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/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "printer.h"
  50 #include "entitymap_t.h"
  51 #include "driver/firm_opt.h"
  52 #include "driver/firm_cmdline.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 static const backend_params *be_params;
  61
  62 static ir_type *ir_type_char;
  63 static ir_type *ir_type_const_char;
  64 static ir_type *ir_type_wchar_t;
  65 static ir_type *ir_type_void;
  66 static ir_type *ir_type_int;
  67
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int        next_value_number_function;
  75 static ir_node   *continue_label;
  76 static ir_node   *break_label;
  77 static ir_node   *current_switch_cond;
  78 static bool       saw_default_label;
  79 static label_t  **all_labels;
  80 static entity_t **inner_functions;
  81 static ir_node   *ijmp_list;
  82 static bool       constant_folding;
  83 static bool       initializer_use_bitfield_basetype;
  84
  85 extern bool       have_const_functions;
  86
  87 static const entity_t     *current_function_entity;
  88 static ir_node            *current_function_name;
  89 static ir_node            *current_funcsig;
  90 static switch_statement_t *current_switch;
  91 static ir_graph           *current_function;
  92 static translation_unit_t *current_translation_unit;
  93 static trampoline_region  *current_trampolines;
  94 static ir_type            *current_outer_frame;
  95 static ir_type            *current_outer_value_type;
  96 static ir_node            *current_static_link;
  97
  98 static entitymap_t  entitymap;
  99
 100 static struct obstack asm_obst;
 101
 102 typedef enum declaration_kind_t {
 103         DECLARATION_KIND_UNKNOWN,
 104         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 105         DECLARATION_KIND_GLOBAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE,
 107         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 108         DECLARATION_KIND_PARAMETER,
 109         DECLARATION_KIND_PARAMETER_ENTITY,
 110         DECLARATION_KIND_FUNCTION,
 111         DECLARATION_KIND_COMPOUND_MEMBER,
 112         DECLARATION_KIND_INNER_FUNCTION
 113 } declaration_kind_t;
 114
 115 static ir_mode *get_ir_mode_storage(type_t *type);
 116 /*
 117  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 118  * int that it returns bigger modes for floating point on some platforms
 119  * (x87 internally does arithemtic with 80bits)
 120  */
 121 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 122
 123 static ir_type *get_ir_type_incomplete(type_t *type);
 124
 125 static void enqueue_inner_function(entity_t *entity)
 126 {
 127         if (inner_functions == NULL)
 128                 inner_functions = NEW_ARR_F(entity_t *, 0);
 129         ARR_APP1(entity_t*, inner_functions, entity);
 130 }
 131
 132 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 133 {
 134         const entity_t *entity = get_irg_loc_description(irg, pos);
 135
 136         if (entity != NULL) {
 137                 warningf(&entity->base.source_position,
 138                          "%s '%#T' might be used uninitialized",
 139                          get_entity_kind_name(entity->kind),
 140                          entity->declaration.type, entity->base.symbol);
 141         }
 142         return new_r_Unknown(irg, mode);
 143 }
 144
 145 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 146 {
 147         const source_position_t *pos = (const source_position_t*) dbg;
 148         if (pos == NULL)
 149                 return NULL;
 150         if (line != NULL)
 151                 *line = pos->linenr;
 152         return pos->input_name;
 153 }
 154
 155 static dbg_info *get_dbg_info(const source_position_t *pos)
 156 {
 157         return (dbg_info*) pos;
 158 }
 159
 160 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 161                                     const type_dbg_info *dbg)
 162 {
 163         assert(dbg != NULL);
 164         print_to_buffer(buffer, buffer_size);
 165         const type_t *type = (const type_t*) dbg;
 166         print_type(type);
 167         finish_print_to_buffer();
 168 }
 169
 170 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 171 {
 172         return (type_dbg_info*) type;
 173 }
 174
 175 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 176
 177 static ir_mode *mode_int, *mode_uint;
 178
 179 static ir_node *_expression_to_firm(const expression_t *expression);
 180 static ir_node *expression_to_firm(const expression_t *expression);
 181 static void create_local_declaration(entity_t *entity);
 182
 183 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 184 {
 185         unsigned flags = get_atomic_type_flags(kind);
 186         unsigned size  = get_atomic_type_size(kind);
 187         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 188                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 189                 char            name[64];
 190                 ir_mode_sort    sort;
 191                 unsigned        bit_size     = size * 8;
 192                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 193                 unsigned        modulo_shift;
 194                 ir_mode_arithmetic arithmetic;
 195
 196                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 197                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 198                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 199                                  bit_size);
 200                         sort         = irms_int_number;
 201                         arithmetic   = irma_twos_complement;
 202                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 203                 } else {
 204                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 205                         snprintf(name, sizeof(name), "F%u", bit_size);
 206                         sort         = irms_float_number;
 207                         arithmetic   = irma_ieee754;
 208                         modulo_shift = 0;
 209                 }
 210                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 211                                    modulo_shift);
 212         }
 213
 214         return NULL;
 215 }
 216
 217 /**
 218  * Initialises the atomic modes depending on the machine size.
 219  */
 220 static void init_atomic_modes(void)
 221 {
 222         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 223                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 224         }
 225         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 226         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 227
 228         /* there's no real void type in firm */
 229         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 230
 231         /* initialize pointer modes */
 232         char            name[64];
 233         ir_mode_sort    sort         = irms_reference;
 234         unsigned        bit_size     = machine_size;
 235         bool            is_signed    = 0;
 236         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 237         unsigned        modulo_shift
 238                 = bit_size < machine_size ? machine_size : bit_size;
 239
 240         snprintf(name, sizeof(name), "p%u", machine_size);
 241         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 242                                         modulo_shift);
 243
 244         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 245         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 246
 247         /* Hmm, pointers should be machine size */
 248         set_modeP_data(ptr_mode);
 249         set_modeP_code(ptr_mode);
 250 }
 251
 252 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 253 {
 254         assert(kind <= ATOMIC_TYPE_LAST);
 255         return atomic_modes[kind];
 256 }
 257
 258 static ir_node *get_vla_size(array_type_t *const type)
 259 {
 260         ir_node *size_node = type->size_node;
 261         if (size_node == NULL) {
 262                 size_node = expression_to_firm(type->size_expression);
 263                 type->size_node = size_node;
 264         }
 265         return size_node;
 266 }
 267
 268 /**
 269  * Return a node representing the size of a type.
 270  */
 271 static ir_node *get_type_size_node(type_t *type)
 272 {
 273         type = skip_typeref(type);
 274
 275         if (is_type_array(type) && type->array.is_vla) {
 276                 ir_node *size_node = get_vla_size(&type->array);
 277                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 278                 ir_mode *mode      = get_irn_mode(size_node);
 279                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 280                 return real_size;
 281         }
 282
 283         ir_mode *mode = get_ir_mode_storage(type_size_t);
 284         symconst_symbol sym;
 285         sym.type_p = get_ir_type(type);
 286         return new_SymConst(mode, sym, symconst_type_size);
 287 }
 288
 289 static unsigned count_parameters(const function_type_t *function_type)
 290 {
 291         unsigned count = 0;
 292
 293         function_parameter_t *parameter = function_type->parameters;
 294         for ( ; parameter != NULL; parameter = parameter->next) {
 295                 ++count;
 296         }
 297
 298         return count;
 299 }
 300
 301 /**
 302  * Creates a Firm type for an atomic type
 303  */
 304 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 305 {
 306         ir_mode        *mode      = atomic_modes[akind];
 307         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 308         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 309         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 310
 311         set_type_alignment_bytes(irtype, alignment);
 312
 313         return irtype;
 314 }
 315
 316 /**
 317  * Creates a Firm type for a complex type
 318  */
 319 static ir_type *create_complex_type(const complex_type_t *type)
 320 {
 321         atomic_type_kind_t  kind = type->akind;
 322         ir_mode            *mode = atomic_modes[kind];
 323         ident              *id   = get_mode_ident(mode);
 324
 325         (void) id;
 326
 327         /* FIXME: finish the array */
 328         return NULL;
 329 }
 330
 331 /**
 332  * Creates a Firm type for an imaginary type
 333  */
 334 static ir_type *create_imaginary_type(imaginary_type_t *type)
 335 {
 336         return create_atomic_type(type->akind, (const type_t*) type);
 337 }
 338
 339 /**
 340  * return type of a parameter (and take transparent union gnu extension into
 341  * account)
 342  */
 343 static type_t *get_parameter_type(type_t *orig_type)
 344 {
 345         type_t *type = skip_typeref(orig_type);
 346         if (is_type_union(type)
 347                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 348                 compound_t *compound = type->compound.compound;
 349                 type                 = compound->members.entities->declaration.type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 356 {
 357         type_t        *return_type  = skip_typeref(function_type->return_type);
 358
 359         int            n_parameters = count_parameters(function_type)
 360                                        + (for_closure ? 1 : 0);
 361         int            n_results    = return_type == type_void ? 0 : 1;
 362         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 363         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         if (for_closure) {
 373                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 374                 set_method_param_type(irtype, n, p_irtype);
 375                 ++n;
 376         }
 377         for ( ; parameter != NULL; parameter = parameter->next) {
 378                 type_t  *type     = get_parameter_type(parameter->type);
 379                 ir_type *p_irtype = get_ir_type(type);
 380                 set_method_param_type(irtype, n, p_irtype);
 381                 ++n;
 382         }
 383
 384         bool is_variadic = function_type->variadic;
 385
 386         if (is_variadic)
 387                 set_method_variadicity(irtype, variadicity_variadic);
 388
 389         unsigned cc = get_method_calling_convention(irtype);
 390         switch (function_type->calling_convention) {
 391         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 392         case CC_CDECL:
 393 is_cdecl:
 394                 set_method_calling_convention(irtype, SET_CDECL(cc));
 395                 break;
 396
 397         case CC_STDCALL:
 398                 if (is_variadic)
 399                         goto is_cdecl;
 400
 401                 /* only non-variadic function can use stdcall, else use cdecl */
 402                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 403                 break;
 404
 405         case CC_FASTCALL:
 406                 if (is_variadic)
 407                         goto is_cdecl;
 408                 /* only non-variadic function can use fastcall, else use cdecl */
 409                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 410                 break;
 411
 412         case CC_THISCALL:
 413                 /* Hmm, leave default, not accepted by the parser yet. */
 414                 break;
 415         }
 416
 417         if (for_closure)
 418                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 419
 420         return irtype;
 421 }
 422
 423 static ir_type *create_pointer_type(pointer_type_t *type)
 424 {
 425         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 426         type_t        *points_to    = type->points_to;
 427         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 428         ir_type       *ir_type      = new_d_type_pointer(ir_points_to, dbgi);
 429
 430         return ir_type;
 431 }
 432
 433 static ir_type *create_reference_type(reference_type_t *type)
 434 {
 435         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 436         type_t        *refers_to    = type->refers_to;
 437         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 438         ir_type       *ir_type      = new_d_type_pointer(ir_refers_to, dbgi);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_type *create_array_type(array_type_t *type)
 444 {
 445         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 446         type_t        *element_type    = type->element_type;
 447         ir_type       *ir_element_type = get_ir_type(element_type);
 448         ir_type       *ir_type         = new_d_type_array(1, ir_element_type, dbgi);
 449
 450         const int align = get_type_alignment_bytes(ir_element_type);
 451         set_type_alignment_bytes(ir_type, align);
 452
 453         if (type->size_constant) {
 454                 int n_elements = type->size;
 455
 456                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 457
 458                 size_t elemsize = get_type_size_bytes(ir_element_type);
 459                 if (elemsize % align > 0) {
 460                         elemsize += align - (elemsize % align);
 461                 }
 462                 set_type_size_bytes(ir_type, n_elements * elemsize);
 463         } else {
 464                 set_array_lower_bound_int(ir_type, 0, 0);
 465         }
 466         set_type_state(ir_type, layout_fixed);
 467
 468         return ir_type;
 469 }
 470
 471 /**
 472  * Return the signed integer type of size bits.
 473  *
 474  * @param size   the size
 475  */
 476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 477                                                  unsigned size,
 478                                                                                                  const type_t *type)
 479 {
 480         static ir_mode *s_modes[64 + 1] = {NULL, };
 481         ir_type *res;
 482         ir_mode *mode;
 483
 484         if (size <= 0 || size > 64)
 485                 return NULL;
 486
 487         mode = s_modes[size];
 488         if (mode == NULL) {
 489                 char name[32];
 490
 491                 snprintf(name, sizeof(name), "bf_I%u", size);
 492                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 493                                    size <= 32 ? 32 : size );
 494                 s_modes[size] = mode;
 495         }
 496
 497         type_dbg_info *dbgi = get_type_dbg_info_(type);
 498         res                 = new_d_type_primitive(mode, dbgi);
 499         set_primitive_base_type(res, base_tp);
 500
 501         return res;
 502 }
 503
 504 /**
 505  * Return the unsigned integer type of size bits.
 506  *
 507  * @param size   the size
 508  */
 509 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 510                                                    unsigned size,
 511                                                                                                    const type_t *type)
 512 {
 513         static ir_mode *u_modes[64 + 1] = {NULL, };
 514         ir_type *res;
 515         ir_mode *mode;
 516
 517         if (size <= 0 || size > 64)
 518                 return NULL;
 519
 520         mode = u_modes[size];
 521         if (mode == NULL) {
 522                 char name[32];
 523
 524                 snprintf(name, sizeof(name), "bf_U%u", size);
 525                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 526                                    size <= 32 ? 32 : size );
 527                 u_modes[size] = mode;
 528         }
 529
 530         type_dbg_info *dbgi = get_type_dbg_info_(type);
 531         res = new_d_type_primitive(mode, dbgi);
 532         set_primitive_base_type(res, base_tp);
 533
 534         return res;
 535 }
 536
 537 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 538 {
 539         type_t *base = skip_typeref(type->base_type);
 540         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 541         ir_type *irbase = get_ir_type(base);
 542
 543         unsigned size = type->bit_size;
 544
 545         assert(!is_type_float(base));
 546         if (is_type_signed(base)) {
 547                 return get_signed_int_type_for_bit_size(irbase, size,
 548                                                         (const type_t*) type);
 549         } else {
 550                 return get_unsigned_int_type_for_bit_size(irbase, size,
 551                                                           (const type_t*) type);
 552         }
 553 }
 554
 555 #define INVALID_TYPE ((ir_type_ptr)-1)
 556
 557 enum {
 558         COMPOUND_IS_STRUCT = false,
 559         COMPOUND_IS_UNION  = true
 560 };
 561
 562 /**
 563  * Construct firm type from ast struct type.
 564  */
 565 static ir_type *create_compound_type(compound_type_t *type,
 566                                      bool incomplete, bool is_union)
 567 {
 568         compound_t *compound = type->compound;
 569
 570         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 571                 return compound->irtype;
 572         }
 573
 574         symbol_t *symbol = compound->base.symbol;
 575         ident    *id;
 576         if (symbol != NULL) {
 577                 id = new_id_from_str(symbol->string);
 578         } else {
 579                 if (is_union) {
 580                         id = id_unique("__anonymous_union.%u");
 581                 } else {
 582                         id = id_unique("__anonymous_struct.%u");
 583                 }
 584         }
 585
 586         ir_type *irtype;
 587         if (is_union) {
 588                 irtype = new_type_union(id);
 589         } else {
 590                 irtype = new_type_struct(id);
 591         }
 592
 593         compound->irtype_complete = false;
 594         compound->irtype          = irtype;
 595
 596         if (incomplete)
 597                 return irtype;
 598
 599         if (is_union) {
 600                 layout_union_type(type);
 601         } else {
 602                 layout_struct_type(type);
 603         }
 604
 605         compound->irtype_complete = true;
 606
 607         entity_t *entry = compound->members.entities;
 608         for ( ; entry != NULL; entry = entry->base.next) {
 609                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 610                         continue;
 611
 612                 symbol_t *symbol     = entry->base.symbol;
 613                 type_t   *entry_type = entry->declaration.type;
 614                 ident    *ident;
 615                 if (symbol == NULL) {
 616                         /* anonymous bitfield member, skip */
 617                         if (entry_type->kind == TYPE_BITFIELD)
 618                                 continue;
 619                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 620                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 621                         ident = id_unique("anon.%u");
 622                 } else {
 623                         ident = new_id_from_str(symbol->string);
 624                 }
 625
 626                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 627
 628                 ir_type   *entry_irtype = get_ir_type(entry_type);
 629                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 630
 631                 set_entity_offset(entity, entry->compound_member.offset);
 632                 set_entity_offset_bits_remainder(entity,
 633                                                  entry->compound_member.bit_offset);
 634
 635                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 636                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 637                 entry->compound_member.entity = entity;
 638         }
 639
 640         set_type_alignment_bytes(irtype, compound->alignment);
 641         set_type_size_bytes(irtype, compound->size);
 642         set_type_state(irtype, layout_fixed);
 643
 644         return irtype;
 645 }
 646
 647 static ir_type *create_enum_type(enum_type_t *const type)
 648 {
 649         type->base.firm_type = ir_type_int;
 650
 651         ir_mode *const mode    = mode_int;
 652         tarval  *const one     = get_mode_one(mode);
 653         tarval  *      tv_next = get_tarval_null(mode);
 654
 655         bool constant_folding_old = constant_folding;
 656         constant_folding = true;
 657
 658         enum_t   *enume = type->enume;
 659         entity_t *entry = enume->base.next;
 660         for (; entry != NULL; entry = entry->base.next) {
 661                 if (entry->kind != ENTITY_ENUM_VALUE)
 662                         break;
 663
 664                 expression_t *const init = entry->enum_value.value;
 665                 if (init != NULL) {
 666                         ir_node *const cnst = expression_to_firm(init);
 667                         if (!is_Const(cnst)) {
 668                                 panic("couldn't fold constant");
 669                         }
 670                         tv_next = get_Const_tarval(cnst);
 671                 }
 672                 entry->enum_value.tv = tv_next;
 673                 tv_next = tarval_add(tv_next, one);
 674         }
 675
 676         constant_folding = constant_folding_old;
 677
 678         return create_atomic_type(type->akind, (const type_t*) type);
 679 }
 680
 681 static ir_type *get_ir_type_incomplete(type_t *type)
 682 {
 683         assert(type != NULL);
 684         type = skip_typeref(type);
 685
 686         if (type->base.firm_type != NULL) {
 687                 assert(type->base.firm_type != INVALID_TYPE);
 688                 return type->base.firm_type;
 689         }
 690
 691         switch (type->kind) {
 692         case TYPE_COMPOUND_STRUCT:
 693                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 694         case TYPE_COMPOUND_UNION:
 695                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 696         default:
 697                 return get_ir_type(type);
 698         }
 699 }
 700
 701 ir_type *get_ir_type(type_t *type)
 702 {
 703         assert(type != NULL);
 704
 705         type = skip_typeref(type);
 706
 707         if (type->base.firm_type != NULL) {
 708                 assert(type->base.firm_type != INVALID_TYPE);
 709                 return type->base.firm_type;
 710         }
 711
 712         ir_type *firm_type = NULL;
 713         switch (type->kind) {
 714         case TYPE_ERROR:
 715                 /* Happens while constant folding, when there was an error */
 716                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 717
 718         case TYPE_ATOMIC:
 719                 firm_type = create_atomic_type(type->atomic.akind, type);
 720                 break;
 721         case TYPE_COMPLEX:
 722                 firm_type = create_complex_type(&type->complex);
 723                 break;
 724         case TYPE_IMAGINARY:
 725                 firm_type = create_imaginary_type(&type->imaginary);
 726                 break;
 727         case TYPE_FUNCTION:
 728                 firm_type = create_method_type(&type->function, false);
 729                 break;
 730         case TYPE_POINTER:
 731                 firm_type = create_pointer_type(&type->pointer);
 732                 break;
 733         case TYPE_REFERENCE:
 734                 firm_type = create_reference_type(&type->reference);
 735                 break;
 736         case TYPE_ARRAY:
 737                 firm_type = create_array_type(&type->array);
 738                 break;
 739         case TYPE_COMPOUND_STRUCT:
 740                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 741                 break;
 742         case TYPE_COMPOUND_UNION:
 743                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 744                 break;
 745         case TYPE_ENUM:
 746                 firm_type = create_enum_type(&type->enumt);
 747                 break;
 748         case TYPE_BUILTIN:
 749                 firm_type = get_ir_type(type->builtin.real_type);
 750                 break;
 751         case TYPE_BITFIELD:
 752                 firm_type = create_bitfield_type(&type->bitfield);
 753                 break;
 754
 755         case TYPE_TYPEOF:
 756         case TYPE_TYPEDEF:
 757         case TYPE_INVALID:
 758                 break;
 759         }
 760         if (firm_type == NULL)
 761                 panic("unknown type found");
 762
 763         type->base.firm_type = firm_type;
 764         return firm_type;
 765 }
 766
 767 static ir_mode *get_ir_mode_storage(type_t *type)
 768 {
 769         ir_type *irtype = get_ir_type(type);
 770
 771         /* firm doesn't report a mode for arrays somehow... */
 772         if (is_Array_type(irtype)) {
 773                 return mode_P_data;
 774         }
 775
 776         ir_mode *mode = get_type_mode(irtype);
 777         assert(mode != NULL);
 778         return mode;
 779 }
 780
 781 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 782 {
 783         ir_mode *mode = get_ir_mode_storage(type);
 784         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 785                 return mode_float_arithmetic;
 786         }
 787
 788         return mode;
 789 }
 790
 791 /** Names of the runtime functions. */
 792 static const struct {
 793         int        id;           /**< the rts id */
 794         int        n_res;        /**< number of return values */
 795         const char *name;        /**< the name of the rts function */
 796         int        n_params;     /**< number of parameters */
 797         unsigned   flags;        /**< language flags */
 798 } rts_data[] = {
 799         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 800         { rts_abort,      0, "abort",        0, _C89 },
 801         { rts_alloca,     1, "alloca",       1, _ALL },
 802         { rts_abs,        1, "abs",          1, _C89 },
 803         { rts_labs,       1, "labs",         1, _C89 },
 804         { rts_llabs,      1, "llabs",        1, _C99 },
 805         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 806
 807         { rts_fabs,       1, "fabs",         1, _C89 },
 808         { rts_sqrt,       1, "sqrt",         1, _C89 },
 809         { rts_cbrt,       1, "cbrt",         1, _C99 },
 810         { rts_exp,        1, "exp",          1, _C89 },
 811         { rts_exp2,       1, "exp2",         1, _C89 },
 812         { rts_exp10,      1, "exp10",        1, _GNUC },
 813         { rts_log,        1, "log",          1, _C89 },
 814         { rts_log2,       1, "log2",         1, _C89 },
 815         { rts_log10,      1, "log10",        1, _C89 },
 816         { rts_pow,        1, "pow",          2, _C89 },
 817         { rts_sin,        1, "sin",          1, _C89 },
 818         { rts_cos,        1, "cos",          1, _C89 },
 819         { rts_tan,        1, "tan",          1, _C89 },
 820         { rts_asin,       1, "asin",         1, _C89 },
 821         { rts_acos,       1, "acos",         1, _C89 },
 822         { rts_atan,       1, "atan",         1, _C89 },
 823         { rts_sinh,       1, "sinh",         1, _C89 },
 824         { rts_cosh,       1, "cosh",         1, _C89 },
 825         { rts_tanh,       1, "tanh",         1, _C89 },
 826
 827         { rts_fabsf,      1, "fabsf",        1, _C99 },
 828         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 829         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 830         { rts_expf,       1, "expf",         1, _C99 },
 831         { rts_exp2f,      1, "exp2f",        1, _C99 },
 832         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 833         { rts_logf,       1, "logf",         1, _C99 },
 834         { rts_log2f,      1, "log2f",        1, _C99 },
 835         { rts_log10f,     1, "log10f",       1, _C99 },
 836         { rts_powf,       1, "powf",         2, _C99 },
 837         { rts_sinf,       1, "sinf",         1, _C99 },
 838         { rts_cosf,       1, "cosf",         1, _C99 },
 839         { rts_tanf,       1, "tanf",         1, _C99 },
 840         { rts_asinf,      1, "asinf",        1, _C99 },
 841         { rts_acosf,      1, "acosf",        1, _C99 },
 842         { rts_atanf,      1, "atanf",        1, _C99 },
 843         { rts_sinhf,      1, "sinhf",        1, _C99 },
 844         { rts_coshf,      1, "coshf",        1, _C99 },
 845         { rts_tanhf,      1, "tanhf",        1, _C99 },
 846
 847         { rts_fabsl,      1, "fabsl",        1, _C99 },
 848         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 849         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 850         { rts_expl,       1, "expl",         1, _C99 },
 851         { rts_exp2l,      1, "exp2l",        1, _C99 },
 852         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 853         { rts_logl,       1, "logl",         1, _C99 },
 854         { rts_log2l,      1, "log2l",        1, _C99 },
 855         { rts_log10l,     1, "log10l",       1, _C99 },
 856         { rts_powl,       1, "powl",         2, _C99 },
 857         { rts_sinl,       1, "sinl",         1, _C99 },
 858         { rts_cosl,       1, "cosl",         1, _C99 },
 859         { rts_tanl,       1, "tanl",         1, _C99 },
 860         { rts_asinl,      1, "asinl",        1, _C99 },
 861         { rts_acosl,      1, "acosl",        1, _C99 },
 862         { rts_atanl,      1, "atanl",        1, _C99 },
 863         { rts_sinhl,      1, "sinhl",        1, _C99 },
 864         { rts_coshl,      1, "coshl",        1, _C99 },
 865         { rts_tanhl,      1, "tanhl",        1, _C99 },
 866
 867         { rts_strcmp,     1, "strcmp",       2, _C89 },
 868         { rts_strncmp,    1, "strncmp",      3, _C89 },
 869         { rts_strcpy,     1, "strcpy",       2, _C89 },
 870         { rts_strlen,     1, "strlen",       1, _C89 },
 871         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 872         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 873         { rts_memmove,    1, "memmove",      3, _C89 },  /* HMM, man say its C99 */
 874         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 875         { rts_memcmp,     1, "memcmp",       3, _C89 },  /* HMM, man say its C99 */
 876 };
 877
 878 static ident *rts_idents[lengthof(rts_data)];
 879
 880 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 881
 882 /**
 883  * Handle GNU attributes for entities
 884  *
 885  * @param ent   the entity
 886  * @param decl  the routine declaration
 887  */
 888 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 889 {
 890         assert(is_declaration(entity));
 891         decl_modifiers_t modifiers = entity->declaration.modifiers;
 892
 893         if (is_method_entity(irentity)) {
 894                 if (modifiers & DM_PURE) {
 895                         set_entity_additional_property(irentity, mtp_property_pure);
 896                 }
 897                 if (modifiers & DM_CONST) {
 898                         set_entity_additional_property(irentity, mtp_property_const);
 899                         have_const_functions = true;
 900                 }
 901         }
 902         if (modifiers & DM_USED) {
 903                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 904         }
 905         if (modifiers & DM_WEAK) {
 906                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 907         }
 908 }
 909
 910 static bool is_main(entity_t *entity)
 911 {
 912         static symbol_t *sym_main = NULL;
 913         if (sym_main == NULL) {
 914                 sym_main = symbol_table_insert("main");
 915         }
 916
 917         if (entity->base.symbol != sym_main)
 918                 return false;
 919         /* must be in outermost scope */
 920         if (entity->base.parent_scope != &current_translation_unit->scope)
 921                 return false;
 922
 923         return true;
 924 }
 925
 926 /**
 927  * Creates an entity representing a function.
