nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "printer.h"
  50 #include "entitymap_t.h"
  51 #include "driver/firm_opt.h"
  52 #include "driver/firm_cmdline.h"
  53
  54 typedef struct trampoline_region trampoline_region;
  55 struct trampoline_region {
  56         ir_entity        *function;    /**< The function that is called by this trampoline */
  57         ir_entity        *region;      /**< created region for the trampoline */
  58 };
  59
  60 static const backend_params *be_params;
  61
  62 static ir_type *ir_type_char;
  63 static ir_type *ir_type_const_char;
  64 static ir_type *ir_type_wchar_t;
  65 static ir_type *ir_type_void;
  66 static ir_type *ir_type_int;
  67
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int        next_value_number_function;
  75 static ir_node   *continue_label;
  76 static ir_node   *break_label;
  77 static ir_node   *current_switch_cond;
  78 static bool       saw_default_label;
  79 static label_t  **all_labels;
  80 static entity_t **inner_functions;
  81 static ir_node   *ijmp_list;
  82 static bool       constant_folding;
  83 static bool       initializer_use_bitfield_basetype;
  84
  85 extern bool       have_const_functions;
  86
  87 static const entity_t     *current_function_entity;
  88 static ir_node            *current_function_name;
  89 static ir_node            *current_funcsig;
  90 static switch_statement_t *current_switch;
  91 static ir_graph           *current_function;
  92 static translation_unit_t *current_translation_unit;
  93 static trampoline_region  *current_trampolines;
  94 static ir_type            *current_outer_frame;
  95 static ir_type            *current_outer_value_type;
  96 static ir_node            *current_static_link;
  97
  98 static entitymap_t  entitymap;
  99
 100 static struct obstack asm_obst;
 101
 102 typedef enum declaration_kind_t {
 103         DECLARATION_KIND_UNKNOWN,
 104         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 105         DECLARATION_KIND_GLOBAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE,
 107         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 108         DECLARATION_KIND_PARAMETER,
 109         DECLARATION_KIND_PARAMETER_ENTITY,
 110         DECLARATION_KIND_FUNCTION,
 111         DECLARATION_KIND_COMPOUND_MEMBER,
 112         DECLARATION_KIND_INNER_FUNCTION
 113 } declaration_kind_t;
 114
 115 static ir_mode *get_ir_mode_storage(type_t *type);
 116 /*
 117  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 118  * int that it returns bigger modes for floating point on some platforms
 119  * (x87 internally does arithemtic with 80bits)
 120  */
 121 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 122
 123 static ir_type *get_ir_type_incomplete(type_t *type);
 124
 125 static void enqueue_inner_function(entity_t *entity)
 126 {
 127         if (inner_functions == NULL)
 128                 inner_functions = NEW_ARR_F(entity_t *, 0);
 129         ARR_APP1(entity_t*, inner_functions, entity);
 130 }
 131
 132 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 133 {
 134         const entity_t *entity = get_irg_loc_description(irg, pos);
 135
 136         if (entity != NULL) {
 137                 warningf(&entity->base.source_position,
 138                          "%s '%#T' might be used uninitialized",
 139                          get_entity_kind_name(entity->kind),
 140                          entity->declaration.type, entity->base.symbol);
 141         }
 142         return new_r_Unknown(irg, mode);
 143 }
 144
 145 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 146 {
 147         const source_position_t *pos = (const source_position_t*) dbg;
 148         if (pos == NULL)
 149                 return NULL;
 150         if (line != NULL)
 151                 *line = pos->linenr;
 152         return pos->input_name;
 153 }
 154
 155 static dbg_info *get_dbg_info(const source_position_t *pos)
 156 {
 157         return (dbg_info*) pos;
 158 }
 159
 160 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 161                                     const type_dbg_info *dbg)
 162 {
 163         assert(dbg != NULL);
 164         print_to_buffer(buffer, buffer_size);
 165         const type_t *type = (const type_t*) dbg;
 166         print_type(type);
 167         finish_print_to_buffer();
 168 }
 169
 170 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 171 {
 172         return (type_dbg_info*) type;
 173 }
 174
 175 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 176
 177 static ir_mode *mode_int, *mode_uint;
 178
 179 static ir_node *_expression_to_firm(const expression_t *expression);
 180 static ir_node *expression_to_firm(const expression_t *expression);
 181 static void create_local_declaration(entity_t *entity);
 182
 183 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 184 {
 185         unsigned flags = get_atomic_type_flags(kind);
 186         unsigned size  = get_atomic_type_size(kind);
 187         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 188                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 189                 char            name[64];
 190                 ir_mode_sort    sort;
 191                 unsigned        bit_size     = size * 8;
 192                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 193                 unsigned        modulo_shift;
 194                 ir_mode_arithmetic arithmetic;
 195
 196                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 197                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 198                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 199                                  bit_size);
 200                         sort         = irms_int_number;
 201                         arithmetic   = irma_twos_complement;
 202                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 203                 } else {
 204                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 205                         snprintf(name, sizeof(name), "F%u", bit_size);
 206                         sort         = irms_float_number;
 207                         arithmetic   = irma_ieee754;
 208                         modulo_shift = 0;
 209                 }
 210                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 211                                    modulo_shift);
 212         }
 213
 214         return NULL;
 215 }
 216
 217 /**
 218  * Initialises the atomic modes depending on the machine size.
 219  */
 220 static void init_atomic_modes(void)
 221 {
 222         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 223                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 224         }
 225         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 226         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 227
 228         /* there's no real void type in firm */
 229         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 230
 231         /* initialize pointer modes */
 232         char            name[64];
 233         ir_mode_sort    sort         = irms_reference;
 234         unsigned        bit_size     = machine_size;
 235         bool            is_signed    = 0;
 236         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 237         unsigned        modulo_shift
 238                 = bit_size < machine_size ? machine_size : bit_size;
 239
 240         snprintf(name, sizeof(name), "p%u", machine_size);
 241         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 242                                         modulo_shift);
 243
 244         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 245         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 246
 247         /* Hmm, pointers should be machine size */
 248         set_modeP_data(ptr_mode);
 249         set_modeP_code(ptr_mode);
 250 }
 251
 252 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 253 {
 254         assert(kind <= ATOMIC_TYPE_LAST);
 255         return atomic_modes[kind];
 256 }
 257
 258 static ir_node *get_vla_size(array_type_t *const type)
 259 {
 260         ir_node *size_node = type->size_node;
 261         if (size_node == NULL) {
 262                 size_node = expression_to_firm(type->size_expression);
 263                 type->size_node = size_node;
 264         }
 265         return size_node;
 266 }
 267
 268 /**
 269  * Return a node representing the size of a type.
 270  */
 271 static ir_node *get_type_size_node(type_t *type)
 272 {
 273         type = skip_typeref(type);
 274
 275         if (is_type_array(type) && type->array.is_vla) {
 276                 ir_node *size_node = get_vla_size(&type->array);
 277                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 278                 ir_mode *mode      = get_irn_mode(size_node);
 279                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 280                 return real_size;
 281         }
 282
 283         ir_mode *mode = get_ir_mode_storage(type_size_t);
 284         symconst_symbol sym;
 285         sym.type_p = get_ir_type(type);
 286         return new_SymConst(mode, sym, symconst_type_size);
 287 }
 288
 289 static unsigned count_parameters(const function_type_t *function_type)
 290 {
 291         unsigned count = 0;
 292
 293         function_parameter_t *parameter = function_type->parameters;
 294         for ( ; parameter != NULL; parameter = parameter->next) {
 295                 ++count;
 296         }
 297
 298         return count;
 299 }
 300
 301 /**
 302  * Creates a Firm type for an atomic type
 303  */
 304 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 305 {
 306         ir_mode        *mode      = atomic_modes[akind];
 307         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 308         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 309         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 310
 311         set_type_alignment_bytes(irtype, alignment);
 312
 313         return irtype;
 314 }
 315
 316 /**
 317  * Creates a Firm type for a complex type
 318  */
 319 static ir_type *create_complex_type(const complex_type_t *type)
 320 {
 321         atomic_type_kind_t  kind = type->akind;
 322         ir_mode            *mode = atomic_modes[kind];
 323         ident              *id   = get_mode_ident(mode);
 324
 325         (void) id;
 326
 327         /* FIXME: finish the array */
 328         return NULL;
 329 }
 330
 331 /**
 332  * Creates a Firm type for an imaginary type
 333  */
 334 static ir_type *create_imaginary_type(imaginary_type_t *type)
 335 {
 336         return create_atomic_type(type->akind, (const type_t*) type);
 337 }
 338
 339 /**
 340  * return type of a parameter (and take transparent union gnu extension into
 341  * account)
 342  */
 343 static type_t *get_parameter_type(type_t *orig_type)
 344 {
 345         type_t *type = skip_typeref(orig_type);
 346         if (is_type_union(type)
 347                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 348                 compound_t *compound = type->compound.compound;
 349                 type                 = compound->members.entities->declaration.type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 356 {
 357         type_t        *return_type  = skip_typeref(function_type->return_type);
 358
 359         int            n_parameters = count_parameters(function_type)
 360                                        + (for_closure ? 1 : 0);
 361         int            n_results    = return_type == type_void ? 0 : 1;
 362         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 363         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         if (for_closure) {
 373                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 374                 set_method_param_type(irtype, n, p_irtype);
 375                 ++n;
 376         }
 377         for ( ; parameter != NULL; parameter = parameter->next) {
 378                 type_t  *type     = get_parameter_type(parameter->type);
 379                 ir_type *p_irtype = get_ir_type(type);
 380                 set_method_param_type(irtype, n, p_irtype);
 381                 ++n;
 382         }
 383
 384         bool is_variadic = function_type->variadic;
 385
 386         if (is_variadic)
 387                 set_method_variadicity(irtype, variadicity_variadic);
 388
 389         unsigned cc = get_method_calling_convention(irtype);
 390         switch (function_type->calling_convention) {
 391         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 392         case CC_CDECL:
 393 is_cdecl:
 394                 set_method_calling_convention(irtype, SET_CDECL(cc));
 395                 break;
 396
 397         case CC_STDCALL:
 398                 if (is_variadic)
 399                         goto is_cdecl;
 400
 401                 /* only non-variadic function can use stdcall, else use cdecl */
 402                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 403                 break;
 404
 405         case CC_FASTCALL:
 406                 if (is_variadic)
 407                         goto is_cdecl;
 408                 /* only non-variadic function can use fastcall, else use cdecl */
 409                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 410                 break;
 411
 412         case CC_THISCALL:
 413                 /* Hmm, leave default, not accepted by the parser yet. */
 414                 break;
 415         }
 416
 417         if (for_closure)
 418                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 419
 420         return irtype;
 421 }
 422
 423 static ir_type *create_pointer_type(pointer_type_t *type)
 424 {
 425         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 426         type_t        *points_to    = type->points_to;
 427         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 428         ir_type       *ir_type      = new_d_type_pointer(ir_points_to, dbgi);
 429
 430         return ir_type;
 431 }
 432
 433 static ir_type *create_reference_type(reference_type_t *type)
 434 {
 435         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 436         type_t        *refers_to    = type->refers_to;
 437         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 438         ir_type       *ir_type      = new_d_type_pointer(ir_refers_to, dbgi);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_type *create_array_type(array_type_t *type)
 444 {
 445         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 446         type_t        *element_type    = type->element_type;
 447         ir_type       *ir_element_type = get_ir_type(element_type);
 448         ir_type       *ir_type         = new_d_type_array(1, ir_element_type, dbgi);
 449
 450         const int align = get_type_alignment_bytes(ir_element_type);
 451         set_type_alignment_bytes(ir_type, align);
 452
 453         if (type->size_constant) {
 454                 int n_elements = type->size;
 455
 456                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 457
 458                 size_t elemsize = get_type_size_bytes(ir_element_type);
 459                 if (elemsize % align > 0) {
 460                         elemsize += align - (elemsize % align);
 461                 }
 462                 set_type_size_bytes(ir_type, n_elements * elemsize);
 463         } else {
 464                 set_array_lower_bound_int(ir_type, 0, 0);
 465         }
 466         set_type_state(ir_type, layout_fixed);
 467
 468         return ir_type;
 469 }
 470
 471 /**
 472  * Return the signed integer type of size bits.
 473  *
 474  * @param size   the size
 475  */
 476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 477                                                  unsigned size,
 478                                                                                                  const type_t *type)
 479 {
 480         static ir_mode *s_modes[64 + 1] = {NULL, };
 481         ir_type *res;
 482         ir_mode *mode;
 483
 484         if (size <= 0 || size > 64)
 485                 return NULL;
 486
 487         mode = s_modes[size];
 488         if (mode == NULL) {
 489                 char name[32];
 490
 491                 snprintf(name, sizeof(name), "bf_I%u", size);
 492                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 493                                    size <= 32 ? 32 : size );
 494                 s_modes[size] = mode;
 495         }
 496
 497         type_dbg_info *dbgi = get_type_dbg_info_(type);
 498         res                 = new_d_type_primitive(mode, dbgi);
 499         set_primitive_base_type(res, base_tp);
 500
 501         return res;
 502 }
 503
 504 /**
 505  * Return the unsigned integer type of size bits.
 506  *
 507  * @param size   the size
 508  */
 509 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 510                                                    unsigned size,
 511                                                                                                    const type_t *type)
 512 {
 513         static ir_mode *u_modes[64 + 1] = {NULL, };
 514         ir_type *res;
 515         ir_mode *mode;
 516
 517         if (size <= 0 || size > 64)
 518                 return NULL;
 519
 520         mode = u_modes[size];
 521         if (mode == NULL) {
 522                 char name[32];
 523
 524                 snprintf(name, sizeof(name), "bf_U%u", size);
 525                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 526                                    size <= 32 ? 32 : size );
 527                 u_modes[size] = mode;
 528         }
 529
 530         type_dbg_info *dbgi = get_type_dbg_info_(type);
 531         res = new_d_type_primitive(mode, dbgi);
 532         set_primitive_base_type(res, base_tp);
 533
 534         return res;
 535 }
 536
 537 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 538 {
 539         type_t *base = skip_typeref(type->base_type);
 540         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 541         ir_type *irbase = get_ir_type(base);
 542
 543         unsigned size = type->bit_size;
 544
 545         assert(!is_type_float(base));
 546         if (is_type_signed(base)) {
 547                 return get_signed_int_type_for_bit_size(irbase, size,
 548                                                         (const type_t*) type);
 549         } else {
 550                 return get_unsigned_int_type_for_bit_size(irbase, size,
 551                                                           (const type_t*) type);
 552         }
 553 }
 554
 555 #define INVALID_TYPE ((ir_type_ptr)-1)
 556
 557 enum {
 558         COMPOUND_IS_STRUCT = false,
 559         COMPOUND_IS_UNION  = true
 560 };
 561
 562 /**
 563  * Construct firm type from ast struct type.
 564  */
 565 static ir_type *create_compound_type(compound_type_t *type,
 566                                      bool incomplete, bool is_union)
 567 {
 568         compound_t *compound = type->compound;
 569
 570         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 571                 return compound->irtype;
 572         }
 573
 574         symbol_t *symbol = compound->base.symbol;
 575         ident    *id;
 576         if (symbol != NULL) {
 577                 id = new_id_from_str(symbol->string);
 578         } else {
 579                 if (is_union) {
 580                         id = id_unique("__anonymous_union.%u");
 581                 } else {
 582                         id = id_unique("__anonymous_struct.%u");
 583                 }
 584         }
 585
 586         ir_type *irtype;
 587         if (is_union) {
 588                 irtype = new_type_union(id);
 589         } else {
 590                 irtype = new_type_struct(id);
 591         }
 592
 593         compound->irtype_complete = false;
 594         compound->irtype          = irtype;
 595
 596         if (incomplete)
 597                 return irtype;
 598
 599         if (is_union) {
 600                 layout_union_type(type);
 601         } else {
 602                 layout_struct_type(type);
 603         }
 604
 605         compound->irtype_complete = true;
 606
 607         entity_t *entry = compound->members.entities;
 608         for ( ; entry != NULL; entry = entry->base.next) {
 609                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 610                         continue;
 611
 612                 symbol_t *symbol     = entry->base.symbol;
 613                 type_t   *entry_type = entry->declaration.type;
 614                 ident    *ident;
 615                 if (symbol == NULL) {
 616                         /* anonymous bitfield member, skip */
 617                         if (entry_type->kind == TYPE_BITFIELD)
 618                                 continue;
 619                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 620                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 621                         ident = id_unique("anon.%u");
 622                 } else {
 623                         ident = new_id_from_str(symbol->string);
 624                 }
 625
 626                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 627
 628                 ir_type   *entry_irtype = get_ir_type(entry_type);
 629                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 630
 631                 set_entity_offset(entity, entry->compound_member.offset);
 632                 set_entity_offset_bits_remainder(entity,
 633                                                  entry->compound_member.bit_offset);
 634
 635                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 636                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 637                 entry->compound_member.entity = entity;
 638         }
 639
 640         set_type_alignment_bytes(irtype, compound->alignment);
 641         set_type_size_bytes(irtype, compound->size);
 642         set_type_state(irtype, layout_fixed);
 643
 644         return irtype;
 645 }
 646
 647 static ir_type *create_enum_type(enum_type_t *const type)
 648 {
 649         type->base.firm_type = ir_type_int;
 650
 651         ir_mode *const mode    = mode_int;
 652         tarval  *const one     = get_mode_one(mode);
 653         tarval  *      tv_next = get_mode_null(mode);
 654
 655         bool constant_folding_old = constant_folding;
 656         constant_folding = true;
 657
 658         enum_t   *enume = type->enume;
 659         entity_t *entry = enume->base.next;
 660         for (; entry != NULL; entry = entry->base.next) {
 661                 if (entry->kind != ENTITY_ENUM_VALUE)
 662                         break;
 663
 664                 expression_t *const init = entry->enum_value.value;
 665                 if (init != NULL) {
 666                         ir_node *const cnst = expression_to_firm(init);
 667                         if (!is_Const(cnst)) {
 668                                 panic("couldn't fold constant");
 669                         }
 670                         tv_next = get_Const_tarval(cnst);
 671                 }
 672                 entry->enum_value.tv = tv_next;
 673                 tv_next = tarval_add(tv_next, one);
 674         }
 675
 676         constant_folding = constant_folding_old;
 677
 678         return create_atomic_type(type->akind, (const type_t*) type);
 679 }
 680
 681 static ir_type *get_ir_type_incomplete(type_t *type)
 682 {
 683         assert(type != NULL);
 684         type = skip_typeref(type);
 685
 686         if (type->base.firm_type != NULL) {
 687                 assert(type->base.firm_type != INVALID_TYPE);
 688                 return type->base.firm_type;
 689         }
 690
 691         switch (type->kind) {
 692         case TYPE_COMPOUND_STRUCT:
 693                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 694         case TYPE_COMPOUND_UNION:
 695                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 696         default:
 697                 return get_ir_type(type);
 698         }
 699 }
 700
 701 ir_type *get_ir_type(type_t *type)
 702 {
 703         assert(type != NULL);
 704
 705         type = skip_typeref(type);
 706
 707         if (type->base.firm_type != NULL) {
 708                 assert(type->base.firm_type != INVALID_TYPE);
 709                 return type->base.firm_type;
 710         }
 711
 712         ir_type *firm_type = NULL;
 713         switch (type->kind) {
 714         case TYPE_ERROR:
 715                 /* Happens while constant folding, when there was an error */
 716                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 717
 718         case TYPE_ATOMIC:
 719                 firm_type = create_atomic_type(type->atomic.akind, type);
 720                 break;
 721         case TYPE_COMPLEX:
 722                 firm_type = create_complex_type(&type->complex);
 723                 break;
 724         case TYPE_IMAGINARY:
 725                 firm_type = create_imaginary_type(&type->imaginary);
 726                 break;
 727         case TYPE_FUNCTION:
 728                 firm_type = create_method_type(&type->function, false);
 729                 break;
 730         case TYPE_POINTER:
 731                 firm_type = create_pointer_type(&type->pointer);
 732                 break;
 733         case TYPE_REFERENCE:
 734                 firm_type = create_reference_type(&type->reference);
 735                 break;
 736         case TYPE_ARRAY:
 737                 firm_type = create_array_type(&type->array);
 738                 break;
 739         case TYPE_COMPOUND_STRUCT:
 740                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 741                 break;
 742         case TYPE_COMPOUND_UNION:
 743                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 744                 break;
 745         case TYPE_ENUM:
 746                 firm_type = create_enum_type(&type->enumt);
 747                 break;
 748         case TYPE_BUILTIN:
 749                 firm_type = get_ir_type(type->builtin.real_type);
 750                 break;
 751         case TYPE_BITFIELD:
 752                 firm_type = create_bitfield_type(&type->bitfield);
 753                 break;
 754
 755         case TYPE_TYPEOF:
 756         case TYPE_TYPEDEF:
 757         case TYPE_INVALID:
 758                 break;
 759         }
 760         if (firm_type == NULL)
 761                 panic("unknown type found");
 762
 763         type->base.firm_type = firm_type;
 764         return firm_type;
 765 }
 766
 767 static ir_mode *get_ir_mode_storage(type_t *type)
 768 {
 769         ir_type *irtype = get_ir_type(type);
 770
 771         /* firm doesn't report a mode for arrays somehow... */
 772         if (is_Array_type(irtype)) {
 773                 return mode_P_data;
 774         }
 775
 776         ir_mode *mode = get_type_mode(irtype);
 777         assert(mode != NULL);
 778         return mode;
 779 }
 780
 781 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 782 {
 783         ir_mode *mode = get_ir_mode_storage(type);
 784         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 785                 return mode_float_arithmetic;
 786         }
 787
 788         return mode;
 789 }
 790
 791 /** Names of the runtime functions. */
 792 static const struct {
 793         int        id;           /**< the rts id */
 794         int        n_res;        /**< number of return values */
 795         const char *name;        /**< the name of the rts function */
 796         int        n_params;     /**< number of parameters */
 797         unsigned   flags;        /**< language flags */
 798 } rts_data[] = {
 799         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 800         { rts_abort,      0, "abort",        0, _C89 },
 801         { rts_alloca,     1, "alloca",       1, _ALL },
 802         { rts_abs,        1, "abs",          1, _C89 },
 803         { rts_labs,       1, "labs",         1, _C89 },
 804         { rts_llabs,      1, "llabs",        1, _C99 },
 805         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 806
 807         { rts_fabs,       1, "fabs",         1, _C89 },
 808         { rts_sqrt,       1, "sqrt",         1, _C89 },
 809         { rts_cbrt,       1, "cbrt",         1, _C99 },
 810         { rts_exp,        1, "exp",          1, _C89 },
 811         { rts_exp2,       1, "exp2",         1, _C89 },
 812         { rts_exp10,      1, "exp10",        1, _GNUC },
 813         { rts_log,        1, "log",          1, _C89 },
 814         { rts_log2,       1, "log2",         1, _C89 },
 815         { rts_log10,      1, "log10",        1, _C89 },
 816         { rts_pow,        1, "pow",          2, _C89 },
 817         { rts_sin,        1, "sin",          1, _C89 },
 818         { rts_cos,        1, "cos",          1, _C89 },
 819         { rts_tan,        1, "tan",          1, _C89 },
 820         { rts_asin,       1, "asin",         1, _C89 },
 821         { rts_acos,       1, "acos",         1, _C89 },
 822         { rts_atan,       1, "atan",         1, _C89 },
 823         { rts_sinh,       1, "sinh",         1, _C89 },
 824         { rts_cosh,       1, "cosh",         1, _C89 },
 825         { rts_tanh,       1, "tanh",         1, _C89 },
 826
 827         { rts_fabsf,      1, "fabsf",        1, _C99 },
 828         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 829         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 830         { rts_expf,       1, "expf",         1, _C99 },
 831         { rts_exp2f,      1, "exp2f",        1, _C99 },
 832         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 833         { rts_logf,       1, "logf",         1, _C99 },
 834         { rts_log2f,      1, "log2f",        1, _C99 },
 835         { rts_log10f,     1, "log10f",       1, _C99 },
 836         { rts_powf,       1, "powf",         2, _C99 },
 837         { rts_sinf,       1, "sinf",         1, _C99 },
 838         { rts_cosf,       1, "cosf",         1, _C99 },
 839         { rts_tanf,       1, "tanf",         1, _C99 },
 840         { rts_asinf,      1, "asinf",        1, _C99 },
 841         { rts_acosf,      1, "acosf",        1, _C99 },
 842         { rts_atanf,      1, "atanf",        1, _C99 },
 843         { rts_sinhf,      1, "sinhf",        1, _C99 },
 844         { rts_coshf,      1, "coshf",        1, _C99 },
 845         { rts_tanhf,      1, "tanhf",        1, _C99 },
 846
 847         { rts_fabsl,      1, "fabsl",        1, _C99 },
 848         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 849         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 850         { rts_expl,       1, "expl",         1, _C99 },
 851         { rts_exp2l,      1, "exp2l",        1, _C99 },
 852         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 853         { rts_logl,       1, "logl",         1, _C99 },
 854         { rts_log2l,      1, "log2l",        1, _C99 },
 855         { rts_log10l,     1, "log10l",       1, _C99 },
 856         { rts_powl,       1, "powl",         2, _C99 },
 857         { rts_sinl,       1, "sinl",         1, _C99 },
 858         { rts_cosl,       1, "cosl",         1, _C99 },
 859         { rts_tanl,       1, "tanl",         1, _C99 },
 860         { rts_asinl,      1, "asinl",        1, _C99 },
 861         { rts_acosl,      1, "acosl",        1, _C99 },
 862         { rts_atanl,      1, "atanl",        1, _C99 },
 863         { rts_sinhl,      1, "sinhl",        1, _C99 },
 864         { rts_coshl,      1, "coshl",        1, _C99 },
 865         { rts_tanhl,      1, "tanhl",        1, _C99 },
 866
 867         { rts_strcmp,     1, "strcmp",       2, _C89 },
 868         { rts_strncmp,    1, "strncmp",      3, _C89 },
 869         { rts_strcpy,     1, "strcpy",       2, _C89 },
 870         { rts_strlen,     1, "strlen",       1, _C89 },
 871         { rts_memcpy,     1, "memcpy",       3, _C89 },
 872         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 873         { rts_memmove,    1, "memmove",      3, _C89 },
 874         { rts_memset,     1, "memset",       3, _C89 },
 875         { rts_memcmp,     1, "memcmp",       3, _C89 },
 876 };
 877
 878 static ident *rts_idents[lengthof(rts_data)];
 879
 880 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 881
 882 /**
 883  * Handle GNU attributes for entities
 884  *
 885  * @param ent   the entity
 886  * @param decl  the routine declaration
 887  */
 888 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 889 {
 890         assert(is_declaration(entity));
 891         decl_modifiers_t modifiers = entity->declaration.modifiers;
 892
 893         if (is_method_entity(irentity)) {
 894                 if (modifiers & DM_PURE) {
 895                         set_entity_additional_property(irentity, mtp_property_pure);
 896                 }
 897                 if (modifiers & DM_CONST) {
 898                         set_entity_additional_property(irentity, mtp_property_const);
 899                         have_const_functions = true;
 900                 }
 901         }
 902         if (modifiers & DM_USED) {
 903                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 904         }
 905         if (modifiers & DM_WEAK) {
 906                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 907         }
 908 }
 909
 910 static bool is_main(entity_t *entity)
 911 {
 912         static symbol_t *sym_main = NULL;
 913         if (sym_main == NULL) {
 914                 sym_main = symbol_table_insert("main");
 915         }
 916
 917         if (entity->base.symbol != sym_main)
 918                 return false;
 919         /* must be in outermost scope */
 920         if (entity->base.parent_scope != &current_translation_unit->scope)
 921                 return false;
 922
 923         return true;
 924 }
 925
 926 /**
 927  * Creates an entity representing a function.
