity, type);
2860
2861         /* create a sel for the compound literal address */
2862         ir_node *frame = get_irg_frame(current_ir_graph);
2863         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2864         return sel;
2865 }
2866
2867 /**
2868  * Transform a sizeof expression into Firm code.
2869  */
2870 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2871 {
2872         type_t *const type = skip_typeref(expression->type);
2873         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2874         if (is_type_array(type) && type->array.is_vla
2875                         && expression->tp_expression != NULL) {
2876                 expression_to_firm(expression->tp_expression);
2877         }
2878         /* strange gnu extensions: sizeof(function) == 1 */
2879         if (is_type_function(type)) {
2880                 ir_mode *mode = get_ir_mode_storage(type_size_t);
2881                 return new_Const(get_mode_one(mode));
2882         }
2883
2884         return get_type_size_node(type);
2885 }
2886
2887 static entity_t *get_expression_entity(const expression_t *expression)
2888 {
2889         if (expression->kind != EXPR_REFERENCE)
2890                 return NULL;
2891
2892         return expression->reference.entity;
2893 }
2894
2895 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2896 {
2897         switch(entity->kind) {
2898         DECLARATION_KIND_CASES
2899                 return entity->declaration.alignment;
2900         case ENTITY_STRUCT:
2901         case ENTITY_UNION:
2902                 return entity->compound.alignment;
2903         case ENTITY_TYPEDEF:
2904                 return entity->typedefe.alignment;
2905         default:
2906                 break;
2907         }
2908         return 0;
2909 }
2910
2911 /**
2912  * Transform an alignof expression into Firm code.
2913  */
2914 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2915 {
2916         unsigned alignment = 0;
2917
2918         const expression_t *tp_expression = expression->tp_expression;
2919         if (tp_expression != NULL) {
2920                 entity_t *entity = get_expression_entity(tp_expression);
2921                 if (entity != NULL) {
2922                         if (entity->kind == ENTITY_FUNCTION) {
2923                                 /* a gnu-extension */
2924                                 alignment = 1;
2925                         } else {
2926                                 alignment = get_cparser_entity_alignment(entity);
2927                         }
2928                 }
2929         }
2930
2931         if (alignment == 0) {
2932                 type_t *type = expression->type;
2933                 alignment = get_type_alignment(type);
2934         }
2935
2936         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2937         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2938         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2939         return new_d_Const(dbgi, tv);
2940 }
2941
2942 static void init_ir_types(void);
2943
2944 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2945 {
2946         assert(is_type_valid(skip_typeref(expression->base.type)));
2947
2948         bool constant_folding_old = constant_folding;
2949         constant_folding = true;
2950
2951         init_ir_types();
2952
2953         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2954
2955         ir_graph *old_current_ir_graph = current_ir_graph;
2956         current_ir_graph = get_const_code_irg();
2957
2958         ir_node *cnst = expression_to_firm(expression);
2959         current_ir_graph = old_current_ir_graph;
2960
2961         if (!is_Const(cnst)) {
2962                 panic("couldn't fold constant");
2963         }
2964
2965         constant_folding = constant_folding_old;
2966
2967         return get_Const_tarval(cnst);
2968 }
2969
2970 /* this function is only used in parser.c, but it relies on libfirm functionality */
2971 bool constant_is_negative(const expression_t *expression)
2972 {
2973         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2974         ir_tarval *tv = fold_constant_to_tarval(expression);
2975         return tarval_is_negative(tv);
2976 }
2977
2978 long fold_constant_to_int(const expression_t *expression)
2979 {
2980         if (expression->kind == EXPR_ERROR)
2981                 return 0;
2982
2983         ir_tarval *tv = fold_constant_to_tarval(expression);
2984         if (!tarval_is_long(tv)) {
2985                 panic("result of constant folding is not integer");
2986         }
2987
2988         return get_tarval_long(tv);
2989 }
2990
2991 bool fold_constant_to_bool(const expression_t *expression)
2992 {
2993         if (expression->kind == EXPR_ERROR)
2994                 return false;
2995         ir_tarval *tv = fold_constant_to_tarval(expression);
2996         return !tarval_is_null(tv);
2997 }
2998
2999 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3000 {
3001         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3002
3003         /* first try to fold a constant condition */
3004         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3005                 bool val = fold_constant_to_bool(expression->condition);
3006                 if (val) {
3007                         expression_t *true_expression = expression->true_expression;
3008                         if (true_expression == NULL)
3009                                 true_expression = expression->condition;
3010                         return expression_to_firm(true_expression);
3011                 } else {
3012                         return expression_to_firm(expression->false_expression);
3013                 }
3014         }
3015
3016         ir_node *const true_block  = new_immBlock();
3017         ir_node *const false_block = new_immBlock();
3018         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3019         mature_immBlock(true_block);
3020         mature_immBlock(false_block);
3021
3022         set_cur_block(true_block);
3023         ir_node *true_val;
3024         if (expression->true_expression != NULL) {
3025                 true_val = expression_to_firm(expression->true_expression);
3026         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3027                 true_val = cond_expr;
3028         } else {
3029                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3030                  * comparison.  Generate a "1" as value for the true branch. */
3031                 true_val = new_Const(get_mode_one(mode_Is));
3032         }
3033         ir_node *const true_jmp = new_d_Jmp(dbgi);
3034
3035         set_cur_block(false_block);
3036         ir_node *const false_val = expression_to_firm(expression->false_expression);
3037         ir_node *const false_jmp = new_d_Jmp(dbgi);
3038
3039         /* create the common block */
3040         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3041         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3042         set_cur_block(block);
3043
3044         /* TODO improve static semantics, so either both or no values are NULL */
3045         if (true_val == NULL || false_val == NULL)
3046                 return NULL;
3047
3048         ir_node *const in[2] = { true_val, false_val };
3049         type_t  *const type  = skip_typeref(expression->base.type);
3050         ir_mode *mode;
3051         if (is_type_compound(type)) {
3052                 mode = mode_P;
3053         } else {
3054                 mode = get_ir_mode_arithmetic(type);
3055         }
3056         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3057
3058         return val;
3059 }
3060
3061 /**
3062  * Returns an IR-node representing the address of a field.
3063  */
3064 static ir_node *select_addr(const select_expression_t *expression)
3065 {
3066         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3067
3068         construct_select_compound(expression);
3069
3070         ir_node *compound_addr = expression_to_firm(expression->compound);
3071
3072         entity_t *entry = expression->compound_entry;
3073         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3074         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3075
3076         if (constant_folding) {
3077                 ir_mode *mode = get_irn_mode(compound_addr);
3078                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3079                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3080                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3081         } else {
3082                 ir_entity *irentity = entry->compound_member.entity;
3083                 assert(irentity != NULL);
3084                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3085         }
3086 }
3087
3088 static ir_node *select_to_firm(const select_expression_t *expression)
3089 {
3090         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3091         ir_node  *addr = select_addr(expression);
3092         type_t   *type = revert_automatic_type_conversion(
3093                         (const expression_t*) expression);
3094         type           = skip_typeref(type);
3095
3096         entity_t *entry = expression->compound_entry;
3097         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3098
3099         if (entry->compound_member.bitfield) {
3100                 return bitfield_extract_to_firm(expression, addr);
3101         }
3102
3103         return deref_address(dbgi, type, addr);
3104 }
3105
3106 /* Values returned by __builtin_classify_type. */
3107 typedef enum gcc_type_class
3108 {
3109         no_type_class = -1,
3110         void_type_class,
3111         integer_type_class,
3112         char_type_class,
3113         enumeral_type_class,
3114         boolean_type_class,
3115         pointer_type_class,
3116         reference_type_class,
3117         offset_type_class,
3118         real_type_class,
3119         complex_type_class,
3120         function_type_class,
3121         method_type_class,
3122         record_type_class,
3123         union_type_class,
3124         array_type_class,
3125         string_type_class,
3126         set_type_class,
3127         file_type_class,
3128         lang_type_class
3129 } gcc_type_class;
3130
3131 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3132 {
3133         type_t *type = expr->type_expression->base.type;
3134
3135         /* FIXME gcc returns different values depending on whether compiling C or C++
3136          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3137         gcc_type_class tc;
3138         for (;;) {
3139                 type = skip_typeref(type);
3140                 switch (type->kind) {
3141                         case TYPE_ATOMIC: {
3142                                 const atomic_type_t *const atomic_type = &type->atomic;
3143                                 switch (atomic_type->akind) {
3144                                         /* should not be reached */
3145                                         case ATOMIC_TYPE_INVALID:
3146                                                 tc = no_type_class;
3147                                                 goto make_const;
3148
3149                                         /* gcc cannot do that */
3150                                         case ATOMIC_TYPE_VOID:
3151                                                 tc = void_type_class;
3152                                                 goto make_const;
3153
3154                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3155                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3156                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3157                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3158                                         case ATOMIC_TYPE_SHORT:
3159                                         case ATOMIC_TYPE_USHORT:
3160                                         case ATOMIC_TYPE_INT:
3161                                         case ATOMIC_TYPE_UINT:
3162                                         case ATOMIC_TYPE_LONG:
3163                                         case ATOMIC_TYPE_ULONG:
3164                                         case ATOMIC_TYPE_LONGLONG:
3165                                         case ATOMIC_TYPE_ULONGLONG:
3166                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3167                                                 tc = integer_type_class;
3168                                                 goto make_const;
3169
3170                                         case ATOMIC_TYPE_FLOAT:
3171                                         case ATOMIC_TYPE_DOUBLE:
3172                                         case ATOMIC_TYPE_LONG_DOUBLE:
3173                                                 tc = real_type_class;
3174                                                 goto make_const;
3175                                 }
3176                                 panic("Unexpected atomic type in classify_type_to_firm().");
3177                         }
3178
3179                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3180                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3181                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3182                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3183                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3184                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3185                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3186
3187                         /* gcc handles this as integer */
3188                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3189
3190                         /* gcc classifies the referenced type */
3191                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3192
3193                         /* typedef/typeof should be skipped already */
3194                         case TYPE_TYPEDEF:
3195                         case TYPE_TYPEOF:
3196                         case TYPE_ERROR:
3197                                 break;
3198                 }
3199                 panic("unexpected TYPE classify_type_to_firm().");
3200         }
3201
3202 make_const:;
3203         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3204         ir_tarval *const tv   = new_tarval_from_long(tc, mode_int);
3205         return new_d_Const(dbgi, tv);
3206 }
3207
3208 static ir_node *function_name_to_firm(
3209                 const funcname_expression_t *const expr)
3210 {
3211         switch(expr->kind) {
3212         case FUNCNAME_FUNCTION:
3213         case FUNCNAME_PRETTY_FUNCTION:
3214         case FUNCNAME_FUNCDNAME:
3215                 if (current_function_name == NULL) {
3216                         const source_position_t *const src_pos = &expr->base.source_position;
3217                         const char    *name  = current_function_entity->base.symbol->string;
3218                         const string_t string = { name, strlen(name) + 1 };
3219                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3220                 }
3221                 return current_function_name;
3222         case FUNCNAME_FUNCSIG:
3223                 if (current_funcsig == NULL) {
3224                         const source_position_t *const src_pos = &expr->base.source_position;
3225                         ir_entity *ent = get_irg_entity(current_ir_graph);
3226                         const char *const name = get_entity_ld_name(ent);
3227                         const string_t string = { name, strlen(name) + 1 };
3228                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3229                 }
3230                 return current_funcsig;
3231         }
3232         panic("Unsupported function name");
3233 }
3234
3235 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3236 {
3237         statement_t *statement = expr->statement;
3238
3239         assert(statement->kind == STATEMENT_COMPOUND);
3240         return compound_statement_to_firm(&statement->compound);
3241 }
3242
3243 static ir_node *va_start_expression_to_firm(
3244         const va_start_expression_t *const expr)
3245 {
3246         ir_entity *param_ent = current_vararg_entity;
3247         if (param_ent == NULL) {
3248                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3249                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3250                 ir_type *const param_type  = get_unknown_type();
3251                 param_ent = new_parameter_entity(frame_type, n, param_type);
3252                 current_vararg_entity = param_ent;
3253         }
3254
3255         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3256         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3257         ir_node  *const no_mem  = new_NoMem();
3258         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3259
3260         set_value_for_expression(expr->ap, arg_sel);
3261
3262         return NULL;
3263 }
3264
3265 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3266 {
3267         type_t       *const type    = expr->base.type;
3268         expression_t *const ap_expr = expr->ap;
3269         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3270         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3271         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3272         ir_node      *const res     = deref_address(dbgi, type, ap);
3273
3274         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3275         ir_mode      *const mode    = get_irn_mode(cnst);
3276         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3277         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3278         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3279         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3280         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3281
3282         set_value_for_expression_addr(ap_expr, add, ap_addr);
3283
3284         return res;
3285 }
3286
3287 /**
3288  * Generate Firm for a va_copy expression.