 928  *
 929  * @param declaration  the function declaration
 930  * @param owner_type   the owner type of this function, NULL
 931  *                     for global functions
 932  */
 933 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 934 {
 935         assert(entity->kind == ENTITY_FUNCTION);
 936         if (entity->function.irentity != NULL) {
 937                 return entity->function.irentity;
 938         }
 939
 940         if (is_main(entity)) {
 941                 /* force main to C linkage */
 942                 type_t *type = entity->declaration.type;
 943                 assert(is_type_function(type));
 944                 if (type->function.linkage != LINKAGE_C) {
 945                         type_t *new_type           = duplicate_type(type);
 946                         new_type->function.linkage = LINKAGE_C;
 947                         type                       = identify_new_type(new_type);
 948                         entity->declaration.type   = type;
 949                 }
 950         }
 951
 952         symbol_t *symbol = entity->base.symbol;
 953         ident    *id     = new_id_from_str(symbol->string);
 954
 955
 956         /* already an entity defined? */
 957         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 958         bool const has_body = entity->function.statement != NULL;
 959         if (irentity != NULL) {
 960                 if (get_entity_visibility(irentity) == ir_visibility_external
 961                                 && has_body) {
 962                         set_entity_visibility(irentity, ir_visibility_default);
 963                 }
 964                 goto entity_created;
 965         }
 966
 967         ir_type *ir_type_method;
 968         if (entity->function.need_closure)
 969                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 970         else
 971                 ir_type_method = get_ir_type(entity->declaration.type);
 972
 973         bool nested_function = false;
 974         if (owner_type == NULL)
 975                 owner_type = get_glob_type();
 976         else
 977                 nested_function = true;
 978
 979         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 980         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 981
 982         ident *ld_id;
 983         if (nested_function)
 984                 ld_id = id_unique("inner.%u");
 985         else
 986                 ld_id = create_ld_ident(entity);
 987         set_entity_ld_ident(irentity, ld_id);
 988
 989         handle_decl_modifiers(irentity, entity);
 990
 991         if (! nested_function) {
 992                 /* static inline             => local
 993                  * extern inline             => local
 994                  * inline without definition => local
 995                  * inline with definition    => external_visible */
 996                 storage_class_tag_t const storage_class
 997                         = (storage_class_tag_t) entity->declaration.storage_class;
 998                 bool                const is_inline     = entity->function.is_inline;
 999
1000                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1001                     set_entity_visibility(irentity, ir_visibility_default);
1002                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1003                            (is_inline && has_body)) {
1004                     set_entity_visibility(irentity, ir_visibility_local);
1005                 } else if (has_body) {
1006                     set_entity_visibility(irentity, ir_visibility_default);
1007                 } else {
1008                     set_entity_visibility(irentity, ir_visibility_external);
1009                 }
1010         } else {
1011                 /* nested functions are always local */
1012                 set_entity_visibility(irentity, ir_visibility_local);
1013         }
1014
1015         /* We should check for file scope here, but as long as we compile C only
1016            this is not needed. */
1017         if (! firm_opt.freestanding && !has_body) {
1018                 /* check for a known runtime function */
1019                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1020                         if (id != rts_idents[i])
1021                                 continue;
1022
1023                         /* ignore those rts functions not necessary needed for current mode */
1024                         if ((c_mode & rts_data[i].flags) == 0)
1025                                 continue;
1026                         assert(rts_entities[rts_data[i].id] == NULL);
1027                         rts_entities[rts_data[i].id] = irentity;
1028                 }
1029         }
1030
1031         entitymap_insert(&entitymap, symbol, irentity);
1032
1033 entity_created:
1034         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1035         entity->function.irentity = irentity;
1036
1037         return irentity;
1038 }
1039
1040 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1041 {
1042         ir_mode *value_mode = get_irn_mode(value);
1043
1044         if (value_mode == dest_mode || is_Bad(value))
1045                 return value;
1046
1047         if (dest_mode == mode_b) {
1048                 ir_node *zero = new_Const(get_mode_null(value_mode));
1049                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1050                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1051                 return proj;
1052         }
1053
1054         return new_d_Conv(dbgi, value, dest_mode);
1055 }
1056
1057 /**
1058  * Creates a Const node representing a constant.
1059  */
1060 static ir_node *const_to_firm(const const_expression_t *cnst)
1061 {
1062         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1063         type_t   *type = skip_typeref(cnst->base.type);
1064         ir_mode  *mode = get_ir_mode_storage(type);
1065
1066         char    buf[128];
1067         tarval *tv;
1068         size_t  len;
1069         if (mode_is_float(mode)) {
1070                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1071         } else {
1072                 if (mode_is_signed(mode)) {
1073                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1074                 } else {
1075                         len = snprintf(buf, sizeof(buf), "%llu",
1076                                        (unsigned long long) cnst->v.int_value);
1077                 }
1078                 tv = new_tarval_from_str(buf, len, mode);
1079         }
1080
1081         ir_node *res        = new_d_Const(dbgi, tv);
1082         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1083         return create_conv(dbgi, res, mode_arith);
1084 }
1085
1086 /**
1087  * Creates a Const node representing a character constant.
1088  */
1089 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1090 {
1091         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1092         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1093
1094         long long int v;
1095         size_t const  size = cnst->v.character.size;
1096         if (size == 1 && char_is_signed) {
1097                 v = (signed char)cnst->v.character.begin[0];
1098         } else {
1099                 v = 0;
1100                 for (size_t i = 0; i < size; ++i) {
1101                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1102                 }
1103         }
1104         char    buf[128];
1105         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1106         tarval *tv = new_tarval_from_str(buf, len, mode);
1107
1108         return new_d_Const(dbgi, tv);
1109 }
1110
1111 /**
1112  * Creates a Const node representing a wide character constant.
1113  */
1114 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1115 {
1116         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1117         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1118
1119         long long int v = cnst->v.wide_character.begin[0];
1120
1121         char    buf[128];
1122         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1123         tarval *tv = new_tarval_from_str(buf, len, mode);
1124
1125         return new_d_Const(dbgi, tv);
1126 }
1127
1128 /*
1129  * Allocate an area of size bytes aligned at alignment
1130  * at a frame type.
1131  */
1132 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1133 {
1134         static unsigned area_cnt = 0;
1135         char buf[32];
1136
1137         ir_type *tp = new_type_array(1, ir_type_char);
1138         set_array_bounds_int(tp, 0, 0, size);
1139         set_type_alignment_bytes(tp, alignment);
1140
1141         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1142         ident *name = new_id_from_str(buf);
1143         ir_entity *area = new_entity(frame_type, name, tp);
1144
1145         /* mark this entity as compiler generated */
1146         set_entity_compiler_generated(area, 1);
1147         return area;
1148 }
1149
1150 /**
1151  * Return a node representing a trampoline region
1152  * for a given function entity.
1153  *
1154  * @param dbgi    debug info
1155  * @param entity  the function entity
1156  */
1157 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1158 {
1159         ir_entity *region = NULL;
1160         int        i;
1161
1162         if (current_trampolines != NULL) {
1163                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1164                         if (current_trampolines[i].function == entity) {
1165                                 region = current_trampolines[i].region;
1166                                 break;
1167                         }
1168                 }
1169         } else {
1170                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1171         }
1172         ir_graph *irg = current_ir_graph;
1173         if (region == NULL) {
1174                 /* create a new region */
1175                 ir_type           *frame_tp = get_irg_frame_type(irg);
1176                 trampoline_region  reg;
1177                 reg.function = entity;
1178
1179                 reg.region   = alloc_trampoline(frame_tp,
1180                                                 be_params->trampoline_size,
1181                                                 be_params->trampoline_align);
1182                 ARR_APP1(trampoline_region, current_trampolines, reg);
1183                 region = reg.region;
1184         }
1185         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1186                                region);
1187 }
1188
1189
1190 /**
1191  * Creates a SymConst for a given entity.
1192  *
1193  * @param dbgi    debug info
1194  * @param mode    the (reference) mode for the SymConst
1195  * @param entity  the entity
1196  */
1197 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1198                                 ir_entity *entity)
1199 {
1200         assert(entity != NULL);
1201         union symconst_symbol sym;
1202         sym.entity_p = entity;
1203         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1204 }
1205
1206 /**
1207  * Creates a trampoline for a function represented by an entity.
1208  *
1209  * @param dbgi    debug info
1210  * @param mode    the (reference) mode for the function address
1211  * @param entity  the function entity
1212  */
1213 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1214                                   ir_entity *entity)
1215 {
1216         assert(entity != NULL);
1217         ir_node *in[3];
1218         in[0] = get_trampoline_region(dbgi, entity);
1219         in[1] = create_symconst(dbgi, mode, entity);
1220         in[2] = get_irg_frame(current_ir_graph);
1221
1222         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1223         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1224         return new_Proj(irn, mode, pn_Builtin_1_result);
1225 }
1226
1227 /**
1228  * Creates a SymConst node representing a string constant.
1229  *
1230  * @param src_pos    the source position of the string constant
1231  * @param id_prefix  a prefix for the name of the generated string constant
1232  * @param value      the value of the string constant
1233  */
1234 static ir_node *string_to_firm(const source_position_t *const src_pos,
1235                                const char *const id_prefix,
1236                                const string_t *const value)
1237 {
1238         ir_type  *const global_type = get_glob_type();
1239         dbg_info *const dbgi        = get_dbg_info(src_pos);
1240         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1241
1242         ident     *const id     = id_unique(id_prefix);
1243         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1244         set_entity_ld_ident(entity, id);
1245         set_entity_visibility(entity, ir_visibility_local);
1246         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1247
1248         ir_type *const elem_type = ir_type_const_char;
1249         ir_mode *const mode      = get_type_mode(elem_type);
1250
1251         const char* const string = value->begin;
1252         const size_t      slen   = value->size;
1253
1254         set_array_lower_bound_int(type, 0, 0);
1255         set_array_upper_bound_int(type, 0, slen);
1256         set_type_size_bytes(type, slen);
1257         set_type_state(type, layout_fixed);
1258
1259         ir_initializer_t *initializer = create_initializer_compound(slen);
1260         for (size_t i = 0; i < slen; ++i) {
1261                 tarval           *tv  = new_tarval_from_long(string[i], mode);
1262                 ir_initializer_t *val = create_initializer_tarval(tv);
1263                 set_initializer_compound_value(initializer, i, val);
1264         }
1265         set_entity_initializer(entity, initializer);
1266
1267         return create_symconst(dbgi, mode_P_data, entity);
1268 }
1269
1270 /**
1271  * Creates a SymConst node representing a string literal.
1272  *
1273  * @param literal   the string literal
1274  */
1275 static ir_node *string_literal_to_firm(
1276                 const string_literal_expression_t* literal)
1277 {
1278         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1279                               &literal->value);
1280 }
1281
1282 /**
1283  * Creates a SymConst node representing a wide string literal.
1284  *
1285  * @param literal   the wide string literal
1286  */
1287 static ir_node *wide_string_literal_to_firm(
1288         const wide_string_literal_expression_t* const literal)
1289 {
1290         ir_type *const global_type = get_glob_type();
1291         ir_type *const elem_type   = ir_type_wchar_t;
1292         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1293         ir_type *const type        = new_type_array(1, elem_type);
1294
1295         ident     *const id     = id_unique("Lstr.%u");
1296         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1297         set_entity_ld_ident(entity, id);
1298         set_entity_visibility(entity, ir_visibility_local);
1299         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1300
1301         ir_mode *const mode      = get_type_mode(elem_type);
1302
1303         const wchar_rep_t *const string = literal->value.begin;
1304         const size_t             slen   = literal->value.size;
1305
1306         set_array_lower_bound_int(type, 0, 0);
1307         set_array_upper_bound_int(type, 0, slen);
1308         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1309         set_type_state(type, layout_fixed);
1310
1311         ir_initializer_t *initializer = create_initializer_compound(slen);
1312         for (size_t i = 0; i < slen; ++i) {
1313                 tarval           *tv  = new_tarval_from_long(string[i], mode);
1314                 ir_initializer_t *val = create_initializer_tarval(tv);
1315                 set_initializer_compound_value(initializer, i, val);
1316         }
1317         set_entity_initializer(entity, initializer);
1318
1319         return create_symconst(dbgi, mode_P_data, entity);
1320 }
1321
1322 /**
1323  * Dereference an address.
1324  *
1325  * @param dbgi  debug info
1326  * @param type  the type of the dereferenced result (the points_to type)
1327  * @param addr  the address to dereference
1328  */
1329 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1330                                       ir_node *const addr)
1331 {
1332         ir_type *irtype = get_ir_type(type);
1333         if (is_compound_type(irtype)
1334                         || is_Method_type(irtype)
1335                         || is_Array_type(irtype)) {
1336                 return addr;
1337         }
1338
1339         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1340                                   ? cons_volatile : cons_none;
1341         ir_mode *const mode     = get_type_mode(irtype);
1342         ir_node *const memory   = get_store();
1343         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1344         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1345         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1346
1347         set_store(load_mem);
1348
1349         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1350         return create_conv(dbgi, load_res, mode_arithmetic);
1351 }
1352
1353 /**
1354  * Creates a strict Conv (to the node's mode) if necessary.
1355  *
1356  * @param dbgi  debug info
1357  * @param node  the node to strict conv
1358  */
1359 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1360 {
1361         ir_mode *mode = get_irn_mode(node);
1362
1363         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1364                 return node;
1365         if (!mode_is_float(mode))
1366                 return node;
1367
1368         /* check if there is already a Conv */
1369         if (is_Conv(node)) {
1370                 /* convert it into a strict Conv */
1371                 set_Conv_strict(node, 1);
1372                 return node;
1373         }
1374
1375         /* otherwise create a new one */
1376         return new_d_strictConv(dbgi, node, mode);
1377 }
1378
1379 /**
1380  * Returns the address of a global variable.
1381  *
1382  * @param dbgi      debug info
1383  * @param variable  the variable
1384  */
1385 static ir_node *get_global_var_address(dbg_info *const dbgi,
1386                                        const variable_t *const variable)
1387 {
1388         ir_entity *const irentity = variable->v.entity;
1389         if (variable->thread_local) {
1390                 ir_node *const no_mem = new_NoMem();
1391                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1392                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1393         } else {
1394                 return create_symconst(dbgi, mode_P_data, irentity);
1395         }
1396 }
1397
1398 /**
1399  * Returns the correct base address depending on whether it is a parameter or a
1400  * normal local variable.
1401  */
1402 static ir_node *get_local_frame(ir_entity *const ent)
1403 {
1404         ir_graph      *const irg   = current_ir_graph;
1405         const ir_type *const owner = get_entity_owner(ent);
1406         if (owner == current_outer_frame || owner == current_outer_value_type) {
1407                 assert(current_static_link != NULL);
1408                 return current_static_link;
1409         } else {
1410                 return get_irg_frame(irg);
1411         }
1412 }
1413
1414 /**
1415  * Keep all memory edges of the given block.
1416  */
1417 static void keep_all_memory(ir_node *block)
1418 {
1419         ir_node *old = get_cur_block();
1420
1421         set_cur_block(block);
1422         keep_alive(get_store());
1423         /* TODO: keep all memory edges from restricted pointers */
1424         set_cur_block(old);
1425 }
1426
1427 static ir_node *reference_expression_enum_value_to_firm(
1428                 const reference_expression_t *ref)
1429 {
1430         entity_t *entity = ref->entity;
1431         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1432         /* make sure the type is constructed */
1433         (void) get_ir_type(type);
1434
1435         return new_Const(entity->enum_value.tv);
1436 }
1437
1438 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1439 {
1440         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1441         entity_t *entity = ref->entity;
1442         assert(is_declaration(entity));
1443         type_t   *type   = skip_typeref(entity->declaration.type);
1444
1445         /* make sure the type is constructed */
1446         (void) get_ir_type(type);
1447
1448         /* for gcc compatibility we have to produce (dummy) addresses for some
1449          * builtins */
1450         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1451                 if (warning.other) {
1452                         warningf(&ref->base.source_position,
1453                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1454                 }
1455
1456                 /* simply create a NULL pointer */
1457                 ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1458                 ir_node  *res  = new_Const_long(mode, 0);
1459
1460                 return res;
1461         }
1462
1463         switch ((declaration_kind_t) entity->declaration.kind) {
1464         case DECLARATION_KIND_UNKNOWN:
1465                 break;
1466
1467         case DECLARATION_KIND_LOCAL_VARIABLE: {
1468                 ir_mode *const mode  = get_ir_mode_storage(type);
1469                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1470                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1471         }
1472         case DECLARATION_KIND_PARAMETER: {
1473                 ir_mode *const mode  = get_ir_mode_storage(type);
1474                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1475                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1476         }
1477         case DECLARATION_KIND_FUNCTION: {
1478                 ir_mode *const mode = get_ir_mode_storage(type);
1479                 return create_symconst(dbgi, mode, entity->function.irentity);
1480         }
1481         case DECLARATION_KIND_INNER_FUNCTION: {
1482                 ir_mode *const mode = get_ir_mode_storage(type);
1483                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1484                         /* inner function not using the closure */
1485                         return create_symconst(dbgi, mode, entity->function.irentity);
1486                 } else {
1487                         /* need trampoline here */
1488                         return create_trampoline(dbgi, mode, entity->function.irentity);
1489                 }
1490         }
1491         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1492                 const variable_t *variable = &entity->variable;
1493                 ir_node *const addr = get_global_var_address(dbgi, variable);
1494                 return deref_address(dbgi, variable->base.type, addr);
1495         }
1496
1497         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1498                 ir_entity *irentity = entity->variable.v.entity;
1499                 ir_node   *frame    = get_local_frame(irentity);
1500                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1501                 return deref_address(dbgi, entity->declaration.type, sel);
1502         }
1503         case DECLARATION_KIND_PARAMETER_ENTITY: {
1504                 ir_entity *irentity = entity->parameter.v.entity;
1505                 ir_node   *frame    = get_local_frame(irentity);
1506                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1507                 return deref_address(dbgi, entity->declaration.type, sel);
1508         }
1509
1510         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1511                 return entity->variable.v.vla_base;
1512
1513         case DECLARATION_KIND_COMPOUND_MEMBER:
1514                 panic("not implemented reference type");
1515         }
1516
1517         panic("reference to declaration with unknown type found");
1518 }
1519
1520 static ir_node *reference_addr(const reference_expression_t *ref)
1521 {
1522         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1523         entity_t *entity = ref->entity;
1524         assert(is_declaration(entity));
1525
1526         switch((declaration_kind_t) entity->declaration.kind) {
1527         case DECLARATION_KIND_UNKNOWN:
1528                 break;
1529         case DECLARATION_KIND_PARAMETER:
1530         case DECLARATION_KIND_LOCAL_VARIABLE:
1531                 /* you can store to a local variable (so we don't panic but return NULL
1532                  * as an indicator for no real address) */
1533                 return NULL;
1534         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1535                 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1536                 return addr;
1537         }
1538         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1539                 ir_entity *irentity = entity->variable.v.entity;
1540                 ir_node   *frame    = get_local_frame(irentity);
1541                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1542
1543                 return sel;
1544         }
1545         case DECLARATION_KIND_PARAMETER_ENTITY: {
1546                 ir_entity *irentity = entity->parameter.v.entity;
1547                 ir_node   *frame    = get_local_frame(irentity);
1548                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1549
1550                 return sel;
1551         }
1552
1553         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1554                 return entity->variable.v.vla_base;
1555
1556         case DECLARATION_KIND_FUNCTION: {
1557                 type_t  *const type = skip_typeref(entity->declaration.type);
1558                 ir_mode *const mode = get_ir_mode_storage(type);
1559                 return create_symconst(dbgi, mode, entity->function.irentity);
1560         }
1561
1562         case DECLARATION_KIND_INNER_FUNCTION: {
1563                 type_t  *const type = skip_typeref(entity->declaration.type);
1564                 ir_mode *const mode = get_ir_mode_storage(type);
1565                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1566                         /* inner function not using the closure */
1567                         return create_symconst(dbgi, mode, entity->function.irentity);
1568                 } else {
1569                         /* need trampoline here */
1570                         return create_trampoline(dbgi, mode, entity->function.irentity);
1571                 }
1572         }
1573
1574         case DECLARATION_KIND_COMPOUND_MEMBER:
1575                 panic("not implemented reference type");
1576         }
1577
1578         panic("reference to declaration with unknown type found");
1579 }
1580
1581 /**
1582  * Generate an unary builtin.