 928  *
 929  * @param entity       the function declaration/definition
 930  * @param owner_type   the owner type of this function, NULL
 931  *                     for global functions
 932  */
 933 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 934 {
 935         assert(entity->kind == ENTITY_FUNCTION);
 936         if (entity->function.irentity != NULL) {
 937                 return entity->function.irentity;
 938         }
 939
 940         entity_t *original_entity = entity;
 941         if (entity->function.btk != bk_none) {
 942                 entity = get_builtin_replacement(entity);
 943                 if (entity == NULL)
 944                         return NULL;
 945         }
 946
 947         if (is_main(entity)) {
 948                 /* force main to C linkage */
 949                 type_t *type = entity->declaration.type;
 950                 assert(is_type_function(type));
 951                 if (type->function.linkage != LINKAGE_C) {
 952                         type_t *new_type           = duplicate_type(type);
 953                         new_type->function.linkage = LINKAGE_C;
 954                         type                       = identify_new_type(new_type);
 955                         entity->declaration.type   = type;
 956                 }
 957         }
 958
 959         symbol_t *symbol = entity->base.symbol;
 960         ident    *id     = new_id_from_str(symbol->string);
 961
 962         /* already an entity defined? */
 963         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 964         bool const has_body = entity->function.statement != NULL;
 965         if (irentity != NULL) {
 966                 if (get_entity_visibility(irentity) == ir_visibility_external
 967                                 && has_body) {
 968                         set_entity_visibility(irentity, ir_visibility_default);
 969                 }
 970                 goto entity_created;
 971         }
 972
 973         ir_type *ir_type_method;
 974         if (entity->function.need_closure)
 975                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 976         else
 977                 ir_type_method = get_ir_type(entity->declaration.type);
 978
 979         bool nested_function = false;
 980         if (owner_type == NULL)
 981                 owner_type = get_glob_type();
 982         else
 983                 nested_function = true;
 984
 985         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 986         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 987
 988         ident *ld_id;
 989         if (nested_function)
 990                 ld_id = id_unique("inner.%u");
 991         else
 992                 ld_id = create_ld_ident(entity);
 993         set_entity_ld_ident(irentity, ld_id);
 994
 995         handle_decl_modifiers(irentity, entity);
 996
 997         if (! nested_function) {
 998                 /* static inline             => local
 999                  * extern inline             => local
1000                  * inline without definition => local
1001                  * inline with definition    => external_visible */
1002                 storage_class_tag_t const storage_class
1003                         = (storage_class_tag_t) entity->declaration.storage_class;
1004                 bool                const is_inline     = entity->function.is_inline;
1005
1006                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1007                     set_entity_visibility(irentity, ir_visibility_default);
1008                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1009                            (is_inline && has_body)) {
1010                     set_entity_visibility(irentity, ir_visibility_local);
1011                 } else if (has_body) {
1012                     set_entity_visibility(irentity, ir_visibility_default);
1013                 } else {
1014                     set_entity_visibility(irentity, ir_visibility_external);
1015                 }
1016         } else {
1017                 /* nested functions are always local */
1018                 set_entity_visibility(irentity, ir_visibility_local);
1019         }
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                         function_type_t *function_type
1030                                 = &entity->declaration.type->function;
1031                         /* rts_entities code can't handle a "wrong" number of parameters */
1032                         if (function_type->unspecified_parameters)
1033                                 continue;
1034
1035                         /* check number of parameters */
1036                         int n_params = count_parameters(function_type);
1037                         if (n_params != rts_data[i].n_params)
1038                                 continue;
1039
1040                         type_t *return_type = skip_typeref(function_type->return_type);
1041                         int     n_res       = return_type != type_void ? 1 : 0;
1042                         if (n_res != rts_data[i].n_res)
1043                                 continue;
1044
1045                         /* ignore those rts functions not necessary needed for current mode */
1046                         if ((c_mode & rts_data[i].flags) == 0)
1047                                 continue;
1048                         assert(rts_entities[rts_data[i].id] == NULL);
1049                         rts_entities[rts_data[i].id] = irentity;
1050                 }
1051         }
1052
1053         entitymap_insert(&entitymap, symbol, irentity);
1054
1055 entity_created:
1056         original_entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1057         original_entity->function.irentity = irentity;
1058
1059         return irentity;
1060 }
1061
1062 /**
1063  * Creates a SymConst for a given entity.
1064  *
1065  * @param dbgi    debug info
1066  * @param mode    the (reference) mode for the SymConst
1067  * @param entity  the entity
1068  */
1069 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1070                                 ir_entity *entity)
1071 {
1072         assert(entity != NULL);
1073         union symconst_symbol sym;
1074         sym.entity_p = entity;
1075         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1076 }
1077
1078 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1079 {
1080         ir_mode *value_mode = get_irn_mode(value);
1081
1082         if (value_mode == dest_mode || is_Bad(value))
1083                 return value;
1084
1085         if (dest_mode == mode_b) {
1086                 ir_node *zero = new_Const(get_mode_null(value_mode));
1087                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1088                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1089                 return proj;
1090         }
1091
1092         return new_d_Conv(dbgi, value, dest_mode);
1093 }
1094
1095 /**
1096  * Creates a SymConst node representing a wide string literal.
1097  *
1098  * @param literal   the wide string literal
1099  */
1100 static ir_node *wide_string_literal_to_firm(
1101                 const string_literal_expression_t *literal)
1102 {
1103         ir_type  *const global_type = get_glob_type();
1104         ir_type  *const elem_type   = ir_type_wchar_t;
1105         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1106         ir_type  *const type        = new_type_array(1, elem_type);
1107
1108         ident     *const id     = id_unique("str.%u");
1109         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1110         set_entity_ld_ident(entity, id);
1111         set_entity_visibility(entity, ir_visibility_private);
1112         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1113
1114         ir_mode      *const mode = get_type_mode(elem_type);
1115         const size_t        slen = wstrlen(&literal->value);
1116
1117         set_array_lower_bound_int(type, 0, 0);
1118         set_array_upper_bound_int(type, 0, slen);
1119         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1120         set_type_state(type, layout_fixed);
1121
1122         ir_initializer_t *initializer = create_initializer_compound(slen);
1123         const char              *p    = literal->value.begin;
1124         for (size_t i = 0; i < slen; ++i) {
1125                 assert(p < literal->value.begin + literal->value.size);
1126                 utf32              v  = read_utf8_char(&p);
1127                 tarval           *tv  = new_tarval_from_long(v, mode);
1128                 ir_initializer_t *val = create_initializer_tarval(tv);
1129                 set_initializer_compound_value(initializer, i, val);
1130         }
1131         set_entity_initializer(entity, initializer);
1132
1133         return create_symconst(dbgi, mode_P_data, entity);
1134 }
1135
1136 /**
1137  * Creates a SymConst node representing a string constant.
1138  *
1139  * @param src_pos    the source position of the string constant
1140  * @param id_prefix  a prefix for the name of the generated string constant
1141  * @param value      the value of the string constant
1142  */
1143 static ir_node *string_to_firm(const source_position_t *const src_pos,
1144                                const char *const id_prefix,
1145                                const string_t *const value)
1146 {
1147         ir_type  *const global_type = get_glob_type();
1148         dbg_info *const dbgi        = get_dbg_info(src_pos);
1149         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1150
1151         ident     *const id     = id_unique(id_prefix);
1152         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1153         set_entity_ld_ident(entity, id);
1154         set_entity_visibility(entity, ir_visibility_private);
1155         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1156
1157         ir_type *const elem_type = ir_type_const_char;
1158         ir_mode *const mode      = get_type_mode(elem_type);
1159
1160         const char* const string = value->begin;
1161         const size_t      slen   = value->size;
1162
1163         set_array_lower_bound_int(type, 0, 0);
1164         set_array_upper_bound_int(type, 0, slen);
1165         set_type_size_bytes(type, slen);
1166         set_type_state(type, layout_fixed);
1167
1168         ir_initializer_t *initializer = create_initializer_compound(slen);
1169         for (size_t i = 0; i < slen; ++i) {
1170                 tarval           *tv  = new_tarval_from_long(string[i], mode);
1171                 ir_initializer_t *val = create_initializer_tarval(tv);
1172                 set_initializer_compound_value(initializer, i, val);
1173         }
1174         set_entity_initializer(entity, initializer);
1175
1176         return create_symconst(dbgi, mode_P_data, entity);
1177 }
1178
1179 static bool try_create_integer(literal_expression_t *literal,
1180                                type_t *type, unsigned char base)
1181 {
1182         const char *string = literal->value.begin;
1183         size_t      size   = literal->value.size;
1184
1185         assert(type->kind == TYPE_ATOMIC);
1186         atomic_type_kind_t akind = type->atomic.akind;
1187
1188         ir_mode *mode = atomic_modes[akind];
1189         tarval  *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1190         if (tv == tarval_bad)
1191                 return false;
1192
1193         literal->base.type    = type;
1194         literal->target_value = tv;
1195         return true;
1196 }
1197
1198 static void create_integer_tarval(literal_expression_t *literal)
1199 {
1200         unsigned  us     = 0;
1201         unsigned  ls     = 0;
1202         symbol_t *suffix = literal->suffix;
1203         /* parse suffix */
1204         if (suffix != NULL) {
1205                 for (const char *c = suffix->string; *c != '\0'; ++c) {
1206                         if (*c == 'u' || *c == 'U') { ++us; }
1207                         if (*c == 'l' || *c == 'L') { ++ls; }
1208                 }
1209         }
1210
1211         unsigned base;
1212         switch (literal->base.kind) {
1213                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1214                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1215                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1216                 default: panic("invalid literal kind");
1217         }
1218
1219         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1220
1221         /* now try if the constant is small enough for some types */
1222         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1223         if (ls < 1) {
1224                 if (us == 0 && try_create_integer(literal, type_int, base))
1225                         goto finished;
1226                 if ((us == 1 || base != 10)
1227                                 && try_create_integer(literal, type_unsigned_int, base))
1228                         goto finished;
1229         }
1230         if (ls < 2) {
1231                 if (us == 0 && try_create_integer(literal, type_long, base))
1232                         goto finished;
1233                 if ((us == 1 || base != 10)
1234                                 && try_create_integer(literal, type_unsigned_long, base))
1235                         goto finished;
1236         }
1237         /* last try? then we should not report tarval_bad */
1238         if (us != 1 && base == 10)
1239                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1240         if (us == 0 && try_create_integer(literal, type_long_long, base))
1241                 goto finished;
1242
1243         /* last try */
1244         assert(us == 1 || base != 10);
1245         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1247         if (!res)
1248                 panic("internal error when parsing number literal");
1249
1250 finished:
1251         tarval_set_integer_overflow_mode(old_mode);
1252 }
1253
1254 void determine_literal_type(literal_expression_t *literal)
1255 {
1256         switch (literal->base.kind) {
1257         case EXPR_LITERAL_INTEGER:
1258         case EXPR_LITERAL_INTEGER_OCTAL:
1259         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1260                 create_integer_tarval(literal);
1261                 return;
1262         default:
1263                 break;
1264         }
1265 }
1266
1267 /**
1268  * Creates a Const node representing a constant.
1269  */
1270 static ir_node *literal_to_firm(const literal_expression_t *literal)
1271 {
1272         type_t     *type   = skip_typeref(literal->base.type);
1273         ir_mode    *mode   = get_ir_mode_storage(type);
1274         const char *string = literal->value.begin;
1275         size_t      size   = literal->value.size;
1276         tarval     *tv;
1277
1278         switch (literal->base.kind) {
1279         case EXPR_LITERAL_WIDE_CHARACTER: {
1280                 utf32  v = read_utf8_char(&string);
1281                 char   buf[128];
1282                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1283
1284                 tv = new_tarval_from_str(buf, len, mode);
1285                 goto make_const;
1286         }
1287         case EXPR_LITERAL_CHARACTER: {
1288                 long long int v;
1289                 if (size == 1 && char_is_signed) {
1290                         v = (signed char)string[0];
1291                 } else {
1292                         v = 0;
1293                         for (size_t i = 0; i < size; ++i) {
1294                                 v = (v << 8) | ((unsigned char)string[i]);
1295                         }
1296                 }
1297                 char   buf[128];
1298                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1299
1300                 tv = new_tarval_from_str(buf, len, mode);
1301                 goto make_const;
1302         }
1303         case EXPR_LITERAL_INTEGER:
1304         case EXPR_LITERAL_INTEGER_OCTAL:
1305         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1306                 assert(literal->target_value != NULL);
1307                 tv = literal->target_value;
1308                 goto make_const;
1309         case EXPR_LITERAL_FLOATINGPOINT:
1310                 tv = new_tarval_from_str(string, size, mode);
1311                 goto make_const;
1312         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1313                 char buffer[size + 2];
1314                 memcpy(buffer, "0x", 2);
1315                 memcpy(buffer+2, string, size);
1316                 tv = new_tarval_from_str(buffer, size+2, mode);
1317                 goto make_const;
1318         }
1319         case EXPR_LITERAL_BOOLEAN:
1320                 if (string[0] == 't') {
1321                         tv = get_mode_one(mode);
1322                 } else {
1323                         assert(string[0] == 'f');
1324                         tv = get_mode_null(mode);
1325                 }
1326                 goto make_const;
1327         case EXPR_LITERAL_MS_NOOP:
1328                 tv = get_mode_null(mode);
1329                 goto make_const;
1330         default:
1331                 break;
1332         }
1333         panic("Invalid literal kind found");
1334
1335 make_const: ;
1336         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1337         ir_node  *res        = new_d_Const(dbgi, tv);
1338         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1339         return create_conv(dbgi, res, mode_arith);
1340 }
1341
1342 /*
1343  * Allocate an area of size bytes aligned at alignment
1344  * at a frame type.
1345  */
1346 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1347 {
1348         static unsigned area_cnt = 0;
1349         char buf[32];
1350
1351         ir_type *tp = new_type_array(1, ir_type_char);
1352         set_array_bounds_int(tp, 0, 0, size);
1353         set_type_alignment_bytes(tp, alignment);
1354
1355         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1356         ident *name = new_id_from_str(buf);
1357         ir_entity *area = new_entity(frame_type, name, tp);
1358
1359         /* mark this entity as compiler generated */
1360         set_entity_compiler_generated(area, 1);
1361         return area;
1362 }
1363
1364 /**
1365  * Return a node representing a trampoline region
1366  * for a given function entity.
1367  *
1368  * @param dbgi    debug info
1369  * @param entity  the function entity
1370  */
1371 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1372 {
1373         ir_entity *region = NULL;
1374         int        i;
1375
1376         if (current_trampolines != NULL) {
1377                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1378                         if (current_trampolines[i].function == entity) {
1379                                 region = current_trampolines[i].region;
1380                                 break;
1381                         }
1382                 }
1383         } else {
1384                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1385         }
1386         ir_graph *irg = current_ir_graph;
1387         if (region == NULL) {
1388                 /* create a new region */
1389                 ir_type           *frame_tp = get_irg_frame_type(irg);
1390                 trampoline_region  reg;
1391                 reg.function = entity;
1392
1393                 reg.region   = alloc_trampoline(frame_tp,
1394                                                 be_params->trampoline_size,
1395                                                 be_params->trampoline_align);
1396                 ARR_APP1(trampoline_region, current_trampolines, reg);
1397                 region = reg.region;
1398         }
1399         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1400                                region);
1401 }
1402
1403 /**
1404  * Creates a trampoline for a function represented by an entity.
1405  *
1406  * @param dbgi    debug info
1407  * @param mode    the (reference) mode for the function address
1408  * @param entity  the function entity
1409  */
1410 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1411                                   ir_entity *entity)
1412 {
1413         assert(entity != NULL);
1414         ir_node *in[3];
1415         in[0] = get_trampoline_region(dbgi, entity);
1416         in[1] = create_symconst(dbgi, mode, entity);
1417         in[2] = get_irg_frame(current_ir_graph);
1418
1419         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1420         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1421         return new_Proj(irn, mode, pn_Builtin_1_result);
1422 }
1423
1424 /**
1425  * Dereference an address.
1426  *
1427  * @param dbgi  debug info
1428  * @param type  the type of the dereferenced result (the points_to type)
1429  * @param addr  the address to dereference
1430  */
1431 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1432                                       ir_node *const addr)
1433 {
1434         ir_type *irtype = get_ir_type(type);
1435         if (is_compound_type(irtype)
1436                         || is_Method_type(irtype)
1437                         || is_Array_type(irtype)) {
1438                 return addr;
1439         }
1440
1441         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1442                                   ? cons_volatile : cons_none;
1443         ir_mode *const mode     = get_type_mode(irtype);
1444         ir_node *const memory   = get_store();
1445         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1446         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1447         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1448
1449         set_store(load_mem);
1450
1451         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1452         return create_conv(dbgi, load_res, mode_arithmetic);
1453 }
1454
1455 /**
1456  * Creates a strict Conv (to the node's mode) if necessary.
1457  *
1458  * @param dbgi  debug info
1459  * @param node  the node to strict conv
1460  */
1461 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1462 {
1463         ir_mode *mode = get_irn_mode(node);
1464
1465         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1466                 return node;
1467         if (!mode_is_float(mode))
1468                 return node;
1469
1470         /* check if there is already a Conv */
1471         if (is_Conv(node)) {
1472                 /* convert it into a strict Conv */
1473                 set_Conv_strict(node, 1);
1474                 return node;
1475         }
1476
1477         /* otherwise create a new one */
1478         return new_d_strictConv(dbgi, node, mode);
1479 }
1480
1481 /**
1482  * Returns the address of a global variable.
1483  *
1484  * @param dbgi      debug info
1485  * @param variable  the variable
1486  */
1487 static ir_node *get_global_var_address(dbg_info *const dbgi,
1488                                        const variable_t *const variable)
1489 {
1490         ir_entity *const irentity = variable->v.entity;
1491         if (variable->thread_local) {
1492                 ir_node *const no_mem = new_NoMem();
1493                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1494                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1495         } else {
1496                 return create_symconst(dbgi, mode_P_data, irentity);
1497         }
1498 }
1499
1500 /**
1501  * Returns the correct base address depending on whether it is a parameter or a
1502  * normal local variable.
1503  */
1504 static ir_node *get_local_frame(ir_entity *const ent)
1505 {
1506         ir_graph      *const irg   = current_ir_graph;
1507         const ir_type *const owner = get_entity_owner(ent);
1508         if (owner == current_outer_frame || owner == current_outer_value_type) {
1509                 assert(current_static_link != NULL);
1510                 return current_static_link;
1511         } else {
1512                 return get_irg_frame(irg);
1513         }
1514 }
1515
1516 /**
1517  * Keep all memory edges of the given block.