3289  */
3290 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3291 {
3292         ir_node *const src = expression_to_firm(expr->src);
3293         set_value_for_expression(expr->dst, src);
3294         return NULL;
3295 }
3296
3297 static ir_node *dereference_addr(const unary_expression_t *const expression)
3298 {
3299         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3300         return expression_to_firm(expression->value);
3301 }
3302
3303 /**
3304  * Returns a IR-node representing an lvalue of the given expression.
3305  */
3306 static ir_node *expression_to_addr(const expression_t *expression)
3307 {
3308         switch(expression->kind) {
3309         case EXPR_ARRAY_ACCESS:
3310                 return array_access_addr(&expression->array_access);
3311         case EXPR_CALL:
3312                 return call_expression_to_firm(&expression->call);
3313         case EXPR_COMPOUND_LITERAL:
3314                 return compound_literal_to_firm(&expression->compound_literal);
3315         case EXPR_REFERENCE:
3316                 return reference_addr(&expression->reference);
3317         case EXPR_SELECT:
3318                 return select_addr(&expression->select);
3319         case EXPR_UNARY_DEREFERENCE:
3320                 return dereference_addr(&expression->unary);
3321         default:
3322                 break;
3323         }
3324         panic("trying to get address of non-lvalue");
3325 }
3326
3327 static ir_node *builtin_constant_to_firm(
3328                 const builtin_constant_expression_t *expression)
3329 {
3330         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3331         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3332         return create_Const_from_bool(mode, v);
3333 }
3334
3335 static ir_node *builtin_types_compatible_to_firm(
3336                 const builtin_types_compatible_expression_t *expression)
3337 {
3338         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3339         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3340         bool     const value = types_compatible(left, right);
3341         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3342         return create_Const_from_bool(mode, value);
3343 }
3344
3345 static ir_node *get_label_block(label_t *label)
3346 {
3347         if (label->block != NULL)
3348                 return label->block;
3349
3350         /* beware: might be called from create initializer with current_ir_graph
3351          * set to const_code_irg. */
3352         ir_graph *rem    = current_ir_graph;
3353         current_ir_graph = current_function;
3354
3355         ir_node *block = new_immBlock();
3356
3357         label->block = block;
3358
3359         ARR_APP1(label_t *, all_labels, label);
3360
3361         current_ir_graph = rem;
3362         return block;
3363 }
3364
3365 /**
3366  * Pointer to a label.  This is used for the
3367  * GNU address-of-label extension.
3368  */
3369 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3370 {
3371         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3372         ir_node   *block  = get_label_block(label->label);
3373         ir_entity *entity = create_Block_entity(block);
3374
3375         symconst_symbol value;
3376         value.entity_p = entity;
3377         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3378 }
3379
3380 static ir_node *error_to_firm(const expression_t *expression)
3381 {
3382         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3383         return new_Bad(mode);
3384 }
3385
3386 /**
3387  * creates firm nodes for an expression. The difference between this function
3388  * and expression_to_firm is, that this version might produce mode_b nodes
3389  * instead of mode_Is.
3390  */
3391 static ir_node *_expression_to_firm(const expression_t *expression)
3392 {
3393 #ifndef NDEBUG
3394         if (!constant_folding) {
3395                 assert(!expression->base.transformed);
3396                 ((expression_t*) expression)->base.transformed = true;
3397         }
3398 #endif
3399
3400         switch (expression->kind) {
3401         EXPR_LITERAL_CASES
3402                 return literal_to_firm(&expression->literal);
3403         case EXPR_STRING_LITERAL:
3404                 return string_to_firm(&expression->base.source_position, "str.%u",
3405                                       &expression->literal.value);
3406         case EXPR_WIDE_STRING_LITERAL:
3407                 return wide_string_literal_to_firm(&expression->string_literal);
3408         case EXPR_REFERENCE:
3409                 return reference_expression_to_firm(&expression->reference);
3410         case EXPR_REFERENCE_ENUM_VALUE:
3411                 return reference_expression_enum_value_to_firm(&expression->reference);
3412         case EXPR_CALL:
3413                 return call_expression_to_firm(&expression->call);
3414         EXPR_UNARY_CASES
3415                 return unary_expression_to_firm(&expression->unary);
3416         EXPR_BINARY_CASES
3417                 return binary_expression_to_firm(&expression->binary);
3418         case EXPR_ARRAY_ACCESS:
3419                 return array_access_to_firm(&expression->array_access);
3420         case EXPR_SIZEOF:
3421                 return sizeof_to_firm(&expression->typeprop);
3422         case EXPR_ALIGNOF:
3423                 return alignof_to_firm(&expression->typeprop);
3424         case EXPR_CONDITIONAL:
3425                 return conditional_to_firm(&expression->conditional);
3426         case EXPR_SELECT:
3427                 return select_to_firm(&expression->select);
3428         case EXPR_CLASSIFY_TYPE:
3429                 return classify_type_to_firm(&expression->classify_type);
3430         case EXPR_FUNCNAME:
3431                 return function_name_to_firm(&expression->funcname);
3432         case EXPR_STATEMENT:
3433                 return statement_expression_to_firm(&expression->statement);
3434         case EXPR_VA_START:
3435                 return va_start_expression_to_firm(&expression->va_starte);
3436         case EXPR_VA_ARG:
3437                 return va_arg_expression_to_firm(&expression->va_arge);
3438         case EXPR_VA_COPY:
3439                 return va_copy_expression_to_firm(&expression->va_copye);
3440         case EXPR_BUILTIN_CONSTANT_P:
3441                 return builtin_constant_to_firm(&expression->builtin_constant);
3442         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3443                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3444         case EXPR_OFFSETOF:
3445                 return offsetof_to_firm(&expression->offsetofe);
3446         case EXPR_COMPOUND_LITERAL:
3447                 return compound_literal_to_firm(&expression->compound_literal);
3448         case EXPR_LABEL_ADDRESS:
3449                 return label_address_to_firm(&expression->label_address);
3450
3451         case EXPR_ERROR:
3452                 return error_to_firm(expression);
3453         }
3454         panic("invalid expression found");
3455 }
3456
3457 /**
3458  * Check if a given expression is a GNU __builtin_expect() call.
3459  */
3460 static bool is_builtin_expect(const expression_t *expression)
3461 {
3462         if (expression->kind != EXPR_CALL)
3463                 return false;
3464
3465         expression_t *function = expression->call.function;
3466         if (function->kind != EXPR_REFERENCE)
3467                 return false;
3468         reference_expression_t *ref = &function->reference;
3469         if (ref->entity->kind         != ENTITY_FUNCTION ||
3470             ref->entity->function.btk != BUILTIN_EXPECT)
3471                 return false;
3472
3473         return true;
3474 }
3475
3476 static bool produces_mode_b(const expression_t *expression)
3477 {
3478         switch (expression->kind) {
3479         case EXPR_BINARY_EQUAL:
3480         case EXPR_BINARY_NOTEQUAL:
3481         case EXPR_BINARY_LESS:
3482         case EXPR_BINARY_LESSEQUAL:
3483         case EXPR_BINARY_GREATER:
3484         case EXPR_BINARY_GREATEREQUAL:
3485         case EXPR_BINARY_ISGREATER:
3486         case EXPR_BINARY_ISGREATEREQUAL:
3487         case EXPR_BINARY_ISLESS:
3488         case EXPR_BINARY_ISLESSEQUAL:
3489         case EXPR_BINARY_ISLESSGREATER:
3490         case EXPR_BINARY_ISUNORDERED:
3491         case EXPR_UNARY_NOT:
3492                 return true;
3493
3494         case EXPR_CALL:
3495                 if (is_builtin_expect(expression)) {
3496                         expression_t *argument = expression->call.arguments->expression;
3497                         return produces_mode_b(argument);
3498                 }
3499                 return false;
3500         case EXPR_BINARY_COMMA:
3501                 return produces_mode_b(expression->binary.right);
3502
3503         default:
3504                 return false;
3505         }
3506 }
3507
3508 static ir_node *expression_to_firm(const expression_t *expression)
3509 {
3510         if (!produces_mode_b(expression)) {
3511                 ir_node *res = _expression_to_firm(expression);
3512                 assert(res == NULL || get_irn_mode(res) != mode_b);
3513                 return res;
3514         }
3515
3516         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3517                 bool const constant_folding_old = constant_folding;
3518                 constant_folding = true;
3519                 ir_node *res  = _expression_to_firm(expression);
3520                 constant_folding = constant_folding_old;
3521                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3522                 assert(is_Const(res));
3523                 return create_Const_from_bool(mode, !is_Const_null(res));
3524         }
3525
3526         /* we have to produce a 0/1 from the mode_b expression */
3527         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3528         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3529         return produce_condition_result(expression, mode, dbgi);
3530 }
3531
3532 /**
3533  * create a short-circuit expression evaluation that tries to construct
3534  * efficient control flow structures for &&, || and ! expressions
3535  */
3536 static ir_node *create_condition_evaluation(const expression_t *expression,
3537                                             ir_node *true_block,
3538                                             ir_node *false_block)
3539 {
3540         switch(expression->kind) {
3541         case EXPR_UNARY_NOT: {
3542                 const unary_expression_t *unary_expression = &expression->unary;
3543                 create_condition_evaluation(unary_expression->value, false_block,
3544                                             true_block);
3545                 return NULL;
3546         }
3547         case EXPR_BINARY_LOGICAL_AND: {
3548                 const binary_expression_t *binary_expression = &expression->binary;
3549
3550                 ir_node *extra_block = new_immBlock();
3551                 create_condition_evaluation(binary_expression->left, extra_block,
3552                                             false_block);
3553                 mature_immBlock(extra_block);
3554                 set_cur_block(extra_block);
3555                 create_condition_evaluation(binary_expression->right, true_block,
3556                                             false_block);
3557                 return NULL;
3558         }
3559         case EXPR_BINARY_LOGICAL_OR: {
3560                 const binary_expression_t *binary_expression = &expression->binary;
3561
3562                 ir_node *extra_block = new_immBlock();
3563                 create_condition_evaluation(binary_expression->left, true_block,
3564                                             extra_block);
3565                 mature_immBlock(extra_block);
3566                 set_cur_block(extra_block);
3567                 create_condition_evaluation(binary_expression->right, true_block,
3568                                             false_block);
3569                 return NULL;
3570         }
3571         default:
3572                 break;
3573         }
3574
3575         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3576         ir_node  *cond_expr  = _expression_to_firm(expression);
3577         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3578         ir_node  *cond       = new_d_Cond(dbgi, condition);
3579         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3580         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3581
3582         /* set branch prediction info based on __builtin_expect */
3583         if (is_builtin_expect(expression) && is_Cond(cond)) {
3584                 call_argument_t *argument = expression->call.arguments->next;
3585                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3586                         bool               const cnst = fold_constant_to_bool(argument->expression);
3587                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3588                         set_Cond_jmp_pred(cond, pred);
3589                 }
3590         }
3591
3592         add_immBlock_pred(true_block, true_proj);
3593         add_immBlock_pred(false_block, false_proj);
3594
3595         set_unreachable_now();
3596         return cond_expr;
3597 }
3598
3599 static void create_variable_entity(entity_t *variable,
3600                                    declaration_kind_t declaration_kind,
3601                                    ir_type *parent_type)
3602 {
3603         assert(variable->kind == ENTITY_VARIABLE);
3604         type_t    *type = skip_typeref(variable->declaration.type);
3605
3606         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3607         ir_type   *const irtype    = get_ir_type(type);
3608         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3609         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3610         unsigned         alignment = variable->declaration.alignment;
3611
3612         set_entity_alignment(irentity, alignment);
3613
3614         handle_decl_modifiers(irentity, variable);
3615
3616         variable->declaration.kind  = (unsigned char) declaration_kind;
3617         variable->variable.v.entity = irentity;
3618         set_entity_ld_ident(irentity, create_ld_ident(variable));
3619
3620         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3621                 set_entity_volatility(irentity, volatility_is_volatile);
3622         }
3623 }
3624
3625
3626 typedef struct type_path_entry_t type_path_entry_t;
3627 struct type_path_entry_t {
3628         type_t           *type;
3629         ir_initializer_t *initializer;
3630         size_t            index;
3631         entity_t         *compound_entry;
3632 };
3633
3634 typedef struct type_path_t type_path_t;
3635 struct type_path_t {
3636         type_path_entry_t *path;
3637         type_t            *top_type;
3638         bool               invalid;
3639 };
3640
3641 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3642 {
3643         size_t len = ARR_LEN(path->path);
3644
3645         for (size_t i = 0; i < len; ++i) {
3646                 const type_path_entry_t *entry = & path->path[i];
3647
3648                 type_t *type = skip_typeref(entry->type);
3649                 if (is_type_compound(type)) {
3650                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3651                 } else if (is_type_array(type)) {
