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 "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 typedef struct trampoline_region trampoline_region;
  54 struct trampoline_region {
  55         ir_entity        *function;    /**< The function that is called by this trampoline */
  56         ir_entity        *region;      /**< created region for the trampoline */
  57 };
  58
  59 static const backend_params *be_params;
  60
  61 static ir_type *ir_type_char;
  62 static ir_type *ir_type_const_char;
  63 static ir_type *ir_type_wchar_t;
  64 static ir_type *ir_type_void;
  65 static ir_type *ir_type_int;
  66
  67 /* architecture specific floating point arithmetic mode (if any) */
  68 static ir_mode *mode_float_arithmetic;
  69
  70 /* alignment of stack parameters */
  71 static unsigned stack_param_align;
  72
  73 static int        next_value_number_function;
  74 static ir_node   *continue_label;
  75 static ir_node   *break_label;
  76 static ir_node   *current_switch_cond;
  77 static bool       saw_default_label;
  78 static label_t  **all_labels;
  79 static entity_t **inner_functions;
  80 static ir_node   *ijmp_list;
  81 static bool       constant_folding;
  82 static bool       initializer_use_bitfield_basetype;
  83
  84 extern bool       have_const_functions;
  85
  86 static const entity_t     *current_function_entity;
  87 static ir_node            *current_function_name;
  88 static ir_node            *current_funcsig;
  89 static switch_statement_t *current_switch;
  90 static ir_graph           *current_function;
  91 static translation_unit_t *current_translation_unit;
  92 static trampoline_region  *current_trampolines;
  93 static ir_type            *current_outer_frame;
  94 static ir_type            *current_outer_value_type;
  95 static ir_node            *current_static_link;
  96
  97 static entitymap_t  entitymap;
  98
  99 static struct obstack asm_obst;
 100
 101 typedef enum declaration_kind_t {
 102         DECLARATION_KIND_UNKNOWN,
 103         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 104         DECLARATION_KIND_GLOBAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 107         DECLARATION_KIND_PARAMETER,
 108         DECLARATION_KIND_PARAMETER_ENTITY,
 109         DECLARATION_KIND_FUNCTION,
 110         DECLARATION_KIND_COMPOUND_MEMBER,
 111         DECLARATION_KIND_INNER_FUNCTION
 112 } declaration_kind_t;
 113
 114 static ir_mode *get_ir_mode_storage(type_t *type);
 115 /*
 116  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 117  * int that it returns bigger modes for floating point on some platforms
 118  * (x87 internally does arithemtic with 80bits)
 119  */
 120 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 121
 122 static ir_type *get_ir_type_incomplete(type_t *type);
 123
 124 static void enqueue_inner_function(entity_t *entity)
 125 {
 126         if (inner_functions == NULL)
 127                 inner_functions = NEW_ARR_F(entity_t *, 0);
 128         ARR_APP1(entity_t*, inner_functions, entity);
 129 }
 130
 131 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 132 {
 133         const entity_t *entity = get_irg_loc_description(irg, pos);
 134
 135         if (entity != NULL) {
 136                 warningf(&entity->base.source_position,
 137                          "%s '%#T' might be used uninitialized",
 138                          get_entity_kind_name(entity->kind),
 139                          entity->declaration.type, entity->base.symbol);
 140         }
 141         return new_r_Unknown(irg, mode);
 142 }
 143
 144 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 145 {
 146         const source_position_t *pos = (const source_position_t*) dbg;
 147         if (pos == NULL)
 148                 return 0;
 149         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 150                                    pos->linenr);
 151 }
 152
 153 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 154 {
 155         const source_position_t *pos = (const source_position_t*) dbg;
 156         if (pos == NULL)
 157                 return NULL;
 158         if (line != NULL)
 159                 *line = pos->linenr;
 160         return pos->input_name;
 161 }
 162
 163 static dbg_info *get_dbg_info(const source_position_t *pos)
 164 {
 165         return (dbg_info*) pos;
 166 }
 167
 168 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 169
 170 static ir_mode *mode_int, *mode_uint;
 171
 172 static ir_node *_expression_to_firm(const expression_t *expression);
 173 static ir_node *expression_to_firm(const expression_t *expression);
 174 static void create_local_declaration(entity_t *entity);
 175
 176 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 177 {
 178         unsigned flags = get_atomic_type_flags(kind);
 179         unsigned size  = get_atomic_type_size(kind);
 180         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 181                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 182                 char            name[64];
 183                 ir_mode_sort    sort;
 184                 unsigned        bit_size     = size * 8;
 185                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 186                 unsigned        modulo_shift;
 187                 ir_mode_arithmetic arithmetic;
 188
 189                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 190                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 191                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 192                                  bit_size);
 193                         sort         = irms_int_number;
 194                         arithmetic   = irma_twos_complement;
 195                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 196                 } else {
 197                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 198                         snprintf(name, sizeof(name), "F%u", bit_size);
 199                         sort         = irms_float_number;
 200                         arithmetic   = irma_ieee754;
 201                         modulo_shift = 0;
 202                 }
 203                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 204                                    modulo_shift);
 205         }
 206
 207         return NULL;
 208 }
 209
 210 /**
 211  * Initialises the atomic modes depending on the machine size.
 212  */
 213 static void init_atomic_modes(void)
 214 {
 215         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 216                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 217         }
 218         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 219         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 220
 221         /* there's no real void type in firm */
 222         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 223
 224         /* initialize pointer modes */
 225         char            name[64];
 226         ir_mode_sort    sort         = irms_reference;
 227         unsigned        bit_size     = machine_size;
 228         bool            is_signed    = 0;
 229         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 230         unsigned        modulo_shift
 231                 = bit_size < machine_size ? machine_size : bit_size;
 232
 233         snprintf(name, sizeof(name), "p%u", machine_size);
 234         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 235                                         modulo_shift);
 236
 237         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 238         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 239
 240         /* Hmm, pointers should be machine size */
 241         set_modeP_data(ptr_mode);
 242         set_modeP_code(ptr_mode);
 243 }
 244
 245 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 246 {
 247         assert(kind <= ATOMIC_TYPE_LAST);
 248         return atomic_modes[kind];
 249 }
 250
 251 static ir_node *get_vla_size(array_type_t *const type)
 252 {
 253         ir_node *size_node = type->size_node;
 254         if (size_node == NULL) {
 255                 size_node = expression_to_firm(type->size_expression);
 256                 type->size_node = size_node;
 257         }
 258         return size_node;
 259 }
 260
 261 /**
 262  * Return a node representing the size of a type.
 263  */
 264 static ir_node *get_type_size_node(type_t *type)
 265 {
 266         type = skip_typeref(type);
 267
 268         if (is_type_array(type) && type->array.is_vla) {
 269                 ir_node *size_node = get_vla_size(&type->array);
 270                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 271                 ir_mode *mode      = get_irn_mode(size_node);
 272                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 273                 return real_size;
 274         }
 275
 276         ir_mode *mode = get_ir_mode_storage(type_size_t);
 277         symconst_symbol sym;
 278         sym.type_p = get_ir_type(type);
 279         return new_SymConst(mode, sym, symconst_type_size);
 280 }
 281
 282 static unsigned count_parameters(const function_type_t *function_type)
 283 {
 284         unsigned count = 0;
 285
 286         function_parameter_t *parameter = function_type->parameters;
 287         for ( ; parameter != NULL; parameter = parameter->next) {
 288                 ++count;
 289         }
 290
 291         return count;
 292 }
 293
 294 /**
 295  * Creates a Firm type for an atomic type
 296  */
 297 static ir_type *create_atomic_type(atomic_type_kind_t akind)
 298 {
 299         ir_mode        *mode      = atomic_modes[akind];
 300         ident          *id        = get_mode_ident(mode);
 301         ir_type        *irtype    = new_type_primitive(id, mode);
 302         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 303
 304         set_type_alignment_bytes(irtype, alignment);
 305
 306         return irtype;
 307 }
 308
 309 /**
 310  * Creates a Firm type for a complex type
 311  */
 312 static ir_type *create_complex_type(const complex_type_t *type)
 313 {
 314         atomic_type_kind_t  kind = type->akind;
 315         ir_mode            *mode = atomic_modes[kind];
 316         ident              *id   = get_mode_ident(mode);
 317
 318         (void) id;
 319
 320         /* FIXME: finish the array */
 321         return NULL;
 322 }
 323
 324 /**
 325  * Creates a Firm type for an imaginary type
 326  */
 327 static ir_type *create_imaginary_type(imaginary_type_t *type)
 328 {
 329         atomic_type_kind_t  kind      = type->akind;
 330         ir_mode            *mode      = atomic_modes[kind];
 331         ident              *id        = get_mode_ident(mode);
 332         ir_type            *irtype    = new_type_primitive(id, mode);
 333         il_alignment_t      alignment = get_type_alignment((type_t*) type);
 334
 335         set_type_alignment_bytes(irtype, alignment);
 336
 337         return irtype;
 338 }
 339
 340 /**
 341  * return type of a parameter (and take transparent union gnu extension into
 342  * account)
 343  */
 344 static type_t *get_parameter_type(type_t *orig_type)
 345 {
 346         type_t *type = skip_typeref(orig_type);
 347         if (is_type_union(type)
 348                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 349                 compound_t *compound = type->compound.compound;
 350                 type                 = compound->members.entities->declaration.type;
 351         }
 352
 353         return type;
 354 }
 355
 356 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 357 {
 358         type_t  *return_type  = skip_typeref(function_type->return_type);
 359
 360         ident   *id           = id_unique("functiontype.%u");
 361         int      n_parameters = count_parameters(function_type) + (for_closure ? 1 : 0);
 362         int      n_results    = return_type == type_void ? 0 : 1;
 363         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 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_t   *points_to    = type->points_to;
 426         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 427         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 428                                                   ir_points_to, mode_P_data);
 429
 430         return ir_type;
 431 }
 432
 433 static ir_type *create_reference_type(reference_type_t *type)
 434 {
 435         type_t  *refers_to    = type->refers_to;
 436         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 437         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 438                                                  ir_refers_to, mode_P_data);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_type *create_array_type(array_type_t *type)
 444 {
 445         type_t  *element_type    = type->element_type;
 446         ir_type *ir_element_type = get_ir_type(element_type);
 447
 448         ident    *id      = id_unique("array.%u");
 449         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 450
 451         const int align = get_type_alignment_bytes(ir_element_type);
 452         set_type_alignment_bytes(ir_type, align);
 453
 454         if (type->size_constant) {
 455                 int n_elements = type->size;
 456
 457                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 458
 459                 size_t elemsize = get_type_size_bytes(ir_element_type);
 460                 if (elemsize % align > 0) {
 461                         elemsize += align - (elemsize % align);
 462                 }
 463                 set_type_size_bytes(ir_type, n_elements * elemsize);
 464         } else {
 465                 set_array_lower_bound_int(ir_type, 0, 0);
 466         }
 467         set_type_state(ir_type, layout_fixed);
 468
 469         return ir_type;
 470 }
 471
 472 /**
 473  * Return the signed integer type of size bits.
 474  *
 475  * @param size   the size
 476  */
 477 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 478                                                  unsigned size)
 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         char name[32];
 498         snprintf(name, sizeof(name), "I%u", size);
 499         ident *id = new_id_from_str(name);
 500         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 501         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 502         set_primitive_base_type(res, base_tp);
 503
 504         return res;
 505 }
 506
 507 /**
 508  * Return the unsigned integer type of size bits.
 509  *
 510  * @param size   the size
 511  */
 512 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 513                                                    unsigned size)
 514 {
 515         static ir_mode *u_modes[64 + 1] = {NULL, };
 516         ir_type *res;
 517         ir_mode *mode;
 518
 519         if (size <= 0 || size > 64)
 520                 return NULL;
 521
 522         mode = u_modes[size];
 523         if (mode == NULL) {
 524                 char name[32];
 525
 526                 snprintf(name, sizeof(name), "bf_U%u", size);
 527                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 528                                    size <= 32 ? 32 : size );
 529                 u_modes[size] = mode;
 530         }
 531
 532         char name[32];
 533
 534         snprintf(name, sizeof(name), "U%u", size);
 535         ident *id = new_id_from_str(name);
 536         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 537         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 538         set_primitive_base_type(res, base_tp);
 539
 540         return res;
 541 }
 542
 543 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 544 {
 545         type_t *base = skip_typeref(type->base_type);
 546         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 547         ir_type *irbase = get_ir_type(base);
 548
 549         unsigned size = type->bit_size;
 550
 551         assert(!is_type_float(base));
 552         if (is_type_signed(base)) {
 553                 return get_signed_int_type_for_bit_size(irbase, size);
 554         } else {
 555                 return get_unsigned_int_type_for_bit_size(irbase, size);
 556         }
 557 }
 558
 559 #define INVALID_TYPE ((ir_type_ptr)-1)
 560
 561 enum {
 562         COMPOUND_IS_STRUCT = false,
 563         COMPOUND_IS_UNION  = true
 564 };
 565
 566 /**
 567  * Construct firm type from ast struct type.
 568  */
 569 static ir_type *create_compound_type(compound_type_t *type,
 570                                      bool incomplete, bool is_union)
 571 {
 572         compound_t *compound = type->compound;
 573
 574         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 575                 return compound->irtype;
 576         }
 577
 578         symbol_t *symbol = compound->base.symbol;
 579         ident    *id;
 580         if (symbol != NULL) {
 581                 id = new_id_from_str(symbol->string);
 582         } else {
 583                 if (is_union) {
 584                         id = id_unique("__anonymous_union.%u");
 585                 } else {
 586                         id = id_unique("__anonymous_struct.%u");
 587                 }
 588         }
 589         dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 590
 591         ir_type *irtype;
 592         if (is_union) {
 593                 irtype = new_d_type_union(id, dbgi);
 594         } else {
 595                 irtype = new_d_type_struct(id, dbgi);
 596         }
 597
 598         compound->irtype_complete = false;
 599         compound->irtype          = irtype;
 600
 601         if (incomplete)
 602                 return irtype;
 603
 604         if (is_union) {
 605                 layout_union_type(type);
 606         } else {
 607                 layout_struct_type(type);
 608         }
 609
 610         compound->irtype_complete = true;
 611
 612         entity_t *entry = compound->members.entities;
 613         for ( ; entry != NULL; entry = entry->base.next) {
 614                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 615                         continue;
 616
 617                 symbol_t *symbol     = entry->base.symbol;
 618                 type_t   *entry_type = entry->declaration.type;
 619                 ident    *ident;
 620                 if (symbol == NULL) {
 621                         /* anonymous bitfield member, skip */
 622                         if (entry_type->kind == TYPE_BITFIELD)
 623                                 continue;
 624                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 625                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 626                         ident = id_unique("anon.%u");
 627                 } else {
 628                         ident = new_id_from_str(symbol->string);
 629                 }
 630
 631                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 632
 633                 ir_type   *entry_irtype = get_ir_type(entry_type);
 634                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 635
 636                 set_entity_offset(entity, entry->compound_member.offset);
 637                 set_entity_offset_bits_remainder(entity,
 638                                                  entry->compound_member.bit_offset);
 639
 640                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 641                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 642                 entry->compound_member.entity = entity;
 643         }
 644
 645         set_type_alignment_bytes(irtype, compound->alignment);
 646         set_type_size_bytes(irtype, compound->size);
 647         set_type_state(irtype, layout_fixed);
 648
 649         return irtype;
 650 }
 651
 652 static ir_type *create_enum_type(enum_type_t *const type)
 653 {
 654         type->base.firm_type = ir_type_int;
 655
 656         ir_mode *const mode    = mode_int;
 657         tarval  *const one     = get_mode_one(mode);
 658         tarval  *      tv_next = get_tarval_null(mode);
 659
 660         bool constant_folding_old = constant_folding;
 661         constant_folding = true;
 662
 663         enum_t   *enume = type->enume;
 664         entity_t *entry = enume->base.next;
 665         for (; entry != NULL; entry = entry->base.next) {
 666                 if (entry->kind != ENTITY_ENUM_VALUE)
 667                         break;
 668
 669                 expression_t *const init = entry->enum_value.value;
 670                 if (init != NULL) {
 671                         ir_node *const cnst = expression_to_firm(init);
 672                         if (!is_Const(cnst)) {
 673                                 panic("couldn't fold constant");
 674                         }
 675                         tv_next = get_Const_tarval(cnst);
 676                 }
 677                 entry->enum_value.tv = tv_next;
 678                 tv_next = tarval_add(tv_next, one);
 679         }
 680
 681         constant_folding = constant_folding_old;
 682
 683         return create_atomic_type(type->akind);
 684 }
 685
 686 static ir_type *get_ir_type_incomplete(type_t *type)
 687 {
 688         assert(type != NULL);
 689         type = skip_typeref(type);
 690
 691         if (type->base.firm_type != NULL) {
 692                 assert(type->base.firm_type != INVALID_TYPE);
 693                 return type->base.firm_type;
 694         }
 695
 696         switch (type->kind) {
 697         case TYPE_COMPOUND_STRUCT:
 698                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 699         case TYPE_COMPOUND_UNION:
 700                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 701         default:
 702                 return get_ir_type(type);
 703         }
 704 }
 705
 706 ir_type *get_ir_type(type_t *type)
 707 {
 708         assert(type != NULL);
 709
 710         type = skip_typeref(type);
 711
 712         if (type->base.firm_type != NULL) {
 713                 assert(type->base.firm_type != INVALID_TYPE);
 714                 return type->base.firm_type;
 715         }
 716
 717         ir_type *firm_type = NULL;
 718         switch (type->kind) {
 719         case TYPE_ERROR:
 720                 /* Happens while constant folding, when there was an error */
 721                 return create_atomic_type(ATOMIC_TYPE_VOID);
 722
 723         case TYPE_ATOMIC:
 724                 firm_type = create_atomic_type(type->atomic.akind);
 725                 break;
 726         case TYPE_COMPLEX:
 727                 firm_type = create_complex_type(&type->complex);
 728                 break;
 729         case TYPE_IMAGINARY:
 730                 firm_type = create_imaginary_type(&type->imaginary);
 731                 break;
 732         case TYPE_FUNCTION:
 733                 firm_type = create_method_type(&type->function, false);
 734                 break;
 735         case TYPE_POINTER:
 736                 firm_type = create_pointer_type(&type->pointer);
 737                 break;
 738         case TYPE_REFERENCE:
 739                 firm_type = create_reference_type(&type->reference);
 740                 break;
 741         case TYPE_ARRAY:
 742                 firm_type = create_array_type(&type->array);
 743                 break;
 744         case TYPE_COMPOUND_STRUCT:
 745                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 746                 break;
 747         case TYPE_COMPOUND_UNION:
 748                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 749                 break;
 750         case TYPE_ENUM:
 751                 firm_type = create_enum_type(&type->enumt);
 752                 break;
 753         case TYPE_BUILTIN:
 754                 firm_type = get_ir_type(type->builtin.real_type);
 755                 break;
 756         case TYPE_BITFIELD:
 757                 firm_type = create_bitfield_type(&type->bitfield);
 758                 break;
 759
 760         case TYPE_TYPEOF:
 761         case TYPE_TYPEDEF:
 762         case TYPE_INVALID:
 763                 break;
 764         }
 765         if (firm_type == NULL)
 766                 panic("unknown type found");
 767
 768         type->base.firm_type = firm_type;
 769         return firm_type;
 770 }
 771
 772 static ir_mode *get_ir_mode_storage(type_t *type)
 773 {
 774         ir_type *irtype = get_ir_type(type);
 775
 776         /* firm doesn't report a mode for arrays somehow... */
 777         if (is_Array_type(irtype)) {
 778                 return mode_P_data;
 779         }
 780
 781         ir_mode *mode = get_type_mode(irtype);
 782         assert(mode != NULL);
 783         return mode;
 784 }
 785
 786 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 787 {
 788         ir_mode *mode = get_ir_mode_storage(type);
 789         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 790                 return mode_float_arithmetic;
 791         }
 792
 793         return mode;
 794 }
 795
 796 /** Names of the runtime functions. */
 797 static const struct {
 798         int        id;           /**< the rts id */
 799         int        n_res;        /**< number of return values */
 800         const char *name;        /**< the name of the rts function */
 801         int        n_params;     /**< number of parameters */
 802         unsigned   flags;        /**< language flags */
 803 } rts_data[] = {
 804         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 805         { rts_abort,      0, "abort",        0, _C89 },
 806         { rts_alloca,     1, "alloca",       1, _ALL },
 807         { rts_abs,        1, "abs",          1, _C89 },
 808         { rts_labs,       1, "labs",         1, _C89 },
 809         { rts_llabs,      1, "llabs",        1, _C99 },
 810         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 811
 812         { rts_fabs,       1, "fabs",         1, _C89 },
 813         { rts_sqrt,       1, "sqrt",         1, _C89 },
 814         { rts_cbrt,       1, "cbrt",         1, _C99 },
 815         { rts_exp,        1, "exp",          1, _C89 },
 816         { rts_exp2,       1, "exp2",         1, _C89 },
 817         { rts_exp10,      1, "exp10",        1, _GNUC },
 818         { rts_log,        1, "log",          1, _C89 },
 819         { rts_log2,       1, "log2",         1, _C89 },
 820         { rts_log10,      1, "log10",        1, _C89 },
 821         { rts_pow,        1, "pow",          2, _C89 },
 822         { rts_sin,        1, "sin",          1, _C89 },
 823         { rts_cos,        1, "cos",          1, _C89 },
 824         { rts_tan,        1, "tan",          1, _C89 },
 825         { rts_asin,       1, "asin",         1, _C89 },
 826         { rts_acos,       1, "acos",         1, _C89 },
 827         { rts_atan,       1, "atan",         1, _C89 },
 828         { rts_sinh,       1, "sinh",         1, _C89 },
 829         { rts_cosh,       1, "cosh",         1, _C89 },
 830         { rts_tanh,       1, "tanh",         1, _C89 },
 831
 832         { rts_fabsf,      1, "fabsf",        1, _C99 },
 833         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 834         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 835         { rts_expf,       1, "expf",         1, _C99 },
 836         { rts_exp2f,      1, "exp2f",        1, _C99 },
 837         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 838         { rts_logf,       1, "logf",         1, _C99 },
 839         { rts_log2f,      1, "log2f",        1, _C99 },
 840         { rts_log10f,     1, "log10f",       1, _C99 },
 841         { rts_powf,       1, "powf",         2, _C99 },
 842         { rts_sinf,       1, "sinf",         1, _C99 },
 843         { rts_cosf,       1, "cosf",         1, _C99 },
 844         { rts_tanf,       1, "tanf",         1, _C99 },
 845         { rts_asinf,      1, "asinf",        1, _C99 },
 846         { rts_acosf,      1, "acosf",        1, _C99 },
 847         { rts_atanf,      1, "atanf",        1, _C99 },
 848         { rts_sinhf,      1, "sinhf",        1, _C99 },
 849         { rts_coshf,      1, "coshf",        1, _C99 },
 850         { rts_tanhf,      1, "tanhf",        1, _C99 },
 851
 852         { rts_fabsl,      1, "fabsl",        1, _C99 },
 853         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 854         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 855         { rts_expl,       1, "expl",         1, _C99 },
 856         { rts_exp2l,      1, "exp2l",        1, _C99 },
 857         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 858         { rts_logl,       1, "logl",         1, _C99 },
 859         { rts_log2l,      1, "log2l",        1, _C99 },
 860         { rts_log10l,     1, "log10l",       1, _C99 },
 861         { rts_powl,       1, "powl",         2, _C99 },
 862         { rts_sinl,       1, "sinl",         1, _C99 },
 863         { rts_cosl,       1, "cosl",         1, _C99 },
 864         { rts_tanl,       1, "tanl",         1, _C99 },
 865         { rts_asinl,      1, "asinl",        1, _C99 },
 866         { rts_acosl,      1, "acosl",        1, _C99 },
 867         { rts_atanl,      1, "atanl",        1, _C99 },
 868         { rts_sinhl,      1, "sinhl",        1, _C99 },
 869         { rts_coshl,      1, "coshl",        1, _C99 },
 870         { rts_tanhl,      1, "tanhl",        1, _C99 },
 871
 872         { rts_strcmp,     1, "strcmp",       2, _C89 },
 873         { rts_strncmp,    1, "strncmp",      3, _C89 },
 874         { rts_strcpy,     1, "strcpy",       2, _C89 },
 875         { rts_strlen,     1, "strlen",       1, _C89 },
 876         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 877         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 878         { rts_memmove,    1, "memmove",      3, _C89 },  /* HMM, man say its C99 */
 879         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 880         { rts_memcmp,     1, "memcmp",       3, _C89 },  /* HMM, man say its C99 */
 881 };
 882
 883 static ident *rts_idents[lengthof(rts_data)];
 884
 885 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 886
 887 /**
 888  * Handle GNU attributes for entities
 889  *
 890  * @param ent   the entity
 891  * @param decl  the routine declaration
 892  */
 893 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 894 {
 895         assert(is_declaration(entity));
 896         decl_modifiers_t modifiers = entity->declaration.modifiers;
 897         if (modifiers & DM_PURE) {
 898                 /* TRUE if the declaration includes the GNU
 899                    __attribute__((pure)) specifier. */
 900                 set_entity_additional_property(irentity, mtp_property_pure);
 901         }
 902         if (modifiers & DM_CONST) {
 903                 set_entity_additional_property(irentity, mtp_property_const);
 904                 have_const_functions = true;
 905         }
 906         if (modifiers & DM_USED) {
 907                 /* TRUE if the declaration includes the GNU
 908                    __attribute__((used)) specifier. */
 909                 set_entity_stickyness(irentity, stickyness_sticky);
 910         }
 911 }
 912
 913 static bool is_main(entity_t *entity)
 914 {
 915         static symbol_t *sym_main = NULL;
 916         if (sym_main == NULL) {
 917                 sym_main = symbol_table_insert("main");
 918         }
 919
 920         if (entity->base.symbol != sym_main)
 921                 return false;
 922         /* must be in outermost scope */
 923         if (entity->base.parent_scope != &current_translation_unit->scope)
 924                 return false;
 925
 926         return true;
 927 }
 928
 929 /**
 930  * Creates an entity representing a function.