1518  */
1519 static void keep_all_memory(ir_node *block)
1520 {
1521         ir_node *old = get_cur_block();
1522
1523         set_cur_block(block);
1524         keep_alive(get_store());
1525         /* TODO: keep all memory edges from restricted pointers */
1526         set_cur_block(old);
1527 }
1528
1529 static ir_node *reference_expression_enum_value_to_firm(
1530                 const reference_expression_t *ref)
1531 {
1532         entity_t *entity = ref->entity;
1533         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1534         /* make sure the type is constructed */
1535         (void) get_ir_type(type);
1536
1537         return new_Const(entity->enum_value.tv);
1538 }
1539
1540 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1541 {
1542         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1543         entity_t *entity = ref->entity;
1544         assert(is_declaration(entity));
1545         type_t   *type   = skip_typeref(entity->declaration.type);
1546
1547         /* make sure the type is constructed */
1548         (void) get_ir_type(type);
1549
1550         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1551                 ir_entity *irentity = get_function_entity(entity, NULL);
1552                 /* for gcc compatibility we have to produce (dummy) addresses for some
1553                  * builtins which don't have entities */
1554                 if (irentity == NULL) {
1555                         if (warning.other) {
1556                                 warningf(&ref->base.source_position,
1557                                                 "taking address of builtin '%Y'",
1558                                                 ref->entity->base.symbol);
1559                         }
1560
1561                         /* simply create a NULL pointer */
1562                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1563                         ir_node  *res  = new_Const_long(mode, 0);
1564
1565                         return res;
1566                 }
1567         }
1568
1569         switch ((declaration_kind_t) entity->declaration.kind) {
1570         case DECLARATION_KIND_UNKNOWN:
1571                 break;
1572
1573         case DECLARATION_KIND_LOCAL_VARIABLE: {
1574                 ir_mode *const mode  = get_ir_mode_storage(type);
1575                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1576                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1577         }
1578         case DECLARATION_KIND_PARAMETER: {
1579                 ir_mode *const mode  = get_ir_mode_storage(type);
1580                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1581                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1582         }
1583         case DECLARATION_KIND_FUNCTION: {
1584                 ir_mode *const mode = get_ir_mode_storage(type);
1585                 return create_symconst(dbgi, mode, entity->function.irentity);
1586         }
1587         case DECLARATION_KIND_INNER_FUNCTION: {
1588                 ir_mode *const mode = get_ir_mode_storage(type);
1589                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1590                         /* inner function not using the closure */
1591                         return create_symconst(dbgi, mode, entity->function.irentity);
1592                 } else {
1593                         /* need trampoline here */
1594                         return create_trampoline(dbgi, mode, entity->function.irentity);
1595                 }
1596         }
1597         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1598                 const variable_t *variable = &entity->variable;
1599                 ir_node *const addr = get_global_var_address(dbgi, variable);
1600                 return deref_address(dbgi, variable->base.type, addr);
1601         }
1602
1603         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1604                 ir_entity *irentity = entity->variable.v.entity;
1605                 ir_node   *frame    = get_local_frame(irentity);
1606                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1607                 return deref_address(dbgi, entity->declaration.type, sel);
1608         }
1609         case DECLARATION_KIND_PARAMETER_ENTITY: {
1610                 ir_entity *irentity = entity->parameter.v.entity;
1611                 ir_node   *frame    = get_local_frame(irentity);
1612                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1613                 return deref_address(dbgi, entity->declaration.type, sel);
1614         }
1615
1616         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1617                 return entity->variable.v.vla_base;
1618
1619         case DECLARATION_KIND_COMPOUND_MEMBER:
1620                 panic("not implemented reference type");
1621         }
1622
1623         panic("reference to declaration with unknown type found");
1624 }
1625
1626 static ir_node *reference_addr(const reference_expression_t *ref)
1627 {
1628         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1629         entity_t *entity = ref->entity;
1630         assert(is_declaration(entity));
1631
1632         switch((declaration_kind_t) entity->declaration.kind) {
1633         case DECLARATION_KIND_UNKNOWN:
1634                 break;
1635         case DECLARATION_KIND_PARAMETER:
1636         case DECLARATION_KIND_LOCAL_VARIABLE:
1637                 /* you can store to a local variable (so we don't panic but return NULL
1638                  * as an indicator for no real address) */
1639                 return NULL;
1640         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1641                 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1642                 return addr;
1643         }
1644         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1645                 ir_entity *irentity = entity->variable.v.entity;
1646                 ir_node   *frame    = get_local_frame(irentity);
1647                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1648
1649                 return sel;
1650         }
1651         case DECLARATION_KIND_PARAMETER_ENTITY: {
1652                 ir_entity *irentity = entity->parameter.v.entity;
1653                 ir_node   *frame    = get_local_frame(irentity);
1654                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1655
1656                 return sel;
1657         }
1658
1659         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1660                 return entity->variable.v.vla_base;
1661
1662         case DECLARATION_KIND_FUNCTION: {
1663                 type_t  *const type = skip_typeref(entity->declaration.type);
1664                 ir_mode *const mode = get_ir_mode_storage(type);
1665                 return create_symconst(dbgi, mode, entity->function.irentity);
1666         }
1667
1668         case DECLARATION_KIND_INNER_FUNCTION: {
1669                 type_t  *const type = skip_typeref(entity->declaration.type);
1670                 ir_mode *const mode = get_ir_mode_storage(type);
1671                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1672                         /* inner function not using the closure */
1673                         return create_symconst(dbgi, mode, entity->function.irentity);
1674                 } else {
1675                         /* need trampoline here */
1676                         return create_trampoline(dbgi, mode, entity->function.irentity);
1677                 }
1678         }
1679
1680         case DECLARATION_KIND_COMPOUND_MEMBER:
1681                 panic("not implemented reference type");
1682         }
1683
1684         panic("reference to declaration with unknown type found");
1685 }
1686
1687 /**
1688  * Generate an unary builtin.
1689  *
1690  * @param kind           the builtin kind to generate
1691  * @param op             the operand
1692  * @param function_type  the function type for the GNU builtin routine
1693  * @param db             debug info
1694  */
1695 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1696 {
1697         ir_node *in[1];
1698         in[0] = expression_to_firm(op);
1699
1700         ir_type *tp  = get_ir_type(function_type);
1701         ir_type *res = get_method_res_type(tp, 0);
1702         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1703         set_irn_pinned(irn, op_pin_state_floats);
1704         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1705 }
1706
1707 /**
1708  * Generate a pinned unary builtin.
1709  *
1710  * @param kind           the builtin kind to generate
1711  * @param op             the operand
1712  * @param function_type  the function type for the GNU builtin routine
1713  * @param db             debug info
1714  */
1715 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op,
1716                                          type_t *function_type, dbg_info *db)
1717 {
1718         ir_node *in[1];
1719         in[0] = expression_to_firm(op);
1720
1721         ir_type *tp  = get_ir_type(function_type);
1722         ir_type *res = get_method_res_type(tp, 0);
1723         ir_node *mem = get_store();
1724         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1725         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1726         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1727 }
1728
1729 /**
1730  * Generate an binary-void-return builtin.
1731  *
1732  * @param kind           the builtin kind to generate
1733  * @param op1            the first operand
1734  * @param op2            the second operand
1735  * @param function_type  the function type for the GNU builtin routine
1736  * @param db             debug info
1737  */
1738 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1,
1739                                        expression_t *op2, type_t *function_type,
1740                                                                            dbg_info *db)
1741 {
1742         ir_node *in[2];
1743         in[0] = expression_to_firm(op1);
1744         in[1] = expression_to_firm(op2);
1745
1746         ir_type *tp  = get_ir_type(function_type);
1747         ir_node *mem = get_store();
1748         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1749         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1750         return NULL;
1751 }
1752
1753 /**
1754  * Transform calls to builtin functions.
1755  */
1756 static ir_node *process_builtin_call(const call_expression_t *call)
1757 {
1758         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1759
1760         assert(call->function->kind == EXPR_REFERENCE);
1761         reference_expression_t *builtin = &call->function->reference;
1762
1763         type_t *type = skip_typeref(builtin->base.type);
1764         assert(is_type_pointer(type));
1765
1766         type_t *function_type = skip_typeref(type->pointer.points_to);
1767
1768         switch (builtin->entity->function.btk) {
1769         case bk_gnu_builtin_alloca: {
1770                 if (call->arguments == NULL || call->arguments->next != NULL) {
1771                         panic("invalid number of parameters on __builtin_alloca");
1772                 }
1773                 expression_t *argument = call->arguments->expression;
1774                 ir_node      *size     = expression_to_firm(argument);
1775
1776                 ir_node *store  = get_store();
1777                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1778                                               stack_alloc);
1779                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1780                 set_store(proj_m);
1781                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1782
1783                 return res;
1784         }
1785
1786         case bk_gnu_builtin_huge_val:
1787         case bk_gnu_builtin_huge_valf:
1788         case bk_gnu_builtin_huge_vall:
1789         case bk_gnu_builtin_inf:
1790         case bk_gnu_builtin_inff:
1791         case bk_gnu_builtin_infl: {
1792                 type_t  *type = function_type->function.return_type;
1793                 ir_mode *mode = get_ir_mode_arithmetic(type);
1794                 tarval  *tv   = get_mode_infinite(mode);
1795                 ir_node *res  = new_d_Const(dbgi, tv);
1796                 return   res;
1797         }
1798         case bk_gnu_builtin_nan:
1799         case bk_gnu_builtin_nanf:
1800         case bk_gnu_builtin_nanl: {
1801                 /* Ignore string for now... */
1802                 assert(is_type_function(function_type));
1803                 type_t  *type = function_type->function.return_type;
1804                 ir_mode *mode = get_ir_mode_arithmetic(type);
1805                 tarval  *tv   = get_mode_NAN(mode);
1806                 ir_node *res  = new_d_Const(dbgi, tv);
1807                 return res;
1808         }
1809         case bk_gnu_builtin_expect: {
1810                 expression_t *argument = call->arguments->expression;
1811                 return _expression_to_firm(argument);
1812         }
1813         case bk_gnu_builtin_va_end:
1814                 /* evaluate the argument of va_end for its side effects */
1815                 _expression_to_firm(call->arguments->expression);
1816                 return NULL;
1817         case bk_gnu_builtin_frame_address: {
1818                 expression_t *const expression = call->arguments->expression;
1819                 bool val = fold_constant_to_bool(expression);
1820                 if (!val) {
1821                         /* the nice case */
1822                         return get_irg_frame(current_ir_graph);
1823                 } else {
1824                         /* get the argument */
1825                         ir_node *in[2];
1826
1827                         in[0] = expression_to_firm(expression);
1828                         in[1] = get_irg_frame(current_ir_graph);
1829                         ir_type *tp  = get_ir_type(function_type);
1830                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1831                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1832                 }
1833         }
1834         case bk_gnu_builtin_return_address: {
1835                 expression_t *const expression = call->arguments->expression;
1836                 ir_node *in[2];
1837
1838                 in[0] = expression_to_firm(expression);
1839                 in[1] = get_irg_frame(current_ir_graph);
1840                 ir_type *tp  = get_ir_type(function_type);
1841                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1842                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1843         }
1844         case bk_gnu_builtin_ffs:
1845                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1846         case bk_gnu_builtin_clz:
1847                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1848         case bk_gnu_builtin_ctz:
1849                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1850         case bk_gnu_builtin_popcount:
1851         case bk_ms__popcount:
1852                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1853         case bk_gnu_builtin_parity:
1854                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1855         case bk_gnu_builtin_prefetch: {
1856                 call_argument_t *const args = call->arguments;
1857                 expression_t *const addr    = args->expression;
1858                 ir_node *in[3];
1859
1860                 in[0] = _expression_to_firm(addr);
1861                 if (args->next != NULL) {
1862                         expression_t *const rw = args->next->expression;
1863
1864                         in[1] = _expression_to_firm(rw);
1865
1866                         if (args->next->next != NULL) {
1867                                 expression_t *const locality = args->next->next->expression;
1868
1869                                 in[2] = expression_to_firm(locality);
1870                         } else {
1871                                 in[2] = new_Const_long(mode_int, 3);
1872                         }
1873                 } else {
1874                         in[1] = new_Const_long(mode_int, 0);
1875                         in[2] = new_Const_long(mode_int, 3);
1876                 }
1877                 ir_type *tp  = get_ir_type(function_type);
1878                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1879                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1880                 return NULL;
1881         }
1882         case bk_gnu_builtin_trap:
1883         case bk_ms__ud2:
1884         {
1885                 ir_type *tp  = get_ir_type(function_type);
1886                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1887                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1888                 return NULL;
1889         }
1890         case bk_ms__debugbreak: {
1891                 ir_type *tp  = get_ir_type(function_type);
1892                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1893                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1894                 return NULL;
1895         }
1896         case bk_ms_ReturnAddress: {
1897                 ir_node *in[2];
1898
1899                 in[0] = new_Const_long(mode_int, 0);
1900                 in[1] = get_irg_frame(current_ir_graph);
1901                 ir_type *tp  = get_ir_type(function_type);
1902                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1903                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1904         }
1905         case bk_ms_rotl:
1906         case bk_ms_rotl64: {
1907                 ir_node *val  = expression_to_firm(call->arguments->expression);
1908                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1909                 ir_mode *mode = get_irn_mode(val);
1910                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1911         }
1912         case bk_ms_rotr:
1913         case bk_ms_rotr64: {
1914                 ir_node *val  = expression_to_firm(call->arguments->expression);
1915                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1916                 ir_mode *mode = get_irn_mode(val);
1917                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1918                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1919                 return new_d_Rotl(dbgi, val, sub, mode);
1920         }
1921         case bk_ms_byteswap_ushort:
1922         case bk_ms_byteswap_ulong:
1923         case bk_ms_byteswap_uint64:
1924                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1925         case bk_ms__inbyte:
1926         case bk_ms__inword:
1927         case bk_ms__indword:
1928                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1929         case bk_ms__outbyte:
1930         case bk_ms__outword:
1931         case bk_ms__outdword:
1932                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1933                         call->arguments->next->expression, function_type, dbgi);
1934         default:
1935                 panic("unsupported builtin found");
1936         }
1937 }
1938
1939 /**
1940  * Transform a call expression.
1941  * Handles some special cases, like alloca() calls, which must be resolved
1942  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1943  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1944  * handled right...
1945  */
1946 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1947 {
1948         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1949         assert(get_cur_block() != NULL);
1950
1951         expression_t *function = call->function;
1952         if (function->kind == EXPR_REFERENCE) {
1953                 const reference_expression_t *ref    = &function->reference;
1954                 entity_t                     *entity = ref->entity;
1955
1956                 if (entity->kind == ENTITY_FUNCTION) {
1957                         ir_entity *irentity = entity->function.irentity;
1958                         if (irentity == NULL)
1959                                 irentity = get_function_entity(entity, NULL);
1960
1961                         if (irentity == NULL && entity->function.btk != bk_none) {
1962                                 return process_builtin_call(call);
1963                         }
1964
1965 #if 0
1966                         if (irentity == rts_entities[rts_alloca]) {
1967                                 /* handle alloca() call */
1968                                 expression_t *argument = call->arguments->expression;
1969                                 ir_node      *size     = expression_to_firm(argument);
1970                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1971
1972                                 size = create_conv(dbgi, size, mode);
1973
1974                                 ir_node  *store  = get_store();
1975                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1976                                                                firm_unknown_type, stack_alloc);
1977                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1978                                 set_store(proj_m);
1979                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1980
1981                                 return res;
1982                         }
1983 #endif
1984                 }
1985         }
1986         ir_node *callee = expression_to_firm(function);
1987
1988         type_t *type = skip_typeref(function->base.type);
1989         assert(is_type_pointer(type));
1990         pointer_type_t *pointer_type = &type->pointer;
1991         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1992         assert(is_type_function(points_to));
1993         function_type_t *function_type = &points_to->function;
1994
1995         int      n_parameters = 0;
1996         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1997         ir_type *new_method_type = NULL;
1998         if (function_type->variadic || function_type->unspecified_parameters) {
1999                 const call_argument_t *argument = call->arguments;
2000                 for ( ; argument != NULL; argument = argument->next) {
2001                         ++n_parameters;
2002                 }
2003
2004                 /* we need to construct a new method type matching the call
2005                  * arguments... */
2006                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
2007                 int n_res       = get_method_n_ress(ir_method_type);
2008                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
2009                 set_method_calling_convention(new_method_type,
2010                                get_method_calling_convention(ir_method_type));
2011                 set_method_additional_properties(new_method_type,
2012                                get_method_additional_properties(ir_method_type));
2013                 set_method_variadicity(new_method_type,
2014                                        get_method_variadicity(ir_method_type));
2015
2016                 for (int i = 0; i < n_res; ++i) {
2017                         set_method_res_type(new_method_type, i,
2018                                             get_method_res_type(ir_method_type, i));
2019                 }
2020                 argument = call->arguments;
2021                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
2022                         expression_t *expression = argument->expression;
2023                         ir_type      *irtype     = get_ir_type(expression->base.type);
2024                         set_method_param_type(new_method_type, i, irtype);
2025                 }
2026                 ir_method_type = new_method_type;
2027         } else {
2028                 n_parameters = get_method_n_params(ir_method_type);
2029         }
2030
2031         ir_node *in[n_parameters];
2032
2033         const call_argument_t *argument = call->arguments;
2034         for (int n = 0; n < n_parameters; ++n) {
2035                 expression_t *expression = argument->expression;
2036                 ir_node      *arg_node   = expression_to_firm(expression);
2037
2038                 type_t  *type = skip_typeref(expression->base.type);
2039                 if (!is_type_compound(type)) {
2040                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
2041                         arg_node      = create_conv(dbgi, arg_node, mode);
2042                         arg_node      = do_strict_conv(dbgi, arg_node);
2043                 }
2044
2045                 in[n] = arg_node;
2046
2047                 argument = argument->next;
2048         }
2049
2050         ir_node  *store = get_store();
2051         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
2052                                      ir_method_type);
2053         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M);
2054         set_store(mem);
2055
2056         type_t  *return_type = skip_typeref(function_type->return_type);
2057         ir_node *result      = NULL;
2058
2059         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2060                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
2061
2062                 if (is_type_scalar(return_type)) {
2063                         ir_mode *mode       = get_ir_mode_storage(return_type);
2064                         result              = new_d_Proj(dbgi, resproj, mode, 0);
2065                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
2066                         result              = create_conv(NULL, result, mode_arith);
2067                 } else {
2068                         ir_mode *mode = mode_P_data;
2069                         result        = new_d_Proj(dbgi, resproj, mode, 0);
2070                 }
2071         }
2072
2073         if (function->kind == EXPR_REFERENCE &&
2074             function->reference.entity->declaration.modifiers & DM_NORETURN) {
2075                 /* A dead end:  Keep the Call and the Block.  Also place all further
2076                  * nodes into a new and unreachable block. */
2077                 keep_alive(node);
2078                 keep_alive(get_cur_block());
2079                 ir_node *block = new_Block(0, NULL);
2080                 set_cur_block(block);
2081         }
2082
2083         return result;
2084 }
2085
2086 static void statement_to_firm(statement_t *statement);
2087 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
2088
2089 static ir_node *expression_to_addr(const expression_t *expression);
2090 static ir_node *create_condition_evaluation(const expression_t *expression,
2091                                             ir_node *true_block,
2092                                             ir_node *false_block);
2093
2094 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
2095                          ir_node *value)
2096 {
2097         if (!is_type_compound(type)) {
2098                 ir_mode *mode = get_ir_mode_storage(type);
2099                 value         = create_conv(dbgi, value, mode);
2100                 value         = do_strict_conv(dbgi, value);
2101         }
2102
2103         ir_node *memory = get_store();
2104
2105         if (is_type_scalar(type)) {
2106                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2107                                       ? cons_volatile : cons_none;
2108                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2109                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2110                 set_store(store_mem);
2111         } else {
2112                 ir_type *irtype    = get_ir_type(type);
2113                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2114                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
2115                 set_store(copyb_mem);
2116         }
2117 }
2118
2119 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2120 {
2121         tarval *all_one   = get_mode_all_one(mode);
2122         int     mode_size = get_mode_size_bits(mode);
2123
2124         assert(offset >= 0);
2125         assert(size   >= 0);
2126         assert(offset + size <= mode_size);
2127         if (size == mode_size) {
2128                 return all_one;
2129         }
2130
2131         long    shiftr    = get_mode_size_bits(mode) - size;
2132         long    shiftl    = offset;
2133         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2134         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2135         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2136         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2137
2138         return mask1;
2139 }
2140
2141 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2142                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2143 {
2144         ir_type *entity_type = get_entity_type(entity);
2145         ir_type *base_type   = get_primitive_base_type(entity_type);
2146         assert(base_type != NULL);
2147         ir_mode *mode        = get_type_mode(base_type);
2148
2149         value = create_conv(dbgi, value, mode);
2150
2151         /* kill upper bits of value and shift to right position */
2152         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2153         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2154
2155         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
2156         ir_node *mask_node       = new_d_Const(dbgi, mask);
2157         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2158         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2159         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
2160         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2161
2162         /* load current value */
2163         ir_node  *mem             = get_store();
2164         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
2165                                         set_volatile ? cons_volatile : cons_none);
2166         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2167         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2168         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2169         tarval   *inv_mask        = tarval_not(shift_mask);
2170         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2171         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2172
2173         /* construct new value and store */
2174         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2175         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2176                                          set_volatile ? cons_volatile : cons_none);
2177         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2178         set_store(store_mem);
2179
2180         return value_masked;
2181 }
2182
2183 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2184                 ir_node *addr)
2185 {
2186         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2187         type_t   *type     = expression->base.type;
2188         ir_mode  *mode     = get_ir_mode_storage(type);
2189         ir_node  *mem      = get_store();
2190         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2191         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2192         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2193
2194         load_res           = create_conv(dbgi, load_res, mode_int);
2195
2196         set_store(load_mem);
2197
2198         /* kill upper bits */
2199         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2200         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2201         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2202         ir_type   *entity_type  = get_entity_type(entity);
2203         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2204         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2205         assert(shift_bitsl >= 0);
2206         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2207         ir_node   *countl       = new_d_Const(dbgi, tvl);
2208         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2209
2210         long       shift_bitsr  = bitoffset + shift_bitsl;
2211         assert(shift_bitsr <= (long) machine_size);
2212         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2213         ir_node   *countr       = new_d_Const(dbgi, tvr);
2214         ir_node   *shiftr;
2215         if (mode_is_signed(mode)) {
2216                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2217         } else {
2218                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2219         }
2220
2221         return create_conv(dbgi, shiftr, mode);
2222 }
2223
2224 /* make sure the selected compound type is constructed */
2225 static void construct_select_compound(const select_expression_t *expression)
2226 {
2227         type_t *type = skip_typeref(expression->compound->base.type);
2228         if (is_type_pointer(type)) {
2229                 type = type->pointer.points_to;
2230         }
2231         (void) get_ir_type(type);
2232 }
2233
2234 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2235                                               ir_node *value, ir_node *addr)
2236 {
2237         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2238         type_t   *type = skip_typeref(expression->base.type);
2239
2240         if (!is_type_compound(type)) {
2241                 ir_mode  *mode = get_ir_mode_storage(type);
2242                 value          = create_conv(dbgi, value, mode);
2243                 value          = do_strict_conv(dbgi, value);
2244         }
2245
2246         if (expression->kind == EXPR_REFERENCE) {
2247                 const reference_expression_t *ref = &expression->reference;
2248
2249                 entity_t *entity = ref->entity;
2250                 assert(is_declaration(entity));
2251                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2252                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2253                         set_value(entity->variable.v.value_number, value);
2254                         return value;
2255                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2256                         set_value(entity->parameter.v.value_number, value);
2257                         return value;
2258                 }
2259         }
2260
2261         if (addr == NULL)
2262                 addr = expression_to_addr(expression);
2263         assert(addr != NULL);
2264
2265         if (expression->kind == EXPR_SELECT) {
2266                 const select_expression_t *select = &expression->select;
2267
2268                 construct_select_compound(select);
2269
2270                 entity_t *entity = select->compound_entry;
2271                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2272                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2273                         ir_entity *irentity = entity->compound_member.entity;
2274                         bool       set_volatile
2275                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2276                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2277                                                        set_volatile);
2278                         return value;
2279                 }
2280         }
2281
2282         assign_value(dbgi, addr, type, value);
2283         return value;
2284 }
2285
2286 static void set_value_for_expression(const expression_t *expression,
2287                                      ir_node *value)
2288 {
2289         set_value_for_expression_addr(expression, value, NULL);
2290 }
2291
2292 static ir_node *get_value_from_lvalue(const expression_t *expression,
2293                                       ir_node *addr)
2294 {
2295         if (expression->kind == EXPR_REFERENCE) {
2296                 const reference_expression_t *ref = &expression->reference;
2297
2298                 entity_t *entity = ref->entity;
2299                 assert(entity->kind == ENTITY_VARIABLE
2300                                 || entity->kind == ENTITY_PARAMETER);
2301                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2302                 int value_number;
2303                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2304                         value_number = entity->variable.v.value_number;
2305                         assert(addr == NULL);
2306                         type_t  *type = skip_typeref(expression->base.type);
2307                         ir_mode *mode = get_ir_mode_storage(type);
2308                         ir_node *res  = get_value(value_number, mode);
2309                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2310                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2311                         value_number = entity->parameter.v.value_number;
2312                         assert(addr == NULL);
2313                         type_t  *type = skip_typeref(expression->base.type);
2314                         ir_mode *mode = get_ir_mode_storage(type);
2315                         ir_node *res  = get_value(value_number, mode);
2316                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2317                 }
2318         }
2319
2320         assert(addr != NULL);
2321         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2322
2323         ir_node *value;
2324         if (expression->kind == EXPR_SELECT &&
2325             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2326             construct_select_compound(&expression->select);
2327                 value = bitfield_extract_to_firm(&expression->select, addr);
2328         } else {
2329                 value = deref_address(dbgi, expression->base.type, addr);
2330         }
2331
2332         return value;
2333 }
2334
2335
2336 static ir_node *create_incdec(const unary_expression_t *expression)
2337 {
2338         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2339         const expression_t *value_expr = expression->value;
2340         ir_node            *addr       = expression_to_addr(value_expr);
2341         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2342
2343         type_t  *type = skip_typeref(expression->base.type);
2344         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2345
2346         ir_node *offset;
2347         if (is_type_pointer(type)) {
2348                 pointer_type_t *pointer_type = &type->pointer;
2349                 offset = get_type_size_node(pointer_type->points_to);
2350         } else {
2351                 assert(is_type_arithmetic(type));
2352                 offset = new_Const(get_mode_one(mode));
2353         }
2354
2355         ir_node *result;
2356         ir_node *store_value;
2357         switch(expression->base.kind) {
2358         case EXPR_UNARY_POSTFIX_INCREMENT:
2359                 result      = value;
2360                 store_value = new_d_Add(dbgi, value, offset, mode);
2361                 break;
2362         case EXPR_UNARY_POSTFIX_DECREMENT:
2363                 result      = value;
2364                 store_value = new_d_Sub(dbgi, value, offset, mode);
2365                 break;
2366         case EXPR_UNARY_PREFIX_INCREMENT:
2367                 result      = new_d_Add(dbgi, value, offset, mode);
2368                 store_value = result;
2369                 break;
2370         case EXPR_UNARY_PREFIX_DECREMENT:
2371                 result      = new_d_Sub(dbgi, value, offset, mode);
2372                 store_value = result;
2373                 break;
2374         default:
2375                 panic("no incdec expr in create_incdec");
2376         }
2377
2378         set_value_for_expression_addr(value_expr, store_value, addr);
2379
2380         return result;
2381 }
2382
2383 static bool is_local_variable(expression_t *expression)
2384 {
2385         if (expression->kind != EXPR_REFERENCE)
2386                 return false;
2387         reference_expression_t *ref_expr = &expression->reference;
2388         entity_t               *entity   = ref_expr->entity;
2389         if (entity->kind != ENTITY_VARIABLE)
2390                 return false;
2391         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2392         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2393 }
2394
2395 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2396 {
2397         switch(kind) {
2398         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2399         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2400         case EXPR_BINARY_NOTEQUAL:
2401                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2402         case EXPR_BINARY_ISLESS:
2403         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2404         case EXPR_BINARY_ISLESSEQUAL:
2405         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2406         case EXPR_BINARY_ISGREATER:
2407         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2408         case EXPR_BINARY_ISGREATEREQUAL:
2409         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2410         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2411
2412         default:
2413                 break;
2414         }
2415         panic("trying to get pn_Cmp from non-comparison binexpr type");
2416 }
2417
2418 /**
2419  * Handle the assume optimizer hint: check if a Confirm
2420  * node can be created.