3652                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3653                 } else {
3654                         fprintf(stderr, "-INVALID-");
3655                 }
3656         }
3657         fprintf(stderr, "  (");
3658         print_type(path->top_type);
3659         fprintf(stderr, ")");
3660 }
3661
3662 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3663 {
3664         size_t len = ARR_LEN(path->path);
3665         assert(len > 0);
3666         return & path->path[len-1];
3667 }
3668
3669 static type_path_entry_t *append_to_type_path(type_path_t *path)
3670 {
3671         size_t len = ARR_LEN(path->path);
3672         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3673
3674         type_path_entry_t *result = & path->path[len];
3675         memset(result, 0, sizeof(result[0]));
3676         return result;
3677 }
3678
3679 static size_t get_compound_member_count(const compound_type_t *type)
3680 {
3681         compound_t *compound  = type->compound;
3682         size_t      n_members = 0;
3683         entity_t   *member    = compound->members.entities;
3684         for ( ; member != NULL; member = member->base.next) {
3685                 ++n_members;
3686         }
3687
3688         return n_members;
3689 }
3690
3691 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3692 {
3693         type_t *orig_top_type = path->top_type;
3694         type_t *top_type      = skip_typeref(orig_top_type);
3695
3696         assert(is_type_compound(top_type) || is_type_array(top_type));
3697
3698         if (ARR_LEN(path->path) == 0) {
3699                 return NULL;
3700         } else {
3701                 type_path_entry_t *top         = get_type_path_top(path);
3702                 ir_initializer_t  *initializer = top->initializer;
3703                 return get_initializer_compound_value(initializer, top->index);
3704         }
3705 }
3706
3707 static void descend_into_subtype(type_path_t *path)
3708 {
3709         type_t *orig_top_type = path->top_type;
3710         type_t *top_type      = skip_typeref(orig_top_type);
3711
3712         assert(is_type_compound(top_type) || is_type_array(top_type));
3713
3714         ir_initializer_t *initializer = get_initializer_entry(path);
3715
3716         type_path_entry_t *top = append_to_type_path(path);
3717         top->type              = top_type;
3718
3719         size_t len;
3720
3721         if (is_type_compound(top_type)) {
3722                 compound_t *const compound = top_type->compound.compound;
3723                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3724
3725                 top->compound_entry = entry;
3726                 top->index          = 0;
3727                 len                 = get_compound_member_count(&top_type->compound);
3728                 if (entry != NULL) {
3729                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3730                         path->top_type = entry->declaration.type;
3731                 }
3732         } else {
3733                 assert(is_type_array(top_type));
3734                 assert(top_type->array.size > 0);
3735
3736                 top->index     = 0;
3737                 path->top_type = top_type->array.element_type;
3738                 len            = top_type->array.size;
3739         }
3740         if (initializer == NULL
3741                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3742                 initializer = create_initializer_compound(len);
3743                 /* we have to set the entry at the 2nd latest path entry... */
3744                 size_t path_len = ARR_LEN(path->path);
3745                 assert(path_len >= 1);
3746                 if (path_len > 1) {
3747                         type_path_entry_t *entry        = & path->path[path_len-2];
3748                         ir_initializer_t  *tinitializer = entry->initializer;
3749                         set_initializer_compound_value(tinitializer, entry->index,
3750                                                        initializer);
3751                 }
3752         }
3753         top->initializer = initializer;
3754 }
3755
3756 static void ascend_from_subtype(type_path_t *path)
3757 {
3758         type_path_entry_t *top = get_type_path_top(path);
3759
3760         path->top_type = top->type;
3761
3762         size_t len = ARR_LEN(path->path);
3763         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3764 }
3765
3766 static void walk_designator(type_path_t *path, const designator_t *designator)
3767 {
3768         /* designators start at current object type */
3769         ARR_RESIZE(type_path_entry_t, path->path, 1);
3770
3771         for ( ; designator != NULL; designator = designator->next) {
3772                 type_path_entry_t *top         = get_type_path_top(path);
3773                 type_t            *orig_type   = top->type;
3774                 type_t            *type        = skip_typeref(orig_type);
3775
3776                 if (designator->symbol != NULL) {
3777                         assert(is_type_compound(type));
3778                         size_t    index  = 0;
3779                         symbol_t *symbol = designator->symbol;
3780
3781                         compound_t *compound = type->compound.compound;
3782                         entity_t   *iter     = compound->members.entities;
3783                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3784                                 if (iter->base.symbol == symbol) {
3785                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3786                                         break;
3787                                 }
3788                         }
3789                         assert(iter != NULL);
3790
3791                         /* revert previous initialisations of other union elements */
3792                         if (type->kind == TYPE_COMPOUND_UNION) {
3793                                 ir_initializer_t *initializer = top->initializer;
3794                                 if (initializer != NULL
3795                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3796                                         /* are we writing to a new element? */
3797                                         ir_initializer_t *oldi
3798                                                 = get_initializer_compound_value(initializer, index);
3799                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3800                                                 /* clear initializer */
3801                                                 size_t len
3802                                                         = get_initializer_compound_n_entries(initializer);
3803                                                 ir_initializer_t *nulli = get_initializer_null();
3804                                                 for (size_t i = 0; i < len; ++i) {
3805                                                         set_initializer_compound_value(initializer, i,
3806                                                                                        nulli);
3807                                                 }
3808                                         }
3809                                 }
3810                         }
3811
3812                         top->type           = orig_type;
3813                         top->compound_entry = iter;
3814                         top->index          = index;
3815                         orig_type           = iter->declaration.type;
3816                 } else {
3817                         expression_t *array_index = designator->array_index;
3818                         assert(designator->array_index != NULL);
3819                         assert(is_type_array(type));
3820
3821                         long index = fold_constant_to_int(array_index);
3822                         assert(index >= 0);
3823 #ifndef NDEBUG
3824                         if (type->array.size_constant) {
3825                                 long array_size = type->array.size;
3826                                 assert(index < array_size);
3827                         }
3828 #endif
3829
3830                         top->type  = orig_type;
3831                         top->index = (size_t) index;
3832                         orig_type  = type->array.element_type;
3833                 }
3834                 path->top_type = orig_type;
3835
3836                 if (designator->next != NULL) {
3837                         descend_into_subtype(path);
3838                 }
3839         }
3840
3841         path->invalid  = false;
3842 }
3843
3844 static void advance_current_object(type_path_t *path)
3845 {
3846         if (path->invalid) {
3847                 /* TODO: handle this... */
3848                 panic("invalid initializer in ast2firm (excessive elements)");
3849         }
3850
3851         type_path_entry_t *top = get_type_path_top(path);
3852
3853         type_t *type = skip_typeref(top->type);
3854         if (is_type_union(type)) {
3855                 /* only the first element is initialized in unions */
3856                 top->compound_entry = NULL;
3857         } else if (is_type_struct(type)) {
3858                 entity_t *entry = top->compound_entry;
3859
3860                 top->index++;
3861                 entry               = skip_unnamed_bitfields(entry->base.next);
3862                 top->compound_entry = entry;
3863                 if (entry != NULL) {
3864                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3865                         path->top_type = entry->declaration.type;
3866                         return;
3867                 }
3868         } else {
3869                 assert(is_type_array(type));
3870
3871                 top->index++;
3872                 if (!type->array.size_constant || top->index < type->array.size) {
3873                         return;
3874                 }
3875         }
3876
3877         /* we're past the last member of the current sub-aggregate, try if we
3878          * can ascend in the type hierarchy and continue with another subobject */
3879         size_t len = ARR_LEN(path->path);
3880
3881         if (len > 1) {
3882                 ascend_from_subtype(path);
3883                 advance_current_object(path);
3884         } else {
3885                 path->invalid = true;
3886         }
3887 }
3888
3889
3890 static ir_initializer_t *create_ir_initializer(
3891                 const initializer_t *initializer, type_t *type);
3892
3893 static ir_initializer_t *create_ir_initializer_value(
3894                 const initializer_value_t *initializer)
3895 {
3896         if (is_type_compound(initializer->value->base.type)) {
3897                 panic("initializer creation for compounds not implemented yet");
3898         }
3899         type_t       *type = initializer->value->base.type;
3900         expression_t *expr = initializer->value;
3901         ir_node *value = expression_to_firm(expr);
3902         ir_mode *mode  = get_ir_mode_storage(type);
3903         value          = create_conv(NULL, value, mode);
3904         return create_initializer_const(value);
3905 }
3906
3907 /** test wether type can be initialized by a string constant */
3908 static bool is_string_type(type_t *type)
3909 {
3910         type_t *inner;
3911         if (is_type_pointer(type)) {
3912                 inner = skip_typeref(type->pointer.points_to);
3913         } else if(is_type_array(type)) {
3914                 inner = skip_typeref(type->array.element_type);
3915         } else {
3916                 return false;
3917         }
3918
3919         return is_type_integer(inner);
3920 }
3921
3922 static ir_initializer_t *create_ir_initializer_list(
3923                 const initializer_list_t *initializer, type_t *type)
3924 {
3925         type_path_t path;
3926         memset(&path, 0, sizeof(path));
3927         path.top_type = type;
3928         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3929
3930         descend_into_subtype(&path);
3931
3932         for (size_t i = 0; i < initializer->len; ++i) {
3933                 const initializer_t *sub_initializer = initializer->initializers[i];
3934
3935                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3936                         walk_designator(&path, sub_initializer->designator.designator);
3937                         continue;
3938                 }
3939
3940                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3941                         /* we might have to descend into types until we're at a scalar
3942                          * type */
3943                         while(true) {
3944                                 type_t *orig_top_type = path.top_type;
3945                                 type_t *top_type      = skip_typeref(orig_top_type);
3946
3947                                 if (is_type_scalar(top_type))
3948                                         break;
3949                                 descend_into_subtype(&path);
3950                         }
3951                 } else if (sub_initializer->kind == INITIALIZER_STRING
3952                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3953                         /* we might have to descend into types until we're at a scalar
3954                          * type */
3955                         while (true) {
3956                                 type_t *orig_top_type = path.top_type;
3957                                 type_t *top_type      = skip_typeref(orig_top_type);
3958
3959                                 if (is_string_type(top_type))
3960                                         break;
3961                                 descend_into_subtype(&path);
3962                         }
3963                 }
3964
3965                 ir_initializer_t *sub_irinitializer
3966                         = create_ir_initializer(sub_initializer, path.top_type);
3967
3968                 size_t path_len = ARR_LEN(path.path);
3969                 assert(path_len >= 1);
3970                 type_path_entry_t *entry        = & path.path[path_len-1];
3971                 ir_initializer_t  *tinitializer = entry->initializer;
3972                 set_initializer_compound_value(tinitializer, entry->index,
3973                                                sub_irinitializer);
3974
3975                 advance_current_object(&path);
3976         }
3977
3978         assert(ARR_LEN(path.path) >= 1);
3979         ir_initializer_t *result = path.path[0].initializer;
3980         DEL_ARR_F(path.path);
3981
3982         return result;
3983 }
3984
3985 static ir_initializer_t *create_ir_initializer_string(
3986                 const initializer_string_t *initializer, type_t *type)
3987 {
3988         type = skip_typeref(type);
3989
3990         size_t            string_len    = initializer->string.size;
3991         assert(type->kind == TYPE_ARRAY);
3992         assert(type->array.size_constant);
3993         size_t            len           = type->array.size;
3994         ir_initializer_t *irinitializer = create_initializer_compound(len);
3995
3996         const char *string = initializer->string.begin;
3997         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3998
3999         for (size_t i = 0; i < len; ++i) {
4000                 char c = 0;
4001                 if (i < string_len)