1583  *
1584  * @param kind           the builtin kind to generate
1585  * @param op             the operand
1586  * @param function_type  the function type for the GNU builtin routine
1587  * @param db             debug info
1588  */
1589 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1590 {
1591         ir_node *in[1];
1592         in[0] = expression_to_firm(op);
1593
1594         ir_type *tp  = get_ir_type(function_type);
1595         ir_type *res = get_method_res_type(tp, 0);
1596         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1597         set_irn_pinned(irn, op_pin_state_floats);
1598         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1599 }
1600
1601 /**
1602  * Generate a pinned unary builtin.
1603  *
1604  * @param kind           the builtin kind to generate
1605  * @param op             the operand
1606  * @param function_type  the function type for the GNU builtin routine
1607  * @param db             debug info
1608  */
1609 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1610 {
1611         ir_node *in[1];
1612         in[0] = expression_to_firm(op);
1613
1614         ir_type *tp  = get_ir_type(function_type);
1615         ir_type *res = get_method_res_type(tp, 0);
1616         ir_node *mem = get_store();
1617         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1618         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1619         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1620 }
1621
1622
1623 /**
1624  * Generate an binary-void-return builtin.
1625  *
1626  * @param kind           the builtin kind to generate
1627  * @param op1            the first operand
1628  * @param op2            the second operand
1629  * @param function_type  the function type for the GNU builtin routine
1630  * @param db             debug info
1631  */
1632 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1, expression_t *op2,
1633                                                                            type_t *function_type, dbg_info *db)
1634 {
1635         ir_node *in[2];
1636         in[0] = expression_to_firm(op1);
1637         in[1] = expression_to_firm(op2);
1638
1639         ir_type *tp  = get_ir_type(function_type);
1640         ir_node *mem = get_store();
1641         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1642         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1643         return NULL;
1644 }
1645
1646 /**
1647  * Transform calls to builtin functions.
1648  */
1649 static ir_node *process_builtin_call(const call_expression_t *call)
1650 {
1651         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1652
1653         assert(call->function->kind == EXPR_REFERENCE);
1654         reference_expression_t *builtin = &call->function->reference;
1655
1656         type_t *type = skip_typeref(builtin->base.type);
1657         assert(is_type_pointer(type));
1658
1659         type_t   *function_type = skip_typeref(type->pointer.points_to);
1660
1661         switch (builtin->entity->function.btk) {
1662         case bk_gnu_builtin_alloca: {
1663                 if (call->arguments == NULL || call->arguments->next != NULL) {
1664                         panic("invalid number of parameters on __builtin_alloca");
1665                 }
1666                 expression_t *argument = call->arguments->expression;
1667                 ir_node      *size     = expression_to_firm(argument);
1668
1669                 ir_node *store  = get_store();
1670                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1671                                               stack_alloc);
1672                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1673                 set_store(proj_m);
1674                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1675
1676                 return res;
1677         }
1678
1679         case bk_gnu_builtin_huge_val:
1680         case bk_gnu_builtin_huge_valf:
1681         case bk_gnu_builtin_huge_vall:
1682         case bk_gnu_builtin_inf:
1683         case bk_gnu_builtin_inff:
1684         case bk_gnu_builtin_infl: {
1685                 type_t  *type = function_type->function.return_type;
1686                 ir_mode *mode = get_ir_mode_arithmetic(type);
1687                 tarval  *tv   = get_mode_infinite(mode);
1688                 ir_node *res  = new_d_Const(dbgi, tv);
1689                 return   res;
1690         }
1691         case bk_gnu_builtin_nan:
1692         case bk_gnu_builtin_nanf:
1693         case bk_gnu_builtin_nanl: {
1694                 /* Ignore string for now... */
1695                 assert(is_type_function(function_type));
1696                 type_t  *type = function_type->function.return_type;
1697                 ir_mode *mode = get_ir_mode_arithmetic(type);
1698                 tarval  *tv   = get_mode_NAN(mode);
1699                 ir_node *res  = new_d_Const(dbgi, tv);
1700                 return res;
1701         }
1702         case bk_gnu_builtin_expect: {
1703                 expression_t *argument = call->arguments->expression;
1704                 return _expression_to_firm(argument);
1705         }
1706         case bk_gnu_builtin_va_end:
1707                 /* evaluate the argument of va_end for its side effects */
1708                 _expression_to_firm(call->arguments->expression);
1709                 return NULL;
1710         case bk_gnu_builtin_frame_address: {
1711                 expression_t *const expression = call->arguments->expression;
1712                 bool val = fold_constant_to_bool(expression);
1713                 if (!val) {
1714                         /* the nice case */
1715                         return get_irg_frame(current_ir_graph);
1716                 } else {
1717                         /* get the argument */
1718                         ir_node *in[2];
1719
1720                         in[0] = expression_to_firm(expression);
1721                         in[1] = get_irg_frame(current_ir_graph);
1722                         ir_type *tp  = get_ir_type(function_type);
1723                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1724                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1725                 }
1726         }
1727         case bk_gnu_builtin_return_address: {
1728
1729                 expression_t *const expression = call->arguments->expression;
1730                 ir_node *in[2];
1731
1732                 in[0] = expression_to_firm(expression);
1733                 in[1] = get_irg_frame(current_ir_graph);
1734                 ir_type *tp  = get_ir_type(function_type);
1735                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1736                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1737         }
1738         case bk_gnu_builtin_ffs:
1739                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1740         case bk_gnu_builtin_clz:
1741                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1742         case bk_gnu_builtin_ctz:
1743                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1744         case bk_gnu_builtin_popcount:
1745         case bk_ms__popcount:
1746                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1747         case bk_gnu_builtin_parity:
1748                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1749         case bk_gnu_builtin_prefetch: {
1750                 call_argument_t *const args = call->arguments;
1751                 expression_t *const addr    = args->expression;
1752                 ir_node *in[3];
1753
1754                 in[0] = _expression_to_firm(addr);
1755                 if (args->next != NULL) {
1756                         expression_t *const rw = args->next->expression;
1757
1758                         in[1] = _expression_to_firm(rw);
1759
1760                         if (args->next->next != NULL) {
1761                                 expression_t *const locality = args->next->next->expression;
1762
1763                                 in[2] = expression_to_firm(locality);
1764                         } else {
1765                                 in[2] = new_Const_long(mode_int, 3);
1766                         }
1767                 } else {
1768                         in[1] = new_Const_long(mode_int, 0);
1769                         in[2] = new_Const_long(mode_int, 3);
1770                 }
1771                 ir_type *tp  = get_ir_type(function_type);
1772                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1773                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1774                 return NULL;
1775         }
1776         case bk_gnu_builtin_trap:
1777         case bk_ms__ud2:
1778         {
1779                 ir_type *tp  = get_ir_type(function_type);
1780                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1781                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1782                 return NULL;
1783         }
1784         case bk_ms__debugbreak: {
1785                 ir_type *tp  = get_ir_type(function_type);
1786                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1787                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1788                 return NULL;
1789         }
1790         case bk_ms_ReturnAddress: {
1791                 ir_node *in[2];
1792
1793                 in[0] = new_Const_long(mode_int, 0);
1794                 in[1] = get_irg_frame(current_ir_graph);
1795                 ir_type *tp  = get_ir_type(function_type);
1796                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1797                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1798         }
1799         case bk_ms_rotl:
1800         case bk_ms_rotl64: {
1801                 ir_node *val  = expression_to_firm(call->arguments->expression);
1802                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1803                 ir_mode *mode = get_irn_mode(val);
1804                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1805         }
1806         case bk_ms_rotr:
1807         case bk_ms_rotr64: {
1808                 ir_node *val  = expression_to_firm(call->arguments->expression);
1809                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1810                 ir_mode *mode = get_irn_mode(val);
1811                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1812                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1813                 return new_d_Rotl(dbgi, val, sub, mode);
1814         }
1815         case bk_ms_byteswap_ushort:
1816         case bk_ms_byteswap_ulong:
1817         case bk_ms_byteswap_uint64:
1818                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1819         case bk_ms__inbyte:
1820         case bk_ms__inword:
1821         case bk_ms__indword:
1822                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1823         case bk_ms__outbyte:
1824         case bk_ms__outword:
1825         case bk_ms__outdword:
1826                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1827                         call->arguments->next->expression, function_type, dbgi);
1828         default:
1829                 panic("unsupported builtin found");
1830         }
1831 }
1832
1833 /**
1834  * Transform a call expression.
1835  * Handles some special cases, like alloca() calls, which must be resolved
1836  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1837  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1838  * handled right...
1839  */
1840 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1841 {
1842         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1843         assert(get_cur_block() != NULL);
1844
1845         expression_t *function = call->function;
1846         if (function->kind == EXPR_REFERENCE) {
1847                 const reference_expression_t *ref    = &function->reference;
1848                 entity_t                     *entity = ref->entity;
1849
1850                 if (entity->kind == ENTITY_FUNCTION) {
1851                         if (entity->function.btk != bk_none) {
1852                                 return process_builtin_call(call);
1853                         }
1854
1855                         ir_entity *irentity = entity->function.irentity;
1856                         if (irentity == NULL)
1857                                 irentity = get_function_entity(entity, NULL);
1858
1859                         if (irentity == rts_entities[rts_alloca]) {
1860                                 /* handle alloca() call */
1861                                 expression_t *argument = call->arguments->expression;
1862                                 ir_node      *size     = expression_to_firm(argument);
1863                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1864
1865                                 size = create_conv(dbgi, size, mode);
1866
1867                                 ir_node  *store  = get_store();
1868                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1869                                                                firm_unknown_type, stack_alloc);
1870                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1871                                 set_store(proj_m);
1872                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1873
1874                                 return res;
1875                         }
1876                 }
1877         }
1878         ir_node *callee = expression_to_firm(function);
1879
1880         type_t *type = skip_typeref(function->base.type);
1881         assert(is_type_pointer(type));
1882         pointer_type_t *pointer_type = &type->pointer;
1883         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1884         assert(is_type_function(points_to));
1885         function_type_t *function_type = &points_to->function;
1886
1887         int      n_parameters = 0;
1888         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1889         ir_type *new_method_type = NULL;
1890         if (function_type->variadic || function_type->unspecified_parameters) {
1891                 const call_argument_t *argument = call->arguments;
1892                 for ( ; argument != NULL; argument = argument->next) {
1893                         ++n_parameters;
1894                 }
1895
1896                 /* we need to construct a new method type matching the call
1897                  * arguments... */
1898                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1899                 int n_res       = get_method_n_ress(ir_method_type);
1900                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1901                 set_method_calling_convention(new_method_type,
1902                                get_method_calling_convention(ir_method_type));
1903                 set_method_additional_properties(new_method_type,
1904                                get_method_additional_properties(ir_method_type));
1905                 set_method_variadicity(new_method_type,
1906                                        get_method_variadicity(ir_method_type));
1907
1908                 for (int i = 0; i < n_res; ++i) {
1909                         set_method_res_type(new_method_type, i,
1910                                             get_method_res_type(ir_method_type, i));
1911                 }
1912                 argument = call->arguments;
1913                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1914                         expression_t *expression = argument->expression;
1915                         ir_type      *irtype     = get_ir_type(expression->base.type);
1916                         set_method_param_type(new_method_type, i, irtype);
1917                 }
1918                 ir_method_type = new_method_type;
1919         } else {
1920                 n_parameters = get_method_n_params(ir_method_type);
1921         }
1922
1923         ir_node *in[n_parameters];
1924
1925         const call_argument_t *argument = call->arguments;
1926         for (int n = 0; n < n_parameters; ++n) {
1927                 expression_t *expression = argument->expression;
1928                 ir_node      *arg_node   = expression_to_firm(expression);
1929
1930                 type_t  *type = skip_typeref(expression->base.type);
1931                 if (!is_type_compound(type)) {
1932                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1933                         arg_node      = create_conv(dbgi, arg_node, mode);
1934                         arg_node      = do_strict_conv(dbgi, arg_node);
1935                 }
1936
1937                 in[n] = arg_node;
1938
1939                 argument = argument->next;
1940         }
1941
1942         ir_node  *store = get_store();
1943         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1944                                      ir_method_type);
1945         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M);
1946         set_store(mem);
1947
1948         type_t  *return_type = skip_typeref(function_type->return_type);
1949         ir_node *result      = NULL;
1950
1951         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1952                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1953
1954                 if (is_type_scalar(return_type)) {
1955                         ir_mode *mode       = get_ir_mode_storage(return_type);
1956                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1957                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1958                         result              = create_conv(NULL, result, mode_arith);
1959                 } else {
1960                         ir_mode *mode = mode_P_data;
1961                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1962                 }
1963         }
1964
1965         if (function->kind == EXPR_REFERENCE &&
1966             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1967                 /* A dead end:  Keep the Call and the Block.  Also place all further
1968                  * nodes into a new and unreachable block. */
1969                 keep_alive(node);
1970                 keep_alive(get_cur_block());
1971                 new_Block(0, NULL);
1972         }
1973
1974         return result;
1975 }
1976
1977 static void statement_to_firm(statement_t *statement);
1978 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1979
1980 static ir_node *expression_to_addr(const expression_t *expression);
1981 static ir_node *create_condition_evaluation(const expression_t *expression,
1982                                             ir_node *true_block,
1983                                             ir_node *false_block);
1984
1985 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1986                          ir_node *value)
1987 {
1988         if (!is_type_compound(type)) {
1989                 ir_mode *mode = get_ir_mode_storage(type);
1990                 value         = create_conv(dbgi, value, mode);
1991                 value         = do_strict_conv(dbgi, value);
1992         }
1993
1994         ir_node *memory = get_store();
1995
1996         if (is_type_scalar(type)) {
1997                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1998                                       ? cons_volatile : cons_none;
1999                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2000                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2001                 set_store(store_mem);
2002         } else {
2003                 ir_type *irtype    = get_ir_type(type);
2004                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2005                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
2006                 set_store(copyb_mem);
2007         }
2008 }
2009
2010 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2011 {
2012         tarval *all_one   = get_mode_all_one(mode);
2013         int     mode_size = get_mode_size_bits(mode);
2014
2015         assert(offset >= 0);
2016         assert(size   >= 0);
2017         assert(offset + size <= mode_size);
2018         if (size == mode_size) {
2019                 return all_one;
2020         }
2021
2022         long    shiftr    = get_mode_size_bits(mode) - size;
2023         long    shiftl    = offset;
2024         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2025         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2026         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2027         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2028
2029         return mask1;
2030 }
2031
2032 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2033                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2034 {
2035         ir_type *entity_type = get_entity_type(entity);
2036         ir_type *base_type   = get_primitive_base_type(entity_type);
2037         assert(base_type != NULL);
2038         ir_mode *mode        = get_type_mode(base_type);
2039
2040         value = create_conv(dbgi, value, mode);
2041
2042         /* kill upper bits of value and shift to right position */
2043         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2044         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2045
2046         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
2047         ir_node *mask_node       = new_d_Const(dbgi, mask);
2048         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2049         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2050         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
2051         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2052
2053         /* load current value */
2054         ir_node  *mem             = get_store();
2055         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
2056                                         set_volatile ? cons_volatile : cons_none);
2057         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2058         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2059         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2060         tarval   *inv_mask        = tarval_not(shift_mask);
2061         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2062         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2063
2064         /* construct new value and store */
2065         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2066         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2067                                          set_volatile ? cons_volatile : cons_none);
2068         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2069         set_store(store_mem);
2070
2071         return value_masked;
2072 }
2073
2074 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2075                 ir_node *addr)
2076 {
2077         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2078         type_t   *type     = expression->base.type;
2079         ir_mode  *mode     = get_ir_mode_storage(type);
2080         ir_node  *mem      = get_store();
2081         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2082         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2083         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2084
2085         load_res           = create_conv(dbgi, load_res, mode_int);
2086
2087         set_store(load_mem);
2088
2089         /* kill upper bits */
2090         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2091         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2092         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2093         ir_type   *entity_type  = get_entity_type(entity);
2094         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2095         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2096         assert(shift_bitsl >= 0);
2097         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2098         ir_node   *countl       = new_d_Const(dbgi, tvl);
2099         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2100
2101         long       shift_bitsr  = bitoffset + shift_bitsl;
2102         assert(shift_bitsr <= (long) machine_size);
2103         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2104         ir_node   *countr       = new_d_Const(dbgi, tvr);
2105         ir_node   *shiftr;
2106         if (mode_is_signed(mode)) {
2107                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2108         } else {
2109                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2110         }
2111
2112         return create_conv(dbgi, shiftr, mode);
2113 }
2114
2115 /* make sure the selected compound type is constructed */
2116 static void construct_select_compound(const select_expression_t *expression)
2117 {
2118         type_t *type = skip_typeref(expression->compound->base.type);
2119         if (is_type_pointer(type)) {
2120                 type = type->pointer.points_to;
2121         }
2122         (void) get_ir_type(type);
2123 }
2124
2125 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2126                                               ir_node *value, ir_node *addr)
2127 {
2128         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2129         type_t   *type = skip_typeref(expression->base.type);
2130
2131         if (!is_type_compound(type)) {
2132                 ir_mode  *mode = get_ir_mode_storage(type);
2133                 value          = create_conv(dbgi, value, mode);
2134                 value          = do_strict_conv(dbgi, value);
2135         }
2136
2137         if (expression->kind == EXPR_REFERENCE) {
2138                 const reference_expression_t *ref = &expression->reference;
2139
2140                 entity_t *entity = ref->entity;
2141                 assert(is_declaration(entity));
2142                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2143                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2144                         set_value(entity->variable.v.value_number, value);
2145                         return value;
2146                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2147                         set_value(entity->parameter.v.value_number, value);
2148                         return value;
2149                 }
2150         }
2151
2152         if (addr == NULL)
2153                 addr = expression_to_addr(expression);
2154         assert(addr != NULL);
2155
2156         if (expression->kind == EXPR_SELECT) {
2157                 const select_expression_t *select = &expression->select;
2158
2159                 construct_select_compound(select);
2160
2161                 entity_t *entity = select->compound_entry;
2162                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2163                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2164                         ir_entity *irentity = entity->compound_member.entity;
2165                         bool       set_volatile
2166                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2167                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2168                                                        set_volatile);
2169                         return value;
2170                 }
2171         }
2172
2173         assign_value(dbgi, addr, type, value);
2174         return value;
2175 }
2176
2177 static void set_value_for_expression(const expression_t *expression,
2178                                      ir_node *value)
2179 {
2180         set_value_for_expression_addr(expression, value, NULL);
2181 }
2182
2183 static ir_node *get_value_from_lvalue(const expression_t *expression,
2184                                       ir_node *addr)
2185 {
2186         if (expression->kind == EXPR_REFERENCE) {
2187                 const reference_expression_t *ref = &expression->reference;
2188
2189                 entity_t *entity = ref->entity;
2190                 assert(entity->kind == ENTITY_VARIABLE
2191                                 || entity->kind == ENTITY_PARAMETER);
2192                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2193                 int value_number;
2194                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2195                         value_number = entity->variable.v.value_number;
2196                         assert(addr == NULL);
2197                         type_t  *type = skip_typeref(expression->base.type);
2198                         ir_mode *mode = get_ir_mode_storage(type);
2199                         ir_node *res  = get_value(value_number, mode);
2200                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2201                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2202                         value_number = entity->parameter.v.value_number;
2203                         assert(addr == NULL);
2204                         type_t  *type = skip_typeref(expression->base.type);
2205                         ir_mode *mode = get_ir_mode_storage(type);
2206                         ir_node *res  = get_value(value_number, mode);
2207                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2208                 }
2209         }
2210
2211         assert(addr != NULL);
2212         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2213
2214         ir_node *value;
2215         if (expression->kind == EXPR_SELECT &&
2216             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2217             construct_select_compound(&expression->select);
2218                 value = bitfield_extract_to_firm(&expression->select, addr);
2219         } else {
2220                 value = deref_address(dbgi, expression->base.type, addr);
2221         }
2222
2223         return value;
2224 }
2225
2226
2227 static ir_node *create_incdec(const unary_expression_t *expression)
2228 {
2229         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2230         const expression_t *value_expr = expression->value;
2231         ir_node            *addr       = expression_to_addr(value_expr);
2232         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2233
2234         type_t  *type = skip_typeref(expression->base.type);
2235         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2236
2237         ir_node *offset;
2238         if (is_type_pointer(type)) {
2239                 pointer_type_t *pointer_type = &type->pointer;
2240                 offset = get_type_size_node(pointer_type->points_to);
2241         } else {
2242                 assert(is_type_arithmetic(type));
2243                 offset = new_Const(get_mode_one(mode));
2244         }
2245
2246         ir_node *result;
2247         ir_node *store_value;
2248         switch(expression->base.kind) {
2249         case EXPR_UNARY_POSTFIX_INCREMENT:
2250                 result      = value;
2251                 store_value = new_d_Add(dbgi, value, offset, mode);
2252                 break;
2253         case EXPR_UNARY_POSTFIX_DECREMENT:
2254                 result      = value;
2255                 store_value = new_d_Sub(dbgi, value, offset, mode);
2256                 break;
2257         case EXPR_UNARY_PREFIX_INCREMENT:
2258                 result      = new_d_Add(dbgi, value, offset, mode);
2259                 store_value = result;
2260                 break;
2261         case EXPR_UNARY_PREFIX_DECREMENT:
2262                 result      = new_d_Sub(dbgi, value, offset, mode);
2263                 store_value = result;
2264                 break;
2265         default:
2266                 panic("no incdec expr in create_incdec");
2267         }
2268
2269         set_value_for_expression_addr(value_expr, store_value, addr);
2270
2271         return result;
2272 }
2273
2274 static bool is_local_variable(expression_t *expression)
2275 {
2276         if (expression->kind != EXPR_REFERENCE)
2277                 return false;
2278         reference_expression_t *ref_expr = &expression->reference;
2279         entity_t               *entity   = ref_expr->entity;
2280         if (entity->kind != ENTITY_VARIABLE)
2281                 return false;
2282         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2283         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2284 }
2285
2286 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2287 {
2288         switch(kind) {
2289         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2290         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2291         case EXPR_BINARY_NOTEQUAL:
2292                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2293         case EXPR_BINARY_ISLESS:
2294         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2295         case EXPR_BINARY_ISLESSEQUAL:
2296         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2297         case EXPR_BINARY_ISGREATER:
2298         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2299         case EXPR_BINARY_ISGREATEREQUAL:
2300         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2301         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2302
2303         default:
2304                 break;
2305         }
2306         panic("trying to get pn_Cmp from non-comparison binexpr type");
2307 }
2308
2309 /**
2310  * Handle the assume optimizer hint: check if a Confirm
2311  * node can be created.