2421  *
2422  * @param dbi    debug info
2423  * @param expr   the IL assume expression
2424  *
2425  * we support here only some simple cases:
2426  *  - var rel const
2427  *  - const rel val
2428  *  - var rel var
2429  */
2430 static ir_node *handle_assume_compare(dbg_info *dbi,
2431                                       const binary_expression_t *expression)
2432 {
2433         expression_t *op1 = expression->left;
2434         expression_t *op2 = expression->right;
2435         entity_t     *var2, *var = NULL;
2436         ir_node      *res = NULL;
2437         pn_Cmp        cmp_val;
2438
2439         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2440
2441         if (is_local_variable(op1) && is_local_variable(op2)) {
2442         var  = op1->reference.entity;
2443             var2 = op2->reference.entity;
2444
2445                 type_t  *const type = skip_typeref(var->declaration.type);
2446                 ir_mode *const mode = get_ir_mode_storage(type);
2447
2448                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2449                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2450
2451                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2452                 set_value(var2->variable.v.value_number, res);
2453
2454                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2455                 set_value(var->variable.v.value_number, res);
2456
2457                 return res;
2458         }
2459
2460         expression_t *con;
2461         if (is_local_variable(op1) && is_constant_expression(op2)) {
2462                 var = op1->reference.entity;
2463                 con = op2;
2464         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2465                 cmp_val = get_inversed_pnc(cmp_val);
2466                 var = op2->reference.entity;
2467                 con = op1;
2468         }
2469
2470         if (var != NULL) {
2471                 type_t  *const type = skip_typeref(var->declaration.type);
2472                 ir_mode *const mode = get_ir_mode_storage(type);
2473
2474                 res = get_value(var->variable.v.value_number, mode);
2475                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2476                 set_value(var->variable.v.value_number, res);
2477         }
2478         return res;
2479 }
2480
2481 /**
2482  * Handle the assume optimizer hint.
2483  *
2484  * @param dbi    debug info
2485  * @param expr   the IL assume expression
2486  */
2487 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2488 {
2489         switch(expression->kind) {
2490         case EXPR_BINARY_EQUAL:
2491         case EXPR_BINARY_NOTEQUAL:
2492         case EXPR_BINARY_LESS:
2493         case EXPR_BINARY_LESSEQUAL:
2494         case EXPR_BINARY_GREATER:
2495         case EXPR_BINARY_GREATEREQUAL:
2496                 return handle_assume_compare(dbi, &expression->binary);
2497         default:
2498                 return NULL;
2499         }
2500 }
2501
2502 static ir_node *create_cast(dbg_info *dbgi,     ir_node *value_node,
2503                             type_t *from_type, type_t *type)
2504 {
2505         type = skip_typeref(type);
2506         if (!is_type_scalar(type)) {
2507                 /* make sure firm type is constructed */
2508                 (void) get_ir_type(type);
2509                 return value_node;
2510         }
2511
2512         from_type     = skip_typeref(from_type);
2513         ir_mode *mode = get_ir_mode_storage(type);
2514         /* check for conversion from / to __based types */
2515         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2516                 const variable_t *from_var = from_type->pointer.base_variable;
2517                 const variable_t *to_var   = type->pointer.base_variable;
2518                 if (from_var != to_var) {
2519                         if (from_var != NULL) {
2520                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2521                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2522                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2523                         }
2524                         if (to_var != NULL) {
2525                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2526                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2527                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2528                         }
2529                 }
2530         }
2531
2532         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2533                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2534                  * convert to mode_b so we only get a 0/1 value */
2535                 value_node = create_conv(dbgi, value_node, mode_b);
2536         }
2537
2538         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2539         ir_node *node       = create_conv(dbgi, value_node, mode);
2540         node                = do_strict_conv(dbgi, node);
2541         node                = create_conv(dbgi, node, mode_arith);
2542
2543         return node;
2544 }
2545
2546 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2547 {
2548         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2549         type_t   *type = skip_typeref(expression->base.type);
2550
2551         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2552                 return expression_to_addr(expression->value);
2553
2554         const expression_t *value = expression->value;
2555
2556         switch(expression->base.kind) {
2557         case EXPR_UNARY_NEGATE: {
2558                 ir_node *value_node = expression_to_firm(value);
2559                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2560                 return new_d_Minus(dbgi, value_node, mode);
2561         }
2562         case EXPR_UNARY_PLUS:
2563                 return expression_to_firm(value);
2564         case EXPR_UNARY_BITWISE_NEGATE: {
2565                 ir_node *value_node = expression_to_firm(value);
2566                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2567                 return new_d_Not(dbgi, value_node, mode);
2568         }
2569         case EXPR_UNARY_NOT: {
2570                 ir_node *value_node = _expression_to_firm(value);
2571                 value_node          = create_conv(dbgi, value_node, mode_b);
2572                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2573                 return res;
2574         }
2575         case EXPR_UNARY_DEREFERENCE: {
2576                 ir_node *value_node = expression_to_firm(value);
2577                 type_t  *value_type = skip_typeref(value->base.type);
2578                 assert(is_type_pointer(value_type));
2579
2580                 /* check for __based */
2581                 const variable_t *const base_var = value_type->pointer.base_variable;
2582                 if (base_var != NULL) {
2583                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2584                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2585                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2586                 }
2587                 type_t  *points_to  = value_type->pointer.points_to;
2588                 return deref_address(dbgi, points_to, value_node);
2589         }
2590         case EXPR_UNARY_POSTFIX_INCREMENT:
2591         case EXPR_UNARY_POSTFIX_DECREMENT:
2592         case EXPR_UNARY_PREFIX_INCREMENT:
2593         case EXPR_UNARY_PREFIX_DECREMENT:
2594                 return create_incdec(expression);
2595         case EXPR_UNARY_CAST_IMPLICIT:
2596         case EXPR_UNARY_CAST: {
2597                 ir_node *value_node = expression_to_firm(value);
2598                 type_t  *from_type  = value->base.type;
2599                 return create_cast(dbgi, value_node, from_type, type);
2600         }
2601         case EXPR_UNARY_ASSUME:
2602                 if (firm_opt.confirm)
2603                         return handle_assume(dbgi, value);
2604                 else
2605                         return NULL;
2606
2607         default:
2608                 break;
2609         }
2610         panic("invalid UNEXPR type found");
2611 }
2612
2613 /**
2614  * produces a 0/1 depending of the value of a mode_b node
2615  */
2616 static ir_node *produce_condition_result(const expression_t *expression,
2617                                          ir_mode *mode, dbg_info *dbgi)
2618 {
2619         ir_node *cur_block = get_cur_block();
2620
2621         ir_node *one_block = new_immBlock();
2622         set_cur_block(one_block);
2623         ir_node *one       = new_Const(get_mode_one(mode));
2624         ir_node *jmp_one   = new_d_Jmp(dbgi);
2625
2626         ir_node *zero_block = new_immBlock();
2627         set_cur_block(zero_block);
2628         ir_node *zero       = new_Const(get_mode_null(mode));
2629         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2630
2631         set_cur_block(cur_block);
2632         create_condition_evaluation(expression, one_block, zero_block);
2633         mature_immBlock(one_block);
2634         mature_immBlock(zero_block);
2635
2636         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2637         ir_node *block = new_Block(2, in_cf);
2638         set_cur_block(block);
2639
2640         ir_node *in[2] = { one, zero };
2641         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2642
2643         return val;
2644 }
2645
2646 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2647                 ir_node *value, type_t *type)
2648 {
2649         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2650         assert(is_type_pointer(type));
2651         pointer_type_t *const pointer_type = &type->pointer;
2652         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2653         ir_node        *      elem_size    = get_type_size_node(points_to);
2654         elem_size                          = create_conv(dbgi, elem_size, mode);
2655         value                              = create_conv(dbgi, value,     mode);
2656         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2657         return mul;
2658 }
2659
2660 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2661                           ir_node *left, ir_node *right)
2662 {
2663         ir_mode  *mode;
2664         type_t   *type_left  = skip_typeref(expression->left->base.type);
2665         type_t   *type_right = skip_typeref(expression->right->base.type);
2666
2667         expression_kind_t kind = expression->base.kind;
2668
2669         switch (kind) {
2670         case EXPR_BINARY_SHIFTLEFT:
2671         case EXPR_BINARY_SHIFTRIGHT:
2672         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2673         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2674                 mode  = get_irn_mode(left);
2675                 right = create_conv(dbgi, right, mode_uint);
2676                 break;
2677
2678         case EXPR_BINARY_SUB:
2679                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2680                         const pointer_type_t *const ptr_type = &type_left->pointer;
2681
2682                         mode = get_ir_mode_arithmetic(expression->base.type);
2683                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2684                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2685                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2686                         ir_node *const no_mem    = new_NoMem();
2687                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2688                                                                                                    mode, op_pin_state_floats);
2689                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2690                 }
2691                 /* fallthrough */
2692         case EXPR_BINARY_SUB_ASSIGN:
2693                 if (is_type_pointer(type_left)) {
2694                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2695                         mode  = get_ir_mode_arithmetic(type_left);
2696                         break;
2697                 }
2698                 goto normal_node;
2699
2700         case EXPR_BINARY_ADD:
2701         case EXPR_BINARY_ADD_ASSIGN:
2702                 if (is_type_pointer(type_left)) {
2703                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2704                         mode  = get_ir_mode_arithmetic(type_left);
2705                         break;
2706                 } else if (is_type_pointer(type_right)) {
2707                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2708                         mode  = get_ir_mode_arithmetic(type_right);
2709                         break;
2710                 }
2711                 goto normal_node;
2712
2713         default:
2714 normal_node:
2715                 mode = get_ir_mode_arithmetic(type_right);
2716                 left = create_conv(dbgi, left, mode);
2717                 break;
2718         }
2719
2720         switch (kind) {
2721         case EXPR_BINARY_ADD_ASSIGN:
2722         case EXPR_BINARY_ADD:
2723                 return new_d_Add(dbgi, left, right, mode);
2724         case EXPR_BINARY_SUB_ASSIGN:
2725         case EXPR_BINARY_SUB:
2726                 return new_d_Sub(dbgi, left, right, mode);
2727         case EXPR_BINARY_MUL_ASSIGN:
2728         case EXPR_BINARY_MUL:
2729                 return new_d_Mul(dbgi, left, right, mode);
2730         case EXPR_BINARY_BITWISE_AND:
2731         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2732                 return new_d_And(dbgi, left, right, mode);
2733         case EXPR_BINARY_BITWISE_OR:
2734         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2735                 return new_d_Or(dbgi, left, right, mode);
2736         case EXPR_BINARY_BITWISE_XOR:
2737         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2738                 return new_d_Eor(dbgi, left, right, mode);
2739         case EXPR_BINARY_SHIFTLEFT:
2740         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2741                 return new_d_Shl(dbgi, left, right, mode);
2742         case EXPR_BINARY_SHIFTRIGHT:
2743         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2744                 if (mode_is_signed(mode)) {
2745                         return new_d_Shrs(dbgi, left, right, mode);
2746                 } else {
2747                         return new_d_Shr(dbgi, left, right, mode);
2748                 }
2749         case EXPR_BINARY_DIV:
2750         case EXPR_BINARY_DIV_ASSIGN: {
2751                 ir_node *pin = new_Pin(new_NoMem());
2752                 ir_node *op;
2753                 ir_node *res;
2754                 if (mode_is_float(mode)) {
2755                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2756                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2757                 } else {
2758                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2759                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2760                 }
2761                 return res;
2762         }
2763         case EXPR_BINARY_MOD:
2764         case EXPR_BINARY_MOD_ASSIGN: {
2765                 ir_node *pin = new_Pin(new_NoMem());
2766                 assert(!mode_is_float(mode));
2767                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2768                                          op_pin_state_floats);
2769                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2770                 return res;
2771         }
2772         default:
2773                 panic("unexpected expression kind");
2774         }
2775 }
2776
2777 static ir_node *create_lazy_op(const binary_expression_t *expression)
2778 {
2779         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2780         type_t   *type = skip_typeref(expression->base.type);
2781         ir_mode  *mode = get_ir_mode_arithmetic(type);
2782
2783         if (is_constant_expression(expression->left)) {
2784                 bool val = fold_constant_to_bool(expression->left);
2785                 expression_kind_t ekind = expression->base.kind;
2786                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2787                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2788                         if (!val) {
2789                                 return new_Const(get_mode_null(mode));
2790                         }
2791                 } else {
2792                         if (val) {
2793                                 return new_Const(get_mode_one(mode));
2794                         }
2795                 }
2796
2797                 if (is_constant_expression(expression->right)) {
2798                         bool valr = fold_constant_to_bool(expression->right);
2799                         return valr ?
2800                                 new_Const(get_mode_one(mode)) :
2801                                 new_Const(get_mode_null(mode));
2802                 }
2803
2804                 return produce_condition_result(expression->right, mode, dbgi);
2805         }
2806
2807         return produce_condition_result((const expression_t*) expression, mode,
2808                                         dbgi);
2809 }
2810
2811 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2812                                             ir_node *right, ir_mode *mode);
2813
2814 static ir_node *create_assign_binop(const binary_expression_t *expression)
2815 {
2816         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2817         const expression_t *left_expr = expression->left;
2818         type_t             *type      = skip_typeref(left_expr->base.type);
2819         ir_node            *right     = expression_to_firm(expression->right);
2820         ir_node            *left_addr = expression_to_addr(left_expr);
2821         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2822         ir_node            *result    = create_op(dbgi, expression, left, right);
2823
2824         result = create_cast(dbgi, result, expression->right->base.type, type);
2825         result = do_strict_conv(dbgi, result);
2826
2827         result = set_value_for_expression_addr(left_expr, result, left_addr);
2828
2829         if (!is_type_compound(type)) {
2830                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2831                 result = create_conv(dbgi, result, mode_arithmetic);
2832         }
2833         return result;
2834 }
2835
2836 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2837 {
2838         expression_kind_t kind = expression->base.kind;
2839
2840         switch(kind) {
2841         case EXPR_BINARY_EQUAL:
2842         case EXPR_BINARY_NOTEQUAL:
2843         case EXPR_BINARY_LESS:
2844         case EXPR_BINARY_LESSEQUAL:
2845         case EXPR_BINARY_GREATER:
2846         case EXPR_BINARY_GREATEREQUAL:
2847         case EXPR_BINARY_ISGREATER:
2848         case EXPR_BINARY_ISGREATEREQUAL:
2849         case EXPR_BINARY_ISLESS:
2850         case EXPR_BINARY_ISLESSEQUAL:
2851         case EXPR_BINARY_ISLESSGREATER:
2852         case EXPR_BINARY_ISUNORDERED: {
2853                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2854                 ir_node *left  = expression_to_firm(expression->left);
2855                 ir_node *right = expression_to_firm(expression->right);
2856                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2857                 long     pnc   = get_pnc(kind, expression->left->base.type);
2858                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2859                 return proj;
2860         }
2861         case EXPR_BINARY_ASSIGN: {
2862                 ir_node *addr  = expression_to_addr(expression->left);
2863                 ir_node *right = expression_to_firm(expression->right);
2864                 ir_node *res
2865                         = set_value_for_expression_addr(expression->left, right, addr);
2866
2867                 type_t  *type            = skip_typeref(expression->base.type);
2868                 if (!is_type_compound(type)) {
2869                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2870                         res                      = create_conv(NULL, res, mode_arithmetic);
2871                 }
2872                 return res;
2873         }
2874         case EXPR_BINARY_ADD:
2875         case EXPR_BINARY_SUB:
2876         case EXPR_BINARY_MUL:
2877         case EXPR_BINARY_DIV:
2878         case EXPR_BINARY_MOD:
2879         case EXPR_BINARY_BITWISE_AND:
2880         case EXPR_BINARY_BITWISE_OR:
2881         case EXPR_BINARY_BITWISE_XOR:
2882         case EXPR_BINARY_SHIFTLEFT:
2883         case EXPR_BINARY_SHIFTRIGHT:
2884         {
2885                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2886                 ir_node  *left  = expression_to_firm(expression->left);
2887                 ir_node  *right = expression_to_firm(expression->right);
2888                 return create_op(dbgi, expression, left, right);
2889         }
2890         case EXPR_BINARY_LOGICAL_AND:
2891         case EXPR_BINARY_LOGICAL_OR:
2892                 return create_lazy_op(expression);
2893         case EXPR_BINARY_COMMA:
2894                 /* create side effects of left side */
2895                 (void) expression_to_firm(expression->left);
2896                 return _expression_to_firm(expression->right);
2897
2898         case EXPR_BINARY_ADD_ASSIGN:
2899         case EXPR_BINARY_SUB_ASSIGN:
2900         case EXPR_BINARY_MUL_ASSIGN:
2901         case EXPR_BINARY_MOD_ASSIGN:
2902         case EXPR_BINARY_DIV_ASSIGN:
2903         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2904         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2905         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2906         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2907         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2908                 return create_assign_binop(expression);
2909         default:
2910                 panic("TODO binexpr type");
2911         }
2912 }
2913
2914 static ir_node *array_access_addr(const array_access_expression_t *expression)
2915 {
2916         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2917         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2918         ir_node  *offset      = expression_to_firm(expression->index);
2919         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2920         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2921         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2922
2923         return result;
2924 }
2925
2926 static ir_node *array_access_to_firm(
2927                 const array_access_expression_t *expression)
2928 {
2929         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2930         ir_node  *addr   = array_access_addr(expression);
2931         type_t   *type   = revert_automatic_type_conversion(
2932                         (const expression_t*) expression);
2933         type             = skip_typeref(type);
2934
2935         return deref_address(dbgi, type, addr);
2936 }
2937
2938 static long get_offsetof_offset(const offsetof_expression_t *expression)
2939 {
2940         type_t *orig_type = expression->type;
2941         long    offset    = 0;
2942
2943         designator_t *designator = expression->designator;
2944         for ( ; designator != NULL; designator = designator->next) {
2945                 type_t *type = skip_typeref(orig_type);
2946                 /* be sure the type is constructed */
2947                 (void) get_ir_type(type);
2948
2949                 if (designator->symbol != NULL) {
2950                         assert(is_type_compound(type));
2951                         symbol_t *symbol = designator->symbol;
2952
2953                         compound_t *compound = type->compound.compound;
2954                         entity_t   *iter     = compound->members.entities;
2955                         for ( ; iter != NULL; iter = iter->base.next) {
2956                                 if (iter->base.symbol == symbol) {
2957                                         break;
2958                                 }
2959                         }
2960                         assert(iter != NULL);
2961
2962                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2963                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2964                         offset += get_entity_offset(iter->compound_member.entity);
2965
2966                         orig_type = iter->declaration.type;
2967                 } else {
2968                         expression_t *array_index = designator->array_index;
2969                         assert(designator->array_index != NULL);
2970                         assert(is_type_array(type));
2971
2972                         long index         = fold_constant_to_int(array_index);
2973                         ir_type *arr_type  = get_ir_type(type);
2974                         ir_type *elem_type = get_array_element_type(arr_type);
2975                         long     elem_size = get_type_size_bytes(elem_type);
2976
2977                         offset += index * elem_size;
2978
2979                         orig_type = type->array.element_type;
2980                 }
2981         }
2982
2983         return offset;
2984 }
2985
2986 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2987 {
2988         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2989         long      offset = get_offsetof_offset(expression);
2990         tarval   *tv     = new_tarval_from_long(offset, mode);
2991         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2992
2993         return new_d_Const(dbgi, tv);
2994 }
2995
2996 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2997                                      ir_entity *entity, type_t *type);
2998
2999 static ir_node *compound_literal_to_firm(
3000                 const compound_literal_expression_t *expression)
3001 {
3002         type_t *type = expression->type;
3003
3004         /* create an entity on the stack */
3005         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3006
3007         ident     *const id     = id_unique("CompLit.%u");
3008         ir_type   *const irtype = get_ir_type(type);
3009         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
3010         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
3011         set_entity_ld_ident(entity, id);
3012
3013         /* create initialisation code */
3014         initializer_t *initializer = expression->initializer;
3015         create_local_initializer(initializer, dbgi, entity, type);
3016
3017         /* create a sel for the compound literal address */
3018         ir_node *frame = get_irg_frame(current_ir_graph);
3019         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3020         return sel;
3021 }
3022
3023 /**
3024  * Transform a sizeof expression into Firm code.
3025  */
3026 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
3027 {
3028         type_t *const type = skip_typeref(expression->type);
3029         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
3030         if (is_type_array(type) && type->array.is_vla
3031                         && expression->tp_expression != NULL) {
3032                 expression_to_firm(expression->tp_expression);
3033         }
3034
3035         return get_type_size_node(type);
3036 }
3037
3038 static entity_t *get_expression_entity(const expression_t *expression)
3039 {
3040         if (expression->kind != EXPR_REFERENCE)
3041                 return NULL;
3042
3043         return expression->reference.entity;
3044 }
3045
3046 static unsigned get_cparser_entity_alignment(const entity_t *entity)
3047 {
3048         switch(entity->kind) {
3049         DECLARATION_KIND_CASES
3050                 return entity->declaration.alignment;
3051         case ENTITY_STRUCT:
3052         case ENTITY_UNION:
3053                 return entity->compound.alignment;
3054         case ENTITY_TYPEDEF:
3055                 return entity->typedefe.alignment;
3056         default:
3057                 break;
3058         }
3059         return 0;
3060 }
3061
3062 /**
3063  * Transform an alignof expression into Firm code.