4002                         c = string[i];
4003
4004                 ir_tarval        *tv = new_tarval_from_long(c, mode);
4005                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4006
4007                 set_initializer_compound_value(irinitializer, i, char_initializer);
4008         }
4009
4010         return irinitializer;
4011 }
4012
4013 static ir_initializer_t *create_ir_initializer_wide_string(
4014                 const initializer_wide_string_t *initializer, type_t *type)
4015 {
4016         assert(type->kind == TYPE_ARRAY);
4017         assert(type->array.size_constant);
4018         size_t            len           = type->array.size;
4019         size_t            string_len    = wstrlen(&initializer->string);
4020         ir_initializer_t *irinitializer = create_initializer_compound(len);
4021
4022         const char *p    = initializer->string.begin;
4023         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4024
4025         for (size_t i = 0; i < len; ++i) {
4026                 utf32 c = 0;
4027                 if (i < string_len) {
4028                         c = read_utf8_char(&p);
4029                 }
4030                 ir_tarval *tv = new_tarval_from_long(c, mode);
4031                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4032
4033                 set_initializer_compound_value(irinitializer, i, char_initializer);
4034         }
4035
4036         return irinitializer;
4037 }
4038
4039 static ir_initializer_t *create_ir_initializer(
4040                 const initializer_t *initializer, type_t *type)
4041 {
4042         switch(initializer->kind) {
4043                 case INITIALIZER_STRING:
4044                         return create_ir_initializer_string(&initializer->string, type);
4045
4046                 case INITIALIZER_WIDE_STRING:
4047                         return create_ir_initializer_wide_string(&initializer->wide_string,
4048                                                                  type);
4049
4050                 case INITIALIZER_LIST:
4051                         return create_ir_initializer_list(&initializer->list, type);
4052
4053                 case INITIALIZER_VALUE:
4054                         return create_ir_initializer_value(&initializer->value);
4055
4056                 case INITIALIZER_DESIGNATOR:
4057                         panic("unexpected designator initializer found");
4058         }
4059         panic("unknown initializer");
4060 }
4061
4062 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4063  *  are elements [...] the remainder of the aggregate shall be initialized
4064  *  implicitly the same as objects that have static storage duration. */
4065 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4066                 ir_node *base_addr)
4067 {
4068         /* for unions we must NOT do anything for null initializers */
4069         ir_type *owner = get_entity_owner(entity);
4070         if (is_Union_type(owner)) {
4071                 return;
4072         }
4073
4074         ir_type *ent_type = get_entity_type(entity);
4075         /* create sub-initializers for a compound type */
4076         if (is_compound_type(ent_type)) {
4077                 unsigned n_members = get_compound_n_members(ent_type);
4078                 for (unsigned n = 0; n < n_members; ++n) {
4079                         ir_entity *member = get_compound_member(ent_type, n);
4080                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4081                                                                 member);
4082                         create_dynamic_null_initializer(member, dbgi, addr);
4083                 }
4084                 return;
4085         }
4086         if (is_Array_type(ent_type)) {
4087                 assert(has_array_upper_bound(ent_type, 0));
4088                 long n = get_array_upper_bound_int(ent_type, 0);
4089                 for (long i = 0; i < n; ++i) {
4090                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4091                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4092                         ir_node   *in[1]    = { cnst };
4093                         ir_entity *arrent   = get_array_element_entity(ent_type);
4094                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4095                                                         arrent);
4096                         create_dynamic_null_initializer(arrent, dbgi, addr);
4097                 }
4098                 return;
4099         }
4100
4101         ir_mode *value_mode = get_type_mode(ent_type);
4102         ir_node *node       = new_Const(get_mode_null(value_mode));
4103
4104         /* is it a bitfield type? */
4105         if (is_Primitive_type(ent_type) &&
4106                         get_primitive_base_type(ent_type) != NULL) {
4107                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4108                 return;
4109         }
4110
4111         ir_node *mem    = get_store();
4112         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4113         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4114         set_store(proj_m);
4115 }
4116
4117 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4118                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4119 {
4120         switch(get_initializer_kind(initializer)) {
4121         case IR_INITIALIZER_NULL:
4122                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4123                 return;
4124         case IR_INITIALIZER_CONST: {
4125                 ir_node *node     = get_initializer_const_value(initializer);
4126                 ir_type *ent_type = get_entity_type(entity);
4127
4128                 /* is it a bitfield type? */
4129                 if (is_Primitive_type(ent_type) &&
4130                                 get_primitive_base_type(ent_type) != NULL) {
4131                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4132                         return;
4133                 }
4134
4135                 assert(get_type_mode(type) == get_irn_mode(node));
4136                 ir_node *mem    = get_store();
4137                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4138                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4139                 set_store(proj_m);
4140                 return;
4141         }
4142         case IR_INITIALIZER_TARVAL: {
4143                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4144                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4145                 ir_type   *ent_type = get_entity_type(entity);
4146
4147                 /* is it a bitfield type? */
4148                 if (is_Primitive_type(ent_type) &&
4149                                 get_primitive_base_type(ent_type) != NULL) {
4150                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4151                         return;
4152                 }
4153
4154                 assert(get_type_mode(type) == get_tarval_mode(tv));
4155                 ir_node *mem    = get_store();
4156                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4157                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4158                 set_store(proj_m);
4159                 return;
4160         }
4161         case IR_INITIALIZER_COMPOUND: {
4162                 assert(is_compound_type(type) || is_Array_type(type));
4163                 int n_members;
4164                 if (is_Array_type(type)) {
4165                         assert(has_array_upper_bound(type, 0));
4166                         n_members = get_array_upper_bound_int(type, 0);
4167                 } else {
4168                         n_members = get_compound_n_members(type);
4169                 }
4170
4171                 if (get_initializer_compound_n_entries(initializer)
4172                                 != (unsigned) n_members)
4173                         panic("initializer doesn't match compound type");
4174
4175                 for (int i = 0; i < n_members; ++i) {
4176                         ir_node   *addr;
4177                         ir_type   *irtype;
4178                         ir_entity *sub_entity;
4179                         if (is_Array_type(type)) {
4180                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4181                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4182                                 ir_node   *in[1]    = { cnst };
4183                                 irtype     = get_array_element_type(type);
4184                                 sub_entity = get_array_element_entity(type);
4185                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4186                                                        sub_entity);
4187                         } else {
4188                                 sub_entity = get_compound_member(type, i);
4189                                 irtype     = get_entity_type(sub_entity);
4190                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4191                                                              sub_entity);
4192                         }
4193
4194                         ir_initializer_t *sub_init
4195                                 = get_initializer_compound_value(initializer, i);
4196
4197                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4198                                                        addr);
4199                 }
4200                 return;
4201         }
4202         }
4203
4204         panic("invalid IR_INITIALIZER found");
4205 }
4206
4207 static void create_dynamic_initializer(ir_initializer_t *initializer,
4208                 dbg_info *dbgi, ir_entity *entity)
4209 {
4210         ir_node *frame     = get_irg_frame(current_ir_graph);
4211         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4212         ir_type *type      = get_entity_type(entity);
4213
4214         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4215 }
4216
4217 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4218                                      ir_entity *entity, type_t *type)
4219 {
4220         ir_node *memory = get_store();
4221         ir_node *nomem  = new_NoMem();
4222         ir_node *frame  = get_irg_frame(current_ir_graph);
4223         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4224
4225         if (initializer->kind == INITIALIZER_VALUE) {
4226                 initializer_value_t *initializer_value = &initializer->value;
4227
4228                 ir_node *value = expression_to_firm(initializer_value->value);
4229                 type = skip_typeref(type);
4230                 assign_value(dbgi, addr, type, value);
4231                 return;
4232         }
4233
4234         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4235                 ir_initializer_t *irinitializer
4236                         = create_ir_initializer(initializer, type);
4237
4238                 create_dynamic_initializer(irinitializer, dbgi, entity);
4239                 return;
4240         }
4241
4242         /* create the ir_initializer */
4243         ir_graph *const old_current_ir_graph = current_ir_graph;
4244         current_ir_graph = get_const_code_irg();
4245
4246         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4247
4248         assert(current_ir_graph == get_const_code_irg());
4249         current_ir_graph = old_current_ir_graph;
4250
4251         /* create a "template" entity which is copied to the entity on the stack */
4252         ident     *const id          = id_unique("initializer.%u");
4253         ir_type   *const irtype      = get_ir_type(type);
4254         ir_type   *const global_type = get_glob_type();
4255         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4256         set_entity_ld_ident(init_entity, id);
4257
4258         set_entity_visibility(init_entity, ir_visibility_private);
4259         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4260
4261         set_entity_initializer(init_entity, irinitializer);
4262
4263         ir_node *const src_addr = create_symconst(dbgi, init_entity);
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
4302                 ir_node *value = expression_to_firm(initializer_value->value);
4303
4304                 type_t  *init_type = initializer_value->value->base.type;
4305                 ir_mode *mode      = get_ir_mode_storage(init_type);
4306                 value = create_conv(dbgi, value, mode);
4307                 value = do_strict_conv(dbgi, value);
4308
4309                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4310                         set_value(entity->variable.v.value_number, value);
4311                 } else {
4312                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4313
4314                         ir_entity *irentity = entity->variable.v.entity;
4315
4316                         if (tq & TYPE_QUALIFIER_CONST
4317                                         && get_entity_owner(irentity) != get_tls_type()) {
4318                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4319                         }
4320                         set_atomic_ent_value(irentity, value);
4321                 }
4322         } else {
4323                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4324                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4325
4326                 ir_entity        *irentity        = entity->variable.v.entity;
4327                 ir_initializer_t *irinitializer
4328                         = create_ir_initializer(initializer, type);
4329
4330                 if (tq & TYPE_QUALIFIER_CONST) {
4331                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4332                 }
4333                 set_entity_initializer(irentity, irinitializer);
4334         }
4335 }
4336
4337 static void create_variable_length_array(entity_t *entity)
4338 {
4339         assert(entity->kind == ENTITY_VARIABLE);
4340         assert(entity->variable.initializer == NULL);
4341
4342         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4343         entity->variable.v.vla_base = NULL;
4344
4345         /* TODO: record VLA somewhere so we create the free node when we leave
4346          * it's scope */
4347 }
4348
4349 static void allocate_variable_length_array(entity_t *entity)
4350 {
4351         assert(entity->kind == ENTITY_VARIABLE);
4352         assert(entity->variable.initializer == NULL);
4353         assert(currently_reachable());
4354
4355         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4356         type_t   *type      = entity->declaration.type;
4357         ir_type  *el_type   = get_ir_type(type->array.element_type);
4358
4359         /* make sure size_node is calculated */
4360         get_type_size_node(type);
4361         ir_node  *elems = type->array.size_node;
4362         ir_node  *mem   = get_store();
4363         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4364
4365         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4366         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4367         set_store(proj_m);
4368
4369         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4370         entity->variable.v.vla_base = addr;
4371 }
4372
4373 /**
4374  * Creates a Firm local variable from a declaration.