 931  *
 932  * @param declaration  the function declaration
 933  * @param owner_type   the owner type of this function, NULL
 934  *                     for global functions
 935  */
 936 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 937 {
 938         assert(entity->kind == ENTITY_FUNCTION);
 939         if (entity->function.irentity != NULL) {
 940                 return entity->function.irentity;
 941         }
 942
 943         if (is_main(entity)) {
 944                 /* force main to C linkage */
 945                 type_t *type = entity->declaration.type;
 946                 assert(is_type_function(type));
 947                 if (type->function.linkage != LINKAGE_C) {
 948                         type_t *new_type           = duplicate_type(type);
 949                         new_type->function.linkage = LINKAGE_C;
 950                         type                       = identify_new_type(new_type);
 951                         entity->declaration.type   = type;
 952                 }
 953         }
 954
 955         symbol_t *symbol = entity->base.symbol;
 956         ident    *id     = new_id_from_str(symbol->string);
 957
 958
 959         /* already an entity defined? */
 960         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 961         bool const has_body = entity->function.statement != NULL;
 962         if (irentity != NULL) {
 963                 if (get_entity_visibility(irentity) == visibility_external_allocated
 964                                 && has_body) {
 965                         set_entity_visibility(irentity, visibility_external_visible);
 966                 }
 967                 goto entity_created;
 968         }
 969
 970         ir_type *ir_type_method;
 971         if (entity->function.need_closure)
 972                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 973         else
 974                 ir_type_method = get_ir_type(entity->declaration.type);
 975
 976         bool nested_function = false;
 977         if (owner_type == NULL)
 978                 owner_type = get_glob_type();
 979         else
 980                 nested_function = true;
 981
 982         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 983         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 984
 985         ident *ld_id;
 986         if (nested_function)
 987                 ld_id = id_unique("inner.%u");
 988         else
 989                 ld_id = create_ld_ident(entity);
 990         set_entity_ld_ident(irentity, ld_id);
 991
 992         handle_decl_modifiers(irentity, entity);
 993
 994         if (! nested_function) {
 995                 /* static inline             => local
 996                  * extern inline             => local
 997                  * inline without definition => local
 998                  * inline with definition    => external_visible */
 999                 storage_class_tag_t const storage_class
1000                         = (storage_class_tag_t) entity->declaration.storage_class;
1001                 bool                const is_inline     = entity->function.is_inline;
1002
1003                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1004                         set_entity_visibility(irentity, visibility_external_visible);
1005                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1006                            (is_inline && has_body)) {
1007                         if (!has_body) {
1008                                 /* this entity was declared, but is defined nowhere */
1009                                 set_entity_peculiarity(irentity, peculiarity_description);
1010                         }
1011                         set_entity_visibility(irentity, visibility_local);
1012                 } else if (has_body) {
1013                         set_entity_visibility(irentity, visibility_external_visible);
1014                 } else {
1015                         set_entity_visibility(irentity, visibility_external_allocated);
1016                 }
1017         } else {
1018                 /* nested functions are always local */
1019                 set_entity_visibility(irentity, visibility_local);
1020         }
1021         set_entity_allocation(irentity, allocation_static);
1022
1023         /* We should check for file scope here, but as long as we compile C only
1024            this is not needed. */
1025         if (! firm_opt.freestanding && !has_body) {
1026                 /* check for a known runtime function */
1027                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1028                         if (id != rts_idents[i])
1029                                 continue;
1030
1031                         /* ignore those rts functions not necessary needed for current mode */
1032                         if ((c_mode & rts_data[i].flags) == 0)
1033                                 continue;
1034                         assert(rts_entities[rts_data[i].id] == NULL);
1035                         rts_entities[rts_data[i].id] = irentity;
1036                 }
1037         }
1038
1039         entitymap_insert(&entitymap, symbol, irentity);
1040
1041 entity_created:
1042         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1043         entity->function.irentity = irentity;
1044
1045         return irentity;
1046 }
1047
1048 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1049 {
1050         ir_mode *value_mode = get_irn_mode(value);
1051
1052         if (value_mode == dest_mode || is_Bad(value))
1053                 return value;
1054
1055         if (dest_mode == mode_b) {
1056                 ir_node *zero = new_Const(get_mode_null(value_mode));
1057                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1058                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1059                 return proj;
1060         }
1061
1062         return new_d_Conv(dbgi, value, dest_mode);
1063 }
1064
1065 /**
1066  * Creates a Const node representing a constant.
1067  */
1068 static ir_node *const_to_firm(const const_expression_t *cnst)
1069 {
1070         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1071         type_t   *type = skip_typeref(cnst->base.type);
1072         ir_mode  *mode = get_ir_mode_storage(type);
1073
1074         char    buf[128];
1075         tarval *tv;
1076         size_t  len;
1077         if (mode_is_float(mode)) {
1078                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1079         } else {
1080                 if (mode_is_signed(mode)) {
1081                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1082                 } else {
1083                         len = snprintf(buf, sizeof(buf), "%llu",
1084                                        (unsigned long long) cnst->v.int_value);
1085                 }
1086                 tv = new_tarval_from_str(buf, len, mode);
1087         }
1088
1089         ir_node *res        = new_d_Const(dbgi, tv);
1090         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1091         return create_conv(dbgi, res, mode_arith);
1092 }
1093
1094 /**
1095  * Creates a Const node representing a character constant.
1096  */
1097 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1098 {
1099         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1100         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1101
1102         long long int v;
1103         size_t const  size = cnst->v.character.size;
1104         if (size == 1 && char_is_signed) {
1105                 v = (signed char)cnst->v.character.begin[0];
1106         } else {
1107                 v = 0;
1108                 for (size_t i = 0; i < size; ++i) {
1109                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1110                 }
1111         }
1112         char    buf[128];
1113         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1114         tarval *tv = new_tarval_from_str(buf, len, mode);
1115
1116         return new_d_Const(dbgi, tv);
1117 }
1118
1119 /**
1120  * Creates a Const node representing a wide character constant.
1121  */
1122 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1123 {
1124         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1125         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1126
1127         long long int v = cnst->v.wide_character.begin[0];
1128
1129         char    buf[128];
1130         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1131         tarval *tv = new_tarval_from_str(buf, len, mode);
1132
1133         return new_d_Const(dbgi, tv);
1134 }
1135
1136 /*
1137  * Allocate an area of size bytes aligned at alignment
1138  * at a frame type.
1139  */
1140 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment) {
1141         static unsigned area_cnt = 0;
1142         char buf[32];
1143
1144         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1145         ident *name = new_id_from_str(buf);
1146
1147         ir_type *tp = new_type_array(id_mangle_u(get_type_ident(frame_type), name), 1, ir_type_char);
1148         set_array_bounds_int(tp, 0, 0, size);
1149         set_type_alignment_bytes(tp, alignment);
1150
1151         ir_entity *area = new_entity(frame_type, name, tp);
1152
1153         /* mark this entity as compiler generated */
1154         set_entity_compiler_generated(area, 1);
1155         return area;
1156 }
1157
1158 /**
1159  * Return a node representing a trampoline reagion
1160  * for a given entity.
1161  *
1162  * @param dbgi    debug info
1163  * @param entity  the entity
1164  */
1165 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1166 {
1167         ir_entity *region = NULL;
1168         int        i;
1169
1170         if (current_trampolines != NULL) {
1171                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1172                         if (current_trampolines[i].function == entity) {
1173                                 region = current_trampolines[i].region;
1174                                 break;
1175                         }
1176                 }
1177         } else {
1178                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1179         }
1180         ir_graph *irg = current_ir_graph;
1181         if (region == NULL) {
1182                 /* create a new region */
1183                 ir_type           *frame_tp = get_irg_frame_type(irg);
1184                 trampoline_region  reg;
1185                 reg.function = entity;
1186
1187                 reg.region   = alloc_trampoline(frame_tp,
1188                                                 be_params->trampoline_size,
1189                                                 be_params->trampoline_align);
1190                 ARR_APP1(trampoline_region, current_trampolines, reg);
1191                 region = reg.region;
1192         }
1193         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1194                                region);
1195 }
1196
1197
1198 /**
1199  * Creates a SymConst for a given entity.
1200  *
1201  * @param dbgi    debug info
1202  * @param mode    the (reference) mode for the SymConst
1203  * @param entity  the entity
1204  */
1205 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1206                                 ir_entity *entity)
1207 {
1208         assert(entity != NULL);
1209         union symconst_symbol sym;
1210         sym.entity_p = entity;
1211         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1212 }
1213
1214 /**
1215  * Creates a SymConst for a given trampoline of an entity.
1216  *
1217  * @param dbgi    debug info
1218  * @param mode    the (reference) mode for the SymConst
1219  * @param entity  the entity
1220  */
1221 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1222                                   ir_entity *entity)
1223 {
1224         assert(entity != NULL);
1225         ir_node *in[3];
1226         in[0] = get_trampoline_region(dbgi, entity);
1227         in[1] = create_symconst(dbgi, mode, entity);
1228         in[2] = get_irg_frame(current_ir_graph);
1229
1230         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1231         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1232         return new_Proj(irn, mode, pn_Builtin_1_result);
1233 }
1234
1235 /**
1236  * Creates a SymConst node representing a string constant.
1237  *
1238  * @param src_pos    the source position of the string constant
1239  * @param id_prefix  a prefix for the name of the generated string constant
1240  * @param value      the value of the string constant
1241  */
1242 static ir_node *string_to_firm(const source_position_t *const src_pos,
1243                                const char *const id_prefix,
1244                                const string_t *const value)
1245 {
1246         ir_type  *const global_type = get_glob_type();
1247         dbg_info *const dbgi        = get_dbg_info(src_pos);
1248         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1249                                                        ir_type_const_char, dbgi);
1250
1251         ident     *const id     = id_unique(id_prefix);
1252         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1253         set_entity_ld_ident(entity, id);
1254         set_entity_variability(entity, variability_constant);
1255         set_entity_allocation(entity, allocation_static);
1256         set_entity_visibility(entity, visibility_local);
1257
1258         ir_type *const elem_type = ir_type_const_char;
1259         ir_mode *const mode      = get_type_mode(elem_type);
1260
1261         const char* const string = value->begin;
1262         const size_t      slen   = value->size;
1263
1264         set_array_lower_bound_int(type, 0, 0);
1265         set_array_upper_bound_int(type, 0, slen);
1266         set_type_size_bytes(type, slen);
1267         set_type_state(type, layout_fixed);
1268
1269         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1270         for (size_t i = 0; i < slen; ++i) {
1271                 tvs[i] = new_tarval_from_long(string[i], mode);
1272         }
1273
1274         set_array_entity_values(entity, tvs, slen);
1275         free(tvs);
1276
1277         return create_symconst(dbgi, mode_P_data, entity);
1278 }
1279
1280 /**
1281  * Creates a SymConst node representing a string literal.
1282  *
1283  * @param literal   the string literal
1284  */
1285 static ir_node *string_literal_to_firm(
1286                 const string_literal_expression_t* literal)
1287 {
1288         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1289                               &literal->value);
1290 }
1291
1292 /**
1293  * Creates a SymConst node representing a wide string literal.
1294  *
1295  * @param literal   the wide string literal
1296  */
1297 static ir_node *wide_string_literal_to_firm(
1298         const wide_string_literal_expression_t* const literal)
1299 {
1300         ir_type *const global_type = get_glob_type();
1301         ir_type *const elem_type   = ir_type_wchar_t;
1302         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1303         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1304                                                     elem_type, dbgi);
1305
1306         ident     *const id     = id_unique("Lstr.%u");
1307         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1308         set_entity_ld_ident(entity, id);
1309         set_entity_variability(entity, variability_constant);
1310         set_entity_allocation(entity, allocation_static);
1311
1312         ir_mode *const mode      = get_type_mode(elem_type);
1313
1314         const wchar_rep_t *const string = literal->value.begin;
1315         const size_t             slen   = literal->value.size;
1316
1317         set_array_lower_bound_int(type, 0, 0);
1318         set_array_upper_bound_int(type, 0, slen);
1319         set_type_size_bytes(type, slen);
1320         set_type_state(type, layout_fixed);
1321
1322         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1323         for (size_t i = 0; i < slen; ++i) {
1324                 tvs[i] = new_tarval_from_long(string[i], mode);
1325         }
1326
1327         set_array_entity_values(entity, tvs, slen);
1328         free(tvs);
1329
1330         return create_symconst(dbgi, mode_P_data, entity);
1331 }
1332
1333 /**
1334  * Dereference an address.
1335  *
1336  * @param dbgi  debug info
1337  * @param type  the type of the dereferenced result (the points_to type)
1338  * @param addr  the address to dereference
1339  */
1340 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1341                                       ir_node *const addr)
1342 {
1343         ir_type *irtype = get_ir_type(type);
1344         if (is_compound_type(irtype)
1345                         || is_Method_type(irtype)
1346                         || is_Array_type(irtype)) {
1347                 return addr;
1348         }
1349
1350         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1351                                   ? cons_volatile : cons_none;
1352         ir_mode *const mode     = get_type_mode(irtype);
1353         ir_node *const memory   = get_store();
1354         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1355         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1356         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1357
1358         set_store(load_mem);
1359
1360         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1361         return create_conv(dbgi, load_res, mode_arithmetic);
1362 }
1363
1364 /**
1365  * Creates a strict Conv (to the node's mode) if necessary.
1366  *
1367  * @param dbgi  debug info
1368  * @param node  the node to strict conv
1369  */
1370 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1371 {
1372         ir_mode *mode = get_irn_mode(node);
1373
1374         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1375                 return node;
1376         if (!mode_is_float(mode))
1377                 return node;
1378
1379         /* check if there is already a Conv */
1380         if (is_Conv(node)) {
1381                 /* convert it into a strict Conv */
1382                 set_Conv_strict(node, 1);
1383                 return node;
1384         }
1385
1386         /* otherwise create a new one */
1387         return new_d_strictConv(dbgi, node, mode);
1388 }
1389
1390 /**
1391  * Returns the address of a global variable.
1392  *
1393  * @param dbgi      debug info
1394  * @param variable  the variable
1395  */
1396 static ir_node *get_global_var_address(dbg_info *const dbgi,
1397                                        const variable_t *const variable)
1398 {
1399         ir_entity *const irentity = variable->v.entity;
1400         if (variable->thread_local) {
1401                 ir_node *const no_mem = new_NoMem();
1402                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1403                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1404         } else {
1405                 return create_symconst(dbgi, mode_P_data, irentity);
1406         }
1407 }
1408
1409 /**
1410  * Returns the correct base address depending on whether it is a parameter or a
1411  * normal local variable.
1412  */
1413 static ir_node *get_local_frame(ir_entity *const ent)
1414 {
1415         ir_graph      *const irg   = current_ir_graph;
1416         const ir_type *const owner = get_entity_owner(ent);
1417         if (owner == current_outer_frame || owner == current_outer_value_type) {
1418                 assert(current_static_link != NULL);
1419                 return current_static_link;
1420         } else {
1421                 return get_irg_frame(irg);
1422         }
1423 }
1424
1425 /**
1426  * Keep all memory edges of the given block.
1427  */
1428 static void keep_all_memory(ir_node *block)
1429 {
1430         ir_node *old = get_cur_block();
1431
1432         set_cur_block(block);
1433         keep_alive(get_store());
1434         /* TODO: keep all memory edges from restricted pointers */
1435         set_cur_block(old);
1436 }
1437
1438 static ir_node *reference_expression_enum_value_to_firm(
1439                 const reference_expression_t *ref)
1440 {
1441         entity_t *entity = ref->entity;
1442         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1443         /* make sure the type is constructed */
1444         (void) get_ir_type(type);
1445
1446         return new_Const(entity->enum_value.tv);
1447 }
1448
1449 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1450 {
1451         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1452         entity_t *entity = ref->entity;
1453         assert(is_declaration(entity));
1454         type_t   *type   = skip_typeref(entity->declaration.type);
1455
1456         /* make sure the type is constructed */
1457         (void) get_ir_type(type);
1458
1459         /* for gcc compatibility we have to produce (dummy) addresses for some
1460          * builtins */
1461         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1462                 if (warning.other) {
1463                         warningf(&ref->base.source_position,
1464                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1465                 }
1466
1467                 /* simply create a NULL pointer */
1468                 ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1469                 ir_node  *res  = new_Const_long(mode, 0);
1470
1471                 return res;
1472         }
1473
1474         switch ((declaration_kind_t) entity->declaration.kind) {
1475         case DECLARATION_KIND_UNKNOWN:
1476                 break;
1477
1478         case DECLARATION_KIND_LOCAL_VARIABLE: {
1479                 ir_mode *const mode  = get_ir_mode_storage(type);
1480                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1481                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1482         }
1483         case DECLARATION_KIND_PARAMETER: {
1484                 ir_mode *const mode  = get_ir_mode_storage(type);
1485                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1486                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1487         }
1488         case DECLARATION_KIND_FUNCTION: {
1489                 ir_mode *const mode = get_ir_mode_storage(type);
1490                 return create_symconst(dbgi, mode, entity->function.irentity);
1491         }
1492         case DECLARATION_KIND_INNER_FUNCTION: {
1493                 ir_mode *const mode = get_ir_mode_storage(type);
1494                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1495                         /* inner function not using the closure */
1496                         return create_symconst(dbgi, mode, entity->function.irentity);
1497                 } else {
1498                         /* need trampoline here */
1499                         return create_trampoline(dbgi, mode, entity->function.irentity);
1500                 }
1501         }
1502         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1503                 const variable_t *variable = &entity->variable;
1504                 ir_node *const addr = get_global_var_address(dbgi, variable);
1505                 return deref_address(dbgi, variable->base.type, addr);
1506         }
1507
1508         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1509                 ir_entity *irentity = entity->variable.v.entity;
1510                 ir_node   *frame    = get_local_frame(irentity);
1511                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1512                 return deref_address(dbgi, entity->declaration.type, sel);
1513         }
1514         case DECLARATION_KIND_PARAMETER_ENTITY: {
1515                 ir_entity *irentity = entity->parameter.v.entity;
1516                 ir_node   *frame    = get_local_frame(irentity);
1517                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518                 return deref_address(dbgi, entity->declaration.type, sel);
1519         }
1520
1521         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1522                 return entity->variable.v.vla_base;
1523
1524         case DECLARATION_KIND_COMPOUND_MEMBER:
1525                 panic("not implemented reference type");
1526         }
1527
1528         panic("reference to declaration with unknown type found");
1529 }
1530
1531 static ir_node *reference_addr(const reference_expression_t *ref)
1532 {
1533         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1534         entity_t *entity = ref->entity;
1535         assert(is_declaration(entity));
1536
1537         switch((declaration_kind_t) entity->declaration.kind) {
1538         case DECLARATION_KIND_UNKNOWN:
1539                 break;
1540         case DECLARATION_KIND_PARAMETER:
1541         case DECLARATION_KIND_LOCAL_VARIABLE:
1542                 /* you can store to a local variable (so we don't panic but return NULL
1543                  * as an indicator for no real address) */
1544                 return NULL;
1545         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1546                 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1547                 return addr;
1548         }
1549         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1550                 ir_entity *irentity = entity->variable.v.entity;
1551                 ir_node   *frame    = get_local_frame(irentity);
1552                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1553
1554                 return sel;
1555         }
1556         case DECLARATION_KIND_PARAMETER_ENTITY: {
1557                 ir_entity *irentity = entity->parameter.v.entity;
1558                 ir_node   *frame    = get_local_frame(irentity);
1559                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1560
1561                 return sel;
1562         }
1563
1564         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1565                 return entity->variable.v.vla_base;
1566
1567         case DECLARATION_KIND_FUNCTION: {
1568                 type_t  *const type = skip_typeref(entity->declaration.type);
1569                 ir_mode *const mode = get_ir_mode_storage(type);
1570                 return create_symconst(dbgi, mode, entity->function.irentity);
1571         }
1572
1573         case DECLARATION_KIND_INNER_FUNCTION: {
1574                 type_t  *const type = skip_typeref(entity->declaration.type);
1575                 ir_mode *const mode = get_ir_mode_storage(type);
1576                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1577                         /* inner function not using the closure */
1578                         return create_symconst(dbgi, mode, entity->function.irentity);
1579                 } else {
1580                         /* need trampoline here */
1581                         return create_trampoline(dbgi, mode, entity->function.irentity);
1582                 }
1583         }
1584
1585         case DECLARATION_KIND_COMPOUND_MEMBER:
1586                 panic("not implemented reference type");
1587         }
1588
1589         panic("reference to declaration with unknown type found");
1590 }
1591
1592 /**
1593  * Generate an unary builtin.
1594  *
1595  * @param kind           the builtin kind to generate
1596  * @param op             the operand
1597  * @param function_type  the function type for the GNU builtin routine
1598  * @param db             debug info
1599  */
1600 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1601 {
1602         ir_node *in[1];
1603         in[0] = expression_to_firm(op);
1604
1605         ir_type *tp  = get_ir_type(function_type);
1606         ir_type *res = get_method_res_type(tp, 0);
1607         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1608         set_irn_pinned(irn, op_pin_state_floats);
1609         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1610 }
1611
1612 /**
1613  * Generate a pinned unary builtin.