3064  */
3065 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
3066 {
3067         unsigned alignment = 0;
3068
3069         const expression_t *tp_expression = expression->tp_expression;
3070         if (tp_expression != NULL) {
3071                 entity_t *entity = get_expression_entity(tp_expression);
3072                 if (entity != NULL) {
3073                         alignment = get_cparser_entity_alignment(entity);
3074                 }
3075         }
3076
3077         if (alignment == 0) {
3078                 type_t *type = expression->type;
3079                 alignment = get_type_alignment(type);
3080         }
3081
3082         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3083         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3084         tarval   *tv   = new_tarval_from_long(alignment, mode);
3085         return new_d_Const(dbgi, tv);
3086 }
3087
3088 static void init_ir_types(void);
3089
3090 static tarval *fold_constant_to_tarval(const expression_t *expression)
3091 {
3092         assert(is_type_valid(skip_typeref(expression->base.type)));
3093
3094         bool constant_folding_old = constant_folding;
3095         constant_folding = true;
3096
3097         init_ir_types();
3098
3099         assert(is_constant_expression(expression));
3100
3101         ir_graph *old_current_ir_graph = current_ir_graph;
3102         current_ir_graph = get_const_code_irg();
3103
3104         ir_node *cnst = expression_to_firm(expression);
3105         current_ir_graph = old_current_ir_graph;
3106
3107         if (!is_Const(cnst)) {
3108                 panic("couldn't fold constant");
3109         }
3110
3111         constant_folding = constant_folding_old;
3112
3113         tarval *tv = get_Const_tarval(cnst);
3114         return tv;
3115 }
3116
3117 long fold_constant_to_int(const expression_t *expression)
3118 {
3119         if (expression->kind == EXPR_INVALID)
3120                 return 0;
3121
3122         tarval *tv = fold_constant_to_tarval(expression);
3123         if (!tarval_is_long(tv)) {
3124                 panic("result of constant folding is not integer");
3125         }
3126
3127         return get_tarval_long(tv);
3128 }
3129
3130 bool fold_constant_to_bool(const expression_t *expression)
3131 {
3132         if (expression->kind == EXPR_INVALID)
3133                 return false;
3134         tarval *tv = fold_constant_to_tarval(expression);
3135         return !tarval_is_null(tv);
3136 }
3137
3138 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3139 {
3140         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3141
3142         /* first try to fold a constant condition */
3143         if (is_constant_expression(expression->condition)) {
3144                 bool val = fold_constant_to_bool(expression->condition);
3145                 if (val) {
3146                         expression_t *true_expression = expression->true_expression;
3147                         if (true_expression == NULL)
3148                                 true_expression = expression->condition;
3149                         return expression_to_firm(true_expression);
3150                 } else {
3151                         return expression_to_firm(expression->false_expression);
3152                 }
3153         }
3154
3155         ir_node *cur_block   = get_cur_block();
3156
3157         /* create the true block */
3158         ir_node *true_block  = new_immBlock();
3159         set_cur_block(true_block);
3160
3161         ir_node *true_val = expression->true_expression != NULL ?
3162                 expression_to_firm(expression->true_expression) : NULL;
3163         ir_node *true_jmp = new_Jmp();
3164
3165         /* create the false block */
3166         ir_node *false_block = new_immBlock();
3167         set_cur_block(false_block);
3168
3169         ir_node *false_val = expression_to_firm(expression->false_expression);
3170         ir_node *false_jmp = new_Jmp();
3171
3172         /* create the condition evaluation */
3173         set_cur_block(cur_block);
3174         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3175         if (expression->true_expression == NULL) {
3176                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3177                         true_val = cond_expr;
3178                 } else {
3179                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3180                          * comparison.  Generate a "1" as value for the true branch. */
3181                         true_val = new_Const(get_mode_one(mode_Is));
3182                 }
3183         }
3184         mature_immBlock(true_block);
3185         mature_immBlock(false_block);
3186
3187         /* create the common block */
3188         ir_node *in_cf[2] = { true_jmp, false_jmp };
3189         ir_node *block = new_Block(2, in_cf);
3190         set_cur_block(block);
3191
3192         /* TODO improve static semantics, so either both or no values are NULL */
3193         if (true_val == NULL || false_val == NULL)
3194                 return NULL;
3195
3196         ir_node *in[2] = { true_val, false_val };
3197         ir_mode *mode  = get_irn_mode(true_val);
3198         assert(get_irn_mode(false_val) == mode);
3199         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3200
3201         return val;
3202 }
3203
3204 /**
3205  * Returns an IR-node representing the address of a field.
3206  */
3207 static ir_node *select_addr(const select_expression_t *expression)
3208 {
3209         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3210
3211         construct_select_compound(expression);
3212
3213         ir_node *compound_addr = expression_to_firm(expression->compound);
3214
3215         entity_t *entry = expression->compound_entry;
3216         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3217         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3218
3219         if (constant_folding) {
3220                 ir_mode *mode = get_irn_mode(compound_addr);
3221                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3222                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3223                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3224         } else {
3225                 ir_entity *irentity = entry->compound_member.entity;
3226                 assert(irentity != NULL);
3227                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3228         }
3229 }
3230
3231 static ir_node *select_to_firm(const select_expression_t *expression)
3232 {
3233         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3234         ir_node  *addr = select_addr(expression);
3235         type_t   *type = revert_automatic_type_conversion(
3236                         (const expression_t*) expression);
3237         type           = skip_typeref(type);
3238
3239         entity_t *entry      = expression->compound_entry;
3240         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3241         type_t   *entry_type = skip_typeref(entry->declaration.type);
3242
3243         if (entry_type->kind == TYPE_BITFIELD) {
3244                 return bitfield_extract_to_firm(expression, addr);
3245         }
3246
3247         return deref_address(dbgi, type, addr);
3248 }
3249
3250 /* Values returned by __builtin_classify_type. */
3251 typedef enum gcc_type_class
3252 {
3253         no_type_class = -1,
3254         void_type_class,
3255         integer_type_class,
3256         char_type_class,
3257         enumeral_type_class,
3258         boolean_type_class,
3259         pointer_type_class,
3260         reference_type_class,
3261         offset_type_class,
3262         real_type_class,
3263         complex_type_class,
3264         function_type_class,
3265         method_type_class,
3266         record_type_class,
3267         union_type_class,
3268         array_type_class,
3269         string_type_class,
3270         set_type_class,
3271         file_type_class,
3272         lang_type_class
3273 } gcc_type_class;
3274
3275 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3276 {
3277         type_t *type = expr->type_expression->base.type;
3278
3279         /* FIXME gcc returns different values depending on whether compiling C or C++
3280          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3281         gcc_type_class tc;
3282         for (;;) {
3283                 type = skip_typeref(type);
3284                 switch (type->kind) {
3285                         case TYPE_ATOMIC: {
3286                                 const atomic_type_t *const atomic_type = &type->atomic;
3287                                 switch (atomic_type->akind) {
3288                                         /* should not be reached */
3289                                         case ATOMIC_TYPE_INVALID:
3290                                                 tc = no_type_class;
3291                                                 goto make_const;
3292
3293                                         /* gcc cannot do that */
3294                                         case ATOMIC_TYPE_VOID:
3295                                                 tc = void_type_class;
3296                                                 goto make_const;
3297
3298                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3299                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3300                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3301                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3302                                         case ATOMIC_TYPE_SHORT:
3303                                         case ATOMIC_TYPE_USHORT:
3304                                         case ATOMIC_TYPE_INT:
3305                                         case ATOMIC_TYPE_UINT:
3306                                         case ATOMIC_TYPE_LONG:
3307                                         case ATOMIC_TYPE_ULONG:
3308                                         case ATOMIC_TYPE_LONGLONG:
3309                                         case ATOMIC_TYPE_ULONGLONG:
3310                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3311                                                 tc = integer_type_class;
3312                                                 goto make_const;
3313
3314                                         case ATOMIC_TYPE_FLOAT:
3315                                         case ATOMIC_TYPE_DOUBLE:
3316                                         case ATOMIC_TYPE_LONG_DOUBLE:
3317                                                 tc = real_type_class;
3318                                                 goto make_const;
3319                                 }
3320                                 panic("Unexpected atomic type in classify_type_to_firm().");
3321                         }
3322
3323                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3324                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3325                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3326                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3327                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3328                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3329                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3330                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3331
3332                         /* gcc handles this as integer */
3333                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3334
3335                         /* gcc classifies the referenced type */
3336                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3337
3338                         case TYPE_BUILTIN:
3339                         /* typedef/typeof should be skipped already */
3340                         case TYPE_TYPEDEF:
3341                         case TYPE_TYPEOF:
3342                         case TYPE_INVALID:
3343                         case TYPE_ERROR:
3344                                 break;
3345                 }
3346                 panic("unexpected TYPE classify_type_to_firm().");
3347         }
3348
3349 make_const:;
3350         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3351         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3352         return new_d_Const(dbgi, tv);
3353 }
3354
3355 static ir_node *function_name_to_firm(
3356                 const funcname_expression_t *const expr)
3357 {
3358         switch(expr->kind) {
3359         case FUNCNAME_FUNCTION:
3360         case FUNCNAME_PRETTY_FUNCTION:
3361         case FUNCNAME_FUNCDNAME:
3362                 if (current_function_name == NULL) {
3363                         const source_position_t *const src_pos = &expr->base.source_position;
3364                         const char    *name  = current_function_entity->base.symbol->string;
3365                         const string_t string = { name, strlen(name) + 1 };
3366                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3367                 }
3368                 return current_function_name;
3369         case FUNCNAME_FUNCSIG:
3370                 if (current_funcsig == NULL) {
3371                         const source_position_t *const src_pos = &expr->base.source_position;
3372                         ir_entity *ent = get_irg_entity(current_ir_graph);
3373                         const char *const name = get_entity_ld_name(ent);
3374                         const string_t string = { name, strlen(name) + 1 };
3375                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3376                 }
3377                 return current_funcsig;
3378         }
3379         panic("Unsupported function name");
3380 }
3381
3382 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3383 {
3384         statement_t *statement = expr->statement;
3385
3386         assert(statement->kind == STATEMENT_COMPOUND);
3387         return compound_statement_to_firm(&statement->compound);
3388 }
3389
3390 static ir_node *va_start_expression_to_firm(
3391         const va_start_expression_t *const expr)
3392 {
3393         type_t    *const type        = current_function_entity->declaration.type;
3394         ir_type   *const method_type = get_ir_type(type);
3395         int        const n           = get_method_n_params(method_type) - 1;
3396         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3397         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3398         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3399         ir_node   *const no_mem      = new_NoMem();
3400         ir_node   *const arg_sel     =
3401                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3402
3403         type_t    *const param_type  = expr->parameter->base.type;
3404         ir_node   *const cnst        = get_type_size_node(param_type);
3405         ir_mode   *const mode        = get_irn_mode(cnst);
3406         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3407         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3408         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3409         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3410         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3411         set_value_for_expression(expr->ap, add);
3412
3413         return NULL;
3414 }
3415
3416 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3417 {
3418         type_t       *const type    = expr->base.type;
3419         expression_t *const ap_expr = expr->ap;
3420         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3421         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3422         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3423         ir_node      *const res     = deref_address(dbgi, type, ap);
3424
3425         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3426         ir_mode      *const mode    = get_irn_mode(cnst);
3427         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3428         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3429         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3430         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3431         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3432
3433         set_value_for_expression_addr(ap_expr, add, ap_addr);
3434
3435         return res;
3436 }
3437
3438 /**
3439  * Generate Firm for a va_copy expression.
3440  */
3441 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3442 {
3443         ir_node *const src = expression_to_firm(expr->src);
3444         set_value_for_expression(expr->dst, src);
3445         return NULL;
3446 }
3447
3448 static ir_node *dereference_addr(const unary_expression_t *const expression)
3449 {
3450         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3451         return expression_to_firm(expression->value);
3452 }
3453
3454 /**
3455  * Returns a IR-node representing an lvalue of the given expression.
3456  */
3457 static ir_node *expression_to_addr(const expression_t *expression)
3458 {
3459         switch(expression->kind) {
3460         case EXPR_ARRAY_ACCESS:
3461                 return array_access_addr(&expression->array_access);
3462         case EXPR_CALL:
3463                 return call_expression_to_firm(&expression->call);
3464         case EXPR_COMPOUND_LITERAL:
3465                 return compound_literal_to_firm(&expression->compound_literal);
3466         case EXPR_REFERENCE:
3467                 return reference_addr(&expression->reference);
3468         case EXPR_SELECT:
3469                 return select_addr(&expression->select);
3470         case EXPR_UNARY_DEREFERENCE:
3471                 return dereference_addr(&expression->unary);
3472         default:
3473                 break;
3474         }
3475         panic("trying to get address of non-lvalue");
3476 }
3477
3478 static ir_node *builtin_constant_to_firm(
3479                 const builtin_constant_expression_t *expression)
3480 {
3481         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3482         long     v;
3483
3484         if (is_constant_expression(expression->value)) {
3485                 v = 1;
3486         } else {
3487                 v = 0;
3488         }
3489         return new_Const_long(mode, v);
3490 }
3491
3492 static ir_node *builtin_types_compatible_to_firm(
3493                 const builtin_types_compatible_expression_t *expression)
3494 {
3495         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3496         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3497         long     const value = types_compatible(left, right) ? 1 : 0;
3498         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3499         return new_Const_long(mode, value);
3500 }
3501
3502 static ir_node *get_label_block(label_t *label)
3503 {
3504         if (label->block != NULL)
3505                 return label->block;
3506
3507         /* beware: might be called from create initializer with current_ir_graph
3508          * set to const_code_irg. */
3509         ir_graph *rem    = current_ir_graph;
3510         current_ir_graph = current_function;
3511
3512         ir_node *block = new_immBlock();
3513
3514         label->block = block;
3515
3516         ARR_APP1(label_t *, all_labels, label);
3517
3518         current_ir_graph = rem;
3519         return block;
3520 }
3521
3522 /**
3523  * Pointer to a label.  This is used for the
3524  * GNU address-of-label extension.
3525  */
3526 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3527 {
3528         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3529         ir_node   *block  = get_label_block(label->label);
3530         ir_entity *entity = create_Block_entity(block);
3531
3532         symconst_symbol value;
3533         value.entity_p = entity;
3534         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3535 }
3536
3537 /**
3538  * creates firm nodes for an expression. The difference between this function
3539  * and expression_to_firm is, that this version might produce mode_b nodes
3540  * instead of mode_Is.
3541  */
3542 static ir_node *_expression_to_firm(const expression_t *expression)
3543 {
3544 #ifndef NDEBUG
3545         if (!constant_folding) {
3546                 assert(!expression->base.transformed);
3547                 ((expression_t*) expression)->base.transformed = true;
3548         }
3549 #endif
3550
3551         switch (expression->kind) {
3552         EXPR_LITERAL_CASES
3553                 return literal_to_firm(&expression->literal);
3554         case EXPR_STRING_LITERAL:
3555                 return string_to_firm(&expression->base.source_position, "str.%u",
3556                                       &expression->literal.value);
3557         case EXPR_WIDE_STRING_LITERAL:
3558                 return wide_string_literal_to_firm(&expression->string_literal);
3559         case EXPR_REFERENCE:
3560                 return reference_expression_to_firm(&expression->reference);
3561         case EXPR_REFERENCE_ENUM_VALUE:
3562                 return reference_expression_enum_value_to_firm(&expression->reference);
3563         case EXPR_CALL:
3564                 return call_expression_to_firm(&expression->call);
3565         EXPR_UNARY_CASES
3566                 return unary_expression_to_firm(&expression->unary);
3567         EXPR_BINARY_CASES
3568                 return binary_expression_to_firm(&expression->binary);
3569         case EXPR_ARRAY_ACCESS:
3570                 return array_access_to_firm(&expression->array_access);
3571         case EXPR_SIZEOF:
3572                 return sizeof_to_firm(&expression->typeprop);
3573         case EXPR_ALIGNOF:
3574                 return alignof_to_firm(&expression->typeprop);
3575         case EXPR_CONDITIONAL:
3576                 return conditional_to_firm(&expression->conditional);
3577         case EXPR_SELECT:
3578                 return select_to_firm(&expression->select);
3579         case EXPR_CLASSIFY_TYPE:
3580                 return classify_type_to_firm(&expression->classify_type);
3581         case EXPR_FUNCNAME:
3582                 return function_name_to_firm(&expression->funcname);
3583         case EXPR_STATEMENT:
3584                 return statement_expression_to_firm(&expression->statement);
3585         case EXPR_VA_START:
3586                 return va_start_expression_to_firm(&expression->va_starte);
3587         case EXPR_VA_ARG:
3588                 return va_arg_expression_to_firm(&expression->va_arge);
3589         case EXPR_VA_COPY:
3590                 return va_copy_expression_to_firm(&expression->va_copye);
3591         case EXPR_BUILTIN_CONSTANT_P:
3592                 return builtin_constant_to_firm(&expression->builtin_constant);
3593         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3594                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3595         case EXPR_OFFSETOF:
3596                 return offsetof_to_firm(&expression->offsetofe);
3597         case EXPR_COMPOUND_LITERAL:
3598                 return compound_literal_to_firm(&expression->compound_literal);
3599         case EXPR_LABEL_ADDRESS:
3600                 return label_address_to_firm(&expression->label_address);
3601
3602         case EXPR_UNKNOWN:
3603         case EXPR_INVALID:
3604                 break;
3605         }
3606         panic("invalid expression found");
3607 }
3608
3609 /**
3610  * Check if a given expression is a GNU __builtin_expect() call.
3611  */
3612 static bool is_builtin_expect(const expression_t *expression)
3613 {
3614         if (expression->kind != EXPR_CALL)
3615                 return false;
3616
3617         expression_t *function = expression->call.function;
3618         if (function->kind != EXPR_REFERENCE)
3619                 return false;
3620         reference_expression_t *ref = &function->reference;
3621         if (ref->entity->kind         != ENTITY_FUNCTION ||
3622             ref->entity->function.btk != bk_gnu_builtin_expect)
3623                 return false;
3624
3625         return true;
3626 }
3627
3628 static bool produces_mode_b(const expression_t *expression)
3629 {
3630         switch (expression->kind) {
3631         case EXPR_BINARY_EQUAL:
3632         case EXPR_BINARY_NOTEQUAL:
3633         case EXPR_BINARY_LESS:
3634         case EXPR_BINARY_LESSEQUAL:
3635         case EXPR_BINARY_GREATER:
3636         case EXPR_BINARY_GREATEREQUAL:
3637         case EXPR_BINARY_ISGREATER:
3638         case EXPR_BINARY_ISGREATEREQUAL:
3639         case EXPR_BINARY_ISLESS:
3640         case EXPR_BINARY_ISLESSEQUAL:
3641         case EXPR_BINARY_ISLESSGREATER:
3642         case EXPR_BINARY_ISUNORDERED:
3643         case EXPR_UNARY_NOT:
3644                 return true;
3645
3646         case EXPR_CALL:
3647                 if (is_builtin_expect(expression)) {
3648                         expression_t *argument = expression->call.arguments->expression;
3649                         return produces_mode_b(argument);
3650                 }
3651                 return false;
3652         case EXPR_BINARY_COMMA:
3653                 return produces_mode_b(expression->binary.right);
3654
3655         default:
3656                 return false;
3657         }
3658 }
3659
3660 static ir_node *expression_to_firm(const expression_t *expression)
3661 {
3662         if (!produces_mode_b(expression)) {
3663                 ir_node *res = _expression_to_firm(expression);
3664                 assert(res == NULL || get_irn_mode(res) != mode_b);
3665                 return res;
3666         }
3667
3668         if (is_constant_expression(expression)) {
3669                 ir_node *res  = _expression_to_firm(expression);
3670                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3671                 assert(is_Const(res));
3672                 if (is_Const_null(res)) {
3673                         return new_Const_long(mode, 0);
3674                 } else {
3675                         return new_Const_long(mode, 1);
3676                 }
3677         }
3678
3679         /* we have to produce a 0/1 from the mode_b expression */
3680         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3681         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3682         return produce_condition_result(expression, mode, dbgi);
3683 }
3684
3685 /**
3686  * create a short-circuit expression evaluation that tries to construct
3687  * efficient control flow structures for &&, || and ! expressions
3688  */
3689 static ir_node *create_condition_evaluation(const expression_t *expression,
3690                                             ir_node *true_block,
3691                                             ir_node *false_block)
3692 {
3693         switch(expression->kind) {
3694         case EXPR_UNARY_NOT: {
3695                 const unary_expression_t *unary_expression = &expression->unary;
3696                 create_condition_evaluation(unary_expression->value, false_block,
3697                                             true_block);
3698                 return NULL;
3699         }
3700         case EXPR_BINARY_LOGICAL_AND: {
3701                 const binary_expression_t *binary_expression = &expression->binary;
3702
3703                 ir_node *extra_block = new_immBlock();
3704                 create_condition_evaluation(binary_expression->left, extra_block,
3705                                             false_block);
3706                 mature_immBlock(extra_block);
3707                 set_cur_block(extra_block);
3708                 create_condition_evaluation(binary_expression->right, true_block,
3709                                             false_block);
3710                 return NULL;
3711         }
3712         case EXPR_BINARY_LOGICAL_OR: {
3713                 const binary_expression_t *binary_expression = &expression->binary;
3714
3715                 ir_node *extra_block = new_immBlock();
3716                 create_condition_evaluation(binary_expression->left, true_block,
3717                                             extra_block);
3718                 mature_immBlock(extra_block);
3719                 set_cur_block(extra_block);
3720                 create_condition_evaluation(binary_expression->right, true_block,
3721                                             false_block);
3722                 return NULL;
3723         }
3724         default:
3725                 break;
3726         }
3727
3728         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3729         ir_node  *cond_expr  = _expression_to_firm(expression);
3730         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3731         ir_node  *cond       = new_d_Cond(dbgi, condition);
3732         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3733         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3734
3735         /* set branch prediction info based on __builtin_expect */
3736         if (is_builtin_expect(expression) && is_Cond(cond)) {
3737                 call_argument_t *argument = expression->call.arguments->next;
3738                 if (is_constant_expression(argument->expression)) {
3739                         bool             cnst = fold_constant_to_bool(argument->expression);
3740                         cond_jmp_predicate pred;
3741
3742                         if (cnst == false) {
3743                                 pred = COND_JMP_PRED_FALSE;
3744                         } else {
3745                                 pred = COND_JMP_PRED_TRUE;
3746                         }
3747                         set_Cond_jmp_pred(cond, pred);
3748                 }
3749         }
3750
3751         add_immBlock_pred(true_block, true_proj);
3752         add_immBlock_pred(false_block, false_proj);
3753
3754         set_cur_block(NULL);
3755         return cond_expr;
3756 }
3757
3758 static void create_variable_entity(entity_t *variable,
3759                                    declaration_kind_t declaration_kind,
3760                                    ir_type *parent_type)
3761 {
3762         assert(variable->kind == ENTITY_VARIABLE);
3763         type_t    *type = skip_typeref(variable->declaration.type);
3764
3765         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3766         ir_type   *const irtype    = get_ir_type(type);
3767         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3768         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3769         unsigned         alignment = variable->declaration.alignment;
3770
3771         set_entity_alignment(irentity, alignment);
3772
3773         handle_decl_modifiers(irentity, variable);
3774
3775         variable->declaration.kind  = (unsigned char) declaration_kind;
3776         variable->variable.v.entity = irentity;
3777         set_entity_ld_ident(irentity, create_ld_ident(variable));
3778
3779         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3780                 set_entity_volatility(irentity, volatility_is_volatile);
3781         }
3782 }
3783
3784
3785 typedef struct type_path_entry_t type_path_entry_t;
3786 struct type_path_entry_t {
3787         type_t           *type;
3788         ir_initializer_t *initializer;
3789         size_t            index;
3790         entity_t         *compound_entry;
3791 };
3792
3793 typedef struct type_path_t type_path_t;
3794 struct type_path_t {
3795         type_path_entry_t *path;
3796         type_t            *top_type;
3797         bool               invalid;
3798 };
3799
3800 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3801 {
3802         size_t len = ARR_LEN(path->path);
3803
3804         for (size_t i = 0; i < len; ++i) {
3805                 const type_path_entry_t *entry = & path->path[i];
3806
3807                 type_t *type = skip_typeref(entry->type);
3808                 if (is_type_compound(type)) {
3809                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3810                 } else if (is_type_array(type)) {
3811                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3812                 } else {