2312  *
2313  * @param dbi    debug info
2314  * @param expr   the IL assume expression
2315  *
2316  * we support here only some simple cases:
2317  *  - var rel const
2318  *  - const rel val
2319  *  - var rel var
2320  */
2321 static ir_node *handle_assume_compare(dbg_info *dbi,
2322                                       const binary_expression_t *expression)
2323 {
2324         expression_t *op1 = expression->left;
2325         expression_t *op2 = expression->right;
2326         entity_t     *var2, *var = NULL;
2327         ir_node      *res = NULL;
2328         pn_Cmp        cmp_val;
2329
2330         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2331
2332         if (is_local_variable(op1) && is_local_variable(op2)) {
2333         var  = op1->reference.entity;
2334             var2 = op2->reference.entity;
2335
2336                 type_t  *const type = skip_typeref(var->declaration.type);
2337                 ir_mode *const mode = get_ir_mode_storage(type);
2338
2339                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2340                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2341
2342                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2343                 set_value(var2->variable.v.value_number, res);
2344
2345                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2346                 set_value(var->variable.v.value_number, res);
2347
2348                 return res;
2349         }
2350
2351         expression_t *con;
2352         if (is_local_variable(op1) && is_constant_expression(op2)) {
2353                 var = op1->reference.entity;
2354                 con = op2;
2355         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2356                 cmp_val = get_inversed_pnc(cmp_val);
2357                 var = op2->reference.entity;
2358                 con = op1;
2359         }
2360
2361         if (var != NULL) {
2362                 type_t  *const type = skip_typeref(var->declaration.type);
2363                 ir_mode *const mode = get_ir_mode_storage(type);
2364
2365                 res = get_value(var->variable.v.value_number, mode);
2366                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2367                 set_value(var->variable.v.value_number, res);
2368         }
2369         return res;
2370 }
2371
2372 /**
2373  * Handle the assume optimizer hint.
2374  *
2375  * @param dbi    debug info
2376  * @param expr   the IL assume expression
2377  */
2378 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2379 {
2380         switch(expression->kind) {
2381         case EXPR_BINARY_EQUAL:
2382         case EXPR_BINARY_NOTEQUAL:
2383         case EXPR_BINARY_LESS:
2384         case EXPR_BINARY_LESSEQUAL:
2385         case EXPR_BINARY_GREATER:
2386         case EXPR_BINARY_GREATEREQUAL:
2387                 return handle_assume_compare(dbi, &expression->binary);
2388         default:
2389                 return NULL;
2390         }
2391 }
2392
2393 static ir_node *create_cast(dbg_info *dbgi,     ir_node *value_node,
2394                             type_t *from_type, type_t *type)
2395 {
2396         type = skip_typeref(type);
2397         if (!is_type_scalar(type)) {
2398                 /* make sure firm type is constructed */
2399                 (void) get_ir_type(type);
2400                 return value_node;
2401         }
2402
2403         from_type     = skip_typeref(from_type);
2404         ir_mode *mode = get_ir_mode_storage(type);
2405         /* check for conversion from / to __based types */
2406         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2407                 const variable_t *from_var = from_type->pointer.base_variable;
2408                 const variable_t *to_var   = type->pointer.base_variable;
2409                 if (from_var != to_var) {
2410                         if (from_var != NULL) {
2411                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2412                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2413                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2414                         }
2415                         if (to_var != NULL) {
2416                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2417                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2418                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2419                         }
2420                 }
2421         }
2422
2423         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2424                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2425                  * convert to mode_b so we only get a 0/1 value */
2426                 value_node = create_conv(dbgi, value_node, mode_b);
2427         }
2428
2429         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2430         ir_node *node       = create_conv(dbgi, value_node, mode);
2431         node                = do_strict_conv(dbgi, node);
2432         node                = create_conv(dbgi, node, mode_arith);
2433
2434         return node;
2435 }
2436
2437 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2438 {
2439         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2440         type_t   *type = skip_typeref(expression->base.type);
2441
2442         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2443                 return expression_to_addr(expression->value);
2444
2445         const expression_t *value = expression->value;
2446
2447         switch(expression->base.kind) {
2448         case EXPR_UNARY_NEGATE: {
2449                 ir_node *value_node = expression_to_firm(value);
2450                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2451                 return new_d_Minus(dbgi, value_node, mode);
2452         }
2453         case EXPR_UNARY_PLUS:
2454                 return expression_to_firm(value);
2455         case EXPR_UNARY_BITWISE_NEGATE: {
2456                 ir_node *value_node = expression_to_firm(value);
2457                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2458                 return new_d_Not(dbgi, value_node, mode);
2459         }
2460         case EXPR_UNARY_NOT: {
2461                 ir_node *value_node = _expression_to_firm(value);
2462                 value_node          = create_conv(dbgi, value_node, mode_b);
2463                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2464                 return res;
2465         }
2466         case EXPR_UNARY_DEREFERENCE: {
2467                 ir_node *value_node = expression_to_firm(value);
2468                 type_t  *value_type = skip_typeref(value->base.type);
2469                 assert(is_type_pointer(value_type));
2470
2471                 /* check for __based */
2472                 const variable_t *const base_var = value_type->pointer.base_variable;
2473                 if (base_var != NULL) {
2474                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2475                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2476                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2477                 }
2478                 type_t  *points_to  = value_type->pointer.points_to;
2479                 return deref_address(dbgi, points_to, value_node);
2480         }
2481         case EXPR_UNARY_POSTFIX_INCREMENT:
2482         case EXPR_UNARY_POSTFIX_DECREMENT:
2483         case EXPR_UNARY_PREFIX_INCREMENT:
2484         case EXPR_UNARY_PREFIX_DECREMENT:
2485                 return create_incdec(expression);
2486         case EXPR_UNARY_CAST_IMPLICIT:
2487         case EXPR_UNARY_CAST: {
2488                 ir_node *value_node = expression_to_firm(value);
2489                 type_t  *from_type  = value->base.type;
2490                 return create_cast(dbgi, value_node, from_type, type);
2491         }
2492         case EXPR_UNARY_ASSUME:
2493                 if (firm_opt.confirm)
2494                         return handle_assume(dbgi, value);
2495                 else
2496                         return NULL;
2497
2498         default:
2499                 break;
2500         }
2501         panic("invalid UNEXPR type found");
2502 }
2503
2504 /**
2505  * produces a 0/1 depending of the value of a mode_b node
2506  */
2507 static ir_node *produce_condition_result(const expression_t *expression,
2508                                          ir_mode *mode, dbg_info *dbgi)
2509 {
2510         ir_node *cur_block = get_cur_block();
2511
2512         ir_node *one_block = new_immBlock();
2513         set_cur_block(one_block);
2514         ir_node *one       = new_Const(get_mode_one(mode));
2515         ir_node *jmp_one   = new_d_Jmp(dbgi);
2516
2517         ir_node *zero_block = new_immBlock();
2518         set_cur_block(zero_block);
2519         ir_node *zero       = new_Const(get_mode_null(mode));
2520         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2521
2522         set_cur_block(cur_block);
2523         create_condition_evaluation(expression, one_block, zero_block);
2524         mature_immBlock(one_block);
2525         mature_immBlock(zero_block);
2526
2527         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2528         new_Block(2, in_cf);
2529
2530         ir_node *in[2] = { one, zero };
2531         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2532
2533         return val;
2534 }
2535
2536 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2537                 ir_node *value, type_t *type)
2538 {
2539         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2540         assert(is_type_pointer(type));
2541         pointer_type_t *const pointer_type = &type->pointer;
2542         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2543         ir_node        *      elem_size    = get_type_size_node(points_to);
2544         elem_size                          = create_conv(dbgi, elem_size, mode);
2545         value                              = create_conv(dbgi, value,     mode);
2546         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2547         return mul;
2548 }
2549
2550 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2551                           ir_node *left, ir_node *right)
2552 {
2553         ir_mode  *mode;
2554         type_t   *type_left  = skip_typeref(expression->left->base.type);
2555         type_t   *type_right = skip_typeref(expression->right->base.type);
2556
2557         expression_kind_t kind = expression->base.kind;
2558
2559         switch (kind) {
2560         case EXPR_BINARY_SHIFTLEFT:
2561         case EXPR_BINARY_SHIFTRIGHT:
2562         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2563         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2564                 mode  = get_irn_mode(left);
2565                 right = create_conv(dbgi, right, mode_uint);
2566                 break;
2567
2568         case EXPR_BINARY_SUB:
2569                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2570                         const pointer_type_t *const ptr_type = &type_left->pointer;
2571
2572                         mode = get_ir_mode_arithmetic(expression->base.type);
2573                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2574                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2575                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2576                         ir_node *const no_mem    = new_NoMem();
2577                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2578                                                                                                    mode, op_pin_state_floats);
2579                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2580                 }
2581                 /* fallthrough */
2582         case EXPR_BINARY_SUB_ASSIGN:
2583                 if (is_type_pointer(type_left)) {
2584                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2585                         mode  = get_ir_mode_arithmetic(type_left);
2586                         break;
2587                 }
2588                 goto normal_node;
2589
2590         case EXPR_BINARY_ADD:
2591         case EXPR_BINARY_ADD_ASSIGN:
2592                 if (is_type_pointer(type_left)) {
2593                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2594                         mode  = get_ir_mode_arithmetic(type_left);
2595                         break;
2596                 } else if (is_type_pointer(type_right)) {
2597                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2598                         mode  = get_ir_mode_arithmetic(type_right);
2599                         break;
2600                 }
2601                 goto normal_node;
2602
2603         default:
2604 normal_node:
2605                 mode = get_ir_mode_arithmetic(type_right);
2606                 left = create_conv(dbgi, left, mode);
2607                 break;
2608         }
2609
2610         switch (kind) {
2611         case EXPR_BINARY_ADD_ASSIGN:
2612         case EXPR_BINARY_ADD:
2613                 return new_d_Add(dbgi, left, right, mode);
2614         case EXPR_BINARY_SUB_ASSIGN:
2615         case EXPR_BINARY_SUB:
2616                 return new_d_Sub(dbgi, left, right, mode);
2617         case EXPR_BINARY_MUL_ASSIGN:
2618         case EXPR_BINARY_MUL:
2619                 return new_d_Mul(dbgi, left, right, mode);
2620         case EXPR_BINARY_BITWISE_AND:
2621         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2622                 return new_d_And(dbgi, left, right, mode);
2623         case EXPR_BINARY_BITWISE_OR:
2624         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2625                 return new_d_Or(dbgi, left, right, mode);
2626         case EXPR_BINARY_BITWISE_XOR:
2627         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2628                 return new_d_Eor(dbgi, left, right, mode);
2629         case EXPR_BINARY_SHIFTLEFT:
2630         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2631                 return new_d_Shl(dbgi, left, right, mode);
2632         case EXPR_BINARY_SHIFTRIGHT:
2633         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2634                 if (mode_is_signed(mode)) {
2635                         return new_d_Shrs(dbgi, left, right, mode);
2636                 } else {
2637                         return new_d_Shr(dbgi, left, right, mode);
2638                 }
2639         case EXPR_BINARY_DIV:
2640         case EXPR_BINARY_DIV_ASSIGN: {
2641                 ir_node *pin = new_Pin(new_NoMem());
2642                 ir_node *op;
2643                 ir_node *res;
2644                 if (mode_is_float(mode)) {
2645                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2646                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2647                 } else {
2648                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2649                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2650                 }
2651                 return res;
2652         }
2653         case EXPR_BINARY_MOD:
2654         case EXPR_BINARY_MOD_ASSIGN: {
2655                 ir_node *pin = new_Pin(new_NoMem());
2656                 assert(!mode_is_float(mode));
2657                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2658                                          op_pin_state_floats);
2659                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2660                 return res;
2661         }
2662         default:
2663                 panic("unexpected expression kind");
2664         }
2665 }
2666
2667 static ir_node *create_lazy_op(const binary_expression_t *expression)
2668 {
2669         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2670         type_t   *type = skip_typeref(expression->base.type);
2671         ir_mode  *mode = get_ir_mode_arithmetic(type);
2672
2673         if (is_constant_expression(expression->left)) {
2674                 bool val = fold_constant_to_bool(expression->left);
2675                 expression_kind_t ekind = expression->base.kind;
2676                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2677                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2678                         if (!val) {
2679                                 return new_Const(get_mode_null(mode));
2680                         }
2681                 } else {
2682                         if (val) {
2683                                 return new_Const(get_mode_one(mode));
2684                         }
2685                 }
2686
2687                 if (is_constant_expression(expression->right)) {
2688                         bool valr = fold_constant_to_bool(expression->right);
2689                         return valr ?
2690                                 new_Const(get_mode_one(mode)) :
2691                                 new_Const(get_mode_null(mode));
2692                 }
2693
2694                 return produce_condition_result(expression->right, mode, dbgi);
2695         }
2696
2697         return produce_condition_result((const expression_t*) expression, mode,
2698                                         dbgi);
2699 }
2700
2701 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2702                                             ir_node *right, ir_mode *mode);
2703
2704 static ir_node *create_assign_binop(const binary_expression_t *expression)
2705 {
2706         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2707         const expression_t *left_expr = expression->left;
2708         type_t             *type      = skip_typeref(left_expr->base.type);
2709         ir_node            *right     = expression_to_firm(expression->right);
2710         ir_node            *left_addr = expression_to_addr(left_expr);
2711         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2712         ir_node            *result    = create_op(dbgi, expression, left, right);
2713
2714         result = create_cast(dbgi, result, expression->right->base.type, type);
2715         result = do_strict_conv(dbgi, result);
2716
2717         result = set_value_for_expression_addr(left_expr, result, left_addr);
2718
2719         if (!is_type_compound(type)) {
2720                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2721                 result = create_conv(dbgi, result, mode_arithmetic);
2722         }
2723         return result;
2724 }
2725
2726 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2727 {
2728         expression_kind_t kind = expression->base.kind;
2729
2730         switch(kind) {
2731         case EXPR_BINARY_EQUAL:
2732         case EXPR_BINARY_NOTEQUAL:
2733         case EXPR_BINARY_LESS:
2734         case EXPR_BINARY_LESSEQUAL:
2735         case EXPR_BINARY_GREATER:
2736         case EXPR_BINARY_GREATEREQUAL:
2737         case EXPR_BINARY_ISGREATER:
2738         case EXPR_BINARY_ISGREATEREQUAL:
2739         case EXPR_BINARY_ISLESS:
2740         case EXPR_BINARY_ISLESSEQUAL:
2741         case EXPR_BINARY_ISLESSGREATER:
2742         case EXPR_BINARY_ISUNORDERED: {
2743                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2744                 ir_node *left  = expression_to_firm(expression->left);
2745                 ir_node *right = expression_to_firm(expression->right);
2746                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2747                 long     pnc   = get_pnc(kind, expression->left->base.type);
2748                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2749                 return proj;
2750         }
2751         case EXPR_BINARY_ASSIGN: {
2752                 ir_node *addr  = expression_to_addr(expression->left);
2753                 ir_node *right = expression_to_firm(expression->right);
2754                 ir_node *res
2755                         = set_value_for_expression_addr(expression->left, right, addr);
2756
2757                 type_t  *type            = skip_typeref(expression->base.type);
2758                 if (!is_type_compound(type)) {
2759                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2760                         res                      = create_conv(NULL, res, mode_arithmetic);
2761                 }
2762                 return res;
2763         }
2764         case EXPR_BINARY_ADD:
2765         case EXPR_BINARY_SUB:
2766         case EXPR_BINARY_MUL:
2767         case EXPR_BINARY_DIV:
2768         case EXPR_BINARY_MOD:
2769         case EXPR_BINARY_BITWISE_AND:
2770         case EXPR_BINARY_BITWISE_OR:
2771         case EXPR_BINARY_BITWISE_XOR:
2772         case EXPR_BINARY_SHIFTLEFT:
2773         case EXPR_BINARY_SHIFTRIGHT:
2774         {
2775                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2776                 ir_node  *left  = expression_to_firm(expression->left);
2777                 ir_node  *right = expression_to_firm(expression->right);
2778                 return create_op(dbgi, expression, left, right);
2779         }
2780         case EXPR_BINARY_LOGICAL_AND:
2781         case EXPR_BINARY_LOGICAL_OR:
2782                 return create_lazy_op(expression);
2783         case EXPR_BINARY_COMMA:
2784                 /* create side effects of left side */
2785                 (void) expression_to_firm(expression->left);
2786                 return _expression_to_firm(expression->right);
2787
2788         case EXPR_BINARY_ADD_ASSIGN:
2789         case EXPR_BINARY_SUB_ASSIGN:
2790         case EXPR_BINARY_MUL_ASSIGN:
2791         case EXPR_BINARY_MOD_ASSIGN:
2792         case EXPR_BINARY_DIV_ASSIGN:
2793         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2794         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2795         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2796         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2797         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2798                 return create_assign_binop(expression);
2799         default:
2800                 panic("TODO binexpr type");
2801         }
2802 }
2803
2804 static ir_node *array_access_addr(const array_access_expression_t *expression)
2805 {
2806         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2807         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2808         ir_node  *offset      = expression_to_firm(expression->index);
2809         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2810         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2811         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2812
2813         return result;
2814 }
2815
2816 static ir_node *array_access_to_firm(
2817                 const array_access_expression_t *expression)
2818 {
2819         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2820         ir_node  *addr   = array_access_addr(expression);
2821         type_t   *type   = revert_automatic_type_conversion(
2822                         (const expression_t*) expression);
2823         type             = skip_typeref(type);
2824
2825         return deref_address(dbgi, type, addr);
2826 }
2827
2828 static long get_offsetof_offset(const offsetof_expression_t *expression)
2829 {
2830         type_t *orig_type = expression->type;
2831         long    offset    = 0;
2832
2833         designator_t *designator = expression->designator;
2834         for ( ; designator != NULL; designator = designator->next) {
2835                 type_t *type = skip_typeref(orig_type);
2836                 /* be sure the type is constructed */
2837                 (void) get_ir_type(type);
2838
2839                 if (designator->symbol != NULL) {
2840                         assert(is_type_compound(type));
2841                         symbol_t *symbol = designator->symbol;
2842
2843                         compound_t *compound = type->compound.compound;
2844                         entity_t   *iter     = compound->members.entities;
2845                         for ( ; iter != NULL; iter = iter->base.next) {
2846                                 if (iter->base.symbol == symbol) {
2847                                         break;
2848                                 }
2849                         }
2850                         assert(iter != NULL);
2851
2852                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2853                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2854                         offset += get_entity_offset(iter->compound_member.entity);
2855
2856                         orig_type = iter->declaration.type;
2857                 } else {
2858                         expression_t *array_index = designator->array_index;
2859                         assert(designator->array_index != NULL);
2860                         assert(is_type_array(type));
2861
2862                         long index         = fold_constant_to_int(array_index);
2863                         ir_type *arr_type  = get_ir_type(type);
2864                         ir_type *elem_type = get_array_element_type(arr_type);
2865                         long     elem_size = get_type_size_bytes(elem_type);
2866
2867                         offset += index * elem_size;
2868
2869                         orig_type = type->array.element_type;
2870                 }
2871         }
2872
2873         return offset;
2874 }
2875
2876 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2877 {
2878         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2879         long      offset = get_offsetof_offset(expression);
2880         tarval   *tv     = new_tarval_from_long(offset, mode);
2881         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2882
2883         return new_d_Const(dbgi, tv);
2884 }
2885
2886 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2887                                      ir_entity *entity, type_t *type);
2888
2889 static ir_node *compound_literal_to_firm(
2890                 const compound_literal_expression_t *expression)
2891 {
2892         type_t *type = expression->type;
2893
2894         /* create an entity on the stack */
2895         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2896
2897         ident     *const id     = id_unique("CompLit.%u");
2898         ir_type   *const irtype = get_ir_type(type);
2899         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2900         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2901         set_entity_ld_ident(entity, id);
2902
2903         /* create initialisation code */
2904         initializer_t *initializer = expression->initializer;
2905         create_local_initializer(initializer, dbgi, entity, type);
2906
2907         /* create a sel for the compound literal address */
2908         ir_node *frame = get_irg_frame(current_ir_graph);
2909         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2910         return sel;
2911 }
2912
2913 /**
2914  * Transform a sizeof expression into Firm code.
2915  */
2916 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2917 {
2918         type_t *const type = skip_typeref(expression->type);
2919         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2920         if (is_type_array(type) && type->array.is_vla
2921                         && expression->tp_expression != NULL) {
2922                 expression_to_firm(expression->tp_expression);
2923         }
2924
2925         return get_type_size_node(type);
2926 }
2927
2928 static entity_t *get_expression_entity(const expression_t *expression)
2929 {
2930         if (expression->kind != EXPR_REFERENCE)
2931                 return NULL;
2932
2933         return expression->reference.entity;
2934 }
2935
2936 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2937 {
2938         switch(entity->kind) {
2939         DECLARATION_KIND_CASES
2940                 return entity->declaration.alignment;
2941         case ENTITY_STRUCT:
2942         case ENTITY_UNION:
2943                 return entity->compound.alignment;
2944         case ENTITY_TYPEDEF:
2945                 return entity->typedefe.alignment;
2946         default:
2947                 break;
2948         }
2949         return 0;
2950 }
2951
2952 /**
2953  * Transform an alignof expression into Firm code.
2954  */
2955 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2956 {
2957         unsigned alignment = 0;
2958
2959         const expression_t *tp_expression = expression->tp_expression;
2960         if (tp_expression != NULL) {
2961                 entity_t *entity = get_expression_entity(tp_expression);
2962                 if (entity != NULL) {
2963                         alignment = get_cparser_entity_alignment(entity);
2964                 }
2965         }
2966
2967         if (alignment == 0) {
2968                 type_t *type = expression->type;
2969                 alignment = get_type_alignment(type);
2970         }
2971
2972         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2973         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
2974         tarval   *tv   = new_tarval_from_long(alignment, mode);
2975         return new_d_Const(dbgi, tv);
2976 }
2977
2978 static void init_ir_types(void);
2979
2980 static tarval *fold_constant_to_tarval(const expression_t *expression)
2981 {
2982         assert(is_type_valid(skip_typeref(expression->base.type)));
2983
2984         bool constant_folding_old = constant_folding;
2985         constant_folding = true;
2986
2987         init_ir_types();
2988
2989         assert(is_constant_expression(expression));
2990
2991         ir_graph *old_current_ir_graph = current_ir_graph;
2992         current_ir_graph = get_const_code_irg();
2993
2994         ir_node *cnst = expression_to_firm(expression);
2995         current_ir_graph = old_current_ir_graph;
2996
2997         if (!is_Const(cnst)) {
2998                 panic("couldn't fold constant");
2999         }
3000
3001         constant_folding = constant_folding_old;
3002
3003         tarval *tv = get_Const_tarval(cnst);
3004         return tv;
3005 }
3006
3007 long fold_constant_to_int(const expression_t *expression)
3008 {
3009         if (expression->kind == EXPR_INVALID)
3010                 return 0;
3011
3012         tarval *tv = fold_constant_to_tarval(expression);
3013         if (!tarval_is_long(tv)) {
3014                 panic("result of constant folding is not integer");
3015         }
3016
3017         return get_tarval_long(tv);
3018 }
3019
3020 bool fold_constant_to_bool(const expression_t *expression)
3021 {
3022         if (expression->kind == EXPR_INVALID)
3023                 return false;
3024         tarval *tv = fold_constant_to_tarval(expression);
3025         return !tarval_is_null(tv);
3026 }
3027
3028 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3029 {
3030         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3031
3032         /* first try to fold a constant condition */
3033         if (is_constant_expression(expression->condition)) {
3034                 bool val = fold_constant_to_bool(expression->condition);
3035                 if (val) {
3036                         expression_t *true_expression = expression->true_expression;
3037                         if (true_expression == NULL)
3038                                 true_expression = expression->condition;
3039                         return expression_to_firm(true_expression);
3040                 } else {
3041                         return expression_to_firm(expression->false_expression);
3042                 }
3043         }
3044
3045         ir_node *cur_block   = get_cur_block();
3046
3047         /* create the true block */
3048         ir_node *true_block  = new_immBlock();
3049         set_cur_block(true_block);
3050
3051         ir_node *true_val = expression->true_expression != NULL ?