1614  *
1615  * @param kind           the builtin kind to generate
1616  * @param op             the operand
1617  * @param function_type  the function type for the GNU builtin routine
1618  * @param db             debug info
1619  */
1620 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1621 {
1622         ir_node *in[1];
1623         in[0] = expression_to_firm(op);
1624
1625         ir_type *tp  = get_ir_type(function_type);
1626         ir_type *res = get_method_res_type(tp, 0);
1627         ir_node *mem = get_store();
1628         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1629         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1630         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1631 }
1632
1633
1634 /**
1635  * Generate an binary-void-return builtin.
1636  *
1637  * @param kind           the builtin kind to generate
1638  * @param op1            the first operand
1639  * @param op2            the second operand
1640  * @param function_type  the function type for the GNU builtin routine
1641  * @param db             debug info
1642  */
1643 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1, expression_t *op2,
1644                                                                            type_t *function_type, dbg_info *db)
1645 {
1646         ir_node *in[2];
1647         in[0] = expression_to_firm(op1);
1648         in[1] = expression_to_firm(op2);
1649
1650         ir_type *tp  = get_ir_type(function_type);
1651         ir_node *mem = get_store();
1652         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1653         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1654         return NULL;
1655 }
1656
1657 /**
1658  * Transform calls to builtin functions.
1659  */
1660 static ir_node *process_builtin_call(const call_expression_t *call)
1661 {
1662         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1663
1664         assert(call->function->kind == EXPR_REFERENCE);
1665         reference_expression_t *builtin = &call->function->reference;
1666
1667         type_t *type = skip_typeref(builtin->base.type);
1668         assert(is_type_pointer(type));
1669
1670         type_t   *function_type = skip_typeref(type->pointer.points_to);
1671
1672         switch (builtin->entity->function.btk) {
1673         case bk_gnu_builtin_alloca: {
1674                 if (call->arguments == NULL || call->arguments->next != NULL) {
1675                         panic("invalid number of parameters on __builtin_alloca");
1676                 }
1677                 expression_t *argument = call->arguments->expression;
1678                 ir_node      *size     = expression_to_firm(argument);
1679
1680                 ir_node *store  = get_store();
1681                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1682                                               stack_alloc);
1683                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1684                 set_store(proj_m);
1685                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1686
1687                 return res;
1688         }
1689
1690         case bk_gnu_builtin_huge_val:
1691         case bk_gnu_builtin_inf:
1692         case bk_gnu_builtin_inff:
1693         case bk_gnu_builtin_infl: {
1694                 type_t  *type = function_type->function.return_type;
1695                 ir_mode *mode = get_ir_mode_arithmetic(type);
1696                 tarval  *tv   = get_mode_infinite(mode);
1697                 ir_node *res  = new_d_Const(dbgi, tv);
1698                 return   res;
1699         }
1700         case bk_gnu_builtin_nan:
1701         case bk_gnu_builtin_nanf:
1702         case bk_gnu_builtin_nanl: {
1703                 /* Ignore string for now... */
1704                 assert(is_type_function(function_type));
1705                 type_t  *type = function_type->function.return_type;
1706                 ir_mode *mode = get_ir_mode_arithmetic(type);
1707                 tarval  *tv   = get_mode_NAN(mode);
1708                 ir_node *res  = new_d_Const(dbgi, tv);
1709                 return res;
1710         }
1711         case bk_gnu_builtin_expect: {
1712                 expression_t *argument = call->arguments->expression;
1713                 return _expression_to_firm(argument);
1714         }
1715         case bk_gnu_builtin_va_end:
1716                 /* evaluate the argument of va_end for its side effects */
1717                 _expression_to_firm(call->arguments->expression);
1718                 return NULL;
1719         case bk_gnu_builtin_frame_address: {
1720                 expression_t *const expression = call->arguments->expression;
1721                 bool val = fold_constant_to_bool(expression);
1722                 if (!val) {
1723                         /* the nice case */
1724                         return get_irg_frame(current_ir_graph);
1725                 } else {
1726                         /* get the argument */
1727                         ir_node *in[2];
1728
1729                         in[0] = expression_to_firm(expression);
1730                         in[1] = get_irg_frame(current_ir_graph);
1731                         ir_type *tp  = get_ir_type(function_type);
1732                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1733                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1734                 }
1735         }
1736         case bk_gnu_builtin_return_address: {
1737
1738                 expression_t *const expression = call->arguments->expression;
1739                 ir_node *in[2];
1740
1741                 in[0] = expression_to_firm(expression);
1742                 in[1] = get_irg_frame(current_ir_graph);
1743                 ir_type *tp  = get_ir_type(function_type);
1744                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1745                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1746         }
1747         case bk_gnu_builtin_ffs:
1748                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1749         case bk_gnu_builtin_clz:
1750                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1751         case bk_gnu_builtin_ctz:
1752                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1753         case bk_gnu_builtin_popcount:
1754         case bk_ms__popcount:
1755                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1756         case bk_gnu_builtin_parity:
1757                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1758         case bk_gnu_builtin_prefetch: {
1759                 call_argument_t *const args = call->arguments;
1760                 expression_t *const addr    = args->expression;
1761                 ir_node *in[3];
1762
1763                 in[0] = _expression_to_firm(addr);
1764                 if (args->next != NULL) {
1765                         expression_t *const rw = args->next->expression;
1766
1767                         in[1] = _expression_to_firm(rw);
1768
1769                         if (args->next->next != NULL) {
1770                                 expression_t *const locality = args->next->next->expression;
1771
1772                                 in[2] = expression_to_firm(locality);
1773                         } else {
1774                                 in[2] = new_Const_long(mode_int, 3);
1775                         }
1776                 } else {
1777                         in[1] = new_Const_long(mode_int, 0);
1778                         in[2] = new_Const_long(mode_int, 3);
1779                 }
1780                 ir_type *tp  = get_ir_type(function_type);
1781                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1782                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1783                 return NULL;
1784         }
1785         case bk_gnu_builtin_trap:
1786         case bk_ms__ud2:
1787         {
1788                 ir_type *tp  = get_ir_type(function_type);
1789                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1790                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1791                 return NULL;
1792         }
1793         case bk_ms__debugbreak: {
1794                 ir_type *tp  = get_ir_type(function_type);
1795                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1796                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1797                 return NULL;
1798         }
1799         case bk_ms_ReturnAddress: {
1800                 ir_node *in[2];
1801
1802                 in[0] = new_Const_long(mode_int, 0);
1803                 in[1] = get_irg_frame(current_ir_graph);
1804                 ir_type *tp  = get_ir_type(function_type);
1805                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1806                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1807         }
1808         case bk_ms_rotl:
1809         case bk_ms_rotl64: {
1810                 ir_node *val  = expression_to_firm(call->arguments->expression);
1811                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1812                 ir_mode *mode = get_irn_mode(val);
1813                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1814         }
1815         case bk_ms_rotr:
1816         case bk_ms_rotr64: {
1817                 ir_node *val  = expression_to_firm(call->arguments->expression);
1818                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1819                 ir_mode *mode = get_irn_mode(val);
1820                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1821                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1822                 return new_d_Rotl(dbgi, val, sub, mode);
1823         }
1824         case bk_ms_byteswap_ushort:
1825         case bk_ms_byteswap_ulong:
1826         case bk_ms_byteswap_uint64:
1827                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1828         case bk_ms__inbyte:
1829         case bk_ms__inword:
1830         case bk_ms__indword:
1831                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1832         case bk_ms__outbyte:
1833         case bk_ms__outword:
1834         case bk_ms__outdword:
1835                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1836                         call->arguments->next->expression, function_type, dbgi);
1837         default:
1838                 panic("unsupported builtin found");
1839         }
1840 }
1841
1842 /**
1843  * Transform a call expression.
1844  * Handles some special cases, like alloca() calls, which must be resolved
1845  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1846  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1847  * handled right...
1848  */
1849 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1850 {
1851         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1852         assert(get_cur_block() != NULL);
1853
1854         expression_t *function = call->function;
1855         if (function->kind == EXPR_REFERENCE) {
1856                 const reference_expression_t *ref    = &function->reference;
1857                 entity_t                     *entity = ref->entity;
1858
1859                 if (entity->kind == ENTITY_FUNCTION) {
1860                         if (entity->function.btk != bk_none) {
1861                                 return process_builtin_call(call);
1862                         }
1863
1864                         ir_entity *irentity = entity->function.irentity;
1865                         if (irentity == NULL)
1866                                 irentity = get_function_entity(entity, NULL);
1867
1868                         if (irentity == rts_entities[rts_alloca]) {
1869                                 /* handle alloca() call */
1870                                 expression_t *argument = call->arguments->expression;
1871                                 ir_node      *size     = expression_to_firm(argument);
1872                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1873
1874                                 size = create_conv(dbgi, size, mode);
1875
1876                                 ir_node  *store  = get_store();
1877                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1878                                                                firm_unknown_type, stack_alloc);
1879                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1880                                 set_store(proj_m);
1881                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1882
1883                                 return res;
1884                         }
1885                 }
1886         }
1887         ir_node *callee = expression_to_firm(function);
1888
1889         type_t *type = skip_typeref(function->base.type);
1890         assert(is_type_pointer(type));
1891         pointer_type_t *pointer_type = &type->pointer;
1892         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1893         assert(is_type_function(points_to));
1894         function_type_t *function_type = &points_to->function;
1895
1896         int      n_parameters = 0;
1897         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1898         ir_type *new_method_type = NULL;
1899         if (function_type->variadic || function_type->unspecified_parameters) {
1900                 const call_argument_t *argument = call->arguments;
1901                 for ( ; argument != NULL; argument = argument->next) {
1902                         ++n_parameters;
1903                 }
1904
1905                 /* we need to construct a new method type matching the call
1906                  * arguments... */
1907                 int n_res       = get_method_n_ress(ir_method_type);
1908                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1909                                                     n_parameters, n_res, dbgi);
1910                 set_method_calling_convention(new_method_type,
1911                                get_method_calling_convention(ir_method_type));
1912                 set_method_additional_properties(new_method_type,
1913                                get_method_additional_properties(ir_method_type));
1914                 set_method_variadicity(new_method_type,
1915                                        get_method_variadicity(ir_method_type));
1916
1917                 for (int i = 0; i < n_res; ++i) {
1918                         set_method_res_type(new_method_type, i,
1919                                             get_method_res_type(ir_method_type, i));
1920                 }
1921                 argument = call->arguments;
1922                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1923                         expression_t *expression = argument->expression;
1924                         ir_type      *irtype     = get_ir_type(expression->base.type);
1925                         set_method_param_type(new_method_type, i, irtype);
1926                 }
1927                 ir_method_type = new_method_type;
1928         } else {
1929                 n_parameters = get_method_n_params(ir_method_type);
1930         }
1931
1932         ir_node *in[n_parameters];
1933
1934         const call_argument_t *argument = call->arguments;
1935         for (int n = 0; n < n_parameters; ++n) {
1936                 expression_t *expression = argument->expression;
1937                 ir_node      *arg_node   = expression_to_firm(expression);
1938
1939                 type_t  *type = skip_typeref(expression->base.type);
1940                 if (!is_type_compound(type)) {
1941                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1942                         arg_node      = create_conv(dbgi, arg_node, mode);
1943                         arg_node      = do_strict_conv(dbgi, arg_node);
1944                 }
1945
1946                 in[n] = arg_node;
1947
1948                 argument = argument->next;
1949         }
1950
1951         ir_node  *store = get_store();
1952         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1953                                      ir_method_type);
1954         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1955         set_store(mem);
1956
1957         type_t  *return_type = skip_typeref(function_type->return_type);
1958         ir_node *result      = NULL;
1959
1960         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1961                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1962
1963                 if (is_type_scalar(return_type)) {
1964                         ir_mode *mode       = get_ir_mode_storage(return_type);
1965                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1966                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1967                         result              = create_conv(NULL, result, mode_arith);
1968                 } else {
1969                         ir_mode *mode = mode_P_data;
1970                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1971                 }
1972         }
1973
1974         if (function->kind == EXPR_REFERENCE &&
1975             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1976                 /* A dead end:  Keep the Call and the Block.  Also place all further
1977                  * nodes into a new and unreachable block. */
1978                 keep_alive(node);
1979                 keep_alive(get_cur_block());
1980                 new_Block(0, NULL);
1981         }
1982
1983         return result;
1984 }
1985
1986 static void statement_to_firm(statement_t *statement);
1987 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1988
1989 static ir_node *expression_to_addr(const expression_t *expression);
1990 static ir_node *create_condition_evaluation(const expression_t *expression,
1991                                             ir_node *true_block,
1992                                             ir_node *false_block);
1993
1994 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1995                          ir_node *value)
1996 {
1997         if (!is_type_compound(type)) {
1998                 ir_mode *mode = get_ir_mode_storage(type);
1999                 value         = create_conv(dbgi, value, mode);
2000                 value         = do_strict_conv(dbgi, value);
2001         }
2002
2003         ir_node *memory = get_store();
2004
2005         if (is_type_scalar(type)) {
2006                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2007                                       ? cons_volatile : cons_none;
2008                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2009                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2010                 set_store(store_mem);
2011         } else {
2012                 ir_type *irtype    = get_ir_type(type);
2013                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2014                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2015                 set_store(copyb_mem);
2016         }
2017 }
2018
2019 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2020 {
2021         tarval *all_one   = get_mode_all_one(mode);
2022         int     mode_size = get_mode_size_bits(mode);
2023
2024         assert(offset >= 0);
2025         assert(size   >= 0);
2026         assert(offset + size <= mode_size);
2027         if (size == mode_size) {
2028                 return all_one;
2029         }
2030
2031         long    shiftr    = get_mode_size_bits(mode) - size;
2032         long    shiftl    = offset;
2033         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2034         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2035         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2036         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2037
2038         return mask1;
2039 }
2040
2041 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2042                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2043 {
2044         ir_type *entity_type = get_entity_type(entity);
2045         ir_type *base_type   = get_primitive_base_type(entity_type);
2046         assert(base_type != NULL);
2047         ir_mode *mode        = get_type_mode(base_type);
2048
2049         value = create_conv(dbgi, value, mode);
2050
2051         /* kill upper bits of value and shift to right position */
2052         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2053         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2054
2055         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
2056         ir_node *mask_node       = new_d_Const(dbgi, mask);
2057         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2058         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2059         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
2060         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2061
2062         /* load current value */
2063         ir_node  *mem             = get_store();
2064         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
2065                                         set_volatile ? cons_volatile : cons_none);
2066         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2067         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2068         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2069         tarval   *inv_mask        = tarval_not(shift_mask);
2070         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2071         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2072
2073         /* construct new value and store */
2074         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2075         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2076                                          set_volatile ? cons_volatile : cons_none);
2077         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2078         set_store(store_mem);
2079
2080         return value_masked;
2081 }
2082
2083 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2084                 ir_node *addr)
2085 {
2086         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2087         type_t   *type     = expression->base.type;
2088         ir_mode  *mode     = get_ir_mode_storage(type);
2089         ir_node  *mem      = get_store();
2090         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2091         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2092         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2093
2094         load_res           = create_conv(dbgi, load_res, mode_int);
2095
2096         set_store(load_mem);
2097
2098         /* kill upper bits */
2099         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2100         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2101         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2102         ir_type   *entity_type  = get_entity_type(entity);
2103         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2104         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2105         assert(shift_bitsl >= 0);
2106         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2107         ir_node   *countl       = new_d_Const(dbgi, tvl);
2108         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2109
2110         long       shift_bitsr  = bitoffset + shift_bitsl;
2111         assert(shift_bitsr <= (long) machine_size);
2112         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2113         ir_node   *countr       = new_d_Const(dbgi, tvr);
2114         ir_node   *shiftr;
2115         if (mode_is_signed(mode)) {
2116                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2117         } else {
2118                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2119         }
2120
2121         return create_conv(dbgi, shiftr, mode);
2122 }
2123
2124 /* make sure the selected compound type is constructed */
2125 static void construct_select_compound(const select_expression_t *expression)
2126 {
2127         type_t *type = skip_typeref(expression->compound->base.type);
2128         if (is_type_pointer(type)) {
2129                 type = type->pointer.points_to;
2130         }
2131         (void) get_ir_type(type);
2132 }
2133
2134 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2135                                               ir_node *value, ir_node *addr)
2136 {
2137         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2138         type_t   *type = skip_typeref(expression->base.type);
2139
2140         if (!is_type_compound(type)) {
2141                 ir_mode  *mode = get_ir_mode_storage(type);
2142                 value          = create_conv(dbgi, value, mode);
2143                 value          = do_strict_conv(dbgi, value);
2144         }
2145
2146         if (expression->kind == EXPR_REFERENCE) {
2147                 const reference_expression_t *ref = &expression->reference;
2148
2149                 entity_t *entity = ref->entity;
2150                 assert(is_declaration(entity));
2151                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2152                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2153                         set_value(entity->variable.v.value_number, value);
2154                         return value;
2155                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2156                         set_value(entity->parameter.v.value_number, value);
2157                         return value;
2158                 }
2159         }
2160
2161         if (addr == NULL)
2162                 addr = expression_to_addr(expression);
2163         assert(addr != NULL);
2164
2165         if (expression->kind == EXPR_SELECT) {
2166                 const select_expression_t *select = &expression->select;
2167
2168                 construct_select_compound(select);
2169
2170                 entity_t *entity = select->compound_entry;
2171                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2172                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2173                         ir_entity *irentity = entity->compound_member.entity;
2174                         bool       set_volatile
2175                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2176                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2177                                                        set_volatile);
2178                         return value;
2179                 }
2180         }
2181
2182         assign_value(dbgi, addr, type, value);
2183         return value;
2184 }
2185
2186 static void set_value_for_expression(const expression_t *expression,
2187                                      ir_node *value)
2188 {
2189         set_value_for_expression_addr(expression, value, NULL);
2190 }
2191
2192 static ir_node *get_value_from_lvalue(const expression_t *expression,
2193                                       ir_node *addr)
2194 {
2195         if (expression->kind == EXPR_REFERENCE) {
2196                 const reference_expression_t *ref = &expression->reference;
2197
2198                 entity_t *entity = ref->entity;
2199                 assert(entity->kind == ENTITY_VARIABLE
2200                                 || entity->kind == ENTITY_PARAMETER);
2201                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2202                 int value_number;
2203                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2204                         value_number = entity->variable.v.value_number;
2205                         assert(addr == NULL);
2206                         type_t  *type = skip_typeref(expression->base.type);
2207                         ir_mode *mode = get_ir_mode_storage(type);
2208                         ir_node *res  = get_value(value_number, mode);
2209                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2210                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2211                         value_number = entity->parameter.v.value_number;
2212                         assert(addr == NULL);
2213                         type_t  *type = skip_typeref(expression->base.type);
2214                         ir_mode *mode = get_ir_mode_storage(type);
2215                         ir_node *res  = get_value(value_number, mode);
2216                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2217                 }
2218         }
2219
2220         assert(addr != NULL);
2221         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2222
2223         ir_node *value;
2224         if (expression->kind == EXPR_SELECT &&
2225             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2226             construct_select_compound(&expression->select);
2227                 value = bitfield_extract_to_firm(&expression->select, addr);
2228         } else {
2229                 value = deref_address(dbgi, expression->base.type, addr);
2230         }
2231
2232         return value;
2233 }
2234
2235
2236 static ir_node *create_incdec(const unary_expression_t *expression)
2237 {
2238         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2239         const expression_t *value_expr = expression->value;
2240         ir_node            *addr       = expression_to_addr(value_expr);
2241         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2242
2243         type_t  *type = skip_typeref(expression->base.type);
2244         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2245
2246         ir_node *offset;
2247         if (is_type_pointer(type)) {
2248                 pointer_type_t *pointer_type = &type->pointer;
2249                 offset = get_type_size_node(pointer_type->points_to);
2250         } else {
2251                 assert(is_type_arithmetic(type));
2252                 offset = new_Const(get_mode_one(mode));
2253         }
2254
2255         ir_node *result;
2256         ir_node *store_value;
2257         switch(expression->base.kind) {
2258         case EXPR_UNARY_POSTFIX_INCREMENT:
2259                 result      = value;
2260                 store_value = new_d_Add(dbgi, value, offset, mode);
2261                 break;
2262         case EXPR_UNARY_POSTFIX_DECREMENT:
2263                 result      = value;
2264                 store_value = new_d_Sub(dbgi, value, offset, mode);
2265                 break;
2266         case EXPR_UNARY_PREFIX_INCREMENT:
2267                 result      = new_d_Add(dbgi, value, offset, mode);
2268                 store_value = result;
2269                 break;
2270         case EXPR_UNARY_PREFIX_DECREMENT:
2271                 result      = new_d_Sub(dbgi, value, offset, mode);
2272                 store_value = result;
2273                 break;
2274         default:
2275                 panic("no incdec expr in create_incdec");
2276         }
2277
2278         set_value_for_expression_addr(value_expr, store_value, addr);
2279
2280         return result;
2281 }
2282
2283 static bool is_local_variable(expression_t *expression)
2284 {
2285         if (expression->kind != EXPR_REFERENCE)
2286                 return false;
2287         reference_expression_t *ref_expr = &expression->reference;
2288         entity_t               *entity   = ref_expr->entity;
2289         if (entity->kind != ENTITY_VARIABLE)
2290                 return false;
2291         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2292         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2293 }
2294
2295 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2296 {
2297         switch(kind) {
2298         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2299         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2300         case EXPR_BINARY_NOTEQUAL:
2301                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2302         case EXPR_BINARY_ISLESS:
2303         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2304         case EXPR_BINARY_ISLESSEQUAL:
2305         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2306         case EXPR_BINARY_ISGREATER:
2307         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2308         case EXPR_BINARY_ISGREATEREQUAL:
2309         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2310         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2311
2312         default:
2313                 break;
2314         }
2315         panic("trying to get pn_Cmp from non-comparison binexpr type");
2316 }
2317
2318 /**
2319  * Handle the assume optimizer hint: check if a Confirm
2320  * node can be created.
2321  *
2322  * @param dbi    debug info
2323  * @param expr   the IL assume expression
2324  *
2325  * we support here only some simple cases:
2326  *  - var rel const
2327  *  - const rel val
2328  *  - var rel var
2329  */
2330 static ir_node *handle_assume_compare(dbg_info *dbi,
2331                                       const binary_expression_t *expression)
2332 {
2333         expression_t *op1 = expression->left;
2334         expression_t *op2 = expression->right;
2335         entity_t     *var2, *var = NULL;
2336         ir_node      *res = NULL;
2337         pn_Cmp        cmp_val;
2338
2339         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2340
2341         if (is_local_variable(op1) && is_local_variable(op2)) {
2342         var  = op1->reference.entity;
2343             var2 = op2->reference.entity;
2344
2345                 type_t  *const type = skip_typeref(var->declaration.type);
2346                 ir_mode *const mode = get_ir_mode_storage(type);
2347
2348                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2349                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2350
2351                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2352                 set_value(var2->variable.v.value_number, res);
2353
2354                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2355                 set_value(var->variable.v.value_number, res);
2356
2357                 return res;
2358         }
2359
2360         expression_t *con;
2361         if (is_local_variable(op1) && is_constant_expression(op2)) {
2362                 var = op1->reference.entity;
2363                 con = op2;
2364         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2365                 cmp_val = get_inversed_pnc(cmp_val);
2366                 var = op2->reference.entity;
2367                 con = op1;
2368         }
2369
2370         if (var != NULL) {
2371                 type_t  *const type = skip_typeref(var->declaration.type);
2372                 ir_mode *const mode = get_ir_mode_storage(type);
2373
2374                 res = get_value(var->variable.v.value_number, mode);
2375                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2376                 set_value(var->variable.v.value_number, res);
2377         }
2378         return res;
2379 }
2380
2381 /**
2382  * Handle the assume optimizer hint.