3813                         fprintf(stderr, "-INVALID-");
3814                 }
3815         }
3816         fprintf(stderr, "  (");
3817         print_type(path->top_type);
3818         fprintf(stderr, ")");
3819 }
3820
3821 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3822 {
3823         size_t len = ARR_LEN(path->path);
3824         assert(len > 0);
3825         return & path->path[len-1];
3826 }
3827
3828 static type_path_entry_t *append_to_type_path(type_path_t *path)
3829 {
3830         size_t len = ARR_LEN(path->path);
3831         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3832
3833         type_path_entry_t *result = & path->path[len];
3834         memset(result, 0, sizeof(result[0]));
3835         return result;
3836 }
3837
3838 static size_t get_compound_member_count(const compound_type_t *type)
3839 {
3840         compound_t *compound  = type->compound;
3841         size_t      n_members = 0;
3842         entity_t   *member    = compound->members.entities;
3843         for ( ; member != NULL; member = member->base.next) {
3844                 ++n_members;
3845         }
3846
3847         return n_members;
3848 }
3849
3850 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3851 {
3852         type_t *orig_top_type = path->top_type;
3853         type_t *top_type      = skip_typeref(orig_top_type);
3854
3855         assert(is_type_compound(top_type) || is_type_array(top_type));
3856
3857         if (ARR_LEN(path->path) == 0) {
3858                 return NULL;
3859         } else {
3860                 type_path_entry_t *top         = get_type_path_top(path);
3861                 ir_initializer_t  *initializer = top->initializer;
3862                 return get_initializer_compound_value(initializer, top->index);
3863         }
3864 }
3865
3866 static void descend_into_subtype(type_path_t *path)
3867 {
3868         type_t *orig_top_type = path->top_type;
3869         type_t *top_type      = skip_typeref(orig_top_type);
3870
3871         assert(is_type_compound(top_type) || is_type_array(top_type));
3872
3873         ir_initializer_t *initializer = get_initializer_entry(path);
3874
3875         type_path_entry_t *top = append_to_type_path(path);
3876         top->type              = top_type;
3877
3878         size_t len;
3879
3880         if (is_type_compound(top_type)) {
3881                 compound_t *compound = top_type->compound.compound;
3882                 entity_t   *entry    = compound->members.entities;
3883
3884                 top->compound_entry = entry;
3885                 top->index          = 0;
3886                 len                 = get_compound_member_count(&top_type->compound);
3887                 if (entry != NULL) {
3888                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3889                         path->top_type = entry->declaration.type;
3890                 }
3891         } else {
3892                 assert(is_type_array(top_type));
3893                 assert(top_type->array.size > 0);
3894
3895                 top->index     = 0;
3896                 path->top_type = top_type->array.element_type;
3897                 len            = top_type->array.size;
3898         }
3899         if (initializer == NULL
3900                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3901                 initializer = create_initializer_compound(len);
3902                 /* we have to set the entry at the 2nd latest path entry... */
3903                 size_t path_len = ARR_LEN(path->path);
3904                 assert(path_len >= 1);
3905                 if (path_len > 1) {
3906                         type_path_entry_t *entry        = & path->path[path_len-2];
3907                         ir_initializer_t  *tinitializer = entry->initializer;
3908                         set_initializer_compound_value(tinitializer, entry->index,
3909                                                        initializer);
3910                 }
3911         }
3912         top->initializer = initializer;
3913 }
3914
3915 static void ascend_from_subtype(type_path_t *path)
3916 {
3917         type_path_entry_t *top = get_type_path_top(path);
3918
3919         path->top_type = top->type;
3920
3921         size_t len = ARR_LEN(path->path);
3922         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3923 }
3924
3925 static void walk_designator(type_path_t *path, const designator_t *designator)
3926 {
3927         /* designators start at current object type */
3928         ARR_RESIZE(type_path_entry_t, path->path, 1);
3929
3930         for ( ; designator != NULL; designator = designator->next) {
3931                 type_path_entry_t *top         = get_type_path_top(path);
3932                 type_t            *orig_type   = top->type;
3933                 type_t            *type        = skip_typeref(orig_type);
3934
3935                 if (designator->symbol != NULL) {
3936                         assert(is_type_compound(type));
3937                         size_t    index  = 0;
3938                         symbol_t *symbol = designator->symbol;
3939
3940                         compound_t *compound = type->compound.compound;
3941                         entity_t   *iter     = compound->members.entities;
3942                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3943                                 if (iter->base.symbol == symbol) {
3944                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3945                                         break;
3946                                 }
3947                         }
3948                         assert(iter != NULL);
3949
3950                         /* revert previous initialisations of other union elements */
3951                         if (type->kind == TYPE_COMPOUND_UNION) {
3952                                 ir_initializer_t *initializer = top->initializer;
3953                                 if (initializer != NULL
3954                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3955                                         /* are we writing to a new element? */
3956                                         ir_initializer_t *oldi
3957                                                 = get_initializer_compound_value(initializer, index);
3958                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3959                                                 /* clear initializer */
3960                                                 size_t len
3961                                                         = get_initializer_compound_n_entries(initializer);
3962                                                 ir_initializer_t *nulli = get_initializer_null();
3963                                                 for (size_t i = 0; i < len; ++i) {
3964                                                         set_initializer_compound_value(initializer, i,
3965                                                                                        nulli);
3966                                                 }
3967                                         }
3968                                 }
3969                         }
3970
3971                         top->type           = orig_type;
3972                         top->compound_entry = iter;
3973                         top->index          = index;
3974                         orig_type           = iter->declaration.type;
3975                 } else {
3976                         expression_t *array_index = designator->array_index;
3977                         assert(designator->array_index != NULL);
3978                         assert(is_type_array(type));
3979
3980                         long index = fold_constant_to_int(array_index);
3981                         assert(index >= 0);
3982 #ifndef NDEBUG
3983                         if (type->array.size_constant) {
3984                                 long array_size = type->array.size;
3985                                 assert(index < array_size);
3986                         }
3987 #endif
3988
3989                         top->type  = orig_type;
3990                         top->index = (size_t) index;
3991                         orig_type  = type->array.element_type;
3992                 }
3993                 path->top_type = orig_type;
3994
3995                 if (designator->next != NULL) {
3996                         descend_into_subtype(path);
3997                 }
3998         }
3999
4000         path->invalid  = false;
4001 }
4002
4003 static void advance_current_object(type_path_t *path)
4004 {
4005         if (path->invalid) {
4006                 /* TODO: handle this... */
4007                 panic("invalid initializer in ast2firm (excessive elements)");
4008         }
4009
4010         type_path_entry_t *top = get_type_path_top(path);
4011
4012         type_t *type = skip_typeref(top->type);
4013         if (is_type_union(type)) {
4014                 /* only the first element is initialized in unions */
4015                 top->compound_entry = NULL;
4016         } else if (is_type_struct(type)) {
4017                 entity_t *entry = top->compound_entry;
4018
4019                 top->index++;
4020                 entry               = entry->base.next;
4021                 top->compound_entry = entry;
4022                 if (entry != NULL) {
4023                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4024                         path->top_type = entry->declaration.type;
4025                         return;
4026                 }
4027         } else {
4028                 assert(is_type_array(type));
4029
4030                 top->index++;
4031                 if (!type->array.size_constant || top->index < type->array.size) {
4032                         return;
4033                 }
4034         }
4035
4036         /* we're past the last member of the current sub-aggregate, try if we
4037          * can ascend in the type hierarchy and continue with another subobject */
4038         size_t len = ARR_LEN(path->path);
4039
4040         if (len > 1) {
4041                 ascend_from_subtype(path);
4042                 advance_current_object(path);
4043         } else {
4044                 path->invalid = true;
4045         }
4046 }
4047
4048
4049 static ir_initializer_t *create_ir_initializer(
4050                 const initializer_t *initializer, type_t *type);
4051
4052 static ir_initializer_t *create_ir_initializer_value(
4053                 const initializer_value_t *initializer)
4054 {
4055         if (is_type_compound(initializer->value->base.type)) {
4056                 panic("initializer creation for compounds not implemented yet");
4057         }
4058         type_t       *type = initializer->value->base.type;
4059         expression_t *expr = initializer->value;
4060         if (initializer_use_bitfield_basetype) {
4061                 type_t *skipped = skip_typeref(type);
4062                 if (skipped->kind == TYPE_BITFIELD) {
4063                         /* remove the bitfield cast... */
4064                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
4065                         expr = expr->unary.value;
4066                         type = skipped->bitfield.base_type;
4067                 }
4068         }
4069         ir_node *value = expression_to_firm(expr);
4070         ir_mode *mode  = get_ir_mode_storage(type);
4071         value          = create_conv(NULL, value, mode);
4072         return create_initializer_const(value);
4073 }
4074
4075 /** test wether type can be initialized by a string constant */
4076 static bool is_string_type(type_t *type)
4077 {
4078         type_t *inner;
4079         if (is_type_pointer(type)) {
4080                 inner = skip_typeref(type->pointer.points_to);
4081         } else if(is_type_array(type)) {
4082                 inner = skip_typeref(type->array.element_type);
4083         } else {
4084                 return false;
4085         }
4086
4087         return is_type_integer(inner);
4088 }
4089
4090 static ir_initializer_t *create_ir_initializer_list(
4091                 const initializer_list_t *initializer, type_t *type)
4092 {
4093         type_path_t path;
4094         memset(&path, 0, sizeof(path));
4095         path.top_type = type;
4096         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4097
4098         descend_into_subtype(&path);
4099
4100         for (size_t i = 0; i < initializer->len; ++i) {
4101                 const initializer_t *sub_initializer = initializer->initializers[i];
4102
4103                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4104                         walk_designator(&path, sub_initializer->designator.designator);
4105                         continue;
4106                 }
4107
4108                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4109                         /* we might have to descend into types until we're at a scalar
4110                          * type */
4111                         while(true) {
4112                                 type_t *orig_top_type = path.top_type;
4113                                 type_t *top_type      = skip_typeref(orig_top_type);
4114
4115                                 if (is_type_scalar(top_type))
4116                                         break;
4117                                 descend_into_subtype(&path);
4118                         }
4119                 } else if (sub_initializer->kind == INITIALIZER_STRING
4120                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4121                         /* we might have to descend into types until we're at a scalar
4122                          * type */
4123                         while (true) {
4124                                 type_t *orig_top_type = path.top_type;
4125                                 type_t *top_type      = skip_typeref(orig_top_type);
4126
4127                                 if (is_string_type(top_type))
4128                                         break;
4129                                 descend_into_subtype(&path);
4130                         }
4131                 }
4132
4133                 ir_initializer_t *sub_irinitializer
4134                         = create_ir_initializer(sub_initializer, path.top_type);
4135
4136                 size_t path_len = ARR_LEN(path.path);
4137                 assert(path_len >= 1);
4138                 type_path_entry_t *entry        = & path.path[path_len-1];
4139                 ir_initializer_t  *tinitializer = entry->initializer;
4140                 set_initializer_compound_value(tinitializer, entry->index,
4141                                                sub_irinitializer);
4142
4143                 advance_current_object(&path);
4144         }
4145
4146         assert(ARR_LEN(path.path) >= 1);
4147         ir_initializer_t *result = path.path[0].initializer;
4148         DEL_ARR_F(path.path);
4149
4150         return result;
4151 }
4152
4153 static ir_initializer_t *create_ir_initializer_string(
4154                 const initializer_string_t *initializer, type_t *type)
4155 {
4156         type = skip_typeref(type);
4157
4158         size_t            string_len    = initializer->string.size;
4159         assert(type->kind == TYPE_ARRAY);
4160         assert(type->array.size_constant);
4161         size_t            len           = type->array.size;
4162         ir_initializer_t *irinitializer = create_initializer_compound(len);
4163
4164         const char *string = initializer->string.begin;
4165         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4166
4167         for (size_t i = 0; i < len; ++i) {
4168                 char c = 0;
4169                 if (i < string_len)
4170                         c = string[i];
4171
4172                 tarval           *tv = new_tarval_from_long(c, mode);
4173                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4174
4175                 set_initializer_compound_value(irinitializer, i, char_initializer);
4176         }
4177
4178         return irinitializer;
4179 }
4180
4181 static ir_initializer_t *create_ir_initializer_wide_string(
4182                 const initializer_wide_string_t *initializer, type_t *type)
4183 {
4184         assert(type->kind == TYPE_ARRAY);
4185         assert(type->array.size_constant);
4186         size_t            len           = type->array.size;
4187         size_t            string_len    = wstrlen(&initializer->string);
4188         ir_initializer_t *irinitializer = create_initializer_compound(len);
4189
4190         const char *p    = initializer->string.begin;
4191         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4192
4193         for (size_t i = 0; i < len; ++i) {
4194                 utf32 c = 0;
4195                 if (i < string_len) {
4196                         c = read_utf8_char(&p);
4197                 }
4198                 tarval *tv = new_tarval_from_long(c, mode);
4199                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4200
4201                 set_initializer_compound_value(irinitializer, i, char_initializer);
4202         }
4203
4204         return irinitializer;
4205 }
4206
4207 static ir_initializer_t *create_ir_initializer(
4208                 const initializer_t *initializer, type_t *type)
4209 {
4210         switch(initializer->kind) {
4211                 case INITIALIZER_STRING:
4212                         return create_ir_initializer_string(&initializer->string, type);
4213
4214                 case INITIALIZER_WIDE_STRING:
4215                         return create_ir_initializer_wide_string(&initializer->wide_string,
4216                                                                  type);
4217
4218                 case INITIALIZER_LIST:
4219                         return create_ir_initializer_list(&initializer->list, type);
4220
4221                 case INITIALIZER_VALUE:
4222                         return create_ir_initializer_value(&initializer->value);
4223
4224                 case INITIALIZER_DESIGNATOR:
4225                         panic("unexpected designator initializer found");
4226         }
4227         panic("unknown initializer");
4228 }
4229
4230 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4231                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4232 {
4233         switch(get_initializer_kind(initializer)) {
4234         case IR_INITIALIZER_NULL: {
4235                 /* NULL is undefined for dynamic initializers */
4236                 return;
4237         }
4238         case IR_INITIALIZER_CONST: {
4239                 ir_node *node     = get_initializer_const_value(initializer);
4240                 ir_type *ent_type = get_entity_type(entity);
4241
4242                 /* is it a bitfield type? */
4243                 if (is_Primitive_type(ent_type) &&
4244                                 get_primitive_base_type(ent_type) != NULL) {
4245                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4246                         return;
4247                 }
4248
4249                 assert(get_type_mode(type) == get_irn_mode(node));
4250                 ir_node *mem    = get_store();
4251                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4252                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4253                 set_store(proj_m);
4254                 return;
4255         }
4256         case IR_INITIALIZER_TARVAL: {
4257                 tarval  *tv       = get_initializer_tarval_value(initializer);
4258                 ir_node *cnst     = new_d_Const(dbgi, tv);
4259                 ir_type *ent_type = get_entity_type(entity);
4260
4261                 /* is it a bitfield type? */
4262                 if (is_Primitive_type(ent_type) &&
4263                                 get_primitive_base_type(ent_type) != NULL) {
4264                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4265                         return;
4266                 }
4267
4268                 assert(get_type_mode(type) == get_tarval_mode(tv));
4269                 ir_node *mem    = get_store();
4270                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4271                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4272                 set_store(proj_m);
4273                 return;
4274         }
4275         case IR_INITIALIZER_COMPOUND: {
4276                 assert(is_compound_type(type) || is_Array_type(type));
4277                 int n_members;
4278                 if (is_Array_type(type)) {
4279                         assert(has_array_upper_bound(type, 0));
4280                         n_members = get_array_upper_bound_int(type, 0);
4281                 } else {
4282                         n_members = get_compound_n_members(type);
4283                 }
4284
4285                 if (get_initializer_compound_n_entries(initializer)
4286                                 != (unsigned) n_members)
4287                         panic("initializer doesn't match compound type");
4288
4289                 for (int i = 0; i < n_members; ++i) {
4290                         ir_node   *addr;
4291                         ir_type   *irtype;
4292                         ir_entity *sub_entity;
4293                         if (is_Array_type(type)) {
4294                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4295                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4296                                 ir_node   *in[1]    = { cnst };
4297                                 irtype     = get_array_element_type(type);
4298                                 sub_entity = get_array_element_entity(type);
4299                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4300                                                        sub_entity);
4301                         } else {
4302                                 sub_entity = get_compound_member(type, i);
4303                                 irtype     = get_entity_type(sub_entity);
4304                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4305                                                              sub_entity);
4306                         }
4307
4308                         ir_initializer_t *sub_init
4309                                 = get_initializer_compound_value(initializer, i);
4310
4311                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4312                                                        addr);
4313                 }
4314                 return;
4315         }
4316         }
4317
4318         panic("invalid IR_INITIALIZER found");
4319 }
4320
4321 static void create_dynamic_initializer(ir_initializer_t *initializer,
4322                 dbg_info *dbgi, ir_entity *entity)
4323 {
4324         ir_node *frame     = get_irg_frame(current_ir_graph);
4325         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4326         ir_type *type      = get_entity_type(entity);
4327
4328         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4329 }
4330
4331 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4332                                      ir_entity *entity, type_t *type)
4333 {
4334         ir_node *memory = get_store();
4335         ir_node *nomem  = new_NoMem();
4336         ir_node *frame  = get_irg_frame(current_ir_graph);
4337         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4338
4339         if (initializer->kind == INITIALIZER_VALUE) {
4340                 initializer_value_t *initializer_value = &initializer->value;
4341
4342                 ir_node *value = expression_to_firm(initializer_value->value);
4343                 type = skip_typeref(type);
4344                 assign_value(dbgi, addr, type, value);
4345                 return;
4346         }
4347
4348         if (!is_constant_initializer(initializer)) {
4349                 bool old_initializer_use_bitfield_basetype
4350                         = initializer_use_bitfield_basetype;
4351                 initializer_use_bitfield_basetype = true;
4352                 ir_initializer_t *irinitializer
4353                         = create_ir_initializer(initializer, type);
4354                 initializer_use_bitfield_basetype
4355                         = old_initializer_use_bitfield_basetype;
4356
4357                 create_dynamic_initializer(irinitializer, dbgi, entity);
4358                 return;
4359         }
4360
4361         /* create the ir_initializer */
4362         ir_graph *const old_current_ir_graph = current_ir_graph;
4363         current_ir_graph = get_const_code_irg();
4364
4365         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4366
4367         assert(current_ir_graph == get_const_code_irg());
4368         current_ir_graph = old_current_ir_graph;
4369
4370         /* create a "template" entity which is copied to the entity on the stack */
4371         ident     *const id          = id_unique("initializer.%u");
4372         ir_type   *const irtype      = get_ir_type(type);
4373         ir_type   *const global_type = get_glob_type();
4374         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4375         set_entity_ld_ident(init_entity, id);
4376
4377         set_entity_visibility(init_entity, ir_visibility_private);
4378         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4379
4380         set_entity_initializer(init_entity, irinitializer);
4381
4382         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4383         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4384
4385         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4386         set_store(copyb_mem);
4387 }
4388
4389 static void create_initializer_local_variable_entity(entity_t *entity)
4390 {
4391         assert(entity->kind == ENTITY_VARIABLE);
4392         initializer_t *initializer = entity->variable.initializer;
4393         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4394         ir_entity     *irentity    = entity->variable.v.entity;
4395         type_t        *type        = entity->declaration.type;
4396
4397         create_local_initializer(initializer, dbgi, irentity, type);
4398 }
4399
4400 static void create_variable_initializer(entity_t *entity)
4401 {
4402         assert(entity->kind == ENTITY_VARIABLE);
4403         initializer_t *initializer = entity->variable.initializer;
4404         if (initializer == NULL)
4405                 return;
4406
4407         declaration_kind_t declaration_kind
4408                 = (declaration_kind_t) entity->declaration.kind;
4409         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4410                 create_initializer_local_variable_entity(entity);
4411                 return;
4412         }
4413
4414         type_t            *type = entity->declaration.type;
4415         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4416
4417         if (initializer->kind == INITIALIZER_VALUE) {
4418                 initializer_value_t *initializer_value = &initializer->value;
4419                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4420
4421                 ir_node *value = expression_to_firm(initializer_value->value);
4422
4423                 type_t  *type = initializer_value->value->base.type;
4424                 ir_mode *mode = get_ir_mode_storage(type);
4425                 value = create_conv(dbgi, value, mode);
4426                 value = do_strict_conv(dbgi, value);
4427
4428                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4429                         set_value(entity->variable.v.value_number, value);
4430                 } else {
4431                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4432
4433                         ir_entity *irentity = entity->variable.v.entity;
4434
4435                         if (tq & TYPE_QUALIFIER_CONST
4436                                         && get_entity_owner(irentity) != get_tls_type()) {
4437                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4438                         }
4439                         set_atomic_ent_value(irentity, value);
4440                 }
4441         } else {
4442                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4443                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4444
4445                 ir_entity        *irentity        = entity->variable.v.entity;
4446                 ir_initializer_t *irinitializer
4447                         = create_ir_initializer(initializer, type);
4448
4449                 if (tq & TYPE_QUALIFIER_CONST) {
4450                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4451                 }
4452                 set_entity_initializer(irentity, irinitializer);
4453         }
4454 }
4455
4456 static void create_variable_length_array(entity_t *entity)
4457 {
4458         assert(entity->kind == ENTITY_VARIABLE);
4459         assert(entity->variable.initializer == NULL);
4460
4461         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4462         entity->variable.v.vla_base = NULL;
4463
4464         /* TODO: record VLA somewhere so we create the free node when we leave
4465          * it's scope */
4466 }
4467
4468 static void allocate_variable_length_array(entity_t *entity)
4469 {
4470         assert(entity->kind == ENTITY_VARIABLE);
4471         assert(entity->variable.initializer == NULL);
4472         assert(get_cur_block() != NULL);
4473
4474         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4475         type_t   *type      = entity->declaration.type;
4476         ir_type  *el_type   = get_ir_type(type->array.element_type);
4477
4478         /* make sure size_node is calculated */
4479         get_type_size_node(type);
4480         ir_node  *elems = type->array.size_node;
4481         ir_node  *mem   = get_store();
4482         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4483
4484         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4485         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4486         set_store(proj_m);
4487
4488         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4489         entity->variable.v.vla_base = addr;
4490 }
4491
4492 /**
4493  * Creates a Firm local variable from a declaration.
4494  */
4495 static void create_local_variable(entity_t *entity)
4496 {
4497         assert(entity->kind == ENTITY_VARIABLE);
4498         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4499
4500         bool needs_entity = entity->variable.address_taken;
4501         type_t *type = skip_typeref(entity->declaration.type);
4502
4503         /* is it a variable length array? */
4504         if (is_type_array(type) && !type->array.size_constant) {
4505                 create_variable_length_array(entity);
4506                 return;
4507         } else if (is_type_array(type) || is_type_compound(type)) {
4508                 needs_entity = true;
4509         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4510                 needs_entity = true;
4511         }
4512
4513         if (needs_entity) {
4514                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4515                 create_variable_entity(entity,
4516                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4517                                        frame_type);
4518         } else {
4519                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4520                 entity->variable.v.value_number = next_value_number_function;
4521                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4522                                         entity);
4523                 ++next_value_number_function;
4524         }
4525 }
4526
4527 static void create_local_static_variable(entity_t *entity)
4528 {
4529         assert(entity->kind == ENTITY_VARIABLE);
4530         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4531
4532         type_t   *type           = skip_typeref(entity->declaration.type);
4533         ir_type  *const var_type = entity->variable.thread_local ?