3052                 expression_to_firm(expression->true_expression) : NULL;
3053         ir_node *true_jmp = new_Jmp();
3054
3055         /* create the false block */
3056         ir_node *false_block = new_immBlock();
3057         set_cur_block(false_block);
3058
3059         ir_node *false_val = expression_to_firm(expression->false_expression);
3060         ir_node *false_jmp = new_Jmp();
3061
3062         /* create the condition evaluation */
3063         set_cur_block(cur_block);
3064         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3065         if (expression->true_expression == NULL) {
3066                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3067                         true_val = cond_expr;
3068                 } else {
3069                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3070                          * comparison.  Generate a "1" as value for the true branch. */
3071                         true_val = new_Const(get_mode_one(mode_Is));
3072                 }
3073         }
3074         mature_immBlock(true_block);
3075         mature_immBlock(false_block);
3076
3077         /* create the common block */
3078         ir_node *in_cf[2] = { true_jmp, false_jmp };
3079         new_Block(2, in_cf);
3080
3081         /* TODO improve static semantics, so either both or no values are NULL */
3082         if (true_val == NULL || false_val == NULL)
3083                 return NULL;
3084
3085         ir_node *in[2] = { true_val, false_val };
3086         ir_mode *mode  = get_irn_mode(true_val);
3087         assert(get_irn_mode(false_val) == mode);
3088         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3089
3090         return val;
3091 }
3092
3093 /**
3094  * Returns an IR-node representing the address of a field.
3095  */
3096 static ir_node *select_addr(const select_expression_t *expression)
3097 {
3098         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3099
3100         construct_select_compound(expression);
3101
3102         ir_node *compound_addr = expression_to_firm(expression->compound);
3103
3104         entity_t *entry = expression->compound_entry;
3105         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3106         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3107
3108         if (constant_folding) {
3109                 ir_mode *mode = get_irn_mode(compound_addr);
3110                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3111                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3112                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3113         } else {
3114                 ir_entity *irentity = entry->compound_member.entity;
3115                 assert(irentity != NULL);
3116                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3117         }
3118 }
3119
3120 static ir_node *select_to_firm(const select_expression_t *expression)
3121 {
3122         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3123         ir_node  *addr = select_addr(expression);
3124         type_t   *type = revert_automatic_type_conversion(
3125                         (const expression_t*) expression);
3126         type           = skip_typeref(type);
3127
3128         entity_t *entry      = expression->compound_entry;
3129         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3130         type_t   *entry_type = skip_typeref(entry->declaration.type);
3131
3132         if (entry_type->kind == TYPE_BITFIELD) {
3133                 return bitfield_extract_to_firm(expression, addr);
3134         }
3135
3136         return deref_address(dbgi, type, addr);
3137 }
3138
3139 /* Values returned by __builtin_classify_type. */
3140 typedef enum gcc_type_class
3141 {
3142         no_type_class = -1,
3143         void_type_class,
3144         integer_type_class,
3145         char_type_class,
3146         enumeral_type_class,
3147         boolean_type_class,
3148         pointer_type_class,
3149         reference_type_class,
3150         offset_type_class,
3151         real_type_class,
3152         complex_type_class,
3153         function_type_class,
3154         method_type_class,
3155         record_type_class,
3156         union_type_class,
3157         array_type_class,
3158         string_type_class,
3159         set_type_class,
3160         file_type_class,
3161         lang_type_class
3162 } gcc_type_class;
3163
3164 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3165 {
3166         type_t *type = expr->type_expression->base.type;
3167
3168         /* FIXME gcc returns different values depending on whether compiling C or C++
3169          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3170         gcc_type_class tc;
3171         for (;;) {
3172                 type = skip_typeref(type);
3173                 switch (type->kind) {
3174                         case TYPE_ATOMIC: {
3175                                 const atomic_type_t *const atomic_type = &type->atomic;
3176                                 switch (atomic_type->akind) {
3177                                         /* should not be reached */
3178                                         case ATOMIC_TYPE_INVALID:
3179                                                 tc = no_type_class;
3180                                                 goto make_const;
3181
3182                                         /* gcc cannot do that */
3183                                         case ATOMIC_TYPE_VOID:
3184                                                 tc = void_type_class;
3185                                                 goto make_const;
3186
3187                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3188                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3189                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3190                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3191                                         case ATOMIC_TYPE_SHORT:
3192                                         case ATOMIC_TYPE_USHORT:
3193                                         case ATOMIC_TYPE_INT:
3194                                         case ATOMIC_TYPE_UINT:
3195                                         case ATOMIC_TYPE_LONG:
3196                                         case ATOMIC_TYPE_ULONG:
3197                                         case ATOMIC_TYPE_LONGLONG:
3198                                         case ATOMIC_TYPE_ULONGLONG:
3199                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3200                                                 tc = integer_type_class;
3201                                                 goto make_const;
3202
3203                                         case ATOMIC_TYPE_FLOAT:
3204                                         case ATOMIC_TYPE_DOUBLE:
3205                                         case ATOMIC_TYPE_LONG_DOUBLE:
3206                                                 tc = real_type_class;
3207                                                 goto make_const;
3208                                 }
3209                                 panic("Unexpected atomic type in classify_type_to_firm().");
3210                         }
3211
3212                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3213                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3214                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3215                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3216                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3217                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3218                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3219                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3220
3221                         /* gcc handles this as integer */
3222                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3223
3224                         /* gcc classifies the referenced type */
3225                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3226
3227                         case TYPE_BUILTIN:
3228                         /* typedef/typeof should be skipped already */
3229                         case TYPE_TYPEDEF:
3230                         case TYPE_TYPEOF:
3231                         case TYPE_INVALID:
3232                         case TYPE_ERROR:
3233                                 break;
3234                 }
3235                 panic("unexpected TYPE classify_type_to_firm().");
3236         }
3237
3238 make_const:;
3239         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3240         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3241         return new_d_Const(dbgi, tv);
3242 }
3243
3244 static ir_node *function_name_to_firm(
3245                 const funcname_expression_t *const expr)
3246 {
3247         switch(expr->kind) {
3248         case FUNCNAME_FUNCTION:
3249         case FUNCNAME_PRETTY_FUNCTION:
3250         case FUNCNAME_FUNCDNAME:
3251                 if (current_function_name == NULL) {
3252                         const source_position_t *const src_pos = &expr->base.source_position;
3253                         const char    *name  = current_function_entity->base.symbol->string;
3254                         const string_t string = { name, strlen(name) + 1 };
3255                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3256                 }
3257                 return current_function_name;
3258         case FUNCNAME_FUNCSIG:
3259                 if (current_funcsig == NULL) {
3260                         const source_position_t *const src_pos = &expr->base.source_position;
3261                         ir_entity *ent = get_irg_entity(current_ir_graph);
3262                         const char *const name = get_entity_ld_name(ent);
3263                         const string_t string = { name, strlen(name) + 1 };
3264                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3265                 }
3266                 return current_funcsig;
3267         }
3268         panic("Unsupported function name");
3269 }
3270
3271 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3272 {
3273         statement_t *statement = expr->statement;
3274
3275         assert(statement->kind == STATEMENT_COMPOUND);
3276         return compound_statement_to_firm(&statement->compound);
3277 }
3278
3279 static ir_node *va_start_expression_to_firm(
3280         const va_start_expression_t *const expr)
3281 {
3282         type_t    *const type        = current_function_entity->declaration.type;
3283         ir_type   *const method_type = get_ir_type(type);
3284         int        const n           = get_method_n_params(method_type) - 1;
3285         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3286         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3287         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3288         ir_node   *const no_mem      = new_NoMem();
3289         ir_node   *const arg_sel     =
3290                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3291
3292         type_t    *const param_type  = expr->parameter->base.type;
3293         ir_node   *const cnst        = get_type_size_node(param_type);
3294         ir_mode   *const mode        = get_irn_mode(cnst);
3295         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3296         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3297         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3298         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3299         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3300         set_value_for_expression(expr->ap, add);
3301
3302         return NULL;
3303 }
3304
3305 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3306 {
3307         type_t       *const type    = expr->base.type;
3308         expression_t *const ap_expr = expr->ap;
3309         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3310         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3311         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3312         ir_node      *const res     = deref_address(dbgi, type, ap);
3313
3314         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3315         ir_mode      *const mode    = get_irn_mode(cnst);
3316         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3317         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3318         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3319         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3320         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3321
3322         set_value_for_expression_addr(ap_expr, add, ap_addr);
3323
3324         return res;
3325 }
3326
3327 /**
3328  * Generate Firm for a va_copy expression.
3329  */
3330 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3331 {
3332         ir_node *const src = expression_to_firm(expr->src);
3333         set_value_for_expression(expr->dst, src);
3334         return NULL;
3335 }
3336
3337 static ir_node *dereference_addr(const unary_expression_t *const expression)
3338 {
3339         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3340         return expression_to_firm(expression->value);
3341 }
3342
3343 /**
3344  * Returns a IR-node representing an lvalue of the given expression.
3345  */
3346 static ir_node *expression_to_addr(const expression_t *expression)
3347 {
3348         switch(expression->kind) {
3349         case EXPR_ARRAY_ACCESS:
3350                 return array_access_addr(&expression->array_access);
3351         case EXPR_CALL:
3352                 return call_expression_to_firm(&expression->call);
3353         case EXPR_COMPOUND_LITERAL:
3354                 return compound_literal_to_firm(&expression->compound_literal);
3355         case EXPR_REFERENCE:
3356                 return reference_addr(&expression->reference);
3357         case EXPR_SELECT:
3358                 return select_addr(&expression->select);
3359         case EXPR_UNARY_DEREFERENCE:
3360                 return dereference_addr(&expression->unary);
3361         default:
3362                 break;
3363         }
3364         panic("trying to get address of non-lvalue");
3365 }
3366
3367 static ir_node *builtin_constant_to_firm(
3368                 const builtin_constant_expression_t *expression)
3369 {
3370         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3371         long     v;
3372
3373         if (is_constant_expression(expression->value)) {
3374                 v = 1;
3375         } else {
3376                 v = 0;
3377         }
3378         return new_Const_long(mode, v);
3379 }
3380
3381 static ir_node *builtin_types_compatible_to_firm(
3382                 const builtin_types_compatible_expression_t *expression)
3383 {
3384         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3385         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3386         long     const value = types_compatible(left, right) ? 1 : 0;
3387         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3388         return new_Const_long(mode, value);
3389 }
3390
3391 static ir_node *get_label_block(label_t *label)
3392 {
3393         if (label->block != NULL)
3394                 return label->block;
3395
3396         /* beware: might be called from create initializer with current_ir_graph
3397          * set to const_code_irg. */
3398         ir_graph *rem    = current_ir_graph;
3399         current_ir_graph = current_function;
3400
3401         ir_node *block = new_immBlock();
3402
3403         label->block = block;
3404
3405         ARR_APP1(label_t *, all_labels, label);
3406
3407         current_ir_graph = rem;
3408         return block;
3409 }
3410
3411 /**
3412  * Pointer to a label.  This is used for the
3413  * GNU address-of-label extension.
3414  */
3415 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3416 {
3417         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3418         ir_node   *block  = get_label_block(label->label);
3419         ir_entity *entity = create_Block_entity(block);
3420
3421         symconst_symbol value;
3422         value.entity_p = entity;
3423         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3424 }
3425
3426 /**
3427  * creates firm nodes for an expression. The difference between this function
3428  * and expression_to_firm is, that this version might produce mode_b nodes
3429  * instead of mode_Is.
3430  */
3431 static ir_node *_expression_to_firm(const expression_t *expression)
3432 {
3433 #ifndef NDEBUG
3434         if (!constant_folding) {
3435                 assert(!expression->base.transformed);
3436                 ((expression_t*) expression)->base.transformed = true;
3437         }
3438 #endif
3439
3440         switch (expression->kind) {
3441         case EXPR_CHARACTER_CONSTANT:
3442                 return character_constant_to_firm(&expression->conste);
3443         case EXPR_WIDE_CHARACTER_CONSTANT:
3444                 return wide_character_constant_to_firm(&expression->conste);
3445         case EXPR_CONST:
3446                 return const_to_firm(&expression->conste);
3447         case EXPR_STRING_LITERAL:
3448                 return string_literal_to_firm(&expression->string);
3449         case EXPR_WIDE_STRING_LITERAL:
3450                 return wide_string_literal_to_firm(&expression->wide_string);
3451         case EXPR_REFERENCE:
3452                 return reference_expression_to_firm(&expression->reference);
3453         case EXPR_REFERENCE_ENUM_VALUE:
3454                 return reference_expression_enum_value_to_firm(&expression->reference);
3455         case EXPR_CALL:
3456                 return call_expression_to_firm(&expression->call);
3457         EXPR_UNARY_CASES
3458                 return unary_expression_to_firm(&expression->unary);
3459         EXPR_BINARY_CASES
3460                 return binary_expression_to_firm(&expression->binary);
3461         case EXPR_ARRAY_ACCESS:
3462                 return array_access_to_firm(&expression->array_access);
3463         case EXPR_SIZEOF:
3464                 return sizeof_to_firm(&expression->typeprop);
3465         case EXPR_ALIGNOF:
3466                 return alignof_to_firm(&expression->typeprop);
3467         case EXPR_CONDITIONAL:
3468                 return conditional_to_firm(&expression->conditional);
3469         case EXPR_SELECT:
3470                 return select_to_firm(&expression->select);
3471         case EXPR_CLASSIFY_TYPE:
3472                 return classify_type_to_firm(&expression->classify_type);
3473         case EXPR_FUNCNAME:
3474                 return function_name_to_firm(&expression->funcname);
3475         case EXPR_STATEMENT:
3476                 return statement_expression_to_firm(&expression->statement);
3477         case EXPR_VA_START:
3478                 return va_start_expression_to_firm(&expression->va_starte);
3479         case EXPR_VA_ARG:
3480                 return va_arg_expression_to_firm(&expression->va_arge);
3481         case EXPR_VA_COPY:
3482                 return va_copy_expression_to_firm(&expression->va_copye);
3483         case EXPR_BUILTIN_CONSTANT_P:
3484                 return builtin_constant_to_firm(&expression->builtin_constant);
3485         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3486                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3487         case EXPR_OFFSETOF:
3488                 return offsetof_to_firm(&expression->offsetofe);
3489         case EXPR_COMPOUND_LITERAL:
3490                 return compound_literal_to_firm(&expression->compound_literal);
3491         case EXPR_LABEL_ADDRESS:
3492                 return label_address_to_firm(&expression->label_address);
3493
3494         case EXPR_UNKNOWN:
3495         case EXPR_INVALID:
3496                 break;
3497         }
3498         panic("invalid expression found");
3499 }
3500
3501 /**
3502  * Check if a given expression is a GNU __builtin_expect() call.
3503  */
3504 static bool is_builtin_expect(const expression_t *expression)
3505 {
3506         if (expression->kind != EXPR_CALL)
3507                 return false;
3508
3509         expression_t *function = expression->call.function;
3510         if (function->kind != EXPR_REFERENCE)
3511                 return false;
3512         reference_expression_t *ref = &function->reference;
3513         if (ref->entity->kind         != ENTITY_FUNCTION ||
3514             ref->entity->function.btk != bk_gnu_builtin_expect)
3515                 return false;
3516
3517         return true;
3518 }
3519
3520 static bool produces_mode_b(const expression_t *expression)
3521 {
3522         switch (expression->kind) {
3523         case EXPR_BINARY_EQUAL:
3524         case EXPR_BINARY_NOTEQUAL:
3525         case EXPR_BINARY_LESS:
3526         case EXPR_BINARY_LESSEQUAL:
3527         case EXPR_BINARY_GREATER:
3528         case EXPR_BINARY_GREATEREQUAL:
3529         case EXPR_BINARY_ISGREATER:
3530         case EXPR_BINARY_ISGREATEREQUAL:
3531         case EXPR_BINARY_ISLESS:
3532         case EXPR_BINARY_ISLESSEQUAL:
3533         case EXPR_BINARY_ISLESSGREATER:
3534         case EXPR_BINARY_ISUNORDERED:
3535         case EXPR_UNARY_NOT:
3536                 return true;
3537
3538         case EXPR_CALL:
3539                 if (is_builtin_expect(expression)) {
3540                         expression_t *argument = expression->call.arguments->expression;
3541                         return produces_mode_b(argument);
3542                 }
3543                 return false;
3544         case EXPR_BINARY_COMMA:
3545                 return produces_mode_b(expression->binary.right);
3546
3547         default:
3548                 return false;
3549         }
3550 }
3551
3552 static ir_node *expression_to_firm(const expression_t *expression)
3553 {
3554         if (!produces_mode_b(expression)) {
3555                 ir_node *res = _expression_to_firm(expression);
3556                 assert(res == NULL || get_irn_mode(res) != mode_b);
3557                 return res;
3558         }
3559
3560         if (is_constant_expression(expression)) {
3561                 ir_node *res  = _expression_to_firm(expression);
3562                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3563                 assert(is_Const(res));
3564                 if (is_Const_null(res)) {
3565                         return new_Const_long(mode, 0);
3566                 } else {
3567                         return new_Const_long(mode, 1);
3568                 }
3569         }
3570
3571         /* we have to produce a 0/1 from the mode_b expression */
3572         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3573         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3574         return produce_condition_result(expression, mode, dbgi);
3575 }
3576
3577 /**
3578  * create a short-circuit expression evaluation that tries to construct
3579  * efficient control flow structures for &&, || and ! expressions
3580  */
3581 static ir_node *create_condition_evaluation(const expression_t *expression,
3582                                             ir_node *true_block,
3583                                             ir_node *false_block)
3584 {
3585         switch(expression->kind) {
3586         case EXPR_UNARY_NOT: {
3587                 const unary_expression_t *unary_expression = &expression->unary;
3588                 create_condition_evaluation(unary_expression->value, false_block,
3589                                             true_block);
3590                 return NULL;
3591         }
3592         case EXPR_BINARY_LOGICAL_AND: {
3593                 const binary_expression_t *binary_expression = &expression->binary;
3594
3595                 ir_node *extra_block = new_immBlock();
3596                 create_condition_evaluation(binary_expression->left, extra_block,
3597                                             false_block);
3598                 mature_immBlock(extra_block);
3599                 set_cur_block(extra_block);
3600                 create_condition_evaluation(binary_expression->right, true_block,
3601                                             false_block);
3602                 return NULL;
3603         }
3604         case EXPR_BINARY_LOGICAL_OR: {
3605                 const binary_expression_t *binary_expression = &expression->binary;
3606
3607                 ir_node *extra_block = new_immBlock();
3608                 create_condition_evaluation(binary_expression->left, true_block,
3609                                             extra_block);
3610                 mature_immBlock(extra_block);
3611                 set_cur_block(extra_block);
3612                 create_condition_evaluation(binary_expression->right, true_block,
3613                                             false_block);
3614                 return NULL;
3615         }
3616         default:
3617                 break;
3618         }
3619
3620         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3621         ir_node  *cond_expr  = _expression_to_firm(expression);
3622         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3623         ir_node  *cond       = new_d_Cond(dbgi, condition);
3624         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3625         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3626
3627         /* set branch prediction info based on __builtin_expect */
3628         if (is_builtin_expect(expression) && is_Cond(cond)) {
3629                 call_argument_t *argument = expression->call.arguments->next;
3630                 if (is_constant_expression(argument->expression)) {
3631                         bool             cnst = fold_constant_to_bool(argument->expression);
3632                         cond_jmp_predicate pred;
3633
3634                         if (cnst == false) {
3635                                 pred = COND_JMP_PRED_FALSE;
3636                         } else {
3637                                 pred = COND_JMP_PRED_TRUE;
3638                         }
3639                         set_Cond_jmp_pred(cond, pred);
3640                 }
3641         }
3642
3643         add_immBlock_pred(true_block, true_proj);
3644         add_immBlock_pred(false_block, false_proj);
3645
3646         set_cur_block(NULL);
3647         return cond_expr;
3648 }
3649
3650 static void create_variable_entity(entity_t *variable,
3651                                    declaration_kind_t declaration_kind,
3652                                    ir_type *parent_type)
3653 {
3654         assert(variable->kind == ENTITY_VARIABLE);
3655         type_t    *type = skip_typeref(variable->declaration.type);
3656
3657         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3658         ir_type   *const irtype    = get_ir_type(type);
3659         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3660         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3661         unsigned         alignment = variable->declaration.alignment;
3662
3663         set_entity_alignment(irentity, alignment);
3664
3665         handle_decl_modifiers(irentity, variable);
3666
3667         variable->declaration.kind  = (unsigned char) declaration_kind;
3668         variable->variable.v.entity = irentity;
3669         set_entity_ld_ident(irentity, create_ld_ident(variable));
3670
3671         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3672                 set_entity_volatility(irentity, volatility_is_volatile);
3673         }
3674 }
3675
3676
3677 typedef struct type_path_entry_t type_path_entry_t;
3678 struct type_path_entry_t {
3679         type_t           *type;
3680         ir_initializer_t *initializer;
3681         size_t            index;
3682         entity_t         *compound_entry;
3683 };
3684
3685 typedef struct type_path_t type_path_t;
3686 struct type_path_t {
3687         type_path_entry_t *path;
3688         type_t            *top_type;
3689         bool               invalid;
3690 };
3691
3692 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3693 {
3694         size_t len = ARR_LEN(path->path);
3695
3696         for (size_t i = 0; i < len; ++i) {
3697                 const type_path_entry_t *entry = & path->path[i];
3698
3699                 type_t *type = skip_typeref(entry->type);
3700                 if (is_type_compound(type)) {
3701                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3702                 } else if (is_type_array(type)) {
3703                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3704                 } else {
3705                         fprintf(stderr, "-INVALID-");
3706                 }
3707         }
3708         fprintf(stderr, "  (");
3709         print_type(path->top_type);
3710         fprintf(stderr, ")");
3711 }
3712
3713 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3714 {
3715         size_t len = ARR_LEN(path->path);
3716         assert(len > 0);
3717         return & path->path[len-1];
3718 }
3719
3720 static type_path_entry_t *append_to_type_path(type_path_t *path)
3721 {
3722         size_t len = ARR_LEN(path->path);
3723         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3724
3725         type_path_entry_t *result = & path->path[len];
3726         memset(result, 0, sizeof(result[0]));
3727         return result;
3728 }
3729
3730 static size_t get_compound_member_count(const compound_type_t *type)
3731 {
3732         compound_t *compound  = type->compound;
3733         size_t      n_members = 0;
3734         entity_t   *member    = compound->members.entities;
3735         for ( ; member != NULL; member = member->base.next) {
3736                 ++n_members;
3737         }
3738
3739         return n_members;
3740 }
3741
3742 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3743 {
3744         type_t *orig_top_type = path->top_type;
3745         type_t *top_type      = skip_typeref(orig_top_type);
3746
3747         assert(is_type_compound(top_type) || is_type_array(top_type));
3748
3749         if (ARR_LEN(path->path) == 0) {
3750                 return NULL;
3751         } else {
3752                 type_path_entry_t *top         = get_type_path_top(path);
3753                 ir_initializer_t  *initializer = top->initializer;