2383  *
2384  * @param dbi    debug info
2385  * @param expr   the IL assume expression
2386  */
2387 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2388 {
2389         switch(expression->kind) {
2390         case EXPR_BINARY_EQUAL:
2391         case EXPR_BINARY_NOTEQUAL:
2392         case EXPR_BINARY_LESS:
2393         case EXPR_BINARY_LESSEQUAL:
2394         case EXPR_BINARY_GREATER:
2395         case EXPR_BINARY_GREATEREQUAL:
2396                 return handle_assume_compare(dbi, &expression->binary);
2397         default:
2398                 return NULL;
2399         }
2400 }
2401
2402 static ir_node *create_cast(dbg_info *dbgi,     ir_node *value_node,
2403                             type_t *from_type, type_t *type)
2404 {
2405         type = skip_typeref(type);
2406         if (!is_type_scalar(type)) {
2407                 /* make sure firm type is constructed */
2408                 (void) get_ir_type(type);
2409                 return value_node;
2410         }
2411
2412         from_type     = skip_typeref(from_type);
2413         ir_mode *mode = get_ir_mode_storage(type);
2414         /* check for conversion from / to __based types */
2415         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2416                 const variable_t *from_var = from_type->pointer.base_variable;
2417                 const variable_t *to_var   = type->pointer.base_variable;
2418                 if (from_var != to_var) {
2419                         if (from_var != NULL) {
2420                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2421                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2422                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2423                         }
2424                         if (to_var != NULL) {
2425                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2426                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2427                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2428                         }
2429                 }
2430         }
2431
2432         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2433                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2434                  * convert to mode_b so we only get a 0/1 value */
2435                 value_node = create_conv(dbgi, value_node, mode_b);
2436         }
2437
2438         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2439         ir_node *node       = create_conv(dbgi, value_node, mode);
2440         node                = do_strict_conv(dbgi, node);
2441         node                = create_conv(dbgi, node, mode_arith);
2442
2443         return node;
2444 }
2445
2446 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2447 {
2448         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2449         type_t   *type = skip_typeref(expression->base.type);
2450
2451         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2452                 return expression_to_addr(expression->value);
2453
2454         const expression_t *value = expression->value;
2455
2456         switch(expression->base.kind) {
2457         case EXPR_UNARY_NEGATE: {
2458                 ir_node *value_node = expression_to_firm(value);
2459                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2460                 return new_d_Minus(dbgi, value_node, mode);
2461         }
2462         case EXPR_UNARY_PLUS:
2463                 return expression_to_firm(value);
2464         case EXPR_UNARY_BITWISE_NEGATE: {
2465                 ir_node *value_node = expression_to_firm(value);
2466                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2467                 return new_d_Not(dbgi, value_node, mode);
2468         }
2469         case EXPR_UNARY_NOT: {
2470                 ir_node *value_node = _expression_to_firm(value);
2471                 value_node          = create_conv(dbgi, value_node, mode_b);
2472                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2473                 return res;
2474         }
2475         case EXPR_UNARY_DEREFERENCE: {
2476                 ir_node *value_node = expression_to_firm(value);
2477                 type_t  *value_type = skip_typeref(value->base.type);
2478                 assert(is_type_pointer(value_type));
2479
2480                 /* check for __based */
2481                 const variable_t *const base_var = value_type->pointer.base_variable;
2482                 if (base_var != NULL) {
2483                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2484                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2485                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2486                 }
2487                 type_t  *points_to  = value_type->pointer.points_to;
2488                 return deref_address(dbgi, points_to, value_node);
2489         }
2490         case EXPR_UNARY_POSTFIX_INCREMENT:
2491         case EXPR_UNARY_POSTFIX_DECREMENT:
2492         case EXPR_UNARY_PREFIX_INCREMENT:
2493         case EXPR_UNARY_PREFIX_DECREMENT:
2494                 return create_incdec(expression);
2495         case EXPR_UNARY_CAST_IMPLICIT:
2496         case EXPR_UNARY_CAST: {
2497                 ir_node *value_node = expression_to_firm(value);
2498                 type_t  *from_type  = value->base.type;
2499                 return create_cast(dbgi, value_node, from_type, type);
2500         }
2501         case EXPR_UNARY_ASSUME:
2502                 if (firm_opt.confirm)
2503                         return handle_assume(dbgi, value);
2504                 else
2505                         return NULL;
2506
2507         default:
2508                 break;
2509         }
2510         panic("invalid UNEXPR type found");
2511 }
2512
2513 /**
2514  * produces a 0/1 depending of the value of a mode_b node
2515  */
2516 static ir_node *produce_condition_result(const expression_t *expression,
2517                                          ir_mode *mode, dbg_info *dbgi)
2518 {
2519         ir_node *cur_block = get_cur_block();
2520
2521         ir_node *one_block = new_immBlock();
2522         set_cur_block(one_block);
2523         ir_node *one       = new_Const(get_mode_one(mode));
2524         ir_node *jmp_one   = new_d_Jmp(dbgi);
2525
2526         ir_node *zero_block = new_immBlock();
2527         set_cur_block(zero_block);
2528         ir_node *zero       = new_Const(get_mode_null(mode));
2529         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2530
2531         set_cur_block(cur_block);
2532         create_condition_evaluation(expression, one_block, zero_block);
2533         mature_immBlock(one_block);
2534         mature_immBlock(zero_block);
2535
2536         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2537         new_Block(2, in_cf);
2538
2539         ir_node *in[2] = { one, zero };
2540         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2541
2542         return val;
2543 }
2544
2545 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2546                 ir_node *value, type_t *type)
2547 {
2548         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2549         assert(is_type_pointer(type));
2550         pointer_type_t *const pointer_type = &type->pointer;
2551         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2552         ir_node        *      elem_size    = get_type_size_node(points_to);
2553         elem_size                          = create_conv(dbgi, elem_size, mode);
2554         value                              = create_conv(dbgi, value,     mode);
2555         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2556         return mul;
2557 }
2558
2559 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2560                           ir_node *left, ir_node *right)
2561 {
2562         ir_mode  *mode;
2563         type_t   *type_left  = skip_typeref(expression->left->base.type);
2564         type_t   *type_right = skip_typeref(expression->right->base.type);
2565
2566         expression_kind_t kind = expression->base.kind;
2567
2568         switch (kind) {
2569         case EXPR_BINARY_SHIFTLEFT:
2570         case EXPR_BINARY_SHIFTRIGHT:
2571         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2572         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2573                 mode  = get_irn_mode(left);
2574                 right = create_conv(dbgi, right, mode_uint);
2575                 break;
2576
2577         case EXPR_BINARY_SUB:
2578                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2579                         const pointer_type_t *const ptr_type = &type_left->pointer;
2580
2581                         mode = get_ir_mode_arithmetic(expression->base.type);
2582                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2583                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2584                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2585                         ir_node *const no_mem    = new_NoMem();
2586                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2587                                                                                                    mode, op_pin_state_floats);
2588                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2589                 }
2590                 /* fallthrough */
2591         case EXPR_BINARY_SUB_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                 }
2597                 goto normal_node;
2598
2599         case EXPR_BINARY_ADD:
2600         case EXPR_BINARY_ADD_ASSIGN:
2601                 if (is_type_pointer(type_left)) {
2602                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2603                         mode  = get_ir_mode_arithmetic(type_left);
2604                         break;
2605                 } else if (is_type_pointer(type_right)) {
2606                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2607                         mode  = get_ir_mode_arithmetic(type_right);
2608                         break;
2609                 }
2610                 goto normal_node;
2611
2612         default:
2613 normal_node:
2614                 mode = get_ir_mode_arithmetic(type_right);
2615                 left = create_conv(dbgi, left, mode);
2616                 break;
2617         }
2618
2619         switch (kind) {
2620         case EXPR_BINARY_ADD_ASSIGN:
2621         case EXPR_BINARY_ADD:
2622                 return new_d_Add(dbgi, left, right, mode);
2623         case EXPR_BINARY_SUB_ASSIGN:
2624         case EXPR_BINARY_SUB:
2625                 return new_d_Sub(dbgi, left, right, mode);
2626         case EXPR_BINARY_MUL_ASSIGN:
2627         case EXPR_BINARY_MUL:
2628                 return new_d_Mul(dbgi, left, right, mode);
2629         case EXPR_BINARY_BITWISE_AND:
2630         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2631                 return new_d_And(dbgi, left, right, mode);
2632         case EXPR_BINARY_BITWISE_OR:
2633         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2634                 return new_d_Or(dbgi, left, right, mode);
2635         case EXPR_BINARY_BITWISE_XOR:
2636         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2637                 return new_d_Eor(dbgi, left, right, mode);
2638         case EXPR_BINARY_SHIFTLEFT:
2639         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2640                 return new_d_Shl(dbgi, left, right, mode);
2641         case EXPR_BINARY_SHIFTRIGHT:
2642         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2643                 if (mode_is_signed(mode)) {
2644                         return new_d_Shrs(dbgi, left, right, mode);
2645                 } else {
2646                         return new_d_Shr(dbgi, left, right, mode);
2647                 }
2648         case EXPR_BINARY_DIV:
2649         case EXPR_BINARY_DIV_ASSIGN: {
2650                 ir_node *pin = new_Pin(new_NoMem());
2651                 ir_node *op;
2652                 ir_node *res;
2653                 if (mode_is_float(mode)) {
2654                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2655                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2656                 } else {
2657                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2658                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2659                 }
2660                 return res;
2661         }
2662         case EXPR_BINARY_MOD:
2663         case EXPR_BINARY_MOD_ASSIGN: {
2664                 ir_node *pin = new_Pin(new_NoMem());
2665                 assert(!mode_is_float(mode));
2666                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2667                                          op_pin_state_floats);
2668                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2669                 return res;
2670         }
2671         default:
2672                 panic("unexpected expression kind");
2673         }
2674 }
2675
2676 static ir_node *create_lazy_op(const binary_expression_t *expression)
2677 {
2678         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2679         type_t   *type = skip_typeref(expression->base.type);
2680         ir_mode  *mode = get_ir_mode_arithmetic(type);
2681
2682         if (is_constant_expression(expression->left)) {
2683                 bool val = fold_constant_to_bool(expression->left);
2684                 expression_kind_t ekind = expression->base.kind;
2685                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2686                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2687                         if (!val) {
2688                                 return new_Const(get_mode_null(mode));
2689                         }
2690                 } else {
2691                         if (val) {
2692                                 return new_Const(get_mode_one(mode));
2693                         }
2694                 }
2695
2696                 if (is_constant_expression(expression->right)) {
2697                         bool valr = fold_constant_to_bool(expression->right);
2698                         return valr ?
2699                                 new_Const(get_mode_one(mode)) :
2700                                 new_Const(get_mode_null(mode));
2701                 }
2702
2703                 return produce_condition_result(expression->right, mode, dbgi);
2704         }
2705
2706         return produce_condition_result((const expression_t*) expression, mode,
2707                                         dbgi);
2708 }
2709
2710 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2711                                             ir_node *right, ir_mode *mode);
2712
2713 static ir_node *create_assign_binop(const binary_expression_t *expression)
2714 {
2715         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2716         const expression_t *left_expr = expression->left;
2717         type_t             *type      = skip_typeref(left_expr->base.type);
2718         ir_node            *right     = expression_to_firm(expression->right);
2719         ir_node            *left_addr = expression_to_addr(left_expr);
2720         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2721         ir_node            *result    = create_op(dbgi, expression, left, right);
2722
2723         result = create_cast(dbgi, result, expression->right->base.type, type);
2724         result = do_strict_conv(dbgi, result);
2725
2726         result = set_value_for_expression_addr(left_expr, result, left_addr);
2727
2728         if (!is_type_compound(type)) {
2729                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2730                 result = create_conv(dbgi, result, mode_arithmetic);
2731         }
2732         return result;
2733 }
2734
2735 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2736 {
2737         expression_kind_t kind = expression->base.kind;
2738
2739         switch(kind) {
2740         case EXPR_BINARY_EQUAL:
2741         case EXPR_BINARY_NOTEQUAL:
2742         case EXPR_BINARY_LESS:
2743         case EXPR_BINARY_LESSEQUAL:
2744         case EXPR_BINARY_GREATER:
2745         case EXPR_BINARY_GREATEREQUAL:
2746         case EXPR_BINARY_ISGREATER:
2747         case EXPR_BINARY_ISGREATEREQUAL:
2748         case EXPR_BINARY_ISLESS:
2749         case EXPR_BINARY_ISLESSEQUAL:
2750         case EXPR_BINARY_ISLESSGREATER:
2751         case EXPR_BINARY_ISUNORDERED: {
2752                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2753                 ir_node *left  = expression_to_firm(expression->left);
2754                 ir_node *right = expression_to_firm(expression->right);
2755                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2756                 long     pnc   = get_pnc(kind, expression->left->base.type);
2757                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2758                 return proj;
2759         }
2760         case EXPR_BINARY_ASSIGN: {
2761                 ir_node *addr  = expression_to_addr(expression->left);
2762                 ir_node *right = expression_to_firm(expression->right);
2763                 ir_node *res
2764                         = set_value_for_expression_addr(expression->left, right, addr);
2765
2766                 type_t  *type            = skip_typeref(expression->base.type);
2767                 if (!is_type_compound(type)) {
2768                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2769                         res                      = create_conv(NULL, res, mode_arithmetic);
2770                 }
2771                 return res;
2772         }
2773         case EXPR_BINARY_ADD:
2774         case EXPR_BINARY_SUB:
2775         case EXPR_BINARY_MUL:
2776         case EXPR_BINARY_DIV:
2777         case EXPR_BINARY_MOD:
2778         case EXPR_BINARY_BITWISE_AND:
2779         case EXPR_BINARY_BITWISE_OR:
2780         case EXPR_BINARY_BITWISE_XOR:
2781         case EXPR_BINARY_SHIFTLEFT:
2782         case EXPR_BINARY_SHIFTRIGHT:
2783         {
2784                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2785                 ir_node  *left  = expression_to_firm(expression->left);
2786                 ir_node  *right = expression_to_firm(expression->right);
2787                 return create_op(dbgi, expression, left, right);
2788         }
2789         case EXPR_BINARY_LOGICAL_AND:
2790         case EXPR_BINARY_LOGICAL_OR:
2791                 return create_lazy_op(expression);
2792         case EXPR_BINARY_COMMA:
2793                 /* create side effects of left side */
2794                 (void) expression_to_firm(expression->left);
2795                 return _expression_to_firm(expression->right);
2796
2797         case EXPR_BINARY_ADD_ASSIGN:
2798         case EXPR_BINARY_SUB_ASSIGN:
2799         case EXPR_BINARY_MUL_ASSIGN:
2800         case EXPR_BINARY_MOD_ASSIGN:
2801         case EXPR_BINARY_DIV_ASSIGN:
2802         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2803         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2804         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2805         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2806         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2807                 return create_assign_binop(expression);
2808         default:
2809                 panic("TODO binexpr type");
2810         }
2811 }
2812
2813 static ir_node *array_access_addr(const array_access_expression_t *expression)
2814 {
2815         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2816         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2817         ir_node  *offset      = expression_to_firm(expression->index);
2818         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2819         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2820         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2821
2822         return result;
2823 }
2824
2825 static ir_node *array_access_to_firm(
2826                 const array_access_expression_t *expression)
2827 {
2828         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2829         ir_node  *addr   = array_access_addr(expression);
2830         type_t   *type   = revert_automatic_type_conversion(
2831                         (const expression_t*) expression);
2832         type             = skip_typeref(type);
2833
2834         return deref_address(dbgi, type, addr);
2835 }
2836
2837 static long get_offsetof_offset(const offsetof_expression_t *expression)
2838 {
2839         type_t *orig_type = expression->type;
2840         long    offset    = 0;
2841
2842         designator_t *designator = expression->designator;
2843         for ( ; designator != NULL; designator = designator->next) {
2844                 type_t *type = skip_typeref(orig_type);
2845                 /* be sure the type is constructed */
2846                 (void) get_ir_type(type);
2847
2848                 if (designator->symbol != NULL) {
2849                         assert(is_type_compound(type));
2850                         symbol_t *symbol = designator->symbol;
2851
2852                         compound_t *compound = type->compound.compound;
2853                         entity_t   *iter     = compound->members.entities;
2854                         for ( ; iter != NULL; iter = iter->base.next) {
2855                                 if (iter->base.symbol == symbol) {
2856                                         break;
2857                                 }
2858                         }
2859                         assert(iter != NULL);
2860
2861                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2862                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2863                         offset += get_entity_offset(iter->compound_member.entity);
2864
2865                         orig_type = iter->declaration.type;
2866                 } else {
2867                         expression_t *array_index = designator->array_index;
2868                         assert(designator->array_index != NULL);
2869                         assert(is_type_array(type));
2870
2871                         long index         = fold_constant_to_int(array_index);
2872                         ir_type *arr_type  = get_ir_type(type);
2873                         ir_type *elem_type = get_array_element_type(arr_type);
2874                         long     elem_size = get_type_size_bytes(elem_type);
2875
2876                         offset += index * elem_size;
2877
2878                         orig_type = type->array.element_type;
2879                 }
2880         }
2881
2882         return offset;
2883 }
2884
2885 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2886 {
2887         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2888         long      offset = get_offsetof_offset(expression);
2889         tarval   *tv     = new_tarval_from_long(offset, mode);
2890         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2891
2892         return new_d_Const(dbgi, tv);
2893 }
2894
2895 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2896                                      ir_entity *entity, type_t *type);
2897
2898 static ir_node *compound_literal_to_firm(
2899                 const compound_literal_expression_t *expression)
2900 {
2901         type_t *type = expression->type;
2902
2903         /* create an entity on the stack */
2904         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2905
2906         ident     *const id     = id_unique("CompLit.%u");
2907         ir_type   *const irtype = get_ir_type(type);
2908         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2909         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2910         set_entity_ld_ident(entity, id);
2911
2912         set_entity_variability(entity, variability_uninitialized);
2913
2914         /* create initialisation code */
2915         initializer_t *initializer = expression->initializer;
2916         create_local_initializer(initializer, dbgi, entity, type);
2917
2918         /* create a sel for the compound literal address */
2919         ir_node *frame = get_irg_frame(current_ir_graph);
2920         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2921         return sel;
2922 }
2923
2924 /**
2925  * Transform a sizeof expression into Firm code.
2926  */
2927 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2928 {
2929         type_t *const type = skip_typeref(expression->type);
2930         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2931         if (is_type_array(type) && type->array.is_vla
2932                         && expression->tp_expression != NULL) {
2933                 expression_to_firm(expression->tp_expression);
2934         }
2935
2936         return get_type_size_node(type);
2937 }
2938
2939 static entity_t *get_expression_entity(const expression_t *expression)
2940 {
2941         if (expression->kind != EXPR_REFERENCE)
2942                 return NULL;
2943
2944         return expression->reference.entity;
2945 }
2946
2947 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2948 {
2949         switch(entity->kind) {
2950         DECLARATION_KIND_CASES
2951                 return entity->declaration.alignment;
2952         case ENTITY_STRUCT:
2953         case ENTITY_UNION:
2954                 return entity->compound.alignment;
2955         case ENTITY_TYPEDEF:
2956                 return entity->typedefe.alignment;
2957         default:
2958                 break;
2959         }
2960         return 0;
2961 }
2962
2963 /**
2964  * Transform an alignof expression into Firm code.
2965  */
2966 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2967 {
2968         unsigned alignment = 0;
2969
2970         const expression_t *tp_expression = expression->tp_expression;
2971         if (tp_expression != NULL) {
2972                 entity_t *entity = get_expression_entity(tp_expression);
2973                 if (entity != NULL) {
2974                         alignment = get_cparser_entity_alignment(entity);
2975                 }
2976         }
2977
2978         if (alignment == 0) {
2979                 type_t *type = expression->type;
2980                 alignment = get_type_alignment(type);
2981         }
2982
2983         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2984         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
2985         tarval   *tv   = new_tarval_from_long(alignment, mode);
2986         return new_d_Const(dbgi, tv);
2987 }
2988
2989 static void init_ir_types(void);
2990
2991 static tarval *fold_constant_to_tarval(const expression_t *expression)
2992 {
2993         assert(is_type_valid(skip_typeref(expression->base.type)));
2994
2995         bool constant_folding_old = constant_folding;
2996         constant_folding = true;
2997
2998         init_ir_types();
2999
3000         assert(is_constant_expression(expression));
3001
3002         ir_graph *old_current_ir_graph = current_ir_graph;
3003         current_ir_graph = get_const_code_irg();
3004
3005         ir_node *cnst = expression_to_firm(expression);
3006         current_ir_graph = old_current_ir_graph;
3007
3008         if (!is_Const(cnst)) {
3009                 panic("couldn't fold constant");
3010         }
3011
3012         constant_folding = constant_folding_old;
3013
3014         tarval *tv = get_Const_tarval(cnst);
3015         return tv;
3016 }
3017
3018 long fold_constant_to_int(const expression_t *expression)
3019 {
3020         if (expression->kind == EXPR_INVALID)
3021                 return 0;
3022
3023         tarval *tv = fold_constant_to_tarval(expression);
3024         if (!tarval_is_long(tv)) {
3025                 panic("result of constant folding is not integer");
3026         }
3027
3028         return get_tarval_long(tv);
3029 }
3030
3031 bool fold_constant_to_bool(const expression_t *expression)
3032 {
3033         if (expression->kind == EXPR_INVALID)
3034                 return false;
3035         tarval *tv = fold_constant_to_tarval(expression);
3036         return !tarval_is_null(tv);
3037 }
3038
3039 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3040 {
3041         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3042
3043         /* first try to fold a constant condition */
3044         if (is_constant_expression(expression->condition)) {
3045                 bool val = fold_constant_to_bool(expression->condition);
3046                 if (val) {
3047                         expression_t *true_expression = expression->true_expression;
3048                         if (true_expression == NULL)
3049                                 true_expression = expression->condition;
3050                         return expression_to_firm(true_expression);
3051                 } else {
3052                         return expression_to_firm(expression->false_expression);
3053                 }
3054         }
3055
3056         ir_node *cur_block   = get_cur_block();
3057
3058         /* create the true block */
3059         ir_node *true_block  = new_immBlock();
3060         set_cur_block(true_block);
3061
3062         ir_node *true_val = expression->true_expression != NULL ?
3063                 expression_to_firm(expression->true_expression) : NULL;
3064         ir_node *true_jmp = new_Jmp();
3065
3066         /* create the false block */
3067         ir_node *false_block = new_immBlock();
3068         set_cur_block(false_block);
3069
3070         ir_node *false_val = expression_to_firm(expression->false_expression);
3071         ir_node *false_jmp = new_Jmp();
3072
3073         /* create the condition evaluation */
3074         set_cur_block(cur_block);
3075         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3076         if (expression->true_expression == NULL) {
3077                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3078                         true_val = cond_expr;
3079                 } else {
3080                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3081                          * comparison.  Generate a "1" as value for the true branch. */
3082                         true_val = new_Const(get_mode_one(mode_Is));
3083                 }
3084         }
3085         mature_immBlock(true_block);
3086         mature_immBlock(false_block);
3087
3088         /* create the common block */
3089         ir_node *in_cf[2] = { true_jmp, false_jmp };
3090         new_Block(2, in_cf);
3091
3092         /* TODO improve static semantics, so either both or no values are NULL */
3093         if (true_val == NULL || false_val == NULL)
3094                 return NULL;
3095
3096         ir_node *in[2] = { true_val, false_val };
3097         ir_mode *mode  = get_irn_mode(true_val);
3098         assert(get_irn_mode(false_val) == mode);
3099         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3100
3101         return val;
3102 }
3103
3104 /**
3105  * Returns an IR-node representing the address of a field.