4375  */
4376 static void create_local_variable(entity_t *entity)
4377 {
4378         assert(entity->kind == ENTITY_VARIABLE);
4379         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4380
4381         bool needs_entity = entity->variable.address_taken;
4382         type_t *type = skip_typeref(entity->declaration.type);
4383
4384         /* is it a variable length array? */
4385         if (is_type_array(type) && !type->array.size_constant) {
4386                 create_variable_length_array(entity);
4387                 return;
4388         } else if (is_type_array(type) || is_type_compound(type)) {
4389                 needs_entity = true;
4390         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4391                 needs_entity = true;
4392         }
4393
4394         if (needs_entity) {
4395                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4396                 create_variable_entity(entity,
4397                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4398                                        frame_type);
4399         } else {
4400                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4401                 entity->variable.v.value_number = next_value_number_function;
4402                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4403                                         entity);
4404                 ++next_value_number_function;
4405         }
4406 }
4407
4408 static void create_local_static_variable(entity_t *entity)
4409 {
4410         assert(entity->kind == ENTITY_VARIABLE);
4411         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4412
4413         type_t   *type           = skip_typeref(entity->declaration.type);
4414         ir_type  *const var_type = entity->variable.thread_local ?
4415                 get_tls_type() : get_glob_type();
4416         ir_type  *const irtype   = get_ir_type(type);
4417         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4418
4419         size_t l = strlen(entity->base.symbol->string);
4420         char   buf[l + sizeof(".%u")];
4421         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4422         ident     *const id       = id_unique(buf);
4423         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4424
4425         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4426                 set_entity_volatility(irentity, volatility_is_volatile);
4427         }
4428
4429         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4430         entity->variable.v.entity = irentity;
4431
4432         set_entity_ld_ident(irentity, id);
4433         set_entity_visibility(irentity, ir_visibility_local);
4434
4435         ir_graph *const old_current_ir_graph = current_ir_graph;
4436         current_ir_graph = get_const_code_irg();
4437
4438         create_variable_initializer(entity);
4439
4440         assert(current_ir_graph == get_const_code_irg());
4441         current_ir_graph = old_current_ir_graph;
4442 }
4443
4444
4445
4446 static void return_statement_to_firm(return_statement_t *statement)
4447 {
4448         if (!currently_reachable())
4449                 return;
4450
4451         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4452         type_t   *type        = current_function_entity->declaration.type;
4453         ir_type  *func_irtype = get_ir_type(type);
4454
4455         ir_node *in[1];
4456         int      in_len;
4457         if (get_method_n_ress(func_irtype) > 0) {
4458                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4459
4460                 if (statement->value != NULL) {
4461                         ir_node *node = expression_to_firm(statement->value);
4462                         if (!is_compound_type(res_type)) {
4463                                 type_t  *ret_value_type = statement->value->base.type;
4464                                 ir_mode *mode           = get_ir_mode_storage(ret_value_type);
4465                                 node                    = create_conv(dbgi, node, mode);
4466                                 node                    = do_strict_conv(dbgi, node);
4467                         }
4468                         in[0] = node;
4469                 } else {
4470                         ir_mode *mode;
4471                         if (is_compound_type(res_type)) {
4472                                 mode = mode_P_data;
4473                         } else {
4474                                 mode = get_type_mode(res_type);
4475                         }
4476                         in[0] = new_Unknown(mode);
4477                 }
4478                 in_len = 1;
4479         } else {
4480                 /* build return_value for its side effects */
4481                 if (statement->value != NULL) {
4482                         expression_to_firm(statement->value);
4483                 }
4484                 in_len = 0;
4485         }
4486
4487         ir_node  *store = get_store();
4488         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4489
4490         ir_node *end_block = get_irg_end_block(current_ir_graph);
4491         add_immBlock_pred(end_block, ret);
4492
4493         set_unreachable_now();
4494 }
4495
4496 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4497 {
4498         if (!currently_reachable())
4499                 return NULL;
4500
4501         return expression_to_firm(statement->expression);
4502 }
4503
4504 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4505 {
4506         entity_t *entity = compound->scope.entities;
4507         for ( ; entity != NULL; entity = entity->base.next) {
4508                 if (!is_declaration(entity))
4509                         continue;
4510
4511                 create_local_declaration(entity);
4512         }
4513
4514         ir_node     *result    = NULL;
4515         statement_t *statement = compound->statements;
4516         for ( ; statement != NULL; statement = statement->base.next) {
4517                 if (statement->base.next == NULL
4518                                 && statement->kind == STATEMENT_EXPRESSION) {
4519                         result = expression_statement_to_firm(
4520                                         &statement->expression);
4521                         break;
4522                 }
4523                 statement_to_firm(statement);
4524         }
4525
4526         return result;
4527 }
4528
4529 static void create_global_variable(entity_t *entity)
4530 {
4531         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4532         ir_visibility visibility = ir_visibility_default;
4533         ir_entity    *irentity;
4534         assert(entity->kind == ENTITY_VARIABLE);
4535
4536         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4537         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4538         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4539         case STORAGE_CLASS_NONE:
4540                 visibility = ir_visibility_default;
4541                 /* uninitialized globals get merged in C */
4542                 if (entity->variable.initializer == NULL)
4543                         linkage |= IR_LINKAGE_MERGE;
4544                 break;
4545         case STORAGE_CLASS_TYPEDEF:
4546         case STORAGE_CLASS_AUTO:
4547         case STORAGE_CLASS_REGISTER:
4548                 panic("invalid storage class for global var");
4549         }
4550
4551         ir_type *var_type = get_glob_type();
4552         if (entity->variable.thread_local) {
4553                 var_type = get_tls_type();
4554                 /* LINKAGE_MERGE not supported by current linkers */
4555                 linkage &= ~IR_LINKAGE_MERGE;
4556         }
4557         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4558         irentity = entity->variable.v.entity;
4559         add_entity_linkage(irentity, linkage);
4560         set_entity_visibility(irentity, visibility);
4561 }
4562
4563 static void create_local_declaration(entity_t *entity)
4564 {
4565         assert(is_declaration(entity));
4566
4567         /* construct type */
4568         (void) get_ir_type(entity->declaration.type);
4569         if (entity->base.symbol == NULL) {
4570                 return;
4571         }
4572
4573         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4574         case STORAGE_CLASS_STATIC:
4575                 if (entity->kind == ENTITY_FUNCTION) {
4576                         (void)get_function_entity(entity, NULL);
4577                 } else {
4578                         create_local_static_variable(entity);
4579                 }
4580                 return;
4581         case STORAGE_CLASS_EXTERN:
4582                 if (entity->kind == ENTITY_FUNCTION) {
4583                         assert(entity->function.statement == NULL);
4584                         (void)get_function_entity(entity, NULL);
4585                 } else {
4586                         create_global_variable(entity);
4587                         create_variable_initializer(entity);
4588                 }
4589                 return;
4590         case STORAGE_CLASS_NONE:
4591         case STORAGE_CLASS_AUTO:
4592         case STORAGE_CLASS_REGISTER:
4593                 if (entity->kind == ENTITY_FUNCTION) {
4594                         if (entity->function.statement != NULL) {
4595                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4596                                 (void)get_function_entity(entity, owner);
4597                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4598                                 enqueue_inner_function(entity);
4599                         } else {
4600                                 (void)get_function_entity(entity, NULL);
4601                         }
4602                 } else {
4603                         create_local_variable(entity);
4604                 }
4605                 return;
4606         case STORAGE_CLASS_TYPEDEF:
4607                 break;
4608         }
4609         panic("invalid storage class found");
4610 }
4611
4612 static void initialize_local_declaration(entity_t *entity)
4613 {
4614         if (entity->base.symbol == NULL)
4615                 return;
4616
4617         // no need to emit code in dead blocks
4618         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4619                         && !currently_reachable())
4620                 return;
4621
4622         switch ((declaration_kind_t) entity->declaration.kind) {
4623         case DECLARATION_KIND_LOCAL_VARIABLE:
4624         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4625                 create_variable_initializer(entity);
4626                 return;
4627
4628         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4629                 allocate_variable_length_array(entity);
4630                 return;
4631
4632         case DECLARATION_KIND_COMPOUND_MEMBER:
4633         case DECLARATION_KIND_GLOBAL_VARIABLE:
4634         case DECLARATION_KIND_FUNCTION:
4635         case DECLARATION_KIND_INNER_FUNCTION:
4636                 return;
4637
4638         case DECLARATION_KIND_PARAMETER:
4639         case DECLARATION_KIND_PARAMETER_ENTITY:
4640                 panic("can't initialize parameters");
4641
4642         case DECLARATION_KIND_UNKNOWN:
4643                 panic("can't initialize unknown declaration");
4644         }
4645         panic("invalid declaration kind");
4646 }
4647
4648 static void declaration_statement_to_firm(declaration_statement_t *statement)
4649 {
4650         entity_t *entity = statement->declarations_begin;
4651         if (entity == NULL)
4652                 return;
4653
4654         entity_t *const last = statement->declarations_end;
4655         for ( ;; entity = entity->base.next) {
4656                 if (is_declaration(entity)) {
4657                         initialize_local_declaration(entity);
4658                 } else if (entity->kind == ENTITY_TYPEDEF) {
4659                         /* §6.7.7:3  Any array size expressions associated with variable length
4660                          * array declarators are evaluated each time the declaration of the
4661                          * typedef name is reached in the order of execution. */
4662                         type_t *const type = skip_typeref(entity->typedefe.type);
4663                         if (is_type_array(type) && type->array.is_vla)
4664                                 get_vla_size(&type->array);
4665                 }
4666                 if (entity == last)
4667                         break;
4668         }
4669 }
4670
4671 static void if_statement_to_firm(if_statement_t *statement)
4672 {
4673         /* Create the condition. */
4674         ir_node *true_block  = NULL;
4675         ir_node *false_block = NULL;
4676         if (currently_reachable()) {
4677                 true_block  = new_immBlock();
4678                 false_block = new_immBlock();
4679                 create_condition_evaluation(statement->condition, true_block, false_block);
4680                 mature_immBlock(true_block);
4681         }
4682
4683         /* Create the false statement.