3754                 return get_initializer_compound_value(initializer, top->index);
3755         }
3756 }
3757
3758 static void descend_into_subtype(type_path_t *path)
3759 {
3760         type_t *orig_top_type = path->top_type;
3761         type_t *top_type      = skip_typeref(orig_top_type);
3762
3763         assert(is_type_compound(top_type) || is_type_array(top_type));
3764
3765         ir_initializer_t *initializer = get_initializer_entry(path);
3766
3767         type_path_entry_t *top = append_to_type_path(path);
3768         top->type              = top_type;
3769
3770         size_t len;
3771
3772         if (is_type_compound(top_type)) {
3773                 compound_t *compound = top_type->compound.compound;
3774                 entity_t   *entry    = compound->members.entities;
3775
3776                 top->compound_entry = entry;
3777                 top->index          = 0;
3778                 len                 = get_compound_member_count(&top_type->compound);
3779                 if (entry != NULL) {
3780                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3781                         path->top_type = entry->declaration.type;
3782                 }
3783         } else {
3784                 assert(is_type_array(top_type));
3785                 assert(top_type->array.size > 0);
3786
3787                 top->index     = 0;
3788                 path->top_type = top_type->array.element_type;
3789                 len            = top_type->array.size;
3790         }
3791         if (initializer == NULL
3792                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3793                 initializer = create_initializer_compound(len);
3794                 /* we have to set the entry at the 2nd latest path entry... */
3795                 size_t path_len = ARR_LEN(path->path);
3796                 assert(path_len >= 1);
3797                 if (path_len > 1) {
3798                         type_path_entry_t *entry        = & path->path[path_len-2];
3799                         ir_initializer_t  *tinitializer = entry->initializer;
3800                         set_initializer_compound_value(tinitializer, entry->index,
3801                                                        initializer);
3802                 }
3803         }
3804         top->initializer = initializer;
3805 }
3806
3807 static void ascend_from_subtype(type_path_t *path)
3808 {
3809         type_path_entry_t *top = get_type_path_top(path);
3810
3811         path->top_type = top->type;
3812
3813         size_t len = ARR_LEN(path->path);
3814         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3815 }
3816
3817 static void walk_designator(type_path_t *path, const designator_t *designator)
3818 {
3819         /* designators start at current object type */
3820         ARR_RESIZE(type_path_entry_t, path->path, 1);
3821
3822         for ( ; designator != NULL; designator = designator->next) {
3823                 type_path_entry_t *top         = get_type_path_top(path);
3824                 type_t            *orig_type   = top->type;
3825                 type_t            *type        = skip_typeref(orig_type);
3826
3827                 if (designator->symbol != NULL) {
3828                         assert(is_type_compound(type));
3829                         size_t    index  = 0;
3830                         symbol_t *symbol = designator->symbol;
3831
3832                         compound_t *compound = type->compound.compound;
3833                         entity_t   *iter     = compound->members.entities;
3834                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3835                                 if (iter->base.symbol == symbol) {
3836                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3837                                         break;
3838                                 }
3839                         }
3840                         assert(iter != NULL);
3841
3842                         /* revert previous initialisations of other union elements */
3843                         if (type->kind == TYPE_COMPOUND_UNION) {
3844                                 ir_initializer_t *initializer = top->initializer;
3845                                 if (initializer != NULL
3846                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3847                                         /* are we writing to a new element? */
3848                                         ir_initializer_t *oldi
3849                                                 = get_initializer_compound_value(initializer, index);
3850                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3851                                                 /* clear initializer */
3852                                                 size_t len
3853                                                         = get_initializer_compound_n_entries(initializer);
3854                                                 ir_initializer_t *nulli = get_initializer_null();
3855                                                 for (size_t i = 0; i < len; ++i) {
3856                                                         set_initializer_compound_value(initializer, i,
3857                                                                                        nulli);
3858                                                 }
3859                                         }
3860                                 }
3861                         }
3862
3863                         top->type           = orig_type;
3864                         top->compound_entry = iter;
3865                         top->index          = index;
3866                         orig_type           = iter->declaration.type;
3867                 } else {
3868                         expression_t *array_index = designator->array_index;
3869                         assert(designator->array_index != NULL);
3870                         assert(is_type_array(type));
3871
3872                         long index = fold_constant_to_int(array_index);
3873                         assert(index >= 0);
3874 #ifndef NDEBUG
3875                         if (type->array.size_constant) {
3876                                 long array_size = type->array.size;
3877                                 assert(index < array_size);
3878                         }
3879 #endif
3880
3881                         top->type  = orig_type;
3882                         top->index = (size_t) index;
3883                         orig_type  = type->array.element_type;
3884                 }
3885                 path->top_type = orig_type;
3886
3887                 if (designator->next != NULL) {
3888                         descend_into_subtype(path);
3889                 }
3890         }
3891
3892         path->invalid  = false;
3893 }
3894
3895 static void advance_current_object(type_path_t *path)
3896 {
3897         if (path->invalid) {
3898                 /* TODO: handle this... */
3899                 panic("invalid initializer in ast2firm (excessive elements)");
3900         }
3901
3902         type_path_entry_t *top = get_type_path_top(path);
3903
3904         type_t *type = skip_typeref(top->type);
3905         if (is_type_union(type)) {
3906                 /* only the first element is initialized in unions */
3907                 top->compound_entry = NULL;
3908         } else if (is_type_struct(type)) {
3909                 entity_t *entry = top->compound_entry;
3910
3911                 top->index++;
3912                 entry               = entry->base.next;
3913                 top->compound_entry = entry;
3914                 if (entry != NULL) {
3915                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3916                         path->top_type = entry->declaration.type;
3917                         return;
3918                 }
3919         } else {
3920                 assert(is_type_array(type));
3921
3922                 top->index++;
3923                 if (!type->array.size_constant || top->index < type->array.size) {
3924                         return;
3925                 }
3926         }
3927
3928         /* we're past the last member of the current sub-aggregate, try if we
3929          * can ascend in the type hierarchy and continue with another subobject */
3930         size_t len = ARR_LEN(path->path);
3931
3932         if (len > 1) {
3933                 ascend_from_subtype(path);
3934                 advance_current_object(path);
3935         } else {
3936                 path->invalid = true;
3937         }
3938 }
3939
3940
3941 static ir_initializer_t *create_ir_initializer(
3942                 const initializer_t *initializer, type_t *type);
3943
3944 static ir_initializer_t *create_ir_initializer_value(
3945                 const initializer_value_t *initializer)
3946 {
3947         if (is_type_compound(initializer->value->base.type)) {
3948                 panic("initializer creation for compounds not implemented yet");
3949         }
3950         type_t       *type = initializer->value->base.type;
3951         expression_t *expr = initializer->value;
3952         if (initializer_use_bitfield_basetype) {
3953                 type_t *skipped = skip_typeref(type);
3954                 if (skipped->kind == TYPE_BITFIELD) {
3955                         /* remove the bitfield cast... */
3956                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
3957                         expr = expr->unary.value;
3958                         type = skipped->bitfield.base_type;
3959                 }
3960         }
3961         ir_node *value = expression_to_firm(expr);
3962         ir_mode *mode  = get_ir_mode_storage(type);
3963         value          = create_conv(NULL, value, mode);
3964         return create_initializer_const(value);
3965 }
3966
3967 /** test wether type can be initialized by a string constant */
3968 static bool is_string_type(type_t *type)
3969 {
3970         type_t *inner;
3971         if (is_type_pointer(type)) {
3972                 inner = skip_typeref(type->pointer.points_to);
3973         } else if(is_type_array(type)) {
3974                 inner = skip_typeref(type->array.element_type);
3975         } else {
3976                 return false;
3977         }
3978
3979         return is_type_integer(inner);
3980 }
3981
3982 static ir_initializer_t *create_ir_initializer_list(
3983                 const initializer_list_t *initializer, type_t *type)
3984 {
3985         type_path_t path;
3986         memset(&path, 0, sizeof(path));
3987         path.top_type = type;
3988         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3989
3990         descend_into_subtype(&path);
3991
3992         for (size_t i = 0; i < initializer->len; ++i) {
3993                 const initializer_t *sub_initializer = initializer->initializers[i];
3994
3995                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3996                         walk_designator(&path, sub_initializer->designator.designator);
3997                         continue;
3998                 }
3999
4000                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4001                         /* we might have to descend into types until we're at a scalar
4002                          * type */
4003                         while(true) {
4004                                 type_t *orig_top_type = path.top_type;
4005                                 type_t *top_type      = skip_typeref(orig_top_type);
4006
4007                                 if (is_type_scalar(top_type))
4008                                         break;
4009                                 descend_into_subtype(&path);
4010                         }
4011                 } else if (sub_initializer->kind == INITIALIZER_STRING
4012                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4013                         /* we might have to descend into types until we're at a scalar
4014                          * type */
4015                         while (true) {
4016                                 type_t *orig_top_type = path.top_type;
4017                                 type_t *top_type      = skip_typeref(orig_top_type);
4018
4019                                 if (is_string_type(top_type))
4020                                         break;
4021                                 descend_into_subtype(&path);
4022                         }
4023                 }
4024
4025                 ir_initializer_t *sub_irinitializer
4026                         = create_ir_initializer(sub_initializer, path.top_type);
4027
4028                 size_t path_len = ARR_LEN(path.path);
4029                 assert(path_len >= 1);
4030                 type_path_entry_t *entry        = & path.path[path_len-1];
4031                 ir_initializer_t  *tinitializer = entry->initializer;
4032                 set_initializer_compound_value(tinitializer, entry->index,
4033                                                sub_irinitializer);
4034
4035                 advance_current_object(&path);
4036         }
4037
4038         assert(ARR_LEN(path.path) >= 1);
4039         ir_initializer_t *result = path.path[0].initializer;
4040         DEL_ARR_F(path.path);
4041
4042         return result;
4043 }
4044
4045 static ir_initializer_t *create_ir_initializer_string(
4046                 const initializer_string_t *initializer, type_t *type)
4047 {
4048         type = skip_typeref(type);
4049
4050         size_t            string_len    = initializer->string.size;
4051         assert(type->kind == TYPE_ARRAY);
4052         assert(type->array.size_constant);
4053         size_t            len           = type->array.size;
4054         ir_initializer_t *irinitializer = create_initializer_compound(len);
4055
4056         const char *string = initializer->string.begin;
4057         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4058
4059         for (size_t i = 0; i < len; ++i) {
4060                 char c = 0;
4061                 if (i < string_len)
4062                         c = string[i];
4063
4064                 tarval           *tv = new_tarval_from_long(c, mode);
4065                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4066
4067                 set_initializer_compound_value(irinitializer, i, char_initializer);
4068         }
4069
4070         return irinitializer;
4071 }
4072
4073 static ir_initializer_t *create_ir_initializer_wide_string(
4074                 const initializer_wide_string_t *initializer, type_t *type)
4075 {
4076         size_t            string_len    = initializer->string.size;
4077         assert(type->kind == TYPE_ARRAY);
4078         assert(type->array.size_constant);
4079         size_t            len           = type->array.size;
4080         ir_initializer_t *irinitializer = create_initializer_compound(len);
4081
4082         const wchar_rep_t *string = initializer->string.begin;
4083         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
4084
4085         for (size_t i = 0; i < len; ++i) {
4086                 wchar_rep_t c = 0;
4087                 if (i < string_len) {
4088                         c = string[i];
4089                 }
4090                 tarval *tv = new_tarval_from_long(c, mode);
4091                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4092
4093                 set_initializer_compound_value(irinitializer, i, char_initializer);
4094         }
4095
4096         return irinitializer;
4097 }
4098
4099 static ir_initializer_t *create_ir_initializer(
4100                 const initializer_t *initializer, type_t *type)
4101 {
4102         switch(initializer->kind) {
4103                 case INITIALIZER_STRING:
4104                         return create_ir_initializer_string(&initializer->string, type);
4105
4106                 case INITIALIZER_WIDE_STRING:
4107                         return create_ir_initializer_wide_string(&initializer->wide_string,
4108                                                                  type);
4109
4110                 case INITIALIZER_LIST:
4111                         return create_ir_initializer_list(&initializer->list, type);
4112
4113                 case INITIALIZER_VALUE:
4114                         return create_ir_initializer_value(&initializer->value);
4115
4116                 case INITIALIZER_DESIGNATOR:
4117                         panic("unexpected designator initializer found");
4118         }
4119         panic("unknown initializer");
4120 }
4121
4122 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4123                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4124 {
4125         switch(get_initializer_kind(initializer)) {
4126         case IR_INITIALIZER_NULL: {
4127                 /* NULL is undefined for dynamic initializers */
4128                 return;
4129         }
4130         case IR_INITIALIZER_CONST: {
4131                 ir_node *node     = get_initializer_const_value(initializer);
4132                 ir_mode *mode     = get_irn_mode(node);
4133                 ir_type *ent_type = get_entity_type(entity);
4134
4135                 /* is it a bitfield type? */
4136                 if (is_Primitive_type(ent_type) &&
4137                                 get_primitive_base_type(ent_type) != NULL) {
4138                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4139                         return;
4140                 }
4141
4142                 assert(get_type_mode(type) == mode);
4143                 ir_node *mem    = get_store();
4144                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4145                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4146                 set_store(proj_m);
4147                 return;
4148         }
4149         case IR_INITIALIZER_TARVAL: {
4150                 tarval  *tv       = get_initializer_tarval_value(initializer);
4151                 ir_mode *mode     = get_tarval_mode(tv);
4152                 ir_node *cnst     = new_d_Const(dbgi, tv);
4153                 ir_type *ent_type = get_entity_type(entity);
4154
4155                 /* is it a bitfield type? */
4156                 if (is_Primitive_type(ent_type) &&
4157                                 get_primitive_base_type(ent_type) != NULL) {
4158                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4159                         return;
4160                 }
4161
4162                 assert(get_type_mode(type) == mode);
4163                 ir_node *mem    = get_store();
4164                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4165                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4166                 set_store(proj_m);
4167                 return;
4168         }
4169         case IR_INITIALIZER_COMPOUND: {
4170                 assert(is_compound_type(type));
4171                 int n_members;
4172                 if (is_Array_type(type)) {
4173                         assert(has_array_upper_bound(type, 0));
4174                         n_members = get_array_upper_bound_int(type, 0);
4175                 } else {
4176                         n_members = get_compound_n_members(type);
4177                 }
4178
4179                 if (get_initializer_compound_n_entries(initializer)
4180                                 != (unsigned) n_members)
4181                         panic("initializer doesn't match compound type");
4182
4183                 for (int i = 0; i < n_members; ++i) {
4184                         ir_node   *addr;
4185                         ir_type   *irtype;
4186                         ir_entity *sub_entity;
4187                         if (is_Array_type(type)) {
4188                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4189                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4190                                 ir_node   *in[1]    = { cnst };
4191                                 irtype     = get_array_element_type(type);
4192                                 sub_entity = get_array_element_entity(type);
4193                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4194                                                        sub_entity);
4195                         } else {
4196                                 sub_entity = get_compound_member(type, i);
4197                                 irtype     = get_entity_type(sub_entity);
4198                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4199                                                              sub_entity);
4200                         }
4201
4202                         ir_initializer_t *sub_init
4203                                 = get_initializer_compound_value(initializer, i);
4204
4205                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4206                                                        addr);
4207                 }
4208                 return;
4209         }
4210         }
4211
4212         panic("invalid IR_INITIALIZER found");
4213 }
4214
4215 static void create_dynamic_initializer(ir_initializer_t *initializer,
4216                 dbg_info *dbgi, ir_entity *entity)
4217 {
4218         ir_node *frame     = get_irg_frame(current_ir_graph);
4219         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4220         ir_type *type      = get_entity_type(entity);
4221
4222         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4223 }
4224
4225 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4226                                      ir_entity *entity, type_t *type)
4227 {
4228         ir_node *memory = get_store();
4229         ir_node *nomem  = new_NoMem();
4230         ir_node *frame  = get_irg_frame(current_ir_graph);
4231         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4232
4233         if (initializer->kind == INITIALIZER_VALUE) {
4234                 initializer_value_t *initializer_value = &initializer->value;
4235
4236                 ir_node *value = expression_to_firm(initializer_value->value);
4237                 type = skip_typeref(type);
4238                 assign_value(dbgi, addr, type, value);
4239                 return;
4240         }
4241
4242         if (!is_constant_initializer(initializer)) {
4243                 bool old_initializer_use_bitfield_basetype
4244                         = initializer_use_bitfield_basetype;
4245                 initializer_use_bitfield_basetype = true;
4246                 ir_initializer_t *irinitializer
4247                         = create_ir_initializer(initializer, type);
4248                 initializer_use_bitfield_basetype
4249                         = old_initializer_use_bitfield_basetype;
4250
4251                 create_dynamic_initializer(irinitializer, dbgi, entity);
4252                 return;
4253         }
4254
4255         /* create the ir_initializer */
4256         ir_graph *const old_current_ir_graph = current_ir_graph;
4257         current_ir_graph = get_const_code_irg();
4258
4259         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4260
4261         assert(current_ir_graph == get_const_code_irg());
4262         current_ir_graph = old_current_ir_graph;
4263
4264         /* create a "template" entity which is copied to the entity on the stack */
4265         ident     *const id          = id_unique("initializer.%u");
4266         ir_type   *const irtype      = get_ir_type(type);
4267         ir_type   *const global_type = get_glob_type();
4268         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4269         set_entity_ld_ident(init_entity, id);
4270
4271         set_entity_visibility(init_entity, ir_visibility_local);
4272         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4273
4274         set_entity_initializer(init_entity, irinitializer);
4275
4276         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4277         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4278
4279         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4280         set_store(copyb_mem);
4281 }
4282
4283 static void create_initializer_local_variable_entity(entity_t *entity)
4284 {
4285         assert(entity->kind == ENTITY_VARIABLE);
4286         initializer_t *initializer = entity->variable.initializer;
4287         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4288         ir_entity     *irentity    = entity->variable.v.entity;
4289         type_t        *type        = entity->declaration.type;
4290
4291         create_local_initializer(initializer, dbgi, irentity, type);
4292 }
4293
4294 static void create_variable_initializer(entity_t *entity)
4295 {
4296         assert(entity->kind == ENTITY_VARIABLE);
4297         initializer_t *initializer = entity->variable.initializer;
4298         if (initializer == NULL)
4299                 return;
4300
4301         declaration_kind_t declaration_kind
4302                 = (declaration_kind_t) entity->declaration.kind;
4303         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4304                 create_initializer_local_variable_entity(entity);
4305                 return;
4306         }
4307
4308         type_t            *type = entity->declaration.type;
4309         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4310
4311         if (initializer->kind == INITIALIZER_VALUE) {
4312                 initializer_value_t *initializer_value = &initializer->value;
4313                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4314
4315                 ir_node *value = expression_to_firm(initializer_value->value);
4316
4317                 type_t  *type = initializer_value->value->base.type;
4318                 ir_mode *mode = get_ir_mode_storage(type);
4319                 value = create_conv(dbgi, value, mode);
4320                 value = do_strict_conv(dbgi, value);
4321
4322                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4323                         set_value(entity->variable.v.value_number, value);
4324                 } else {
4325                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4326
4327                         ir_entity *irentity = entity->variable.v.entity;
4328
4329                         if (tq & TYPE_QUALIFIER_CONST) {
4330                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4331                         }
4332                         set_atomic_ent_value(irentity, value);
4333                 }
4334         } else {
4335                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4336                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4337
4338                 ir_entity        *irentity        = entity->variable.v.entity;
4339                 ir_initializer_t *irinitializer
4340                         = create_ir_initializer(initializer, type);
4341
4342                 if (tq & TYPE_QUALIFIER_CONST) {
4343                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4344                 }
4345                 set_entity_initializer(irentity, irinitializer);
4346         }
4347 }
4348
4349 static void create_variable_length_array(entity_t *entity)
4350 {
4351         assert(entity->kind == ENTITY_VARIABLE);
4352         assert(entity->variable.initializer == NULL);
4353
4354         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4355         entity->variable.v.vla_base = NULL;
4356
4357         /* TODO: record VLA somewhere so we create the free node when we leave
4358          * it's scope */
4359 }
4360
4361 static void allocate_variable_length_array(entity_t *entity)
4362 {
4363         assert(entity->kind == ENTITY_VARIABLE);
4364         assert(entity->variable.initializer == NULL);
4365         assert(get_cur_block() != NULL);
4366
4367         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4368         type_t   *type      = entity->declaration.type;
4369         ir_type  *el_type   = get_ir_type(type->array.element_type);
4370
4371         /* make sure size_node is calculated */
4372         get_type_size_node(type);
4373         ir_node  *elems = type->array.size_node;
4374         ir_node  *mem   = get_store();
4375         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4376
4377         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4378         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4379         set_store(proj_m);
4380
4381         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4382         entity->variable.v.vla_base = addr;
4383 }
4384
4385 /**
4386  * Creates a Firm local variable from a declaration.
4387  */
4388 static void create_local_variable(entity_t *entity)
4389 {
4390         assert(entity->kind == ENTITY_VARIABLE);
4391         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4392
4393         bool needs_entity = entity->variable.address_taken;
4394         type_t *type = skip_typeref(entity->declaration.type);
4395
4396         /* is it a variable length array? */
4397         if (is_type_array(type) && !type->array.size_constant) {
4398                 create_variable_length_array(entity);
4399                 return;
4400         } else if (is_type_array(type) || is_type_compound(type)) {
4401                 needs_entity = true;
4402         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4403                 needs_entity = true;
4404         }
4405
4406         if (needs_entity) {
4407                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4408                 create_variable_entity(entity,
4409                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4410                                        frame_type);
4411         } else {
4412                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4413                 entity->variable.v.value_number = next_value_number_function;
4414                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4415                                         entity);
4416                 ++next_value_number_function;
4417         }
4418 }
4419
4420 static void create_local_static_variable(entity_t *entity)
4421 {
4422         assert(entity->kind == ENTITY_VARIABLE);
4423         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4424
4425         type_t   *type           = skip_typeref(entity->declaration.type);
4426         ir_type  *const var_type = entity->variable.thread_local ?