3106  */
3107 static ir_node *select_addr(const select_expression_t *expression)
3108 {
3109         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3110
3111         construct_select_compound(expression);
3112
3113         ir_node *compound_addr = expression_to_firm(expression->compound);
3114
3115         entity_t *entry = expression->compound_entry;
3116         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3117         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3118
3119         if (constant_folding) {
3120                 ir_mode *mode = get_irn_mode(compound_addr);
3121                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3122                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3123                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3124         } else {
3125                 ir_entity *irentity = entry->compound_member.entity;
3126                 assert(irentity != NULL);
3127                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3128         }
3129 }
3130
3131 static ir_node *select_to_firm(const select_expression_t *expression)
3132 {
3133         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3134         ir_node  *addr = select_addr(expression);
3135         type_t   *type = revert_automatic_type_conversion(
3136                         (const expression_t*) expression);
3137         type           = skip_typeref(type);
3138
3139         entity_t *entry      = expression->compound_entry;
3140         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3141         type_t   *entry_type = skip_typeref(entry->declaration.type);
3142
3143         if (entry_type->kind == TYPE_BITFIELD) {
3144                 return bitfield_extract_to_firm(expression, addr);
3145         }
3146
3147         return deref_address(dbgi, type, addr);
3148 }
3149
3150 /* Values returned by __builtin_classify_type. */
3151 typedef enum gcc_type_class
3152 {
3153         no_type_class = -1,
3154         void_type_class,
3155         integer_type_class,
3156         char_type_class,
3157         enumeral_type_class,
3158         boolean_type_class,
3159         pointer_type_class,
3160         reference_type_class,
3161         offset_type_class,
3162         real_type_class,
3163         complex_type_class,
3164         function_type_class,
3165         method_type_class,
3166         record_type_class,
3167         union_type_class,
3168         array_type_class,
3169         string_type_class,
3170         set_type_class,
3171         file_type_class,
3172         lang_type_class
3173 } gcc_type_class;
3174
3175 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3176 {
3177         type_t *type = expr->type_expression->base.type;
3178
3179         /* FIXME gcc returns different values depending on whether compiling C or C++
3180          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3181         gcc_type_class tc;
3182         for (;;) {
3183                 type = skip_typeref(type);
3184                 switch (type->kind) {
3185                         case TYPE_ATOMIC: {
3186                                 const atomic_type_t *const atomic_type = &type->atomic;
3187                                 switch (atomic_type->akind) {
3188                                         /* should not be reached */
3189                                         case ATOMIC_TYPE_INVALID:
3190                                                 tc = no_type_class;
3191                                                 goto make_const;
3192
3193                                         /* gcc cannot do that */
3194                                         case ATOMIC_TYPE_VOID:
3195                                                 tc = void_type_class;
3196                                                 goto make_const;
3197
3198                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3199                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3200                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3201                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3202                                         case ATOMIC_TYPE_SHORT:
3203                                         case ATOMIC_TYPE_USHORT:
3204                                         case ATOMIC_TYPE_INT:
3205                                         case ATOMIC_TYPE_UINT:
3206                                         case ATOMIC_TYPE_LONG:
3207                                         case ATOMIC_TYPE_ULONG:
3208                                         case ATOMIC_TYPE_LONGLONG:
3209                                         case ATOMIC_TYPE_ULONGLONG:
3210                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3211                                                 tc = integer_type_class;
3212                                                 goto make_const;
3213
3214                                         case ATOMIC_TYPE_FLOAT:
3215                                         case ATOMIC_TYPE_DOUBLE:
3216                                         case ATOMIC_TYPE_LONG_DOUBLE:
3217                                                 tc = real_type_class;
3218                                                 goto make_const;
3219                                 }
3220                                 panic("Unexpected atomic type in classify_type_to_firm().");
3221                         }
3222
3223                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3224                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3225                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3226                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3227                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3228                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3229                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3230                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3231
3232                         /* gcc handles this as integer */
3233                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3234
3235                         /* gcc classifies the referenced type */
3236                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3237
3238                         case TYPE_BUILTIN:
3239                         /* typedef/typeof should be skipped already */
3240                         case TYPE_TYPEDEF:
3241                         case TYPE_TYPEOF:
3242                         case TYPE_INVALID:
3243                         case TYPE_ERROR:
3244                                 break;
3245                 }
3246                 panic("unexpected TYPE classify_type_to_firm().");
3247         }
3248
3249 make_const:;
3250         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3251         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3252         return new_d_Const(dbgi, tv);
3253 }
3254
3255 static ir_node *function_name_to_firm(
3256                 const funcname_expression_t *const expr)
3257 {
3258         switch(expr->kind) {
3259         case FUNCNAME_FUNCTION:
3260         case FUNCNAME_PRETTY_FUNCTION:
3261         case FUNCNAME_FUNCDNAME:
3262                 if (current_function_name == NULL) {
3263                         const source_position_t *const src_pos = &expr->base.source_position;
3264                         const char    *name  = current_function_entity->base.symbol->string;
3265                         const string_t string = { name, strlen(name) + 1 };
3266                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3267                 }
3268                 return current_function_name;
3269         case FUNCNAME_FUNCSIG:
3270                 if (current_funcsig == NULL) {
3271                         const source_position_t *const src_pos = &expr->base.source_position;
3272                         ir_entity *ent = get_irg_entity(current_ir_graph);
3273                         const char *const name = get_entity_ld_name(ent);
3274                         const string_t string = { name, strlen(name) + 1 };
3275                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3276                 }
3277                 return current_funcsig;
3278         }
3279         panic("Unsupported function name");
3280 }
3281
3282 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3283 {
3284         statement_t *statement = expr->statement;
3285
3286         assert(statement->kind == STATEMENT_COMPOUND);
3287         return compound_statement_to_firm(&statement->compound);
3288 }
3289
3290 static ir_node *va_start_expression_to_firm(
3291         const va_start_expression_t *const expr)
3292 {
3293         type_t    *const type        = current_function_entity->declaration.type;
3294         ir_type   *const method_type = get_ir_type(type);
3295         int        const n           = get_method_n_params(method_type) - 1;
3296         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3297         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3298         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3299         ir_node   *const no_mem      = new_NoMem();
3300         ir_node   *const arg_sel     =
3301                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3302
3303         type_t    *const param_type  = expr->parameter->base.type;
3304         ir_node   *const cnst        = get_type_size_node(param_type);
3305         ir_mode   *const mode        = get_irn_mode(cnst);
3306         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3307         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3308         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3309         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3310         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3311         set_value_for_expression(expr->ap, add);
3312
3313         return NULL;
3314 }
3315
3316 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3317 {
3318         type_t       *const type    = expr->base.type;
3319         expression_t *const ap_expr = expr->ap;
3320         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3321         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3322         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3323         ir_node      *const res     = deref_address(dbgi, type, ap);
3324
3325         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3326         ir_mode      *const mode    = get_irn_mode(cnst);
3327         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3328         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3329         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3330         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3331         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3332
3333         set_value_for_expression_addr(ap_expr, add, ap_addr);
3334
3335         return res;
3336 }
3337
3338 /**
3339  * Generate Firm for a va_copy expression.
3340  */
3341 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3342 {
3343         ir_node *const src = expression_to_firm(expr->src);
3344         set_value_for_expression(expr->dst, src);
3345         return NULL;
3346 }
3347
3348 static ir_node *dereference_addr(const unary_expression_t *const expression)
3349 {
3350         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3351         return expression_to_firm(expression->value);
3352 }
3353
3354 /**
3355  * Returns a IR-node representing an lvalue of the given expression.
3356  */
3357 static ir_node *expression_to_addr(const expression_t *expression)
3358 {
3359         switch(expression->kind) {
3360         case EXPR_ARRAY_ACCESS:
3361                 return array_access_addr(&expression->array_access);
3362         case EXPR_CALL:
3363                 return call_expression_to_firm(&expression->call);
3364         case EXPR_COMPOUND_LITERAL:
3365                 return compound_literal_to_firm(&expression->compound_literal);
3366         case EXPR_REFERENCE:
3367                 return reference_addr(&expression->reference);
3368         case EXPR_SELECT:
3369                 return select_addr(&expression->select);
3370         case EXPR_UNARY_DEREFERENCE:
3371                 return dereference_addr(&expression->unary);
3372         default:
3373                 break;
3374         }
3375         panic("trying to get address of non-lvalue");
3376 }
3377
3378 static ir_node *builtin_constant_to_firm(
3379                 const builtin_constant_expression_t *expression)
3380 {
3381         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3382         long     v;
3383
3384         if (is_constant_expression(expression->value)) {
3385                 v = 1;
3386         } else {
3387                 v = 0;
3388         }
3389         return new_Const_long(mode, v);
3390 }
3391
3392 static ir_node *builtin_types_compatible_to_firm(
3393                 const builtin_types_compatible_expression_t *expression)
3394 {
3395         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3396         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3397         long     const value = types_compatible(left, right) ? 1 : 0;
3398         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3399         return new_Const_long(mode, value);
3400 }
3401
3402 static ir_node *get_label_block(label_t *label)
3403 {
3404         if (label->block != NULL)
3405                 return label->block;
3406
3407         /* beware: might be called from create initializer with current_ir_graph
3408          * set to const_code_irg. */
3409         ir_graph *rem    = current_ir_graph;
3410         current_ir_graph = current_function;
3411
3412         ir_node *block = new_immBlock();
3413
3414         label->block = block;
3415
3416         ARR_APP1(label_t *, all_labels, label);
3417
3418         current_ir_graph = rem;
3419         return block;
3420 }
3421
3422 /**
3423  * Pointer to a label.  This is used for the
3424  * GNU address-of-label extension.
3425  */
3426 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3427 {
3428         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3429         ir_node   *block  = get_label_block(label->label);
3430         ir_entity *entity = create_Block_entity(block);
3431
3432         symconst_symbol value;
3433         value.entity_p = entity;
3434         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3435 }
3436
3437 /**
3438  * creates firm nodes for an expression. The difference between this function
3439  * and expression_to_firm is, that this version might produce mode_b nodes
3440  * instead of mode_Is.
3441  */
3442 static ir_node *_expression_to_firm(const expression_t *expression)
3443 {
3444 #ifndef NDEBUG
3445         if (!constant_folding) {
3446                 assert(!expression->base.transformed);
3447                 ((expression_t*) expression)->base.transformed = true;
3448         }
3449 #endif
3450
3451         switch (expression->kind) {
3452         case EXPR_CHARACTER_CONSTANT:
3453                 return character_constant_to_firm(&expression->conste);
3454         case EXPR_WIDE_CHARACTER_CONSTANT:
3455                 return wide_character_constant_to_firm(&expression->conste);
3456         case EXPR_CONST:
3457                 return const_to_firm(&expression->conste);
3458         case EXPR_STRING_LITERAL:
3459                 return string_literal_to_firm(&expression->string);
3460         case EXPR_WIDE_STRING_LITERAL:
3461                 return wide_string_literal_to_firm(&expression->wide_string);
3462         case EXPR_REFERENCE:
3463                 return reference_expression_to_firm(&expression->reference);
3464         case EXPR_REFERENCE_ENUM_VALUE:
3465                 return reference_expression_enum_value_to_firm(&expression->reference);
3466         case EXPR_CALL:
3467                 return call_expression_to_firm(&expression->call);
3468         EXPR_UNARY_CASES
3469                 return unary_expression_to_firm(&expression->unary);
3470         EXPR_BINARY_CASES
3471                 return binary_expression_to_firm(&expression->binary);
3472         case EXPR_ARRAY_ACCESS:
3473                 return array_access_to_firm(&expression->array_access);
3474         case EXPR_SIZEOF:
3475                 return sizeof_to_firm(&expression->typeprop);
3476         case EXPR_ALIGNOF:
3477                 return alignof_to_firm(&expression->typeprop);
3478         case EXPR_CONDITIONAL:
3479                 return conditional_to_firm(&expression->conditional);
3480         case EXPR_SELECT:
3481                 return select_to_firm(&expression->select);
3482         case EXPR_CLASSIFY_TYPE:
3483                 return classify_type_to_firm(&expression->classify_type);
3484         case EXPR_FUNCNAME:
3485                 return function_name_to_firm(&expression->funcname);
3486         case EXPR_STATEMENT:
3487                 return statement_expression_to_firm(&expression->statement);
3488         case EXPR_VA_START:
3489                 return va_start_expression_to_firm(&expression->va_starte);
3490         case EXPR_VA_ARG:
3491                 return va_arg_expression_to_firm(&expression->va_arge);
3492         case EXPR_VA_COPY:
3493                 return va_copy_expression_to_firm(&expression->va_copye);
3494         case EXPR_BUILTIN_CONSTANT_P:
3495                 return builtin_constant_to_firm(&expression->builtin_constant);
3496         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3497                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3498         case EXPR_OFFSETOF:
3499                 return offsetof_to_firm(&expression->offsetofe);
3500         case EXPR_COMPOUND_LITERAL:
3501                 return compound_literal_to_firm(&expression->compound_literal);
3502         case EXPR_LABEL_ADDRESS:
3503                 return label_address_to_firm(&expression->label_address);
3504
3505         case EXPR_UNKNOWN:
3506         case EXPR_INVALID:
3507                 break;
3508         }
3509         panic("invalid expression found");
3510 }
3511
3512 /**
3513  * Check if a given expression is a GNU __builtin_expect() call.
3514  */
3515 static bool is_builtin_expect(const expression_t *expression)
3516 {
3517         if (expression->kind != EXPR_CALL)
3518                 return false;
3519
3520         expression_t *function = expression->call.function;
3521         if (function->kind != EXPR_REFERENCE)
3522                 return false;
3523         reference_expression_t *ref = &function->reference;
3524         if (ref->entity->kind         != ENTITY_FUNCTION ||
3525             ref->entity->function.btk != bk_gnu_builtin_expect)
3526                 return false;
3527
3528         return true;
3529 }
3530
3531 static bool produces_mode_b(const expression_t *expression)
3532 {
3533         switch (expression->kind) {
3534         case EXPR_BINARY_EQUAL:
3535         case EXPR_BINARY_NOTEQUAL:
3536         case EXPR_BINARY_LESS:
3537         case EXPR_BINARY_LESSEQUAL:
3538         case EXPR_BINARY_GREATER:
3539         case EXPR_BINARY_GREATEREQUAL:
3540         case EXPR_BINARY_ISGREATER:
3541         case EXPR_BINARY_ISGREATEREQUAL:
3542         case EXPR_BINARY_ISLESS:
3543         case EXPR_BINARY_ISLESSEQUAL:
3544         case EXPR_BINARY_ISLESSGREATER:
3545         case EXPR_BINARY_ISUNORDERED:
3546         case EXPR_UNARY_NOT:
3547                 return true;
3548
3549         case EXPR_CALL:
3550                 if (is_builtin_expect(expression)) {
3551                         expression_t *argument = expression->call.arguments->expression;
3552                         return produces_mode_b(argument);
3553                 }
3554                 return false;
3555         case EXPR_BINARY_COMMA:
3556                 return produces_mode_b(expression->binary.right);
3557
3558         default:
3559                 return false;
3560         }
3561 }
3562
3563 static ir_node *expression_to_firm(const expression_t *expression)
3564 {
3565         if (!produces_mode_b(expression)) {
3566                 ir_node *res = _expression_to_firm(expression);
3567                 assert(res == NULL || get_irn_mode(res) != mode_b);
3568                 return res;
3569         }
3570
3571         if (is_constant_expression(expression)) {
3572                 ir_node *res  = _expression_to_firm(expression);
3573                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3574                 assert(is_Const(res));
3575                 if (is_Const_null(res)) {
3576                         return new_Const_long(mode, 0);
3577                 } else {
3578                         return new_Const_long(mode, 1);
3579                 }
3580         }
3581
3582         /* we have to produce a 0/1 from the mode_b expression */
3583         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3584         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3585         return produce_condition_result(expression, mode, dbgi);
3586 }
3587
3588 /**
3589  * create a short-circuit expression evaluation that tries to construct
3590  * efficient control flow structures for &&, || and ! expressions
3591  */
3592 static ir_node *create_condition_evaluation(const expression_t *expression,
3593                                             ir_node *true_block,
3594                                             ir_node *false_block)
3595 {
3596         switch(expression->kind) {
3597         case EXPR_UNARY_NOT: {
3598                 const unary_expression_t *unary_expression = &expression->unary;
3599                 create_condition_evaluation(unary_expression->value, false_block,
3600                                             true_block);
3601                 return NULL;
3602         }
3603         case EXPR_BINARY_LOGICAL_AND: {
3604                 const binary_expression_t *binary_expression = &expression->binary;
3605
3606                 ir_node *extra_block = new_immBlock();
3607                 create_condition_evaluation(binary_expression->left, extra_block,
3608                                             false_block);
3609                 mature_immBlock(extra_block);
3610                 set_cur_block(extra_block);
3611                 create_condition_evaluation(binary_expression->right, true_block,
3612                                             false_block);
3613                 return NULL;
3614         }
3615         case EXPR_BINARY_LOGICAL_OR: {
3616                 const binary_expression_t *binary_expression = &expression->binary;
3617
3618                 ir_node *extra_block = new_immBlock();
3619                 create_condition_evaluation(binary_expression->left, true_block,
3620                                             extra_block);
3621                 mature_immBlock(extra_block);
3622                 set_cur_block(extra_block);
3623                 create_condition_evaluation(binary_expression->right, true_block,
3624                                             false_block);
3625                 return NULL;
3626         }
3627         default:
3628                 break;
3629         }
3630
3631         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3632         ir_node  *cond_expr  = _expression_to_firm(expression);
3633         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3634         ir_node  *cond       = new_d_Cond(dbgi, condition);
3635         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3636         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3637
3638         /* set branch prediction info based on __builtin_expect */
3639         if (is_builtin_expect(expression) && is_Cond(cond)) {
3640                 call_argument_t *argument = expression->call.arguments->next;
3641                 if (is_constant_expression(argument->expression)) {
3642                         bool             cnst = fold_constant_to_bool(argument->expression);
3643                         cond_jmp_predicate pred;
3644
3645                         if (cnst == false) {
3646                                 pred = COND_JMP_PRED_FALSE;
3647                         } else {
3648                                 pred = COND_JMP_PRED_TRUE;
3649                         }
3650                         set_Cond_jmp_pred(cond, pred);
3651                 }
3652         }
3653
3654         add_immBlock_pred(true_block, true_proj);
3655         add_immBlock_pred(false_block, false_proj);
3656
3657         set_cur_block(NULL);
3658         return cond_expr;
3659 }
3660
3661 static void create_variable_entity(entity_t *variable,
3662                                    declaration_kind_t declaration_kind,
3663                                    ir_type *parent_type)
3664 {
3665         assert(variable->kind == ENTITY_VARIABLE);
3666         type_t    *type = skip_typeref(variable->declaration.type);
3667
3668         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3669         ir_type   *const irtype    = get_ir_type(type);
3670         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3671         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3672         unsigned         alignment = variable->declaration.alignment;
3673
3674         set_entity_alignment(irentity, alignment);
3675
3676         handle_decl_modifiers(irentity, variable);
3677
3678         variable->declaration.kind  = (unsigned char) declaration_kind;
3679         variable->variable.v.entity = irentity;
3680         set_entity_variability(irentity, variability_uninitialized);
3681         set_entity_ld_ident(irentity, create_ld_ident(variable));
3682
3683         if (parent_type == get_tls_type())
3684                 set_entity_allocation(irentity, allocation_automatic);
3685         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3686                 set_entity_allocation(irentity, allocation_static);
3687
3688         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3689                 set_entity_volatility(irentity, volatility_is_volatile);
3690         }
3691 }
3692
3693
3694 typedef struct type_path_entry_t type_path_entry_t;
3695 struct type_path_entry_t {
3696         type_t           *type;
3697         ir_initializer_t *initializer;
3698         size_t            index;
3699         entity_t         *compound_entry;
3700 };
3701
3702 typedef struct type_path_t type_path_t;
3703 struct type_path_t {
3704         type_path_entry_t *path;
3705         type_t            *top_type;
3706         bool               invalid;
3707 };
3708
3709 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3710 {
3711         size_t len = ARR_LEN(path->path);
3712
3713         for (size_t i = 0; i < len; ++i) {
3714                 const type_path_entry_t *entry = & path->path[i];
3715
3716                 type_t *type = skip_typeref(entry->type);
3717                 if (is_type_compound(type)) {
3718                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3719                 } else if (is_type_array(type)) {
3720                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3721                 } else {
3722                         fprintf(stderr, "-INVALID-");
3723                 }
3724         }
3725         fprintf(stderr, "  (");
3726         print_type(path->top_type);
3727         fprintf(stderr, ")");
3728 }
3729
3730 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3731 {
3732         size_t len = ARR_LEN(path->path);
3733         assert(len > 0);
3734         return & path->path[len-1];
3735 }
3736
3737 static type_path_entry_t *append_to_type_path(type_path_t *path)
3738 {
3739         size_t len = ARR_LEN(path->path);
3740         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3741
3742         type_path_entry_t *result = & path->path[len];
3743         memset(result, 0, sizeof(result[0]));
3744         return result;
3745 }
3746
3747 static size_t get_compound_member_count(const compound_type_t *type)
3748 {
3749         compound_t *compound  = type->compound;
3750         size_t      n_members = 0;
3751         entity_t   *member    = compound->members.entities;
3752         for ( ; member != NULL; member = member->base.next) {
3753                 ++n_members;
3754         }
3755
3756         return n_members;
3757 }
3758
3759 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3760 {
3761         type_t *orig_top_type = path->top_type;
3762         type_t *top_type      = skip_typeref(orig_top_type);
3763
3764         assert(is_type_compound(top_type) || is_type_array(top_type));
3765
3766         if (ARR_LEN(path->path) == 0) {
3767                 return NULL;
3768         } else {
3769                 type_path_entry_t *top         = get_type_path_top(path);
3770                 ir_initializer_t  *initializer = top->initializer;
3771                 return get_initializer_compound_value(initializer, top->index);
3772         }
3773 }
3774
3775 static void descend_into_subtype(type_path_t *path)
3776 {
3777         type_t *orig_top_type = path->top_type;
3778         type_t *top_type      = skip_typeref(orig_top_type);
3779
3780         assert(is_type_compound(top_type) || is_type_array(top_type));
3781
3782         ir_initializer_t *initializer = get_initializer_entry(path);
3783
3784         type_path_entry_t *top = append_to_type_path(path);
3785         top->type              = top_type;
3786
3787         size_t len;
3788
3789         if (is_type_compound(top_type)) {
3790                 compound_t *compound = top_type->compound.compound;
3791                 entity_t   *entry    = compound->members.entities;
3792
3793                 top->compound_entry = entry;
3794                 top->index          = 0;
3795                 len                 = get_compound_member_count(&top_type->compound);
3796                 if (entry != NULL) {
3797                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3798                         path->top_type = entry->declaration.type;
3799                 }
3800         } else {
3801                 assert(is_type_array(top_type));
3802                 assert(top_type->array.size > 0);
3803
3804                 top->index     = 0;
3805                 path->top_type = top_type->array.element_type;