4534                 get_tls_type() : get_glob_type();
4535         ir_type  *const irtype   = get_ir_type(type);
4536         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4537
4538         size_t l = strlen(entity->base.symbol->string);
4539         char   buf[l + sizeof(".%u")];
4540         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4541         ident     *const id       = id_unique(buf);
4542         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4543
4544         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4545                 set_entity_volatility(irentity, volatility_is_volatile);
4546         }
4547
4548         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4549         entity->variable.v.entity = irentity;
4550
4551         set_entity_ld_ident(irentity, id);
4552         set_entity_visibility(irentity, ir_visibility_local);
4553
4554         ir_graph *const old_current_ir_graph = current_ir_graph;
4555         current_ir_graph = get_const_code_irg();
4556
4557         create_variable_initializer(entity);
4558
4559         assert(current_ir_graph == get_const_code_irg());
4560         current_ir_graph = old_current_ir_graph;
4561 }
4562
4563
4564
4565 static void return_statement_to_firm(return_statement_t *statement)
4566 {
4567         if (get_cur_block() == NULL)
4568                 return;
4569
4570         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4571         type_t   *type        = current_function_entity->declaration.type;
4572         ir_type  *func_irtype = get_ir_type(type);
4573
4574
4575         ir_node *in[1];
4576         int      in_len;
4577         if (get_method_n_ress(func_irtype) > 0) {
4578                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4579
4580                 if (statement->value != NULL) {
4581                         ir_node *node = expression_to_firm(statement->value);
4582                         if (!is_compound_type(res_type)) {
4583                                 type_t  *type = statement->value->base.type;
4584                                 ir_mode *mode = get_ir_mode_storage(type);
4585                                 node          = create_conv(dbgi, node, mode);
4586                                 node          = do_strict_conv(dbgi, node);
4587                         }
4588                         in[0] = node;
4589                 } else {
4590                         ir_mode *mode;
4591                         if (is_compound_type(res_type)) {
4592                                 mode = mode_P_data;
4593                         } else {
4594                                 mode = get_type_mode(res_type);
4595                         }
4596                         in[0] = new_Unknown(mode);
4597                 }
4598                 in_len = 1;
4599         } else {
4600                 /* build return_value for its side effects */
4601                 if (statement->value != NULL) {
4602                         expression_to_firm(statement->value);
4603                 }
4604                 in_len = 0;
4605         }
4606
4607         ir_node  *store = get_store();
4608         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4609
4610         ir_node *end_block = get_irg_end_block(current_ir_graph);
4611         add_immBlock_pred(end_block, ret);
4612
4613         set_cur_block(NULL);
4614 }
4615
4616 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4617 {
4618         if (get_cur_block() == NULL)
4619                 return NULL;
4620
4621         return expression_to_firm(statement->expression);
4622 }
4623
4624 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4625 {
4626         entity_t *entity = compound->scope.entities;
4627         for ( ; entity != NULL; entity = entity->base.next) {
4628                 if (!is_declaration(entity))
4629                         continue;
4630
4631                 create_local_declaration(entity);
4632         }
4633
4634         ir_node     *result    = NULL;
4635         statement_t *statement = compound->statements;
4636         for ( ; statement != NULL; statement = statement->base.next) {
4637                 if (statement->base.next == NULL
4638                                 && statement->kind == STATEMENT_EXPRESSION) {
4639                         result = expression_statement_to_firm(
4640                                         &statement->expression);
4641                         break;
4642                 }
4643                 statement_to_firm(statement);
4644         }
4645
4646         return result;
4647 }
4648
4649 static void create_global_variable(entity_t *entity)
4650 {
4651         ir_linkage    linkage    = 0;
4652         ir_visibility visibility = ir_visibility_default;
4653         ir_entity    *irentity;
4654         assert(entity->kind == ENTITY_VARIABLE);
4655
4656         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4657         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4658         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4659         case STORAGE_CLASS_NONE:
4660                 visibility = ir_visibility_default;
4661                 /* uninitialized globals get merged in C */
4662                 if (entity->variable.initializer == NULL)
4663                         linkage |= IR_LINKAGE_MERGE;
4664                 break;
4665         case STORAGE_CLASS_TYPEDEF:
4666         case STORAGE_CLASS_AUTO:
4667         case STORAGE_CLASS_REGISTER:
4668                 panic("invalid storage class for global var");
4669         }
4670
4671         ir_type *var_type = get_glob_type();
4672         if (entity->variable.thread_local) {
4673                 var_type = get_tls_type();
4674                 /* LINKAGE_MERGE not supported by current linkers */
4675                 linkage &= ~IR_LINKAGE_MERGE;
4676         }
4677         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4678         irentity = entity->variable.v.entity;
4679         add_entity_linkage(irentity, linkage);
4680         set_entity_visibility(irentity, visibility);
4681 }
4682
4683 static void create_local_declaration(entity_t *entity)
4684 {
4685         assert(is_declaration(entity));
4686
4687         /* construct type */
4688         (void) get_ir_type(entity->declaration.type);
4689         if (entity->base.symbol == NULL) {
4690                 return;
4691         }
4692
4693         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4694         case STORAGE_CLASS_STATIC:
4695                 if (entity->kind == ENTITY_FUNCTION) {
4696                         (void)get_function_entity(entity, NULL);
4697                 } else {
4698                         create_local_static_variable(entity);
4699                 }
4700                 return;
4701         case STORAGE_CLASS_EXTERN:
4702                 if (entity->kind == ENTITY_FUNCTION) {
4703                         assert(entity->function.statement == NULL);
4704                         (void)get_function_entity(entity, NULL);
4705                 } else {
4706                         create_global_variable(entity);
4707                         create_variable_initializer(entity);
4708                 }
4709                 return;
4710         case STORAGE_CLASS_NONE:
4711         case STORAGE_CLASS_AUTO:
4712         case STORAGE_CLASS_REGISTER:
4713                 if (entity->kind == ENTITY_FUNCTION) {
4714                         if (entity->function.statement != NULL) {
4715                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4716                                 (void)get_function_entity(entity, owner);
4717                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4718                                 enqueue_inner_function(entity);
4719                         } else {
4720                                 (void)get_function_entity(entity, NULL);
4721                         }
4722                 } else {
4723                         create_local_variable(entity);
4724                 }
4725                 return;
4726         case STORAGE_CLASS_TYPEDEF:
4727                 break;
4728         }
4729         panic("invalid storage class found");
4730 }
4731
4732 static void initialize_local_declaration(entity_t *entity)
4733 {
4734         if (entity->base.symbol == NULL)
4735                 return;
4736
4737         // no need to emit code in dead blocks
4738         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4739                         && get_cur_block() == NULL)
4740                 return;
4741
4742         switch ((declaration_kind_t) entity->declaration.kind) {
4743         case DECLARATION_KIND_LOCAL_VARIABLE:
4744         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4745                 create_variable_initializer(entity);
4746                 return;
4747
4748         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4749                 allocate_variable_length_array(entity);
4750                 return;
4751
4752         case DECLARATION_KIND_COMPOUND_MEMBER:
4753         case DECLARATION_KIND_GLOBAL_VARIABLE:
4754         case DECLARATION_KIND_FUNCTION:
4755         case DECLARATION_KIND_INNER_FUNCTION:
4756                 return;
4757
4758         case DECLARATION_KIND_PARAMETER:
4759         case DECLARATION_KIND_PARAMETER_ENTITY:
4760                 panic("can't initialize parameters");
4761
4762         case DECLARATION_KIND_UNKNOWN:
4763                 panic("can't initialize unknown declaration");
4764         }
4765         panic("invalid declaration kind");
4766 }
4767
4768 static void declaration_statement_to_firm(declaration_statement_t *statement)
4769 {
4770         entity_t *entity = statement->declarations_begin;
4771         if (entity == NULL)
4772                 return;
4773
4774         entity_t *const last = statement->declarations_end;
4775         for ( ;; entity = entity->base.next) {
4776                 if (is_declaration(entity)) {
4777                         initialize_local_declaration(entity);
4778                 } else if (entity->kind == ENTITY_TYPEDEF) {
4779                         /* §6.7.7:3  Any array size expressions associated with variable length
4780                          * array declarators are evaluated each time the declaration of the
4781                          * typedef name is reached in the order of execution. */
4782                         type_t *const type = skip_typeref(entity->typedefe.type);
4783                         if (is_type_array(type) && type->array.is_vla)
4784                                 get_vla_size(&type->array);
4785                 }
4786                 if (entity == last)
4787                         break;
4788         }
4789 }
4790
4791 static void if_statement_to_firm(if_statement_t *statement)
4792 {
4793         ir_node *cur_block = get_cur_block();
4794
4795         ir_node *fallthrough_block = NULL;
4796
4797         /* the true (blocks) */
4798         ir_node *true_block = NULL;
4799         if (statement->true_statement != NULL) {
4800                 true_block = new_immBlock();
4801                 set_cur_block(true_block);
4802                 statement_to_firm(statement->true_statement);
4803                 if (get_cur_block() != NULL) {
4804                         ir_node *jmp = new_Jmp();
4805                         if (fallthrough_block == NULL)
4806                                 fallthrough_block = new_immBlock();
4807                         add_immBlock_pred(fallthrough_block, jmp);
4808                 }
4809         }
4810
4811         /* the false (blocks) */
4812         ir_node *false_block = NULL;
4813         if (statement->false_statement != NULL) {
4814                 false_block = new_immBlock();
4815                 set_cur_block(false_block);
4816
4817                 statement_to_firm(statement->false_statement);
4818                 if (get_cur_block() != NULL) {
4819                         ir_node *jmp = new_Jmp();
4820                         if (fallthrough_block == NULL)
4821                                 fallthrough_block = new_immBlock();
4822                         add_immBlock_pred(fallthrough_block, jmp);
4823                 }
4824         }
4825
4826         /* create the condition */
4827         if (cur_block != NULL) {
4828                 if (true_block == NULL || false_block == NULL) {
4829                         if (fallthrough_block == NULL)
4830                                 fallthrough_block = new_immBlock();
4831                         if (true_block == NULL)
4832                                 true_block = fallthrough_block;
4833                         if (false_block == NULL)
4834                                 false_block = fallthrough_block;
4835                 }
4836
4837                 set_cur_block(cur_block);
4838                 create_condition_evaluation(statement->condition, true_block,
4839                                             false_block);
4840         }
4841
4842         mature_immBlock(true_block);
4843         if (false_block != fallthrough_block && false_block != NULL) {
4844                 mature_immBlock(false_block);
4845         }
4846         if (fallthrough_block != NULL) {
4847                 mature_immBlock(fallthrough_block);
4848         }
4849
4850         set_cur_block(fallthrough_block);
4851 }
4852
4853 static void while_statement_to_firm(while_statement_t *statement)
4854 {
4855         ir_node *jmp = NULL;
4856         if (get_cur_block() != NULL) {
4857                 jmp = new_Jmp();
4858         }
4859
4860         /* create the header block */
4861         ir_node *header_block = new_immBlock();
4862         if (jmp != NULL) {
4863                 add_immBlock_pred(header_block, jmp);
4864         }
4865
4866         /* the loop body */
4867         ir_node *old_continue_label = continue_label;
4868         ir_node *old_break_label    = break_label;
4869         continue_label              = header_block;
4870         break_label                 = NULL;
4871
4872         ir_node *body_block = new_immBlock();
4873         set_cur_block(body_block);
4874         statement_to_firm(statement->body);
4875         ir_node *false_block = break_label;
4876
4877         assert(continue_label == header_block);
4878         continue_label = old_continue_label;
4879         break_label    = old_break_label;
4880
4881         if (get_cur_block() != NULL) {
4882                 jmp = new_Jmp();
4883                 add_immBlock_pred(header_block, jmp);
4884         }
4885
4886         /* shortcut for while(true) */
4887         if (is_constant_expression(statement->condition)
4888                         && fold_constant_to_bool(statement->condition) != 0) {
4889                 set_cur_block(header_block);
4890                 ir_node *header_jmp = new_Jmp();
4891                 add_immBlock_pred(body_block, header_jmp);
4892
4893                 keep_alive(body_block);
4894                 keep_all_memory(body_block);
4895                 set_cur_block(body_block);
4896         } else {
4897                 if (false_block == NULL) {
4898                         false_block = new_immBlock();
4899                 }
4900
4901                 /* create the condition */
4902                 set_cur_block(header_block);
4903
4904                 create_condition_evaluation(statement->condition, body_block,
4905                                             false_block);
4906         }
4907
4908         mature_immBlock(body_block);
4909         mature_immBlock(header_block);
4910         if (false_block != NULL) {
4911                 mature_immBlock(false_block);
4912         }
4913
4914         set_cur_block(false_block);
4915 }
4916
4917 static void do_while_statement_to_firm(do_while_statement_t *statement)
4918 {
4919         ir_node *jmp = NULL;
4920         if (get_cur_block() != NULL) {
4921                 jmp = new_Jmp();
4922         }
4923
4924         /* create the header block */
4925         ir_node *header_block = new_immBlock();
4926
4927         /* the loop body */
4928         ir_node *body_block = new_immBlock();
4929         if (jmp != NULL) {
4930                 add_immBlock_pred(body_block, jmp);
4931         }
4932
4933         ir_node *old_continue_label = continue_label;
4934         ir_node *old_break_label    = break_label;
4935         continue_label              = header_block;
4936         break_label                 = NULL;
4937
4938         set_cur_block(body_block);
4939         statement_to_firm(statement->body);
4940         ir_node *false_block = break_label;
4941
4942         assert(continue_label == header_block);
4943         continue_label = old_continue_label;
4944         break_label    = old_break_label;
4945
4946         if (get_cur_block() != NULL) {
4947                 ir_node *body_jmp = new_Jmp();
4948                 add_immBlock_pred(header_block, body_jmp);
4949                 mature_immBlock(header_block);
4950         }
4951
4952         if (false_block == NULL) {
4953                 false_block = new_immBlock();
4954         }
4955
4956         /* create the condition */
4957         set_cur_block(header_block);
4958
4959         create_condition_evaluation(statement->condition, body_block, false_block);
4960         mature_immBlock(body_block);
4961         mature_immBlock(header_block);
4962         mature_immBlock(false_block);
4963
4964         set_cur_block(false_block);
4965 }
4966
4967 static void for_statement_to_firm(for_statement_t *statement)
4968 {
4969         ir_node *jmp = NULL;
4970
4971         /* create declarations */
4972         entity_t *entity = statement->scope.entities;
4973         for ( ; entity != NULL; entity = entity->base.next) {
4974                 if (!is_declaration(entity))
4975                         continue;
4976
4977                 create_local_declaration(entity);
4978         }
4979
4980         if (get_cur_block() != NULL) {
4981                 entity = statement->scope.entities;
4982                 for ( ; entity != NULL; entity = entity->base.next) {
4983                         if (!is_declaration(entity))
4984                                 continue;
4985
4986                         initialize_local_declaration(entity);
4987                 }
4988
4989                 if (statement->initialisation != NULL) {
4990                         expression_to_firm(statement->initialisation);
4991                 }
4992
4993                 jmp = new_Jmp();
4994         }
4995
4996
4997         /* create the step block */
4998         ir_node *const step_block = new_immBlock();
4999         set_cur_block(step_block);
5000         if (statement->step != NULL) {
5001                 expression_to_firm(statement->step);
5002         }
5003         ir_node *const step_jmp = new_Jmp();
5004
5005         /* create the header block */
5006         ir_node *const header_block = new_immBlock();
5007         set_cur_block(header_block);
5008         if (jmp != NULL) {
5009                 add_immBlock_pred(header_block, jmp);
5010         }
5011         add_immBlock_pred(header_block, step_jmp);
5012
5013         /* the false block */
5014         ir_node *const false_block = new_immBlock();
5015
5016         /* the loop body */
5017         ir_node *body_block;
5018         if (statement->body != NULL) {
5019                 ir_node *const old_continue_label = continue_label;
5020                 ir_node *const old_break_label    = break_label;
5021                 continue_label = step_block;
5022                 break_label    = false_block;
5023
5024                 body_block = new_immBlock();
5025                 set_cur_block(body_block);
5026                 statement_to_firm(statement->body);
5027
5028                 assert(continue_label == step_block);
5029                 assert(break_label    == false_block);
5030                 continue_label = old_continue_label;
5031                 break_label    = old_break_label;
5032
5033                 if (get_cur_block() != NULL) {
5034                         jmp = new_Jmp();
5035                         add_immBlock_pred(step_block, jmp);
5036                 }
5037         } else {
5038                 body_block = step_block;
5039         }
5040
5041         /* create the condition */
5042         set_cur_block(header_block);
5043         if (statement->condition != NULL) {
5044                 create_condition_evaluation(statement->condition, body_block,
5045                                             false_block);
5046         } else {
5047                 keep_alive(header_block);
5048                 keep_all_memory(header_block);
5049                 jmp = new_Jmp();
5050                 add_immBlock_pred(body_block, jmp);
5051         }
5052
5053         mature_immBlock(body_block);
5054         mature_immBlock(false_block);
5055         mature_immBlock(step_block);
5056         mature_immBlock(header_block);
5057         mature_immBlock(false_block);
5058
5059         set_cur_block(false_block);
5060 }
5061
5062 static void create_jump_statement(const statement_t *statement,
5063                                   ir_node *target_block)
5064 {
5065         if (get_cur_block() == NULL)
5066                 return;
5067
5068         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5069         ir_node  *jump = new_d_Jmp(dbgi);
5070         add_immBlock_pred(target_block, jump);
5071
5072         set_cur_block(NULL);
5073 }
5074
5075 static ir_node *get_break_label(void)
5076 {
5077         if (break_label == NULL) {
5078                 break_label = new_immBlock();
5079         }
5080         return break_label;
5081 }
5082
5083 static void switch_statement_to_firm(switch_statement_t *statement)
5084 {
5085         ir_node  *first_block = NULL;
5086         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
5087         ir_node  *cond        = NULL;
5088
5089         if (get_cur_block() != NULL) {
5090                 ir_node *expression = expression_to_firm(statement->expression);
5091                 cond                = new_d_Cond(dbgi, expression);
5092                 first_block         = get_cur_block();
5093         }
5094
5095         set_cur_block(NULL);
5096
5097         ir_node *const old_switch_cond       = current_switch_cond;
5098         ir_node *const old_break_label       = break_label;
5099         const bool     old_saw_default_label = saw_default_label;
5100         saw_default_label                    = false;
5101         current_switch_cond                  = cond;
5102         break_label                          = NULL;
5103         switch_statement_t *const old_switch = current_switch;
5104         current_switch                       = statement;
5105
5106         /* determine a free number for the default label */
5107         unsigned long num_cases = 0;
5108         long def_nr = 0;
5109         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5110                 if (l->expression == NULL) {
5111                         /* default case */
5112                         continue;
5113                 }
5114                 if (l->last_case >= l->first_case)
5115                         num_cases += l->last_case - l->first_case + 1;
5116                 if (l->last_case > def_nr)
5117                         def_nr = l->last_case;
5118         }
5119
5120         if (def_nr == INT_MAX) {
5121                 /* Bad: an overflow will occur, we cannot be sure that the
5122                  * maximum + 1 is a free number. Scan the values a second
5123                  * time to find a free number.
5124                  */
5125                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5126
5127                 memset(bits, 0, (num_cases + 7) >> 3);
5128                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5129                         if (l->expression == NULL) {
5130                                 /* default case */
5131                                 continue;
5132                         }
5133                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5134                         if (start < num_cases && l->last_case >= 0) {
5135                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5136                                         (unsigned long)l->last_case : num_cases - 1;
5137                                 for (unsigned long cns = start; cns <= end; ++cns) {
5138                                         bits[cns >> 3] |= (1 << (cns & 7));
5139                                 }
5140                         }
5141                 }
5142                 /* We look at the first num_cases constants:
5143                  * Either they are dense, so we took the last (num_cases)
5144                  * one, or they are not dense, so we will find one free
5145                  * there...
5146                  */
5147                 unsigned long i;
5148                 for (i = 0; i < num_cases; ++i)
5149                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5150                                 break;
5151
5152                 free(bits);
5153                 def_nr = i;
5154         } else {
5155                 ++def_nr;
5156         }
5157         statement->default_proj_nr = def_nr;
5158
5159         if (statement->body != NULL) {
5160                 statement_to_firm(statement->body);
5161         }
5162
5163         if (get_cur_block() != NULL) {
5164                 ir_node *jmp = new_Jmp();
5165                 add_immBlock_pred(get_break_label(), jmp);
5166         }
5167
5168         if (!saw_default_label && first_block != NULL) {
5169                 set_cur_block(first_block);
5170                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
5171                                                         statement->default_proj_nr);
5172                 add_immBlock_pred(get_break_label(), proj);
5173         }
5174
5175         if (break_label != NULL) {
5176                 mature_immBlock(break_label);
5177         }
5178         set_cur_block(break_label);
5179
5180         assert(current_switch_cond == cond);
5181         current_switch      = old_switch;
5182         current_switch_cond = old_switch_cond;
5183         break_label         = old_break_label;
5184         saw_default_label   = old_saw_default_label;
5185 }
5186
5187 static void case_label_to_firm(const case_label_statement_t *statement)
5188 {
5189         if (statement->is_empty_range)
5190                 return;
5191
5192         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5193
5194         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5195
5196         ir_node *proj;
5197         ir_node *block = new_immBlock();
5198
5199         if (current_switch_cond != NULL) {
5200                 set_cur_block(get_nodes_block(current_switch_cond));
5201                 if (statement->expression != NULL) {
5202                         long pn     = statement->first_case;
5203                         long end_pn = statement->last_case;
5204                         assert(pn <= end_pn);
5205                         /* create jumps for all cases in the given range */
5206                         do {
5207                                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5208                                 add_immBlock_pred(block, proj);
5209                         } while (pn++ < end_pn);
5210                 } else {
5211                         saw_default_label = true;
5212                         proj = new_d_defaultProj(dbgi, current_switch_cond,
5213                                                                          current_switch->default_proj_nr);
5214
5215                         add_immBlock_pred(block, proj);
5216                 }
5217         }
5218
5219         if (fallthrough != NULL) {
5220                 add_immBlock_pred(block, fallthrough);
5221         }
5222         mature_immBlock(block);
5223         set_cur_block(block);
5224
5225         if (statement->statement != NULL) {
5226                 statement_to_firm(statement->statement);
5227         }
5228 }
5229
5230 static void label_to_firm(const label_statement_t *statement)
5231 {
5232         ir_node *block = get_label_block(statement->label);
5233
5234         if (get_cur_block() != NULL) {
5235                 ir_node *jmp = new_Jmp();
5236                 add_immBlock_pred(block, jmp);
5237         }
5238
5239         set_cur_block(block);
5240         keep_alive(block);
5241         keep_all_memory(block);
5242
5243         if (statement->statement != NULL) {
5244                 statement_to_firm(statement->statement);
5245         }
5246 }
5247
5248 static void goto_to_firm(const goto_statement_t *statement)
5249 {
5250         if (get_cur_block() == NULL)
5251                 return;
5252
5253         if (statement->expression) {
5254                 ir_node  *irn  = expression_to_firm(statement->expression);
5255                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5256                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5257
5258                 set_irn_link(ijmp, ijmp_list);
5259                 ijmp_list = ijmp;
5260         } else {
5261                 ir_node *block = get_label_block(statement->label);
5262                 ir_node *jmp   = new_Jmp();
5263                 add_immBlock_pred(block, jmp);
5264         }
5265         set_cur_block(NULL);
5266 }
5267
5268 static void asm_statement_to_firm(const asm_statement_t *statement)
5269 {
5270         bool needs_memory = false;
5271
5272         if (statement->is_volatile) {
5273                 needs_memory = true;
5274         }
5275
5276         size_t         n_clobbers = 0;
5277         asm_clobber_t *clobber    = statement->clobbers;
5278         for ( ; clobber != NULL; clobber = clobber->next) {
5279                 const char *clobber_str = clobber->clobber.begin;
5280
5281                 if (!be_is_valid_clobber(clobber_str)) {
5282                         errorf(&statement->base.source_position,
5283                                    "invalid clobber '%s' specified", clobber->clobber);
5284                         continue;
5285                 }
5286
5287                 if (strcmp(clobber_str, "memory") == 0) {
5288                         needs_memory = true;
5289                         continue;
5290                 }
5291
5292                 ident *id = new_id_from_str(clobber_str);
5293                 obstack_ptr_grow(&asm_obst, id);
5294                 ++n_clobbers;
5295         }
5296         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5297         ident **clobbers = NULL;
5298         if (n_clobbers > 0) {
5299                 clobbers = obstack_finish(&asm_obst);
5300         }
5301
5302         size_t n_inputs  = 0;
5303         asm_argument_t *argument = statement->inputs;
5304         for ( ; argument != NULL; argument = argument->next)
5305                 n_inputs++;
5306         size_t n_outputs = 0;
5307         argument = statement->outputs;
5308         for ( ; argument != NULL; argument = argument->next)
5309                 n_outputs++;
5310
5311         unsigned next_pos = 0;
5312
5313         ir_node *ins[n_inputs + n_outputs + 1];
5314         size_t   in_size = 0;
5315
5316         ir_asm_constraint tmp_in_constraints[n_outputs];
5317
5318         const expression_t *out_exprs[n_outputs];
5319         ir_node            *out_addrs[n_outputs];
5320         size_t              out_size = 0;
5321
5322         argument = statement->outputs;
5323         for ( ; argument != NULL; argument = argument->next) {
5324                 const char *constraints = argument->constraints.begin;
5325                 asm_constraint_flags_t asm_flags
5326                         = be_parse_asm_constraints(constraints);
5327
5328                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5329                         warningf(&statement->base.source_position,
5330                                "some constraints in '%s' are not supported", constraints);
5331                 }
5332                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5333                         errorf(&statement->base.source_position,
5334                                "some constraints in '%s' are invalid", constraints);
5335                         continue;
5336                 }
5337                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5338                         errorf(&statement->base.source_position,
5339                                "no write flag specified for output constraints '%s'",
5340                                constraints);
5341                         continue;
5342                 }
5343
5344                 unsigned pos = next_pos++;
5345                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5346                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5347                         expression_t *expr = argument->expression;
5348                         ir_node      *addr = expression_to_addr(expr);
5349                         /* in+output, construct an artifical same_as constraint on the
5350                          * input */
5351                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5352                                 char     buf[64];
5353                                 ir_node *value = get_value_from_lvalue(expr, addr);
5354
5355                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5356
5357                                 ir_asm_constraint constraint;
5358                                 constraint.pos              = pos;
5359                                 constraint.constraint       = new_id_from_str(buf);
5360                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5361                                 tmp_in_constraints[in_size] = constraint;
5362                                 ins[in_size] = value;
5363
5364                                 ++in_size;
5365                         }
5366
5367                         out_exprs[out_size] = expr;
5368                         out_addrs[out_size] = addr;
5369                         ++out_size;
5370                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5371                         /* pure memory ops need no input (but we have to make sure we
5372                          * attach to the memory) */
5373                         assert(! (asm_flags &
5374                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5375                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5376                         needs_memory = true;
5377
5378                         /* we need to attach the address to the inputs */
5379                         expression_t *expr = argument->expression;
5380
5381                         ir_asm_constraint constraint;
5382                         constraint.pos              = pos;
5383                         constraint.constraint       = new_id_from_str(constraints);
5384                         constraint.mode             = NULL;
5385                         tmp_in_constraints[in_size] = constraint;
5386
5387                         ins[in_size]          = expression_to_addr(expr);
5388                         ++in_size;
5389                         continue;
5390                 } else {
5391                         errorf(&statement->base.source_position,
5392                                "only modifiers but no place set in constraints '%s'",
5393                                constraints);
5394                         continue;
5395                 }
5396
5397                 ir_asm_constraint constraint;
5398                 constraint.pos        = pos;
5399                 constraint.constraint = new_id_from_str(constraints);
5400                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5401
5402                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5403         }
5404         assert(obstack_object_size(&asm_obst)
5405                         == out_size * sizeof(ir_asm_constraint));
5406         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5407
5408
5409         obstack_grow(&asm_obst, tmp_in_constraints,
5410                      in_size * sizeof(tmp_in_constraints[0]));
5411         /* find and count input and output arguments */
5412         argument = statement->inputs;
5413         for ( ; argument != NULL; argument = argument->next) {
5414                 const char *constraints = argument->constraints.begin;
5415                 asm_constraint_flags_t asm_flags
5416                         = be_parse_asm_constraints(constraints);
5417
5418                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5419                         errorf(&statement->base.source_position,
5420                                "some constraints in '%s' are not supported", constraints);
5421                         continue;
5422                 }
5423                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5424                         errorf(&statement->base.source_position,
5425                                "some constraints in '%s' are invalid", constraints);
5426                         continue;
5427                 }
5428                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5429                         errorf(&statement->base.source_position,
5430                                "write flag specified for input constraints '%s'",
5431                                constraints);
5432                         continue;
5433                 }
5434
5435                 ir_node *input;
5436                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5437                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5438                         /* we can treat this as "normal" input */
5439                         input = expression_to_firm(argument->expression);
5440                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5441                         /* pure memory ops need no input (but we have to make sure we
5442                          * attach to the memory) */
5443                         assert(! (asm_flags &
5444                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5445                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5446                         needs_memory = true;
5447                         input = expression_to_addr(argument->expression);
5448                 } else {
5449                         errorf(&statement->base.source_position,
5450                                "only modifiers but no place set in constraints '%s'",
5451                                constraints);
5452                         continue;
5453                 }
5454
5455                 ir_asm_constraint constraint;
5456                 constraint.pos        = next_pos++;
5457                 constraint.constraint = new_id_from_str(constraints);
5458                 constraint.mode       = get_irn_mode(input);
5459
5460                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5461                 ins[in_size++] = input;
5462         }
5463
5464         if (needs_memory) {
5465                 ir_asm_constraint constraint;
5466                 constraint.pos        = next_pos++;
5467                 constraint.constraint = new_id_from_str("");
5468                 constraint.mode       = mode_M;
5469
5470                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5471                 ins[in_size++] = get_store();
5472         }
5473
5474         assert(obstack_object_size(&asm_obst)
5475                         == in_size * sizeof(ir_asm_constraint));
5476         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5477
5478         /* create asm node */
5479         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5480
5481         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5482
5483         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5484                                   out_size, output_constraints,
5485                                   n_clobbers, clobbers, asm_text);
5486
5487         if (statement->is_volatile) {
5488                 set_irn_pinned(node, op_pin_state_pinned);
5489         } else {
5490                 set_irn_pinned(node, op_pin_state_floats);
5491         }
5492
5493         /* create output projs & connect them */
5494         if (needs_memory) {
5495                 ir_node *projm = new_Proj(node, mode_M, out_size);
5496                 set_store(projm);
5497         }
5498
5499         size_t i;
5500         for (i = 0; i < out_size; ++i) {
5501                 const expression_t *out_expr = out_exprs[i];
5502                 long                pn       = i;
5503                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5504                 ir_node            *proj     = new_Proj(node, mode, pn);
5505                 ir_node            *addr     = out_addrs[i];
5506
5507                 set_value_for_expression_addr(out_expr, proj, addr);
5508         }
5509 }
5510
5511 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5512 {
5513         statement_to_firm(statement->try_statement);
5514         warningf(&statement->base.source_position, "structured exception handling ignored");
5515 }
5516
5517 static void     leave_statement_to_firm(leave_statement_t *statement)
5518 {
5519         errorf(&statement->base.source_position, "__leave not supported yet");
5520 }
5521
5522 /**
5523  * Transform a statement.
