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 <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "jump_target.h"
  39 #include "symbol_t.h"
  40 #include "token_t.h"
  41 #include "type_t.h"
  42 #include "ast_t.h"
  43 #include "entity_t.h"
  44 #include "parser.h"
  45 #include "diagnostic.h"
  46 #include "lang_features.h"
  47 #include "types.h"
  48 #include "type_hash.h"
  49 #include "mangle.h"
  50 #include "walk.h"
  51 #include "warning.h"
  52 #include "printer.h"
  53 #include "entitymap_t.h"
  54 #include "driver/firm_opt.h"
  55
  56 typedef struct trampoline_region trampoline_region;
  57 struct trampoline_region {
  58         ir_entity        *function;    /**< The function that is called by this trampoline */
  59         ir_entity        *region;      /**< created region for the trampoline */
  60 };
  61
  62 typedef struct complex_value {
  63         ir_node *real;
  64         ir_node *imag;
  65 } complex_value;
  66
  67 typedef struct complex_constant {
  68         ir_tarval *real;
  69         ir_tarval *imag;
  70 } complex_constant;
  71
  72 fp_model_t firm_fp_model = fp_model_precise;
  73
  74 static const backend_params *be_params;
  75
  76 static ir_type *ir_type_char;
  77
  78 /* architecture specific floating point arithmetic mode (if any) */
  79 static ir_mode *mode_float_arithmetic;
  80
  81 /* alignment of stack parameters */
  82 static unsigned stack_param_align;
  83
  84 static int         next_value_number_function;
  85 static jump_target continue_target;
  86 static jump_target break_target;
  87 static ir_node    *current_switch;
  88 static bool        saw_default_label;
  89 static entity_t  **inner_functions;
  90 static jump_target ijmp_target;
  91 static ir_node   **ijmp_ops;
  92 static ir_node   **ijmp_blocks;
  93 static bool        constant_folding;
  94
  95 #define PUSH_BREAK(val) \
  96         jump_target const old_break_target = break_target; \
  97         (init_jump_target(&break_target, (val)))
  98 #define POP_BREAK() \
  99         ((void)(break_target = old_break_target))
 100
 101 #define PUSH_CONTINUE(val) \
 102         jump_target const old_continue_target = continue_target; \
 103         (init_jump_target(&continue_target, (val)))
 104 #define POP_CONTINUE() \
 105         ((void)(continue_target = old_continue_target))
 106
 107 #define PUSH_IRG(val) \
 108         ir_graph *const old_irg = current_ir_graph; \
 109         ir_graph *const new_irg = (val); \
 110         ((void)(current_ir_graph = new_irg))
 111
 112 #define POP_IRG() \
 113         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
 114
 115 static const entity_t     *current_function_entity;
 116 static ir_node            *current_function_name;
 117 static ir_node            *current_funcsig;
 118 static ir_graph           *current_function;
 119 static translation_unit_t *current_translation_unit;
 120 static trampoline_region  *current_trampolines;
 121 static ir_type            *current_outer_frame;
 122 static ir_node            *current_static_link;
 123 static ir_entity          *current_vararg_entity;
 124
 125 static entitymap_t  entitymap;
 126
 127 static struct obstack asm_obst;
 128
 129 typedef enum declaration_kind_t {
 130         DECLARATION_KIND_UNKNOWN,
 131         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 132         DECLARATION_KIND_GLOBAL_VARIABLE,
 133         DECLARATION_KIND_LOCAL_VARIABLE,
 134         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 135         DECLARATION_KIND_PARAMETER,
 136         DECLARATION_KIND_PARAMETER_ENTITY,
 137         DECLARATION_KIND_FUNCTION,
 138         DECLARATION_KIND_COMPOUND_MEMBER,
 139         DECLARATION_KIND_INNER_FUNCTION
 140 } declaration_kind_t;
 141
 142 static ir_type *get_ir_type_incomplete(type_t *type);
 143
 144 static void enqueue_inner_function(entity_t *entity)
 145 {
 146         if (inner_functions == NULL)
 147                 inner_functions = NEW_ARR_F(entity_t *, 0);
 148         ARR_APP1(entity_t*, inner_functions, entity);
 149 }
 150
 151 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 152 {
 153         const entity_t *entity = get_irg_loc_description(irg, pos);
 154
 155         if (entity != NULL) {
 156                 position_t const *const pos = &entity->base.pos;
 157                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 158         }
 159         return new_r_Unknown(irg, mode);
 160 }
 161
 162 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 163 {
 164         position_t const *const pos = (position_t const*)dbg;
 165         if (pos) {
 166                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 167         } else {
 168                 return (src_loc_t){ NULL, 0, 0 };
 169         }
 170 }
 171
 172 static dbg_info *get_dbg_info(const position_t *pos)
 173 {
 174         return (dbg_info*) pos;
 175 }
 176
 177 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 178                                     const type_dbg_info *dbg)
 179 {
 180         assert(dbg != NULL);
 181         print_to_buffer(buffer, buffer_size);
 182         const type_t *type = (const type_t*) dbg;
 183         print_type(type);
 184         finish_print_to_buffer();
 185 }
 186
 187 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 188 {
 189         return (type_dbg_info*) type;
 190 }
 191
 192 /* is the current block a reachable one? */
 193 static bool currently_reachable(void)
 194 {
 195         ir_node *const block = get_cur_block();
 196         return block != NULL && !is_Bad(block);
 197 }
 198
 199 static void set_unreachable_now(void)
 200 {
 201         set_cur_block(NULL);
 202 }
 203
 204 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 205
 206 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
 207 static ir_node *expression_to_value(expression_t const *expr);
 208 static complex_value expression_to_complex(const expression_t *expression);
 209
 210 static unsigned decide_modulo_shift(unsigned type_size)
 211 {
 212         if (architecture_modulo_shift == 0)
 213                 return 0;
 214         if (type_size < architecture_modulo_shift)
 215                 return architecture_modulo_shift;
 216         return type_size;
 217 }
 218
 219 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 220 {
 221         unsigned flags = get_atomic_type_flags(kind);
 222         unsigned size  = get_atomic_type_size(kind);
 223         if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
 224                 switch (size) {
 225                 case 4:  return get_modeF();
 226                 case 8:  return get_modeD();
 227                 default: panic("unexpected kind");
 228                 }
 229         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 230                 char            name[64];
 231                 unsigned        bit_size     = size * 8;
 232                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 233                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 234
 235                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 236                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 237                                     modulo_shift);
 238         }
 239
 240         return NULL;
 241 }
 242
 243 /**
 244  * Initialises the atomic modes depending on the machine size.