3806                 len            = top_type->array.size;
3807         }
3808         if (initializer == NULL
3809                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3810                 initializer = create_initializer_compound(len);
3811                 /* we have to set the entry at the 2nd latest path entry... */
3812                 size_t path_len = ARR_LEN(path->path);
3813                 assert(path_len >= 1);
3814                 if (path_len > 1) {
3815                         type_path_entry_t *entry        = & path->path[path_len-2];
3816                         ir_initializer_t  *tinitializer = entry->initializer;
3817                         set_initializer_compound_value(tinitializer, entry->index,
3818                                                        initializer);
3819                 }
3820         }
3821         top->initializer = initializer;
3822 }
3823
3824 static void ascend_from_subtype(type_path_t *path)
3825 {
3826         type_path_entry_t *top = get_type_path_top(path);
3827
3828         path->top_type = top->type;
3829
3830         size_t len = ARR_LEN(path->path);
3831         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3832 }
3833
3834 static void walk_designator(type_path_t *path, const designator_t *designator)
3835 {
3836         /* designators start at current object type */
3837         ARR_RESIZE(type_path_entry_t, path->path, 1);
3838
3839         for ( ; designator != NULL; designator = designator->next) {
3840                 type_path_entry_t *top         = get_type_path_top(path);
3841                 type_t            *orig_type   = top->type;
3842                 type_t            *type        = skip_typeref(orig_type);
3843
3844                 if (designator->symbol != NULL) {
3845                         assert(is_type_compound(type));
3846                         size_t    index  = 0;
3847                         symbol_t *symbol = designator->symbol;
3848
3849                         compound_t *compound = type->compound.compound;
3850                         entity_t   *iter     = compound->members.entities;
3851                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3852                                 if (iter->base.symbol == symbol) {
3853                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3854                                         break;
3855                                 }
3856                         }
3857                         assert(iter != NULL);
3858
3859                         /* revert previous initialisations of other union elements */
3860                         if (type->kind == TYPE_COMPOUND_UNION) {
3861                                 ir_initializer_t *initializer = top->initializer;
3862                                 if (initializer != NULL
3863                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3864                                         /* are we writing to a new element? */
3865                                         ir_initializer_t *oldi
3866                                                 = get_initializer_compound_value(initializer, index);
3867                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3868                                                 /* clear initializer */
3869                                                 size_t len
3870                                                         = get_initializer_compound_n_entries(initializer);
3871                                                 ir_initializer_t *nulli = get_initializer_null();
3872                                                 for (size_t i = 0; i < len; ++i) {
3873                                                         set_initializer_compound_value(initializer, i,
3874                                                                                        nulli);
3875                                                 }
3876                                         }
3877                                 }
3878                         }
3879
3880                         top->type           = orig_type;
3881                         top->compound_entry = iter;
3882                         top->index          = index;
3883                         orig_type           = iter->declaration.type;
3884                 } else {
3885                         expression_t *array_index = designator->array_index;
3886                         assert(designator->array_index != NULL);
3887                         assert(is_type_array(type));
3888
3889                         long index = fold_constant_to_int(array_index);
3890                         assert(index >= 0);
3891 #ifndef NDEBUG
3892                         if (type->array.size_constant) {
3893                                 long array_size = type->array.size;
3894                                 assert(index < array_size);
3895                         }
3896 #endif
3897
3898                         top->type  = orig_type;
3899                         top->index = (size_t) index;
3900                         orig_type  = type->array.element_type;
3901                 }
3902                 path->top_type = orig_type;
3903
3904                 if (designator->next != NULL) {
3905                         descend_into_subtype(path);
3906                 }
3907         }
3908
3909         path->invalid  = false;
3910 }
3911
3912 static void advance_current_object(type_path_t *path)
3913 {
3914         if (path->invalid) {
3915                 /* TODO: handle this... */
3916                 panic("invalid initializer in ast2firm (excessive elements)");
3917         }
3918
3919         type_path_entry_t *top = get_type_path_top(path);
3920
3921         type_t *type = skip_typeref(top->type);
3922         if (is_type_union(type)) {
3923                 /* only the first element is initialized in unions */
3924                 top->compound_entry = NULL;
3925         } else if (is_type_struct(type)) {
3926                 entity_t *entry = top->compound_entry;
3927
3928                 top->index++;
3929                 entry               = entry->base.next;
3930                 top->compound_entry = entry;
3931                 if (entry != NULL) {
3932                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3933                         path->top_type = entry->declaration.type;
3934                         return;
3935                 }
3936         } else {
3937                 assert(is_type_array(type));
3938
3939                 top->index++;
3940                 if (!type->array.size_constant || top->index < type->array.size) {
3941                         return;
3942                 }
3943         }
3944
3945         /* we're past the last member of the current sub-aggregate, try if we
3946          * can ascend in the type hierarchy and continue with another subobject */
3947         size_t len = ARR_LEN(path->path);
3948
3949         if (len > 1) {
3950                 ascend_from_subtype(path);
3951                 advance_current_object(path);
3952         } else {
3953                 path->invalid = true;
3954         }
3955 }
3956
3957
3958 static ir_initializer_t *create_ir_initializer(
3959                 const initializer_t *initializer, type_t *type);
3960
3961 static ir_initializer_t *create_ir_initializer_value(
3962                 const initializer_value_t *initializer)
3963 {
3964         if (is_type_compound(initializer->value->base.type)) {
3965                 panic("initializer creation for compounds not implemented yet");
3966         }
3967         type_t       *type = initializer->value->base.type;
3968         expression_t *expr = initializer->value;
3969         if (initializer_use_bitfield_basetype) {
3970                 type_t *skipped = skip_typeref(type);
3971                 if (skipped->kind == TYPE_BITFIELD) {
3972                         /* remove the bitfield cast... */
3973                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
3974                         expr = expr->unary.value;
3975                         type = skipped->bitfield.base_type;
3976                 }
3977         }
3978         ir_node *value = expression_to_firm(expr);
3979         ir_mode *mode  = get_ir_mode_storage(type);
3980         value          = create_conv(NULL, value, mode);
3981         return create_initializer_const(value);
3982 }
3983
3984 /** test wether type can be initialized by a string constant */
3985 static bool is_string_type(type_t *type)
3986 {
3987         type_t *inner;
3988         if (is_type_pointer(type)) {
3989                 inner = skip_typeref(type->pointer.points_to);
3990         } else if(is_type_array(type)) {
3991                 inner = skip_typeref(type->array.element_type);
3992         } else {
3993                 return false;
3994         }
3995
3996         return is_type_integer(inner);
3997 }
3998
3999 static ir_initializer_t *create_ir_initializer_list(
4000                 const initializer_list_t *initializer, type_t *type)
4001 {
4002         type_path_t path;
4003         memset(&path, 0, sizeof(path));
4004         path.top_type = type;
4005         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4006
4007         descend_into_subtype(&path);
4008
4009         for (size_t i = 0; i < initializer->len; ++i) {
4010                 const initializer_t *sub_initializer = initializer->initializers[i];
4011
4012                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4013                         walk_designator(&path, sub_initializer->designator.designator);
4014                         continue;
4015                 }
4016
4017                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4018                         /* we might have to descend into types until we're at a scalar
4019                          * type */
4020                         while(true) {
4021                                 type_t *orig_top_type = path.top_type;
4022                                 type_t *top_type      = skip_typeref(orig_top_type);
4023
4024                                 if (is_type_scalar(top_type))
4025                                         break;
4026                                 descend_into_subtype(&path);
4027                         }
4028                 } else if (sub_initializer->kind == INITIALIZER_STRING
4029                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4030                         /* we might have to descend into types until we're at a scalar
4031                          * type */
4032                         while (true) {
4033                                 type_t *orig_top_type = path.top_type;
4034                                 type_t *top_type      = skip_typeref(orig_top_type);
4035
4036                                 if (is_string_type(top_type))
4037                                         break;
4038                                 descend_into_subtype(&path);
4039                         }
4040                 }
4041
4042                 ir_initializer_t *sub_irinitializer
4043                         = create_ir_initializer(sub_initializer, path.top_type);
4044
4045                 size_t path_len = ARR_LEN(path.path);
4046                 assert(path_len >= 1);
4047                 type_path_entry_t *entry        = & path.path[path_len-1];
4048                 ir_initializer_t  *tinitializer = entry->initializer;
4049                 set_initializer_compound_value(tinitializer, entry->index,
4050                                                sub_irinitializer);
4051
4052                 advance_current_object(&path);
4053         }
4054
4055         assert(ARR_LEN(path.path) >= 1);
4056         ir_initializer_t *result = path.path[0].initializer;
4057         DEL_ARR_F(path.path);
4058
4059         return result;
4060 }
4061
4062 static ir_initializer_t *create_ir_initializer_string(
4063                 const initializer_string_t *initializer, type_t *type)
4064 {
4065         type = skip_typeref(type);
4066
4067         size_t            string_len    = initializer->string.size;
4068         assert(type->kind == TYPE_ARRAY);
4069         assert(type->array.size_constant);
4070         size_t            len           = type->array.size;
4071         ir_initializer_t *irinitializer = create_initializer_compound(len);
4072
4073         const char *string = initializer->string.begin;
4074         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4075
4076         for (size_t i = 0; i < len; ++i) {
4077                 char c = 0;
4078                 if (i < string_len)
4079                         c = string[i];
4080
4081                 tarval           *tv = new_tarval_from_long(c, mode);
4082                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4083
4084                 set_initializer_compound_value(irinitializer, i, char_initializer);
4085         }
4086
4087         return irinitializer;
4088 }
4089
4090 static ir_initializer_t *create_ir_initializer_wide_string(
4091                 const initializer_wide_string_t *initializer, type_t *type)
4092 {
4093         size_t            string_len    = initializer->string.size;
4094         assert(type->kind == TYPE_ARRAY);
4095         assert(type->array.size_constant);
4096         size_t            len           = type->array.size;
4097         ir_initializer_t *irinitializer = create_initializer_compound(len);
4098
4099         const wchar_rep_t *string = initializer->string.begin;
4100         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
4101
4102         for (size_t i = 0; i < len; ++i) {
4103                 wchar_rep_t c = 0;
4104                 if (i < string_len) {
4105                         c = string[i];
4106                 }
4107                 tarval *tv = new_tarval_from_long(c, mode);
4108                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4109
4110                 set_initializer_compound_value(irinitializer, i, char_initializer);
4111         }
4112
4113         return irinitializer;
4114 }
4115
4116 static ir_initializer_t *create_ir_initializer(
4117                 const initializer_t *initializer, type_t *type)
4118 {
4119         switch(initializer->kind) {
4120                 case INITIALIZER_STRING:
4121                         return create_ir_initializer_string(&initializer->string, type);
4122
4123                 case INITIALIZER_WIDE_STRING:
4124                         return create_ir_initializer_wide_string(&initializer->wide_string,
4125                                                                  type);
4126
4127                 case INITIALIZER_LIST:
4128                         return create_ir_initializer_list(&initializer->list, type);
4129
4130                 case INITIALIZER_VALUE:
4131                         return create_ir_initializer_value(&initializer->value);
4132
4133                 case INITIALIZER_DESIGNATOR:
4134                         panic("unexpected designator initializer found");
4135         }
4136         panic("unknown initializer");
4137 }
4138
4139 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4140                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4141 {
4142         switch(get_initializer_kind(initializer)) {
4143         case IR_INITIALIZER_NULL: {
4144                 /* NULL is undefined for dynamic initializers */
4145                 return;
4146         }
4147         case IR_INITIALIZER_CONST: {
4148                 ir_node *node     = get_initializer_const_value(initializer);
4149                 ir_mode *mode     = get_irn_mode(node);
4150                 ir_type *ent_type = get_entity_type(entity);
4151
4152                 /* is it a bitfield type? */
4153                 if (is_Primitive_type(ent_type) &&
4154                                 get_primitive_base_type(ent_type) != NULL) {
4155                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4156                         return;
4157                 }
4158
4159                 assert(get_type_mode(type) == mode);
4160                 ir_node *mem    = get_store();
4161                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4162                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4163                 set_store(proj_m);
4164                 return;
4165         }
4166         case IR_INITIALIZER_TARVAL: {
4167                 tarval  *tv       = get_initializer_tarval_value(initializer);
4168                 ir_mode *mode     = get_tarval_mode(tv);
4169                 ir_node *cnst     = new_d_Const(dbgi, tv);
4170                 ir_type *ent_type = get_entity_type(entity);
4171
4172                 /* is it a bitfield type? */
4173                 if (is_Primitive_type(ent_type) &&
4174                                 get_primitive_base_type(ent_type) != NULL) {
4175                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4176                         return;
4177                 }
4178
4179                 assert(get_type_mode(type) == mode);
4180                 ir_node *mem    = get_store();
4181                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4182                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4183                 set_store(proj_m);
4184                 return;
4185         }
4186         case IR_INITIALIZER_COMPOUND: {
4187                 assert(is_compound_type(type));
4188                 int n_members;
4189                 if (is_Array_type(type)) {
4190                         assert(has_array_upper_bound(type, 0));
4191                         n_members = get_array_upper_bound_int(type, 0);
4192                 } else {
4193                         n_members = get_compound_n_members(type);
4194                 }
4195
4196                 if (get_initializer_compound_n_entries(initializer)
4197                                 != (unsigned) n_members)
4198                         panic("initializer doesn't match compound type");
4199
4200                 for (int i = 0; i < n_members; ++i) {
4201                         ir_node   *addr;
4202                         ir_type   *irtype;
4203                         ir_entity *sub_entity;
4204                         if (is_Array_type(type)) {
4205                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4206                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4207                                 ir_node   *in[1]    = { cnst };
4208                                 irtype     = get_array_element_type(type);
4209                                 sub_entity = get_array_element_entity(type);
4210                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4211                                                        sub_entity);
4212                         } else {
4213                                 sub_entity = get_compound_member(type, i);
4214                                 irtype     = get_entity_type(sub_entity);
4215                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4216                                                              sub_entity);
4217                         }
4218
4219                         ir_initializer_t *sub_init
4220                                 = get_initializer_compound_value(initializer, i);
4221
4222                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4223                                                        addr);
4224                 }
4225                 return;
4226         }
4227         }
4228
4229         panic("invalid IR_INITIALIZER found");
4230 }
4231
4232 static void create_dynamic_initializer(ir_initializer_t *initializer,
4233                 dbg_info *dbgi, ir_entity *entity)
4234 {
4235         ir_node *frame     = get_irg_frame(current_ir_graph);
4236         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4237         ir_type *type      = get_entity_type(entity);
4238
4239         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4240 }
4241
4242 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4243                                      ir_entity *entity, type_t *type)
4244 {
4245         ir_node *memory = get_store();
4246         ir_node *nomem  = new_NoMem();
4247         ir_node *frame  = get_irg_frame(current_ir_graph);
4248         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4249
4250         if (initializer->kind == INITIALIZER_VALUE) {
4251                 initializer_value_t *initializer_value = &initializer->value;
4252
4253                 ir_node *value = expression_to_firm(initializer_value->value);
4254                 type = skip_typeref(type);
4255                 assign_value(dbgi, addr, type, value);
4256                 return;
4257         }
4258
4259         if (!is_constant_initializer(initializer)) {
4260                 bool old_initializer_use_bitfield_basetype
4261                         = initializer_use_bitfield_basetype;
4262                 initializer_use_bitfield_basetype = true;
4263                 ir_initializer_t *irinitializer
4264                         = create_ir_initializer(initializer, type);
4265                 initializer_use_bitfield_basetype
4266                         = old_initializer_use_bitfield_basetype;
4267
4268                 create_dynamic_initializer(irinitializer, dbgi, entity);
4269                 return;
4270         }
4271
4272         /* create the ir_initializer */
4273         ir_graph *const old_current_ir_graph = current_ir_graph;
4274         current_ir_graph = get_const_code_irg();
4275
4276         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4277
4278         assert(current_ir_graph == get_const_code_irg());
4279         current_ir_graph = old_current_ir_graph;
4280
4281         /* create a "template" entity which is copied to the entity on the stack */
4282         ident     *const id          = id_unique("initializer.%u");
4283         ir_type   *const irtype      = get_ir_type(type);
4284         ir_type   *const global_type = get_glob_type();
4285         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4286         set_entity_ld_ident(init_entity, id);
4287
4288         set_entity_variability(init_entity, variability_initialized);
4289         set_entity_visibility(init_entity, visibility_local);
4290         set_entity_allocation(init_entity, allocation_static);
4291
4292         set_entity_initializer(init_entity, irinitializer);
4293
4294         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4295         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4296
4297         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4298         set_store(copyb_mem);
4299 }
4300
4301 static void create_initializer_local_variable_entity(entity_t *entity)
4302 {
4303         assert(entity->kind == ENTITY_VARIABLE);
4304         initializer_t *initializer = entity->variable.initializer;
4305         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4306         ir_entity     *irentity    = entity->variable.v.entity;
4307         type_t        *type        = entity->declaration.type;
4308
4309         create_local_initializer(initializer, dbgi, irentity, type);
4310 }
4311
4312 static void create_variable_initializer(entity_t *entity)
4313 {
4314         assert(entity->kind == ENTITY_VARIABLE);
4315         initializer_t *initializer = entity->variable.initializer;
4316         if (initializer == NULL)
4317                 return;
4318
4319         declaration_kind_t declaration_kind
4320                 = (declaration_kind_t) entity->declaration.kind;
4321         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4322                 create_initializer_local_variable_entity(entity);
4323                 return;
4324         }
4325
4326         type_t            *type = entity->declaration.type;
4327         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4328
4329         if (initializer->kind == INITIALIZER_VALUE) {
4330                 initializer_value_t *initializer_value = &initializer->value;
4331                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4332
4333                 ir_node *value = expression_to_firm(initializer_value->value);
4334
4335                 type_t  *type = initializer_value->value->base.type;
4336                 ir_mode *mode = get_ir_mode_storage(type);
4337                 value = create_conv(dbgi, value, mode);
4338                 value = do_strict_conv(dbgi, value);
4339
4340                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4341                         set_value(entity->variable.v.value_number, value);
4342                 } else {
4343                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4344
4345                         ir_entity *irentity = entity->variable.v.entity;
4346
4347                         if (tq & TYPE_QUALIFIER_CONST) {
4348                                 set_entity_variability(irentity, variability_constant);
4349                         } else {
4350                                 set_entity_variability(irentity, variability_initialized);
4351                         }
4352                         set_atomic_ent_value(irentity, value);
4353                 }
4354         } else {
4355                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4356                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4357
4358                 ir_entity        *irentity        = entity->variable.v.entity;
4359                 ir_initializer_t *irinitializer
4360                         = create_ir_initializer(initializer, type);
4361
4362                 if (tq & TYPE_QUALIFIER_CONST) {
4363                         set_entity_variability(irentity, variability_constant);
4364                 } else {
4365                         set_entity_variability(irentity, variability_initialized);
4366                 }
4367                 set_entity_initializer(irentity, irinitializer);
4368         }
4369 }
4370
4371 static void create_variable_length_array(entity_t *entity)
4372 {
4373         assert(entity->kind == ENTITY_VARIABLE);
4374         assert(entity->variable.initializer == NULL);
4375
4376         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4377         entity->variable.v.vla_base = NULL;
4378
4379         /* TODO: record VLA somewhere so we create the free node when we leave
4380          * it's scope */
4381 }
4382
4383 static void allocate_variable_length_array(entity_t *entity)
4384 {
4385         assert(entity->kind == ENTITY_VARIABLE);
4386         assert(entity->variable.initializer == NULL);
4387         assert(get_cur_block() != NULL);
4388
4389         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4390         type_t   *type      = entity->declaration.type;
4391         ir_type  *el_type   = get_ir_type(type->array.element_type);
4392
4393         /* make sure size_node is calculated */
4394         get_type_size_node(type);
4395         ir_node  *elems = type->array.size_node;
4396         ir_node  *mem   = get_store();
4397         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4398
4399         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4400         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4401         set_store(proj_m);
4402
4403         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4404         entity->variable.v.vla_base = addr;
4405 }
4406
4407 /**
4408  * Creates a Firm local variable from a declaration.
4409  */
4410 static void create_local_variable(entity_t *entity)
4411 {
4412         assert(entity->kind == ENTITY_VARIABLE);
4413         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4414
4415         bool needs_entity = entity->variable.address_taken;
4416         type_t *type = skip_typeref(entity->declaration.type);
4417
4418         /* is it a variable length array? */
4419         if (is_type_array(type) && !type->array.size_constant) {
4420                 create_variable_length_array(entity);
4421                 return;
4422         } else if (is_type_array(type) || is_type_compound(type)) {
4423                 needs_entity = true;
4424         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4425                 needs_entity = true;
4426         }
4427
4428         if (needs_entity) {
4429                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4430                 create_variable_entity(entity,
4431                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4432                                        frame_type);
4433         } else {
4434                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4435                 entity->variable.v.value_number = next_value_number_function;
4436                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4437                                         entity);
4438                 ++next_value_number_function;
4439         }
4440 }
4441
4442 static void create_local_static_variable(entity_t *entity)
4443 {
4444         assert(entity->kind == ENTITY_VARIABLE);
4445         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4446
4447         type_t   *type           = skip_typeref(entity->declaration.type);
4448         ir_type  *const var_type = entity->variable.thread_local ?
4449                 get_tls_type() : get_glob_type();
4450         ir_type  *const irtype   = get_ir_type(type);
4451         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4452
4453         size_t l = strlen(entity->base.symbol->string);
4454         char   buf[l + sizeof(".%u")];
4455         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4456         ident     *const id = id_unique(buf);
4457
4458         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4459
4460         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4461                 set_entity_volatility(irentity, volatility_is_volatile);
4462         }
4463
4464         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4465         entity->variable.v.entity = irentity;
4466
4467         set_entity_ld_ident(irentity, id);
4468         set_entity_variability(irentity, variability_uninitialized);
4469         set_entity_visibility(irentity, visibility_local);
4470         set_entity_allocation(irentity, entity->variable.thread_local ?
