nsz Git - cparser/blob - ast2firm.c

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