4427                 get_tls_type() : get_glob_type();
4428         ir_type  *const irtype   = get_ir_type(type);
4429         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4430
4431         size_t l = strlen(entity->base.symbol->string);
4432         char   buf[l + sizeof(".%u")];
4433         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4434         ident     *const id = id_unique(buf);
4435
4436         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4437
4438         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4439                 set_entity_volatility(irentity, volatility_is_volatile);
4440         }
4441
4442         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4443         entity->variable.v.entity = irentity;
4444
4445         set_entity_ld_ident(irentity, id);
4446         set_entity_visibility(irentity, ir_visibility_local);
4447
4448         ir_graph *const old_current_ir_graph = current_ir_graph;
4449         current_ir_graph = get_const_code_irg();
4450
4451         create_variable_initializer(entity);
4452
4453         assert(current_ir_graph == get_const_code_irg());
4454         current_ir_graph = old_current_ir_graph;
4455 }
4456
4457
4458
4459 static void return_statement_to_firm(return_statement_t *statement)
4460 {
4461         if (get_cur_block() == NULL)
4462                 return;
4463
4464         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4465         type_t   *type        = current_function_entity->declaration.type;
4466         ir_type  *func_irtype = get_ir_type(type);
4467
4468
4469         ir_node *in[1];
4470         int      in_len;
4471         if (get_method_n_ress(func_irtype) > 0) {
4472                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4473
4474                 if (statement->value != NULL) {
4475                         ir_node *node = expression_to_firm(statement->value);
4476                         if (!is_compound_type(res_type)) {
4477                                 type_t  *type = statement->value->base.type;
4478                                 ir_mode *mode = get_ir_mode_storage(type);
4479                                 node          = create_conv(dbgi, node, mode);
4480                                 node          = do_strict_conv(dbgi, node);
4481                         }
4482                         in[0] = node;
4483                 } else {
4484                         ir_mode *mode;
4485                         if (is_compound_type(res_type)) {
4486                                 mode = mode_P_data;
4487                         } else {
4488                                 mode = get_type_mode(res_type);
4489                         }
4490                         in[0] = new_Unknown(mode);
4491                 }
4492                 in_len = 1;
4493         } else {
4494                 /* build return_value for its side effects */
4495                 if (statement->value != NULL) {
4496                         expression_to_firm(statement->value);
4497                 }
4498                 in_len = 0;
4499         }
4500
4501         ir_node  *store = get_store();
4502         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4503
4504         ir_node *end_block = get_irg_end_block(current_ir_graph);
4505         add_immBlock_pred(end_block, ret);
4506
4507         set_cur_block(NULL);
4508 }
4509
4510 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4511 {
4512         if (get_cur_block() == NULL)
4513                 return NULL;
4514
4515         return expression_to_firm(statement->expression);
4516 }
4517
4518 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4519 {
4520         entity_t *entity = compound->scope.entities;
4521         for ( ; entity != NULL; entity = entity->base.next) {
4522                 if (!is_declaration(entity))
4523                         continue;
4524
4525                 create_local_declaration(entity);
4526         }
4527
4528         ir_node     *result    = NULL;
4529         statement_t *statement = compound->statements;
4530         for ( ; statement != NULL; statement = statement->base.next) {
4531                 if (statement->base.next == NULL
4532                                 && statement->kind == STATEMENT_EXPRESSION) {
4533                         result = expression_statement_to_firm(
4534                                         &statement->expression);
4535                         break;
4536                 }
4537                 statement_to_firm(statement);
4538         }
4539
4540         return result;
4541 }
4542
4543 static void create_global_variable(entity_t *entity)
4544 {
4545         ir_linkage    linkage    = 0;
4546         ir_visibility visibility = ir_visibility_default;
4547         ir_entity    *irentity;
4548         assert(entity->kind == ENTITY_VARIABLE);
4549
4550         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4551         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4552         case STORAGE_CLASS_STATIC:
4553                 visibility = ir_visibility_local;
4554                 /* uninitialized globals get merged in C */
4555                 if (entity->variable.initializer == NULL)
4556                         linkage |= IR_LINKAGE_MERGE;
4557                 break;
4558         case STORAGE_CLASS_NONE:
4559                 visibility = ir_visibility_default;
4560                 /* uninitialized globals get merged in C */
4561                 if (entity->variable.initializer == NULL)
4562                         linkage |= IR_LINKAGE_MERGE;
4563                 break;
4564         case STORAGE_CLASS_TYPEDEF:
4565         case STORAGE_CLASS_AUTO:
4566         case STORAGE_CLASS_REGISTER:
4567                 panic("invalid storage class for global var");
4568         }
4569
4570         ir_type *var_type = get_glob_type();
4571         if (entity->variable.thread_local) {
4572                 var_type = get_tls_type();
4573                 /* LINKAGE_MERGE not supported by current linkers */
4574                 linkage &= ~IR_LINKAGE_MERGE;
4575         }
4576         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4577         irentity = entity->variable.v.entity;
4578         add_entity_linkage(irentity, linkage);
4579         set_entity_visibility(irentity, visibility);
4580 }
4581
4582 static void create_local_declaration(entity_t *entity)
4583 {
4584         assert(is_declaration(entity));
4585
4586         /* construct type */
4587         (void) get_ir_type(entity->declaration.type);
4588         if (entity->base.symbol == NULL) {
4589                 return;
4590         }
4591
4592         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4593         case STORAGE_CLASS_STATIC:
4594                 if (entity->kind == ENTITY_FUNCTION) {
4595                         (void)get_function_entity(entity, NULL);
4596                 } else {
4597                         create_local_static_variable(entity);
4598                 }
4599                 return;
4600         case STORAGE_CLASS_EXTERN:
4601                 if (entity->kind == ENTITY_FUNCTION) {
4602                         assert(entity->function.statement == NULL);
4603                         (void)get_function_entity(entity, NULL);
4604                 } else {
4605                         create_global_variable(entity);
4606                         create_variable_initializer(entity);
4607                 }
4608                 return;
4609         case STORAGE_CLASS_NONE:
4610         case STORAGE_CLASS_AUTO:
4611         case STORAGE_CLASS_REGISTER:
4612                 if (entity->kind == ENTITY_FUNCTION) {
4613                         if (entity->function.statement != NULL) {
4614                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4615                                 (void)get_function_entity(entity, owner);
4616                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4617                                 enqueue_inner_function(entity);
4618                         } else {
4619                                 (void)get_function_entity(entity, NULL);
4620                         }
4621                 } else {
4622                         create_local_variable(entity);
4623                 }
4624                 return;
4625         case STORAGE_CLASS_TYPEDEF:
4626                 break;
4627         }
4628         panic("invalid storage class found");
4629 }
4630
4631 static void initialize_local_declaration(entity_t *entity)
4632 {
4633         if (entity->base.symbol == NULL)
4634                 return;
4635
4636         // no need to emit code in dead blocks
4637         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4638                         && get_cur_block() == NULL)
4639                 return;
4640
4641         switch ((declaration_kind_t) entity->declaration.kind) {
4642         case DECLARATION_KIND_LOCAL_VARIABLE:
4643         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4644                 create_variable_initializer(entity);
4645                 return;
4646
4647         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4648                 allocate_variable_length_array(entity);
4649                 return;
4650
4651         case DECLARATION_KIND_COMPOUND_MEMBER:
4652         case DECLARATION_KIND_GLOBAL_VARIABLE:
4653         case DECLARATION_KIND_FUNCTION:
4654         case DECLARATION_KIND_INNER_FUNCTION:
4655                 return;
4656
4657         case DECLARATION_KIND_PARAMETER:
4658         case DECLARATION_KIND_PARAMETER_ENTITY:
4659                 panic("can't initialize parameters");
4660
4661         case DECLARATION_KIND_UNKNOWN:
4662                 panic("can't initialize unknown declaration");
4663         }
4664         panic("invalid declaration kind");
4665 }
4666
4667 static void declaration_statement_to_firm(declaration_statement_t *statement)
4668 {
4669         entity_t *entity = statement->declarations_begin;
4670         if (entity == NULL)
4671                 return;
4672
4673         entity_t *const last = statement->declarations_end;
4674         for ( ;; entity = entity->base.next) {
4675                 if (is_declaration(entity)) {
4676                         initialize_local_declaration(entity);
4677                 } else if (entity->kind == ENTITY_TYPEDEF) {
4678                         /* §6.7.7:3  Any array size expressions associated with variable length
4679                          * array declarators are evaluated each time the declaration of the
4680                          * typedef name is reached in the order of execution. */
4681                         type_t *const type = skip_typeref(entity->typedefe.type);
4682                         if (is_type_array(type) && type->array.is_vla)
4683                                 get_vla_size(&type->array);
4684                 }
4685                 if (entity == last)
4686                         break;
4687         }
4688 }
4689
4690 static void if_statement_to_firm(if_statement_t *statement)
4691 {
4692         ir_node *cur_block = get_cur_block();
4693
4694         ir_node *fallthrough_block = NULL;
4695
4696         /* the true (blocks) */
4697         ir_node *true_block = NULL;
4698         if (statement->true_statement != NULL) {
4699                 true_block = new_immBlock();
4700                 set_cur_block(true_block);
4701                 statement_to_firm(statement->true_statement);
4702                 if (get_cur_block() != NULL) {
4703                         ir_node *jmp = new_Jmp();
4704                         if (fallthrough_block == NULL)
4705                                 fallthrough_block = new_immBlock();
4706                         add_immBlock_pred(fallthrough_block, jmp);
4707                 }
4708         }
4709
4710         /* the false (blocks) */
4711         ir_node *false_block = NULL;
4712         if (statement->false_statement != NULL) {
4713                 false_block = new_immBlock();
4714                 set_cur_block(false_block);
4715
4716                 statement_to_firm(statement->false_statement);
4717                 if (get_cur_block() != NULL) {
4718                         ir_node *jmp = new_Jmp();
4719                         if (fallthrough_block == NULL)
4720                                 fallthrough_block = new_immBlock();
4721                         add_immBlock_pred(fallthrough_block, jmp);
4722                 }
4723         }
4724
4725         /* create the condition */
4726         if (cur_block != NULL) {
4727                 if (true_block == NULL || false_block == NULL) {
4728                         if (fallthrough_block == NULL)
4729                                 fallthrough_block = new_immBlock();
4730                         if (true_block == NULL)
4731                                 true_block = fallthrough_block;
4732                         if (false_block == NULL)
4733                                 false_block = fallthrough_block;
4734                 }
4735
4736                 set_cur_block(cur_block);
4737                 create_condition_evaluation(statement->condition, true_block,
4738                                             false_block);
4739         }
4740
4741         mature_immBlock(true_block);
4742         if (false_block != fallthrough_block && false_block != NULL) {
4743                 mature_immBlock(false_block);
4744         }
4745         if (fallthrough_block != NULL) {
4746                 mature_immBlock(fallthrough_block);
4747         }
4748
4749         set_cur_block(fallthrough_block);
4750 }
4751
4752 static void while_statement_to_firm(while_statement_t *statement)
4753 {
4754         ir_node *jmp = NULL;
4755         if (get_cur_block() != NULL) {
4756                 jmp = new_Jmp();
4757         }
4758
4759         /* create the header block */
4760         ir_node *header_block = new_immBlock();
4761         if (jmp != NULL) {
4762                 add_immBlock_pred(header_block, jmp);
4763         }
4764
4765         /* the loop body */
4766         ir_node *old_continue_label = continue_label;
4767         ir_node *old_break_label    = break_label;
4768         continue_label              = header_block;
4769         break_label                 = NULL;
4770
4771         ir_node *body_block = new_immBlock();
4772         set_cur_block(body_block);
4773         statement_to_firm(statement->body);
4774         ir_node *false_block = break_label;
4775
4776         assert(continue_label == header_block);
4777         continue_label = old_continue_label;
4778         break_label    = old_break_label;
4779
4780         if (get_cur_block() != NULL) {
4781                 jmp = new_Jmp();
4782                 add_immBlock_pred(header_block, jmp);
4783         }
4784
4785         /* shortcut for while(true) */
4786         if (is_constant_expression(statement->condition)
4787                         && fold_constant_to_bool(statement->condition) != 0) {
4788                 set_cur_block(header_block);
4789                 ir_node *header_jmp = new_Jmp();
4790                 add_immBlock_pred(body_block, header_jmp);
4791
4792                 keep_alive(body_block);
4793                 keep_all_memory(body_block);
4794                 set_cur_block(body_block);
4795         } else {
4796                 if (false_block == NULL) {
4797                         false_block = new_immBlock();
4798                 }
4799
4800                 /* create the condition */
4801                 set_cur_block(header_block);
4802
4803                 create_condition_evaluation(statement->condition, body_block,
4804                                             false_block);
4805         }
4806
4807         mature_immBlock(body_block);
4808         mature_immBlock(header_block);
4809         if (false_block != NULL) {
4810                 mature_immBlock(false_block);
4811         }
4812
4813         set_cur_block(false_block);
4814 }
4815
4816 static void do_while_statement_to_firm(do_while_statement_t *statement)
4817 {
4818         ir_node *jmp = NULL;
4819         if (get_cur_block() != NULL) {
4820                 jmp = new_Jmp();
4821         }
4822
4823         /* create the header block */
4824         ir_node *header_block = new_immBlock();
4825
4826         /* the loop body */
4827         ir_node *body_block = new_immBlock();
4828         if (jmp != NULL) {
4829                 add_immBlock_pred(body_block, jmp);
4830         }
4831
4832         ir_node *old_continue_label = continue_label;
4833         ir_node *old_break_label    = break_label;
4834         continue_label              = header_block;
4835         break_label                 = NULL;
4836
4837         set_cur_block(body_block);
4838         statement_to_firm(statement->body);
4839         ir_node *false_block = break_label;
4840
4841         assert(continue_label == header_block);
4842         continue_label = old_continue_label;
4843         break_label    = old_break_label;
4844
4845         if (get_cur_block() != NULL) {
4846                 ir_node *body_jmp = new_Jmp();
4847                 add_immBlock_pred(header_block, body_jmp);
4848                 mature_immBlock(header_block);
4849         }
4850
4851         if (false_block == NULL) {
4852                 false_block = new_immBlock();
4853         }
4854
4855         /* create the condition */
4856         set_cur_block(header_block);
4857
4858         create_condition_evaluation(statement->condition, body_block, false_block);
4859         mature_immBlock(body_block);
4860         mature_immBlock(header_block);
4861         mature_immBlock(false_block);
4862
4863         set_cur_block(false_block);
4864 }
4865
4866 static void for_statement_to_firm(for_statement_t *statement)
4867 {
4868         ir_node *jmp = NULL;
4869
4870         /* create declarations */
4871         entity_t *entity = statement->scope.entities;
4872         for ( ; entity != NULL; entity = entity->base.next) {
4873                 if (!is_declaration(entity))
4874                         continue;
4875
4876                 create_local_declaration(entity);
4877         }
4878
4879         if (get_cur_block() != NULL) {
4880                 entity = statement->scope.entities;
4881                 for ( ; entity != NULL; entity = entity->base.next) {
4882                         if (!is_declaration(entity))
4883                                 continue;
4884
4885                         initialize_local_declaration(entity);
4886                 }
4887
4888                 if (statement->initialisation != NULL) {
4889                         expression_to_firm(statement->initialisation);
4890                 }
4891
4892                 jmp = new_Jmp();
4893         }
4894
4895
4896         /* create the step block */
4897         ir_node *const step_block = new_immBlock();
4898         set_cur_block(step_block);
4899         if (statement->step != NULL) {
4900                 expression_to_firm(statement->step);
4901         }
4902         ir_node *const step_jmp = new_Jmp();
4903
4904         /* create the header block */
4905         ir_node *const header_block = new_immBlock();
4906         set_cur_block(header_block);
4907         if (jmp != NULL) {
4908                 add_immBlock_pred(header_block, jmp);
4909         }
4910         add_immBlock_pred(header_block, step_jmp);
4911
4912         /* the false block */
4913         ir_node *const false_block = new_immBlock();
4914
4915         /* the loop body */
4916         ir_node *body_block;
4917         if (statement->body != NULL) {
4918                 ir_node *const old_continue_label = continue_label;
4919                 ir_node *const old_break_label    = break_label;
4920                 continue_label = step_block;
4921                 break_label    = false_block;
4922
4923                 body_block = new_immBlock();
4924                 set_cur_block(body_block);
4925                 statement_to_firm(statement->body);
4926
4927                 assert(continue_label == step_block);
4928                 assert(break_label    == false_block);
4929                 continue_label = old_continue_label;
4930                 break_label    = old_break_label;
4931
4932                 if (get_cur_block() != NULL) {
4933                         jmp = new_Jmp();
4934                         add_immBlock_pred(step_block, jmp);
4935                 }
4936         } else {
4937                 body_block = step_block;
4938         }
4939
4940         /* create the condition */
4941         set_cur_block(header_block);
4942         if (statement->condition != NULL) {
4943                 create_condition_evaluation(statement->condition, body_block,
4944                                             false_block);
4945         } else {
4946                 keep_alive(header_block);
4947                 keep_all_memory(header_block);
4948                 jmp = new_Jmp();
4949                 add_immBlock_pred(body_block, jmp);
4950         }
4951
4952         mature_immBlock(body_block);
4953         mature_immBlock(false_block);
4954         mature_immBlock(step_block);
4955         mature_immBlock(header_block);
4956         mature_immBlock(false_block);
4957
4958         set_cur_block(false_block);
4959 }
4960
4961 static void create_jump_statement(const statement_t *statement,
4962                                   ir_node *target_block)
4963 {
4964         if (get_cur_block() == NULL)
4965                 return;
4966
4967         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4968         ir_node  *jump = new_d_Jmp(dbgi);
4969         add_immBlock_pred(target_block, jump);
4970
4971         set_cur_block(NULL);
4972 }
4973
4974 static ir_node *get_break_label(void)
4975 {
4976         if (break_label == NULL) {
4977                 break_label = new_immBlock();
4978         }
4979         return break_label;
4980 }
4981
4982 static void switch_statement_to_firm(switch_statement_t *statement)
4983 {
4984         ir_node  *first_block = NULL;
4985         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4986         ir_node  *cond        = NULL;
4987
4988         if (get_cur_block() != NULL) {
4989                 ir_node *expression = expression_to_firm(statement->expression);
4990                 cond                = new_d_Cond(dbgi, expression);
4991                 first_block         = get_cur_block();
4992         }
4993
4994         set_cur_block(NULL);
4995
4996         ir_node *const old_switch_cond       = current_switch_cond;
4997         ir_node *const old_break_label       = break_label;
4998         const bool     old_saw_default_label = saw_default_label;
4999         saw_default_label                    = false;
5000         current_switch_cond                  = cond;
5001         break_label                          = NULL;
5002         switch_statement_t *const old_switch = current_switch;
5003         current_switch                       = statement;
5004
5005         /* determine a free number for the default label */
5006         unsigned long num_cases = 0;
5007         long def_nr = 0;
5008         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5009                 if (l->expression == NULL) {
5010                         /* default case */
5011                         continue;
5012                 }
5013                 if (l->last_case >= l->first_case)
5014                         num_cases += l->last_case - l->first_case + 1;
5015                 if (l->last_case > def_nr)
5016                         def_nr = l->last_case;
5017         }
5018
5019         if (def_nr == INT_MAX) {
5020                 /* Bad: an overflow will occur, we cannot be sure that the
5021                  * maximum + 1 is a free number. Scan the values a second
5022                  * time to find a free number.
5023                  */
5024                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5025
5026                 memset(bits, 0, (num_cases + 7) >> 3);
5027                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5028                         if (l->expression == NULL) {
5029                                 /* default case */
5030                                 continue;
5031                         }
5032                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5033                         if (start < num_cases && l->last_case >= 0) {
5034                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5035                                         (unsigned long)l->last_case : num_cases - 1;
5036                                 for (unsigned long cns = start; cns <= end; ++cns) {
5037                                         bits[cns >> 3] |= (1 << (cns & 7));
5038                                 }
5039                         }
5040                 }
5041                 /* We look at the first num_cases constants:
5042                  * Either they are dense, so we took the last (num_cases)
5043                  * one, or they are not dense, so we will find one free
5044                  * there...
5045                  */
5046                 unsigned long i;
5047                 for (i = 0; i < num_cases; ++i)
5048                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5049                                 break;
5050
5051                 free(bits);
5052                 def_nr = i;
5053         } else {
5054                 ++def_nr;
5055         }
5056         statement->default_proj_nr = def_nr;
5057
5058         if (statement->body != NULL) {
5059                 statement_to_firm(statement->body);
5060         }
5061
5062         if (get_cur_block() != NULL) {
5063                 ir_node *jmp = new_Jmp();
5064                 add_immBlock_pred(get_break_label(), jmp);
5065         }
5066
5067         if (!saw_default_label && first_block != NULL) {
5068                 set_cur_block(first_block);
5069                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
5070                                                         statement->default_proj_nr);
5071                 add_immBlock_pred(get_break_label(), proj);
5072         }
5073
5074         if (break_label != NULL) {
5075                 mature_immBlock(break_label);
5076         }
5077         set_cur_block(break_label);
5078
5079         assert(current_switch_cond == cond);
5080         current_switch      = old_switch;
5081         current_switch_cond = old_switch_cond;
5082         break_label         = old_break_label;
5083         saw_default_label   = old_saw_default_label;
5084 }
5085
5086 static void case_label_to_firm(const case_label_statement_t *statement)
5087 {
5088         if (statement->is_empty_range)
5089                 return;
5090
5091         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5092
5093         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5094
5095         ir_node *proj;
5096         ir_node *block = new_immBlock();
5097
5098         if (current_switch_cond != NULL) {
5099                 set_cur_block(get_nodes_block(current_switch_cond));
5100                 if (statement->expression != NULL) {
5101                         long pn     = statement->first_case;
5102                         long end_pn = statement->last_case;
5103                         assert(pn <= end_pn);
5104                         /* create jumps for all cases in the given range */
5105                         do {
5106                                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5107                                 add_immBlock_pred(block, proj);
5108                         } while (pn++ < end_pn);
5109                 } else {
5110                         saw_default_label = true;
5111                         proj = new_d_defaultProj(dbgi, current_switch_cond,
5112                                                                          current_switch->default_proj_nr);
5113
5114                         add_immBlock_pred(block, proj);
5115                 }
5116         }
5117
5118         if (fallthrough != NULL) {
5119                 add_immBlock_pred(block, fallthrough);
5120         }
5121         mature_immBlock(block);
5122         set_cur_block(block);
5123
5124         if (statement->statement != NULL) {
5125                 statement_to_firm(statement->statement);
5126         }
5127 }
5128
5129 static void label_to_firm(const label_statement_t *statement)
5130 {
5131         ir_node *block = get_label_block(statement->label);
5132
5133         if (get_cur_block() != NULL) {
5134                 ir_node *jmp = new_Jmp();
5135                 add_immBlock_pred(block, jmp);
5136         }
5137
5138         set_cur_block(block);
5139         keep_alive(block);
5140         keep_all_memory(block);
5141
5142         if (statement->statement != NULL) {
5143                 statement_to_firm(statement->statement);
5144         }
5145 }
5146
5147 static void goto_to_firm(const goto_statement_t *statement)
5148 {
5149         if (get_cur_block() == NULL)
5150                 return;
5151
5152         if (statement->expression) {
5153                 ir_node  *irn  = expression_to_firm(statement->expression);
5154                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5155                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5156
5157                 set_irn_link(ijmp, ijmp_list);
5158                 ijmp_list = ijmp;
5159         } else {
5160                 ir_node *block = get_label_block(statement->label);
5161                 ir_node *jmp   = new_Jmp();
5162                 add_immBlock_pred(block, jmp);
5163         }
5164         set_cur_block(NULL);
5165 }
5166
5167 static void asm_statement_to_firm(const asm_statement_t *statement)
5168 {
5169         bool needs_memory = false;
5170
5171         if (statement->is_volatile) {
5172                 needs_memory = true;
5173         }
5174
5175         size_t         n_clobbers = 0;
5176         asm_clobber_t *clobber    = statement->clobbers;
5177         for ( ; clobber != NULL; clobber = clobber->next) {
5178                 const char *clobber_str = clobber->clobber.begin;
5179
5180                 if (!be_is_valid_clobber(clobber_str)) {
5181                         errorf(&statement->base.source_position,
5182                                    "invalid clobber '%s' specified", clobber->clobber);
5183                         continue;
5184                 }
5185
5186                 if (strcmp(clobber_str, "memory") == 0) {
5187                         needs_memory = true;
5188                         continue;
5189                 }
5190
5191                 ident *id = new_id_from_str(clobber_str);
5192                 obstack_ptr_grow(&asm_obst, id);
5193                 ++n_clobbers;
5194         }
5195         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5196         ident **clobbers = NULL;
5197         if (n_clobbers > 0) {
5198                 clobbers = obstack_finish(&asm_obst);
5199         }
5200
5201         size_t n_inputs  = 0;
5202         asm_argument_t *argument = statement->inputs;
5203         for ( ; argument != NULL; argument = argument->next)
5204                 n_inputs++;
5205         size_t n_outputs = 0;
5206         argument = statement->outputs;
5207         for ( ; argument != NULL; argument = argument->next)
5208                 n_outputs++;
5209
5210         unsigned next_pos = 0;
5211
5212         ir_node *ins[n_inputs + n_outputs + 1];
5213         size_t   in_size = 0;
5214
5215         ir_asm_constraint tmp_in_constraints[n_outputs];
5216
5217         const expression_t *out_exprs[n_outputs];
5218         ir_node            *out_addrs[n_outputs];
5219         size_t              out_size = 0;
5220
5221         argument = statement->outputs;
5222         for ( ; argument != NULL; argument = argument->next) {
5223                 const char *constraints = argument->constraints.begin;
5224                 asm_constraint_flags_t asm_flags
5225                         = be_parse_asm_constraints(constraints);
5226
5227                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5228                         warningf(&statement->base.source_position,
5229                                "some constraints in '%s' are not supported", constraints);
5230                 }
5231                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5232                         errorf(&statement->base.source_position,
5233                                "some constraints in '%s' are invalid", constraints);
5234                         continue;
5235                 }
5236                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5237                         errorf(&statement->base.source_position,
5238                                "no write flag specified for output constraints '%s'",
5239                                constraints);
5240                         continue;
5241                 }
5242
5243                 unsigned pos = next_pos++;
5244                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5245                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5246                         expression_t *expr = argument->expression;
5247                         ir_node      *addr = expression_to_addr(expr);
5248                         /* in+output, construct an artifical same_as constraint on the
5249                          * input */
5250                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5251                                 char     buf[64];
5252                                 ir_node *value = get_value_from_lvalue(expr, addr);
5253
5254                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5255
5256                                 ir_asm_constraint constraint;
5257                                 constraint.pos              = pos;
5258                                 constraint.constraint       = new_id_from_str(buf);
5259                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5260                                 tmp_in_constraints[in_size] = constraint;
5261                                 ins[in_size] = value;
5262
5263                                 ++in_size;
5264                         }
5265
5266                         out_exprs[out_size] = expr;
5267                         out_addrs[out_size] = addr;
5268                         ++out_size;
5269                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5270                         /* pure memory ops need no input (but we have to make sure we
5271                          * attach to the memory) */
5272                         assert(! (asm_flags &
5273                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5274                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5275                         needs_memory = true;
5276
5277                         /* we need to attach the address to the inputs */
5278                         expression_t *expr = argument->expression;
5279
5280                         ir_asm_constraint constraint;
5281                         constraint.pos              = pos;
5282                         constraint.constraint       = new_id_from_str(constraints);
5283                         constraint.mode             = NULL;
5284                         tmp_in_constraints[in_size] = constraint;
5285
5286                         ins[in_size]          = expression_to_addr(expr);
5287                         ++in_size;
5288                         continue;
5289                 } else {
5290                         errorf(&statement->base.source_position,
5291                                "only modifiers but no place set in constraints '%s'",
5292                                constraints);
5293                         continue;
5294                 }
5295
5296                 ir_asm_constraint constraint;
5297                 constraint.pos        = pos;
5298                 constraint.constraint = new_id_from_str(constraints);
5299                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5300
5301                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5302         }
5303         assert(obstack_object_size(&asm_obst)
5304                         == out_size * sizeof(ir_asm_constraint));
5305         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5306
5307
5308         obstack_grow(&asm_obst, tmp_in_constraints,
5309                      in_size * sizeof(tmp_in_constraints[0]));
5310         /* find and count input and output arguments */
5311         argument = statement->inputs;
5312         for ( ; argument != NULL; argument = argument->next) {
5313                 const char *constraints = argument->constraints.begin;
5314                 asm_constraint_flags_t asm_flags
5315                         = be_parse_asm_constraints(constraints);
5316
5317                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5318                         errorf(&statement->base.source_position,
5319                                "some constraints in '%s' are not supported", constraints);
5320                         continue;
5321                 }
5322                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5323                         errorf(&statement->base.source_position,
5324                                "some constraints in '%s' are invalid", constraints);
5325                         continue;
5326                 }
5327                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5328                         errorf(&statement->base.source_position,
5329                                "write flag specified for input constraints '%s'",
5330                                constraints);
5331                         continue;
5332                 }
5333
5334                 ir_node *input;
5335                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5336                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5337                         /* we can treat this as "normal" input */
5338                         input = expression_to_firm(argument->expression);
5339                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5340                         /* pure memory ops need no input (but we have to make sure we
5341                          * attach to the memory) */
5342                         assert(! (asm_flags &
5343                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5344                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5345                         needs_memory = true;
5346                         input = expression_to_addr(argument->expression);
5347                 } else {
5348                         errorf(&statement->base.source_position,
5349                                "only modifiers but no place set in constraints '%s'",
5350                                constraints);
5351                         continue;
5352                 }
5353
5354                 ir_asm_constraint constraint;
5355                 constraint.pos        = next_pos++;
5356                 constraint.constraint = new_id_from_str(constraints);
5357                 constraint.mode       = get_irn_mode(input);
5358
5359                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5360                 ins[in_size++] = input;
5361         }
5362
5363         if (needs_memory) {
5364                 ir_asm_constraint constraint;
5365                 constraint.pos        = next_pos++;
5366                 constraint.constraint = new_id_from_str("");
5367                 constraint.mode       = mode_M;
5368
5369                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5370                 ins[in_size++] = get_store();
5371         }
5372
5373         assert(obstack_object_size(&asm_obst)
5374                         == in_size * sizeof(ir_asm_constraint));
5375         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5376
5377         /* create asm node */
5378         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5379
5380         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5381
5382         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5383                                   out_size, output_constraints,
5384                                   n_clobbers, clobbers, asm_text);
5385
5386         if (statement->is_volatile) {
5387                 set_irn_pinned(node, op_pin_state_pinned);
5388         } else {
5389                 set_irn_pinned(node, op_pin_state_floats);
5390         }
5391
5392         /* create output projs & connect them */
5393         if (needs_memory) {
5394                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5395                 set_store(projm);
5396         }
5397
5398         size_t i;
5399         for (i = 0; i < out_size; ++i) {
5400                 const expression_t *out_expr = out_exprs[i];
5401                 long                pn       = i;
5402                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5403                 ir_node            *proj     = new_Proj(node, mode, pn);
5404                 ir_node            *addr     = out_addrs[i];
5405
5406                 set_value_for_expression_addr(out_expr, proj, addr);
5407         }
5408 }
5409
5410 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5411 {
5412         statement_to_firm(statement->try_statement);
5413         warningf(&statement->base.source_position, "structured exception handling ignored");
5414 }
5415
5416 static void     leave_statement_to_firm(leave_statement_t *statement)
5417 {
5418         errorf(&statement->base.source_position, "__leave not supported yet");
5419 }
5420
5421 /**
5422  * Transform a statement.