4684          * Handle false before true, so if no false statement is present, then the
4685          * empty false block is reused as fallthrough block. */
4686         ir_node *fallthrough_block = NULL;
4687         if (statement->false_statement != NULL) {
4688                 if (false_block != NULL) {
4689                         mature_immBlock(false_block);
4690                 }
4691                 set_cur_block(false_block);
4692                 statement_to_firm(statement->false_statement);
4693                 if (currently_reachable()) {
4694                         fallthrough_block = new_immBlock();
4695                         add_immBlock_pred(fallthrough_block, new_Jmp());
4696                 }
4697         } else {
4698                 fallthrough_block = false_block;
4699         }
4700
4701         /* Create the true statement. */
4702         set_cur_block(true_block);
4703         statement_to_firm(statement->true_statement);
4704         if (currently_reachable()) {
4705                 if (fallthrough_block == NULL) {
4706                         fallthrough_block = new_immBlock();
4707                 }
4708                 add_immBlock_pred(fallthrough_block, new_Jmp());
4709         }
4710
4711         /* Handle the block after the if-statement. */
4712         if (fallthrough_block != NULL) {
4713                 mature_immBlock(fallthrough_block);
4714         }
4715         set_cur_block(fallthrough_block);
4716 }
4717
4718 /* Create a jump node which jumps into target_block, if the current block is
4719  * reachable. */
4720 static void jump_if_reachable(ir_node *const target_block)
4721 {
4722         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4723         add_immBlock_pred(target_block, pred);
4724 }
4725
4726 static void while_statement_to_firm(while_statement_t *statement)
4727 {
4728         /* Create the header block */
4729         ir_node *const header_block = new_immBlock();
4730         jump_if_reachable(header_block);
4731
4732         /* Create the condition. */
4733         ir_node      *      body_block;
4734         ir_node      *      false_block;
4735         expression_t *const cond = statement->condition;
4736         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4737                         fold_constant_to_bool(cond)) {
4738                 /* Shortcut for while (true). */
4739                 body_block  = header_block;
4740                 false_block = NULL;
4741
4742                 keep_alive(header_block);
4743                 keep_all_memory(header_block);
4744         } else {
4745                 body_block  = new_immBlock();
4746                 false_block = new_immBlock();
4747
4748                 set_cur_block(header_block);
4749                 create_condition_evaluation(cond, body_block, false_block);
4750                 mature_immBlock(body_block);
4751         }
4752
4753         ir_node *const old_continue_label = continue_label;
4754         ir_node *const old_break_label    = break_label;
4755         continue_label = header_block;
4756         break_label    = false_block;
4757
4758         /* Create the loop body. */
4759         set_cur_block(body_block);
4760         statement_to_firm(statement->body);
4761         jump_if_reachable(header_block);
4762
4763         mature_immBlock(header_block);
4764         assert(false_block == NULL || false_block == break_label);
4765         false_block = break_label;
4766         if (false_block != NULL) {
4767                 mature_immBlock(false_block);
4768         }
4769         set_cur_block(false_block);
4770
4771         assert(continue_label == header_block);
4772         continue_label = old_continue_label;
4773         break_label    = old_break_label;
4774 }
4775
4776 static ir_node *get_break_label(void)
4777 {
4778         if (break_label == NULL) {
4779                 break_label = new_immBlock();
4780         }
4781         return break_label;
4782 }
4783
4784 static void do_while_statement_to_firm(do_while_statement_t *statement)
4785 {
4786         /* create the header block */
4787         ir_node *header_block = new_immBlock();
4788
4789         /* the loop body */
4790         ir_node *body_block = new_immBlock();
4791         jump_if_reachable(body_block);
4792
4793         ir_node *old_continue_label = continue_label;
4794         ir_node *old_break_label    = break_label;
4795         continue_label              = header_block;
4796         break_label                 = NULL;
4797
4798         set_cur_block(body_block);
4799         statement_to_firm(statement->body);
4800         ir_node *const false_block = get_break_label();
4801
4802         assert(continue_label == header_block);
4803         continue_label = old_continue_label;
4804         break_label    = old_break_label;
4805
4806         jump_if_reachable(header_block);
4807
4808         /* create the condition */
4809         mature_immBlock(header_block);
4810         set_cur_block(header_block);
4811
4812         create_condition_evaluation(statement->condition, body_block, false_block);
4813         mature_immBlock(body_block);
4814         mature_immBlock(false_block);
4815
4816         set_cur_block(false_block);
4817 }
4818
4819 static void for_statement_to_firm(for_statement_t *statement)
4820 {
4821         /* create declarations */
4822         entity_t *entity = statement->scope.entities;
4823         for ( ; entity != NULL; entity = entity->base.next) {
4824                 if (!is_declaration(entity))
4825                         continue;
4826
4827                 create_local_declaration(entity);
4828         }
4829
4830         if (currently_reachable()) {
4831                 entity = statement->scope.entities;
4832                 for ( ; entity != NULL; entity = entity->base.next) {
4833                         if (!is_declaration(entity))
4834                                 continue;
4835
4836                         initialize_local_declaration(entity);
4837                 }
4838
4839                 if (statement->initialisation != NULL) {
4840                         expression_to_firm(statement->initialisation);
4841                 }
4842         }
4843
4844         /* Create the header block */
4845         ir_node *const header_block = new_immBlock();
4846         jump_if_reachable(header_block);
4847
4848         /* Create the condition. */
4849         ir_node *body_block;
4850         ir_node *false_block;
4851         if (statement->condition != NULL) {
4852                 body_block  = new_immBlock();
4853                 false_block = new_immBlock();
4854
4855                 set_cur_block(header_block);
4856                 create_condition_evaluation(statement->condition, body_block, false_block);
4857                 mature_immBlock(body_block);
4858         } else {
4859                 /* for-ever. */
4860                 body_block  = header_block;
4861                 false_block = NULL;
4862
4863                 keep_alive(header_block);
4864                 keep_all_memory(header_block);
4865         }
4866
4867         /* Create the step block, if necessary. */
4868         ir_node      *      step_block = header_block;
4869         expression_t *const step       = statement->step;
4870         if (step != NULL) {
4871                 step_block = new_immBlock();
4872         }
4873
4874         ir_node *const old_continue_label = continue_label;
4875         ir_node *const old_break_label    = break_label;
4876         continue_label = step_block;
4877         break_label    = false_block;
4878
4879         /* Create the loop body. */
4880         set_cur_block(body_block);
4881         statement_to_firm(statement->body);
4882         jump_if_reachable(step_block);
4883
4884         /* Create the step code. */
4885         if (step != NULL) {
4886                 mature_immBlock(step_block);
4887                 set_cur_block(step_block);
4888                 expression_to_firm(step);
4889                 jump_if_reachable(header_block);
4890         }
4891
4892         mature_immBlock(header_block);
4893         assert(false_block == NULL || false_block == break_label);
4894         false_block = break_label;
4895         if (false_block != NULL) {
4896                 mature_immBlock(false_block);
4897         }
4898         set_cur_block(false_block);
4899
4900         assert(continue_label == step_block);
4901         continue_label = old_continue_label;
4902         break_label    = old_break_label;
4903 }
4904
4905 static void create_jump_statement(const statement_t *statement,
4906                                   ir_node *target_block)
4907 {
4908         if (!currently_reachable())
4909                 return;
4910
4911         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4912         ir_node  *jump = new_d_Jmp(dbgi);
4913         add_immBlock_pred(target_block, jump);
4914
4915         set_unreachable_now();
4916 }
4917
4918 static void switch_statement_to_firm(switch_statement_t *statement)
4919 {
4920         ir_node  *first_block = NULL;
4921         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4922         ir_node  *cond        = NULL;
4923
4924         if (currently_reachable()) {
4925                 ir_node *expression = expression_to_firm(statement->expression);
4926                 cond                = new_d_Cond(dbgi, expression);
4927                 first_block         = get_cur_block();
4928         }
4929
4930         set_unreachable_now();
4931
4932         ir_node *const old_switch_cond       = current_switch_cond;
4933         ir_node *const old_break_label       = break_label;
4934         const bool     old_saw_default_label = saw_default_label;
4935         saw_default_label                    = false;
4936         current_switch_cond                  = cond;
4937         break_label                          = NULL;
4938         switch_statement_t *const old_switch = current_switch;
4939         current_switch                       = statement;
4940
4941         /* determine a free number for the default label */
4942         unsigned long num_cases       = 0;
4943         long          default_proj_nr = 0;
4944         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4945                 if (l->expression == NULL) {
4946                         /* default case */
4947                         continue;
4948                 }
4949                 if (l->last_case >= l->first_case)
4950                         num_cases += l->last_case - l->first_case + 1;
4951                 if (l->last_case > default_proj_nr)
4952                         default_proj_nr = l->last_case;
4953         }
4954
4955         if (default_proj_nr == LONG_MAX) {
4956                 /* Bad: an overflow will occur, we cannot be sure that the
4957                  * maximum + 1 is a free number. Scan the values a second
4958                  * time to find a free number.
4959                  */
4960                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4961
4962                 memset(bits, 0, (num_cases + 7) >> 3);
4963                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4964                         if (l->expression == NULL) {
4965                                 /* default case */
4966                                 continue;
4967                         }
4968                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4969                         if (start < num_cases && l->last_case >= 0) {
4970                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4971                                         (unsigned long)l->last_case : num_cases - 1;
4972                                 for (unsigned long cns = start; cns <= end; ++cns) {
4973                                         bits[cns >> 3] |= (1 << (cns & 7));
4974                                 }
4975                         }
4976                 }
4977                 /* We look at the first num_cases constants:
4978                  * Either they are dense, so we took the last (num_cases)
4979                  * one, or they are not dense, so we will find one free
4980                  * there...
4981                  */
4982                 unsigned long i;
4983                 for (i = 0; i < num_cases; ++i)
4984                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4985                                 break;
4986
4987                 free(bits);
4988                 default_proj_nr = i;
4989         } else {
4990                 ++default_proj_nr;
4991         }
4992         statement->default_proj_nr = default_proj_nr;
4993         /* safety check: cond might already be folded to a Bad */
4994         if (cond != NULL && is_Cond(cond)) {
4995                 set_Cond_default_proj(cond, default_proj_nr);
4996         }
4997
4998         statement_to_firm(statement->body);
4999
5000         jump_if_reachable(get_break_label());
5001
5002         if (!saw_default_label && first_block != NULL) {
5003                 set_cur_block(first_block);
5004                 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5005                 add_immBlock_pred(get_break_label(), proj);
5006         }
5007
5008         if (break_label != NULL) {
5009                 mature_immBlock(break_label);
5010         }
5011         set_cur_block(break_label);
5012
5013         assert(current_switch_cond == cond);
5014         current_switch      = old_switch;
5015         current_switch_cond = old_switch_cond;
5016         break_label         = old_break_label;
5017         saw_default_label   = old_saw_default_label;
5018 }
5019
5020 static void case_label_to_firm(const case_label_statement_t *statement)
5021 {
5022         if (statement->is_empty_range)
5023                 return;
5024
5025         ir_node *block = new_immBlock();
5026         /* Fallthrough from previous case */
5027         jump_if_reachable(block);
5028
5029         if (current_switch_cond != NULL) {
5030                 set_cur_block(get_nodes_block(current_switch_cond));
5031                 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5032                 if (statement->expression != NULL) {
5033                         long pn     = statement->first_case;
5034                         long end_pn = statement->last_case;
5035                         assert(pn <= end_pn);
5036                         /* create jumps for all cases in the given range */
5037                         do {
5038                                 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5039                                 add_immBlock_pred(block, proj);
5040                         } while (pn++ < end_pn);
5041                 } else {
5042                         saw_default_label = true;
5043                         ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5044                                                          current_switch->default_proj_nr);
5045                         add_immBlock_pred(block, proj);
5046                 }
5047         }
5048
5049         mature_immBlock(block);
5050         set_cur_block(block);
5051
5052         statement_to_firm(statement->statement);
5053 }
5054
5055 static void label_to_firm(const label_statement_t *statement)
5056 {
5057         ir_node *block = get_label_block(statement->label);
5058         jump_if_reachable(block);
5059
5060         set_cur_block(block);
5061         keep_alive(block);
5062         keep_all_memory(block);
5063
5064         statement_to_firm(statement->statement);
5065 }
5066
5067 static void goto_to_firm(const goto_statement_t *statement)
5068 {
5069         if (!currently_reachable())
5070                 return;
5071
5072         if (statement->expression) {
5073                 ir_node  *irn  = expression_to_firm(statement->expression);
5074                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5075                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5076
5077                 set_irn_link(ijmp, ijmp_list);
5078                 ijmp_list = ijmp;
5079         } else {
5080                 ir_node *block = get_label_block(statement->label);
5081                 ir_node *jmp   = new_Jmp();
5082                 add_immBlock_pred(block, jmp);
5083         }
5084         set_unreachable_now();
5085 }
5086
5087 static void asm_statement_to_firm(const asm_statement_t *statement)
5088 {
5089         bool needs_memory = false;
5090
5091         if (statement->is_volatile) {
5092                 needs_memory = true;
5093         }
5094
5095         size_t         n_clobbers = 0;
5096         asm_clobber_t *clobber    = statement->clobbers;
5097         for ( ; clobber != NULL; clobber = clobber->next) {