4471                 allocation_automatic : allocation_static);
4472
4473         ir_graph *const old_current_ir_graph = current_ir_graph;
4474         current_ir_graph = get_const_code_irg();
4475
4476         create_variable_initializer(entity);
4477
4478         assert(current_ir_graph == get_const_code_irg());
4479         current_ir_graph = old_current_ir_graph;
4480 }
4481
4482
4483
4484 static void return_statement_to_firm(return_statement_t *statement)
4485 {
4486         if (get_cur_block() == NULL)
4487                 return;
4488
4489         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4490         type_t   *type        = current_function_entity->declaration.type;
4491         ir_type  *func_irtype = get_ir_type(type);
4492
4493
4494         ir_node *in[1];
4495         int      in_len;
4496         if (get_method_n_ress(func_irtype) > 0) {
4497                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4498
4499                 if (statement->value != NULL) {
4500                         ir_node *node = expression_to_firm(statement->value);
4501                         if (!is_compound_type(res_type)) {
4502                                 type_t  *type = statement->value->base.type;
4503                                 ir_mode *mode = get_ir_mode_storage(type);
4504                                 node          = create_conv(dbgi, node, mode);
4505                                 node          = do_strict_conv(dbgi, node);
4506                         }
4507                         in[0] = node;
4508                 } else {
4509                         ir_mode *mode;
4510                         if (is_compound_type(res_type)) {
4511                                 mode = mode_P_data;
4512                         } else {
4513                                 mode = get_type_mode(res_type);
4514                         }
4515                         in[0] = new_Unknown(mode);
4516                 }
4517                 in_len = 1;
4518         } else {
4519                 /* build return_value for its side effects */
4520                 if (statement->value != NULL) {
4521                         expression_to_firm(statement->value);
4522                 }
4523                 in_len = 0;
4524         }
4525
4526         ir_node  *store = get_store();
4527         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4528
4529         ir_node *end_block = get_irg_end_block(current_ir_graph);
4530         add_immBlock_pred(end_block, ret);
4531
4532         set_cur_block(NULL);
4533 }
4534
4535 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4536 {
4537         if (get_cur_block() == NULL)
4538                 return NULL;
4539
4540         return expression_to_firm(statement->expression);
4541 }
4542
4543 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4544 {
4545         entity_t *entity = compound->scope.entities;
4546         for ( ; entity != NULL; entity = entity->base.next) {
4547                 if (!is_declaration(entity))
4548                         continue;
4549
4550                 create_local_declaration(entity);
4551         }
4552
4553         ir_node     *result    = NULL;
4554         statement_t *statement = compound->statements;
4555         for ( ; statement != NULL; statement = statement->base.next) {
4556                 if (statement->base.next == NULL
4557                                 && statement->kind == STATEMENT_EXPRESSION) {
4558                         result = expression_statement_to_firm(
4559                                         &statement->expression);
4560                         break;
4561                 }
4562                 statement_to_firm(statement);
4563         }
4564
4565         return result;
4566 }
4567
4568 static void create_global_variable(entity_t *entity)
4569 {
4570         assert(entity->kind == ENTITY_VARIABLE);
4571
4572         ir_visibility vis;
4573         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4574                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4575                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4576                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4577
4578                 default: panic("Invalid storage class for global variable");
4579         }
4580
4581         ir_type *var_type = entity->variable.thread_local ?
4582                 get_tls_type() : get_glob_type();
4583         create_variable_entity(entity,
4584                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4585         set_entity_visibility(entity->variable.v.entity, vis);
4586 }
4587
4588 static void create_local_declaration(entity_t *entity)
4589 {
4590         assert(is_declaration(entity));
4591
4592         /* construct type */
4593         (void) get_ir_type(entity->declaration.type);
4594         if (entity->base.symbol == NULL) {
4595                 return;
4596         }
4597
4598         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4599         case STORAGE_CLASS_STATIC:
4600                 if (entity->kind == ENTITY_FUNCTION) {
4601                         (void)get_function_entity(entity, NULL);
4602                 } else {
4603                         create_local_static_variable(entity);
4604                 }
4605                 return;
4606         case STORAGE_CLASS_EXTERN:
4607                 if (entity->kind == ENTITY_FUNCTION) {
4608                         assert(entity->function.statement == NULL);
4609                         (void)get_function_entity(entity, NULL);
4610                 } else {
4611                         create_global_variable(entity);
4612                         create_variable_initializer(entity);
4613                 }
4614                 return;
4615         case STORAGE_CLASS_NONE:
4616         case STORAGE_CLASS_AUTO:
4617         case STORAGE_CLASS_REGISTER:
4618                 if (entity->kind == ENTITY_FUNCTION) {
4619                         if (entity->function.statement != NULL) {
4620                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4621                                 (void)get_function_entity(entity, owner);
4622                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4623                                 enqueue_inner_function(entity);
4624                         } else {
4625                                 (void)get_function_entity(entity, NULL);
4626                         }
4627                 } else {
4628                         create_local_variable(entity);
4629                 }
4630                 return;
4631         case STORAGE_CLASS_TYPEDEF:
4632                 break;
4633         }
4634         panic("invalid storage class found");
4635 }
4636
4637 static void initialize_local_declaration(entity_t *entity)
4638 {
4639         if (entity->base.symbol == NULL)
4640                 return;
4641
4642         // no need to emit code in dead blocks
4643         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4644                         && get_cur_block() == NULL)
4645                 return;
4646
4647         switch ((declaration_kind_t) entity->declaration.kind) {
4648         case DECLARATION_KIND_LOCAL_VARIABLE:
4649         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4650                 create_variable_initializer(entity);
4651                 return;
4652
4653         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4654                 allocate_variable_length_array(entity);
4655                 return;
4656
4657         case DECLARATION_KIND_COMPOUND_MEMBER:
4658         case DECLARATION_KIND_GLOBAL_VARIABLE:
4659         case DECLARATION_KIND_FUNCTION:
4660         case DECLARATION_KIND_INNER_FUNCTION:
4661                 return;
4662
4663         case DECLARATION_KIND_PARAMETER:
4664         case DECLARATION_KIND_PARAMETER_ENTITY:
4665                 panic("can't initialize parameters");
4666
4667         case DECLARATION_KIND_UNKNOWN:
4668                 panic("can't initialize unknown declaration");
4669         }
4670         panic("invalid declaration kind");
4671 }
4672
4673 static void declaration_statement_to_firm(declaration_statement_t *statement)
4674 {
4675         entity_t *entity = statement->declarations_begin;
4676         if (entity == NULL)
4677                 return;
4678
4679         entity_t *const last = statement->declarations_end;
4680         for ( ;; entity = entity->base.next) {
4681                 if (is_declaration(entity)) {
4682                         initialize_local_declaration(entity);
4683                 } else if (entity->kind == ENTITY_TYPEDEF) {
4684                         /* §6.7.7:3  Any array size expressions associated with variable length
4685                          * array declarators are evaluated each time the declaration of the
4686                          * typedef name is reached in the order of execution. */
4687                         type_t *const type = skip_typeref(entity->typedefe.type);
4688                         if (is_type_array(type) && type->array.is_vla)
4689                                 get_vla_size(&type->array);
4690                 }
4691                 if (entity == last)
4692                         break;
4693         }
4694 }
4695
4696 static void if_statement_to_firm(if_statement_t *statement)
4697 {
4698         ir_node *cur_block = get_cur_block();
4699
4700         ir_node *fallthrough_block = NULL;
4701
4702         /* the true (blocks) */
4703         ir_node *true_block = NULL;
4704         if (statement->true_statement != NULL) {
4705                 true_block = new_immBlock();
4706                 set_cur_block(true_block);
4707                 statement_to_firm(statement->true_statement);
4708                 if (get_cur_block() != NULL) {
4709                         ir_node *jmp = new_Jmp();
4710                         if (fallthrough_block == NULL)
4711                                 fallthrough_block = new_immBlock();
4712                         add_immBlock_pred(fallthrough_block, jmp);
4713                 }
4714         }
4715
4716         /* the false (blocks) */
4717         ir_node *false_block = NULL;
4718         if (statement->false_statement != NULL) {
4719                 false_block = new_immBlock();
4720                 set_cur_block(false_block);
4721
4722                 statement_to_firm(statement->false_statement);
4723                 if (get_cur_block() != NULL) {
4724                         ir_node *jmp = new_Jmp();
4725                         if (fallthrough_block == NULL)
4726                                 fallthrough_block = new_immBlock();
4727                         add_immBlock_pred(fallthrough_block, jmp);
4728                 }
4729         }
4730
4731         /* create the condition */
4732         if (cur_block != NULL) {
4733                 if (true_block == NULL || false_block == NULL) {
4734                         if (fallthrough_block == NULL)
4735                                 fallthrough_block = new_immBlock();
4736                         if (true_block == NULL)
4737                                 true_block = fallthrough_block;
4738                         if (false_block == NULL)
4739                                 false_block = fallthrough_block;
4740                 }
4741
4742                 set_cur_block(cur_block);
4743                 create_condition_evaluation(statement->condition, true_block,
4744                                             false_block);
4745         }
4746
4747         mature_immBlock(true_block);
4748         if (false_block != fallthrough_block && false_block != NULL) {
4749                 mature_immBlock(false_block);
4750         }
4751         if (fallthrough_block != NULL) {
4752                 mature_immBlock(fallthrough_block);
4753         }
4754
4755         set_cur_block(fallthrough_block);
4756 }
4757
4758 static void while_statement_to_firm(while_statement_t *statement)
4759 {
4760         ir_node *jmp = NULL;
4761         if (get_cur_block() != NULL) {
4762                 jmp = new_Jmp();
4763         }
4764
4765         /* create the header block */
4766         ir_node *header_block = new_immBlock();
4767         if (jmp != NULL) {
4768                 add_immBlock_pred(header_block, jmp);
4769         }
4770
4771         /* the loop body */
4772         ir_node *old_continue_label = continue_label;
4773         ir_node *old_break_label    = break_label;
4774         continue_label              = header_block;
4775         break_label                 = NULL;
4776
4777         ir_node *body_block = new_immBlock();
4778         set_cur_block(body_block);
4779         statement_to_firm(statement->body);
4780         ir_node *false_block = break_label;
4781
4782         assert(continue_label == header_block);
4783         continue_label = old_continue_label;
4784         break_label    = old_break_label;
4785
4786         if (get_cur_block() != NULL) {
4787                 jmp = new_Jmp();
4788                 add_immBlock_pred(header_block, jmp);
4789         }
4790
4791         /* shortcut for while(true) */
4792         if (is_constant_expression(statement->condition)
4793                         && fold_constant_to_bool(statement->condition) != 0) {
4794                 set_cur_block(header_block);
4795                 ir_node *header_jmp = new_Jmp();
4796                 add_immBlock_pred(body_block, header_jmp);
4797
4798                 keep_alive(body_block);
4799                 keep_all_memory(body_block);
4800                 set_cur_block(body_block);
4801         } else {
4802                 if (false_block == NULL) {
4803                         false_block = new_immBlock();
4804                 }
4805
4806                 /* create the condition */
4807                 set_cur_block(header_block);
4808
4809                 create_condition_evaluation(statement->condition, body_block,
4810                                             false_block);
4811         }
4812
4813         mature_immBlock(body_block);
4814         mature_immBlock(header_block);
4815         if (false_block != NULL) {
4816                 mature_immBlock(false_block);
4817         }
4818
4819         set_cur_block(false_block);
4820 }
4821
4822 static void do_while_statement_to_firm(do_while_statement_t *statement)
4823 {
4824         ir_node *jmp = NULL;
4825         if (get_cur_block() != NULL) {
4826                 jmp = new_Jmp();
4827         }
4828
4829         /* create the header block */
4830         ir_node *header_block = new_immBlock();
4831
4832         /* the loop body */
4833         ir_node *body_block = new_immBlock();
4834         if (jmp != NULL) {
4835                 add_immBlock_pred(body_block, jmp);
4836         }
4837
4838         ir_node *old_continue_label = continue_label;
4839         ir_node *old_break_label    = break_label;
4840         continue_label              = header_block;
4841         break_label                 = NULL;
4842
4843         set_cur_block(body_block);
4844         statement_to_firm(statement->body);
4845         ir_node *false_block = break_label;
4846
4847         assert(continue_label == header_block);
4848         continue_label = old_continue_label;
4849         break_label    = old_break_label;
4850
4851         if (get_cur_block() != NULL) {
4852                 ir_node *body_jmp = new_Jmp();
4853                 add_immBlock_pred(header_block, body_jmp);
4854                 mature_immBlock(header_block);
4855         }
4856
4857         if (false_block == NULL) {
4858                 false_block = new_immBlock();
4859         }
4860
4861         /* create the condition */
4862         set_cur_block(header_block);
4863
4864         create_condition_evaluation(statement->condition, body_block, false_block);
4865         mature_immBlock(body_block);
4866         mature_immBlock(header_block);
4867         mature_immBlock(false_block);
4868
4869         set_cur_block(false_block);
4870 }
4871
4872 static void for_statement_to_firm(for_statement_t *statement)
4873 {
4874         ir_node *jmp = NULL;
4875
4876         /* create declarations */
4877         entity_t *entity = statement->scope.entities;
4878         for ( ; entity != NULL; entity = entity->base.next) {
4879                 if (!is_declaration(entity))
4880                         continue;
4881
4882                 create_local_declaration(entity);
4883         }
4884
4885         if (get_cur_block() != NULL) {
4886                 entity = statement->scope.entities;
4887                 for ( ; entity != NULL; entity = entity->base.next) {
4888                         if (!is_declaration(entity))
4889                                 continue;
4890
4891                         initialize_local_declaration(entity);
4892                 }
4893
4894                 if (statement->initialisation != NULL) {
4895                         expression_to_firm(statement->initialisation);
4896                 }
4897
4898                 jmp = new_Jmp();
4899         }
4900
4901
4902         /* create the step block */
4903         ir_node *const step_block = new_immBlock();
4904         set_cur_block(step_block);
4905         if (statement->step != NULL) {
4906                 expression_to_firm(statement->step);
4907         }
4908         ir_node *const step_jmp = new_Jmp();
4909
4910         /* create the header block */
4911         ir_node *const header_block = new_immBlock();
4912         set_cur_block(header_block);
4913         if (jmp != NULL) {
4914                 add_immBlock_pred(header_block, jmp);
4915         }
4916         add_immBlock_pred(header_block, step_jmp);
4917
4918         /* the false block */
4919         ir_node *const false_block = new_immBlock();
4920
4921         /* the loop body */
4922         ir_node *body_block;
4923         if (statement->body != NULL) {
4924                 ir_node *const old_continue_label = continue_label;
4925                 ir_node *const old_break_label    = break_label;
4926                 continue_label = step_block;
4927                 break_label    = false_block;
4928
4929                 body_block = new_immBlock();
4930                 set_cur_block(body_block);
4931                 statement_to_firm(statement->body);
4932
4933                 assert(continue_label == step_block);
4934                 assert(break_label    == false_block);
4935                 continue_label = old_continue_label;
4936                 break_label    = old_break_label;
4937
4938                 if (get_cur_block() != NULL) {
4939                         jmp = new_Jmp();
4940                         add_immBlock_pred(step_block, jmp);
4941                 }
4942         } else {
4943                 body_block = step_block;
4944         }
4945
4946         /* create the condition */
4947         set_cur_block(header_block);
4948         if (statement->condition != NULL) {
4949                 create_condition_evaluation(statement->condition, body_block,
4950                                             false_block);
4951         } else {
4952                 keep_alive(header_block);
4953                 keep_all_memory(header_block);
4954                 jmp = new_Jmp();
4955                 add_immBlock_pred(body_block, jmp);
4956         }
4957
4958         mature_immBlock(body_block);
4959         mature_immBlock(false_block);
4960         mature_immBlock(step_block);
4961         mature_immBlock(header_block);
4962         mature_immBlock(false_block);
4963
4964         set_cur_block(false_block);
4965 }
4966
4967 static void create_jump_statement(const statement_t *statement,
4968                                   ir_node *target_block)
4969 {
4970         if (get_cur_block() == NULL)
4971                 return;
4972
4973         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4974         ir_node  *jump = new_d_Jmp(dbgi);
4975         add_immBlock_pred(target_block, jump);
4976
4977         set_cur_block(NULL);
4978 }
4979
4980 static ir_node *get_break_label(void)
4981 {
4982         if (break_label == NULL) {
4983                 break_label = new_immBlock();
4984         }
4985         return break_label;
4986 }
4987
4988 static void switch_statement_to_firm(switch_statement_t *statement)
4989 {
4990         ir_node  *first_block = NULL;
4991         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4992         ir_node  *cond        = NULL;
4993
4994         if (get_cur_block() != NULL) {
4995                 ir_node *expression = expression_to_firm(statement->expression);
4996                 cond                = new_d_Cond(dbgi, expression);
4997                 first_block         = get_cur_block();
4998         }
4999
5000         set_cur_block(NULL);
5001
5002         ir_node *const old_switch_cond       = current_switch_cond;
5003         ir_node *const old_break_label       = break_label;
5004         const bool     old_saw_default_label = saw_default_label;
5005         saw_default_label                    = false;
5006         current_switch_cond                  = cond;
5007         break_label                          = NULL;
5008         switch_statement_t *const old_switch = current_switch;
5009         current_switch                       = statement;
5010
5011         /* determine a free number for the default label */
5012         unsigned long num_cases = 0;
5013         long def_nr = 0;
5014         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5015                 if (l->expression == NULL) {
5016                         /* default case */
5017                         continue;
5018                 }
5019                 if (l->last_case >= l->first_case)
5020                         num_cases += l->last_case - l->first_case + 1;
5021                 if (l->last_case > def_nr)
5022                         def_nr = l->last_case;
5023         }
5024
5025         if (def_nr == INT_MAX) {
5026                 /* Bad: an overflow will occur, we cannot be sure that the
5027                  * maximum + 1 is a free number. Scan the values a second
5028                  * time to find a free number.
5029                  */
5030                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5031
5032                 memset(bits, 0, (num_cases + 7) >> 3);
5033                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5034                         if (l->expression == NULL) {
5035                                 /* default case */
5036                                 continue;
5037                         }
5038                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5039                         if (start < num_cases && l->last_case >= 0) {
5040                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5041                                         (unsigned long)l->last_case : num_cases - 1;
5042                                 for (unsigned long cns = start; cns <= end; ++cns) {
5043                                         bits[cns >> 3] |= (1 << (cns & 7));
5044                                 }
5045                         }
5046                 }
5047                 /* We look at the first num_cases constants:
5048                  * Either they are dense, so we took the last (num_cases)
5049                  * one, or they are not dense, so we will find one free
5050                  * there...
5051                  */
5052                 unsigned long i;
5053                 for (i = 0; i < num_cases; ++i)
5054                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5055                                 break;
5056
5057                 free(bits);
5058                 def_nr = i;
5059         } else {
5060                 ++def_nr;
5061         }
5062         statement->default_proj_nr = def_nr;
5063
5064         if (statement->body != NULL) {
5065                 statement_to_firm(statement->body);
5066         }
5067
5068         if (get_cur_block() != NULL) {
5069                 ir_node *jmp = new_Jmp();
5070                 add_immBlock_pred(get_break_label(), jmp);
5071         }
5072
5073         if (!saw_default_label && first_block != NULL) {
5074                 set_cur_block(first_block);
5075                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
5076                                                         statement->default_proj_nr);
5077                 add_immBlock_pred(get_break_label(), proj);
5078         }
5079
5080         if (break_label != NULL) {
5081                 mature_immBlock(break_label);
5082         }
5083         set_cur_block(break_label);
5084
5085         assert(current_switch_cond == cond);
5086         current_switch      = old_switch;
5087         current_switch_cond = old_switch_cond;
5088         break_label         = old_break_label;
5089         saw_default_label   = old_saw_default_label;
5090 }
5091
5092 static void case_label_to_firm(const case_label_statement_t *statement)
5093 {
5094         if (statement->is_empty_range)
5095                 return;
5096
5097         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5098
5099         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5100
5101         ir_node *proj;
5102         ir_node *block = new_immBlock();
5103
5104         if (current_switch_cond != NULL) {
5105                 set_cur_block(get_nodes_block(current_switch_cond));
5106                 if (statement->expression != NULL) {
5107                         long pn     = statement->first_case;
5108                         long end_pn = statement->last_case;
5109                         assert(pn <= end_pn);
5110                         /* create jumps for all cases in the given range */
5111                         do {
5112                                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5113                                 add_immBlock_pred(block, proj);
5114                         } while (pn++ < end_pn);
5115                 } else {
5116                         saw_default_label = true;
5117                         proj = new_d_defaultProj(dbgi, current_switch_cond,
5118                                                                          current_switch->default_proj_nr);
5119
5120                         add_immBlock_pred(block, proj);
5121                 }
5122         }
5123
5124         if (fallthrough != NULL) {
5125                 add_immBlock_pred(block, fallthrough);
5126         }
5127         mature_immBlock(block);
5128         set_cur_block(block);
5129
5130         if (statement->statement != NULL) {
5131                 statement_to_firm(statement->statement);
5132         }
5133 }
5134
5135 static void label_to_firm(const label_statement_t *statement)
5136 {
5137         ir_node *block = get_label_block(statement->label);
5138
5139         if (get_cur_block() != NULL) {
5140                 ir_node *jmp = new_Jmp();
5141                 add_immBlock_pred(block, jmp);
5142         }
5143
5144         set_cur_block(block);
5145         keep_alive(block);
5146         keep_all_memory(block);
5147
5148         if (statement->statement != NULL) {
5149                 statement_to_firm(statement->statement);
5150         }
5151 }
5152
5153 static void goto_to_firm(const goto_statement_t *statement)
5154 {
5155         if (get_cur_block() == NULL)
5156                 return;
5157
5158         if (statement->expression) {
5159                 ir_node  *irn  = expression_to_firm(statement->expression);
5160                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5161                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5162
5163                 set_irn_link(ijmp, ijmp_list);
5164                 ijmp_list = ijmp;
5165         } else {
5166                 ir_node *block = get_label_block(statement->label);
5167                 ir_node *jmp   = new_Jmp();
5168                 add_immBlock_pred(block, jmp);
5169         }
5170         set_cur_block(NULL);
5171 }
5172
5173 static void asm_statement_to_firm(const asm_statement_t *statement)
5174 {
5175         bool needs_memory = false;
5176
5177         if (statement->is_volatile) {
5178                 needs_memory = true;
5179         }
5180
5181         size_t         n_clobbers = 0;
5182         asm_clobber_t *clobber    = statement->clobbers;
5183         for ( ; clobber != NULL; clobber = clobber->next) {
5184                 const char *clobber_str = clobber->clobber.begin;
5185
5186                 if (!be_is_valid_clobber(clobber_str)) {
5187                         errorf(&statement->base.source_position,
5188                                    "invalid clobber '%s' specified", clobber->clobber);
5189                         continue;
5190                 }
5191
5192                 if (strcmp(clobber_str, "memory") == 0) {
5193                         needs_memory = true;
5194                         continue;
5195                 }
5196
5197                 ident *id = new_id_from_str(clobber_str);
5198                 obstack_ptr_grow(&asm_obst, id);
5199                 ++n_clobbers;
5200         }
5201         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5202         ident **clobbers = NULL;
5203         if (n_clobbers > 0) {
5204                 clobbers = obstack_finish(&asm_obst);
5205         }
5206
5207         size_t n_inputs  = 0;
5208         asm_argument_t *argument = statement->inputs;
5209         for ( ; argument != NULL; argument = argument->next)
5210                 n_inputs++;
5211         size_t n_outputs = 0;
5212         argument = statement->outputs;
5213         for ( ; argument != NULL; argument = argument->next)
5214                 n_outputs++;
5215
5216         unsigned next_pos = 0;
5217
5218         ir_node *ins[n_inputs + n_outputs + 1];
5219         size_t   in_size = 0;
5220
5221         ir_asm_constraint tmp_in_constraints[n_outputs];
5222
5223         const expression_t *out_exprs[n_outputs];
5224         ir_node            *out_addrs[n_outputs];
5225         size_t              out_size = 0;
5226
5227         argument = statement->outputs;
5228         for ( ; argument != NULL; argument = argument->next) {
5229                 const char *constraints = argument->constraints.begin;
5230                 asm_constraint_flags_t asm_flags
5231                         = be_parse_asm_constraints(constraints);
5232
5233                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5234                         warningf(&statement->base.source_position,
5235                                "some constraints in '%s' are not supported", constraints);
5236                 }
5237                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5238                         errorf(&statement->base.source_position,
5239                                "some constraints in '%s' are invalid", constraints);
5240                         continue;
5241                 }
5242                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5243                         errorf(&statement->base.source_position,
5244                                "no write flag specified for output constraints '%s'",
5245                                constraints);
5246                         continue;
5247                 }
5248
5249                 unsigned pos = next_pos++;
5250                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5251                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5252                         expression_t *expr = argument->expression;
5253                         ir_node      *addr = expression_to_addr(expr);
5254                         /* in+output, construct an artifical same_as constraint on the
5255                          * input */
5256                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5257                                 char     buf[64];
5258                                 ir_node *value = get_value_from_lvalue(expr, addr);
5259
5260                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5261
5262                                 ir_asm_constraint constraint;
5263                                 constraint.pos              = pos;
5264                                 constraint.constraint       = new_id_from_str(buf);
5265                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5266                                 tmp_in_constraints[in_size] = constraint;
5267                                 ins[in_size] = value;
5268
5269                                 ++in_size;
5270                         }
5271
5272                         out_exprs[out_size] = expr;
5273                         out_addrs[out_size] = addr;
5274                         ++out_size;
5275                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5276                         /* pure memory ops need no input (but we have to make sure we
5277                          * attach to the memory) */
5278                         assert(! (asm_flags &
5279                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5280                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5281                         needs_memory = true;
5282
5283                         /* we need to attach the address to the inputs */
5284                         expression_t *expr = argument->expression;
5285
5286                         ir_asm_constraint constraint;
5287                         constraint.pos              = pos;
5288                         constraint.constraint       = new_id_from_str(constraints);
5289                         constraint.mode             = NULL;
5290                         tmp_in_constraints[in_size] = constraint;
5291
5292                         ins[in_size]          = expression_to_addr(expr);
5293                         ++in_size;
5294                         continue;
5295                 } else {
5296                         errorf(&statement->base.source_position,
5297                                "only modifiers but no place set in constraints '%s'",
5298                                constraints);
5299                         continue;
5300                 }
5301
5302                 ir_asm_constraint constraint;
5303                 constraint.pos        = pos;
5304                 constraint.constraint = new_id_from_str(constraints);
5305                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5306
5307                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5308         }
5309         assert(obstack_object_size(&asm_obst)
5310                         == out_size * sizeof(ir_asm_constraint));
5311         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5312
5313
5314         obstack_grow(&asm_obst, tmp_in_constraints,
5315                      in_size * sizeof(tmp_in_constraints[0]));
5316         /* find and count input and output arguments */
5317         argument = statement->inputs;
5318         for ( ; argument != NULL; argument = argument->next) {
5319                 const char *constraints = argument->constraints.begin;
5320                 asm_constraint_flags_t asm_flags
5321                         = be_parse_asm_constraints(constraints);
5322
5323                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5324                         errorf(&statement->base.source_position,
5325                                "some constraints in '%s' are not supported", constraints);
5326                         continue;
5327                 }
5328                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5329                         errorf(&statement->base.source_position,
5330                                "some constraints in '%s' are invalid", constraints);
5331                         continue;
5332                 }
5333                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5334                         errorf(&statement->base.source_position,
5335                                "write flag specified for input constraints '%s'",
5336                                constraints);
5337                         continue;
5338                 }
5339
5340                 ir_node *input;
5341                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5342                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5343                         /* we can treat this as "normal" input */
5344                         input = expression_to_firm(argument->expression);
5345                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5346                         /* pure memory ops need no input (but we have to make sure we
5347                          * attach to the memory) */
5348                         assert(! (asm_flags &
5349                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5350                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5351                         needs_memory = true;
5352                         input = expression_to_addr(argument->expression);
5353                 } else {
5354                         errorf(&statement->base.source_position,
5355                                "only modifiers but no place set in constraints '%s'",
5356                                constraints);
5357                         continue;
5358                 }
5359
5360                 ir_asm_constraint constraint;
5361                 constraint.pos        = next_pos++;
5362                 constraint.constraint = new_id_from_str(constraints);
5363                 constraint.mode       = get_irn_mode(input);
5364
5365                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5366                 ins[in_size++] = input;
5367         }
5368
5369         if (needs_memory) {
5370                 ir_asm_constraint constraint;
5371                 constraint.pos        = next_pos++;
5372                 constraint.constraint = new_id_from_str("");
5373                 constraint.mode       = mode_M;
5374
5375                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5376                 ins[in_size++] = get_store();
5377         }
5378
5379         assert(obstack_object_size(&asm_obst)
5380                         == in_size * sizeof(ir_asm_constraint));
5381         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5382
5383         /* create asm node */
5384         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5385
5386         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5387
5388         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5389                                   out_size, output_constraints,
5390                                   n_clobbers, clobbers, asm_text);
5391
5392         if (statement->is_volatile) {
5393                 set_irn_pinned(node, op_pin_state_pinned);
5394         } else {
5395                 set_irn_pinned(node, op_pin_state_floats);
5396         }
5397
5398         /* create output projs & connect them */
5399         if (needs_memory) {
5400                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5401                 set_store(projm);
5402         }
5403
5404         size_t i;
5405         for (i = 0; i < out_size; ++i) {
5406                 const expression_t *out_expr = out_exprs[i];
5407                 long                pn       = i;
5408                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5409                 ir_node            *proj     = new_Proj(node, mode, pn);
5410                 ir_node            *addr     = out_addrs[i];
5411
5412                 set_value_for_expression_addr(out_expr, proj, addr);
5413         }
5414 }
5415
5416 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5417 {
5418         statement_to_firm(statement->try_statement);
5419         warningf(&statement->base.source_position, "structured exception handling ignored");
5420 }
5421
5422 static void     leave_statement_to_firm(leave_statement_t *statement)
5423 {
5424         errorf(&statement->base.source_position, "__leave not supported yet");
5425 }
5426
5427 /**
5428  * Transform a statement.