5423  */
5424 static void statement_to_firm(statement_t *statement)
5425 {
5426 #ifndef NDEBUG
5427         assert(!statement->base.transformed);
5428         statement->base.transformed = true;
5429 #endif
5430
5431         switch (statement->kind) {
5432         case STATEMENT_INVALID:
5433                 panic("invalid statement found");
5434         case STATEMENT_EMPTY:
5435                 /* nothing */
5436                 return;
5437         case STATEMENT_COMPOUND:
5438                 compound_statement_to_firm(&statement->compound);
5439                 return;
5440         case STATEMENT_RETURN:
5441                 return_statement_to_firm(&statement->returns);
5442                 return;
5443         case STATEMENT_EXPRESSION:
5444                 expression_statement_to_firm(&statement->expression);
5445                 return;
5446         case STATEMENT_IF:
5447                 if_statement_to_firm(&statement->ifs);
5448                 return;
5449         case STATEMENT_WHILE:
5450                 while_statement_to_firm(&statement->whiles);
5451                 return;
5452         case STATEMENT_DO_WHILE:
5453                 do_while_statement_to_firm(&statement->do_while);
5454                 return;
5455         case STATEMENT_DECLARATION:
5456                 declaration_statement_to_firm(&statement->declaration);
5457                 return;
5458         case STATEMENT_BREAK:
5459                 create_jump_statement(statement, get_break_label());
5460                 return;
5461         case STATEMENT_CONTINUE:
5462                 create_jump_statement(statement, continue_label);
5463                 return;
5464         case STATEMENT_SWITCH:
5465                 switch_statement_to_firm(&statement->switchs);
5466                 return;
5467         case STATEMENT_CASE_LABEL:
5468                 case_label_to_firm(&statement->case_label);
5469                 return;
5470         case STATEMENT_FOR:
5471                 for_statement_to_firm(&statement->fors);
5472                 return;
5473         case STATEMENT_LABEL:
5474                 label_to_firm(&statement->label);
5475                 return;
5476         case STATEMENT_GOTO:
5477                 goto_to_firm(&statement->gotos);
5478                 return;
5479         case STATEMENT_ASM:
5480                 asm_statement_to_firm(&statement->asms);
5481                 return;
5482         case STATEMENT_MS_TRY:
5483                 ms_try_statement_to_firm(&statement->ms_try);
5484                 return;
5485         case STATEMENT_LEAVE:
5486                 leave_statement_to_firm(&statement->leave);
5487                 return;
5488         }
5489         panic("statement not implemented");
5490 }
5491
5492 static int count_local_variables(const entity_t *entity,
5493                                  const entity_t *const last)
5494 {
5495         int count = 0;
5496         entity_t const *const end = last != NULL ? last->base.next : NULL;
5497         for (; entity != end; entity = entity->base.next) {
5498                 type_t *type;
5499                 bool    address_taken;
5500
5501                 if (entity->kind == ENTITY_VARIABLE) {
5502                         type          = skip_typeref(entity->declaration.type);
5503                         address_taken = entity->variable.address_taken;
5504                 } else if (entity->kind == ENTITY_PARAMETER) {
5505                         type          = skip_typeref(entity->declaration.type);
5506                         address_taken = entity->parameter.address_taken;
5507                 } else {
5508                         continue;
5509                 }
5510
5511                 if (!address_taken && is_type_scalar(type))
5512                         ++count;
5513         }
5514         return count;
5515 }
5516
5517 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5518 {
5519         int *const count = env;
5520
5521         switch (stmt->kind) {
5522         case STATEMENT_DECLARATION: {
5523                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5524                 *count += count_local_variables(decl_stmt->declarations_begin,
5525                                 decl_stmt->declarations_end);
5526                 break;
5527         }
5528
5529         case STATEMENT_FOR:
5530                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5531                 break;
5532
5533         default:
5534                 break;
5535         }
5536 }
5537
5538 /**
5539  * Return the number of local (alias free) variables used by a function.
5540  */
5541 static int get_function_n_local_vars(entity_t *entity)
5542 {
5543         const function_t *function = &entity->function;
5544         int count = 0;
5545
5546         /* count parameters */
5547         count += count_local_variables(function->parameters.entities, NULL);
5548
5549         /* count local variables declared in body */
5550         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5551         return count;
5552 }
5553
5554 /**
5555  * Build Firm code for the parameters of a function.
5556  */
5557 static void initialize_function_parameters(entity_t *entity)
5558 {
5559         assert(entity->kind == ENTITY_FUNCTION);
5560         ir_graph *irg             = current_ir_graph;
5561         ir_node  *args            = get_irg_args(irg);
5562         ir_node  *start_block     = get_irg_start_block(irg);
5563         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5564         int      first_param_nr   = 0;
5565
5566         if (entity->function.need_closure) {
5567                 /* add an extra parameter for the static link */
5568                 entity->function.static_link = new_r_Proj(start_block, args, mode_P_data, 0);
5569                 ++first_param_nr;
5570         }
5571
5572         int       n         = 0;
5573         entity_t *parameter = entity->function.parameters.entities;
5574         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5575                 if (parameter->kind != ENTITY_PARAMETER)
5576                         continue;
5577
5578                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5579                 type_t *type = skip_typeref(parameter->declaration.type);
5580
5581                 bool needs_entity = parameter->parameter.address_taken;
5582                 assert(!is_type_array(type));
5583                 if (is_type_compound(type)) {
5584                         needs_entity = true;
5585                 }
5586
5587                 if (needs_entity) {
5588                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5589                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5590                         set_entity_ident(entity, id);
5591
5592                         parameter->declaration.kind
5593                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5594                         parameter->parameter.v.entity = entity;
5595                         continue;
5596                 }
5597
5598                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5599                 ir_mode *param_mode   = get_type_mode(param_irtype);
5600
5601                 long     pn    = n + first_param_nr;
5602                 ir_node *value = new_r_Proj(start_block, args, param_mode, pn);
5603
5604                 ir_mode *mode = get_ir_mode_storage(type);
5605                 value = create_conv(NULL, value, mode);
5606                 value = do_strict_conv(NULL, value);
5607
5608                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5609                 parameter->parameter.v.value_number = next_value_number_function;
5610                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5611                                         parameter);
5612                 ++next_value_number_function;
5613
5614                 set_value(parameter->parameter.v.value_number, value);
5615         }
5616 }
5617
5618 /**
5619  * Handle additional decl modifiers for IR-graphs
5620  *
5621  * @param irg            the IR-graph
5622  * @param dec_modifiers  additional modifiers
5623  */
5624 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5625                                      decl_modifiers_t decl_modifiers)
5626 {
5627         if (decl_modifiers & DM_RETURNS_TWICE) {
5628                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5629                 set_irg_additional_property(irg, mtp_property_returns_twice);
5630         }
5631         if (decl_modifiers & DM_NORETURN) {
5632                 /* TRUE if the declaration includes the Microsoft
5633                    __declspec(noreturn) specifier. */
5634                 set_irg_additional_property(irg, mtp_property_noreturn);
5635         }
5636         if (decl_modifiers & DM_NOTHROW) {
5637                 /* TRUE if the declaration includes the Microsoft
5638                    __declspec(nothrow) specifier. */
5639                 set_irg_additional_property(irg, mtp_property_nothrow);
5640         }
5641         if (decl_modifiers & DM_NAKED) {
5642                 /* TRUE if the declaration includes the Microsoft
5643                    __declspec(naked) specifier. */
5644                 set_irg_additional_property(irg, mtp_property_naked);
5645         }
5646         if (decl_modifiers & DM_FORCEINLINE) {
5647                 /* TRUE if the declaration includes the
5648                    Microsoft __forceinline specifier. */
5649                 set_irg_inline_property(irg, irg_inline_forced);
5650         }
5651         if (decl_modifiers & DM_NOINLINE) {
5652                 /* TRUE if the declaration includes the Microsoft
5653                    __declspec(noinline) specifier. */
5654                 set_irg_inline_property(irg, irg_inline_forbidden);
5655         }
5656 }
5657
5658 static void add_function_pointer(ir_type *segment, ir_entity *method,
5659                                  const char *unique_template)
5660 {
5661         ir_type   *method_type  = get_entity_type(method);
5662         ir_type   *ptr_type     = new_type_pointer(method_type);
5663
5664         /* these entities don't really have a name but firm only allows
5665          * "" in ld_ident.
5666          * Note that we mustn't give these entities a name since for example
5667          * Mach-O doesn't allow them. */
5668         ident     *ide          = id_unique(unique_template);
5669         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5670         ir_graph  *irg          = get_const_code_irg();
5671         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5672                                                            method, NULL);
5673
5674         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5675         set_entity_compiler_generated(ptr, 1);
5676         set_entity_visibility(ptr, ir_visibility_local);
5677         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5678         set_atomic_ent_value(ptr, val);
5679 }
5680
5681 /**
5682  * Generate possible IJmp branches to a given label block.
5683  */
5684 static void gen_ijmp_branches(ir_node *block)
5685 {
5686         ir_node *ijmp;
5687         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5688                 add_immBlock_pred(block, ijmp);
5689         }
5690 }
5691
5692 /**
5693  * Create code for a function and all inner functions.
5694  *
5695  * @param entity  the function entity
5696  */
5697 static void create_function(entity_t *entity)
5698 {
5699         assert(entity->kind == ENTITY_FUNCTION);
5700         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5701
5702         if (entity->function.statement == NULL)
5703                 return;
5704
5705         if (is_main(entity) && firm_opt.os_support == OS_SUPPORT_MINGW) {
5706                 prepare_main_collect2(entity);
5707         }
5708
5709         inner_functions     = NULL;
5710         current_trampolines = NULL;
5711
5712         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5713                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5714                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5715         }
5716         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5717                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5718                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5719         }
5720
5721         current_function_entity = entity;
5722         current_function_name   = NULL;
5723         current_funcsig         = NULL;
5724
5725         assert(all_labels == NULL);
5726         all_labels = NEW_ARR_F(label_t *, 0);
5727         ijmp_list  = NULL;
5728
5729         int       n_local_vars = get_function_n_local_vars(entity);
5730         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5731
5732         ir_graph *old_current_function = current_function;
5733         current_function = irg;
5734
5735         set_irg_fp_model(irg, firm_opt.fp_model);
5736         tarval_enable_fp_ops(1);
5737         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5738
5739         ir_node *first_block = get_cur_block();
5740
5741         /* set inline flags */
5742         if (entity->function.is_inline)
5743                 set_irg_inline_property(irg, irg_inline_recomended);
5744         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5745
5746         next_value_number_function = 0;
5747         initialize_function_parameters(entity);
5748         current_static_link = entity->function.static_link;
5749
5750         statement_to_firm(entity->function.statement);
5751
5752         ir_node *end_block = get_irg_end_block(irg);
5753
5754         /* do we have a return statement yet? */
5755         if (get_cur_block() != NULL) {
5756                 type_t *type = skip_typeref(entity->declaration.type);
5757                 assert(is_type_function(type));
5758                 const function_type_t *func_type   = &type->function;
5759                 const type_t          *return_type
5760                         = skip_typeref(func_type->return_type);
5761
5762                 ir_node *ret;
5763                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5764                         ret = new_Return(get_store(), 0, NULL);
5765                 } else {
5766                         ir_mode *mode;
5767                         if (is_type_scalar(return_type)) {
5768                                 mode = get_ir_mode_storage(func_type->return_type);
5769                         } else {
5770                                 mode = mode_P_data;
5771                         }
5772
5773                         ir_node *in[1];
5774                         /* §5.1.2.2.3 main implicitly returns 0 */
5775                         if (is_main(entity)) {
5776                                 in[0] = new_Const(get_mode_null(mode));
5777                         } else {
5778                                 in[0] = new_Unknown(mode);
5779                         }
5780                         ret = new_Return(get_store(), 1, in);
5781                 }
5782                 add_immBlock_pred(end_block, ret);
5783         }
5784
5785         bool has_computed_gotos = false;
5786         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5787                 label_t *label = all_labels[i];
5788                 if (label->address_taken) {
5789                         gen_ijmp_branches(label->block);
5790                         has_computed_gotos = true;
5791                 }
5792                 mature_immBlock(label->block);
5793         }
5794         if (has_computed_gotos) {
5795                 /* if we have computed goto's in the function, we cannot inline it */
5796                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5797                         warningf(&entity->base.source_position,
5798                                  "function '%Y' can never be inlined because it contains a computed goto",
5799                                  entity->base.symbol);
5800                 }
5801                 set_irg_inline_property(irg, irg_inline_forbidden);
5802         }
5803
5804         DEL_ARR_F(all_labels);
5805         all_labels = NULL;
5806
5807         mature_immBlock(first_block);
5808         mature_immBlock(end_block);
5809
5810         irg_finalize_cons(irg);
5811
5812         /* finalize the frame type */
5813         ir_type *frame_type = get_irg_frame_type(irg);
5814         int      n          = get_compound_n_members(frame_type);
5815         int      align_all  = 4;
5816         int      offset     = 0;
5817         for (int i = 0; i < n; ++i) {
5818                 ir_entity *entity      = get_compound_member(frame_type, i);
5819                 ir_type   *entity_type = get_entity_type(entity);
5820
5821                 int align = get_type_alignment_bytes(entity_type);
5822                 if (align > align_all)
5823                         align_all = align;
5824                 int misalign = 0;
5825                 if (align > 0) {
5826                         misalign  = offset % align;
5827                         if (misalign > 0) {
5828                                 offset += align - misalign;
5829                         }
5830                 }
5831
5832                 set_entity_offset(entity, offset);
5833                 offset += get_type_size_bytes(entity_type);
5834         }
5835         set_type_size_bytes(frame_type, offset);
5836         set_type_alignment_bytes(frame_type, align_all);
5837
5838         irg_vrfy(irg);
5839         current_function = old_current_function;
5840
5841         if (current_trampolines != NULL) {
5842                 DEL_ARR_F(current_trampolines);
5843                 current_trampolines = NULL;
5844         }
5845
5846         /* create inner functions if any */
5847         entity_t **inner = inner_functions;
5848         if (inner != NULL) {
5849                 ir_type *rem_outer_frame      = current_outer_frame;
5850                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5851                 ir_type *rem_outer_value_type = current_outer_value_type;
5852                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5853                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5854                         create_function(inner[i]);
5855                 }
5856                 DEL_ARR_F(inner);
5857
5858                 current_outer_value_type = rem_outer_value_type;
5859                 current_outer_frame      = rem_outer_frame;
5860         }
5861 }
5862
5863 static void scope_to_firm(scope_t *scope)
5864 {
5865         /* first pass: create declarations */
5866         entity_t *entity = scope->entities;
5867         for ( ; entity != NULL; entity = entity->base.next) {
5868                 if (entity->base.symbol == NULL)
5869                         continue;
5870
5871                 if (entity->kind == ENTITY_FUNCTION) {
5872                         if (entity->function.btk != bk_none) {
5873                                 /* builtins have no representation */
5874                                 continue;
5875                         }
5876                         (void)get_function_entity(entity, NULL);
5877                 } else if (entity->kind == ENTITY_VARIABLE) {
5878                         create_global_variable(entity);
5879                 } else if (entity->kind == ENTITY_NAMESPACE) {
5880                         scope_to_firm(&entity->namespacee.members);
5881                 }
5882         }
5883
5884         /* second pass: create code/initializers */
5885         entity = scope->entities;
5886         for ( ; entity != NULL; entity = entity->base.next) {
5887                 if (entity->base.symbol == NULL)
5888                         continue;
5889
5890                 if (entity->kind == ENTITY_FUNCTION) {
5891                         if (entity->function.btk != bk_none) {
5892                                 /* builtins have no representation */
5893                                 continue;
5894                         }
5895                         create_function(entity);
5896                 } else if (entity->kind == ENTITY_VARIABLE) {
5897                         assert(entity->declaration.kind
5898                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5899                         current_ir_graph = get_const_code_irg();
5900                         create_variable_initializer(entity);
5901                 }
5902         }
5903 }
5904
5905 void init_ast2firm(void)
5906 {
5907         obstack_init(&asm_obst);
5908         init_atomic_modes();
5909
5910         ir_set_debug_retrieve(dbg_retrieve);
5911         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5912
5913         /* OS option must be set to the backend */
5914         switch (firm_opt.os_support) {
5915         case OS_SUPPORT_MINGW:
5916                 create_ld_ident = create_name_win32;
5917                 break;
5918         case OS_SUPPORT_LINUX:
5919                 create_ld_ident = create_name_linux_elf;
5920                 break;
5921         case OS_SUPPORT_MACHO:
5922                 create_ld_ident = create_name_macho;
5923                 break;
5924         default:
5925                 panic("unexpected OS support mode");
5926         }
5927
5928         /* create idents for all known runtime functions */
5929         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5930                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5931         }
5932
5933         entitymap_init(&entitymap);
5934 }
5935
5936 static void init_ir_types(void)
5937 {
5938         static int ir_types_initialized = 0;
5939         if (ir_types_initialized)
5940                 return;
5941         ir_types_initialized = 1;
5942
5943         ir_type_int        = get_ir_type(type_int);
5944         ir_type_char       = get_ir_type(type_char);
5945         ir_type_const_char = get_ir_type(type_const_char);
5946         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5947         ir_type_void       = get_ir_type(type_void);
5948
5949         be_params             = be_get_backend_param();
5950         mode_float_arithmetic = be_params->mode_float_arithmetic;
5951
5952         stack_param_align     = be_params->stack_param_align;
5953 }
5954
5955 void exit_ast2firm(void)
5956 {
5957         entitymap_destroy(&entitymap);
5958         obstack_free(&asm_obst, NULL);
5959 }
5960
5961 static void global_asm_to_firm(statement_t *s)
5962 {
5963         for (; s != NULL; s = s->base.next) {
5964                 assert(s->kind == STATEMENT_ASM);
5965
5966                 char const *const text = s->asms.asm_text.begin;
5967                 size_t            size = s->asms.asm_text.size;
5968
5969                 /* skip the last \0 */
5970                 if (text[size - 1] == '\0')
5971                         --size;
5972
5973                 ident *const id = new_id_from_chars(text, size);
5974                 add_irp_asm(id);
5975         }
5976 }
5977
5978 void translation_unit_to_firm(translation_unit_t *unit)
5979 {
5980         /* just to be sure */
5981         continue_label           = NULL;
5982         break_label              = NULL;
5983         current_switch_cond      = NULL;
5984         current_translation_unit = unit;
5985
5986         init_ir_types();
5987
5988         scope_to_firm(&unit->scope);
5989         global_asm_to_firm(unit->global_asm);
5990
5991         current_ir_graph         = NULL;
5992         current_translation_unit = NULL;
5993 }