5098                 const char *clobber_str = clobber->clobber.begin;
5099
5100                 if (!be_is_valid_clobber(clobber_str)) {
5101                         errorf(&statement->base.source_position,
5102                                    "invalid clobber '%s' specified", clobber->clobber);
5103                         continue;
5104                 }
5105
5106                 if (streq(clobber_str, "memory")) {
5107                         needs_memory = true;
5108                         continue;
5109                 }
5110
5111                 ident *id = new_id_from_str(clobber_str);
5112                 obstack_ptr_grow(&asm_obst, id);
5113                 ++n_clobbers;
5114         }
5115         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5116         ident **clobbers = NULL;
5117         if (n_clobbers > 0) {
5118                 clobbers = obstack_finish(&asm_obst);
5119         }
5120
5121         size_t n_inputs  = 0;
5122         asm_argument_t *argument = statement->inputs;
5123         for ( ; argument != NULL; argument = argument->next)
5124                 n_inputs++;
5125         size_t n_outputs = 0;
5126         argument = statement->outputs;
5127         for ( ; argument != NULL; argument = argument->next)
5128                 n_outputs++;
5129
5130         unsigned next_pos = 0;
5131
5132         ir_node *ins[n_inputs + n_outputs + 1];
5133         size_t   in_size = 0;
5134
5135         ir_asm_constraint tmp_in_constraints[n_outputs];
5136
5137         const expression_t *out_exprs[n_outputs];
5138         ir_node            *out_addrs[n_outputs];
5139         size_t              out_size = 0;
5140
5141         argument = statement->outputs;
5142         for ( ; argument != NULL; argument = argument->next) {
5143                 const char *constraints = argument->constraints.begin;
5144                 asm_constraint_flags_t asm_flags
5145                         = be_parse_asm_constraints(constraints);
5146
5147                 {
5148                         source_position_t const *const pos = &statement->base.source_position;
5149                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5150                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5151                         }
5152                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5153                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5154                                 continue;
5155                         }
5156                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5157                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5158                                 continue;
5159                         }
5160                 }
5161
5162                 unsigned pos = next_pos++;
5163                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5164                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5165                         expression_t *expr = argument->expression;
5166                         ir_node      *addr = expression_to_addr(expr);
5167                         /* in+output, construct an artifical same_as constraint on the
5168                          * input */
5169                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5170                                 char     buf[64];
5171                                 ir_node *value = get_value_from_lvalue(expr, addr);
5172
5173                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5174
5175                                 ir_asm_constraint constraint;
5176                                 constraint.pos              = pos;
5177                                 constraint.constraint       = new_id_from_str(buf);
5178                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5179                                 tmp_in_constraints[in_size] = constraint;
5180                                 ins[in_size] = value;
5181
5182                                 ++in_size;
5183                         }
5184
5185                         out_exprs[out_size] = expr;
5186                         out_addrs[out_size] = addr;
5187                         ++out_size;
5188                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5189                         /* pure memory ops need no input (but we have to make sure we
5190                          * attach to the memory) */
5191                         assert(! (asm_flags &
5192                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5193                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5194                         needs_memory = true;
5195
5196                         /* we need to attach the address to the inputs */
5197                         expression_t *expr = argument->expression;
5198
5199                         ir_asm_constraint constraint;
5200                         constraint.pos              = pos;
5201                         constraint.constraint       = new_id_from_str(constraints);
5202                         constraint.mode             = NULL;
5203                         tmp_in_constraints[in_size] = constraint;
5204
5205                         ins[in_size]          = expression_to_addr(expr);
5206                         ++in_size;
5207                         continue;
5208                 } else {
5209                         errorf(&statement->base.source_position,
5210                                "only modifiers but no place set in constraints '%s'",
5211                                constraints);
5212                         continue;
5213                 }
5214
5215                 ir_asm_constraint constraint;
5216                 constraint.pos        = pos;
5217                 constraint.constraint = new_id_from_str(constraints);
5218                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5219
5220                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5221         }
5222         assert(obstack_object_size(&asm_obst)
5223                         == out_size * sizeof(ir_asm_constraint));
5224         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5225
5226
5227         obstack_grow(&asm_obst, tmp_in_constraints,
5228                      in_size * sizeof(tmp_in_constraints[0]));
5229         /* find and count input and output arguments */
5230         argument = statement->inputs;
5231         for ( ; argument != NULL; argument = argument->next) {
5232                 const char *constraints = argument->constraints.begin;
5233                 asm_constraint_flags_t asm_flags
5234                         = be_parse_asm_constraints(constraints);
5235
5236                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5237                         errorf(&statement->base.source_position,
5238                                "some constraints in '%s' are not supported", constraints);
5239                         continue;
5240                 }
5241                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5242                         errorf(&statement->base.source_position,
5243                                "some constraints in '%s' are invalid", constraints);
5244                         continue;
5245                 }
5246                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5247                         errorf(&statement->base.source_position,
5248                                "write flag specified for input constraints '%s'",
5249                                constraints);
5250                         continue;
5251                 }
5252
5253                 ir_node *input;
5254                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5255                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5256                         /* we can treat this as "normal" input */
5257                         input = expression_to_firm(argument->expression);
5258                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5259                         /* pure memory ops need no input (but we have to make sure we
5260                          * attach to the memory) */
5261                         assert(! (asm_flags &
5262                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5263                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5264                         needs_memory = true;
5265                         input = expression_to_addr(argument->expression);
5266                 } else {
5267                         errorf(&statement->base.source_position,
5268                                "only modifiers but no place set in constraints '%s'",
5269                                constraints);
5270                         continue;
5271                 }
5272
5273                 ir_asm_constraint constraint;
5274                 constraint.pos        = next_pos++;
5275                 constraint.constraint = new_id_from_str(constraints);
5276                 constraint.mode       = get_irn_mode(input);
5277
5278                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5279                 ins[in_size++] = input;
5280         }
5281
5282         if (needs_memory) {
5283                 ir_asm_constraint constraint;
5284                 constraint.pos        = next_pos++;
5285                 constraint.constraint = new_id_from_str("");
5286                 constraint.mode       = mode_M;
5287
5288                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5289                 ins[in_size++] = get_store();
5290         }
5291
5292         assert(obstack_object_size(&asm_obst)
5293                         == in_size * sizeof(ir_asm_constraint));
5294         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5295
5296         /* create asm node */
5297         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5298
5299         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5300
5301         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5302                                   out_size, output_constraints,
5303                                   n_clobbers, clobbers, asm_text);
5304
5305         if (statement->is_volatile) {
5306                 set_irn_pinned(node, op_pin_state_pinned);
5307         } else {
5308                 set_irn_pinned(node, op_pin_state_floats);
5309         }
5310
5311         /* create output projs & connect them */
5312         if (needs_memory) {
5313                 ir_node *projm = new_Proj(node, mode_M, out_size);
5314                 set_store(projm);
5315         }
5316
5317         size_t i;
5318         for (i = 0; i < out_size; ++i) {
5319                 const expression_t *out_expr = out_exprs[i];
5320                 long                pn       = i;
5321                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5322                 ir_node            *proj     = new_Proj(node, mode, pn);
5323                 ir_node            *addr     = out_addrs[i];
5324
5325                 set_value_for_expression_addr(out_expr, proj, addr);
5326         }
5327 }
5328
5329 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5330 {
5331         statement_to_firm(statement->try_statement);
5332         source_position_t const *const pos = &statement->base.source_position;
5333         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5334 }
5335
5336 static void leave_statement_to_firm(leave_statement_t *statement)
5337 {
5338         errorf(&statement->base.source_position, "__leave not supported yet");
5339 }
5340
5341 /**
5342  * Transform a statement.
5343  */
5344 static void statement_to_firm(statement_t *statement)
5345 {
5346 #ifndef NDEBUG
5347         assert(!statement->base.transformed);
5348         statement->base.transformed = true;
5349 #endif
5350
5351         switch (statement->kind) {
5352         case STATEMENT_ERROR:
5353                 panic("error statement found");
5354         case STATEMENT_EMPTY:
5355                 /* nothing */
5356                 return;
5357         case STATEMENT_COMPOUND:
5358                 compound_statement_to_firm(&statement->compound);
5359                 return;
5360         case STATEMENT_RETURN:
5361                 return_statement_to_firm(&statement->returns);
5362                 return;
5363         case STATEMENT_EXPRESSION:
5364                 expression_statement_to_firm(&statement->expression);
5365                 return;
5366         case STATEMENT_IF:
5367                 if_statement_to_firm(&statement->ifs);
5368                 return;
5369         case STATEMENT_WHILE:
5370                 while_statement_to_firm(&statement->whiles);
5371                 return;
5372         case STATEMENT_DO_WHILE:
5373                 do_while_statement_to_firm(&statement->do_while);
5374                 return;
5375         case STATEMENT_DECLARATION:
5376                 declaration_statement_to_firm(&statement->declaration);
5377                 return;
5378         case STATEMENT_BREAK:
5379                 create_jump_statement(statement, get_break_label());
5380                 return;
5381         case STATEMENT_CONTINUE:
5382                 create_jump_statement(statement, continue_label);
5383                 return;
5384         case STATEMENT_SWITCH:
5385                 switch_statement_to_firm(&statement->switchs);
5386                 return;
5387         case STATEMENT_CASE_LABEL:
5388                 case_label_to_firm(&statement->case_label);
5389                 return;
5390         case STATEMENT_FOR:
5391                 for_statement_to_firm(&statement->fors);
5392                 return;
5393         case STATEMENT_LABEL:
5394                 label_to_firm(&statement->label);
5395                 return;
5396         case STATEMENT_GOTO:
5397                 goto_to_firm(&statement->gotos);
5398                 return;
5399         case STATEMENT_ASM:
5400                 asm_statement_to_firm(&statement->asms);
5401                 return;
5402         case STATEMENT_MS_TRY:
5403                 ms_try_statement_to_firm(&statement->ms_try);
5404                 return;
5405         case STATEMENT_LEAVE:
5406                 leave_statement_to_firm(&statement->leave);
5407                 return;
5408         }
5409         panic("statement not implemented");
5410 }
5411
5412 static int count_local_variables(const entity_t *entity,
5413                                  const entity_t *const last)
5414 {
5415         int count = 0;
5416         entity_t const *const end = last != NULL ? last->base.next : NULL;
5417         for (; entity != end; entity = entity->base.next) {
5418                 type_t *type;
5419                 bool    address_taken;
5420
5421                 if (entity->kind == ENTITY_VARIABLE) {
5422                         type          = skip_typeref(entity->declaration.type);
5423                         address_taken = entity->variable.address_taken;
5424                 } else if (entity->kind == ENTITY_PARAMETER) {
5425                         type          = skip_typeref(entity->declaration.type);
5426                         address_taken = entity->parameter.address_taken;
5427                 } else {
5428                         continue;
5429                 }
5430
5431                 if (!address_taken && is_type_scalar(type))
5432                         ++count;
5433         }
5434         return count;
5435 }
5436
5437 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5438 {
5439         int *const count = env;
5440
5441         switch (stmt->kind) {
5442         case STATEMENT_DECLARATION: {
5443                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5444                 *count += count_local_variables(decl_stmt->declarations_begin,
5445                                 decl_stmt->declarations_end);
5446                 break;
5447         }
5448
5449         case STATEMENT_FOR:
5450                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5451                 break;
5452
5453         default:
5454                 break;
5455         }
5456 }
5457
5458 /**
5459  * Return the number of local (alias free) variables used by a function.
5460  */
5461 static int get_function_n_local_vars(entity_t *entity)
5462 {
5463         const function_t *function = &entity->function;
5464         int count = 0;
5465
5466         /* count parameters */
5467         count += count_local_variables(function->parameters.entities, NULL);
5468
5469         /* count local variables declared in body */
5470         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5471         return count;
5472 }
5473
5474 /**
5475  * Build Firm code for the parameters of a function.