5429  */
5430 static void statement_to_firm(statement_t *statement)
5431 {
5432 #ifndef NDEBUG
5433         assert(!statement->base.transformed);
5434         statement->base.transformed = true;
5435 #endif
5436
5437         switch (statement->kind) {
5438         case STATEMENT_INVALID:
5439                 panic("invalid statement found");
5440         case STATEMENT_EMPTY:
5441                 /* nothing */
5442                 return;
5443         case STATEMENT_COMPOUND:
5444                 compound_statement_to_firm(&statement->compound);
5445                 return;
5446         case STATEMENT_RETURN:
5447                 return_statement_to_firm(&statement->returns);
5448                 return;
5449         case STATEMENT_EXPRESSION:
5450                 expression_statement_to_firm(&statement->expression);
5451                 return;
5452         case STATEMENT_IF:
5453                 if_statement_to_firm(&statement->ifs);
5454                 return;
5455         case STATEMENT_WHILE:
5456                 while_statement_to_firm(&statement->whiles);
5457                 return;
5458         case STATEMENT_DO_WHILE:
5459                 do_while_statement_to_firm(&statement->do_while);
5460                 return;
5461         case STATEMENT_DECLARATION:
5462                 declaration_statement_to_firm(&statement->declaration);
5463                 return;
5464         case STATEMENT_BREAK:
5465                 create_jump_statement(statement, get_break_label());
5466                 return;
5467         case STATEMENT_CONTINUE:
5468                 create_jump_statement(statement, continue_label);
5469                 return;
5470         case STATEMENT_SWITCH:
5471                 switch_statement_to_firm(&statement->switchs);
5472                 return;
5473         case STATEMENT_CASE_LABEL:
5474                 case_label_to_firm(&statement->case_label);
5475                 return;
5476         case STATEMENT_FOR:
5477                 for_statement_to_firm(&statement->fors);
5478                 return;
5479         case STATEMENT_LABEL:
5480                 label_to_firm(&statement->label);
5481                 return;
5482         case STATEMENT_GOTO:
5483                 goto_to_firm(&statement->gotos);
5484                 return;
5485         case STATEMENT_ASM:
5486                 asm_statement_to_firm(&statement->asms);
5487                 return;
5488         case STATEMENT_MS_TRY:
5489                 ms_try_statement_to_firm(&statement->ms_try);
5490                 return;
5491         case STATEMENT_LEAVE:
5492                 leave_statement_to_firm(&statement->leave);
5493                 return;
5494         }
5495         panic("statement not implemented");
5496 }
5497
5498 static int count_local_variables(const entity_t *entity,
5499                                  const entity_t *const last)
5500 {
5501         int count = 0;
5502         entity_t const *const end = last != NULL ? last->base.next : NULL;
5503         for (; entity != end; entity = entity->base.next) {
5504                 type_t *type;
5505                 bool    address_taken;
5506
5507                 if (entity->kind == ENTITY_VARIABLE) {
5508                         type          = skip_typeref(entity->declaration.type);
5509                         address_taken = entity->variable.address_taken;
5510                 } else if (entity->kind == ENTITY_PARAMETER) {
5511                         type          = skip_typeref(entity->declaration.type);
5512                         address_taken = entity->parameter.address_taken;
5513                 } else {
5514                         continue;
5515                 }
5516
5517                 if (!address_taken && is_type_scalar(type))
5518                         ++count;
5519         }
5520         return count;
5521 }
5522
5523 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5524 {
5525         int *const count = env;
5526
5527         switch (stmt->kind) {
5528         case STATEMENT_DECLARATION: {
5529                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5530                 *count += count_local_variables(decl_stmt->declarations_begin,
5531                                 decl_stmt->declarations_end);
5532                 break;
5533         }
5534
5535         case STATEMENT_FOR:
5536                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5537                 break;
5538
5539         default:
5540                 break;
5541         }
5542 }
5543
5544 /**
5545  * Return the number of local (alias free) variables used by a function.
5546  */
5547 static int get_function_n_local_vars(entity_t *entity)
5548 {
5549         const function_t *function = &entity->function;
5550         int count = 0;
5551
5552         /* count parameters */
5553         count += count_local_variables(function->parameters.entities, NULL);
5554
5555         /* count local variables declared in body */
5556         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5557         return count;
5558 }
5559
5560 /**
5561  * Build Firm code for the parameters of a function.
5562  */
5563 static void initialize_function_parameters(entity_t *entity)
5564 {
5565         assert(entity->kind == ENTITY_FUNCTION);
5566         ir_graph *irg             = current_ir_graph;
5567         ir_node  *args            = get_irg_args(irg);
5568         ir_node  *start_block     = get_irg_start_block(irg);
5569         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5570         int      first_param_nr   = 0;
5571
5572         if (entity->function.need_closure) {
5573                 /* add an extra parameter for the static link */
5574                 entity->function.static_link = new_r_Proj(start_block, args, mode_P_data, 0);
5575                 ++first_param_nr;
5576         }
5577
5578         int       n         = 0;
5579         entity_t *parameter = entity->function.parameters.entities;
5580         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5581                 if (parameter->kind != ENTITY_PARAMETER)
5582                         continue;
5583
5584                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5585                 type_t *type = skip_typeref(parameter->declaration.type);
5586
5587                 bool needs_entity = parameter->parameter.address_taken;
5588                 assert(!is_type_array(type));
5589                 if (is_type_compound(type)) {
5590                         needs_entity = true;
5591                 }
5592
5593                 if (needs_entity) {
5594                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5595                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5596                         set_entity_ident(entity, id);
5597
5598                         parameter->declaration.kind
5599                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5600                         parameter->parameter.v.entity = entity;
5601                         continue;
5602                 }
5603
5604                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5605                 ir_mode *param_mode   = get_type_mode(param_irtype);
5606
5607                 long     pn    = n + first_param_nr;
5608                 ir_node *value = new_r_Proj(start_block, args, param_mode, pn);
5609
5610                 ir_mode *mode = get_ir_mode_storage(type);
5611                 value = create_conv(NULL, value, mode);
5612                 value = do_strict_conv(NULL, value);
5613
5614                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5615                 parameter->parameter.v.value_number = next_value_number_function;
5616                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5617                                         parameter);
5618                 ++next_value_number_function;
5619
5620                 set_value(parameter->parameter.v.value_number, value);
5621         }
5622 }
5623
5624 /**
5625  * Handle additional decl modifiers for IR-graphs
5626  *
5627  * @param irg            the IR-graph
5628  * @param dec_modifiers  additional modifiers
5629  */
5630 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5631                                      decl_modifiers_t decl_modifiers)
5632 {
5633         if (decl_modifiers & DM_RETURNS_TWICE) {
5634                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5635                 set_irg_additional_property(irg, mtp_property_returns_twice);
5636         }
5637         if (decl_modifiers & DM_NORETURN) {
5638                 /* TRUE if the declaration includes the Microsoft
5639                    __declspec(noreturn) specifier. */
5640                 set_irg_additional_property(irg, mtp_property_noreturn);
5641         }
5642         if (decl_modifiers & DM_NOTHROW) {
5643                 /* TRUE if the declaration includes the Microsoft
5644                    __declspec(nothrow) specifier. */
5645                 set_irg_additional_property(irg, mtp_property_nothrow);
5646         }
5647         if (decl_modifiers & DM_NAKED) {
5648                 /* TRUE if the declaration includes the Microsoft
5649                    __declspec(naked) specifier. */
5650                 set_irg_additional_property(irg, mtp_property_naked);
5651         }
5652         if (decl_modifiers & DM_FORCEINLINE) {
5653                 /* TRUE if the declaration includes the
5654                    Microsoft __forceinline specifier. */
5655                 set_irg_inline_property(irg, irg_inline_forced);
5656         }
5657         if (decl_modifiers & DM_NOINLINE) {
5658                 /* TRUE if the declaration includes the Microsoft
5659                    __declspec(noinline) specifier. */
5660                 set_irg_inline_property(irg, irg_inline_forbidden);
5661         }
5662 }
5663
5664 static void add_function_pointer(ir_type *segment, ir_entity *method,
5665                                  const char *unique_template)
5666 {
5667         ir_type   *method_type  = get_entity_type(method);
5668         ident     *id           = id_unique(unique_template);
5669         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5670
5671         ident     *ide          = id_unique(unique_template);
5672         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5673         ir_graph  *irg          = get_const_code_irg();
5674         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5675                                                            method, NULL);
5676
5677         set_entity_compiler_generated(ptr, 1);
5678         set_entity_variability(ptr, variability_constant);
5679         set_atomic_ent_value(ptr, val);
5680 }
5681
5682 /**
5683  * Generate possible IJmp branches to a given label block.
5684  */
5685 static void gen_ijmp_branches(ir_node *block)
5686 {
5687         ir_node *ijmp;
5688         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5689                 add_immBlock_pred(block, ijmp);
5690         }
5691 }
5692
5693 /**
5694  * Create code for a function and all inner functions.
5695  *
5696  * @param entity  the function entity
5697  */
5698 static void create_function(entity_t *entity)
5699 {
5700         assert(entity->kind == ENTITY_FUNCTION);
5701         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5702
5703         if (entity->function.statement == NULL)
5704                 return;
5705
5706         if (is_main(entity) && firm_opt.os_support == OS_SUPPORT_MINGW) {
5707                 prepare_main_collect2(entity);
5708         }
5709
5710         inner_functions     = NULL;
5711         current_trampolines = NULL;
5712
5713         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5714                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5715                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5716         }
5717         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5718                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5719                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5720         }
5721
5722         current_function_entity = entity;
5723         current_function_name   = NULL;
5724         current_funcsig         = NULL;
5725
5726         assert(all_labels == NULL);
5727         all_labels = NEW_ARR_F(label_t *, 0);
5728         ijmp_list  = NULL;
5729
5730         int       n_local_vars = get_function_n_local_vars(entity);
5731         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5732
5733         ir_graph *old_current_function = current_function;
5734         current_function = irg;
5735
5736         set_irg_fp_model(irg, firm_opt.fp_model);
5737         tarval_enable_fp_ops(1);
5738         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5739
5740         ir_node *first_block = get_cur_block();
5741
5742         /* set inline flags */
5743         if (entity->function.is_inline)
5744                 set_irg_inline_property(irg, irg_inline_recomended);
5745         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5746
5747         next_value_number_function = 0;
5748         initialize_function_parameters(entity);
5749         current_static_link = entity->function.static_link;
5750
5751         statement_to_firm(entity->function.statement);
5752
5753         ir_node *end_block = get_irg_end_block(irg);
5754
5755         /* do we have a return statement yet? */
5756         if (get_cur_block() != NULL) {
5757                 type_t *type = skip_typeref(entity->declaration.type);
5758                 assert(is_type_function(type));
5759                 const function_type_t *func_type   = &type->function;
5760                 const type_t          *return_type
5761                         = skip_typeref(func_type->return_type);
5762
5763                 ir_node *ret;
5764                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5765                         ret = new_Return(get_store(), 0, NULL);
5766                 } else {
5767                         ir_mode *mode;
5768                         if (is_type_scalar(return_type)) {
5769                                 mode = get_ir_mode_storage(func_type->return_type);
5770                         } else {
5771                                 mode = mode_P_data;
5772                         }
5773
5774                         ir_node *in[1];
5775                         /* §5.1.2.2.3 main implicitly returns 0 */
5776                         if (is_main(entity)) {
5777                                 in[0] = new_Const(get_mode_null(mode));
5778                         } else {
5779                                 in[0] = new_Unknown(mode);
5780                         }
5781                         ret = new_Return(get_store(), 1, in);
5782                 }
5783                 add_immBlock_pred(end_block, ret);
5784         }
5785
5786         bool has_computed_gotos = false;
5787         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5788                 label_t *label = all_labels[i];
5789                 if (label->address_taken) {
5790                         gen_ijmp_branches(label->block);
5791                         has_computed_gotos = true;
5792                 }
5793                 mature_immBlock(label->block);
5794         }
5795         if (has_computed_gotos) {
5796                 /* if we have computed goto's in the function, we cannot inline it */
5797                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5798                         warningf(&entity->base.source_position,
5799                                  "function '%Y' can never be inlined because it contains a computed goto",
5800                                  entity->base.symbol);
5801                 }
5802                 set_irg_inline_property(irg, irg_inline_forbidden);
5803         }
5804
5805         DEL_ARR_F(all_labels);
5806         all_labels = NULL;
5807
5808         mature_immBlock(first_block);
5809         mature_immBlock(end_block);
5810
5811         irg_finalize_cons(irg);
5812
5813         /* finalize the frame type */
5814         ir_type *frame_type = get_irg_frame_type(irg);
5815         int      n          = get_compound_n_members(frame_type);
5816         int      align_all  = 4;
5817         int      offset     = 0;
5818         for (int i = 0; i < n; ++i) {
5819                 ir_entity *entity      = get_compound_member(frame_type, i);
5820                 ir_type   *entity_type = get_entity_type(entity);
5821
5822                 int align = get_type_alignment_bytes(entity_type);
5823                 if (align > align_all)
5824                         align_all = align;
5825                 int misalign = 0;
5826                 if (align > 0) {
5827                         misalign  = offset % align;
5828                         if (misalign > 0) {
5829                                 offset += align - misalign;
5830                         }
5831                 }
5832
5833                 set_entity_offset(entity, offset);
5834                 offset += get_type_size_bytes(entity_type);
5835         }
5836         set_type_size_bytes(frame_type, offset);
5837         set_type_alignment_bytes(frame_type, align_all);
5838
5839         irg_vrfy(irg);
5840         current_function = old_current_function;
5841
5842         if (current_trampolines != NULL) {
5843                 DEL_ARR_F(current_trampolines);
5844                 current_trampolines = NULL;
5845         }
5846
5847         /* create inner functions if any */
5848         entity_t **inner = inner_functions;
5849         if (inner != NULL) {
5850                 ir_type *rem_outer_frame      = current_outer_frame;
5851                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5852                 ir_type *rem_outer_value_type = current_outer_value_type;
5853                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5854                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5855                         create_function(inner[i]);
5856                 }
5857                 DEL_ARR_F(inner);
5858
5859                 current_outer_value_type = rem_outer_value_type;
5860                 current_outer_frame      = rem_outer_frame;
5861         }
5862 }
5863
5864 static void scope_to_firm(scope_t *scope)
5865 {
5866         /* first pass: create declarations */
5867         entity_t *entity = scope->entities;
5868         for ( ; entity != NULL; entity = entity->base.next) {
5869                 if (entity->base.symbol == NULL)
5870                         continue;
5871
5872                 if (entity->kind == ENTITY_FUNCTION) {
5873                         if (entity->function.btk != bk_none) {
5874                                 /* builtins have no representation */
5875                                 continue;
5876                         }
5877                         (void)get_function_entity(entity, NULL);
5878                 } else if (entity->kind == ENTITY_VARIABLE) {
5879                         create_global_variable(entity);
5880                 } else if (entity->kind == ENTITY_NAMESPACE) {
5881                         scope_to_firm(&entity->namespacee.members);
5882                 }
5883         }
5884
5885         /* second pass: create code/initializers */
5886         entity = scope->entities;
5887         for ( ; entity != NULL; entity = entity->base.next) {
5888                 if (entity->base.symbol == NULL)
5889                         continue;
5890
5891                 if (entity->kind == ENTITY_FUNCTION) {
5892                         if (entity->function.btk != bk_none) {
5893                                 /* builtins have no representation */
5894                                 continue;
5895                         }
5896                         create_function(entity);
5897                 } else if (entity->kind == ENTITY_VARIABLE) {
5898                         assert(entity->declaration.kind
5899                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5900                         current_ir_graph = get_const_code_irg();
5901                         create_variable_initializer(entity);
5902                 }
5903         }
5904 }
5905
5906 void init_ast2firm(void)
5907 {
5908         obstack_init(&asm_obst);
5909         init_atomic_modes();
5910
5911         /* OS option must be set to the backend */
5912         switch (firm_opt.os_support) {
5913         case OS_SUPPORT_MINGW:
5914                 create_ld_ident = create_name_win32;
5915                 break;
5916         case OS_SUPPORT_LINUX:
5917                 create_ld_ident = create_name_linux_elf;
5918                 break;
5919         case OS_SUPPORT_MACHO:
5920                 create_ld_ident = create_name_macho;
5921                 break;
5922         default:
5923                 panic("unexpected OS support mode");
5924         }
5925
5926         /* create idents for all known runtime functions */
5927         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5928                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5929         }
5930
5931         entitymap_init(&entitymap);
5932 }
5933
5934 static void init_ir_types(void)
5935 {
5936         static int ir_types_initialized = 0;
5937         if (ir_types_initialized)
5938                 return;
5939         ir_types_initialized = 1;
5940
5941         ir_type_int        = get_ir_type(type_int);
5942         ir_type_char       = get_ir_type(type_char);
5943         ir_type_const_char = get_ir_type(type_const_char);
5944         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5945         ir_type_void       = get_ir_type(type_void);
5946
5947         be_params             = be_get_backend_param();
5948         mode_float_arithmetic = be_params->mode_float_arithmetic;
5949
5950         stack_param_align     = be_params->stack_param_align;
5951 }
5952
5953 void exit_ast2firm(void)
5954 {
5955         entitymap_destroy(&entitymap);
5956         obstack_free(&asm_obst, NULL);
5957 }
5958
5959 static void global_asm_to_firm(statement_t *s)
5960 {
5961         for (; s != NULL; s = s->base.next) {
5962                 assert(s->kind == STATEMENT_ASM);
5963
5964                 char const *const text = s->asms.asm_text.begin;
5965                 size_t            size = s->asms.asm_text.size;
5966
5967                 /* skip the last \0 */
5968                 if (text[size - 1] == '\0')
5969                         --size;
5970
5971                 ident *const id = new_id_from_chars(text, size);
5972                 add_irp_asm(id);
5973         }
5974 }
5975
5976 void translation_unit_to_firm(translation_unit_t *unit)
5977 {
5978         /* just to be sure */
5979         continue_label           = NULL;
5980         break_label              = NULL;
5981         current_switch_cond      = NULL;
5982         current_translation_unit = unit;
5983
5984         init_ir_types();
5985
5986         scope_to_firm(&unit->scope);
5987         global_asm_to_firm(unit->global_asm);
5988
5989         current_ir_graph         = NULL;
5990         current_translation_unit = NULL;
5991 }