5524  */
5525 static void statement_to_firm(statement_t *statement)
5526 {
5527 #ifndef NDEBUG
5528         assert(!statement->base.transformed);
5529         statement->base.transformed = true;
5530 #endif
5531
5532         switch (statement->kind) {
5533         case STATEMENT_INVALID:
5534                 panic("invalid statement found");
5535         case STATEMENT_EMPTY:
5536                 /* nothing */
5537                 return;
5538         case STATEMENT_COMPOUND:
5539                 compound_statement_to_firm(&statement->compound);
5540                 return;
5541         case STATEMENT_RETURN:
5542                 return_statement_to_firm(&statement->returns);
5543                 return;
5544         case STATEMENT_EXPRESSION:
5545                 expression_statement_to_firm(&statement->expression);
5546                 return;
5547         case STATEMENT_IF:
5548                 if_statement_to_firm(&statement->ifs);
5549                 return;
5550         case STATEMENT_WHILE:
5551                 while_statement_to_firm(&statement->whiles);
5552                 return;
5553         case STATEMENT_DO_WHILE:
5554                 do_while_statement_to_firm(&statement->do_while);
5555                 return;
5556         case STATEMENT_DECLARATION:
5557                 declaration_statement_to_firm(&statement->declaration);
5558                 return;
5559         case STATEMENT_BREAK:
5560                 create_jump_statement(statement, get_break_label());
5561                 return;
5562         case STATEMENT_CONTINUE:
5563                 create_jump_statement(statement, continue_label);
5564                 return;
5565         case STATEMENT_SWITCH:
5566                 switch_statement_to_firm(&statement->switchs);
5567                 return;
5568         case STATEMENT_CASE_LABEL:
5569                 case_label_to_firm(&statement->case_label);
5570                 return;
5571         case STATEMENT_FOR:
5572                 for_statement_to_firm(&statement->fors);
5573                 return;
5574         case STATEMENT_LABEL:
5575                 label_to_firm(&statement->label);
5576                 return;
5577         case STATEMENT_GOTO:
5578                 goto_to_firm(&statement->gotos);
5579                 return;
5580         case STATEMENT_ASM:
5581                 asm_statement_to_firm(&statement->asms);
5582                 return;
5583         case STATEMENT_MS_TRY:
5584                 ms_try_statement_to_firm(&statement->ms_try);
5585                 return;
5586         case STATEMENT_LEAVE:
5587                 leave_statement_to_firm(&statement->leave);
5588                 return;
5589         }
5590         panic("statement not implemented");
5591 }
5592
5593 static int count_local_variables(const entity_t *entity,
5594                                  const entity_t *const last)
5595 {
5596         int count = 0;
5597         entity_t const *const end = last != NULL ? last->base.next : NULL;
5598         for (; entity != end; entity = entity->base.next) {
5599                 type_t *type;
5600                 bool    address_taken;
5601
5602                 if (entity->kind == ENTITY_VARIABLE) {
5603                         type          = skip_typeref(entity->declaration.type);
5604                         address_taken = entity->variable.address_taken;
5605                 } else if (entity->kind == ENTITY_PARAMETER) {
5606                         type          = skip_typeref(entity->declaration.type);
5607                         address_taken = entity->parameter.address_taken;
5608                 } else {
5609                         continue;
5610                 }
5611
5612                 if (!address_taken && is_type_scalar(type))
5613                         ++count;
5614         }
5615         return count;
5616 }
5617
5618 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5619 {
5620         int *const count = env;
5621
5622         switch (stmt->kind) {
5623         case STATEMENT_DECLARATION: {
5624                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5625                 *count += count_local_variables(decl_stmt->declarations_begin,
5626                                 decl_stmt->declarations_end);
5627                 break;
5628         }
5629
5630         case STATEMENT_FOR:
5631                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5632                 break;
5633
5634         default:
5635                 break;
5636         }
5637 }
5638
5639 /**
5640  * Return the number of local (alias free) variables used by a function.
5641  */
5642 static int get_function_n_local_vars(entity_t *entity)
5643 {
5644         const function_t *function = &entity->function;
5645         int count = 0;
5646
5647         /* count parameters */
5648         count += count_local_variables(function->parameters.entities, NULL);
5649
5650         /* count local variables declared in body */
5651         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5652         return count;
5653 }
5654
5655 /**
5656  * Build Firm code for the parameters of a function.
5657  */
5658 static void initialize_function_parameters(entity_t *entity)
5659 {
5660         assert(entity->kind == ENTITY_FUNCTION);
5661         ir_graph *irg             = current_ir_graph;
5662         ir_node  *args            = get_irg_args(irg);
5663         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5664         int      first_param_nr   = 0;
5665
5666         if (entity->function.need_closure) {
5667                 /* add an extra parameter for the static link */
5668                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5669                 ++first_param_nr;
5670         }
5671
5672         int       n         = 0;
5673         entity_t *parameter = entity->function.parameters.entities;
5674         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5675                 if (parameter->kind != ENTITY_PARAMETER)
5676                         continue;
5677
5678                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5679                 type_t *type = skip_typeref(parameter->declaration.type);
5680
5681                 bool needs_entity = parameter->parameter.address_taken;
5682                 assert(!is_type_array(type));
5683                 if (is_type_compound(type)) {
5684                         needs_entity = true;
5685                 }
5686
5687                 if (needs_entity) {
5688                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5689                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5690                         set_entity_ident(entity, id);
5691
5692                         parameter->declaration.kind
5693                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5694                         parameter->parameter.v.entity = entity;
5695                         continue;
5696                 }
5697
5698                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5699                 ir_mode *param_mode   = get_type_mode(param_irtype);
5700
5701                 long     pn    = n + first_param_nr;
5702                 ir_node *value = new_r_Proj(args, param_mode, pn);
5703
5704                 ir_mode *mode = get_ir_mode_storage(type);
5705                 value = create_conv(NULL, value, mode);
5706                 value = do_strict_conv(NULL, value);
5707
5708                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5709                 parameter->parameter.v.value_number = next_value_number_function;
5710                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5711                                         parameter);
5712                 ++next_value_number_function;
5713
5714                 set_value(parameter->parameter.v.value_number, value);
5715         }
5716 }
5717
5718 /**
5719  * Handle additional decl modifiers for IR-graphs
5720  *
5721  * @param irg            the IR-graph
5722  * @param dec_modifiers  additional modifiers
5723  */
5724 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5725                                      decl_modifiers_t decl_modifiers)
5726 {
5727         if (decl_modifiers & DM_RETURNS_TWICE) {
5728                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5729                 set_irg_additional_property(irg, mtp_property_returns_twice);
5730         }
5731         if (decl_modifiers & DM_NORETURN) {
5732                 /* TRUE if the declaration includes the Microsoft
5733                    __declspec(noreturn) specifier. */
5734                 set_irg_additional_property(irg, mtp_property_noreturn);
5735         }
5736         if (decl_modifiers & DM_NOTHROW) {
5737                 /* TRUE if the declaration includes the Microsoft
5738                    __declspec(nothrow) specifier. */
5739                 set_irg_additional_property(irg, mtp_property_nothrow);
5740         }
5741         if (decl_modifiers & DM_NAKED) {
5742                 /* TRUE if the declaration includes the Microsoft
5743                    __declspec(naked) specifier. */
5744                 set_irg_additional_property(irg, mtp_property_naked);
5745         }
5746         if (decl_modifiers & DM_FORCEINLINE) {
5747                 /* TRUE if the declaration includes the
5748                    Microsoft __forceinline specifier. */
5749                 set_irg_inline_property(irg, irg_inline_forced);
5750         }
5751         if (decl_modifiers & DM_NOINLINE) {
5752                 /* TRUE if the declaration includes the Microsoft
5753                    __declspec(noinline) specifier. */
5754                 set_irg_inline_property(irg, irg_inline_forbidden);
5755         }
5756 }
5757
5758 static void add_function_pointer(ir_type *segment, ir_entity *method,
5759                                  const char *unique_template)
5760 {
5761         ir_type   *method_type  = get_entity_type(method);
5762         ir_type   *ptr_type     = new_type_pointer(method_type);
5763
5764         /* these entities don't really have a name but firm only allows
5765          * "" in ld_ident.
5766          * Note that we mustn't give these entities a name since for example
5767          * Mach-O doesn't allow them. */
5768         ident     *ide          = id_unique(unique_template);
5769         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5770         ir_graph  *irg          = get_const_code_irg();
5771         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5772                                                            method, NULL);
5773
5774         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5775         set_entity_compiler_generated(ptr, 1);
5776         set_entity_visibility(ptr, ir_visibility_local);
5777         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5778         set_atomic_ent_value(ptr, val);
5779 }
5780
5781 /**
5782  * Generate possible IJmp branches to a given label block.
5783  */
5784 static void gen_ijmp_branches(ir_node *block)
5785 {
5786         ir_node *ijmp;
5787         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5788                 add_immBlock_pred(block, ijmp);
5789         }
5790 }
5791
5792 /**
5793  * Create code for a function and all inner functions.
5794  *
5795  * @param entity  the function entity
5796  */
5797 static void create_function(entity_t *entity)
5798 {
5799         assert(entity->kind == ENTITY_FUNCTION);
5800         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5801
5802         if (entity->function.statement == NULL)
5803                 return;
5804
5805         if (is_main(entity) && firm_opt.os_support == OS_SUPPORT_MINGW) {
5806                 prepare_main_collect2(entity);
5807         }
5808
5809         inner_functions     = NULL;
5810         current_trampolines = NULL;
5811
5812         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5813                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5814                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5815         }
5816         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5817                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5818                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5819         }
5820
5821         current_function_entity = entity;
5822         current_function_name   = NULL;
5823         current_funcsig         = NULL;
5824
5825         assert(all_labels == NULL);
5826         all_labels = NEW_ARR_F(label_t *, 0);
5827         ijmp_list  = NULL;
5828
5829         int       n_local_vars = get_function_n_local_vars(entity);
5830         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5831
5832         ir_graph *old_current_function = current_function;
5833         current_function = irg;
5834
5835         set_irg_fp_model(irg, firm_opt.fp_model);
5836         tarval_enable_fp_ops(1);
5837         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5838
5839         ir_node *first_block = get_cur_block();
5840
5841         /* set inline flags */
5842         if (entity->function.is_inline)
5843                 set_irg_inline_property(irg, irg_inline_recomended);
5844         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5845
5846         next_value_number_function = 0;
5847         initialize_function_parameters(entity);
5848         current_static_link = entity->function.static_link;
5849
5850         statement_to_firm(entity->function.statement);
5851
5852         ir_node *end_block = get_irg_end_block(irg);
5853
5854         /* do we have a return statement yet? */
5855         if (get_cur_block() != NULL) {
5856                 type_t *type = skip_typeref(entity->declaration.type);
5857                 assert(is_type_function(type));
5858                 const function_type_t *func_type   = &type->function;
5859                 const type_t          *return_type
5860                         = skip_typeref(func_type->return_type);
5861
5862                 ir_node *ret;
5863                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5864                         ret = new_Return(get_store(), 0, NULL);
5865                 } else {
5866                         ir_mode *mode;
5867                         if (is_type_scalar(return_type)) {
5868                                 mode = get_ir_mode_storage(func_type->return_type);
5869                         } else {
5870                                 mode = mode_P_data;
5871                         }
5872
5873                         ir_node *in[1];
5874                         /* §5.1.2.2.3 main implicitly returns 0 */
5875                         if (is_main(entity)) {
5876                                 in[0] = new_Const(get_mode_null(mode));
5877                         } else {
5878                                 in[0] = new_Unknown(mode);
5879                         }
5880                         ret = new_Return(get_store(), 1, in);
5881                 }
5882                 add_immBlock_pred(end_block, ret);
5883         }
5884
5885         bool has_computed_gotos = false;
5886         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5887                 label_t *label = all_labels[i];
5888                 if (label->address_taken) {
5889                         gen_ijmp_branches(label->block);
5890                         has_computed_gotos = true;
5891                 }
5892                 mature_immBlock(label->block);
5893         }
5894         if (has_computed_gotos) {
5895                 /* if we have computed goto's in the function, we cannot inline it */
5896                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5897                         warningf(&entity->base.source_position,
5898                                  "function '%Y' can never be inlined because it contains a computed goto",
5899                                  entity->base.symbol);
5900                 }
5901                 set_irg_inline_property(irg, irg_inline_forbidden);
5902         }
5903
5904         DEL_ARR_F(all_labels);
5905         all_labels = NULL;
5906
5907         mature_immBlock(first_block);
5908         mature_immBlock(end_block);
5909
5910         irg_finalize_cons(irg);
5911
5912         /* finalize the frame type */
5913         ir_type *frame_type = get_irg_frame_type(irg);
5914         int      n          = get_compound_n_members(frame_type);
5915         int      align_all  = 4;
5916         int      offset     = 0;
5917         for (int i = 0; i < n; ++i) {
5918                 ir_entity *entity      = get_compound_member(frame_type, i);
5919                 ir_type   *entity_type = get_entity_type(entity);
5920
5921                 int align = get_type_alignment_bytes(entity_type);
5922                 if (align > align_all)
5923                         align_all = align;
5924                 int misalign = 0;
5925                 if (align > 0) {
5926                         misalign  = offset % align;
5927                         if (misalign > 0) {
5928                                 offset += align - misalign;
5929                         }
5930                 }
5931
5932                 set_entity_offset(entity, offset);
5933                 offset += get_type_size_bytes(entity_type);
5934         }
5935         set_type_size_bytes(frame_type, offset);
5936         set_type_alignment_bytes(frame_type, align_all);
5937
5938         irg_verify(irg, VERIFY_ENFORCE_SSA);
5939         current_function = old_current_function;
5940
5941         if (current_trampolines != NULL) {
5942                 DEL_ARR_F(current_trampolines);
5943                 current_trampolines = NULL;
5944         }
5945
5946         /* create inner functions if any */
5947         entity_t **inner = inner_functions;
5948         if (inner != NULL) {
5949                 ir_type *rem_outer_frame      = current_outer_frame;
5950                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5951                 ir_type *rem_outer_value_type = current_outer_value_type;
5952                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5953                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5954                         create_function(inner[i]);
5955                 }
5956                 DEL_ARR_F(inner);
5957
5958                 current_outer_value_type = rem_outer_value_type;
5959                 current_outer_frame      = rem_outer_frame;
5960         }
5961 }
5962
5963 static void scope_to_firm(scope_t *scope)
5964 {
5965         /* first pass: create declarations */
5966         entity_t *entity = scope->entities;
5967         for ( ; entity != NULL; entity = entity->base.next) {
5968                 if (entity->base.symbol == NULL)
5969                         continue;
5970
5971                 if (entity->kind == ENTITY_FUNCTION) {
5972                         if (entity->function.btk != bk_none) {
5973                                 /* builtins have no representation */
5974                                 continue;
5975                         }
5976                         (void)get_function_entity(entity, NULL);
5977                 } else if (entity->kind == ENTITY_VARIABLE) {
5978                         create_global_variable(entity);
5979                 } else if (entity->kind == ENTITY_NAMESPACE) {
5980                         scope_to_firm(&entity->namespacee.members);
5981                 }
5982         }
5983
5984         /* second pass: create code/initializers */
5985         entity = scope->entities;
5986         for ( ; entity != NULL; entity = entity->base.next) {
5987                 if (entity->base.symbol == NULL)
5988                         continue;
5989
5990                 if (entity->kind == ENTITY_FUNCTION) {
5991                         if (entity->function.btk != bk_none) {
5992                                 /* builtins have no representation */
5993                                 continue;
5994                         }
5995                         create_function(entity);
5996                 } else if (entity->kind == ENTITY_VARIABLE) {
5997                         assert(entity->declaration.kind
5998                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5999                         current_ir_graph = get_const_code_irg();
6000                         create_variable_initializer(entity);
6001                 }
6002         }
6003 }
6004
6005 void init_ast2firm(void)
6006 {
6007         obstack_init(&asm_obst);
6008         init_atomic_modes();
6009
6010         ir_set_debug_retrieve(dbg_retrieve);
6011         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6012
6013         /* OS option must be set to the backend */
6014         switch (firm_opt.os_support) {
6015         case OS_SUPPORT_MINGW:
6016                 create_ld_ident = create_name_win32;
6017                 break;
6018         case OS_SUPPORT_LINUX:
6019                 create_ld_ident = create_name_linux_elf;
6020                 break;
6021         case OS_SUPPORT_MACHO:
6022                 create_ld_ident = create_name_macho;
6023                 break;
6024         default:
6025                 panic("unexpected OS support mode");
6026         }
6027
6028         /* create idents for all known runtime functions */
6029         for (size_t i = 0; i < lengthof(rts_data); ++i) {
6030                 rts_idents[i] = new_id_from_str(rts_data[i].name);
6031         }
6032
6033         entitymap_init(&entitymap);
6034 }
6035
6036 static void init_ir_types(void)
6037 {
6038         static int ir_types_initialized = 0;
6039         if (ir_types_initialized)
6040                 return;
6041         ir_types_initialized = 1;
6042
6043         ir_type_int        = get_ir_type(type_int);
6044         ir_type_char       = get_ir_type(type_char);
6045         ir_type_const_char = get_ir_type(type_const_char);
6046         ir_type_wchar_t    = get_ir_type(type_wchar_t);
6047         ir_type_void       = get_ir_type(type_void);
6048
6049         be_params             = be_get_backend_param();
6050         mode_float_arithmetic = be_params->mode_float_arithmetic;
6051
6052         stack_param_align     = be_params->stack_param_align;
6053 }
6054
6055 void exit_ast2firm(void)
6056 {
6057         entitymap_destroy(&entitymap);
6058         obstack_free(&asm_obst, NULL);
6059 }
6060
6061 static void global_asm_to_firm(statement_t *s)
6062 {
6063         for (; s != NULL; s = s->base.next) {
6064                 assert(s->kind == STATEMENT_ASM);
6065
6066                 char const *const text = s->asms.asm_text.begin;
6067                 size_t            size = s->asms.asm_text.size;
6068
6069                 /* skip the last \0 */
6070                 if (text[size - 1] == '\0')
6071                         --size;
6072
6073                 ident *const id = new_id_from_chars(text, size);
6074                 add_irp_asm(id);
6075         }
6076 }
6077
6078 void translation_unit_to_firm(translation_unit_t *unit)
6079 {
6080         /* initialize firm arithmetic */
6081         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6082         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6083
6084         /* just to be sure */
6085         continue_label           = NULL;
6086         break_label              = NULL;
6087         current_switch_cond      = NULL;
6088         current_translation_unit = unit;
6089
6090         init_ir_types();
6091
6092         scope_to_firm(&unit->scope);
6093         global_asm_to_firm(unit->global_asm);
6094
6095         current_ir_graph         = NULL;
6096         current_translation_unit = NULL;
6097 }