5476  */
5477 static void initialize_function_parameters(entity_t *entity)
5478 {
5479         assert(entity->kind == ENTITY_FUNCTION);
5480         ir_graph *irg             = current_ir_graph;
5481         ir_node  *args            = get_irg_args(irg);
5482         int       n               = 0;
5483         ir_type  *function_irtype;
5484
5485         if (entity->function.need_closure) {
5486                 /* add an extra parameter for the static link */
5487                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5488                 ++n;
5489
5490                 /* Matze: IMO this is wrong, nested functions should have an own
5491                  * type and not rely on strange parameters... */
5492                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5493         } else {
5494                 function_irtype = get_ir_type(entity->declaration.type);
5495         }
5496
5497
5498
5499         entity_t *parameter = entity->function.parameters.entities;
5500         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5501                 if (parameter->kind != ENTITY_PARAMETER)
5502                         continue;
5503
5504                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5505                 type_t *type = skip_typeref(parameter->declaration.type);
5506
5507                 bool needs_entity = parameter->parameter.address_taken;
5508                 assert(!is_type_array(type));
5509                 if (is_type_compound(type)) {
5510                         needs_entity = true;
5511                 }
5512
5513                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5514                 if (needs_entity) {
5515                         ir_type   *frame_type = get_irg_frame_type(irg);
5516                         ir_entity *param
5517                                 = new_parameter_entity(frame_type, n, param_irtype);
5518                         parameter->declaration.kind
5519                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5520                         parameter->parameter.v.entity = param;
5521                         continue;
5522                 }
5523
5524                 ir_mode *param_mode = get_type_mode(param_irtype);
5525                 long     pn         = n;
5526                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5527
5528                 ir_mode *mode = get_ir_mode_storage(type);
5529                 value = create_conv(NULL, value, mode);
5530                 value = do_strict_conv(NULL, value);
5531
5532                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5533                 parameter->parameter.v.value_number = next_value_number_function;
5534                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5535                                         parameter);
5536                 ++next_value_number_function;
5537
5538                 set_value(parameter->parameter.v.value_number, value);
5539         }
5540 }
5541
5542 /**
5543  * Handle additional decl modifiers for IR-graphs
5544  *
5545  * @param irg            the IR-graph
5546  * @param dec_modifiers  additional modifiers
5547  */
5548 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5549                                      decl_modifiers_t decl_modifiers)
5550 {
5551         if (decl_modifiers & DM_NAKED) {
5552                 /* TRUE if the declaration includes the Microsoft
5553                    __declspec(naked) specifier. */
5554                 add_irg_additional_properties(irg, mtp_property_naked);
5555         }
5556         if (decl_modifiers & DM_FORCEINLINE) {
5557                 /* TRUE if the declaration includes the
5558                    Microsoft __forceinline specifier. */
5559                 set_irg_inline_property(irg, irg_inline_forced);
5560         }
5561         if (decl_modifiers & DM_NOINLINE) {
5562                 /* TRUE if the declaration includes the Microsoft
5563                    __declspec(noinline) specifier. */
5564                 set_irg_inline_property(irg, irg_inline_forbidden);
5565         }
5566 }
5567
5568 static void add_function_pointer(ir_type *segment, ir_entity *method,
5569                                  const char *unique_template)
5570 {
5571         ir_type   *method_type  = get_entity_type(method);
5572         ir_type   *ptr_type     = new_type_pointer(method_type);
5573
5574         /* these entities don't really have a name but firm only allows
5575          * "" in ld_ident.
5576          * Note that we mustn't give these entities a name since for example
5577          * Mach-O doesn't allow them. */
5578         ident     *ide          = id_unique(unique_template);
5579         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5580         ir_graph  *irg          = get_const_code_irg();
5581         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5582                                                            method);
5583
5584         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5585         set_entity_compiler_generated(ptr, 1);
5586         set_entity_visibility(ptr, ir_visibility_private);
5587         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5588         set_atomic_ent_value(ptr, val);
5589 }
5590
5591 /**
5592  * Generate possible IJmp branches to a given label block.
5593  */
5594 static void gen_ijmp_branches(ir_node *block)
5595 {
5596         ir_node *ijmp;
5597         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5598                 add_immBlock_pred(block, ijmp);
5599         }
5600 }
5601
5602 /**
5603  * Create code for a function and all inner functions.
5604  *
5605  * @param entity  the function entity
5606  */
5607 static void create_function(entity_t *entity)
5608 {
5609         assert(entity->kind == ENTITY_FUNCTION);
5610         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5611
5612         if (entity->function.statement == NULL)
5613                 return;
5614
5615         inner_functions     = NULL;
5616         current_trampolines = NULL;
5617
5618         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5619                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5620                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5621         }
5622         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5623                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5624                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5625         }
5626
5627         current_function_entity = entity;
5628         current_function_name   = NULL;
5629         current_funcsig         = NULL;
5630
5631         assert(all_labels == NULL);
5632         all_labels = NEW_ARR_F(label_t *, 0);
5633         ijmp_list  = NULL;
5634
5635         int       n_local_vars = get_function_n_local_vars(entity);
5636         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5637         current_ir_graph = irg;
5638
5639         ir_graph *old_current_function = current_function;
5640         current_function = irg;
5641
5642         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5643         current_vararg_entity = NULL;
5644
5645         set_irg_fp_model(irg, firm_fp_model);
5646         tarval_enable_fp_ops(1);
5647         set_irn_dbg_info(get_irg_start_block(irg),
5648                          get_entity_dbg_info(function_entity));
5649
5650         ir_node *first_block = get_cur_block();
5651
5652         /* set inline flags */
5653         if (entity->function.is_inline)
5654                 set_irg_inline_property(irg, irg_inline_recomended);
5655         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5656
5657         next_value_number_function = 0;
5658         initialize_function_parameters(entity);
5659         current_static_link = entity->function.static_link;
5660
5661         statement_to_firm(entity->function.statement);
5662
5663         ir_node *end_block = get_irg_end_block(irg);
5664
5665         /* do we have a return statement yet? */
5666         if (currently_reachable()) {
5667                 type_t *type = skip_typeref(entity->declaration.type);
5668                 assert(is_type_function(type));
5669                 const function_type_t *func_type   = &type->function;
5670                 const type_t          *return_type
5671                         = skip_typeref(func_type->return_type);
5672
5673                 ir_node *ret;
5674                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5675                         ret = new_Return(get_store(), 0, NULL);
5676                 } else {
5677                         ir_mode *mode;
5678                         if (is_type_scalar(return_type)) {
5679                                 mode = get_ir_mode_storage(func_type->return_type);
5680                         } else {
5681                                 mode = mode_P_data;
5682                         }
5683
5684                         ir_node *in[1];
5685                         /* §5.1.2.2.3 main implicitly returns 0 */
5686                         if (is_main(entity)) {
5687                                 in[0] = new_Const(get_mode_null(mode));
5688                         } else {
5689                                 in[0] = new_Unknown(mode);
5690                         }
5691                         ret = new_Return(get_store(), 1, in);
5692                 }
5693                 add_immBlock_pred(end_block, ret);
5694         }
5695
5696         bool has_computed_gotos = false;
5697         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5698                 label_t *label = all_labels[i];
5699                 if (label->address_taken) {
5700                         gen_ijmp_branches(label->block);
5701                         has_computed_gotos = true;
5702                 }
5703                 mature_immBlock(label->block);
5704         }
5705         if (has_computed_gotos) {
5706                 /* if we have computed goto's in the function, we cannot inline it */
5707                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5708                         source_position_t const *const pos = &entity->base.source_position;
5709                         warningf(WARN_OTHER, pos, "'%N' can never be inlined because it contains a computed goto", entity);
5710                 }
5711                 set_irg_inline_property(irg, irg_inline_forbidden);
5712         }
5713
5714         DEL_ARR_F(all_labels);
5715         all_labels = NULL;
5716
5717         mature_immBlock(first_block);
5718         mature_immBlock(end_block);
5719
5720         irg_finalize_cons(irg);
5721
5722         /* finalize the frame type */
5723         ir_type *frame_type = get_irg_frame_type(irg);
5724         int      n          = get_compound_n_members(frame_type);
5725         int      align_all  = 4;
5726         int      offset     = 0;
5727         for (int i = 0; i < n; ++i) {
5728                 ir_entity *member      = get_compound_member(frame_type, i);
5729                 ir_type   *entity_type = get_entity_type(member);
5730
5731                 int align = get_type_alignment_bytes(entity_type);
5732                 if (align > align_all)
5733                         align_all = align;
5734                 int misalign = 0;
5735                 if (align > 0) {
5736                         misalign  = offset % align;
5737                         if (misalign > 0) {
5738                                 offset += align - misalign;
5739                         }
5740                 }
5741
5742                 set_entity_offset(member, offset);
5743                 offset += get_type_size_bytes(entity_type);
5744         }
5745         set_type_size_bytes(frame_type, offset);
5746         set_type_alignment_bytes(frame_type, align_all);
5747
5748         irg_verify(irg, VERIFY_ENFORCE_SSA);
5749         current_vararg_entity = old_current_vararg_entity;
5750         current_function      = old_current_function;
5751
5752         if (current_trampolines != NULL) {
5753                 DEL_ARR_F(current_trampolines);
5754                 current_trampolines = NULL;
5755         }
5756
5757         /* create inner functions if any */
5758         entity_t **inner = inner_functions;
5759         if (inner != NULL) {
5760                 ir_type *rem_outer_frame      = current_outer_frame;
5761                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5762                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5763                         create_function(inner[i]);
5764                 }
5765                 DEL_ARR_F(inner);
5766
5767                 current_outer_frame      = rem_outer_frame;
5768         }
5769 }
5770
5771 static void scope_to_firm(scope_t *scope)
5772 {
5773         /* first pass: create declarations */
5774         entity_t *entity = scope->entities;
5775         for ( ; entity != NULL; entity = entity->base.next) {
5776                 if (entity->base.symbol == NULL)
5777                         continue;
5778
5779                 if (entity->kind == ENTITY_FUNCTION) {
5780                         if (entity->function.btk != BUILTIN_NONE) {
5781                                 /* builtins have no representation */
5782                                 continue;
5783                         }
5784                         (void)get_function_entity(entity, NULL);
5785                 } else if (entity->kind == ENTITY_VARIABLE) {
5786                         create_global_variable(entity);
5787                 } else if (entity->kind == ENTITY_NAMESPACE) {
5788                         scope_to_firm(&entity->namespacee.members);
5789                 }
5790         }
5791
5792         /* second pass: create code/initializers */
5793         entity = scope->entities;
5794         for ( ; entity != NULL; entity = entity->base.next) {
5795                 if (entity->base.symbol == NULL)
5796                         continue;
5797
5798                 if (entity->kind == ENTITY_FUNCTION) {
5799                         if (entity->function.btk != BUILTIN_NONE) {
5800                                 /* builtins have no representation */
5801                                 continue;
5802                         }
5803                         create_function(entity);
5804                 } else if (entity->kind == ENTITY_VARIABLE) {
5805                         assert(entity->declaration.kind
5806                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5807                         current_ir_graph = get_const_code_irg();
5808                         create_variable_initializer(entity);
5809                 }
5810         }
5811 }
5812
5813 void init_ast2firm(void)
5814 {
5815         obstack_init(&asm_obst);
5816         init_atomic_modes();
5817
5818         ir_set_debug_retrieve(dbg_retrieve);
5819         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5820
5821         /* create idents for all known runtime functions */
5822         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5823                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5824         }
5825
5826         entitymap_init(&entitymap);
5827 }
5828
5829 static void init_ir_types(void)
5830 {
5831         static int ir_types_initialized = 0;
5832         if (ir_types_initialized)
5833                 return;
5834         ir_types_initialized = 1;
5835
5836         ir_type_int        = get_ir_type(type_int);
5837         ir_type_char       = get_ir_type(type_char);
5838         ir_type_const_char = get_ir_type(type_const_char);
5839         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5840         ir_type_void       = get_ir_type(type_void);
5841
5842         be_params             = be_get_backend_param();
5843         mode_float_arithmetic = be_params->mode_float_arithmetic;
5844
5845         stack_param_align     = be_params->stack_param_align;
5846 }
5847
5848 void exit_ast2firm(void)
5849 {
5850         entitymap_destroy(&entitymap);
5851         obstack_free(&asm_obst, NULL);
5852 }
5853
5854 static void global_asm_to_firm(statement_t *s)
5855 {
5856         for (; s != NULL; s = s->base.next) {
5857                 assert(s->kind == STATEMENT_ASM);
5858
5859                 char const *const text = s->asms.asm_text.begin;
5860                 size_t            size = s->asms.asm_text.size;
5861
5862                 /* skip the last \0 */
5863                 if (text[size - 1] == '\0')
5864                         --size;
5865
5866                 ident *const id = new_id_from_chars(text, size);
5867                 add_irp_asm(id);
5868         }
5869 }
5870
5871 void translation_unit_to_firm(translation_unit_t *unit)
5872 {
5873         /* initialize firm arithmetic */
5874         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5875         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5876
5877         /* just to be sure */
5878         continue_label           = NULL;
5879         break_label              = NULL;
5880         current_switch_cond      = NULL;
5881         current_translation_unit = unit;
5882
5883         init_ir_types();
5884
5885         scope_to_firm(&unit->scope);
5886         global_asm_to_firm(unit->global_asm);
5887
5888         current_ir_graph         = NULL;
5889         current_translation_unit = NULL;
5890 }