 245  */
 246 static void init_atomic_modes(void)
 247 {
 248         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 249         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 250                 if (atomic_modes[i] != NULL)
 251                         continue;
 252                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 253         }
 254 }
 255
 256 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 257 {
 258         assert(kind <= ATOMIC_TYPE_LAST);
 259         return atomic_modes[kind];
 260 }
 261
 262 static ir_node *get_vla_size(array_type_t *const type)
 263 {
 264         ir_node *size_node = type->size_node;
 265         if (size_node == NULL) {
 266                 size_node = expression_to_value(type->size_expression);
 267                 type->size_node = size_node;
 268         }
 269         return size_node;
 270 }
 271
 272 static unsigned count_parameters(const function_type_t *function_type)
 273 {
 274         unsigned count = 0;
 275
 276         function_parameter_t *parameter = function_type->parameters;
 277         for ( ; parameter != NULL; parameter = parameter->next) {
 278                 ++count;
 279         }
 280
 281         return count;
 282 }
 283
 284 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
 285                                         type_dbg_info *dbgi)
 286 {
 287         ir_mode        *mode      = atomic_modes[akind];
 288         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 289         unsigned        alignment = get_atomic_type_alignment(akind);
 290         unsigned        size      = get_atomic_type_size(akind);
 291
 292         set_type_size_bytes(irtype, size);
 293         set_type_alignment_bytes(irtype, alignment);
 294
 295         return irtype;
 296 }
 297
 298 /**
 299  * Creates a Firm type for an atomic type
 300  */
 301 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 302 {
 303         type_dbg_info *dbgi = get_type_dbg_info_(type);
 304         return create_primitive_irtype(akind, dbgi);
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(atomic_type_kind_t akind,
 311                                     const type_t *type)
 312 {
 313         type_dbg_info *dbgi   = get_type_dbg_info_(type);
 314         ir_type       *etype  = create_primitive_irtype(akind, NULL);
 315         ir_type       *irtype = new_d_type_array(1, etype, dbgi);
 316
 317         int align = get_type_alignment_bytes(etype);
 318         set_type_alignment_bytes(irtype, align);
 319         unsigned n_elements = 2;
 320         set_array_bounds_int(irtype, 0, 0, n_elements);
 321         size_t elemsize = get_type_size_bytes(etype);
 322         if (elemsize % align > 0) {
 323                 elemsize += align - (elemsize % align);
 324         }
 325         set_type_size_bytes(irtype, n_elements * elemsize);
 326         set_type_state(irtype, layout_fixed);
 327
 328         return irtype;
 329 }
 330
 331 /**
 332  * Creates a Firm type for an imaginary type
 333  */
 334 static ir_type *create_imaginary_type(const atomic_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    = is_type_void(return_type) ? 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 (!is_type_void(return_type)) {
 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         const decl_modifiers_t modifiers = function_type->modifiers;
 421         if (modifiers & DM_CONST)
 422                 add_method_additional_properties(irtype, mtp_property_const);
 423         if (modifiers & DM_PURE)
 424                 add_method_additional_properties(irtype, mtp_property_pure);
 425         if (modifiers & DM_RETURNS_TWICE)
 426                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 427         if (modifiers & DM_NORETURN)
 428                 add_method_additional_properties(irtype, mtp_property_noreturn);
 429         if (modifiers & DM_NOTHROW)
 430                 add_method_additional_properties(irtype, mtp_property_nothrow);
 431         if (modifiers & DM_MALLOC)
 432                 add_method_additional_properties(irtype, mtp_property_malloc);
 433
 434         return irtype;
 435 }
 436
 437 static ir_type *create_pointer_type(pointer_type_t *type)
 438 {
 439         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 440         type_t        *points_to    = type->points_to;
 441         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 442         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 443
 444         return irtype;
 445 }
 446
 447 static ir_type *create_reference_type(reference_type_t *type)
 448 {
 449         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 450         type_t        *refers_to    = type->refers_to;
 451         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 452         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 453
 454         return irtype;
 455 }
 456
 457 static ir_type *create_array_type(array_type_t *type)
 458 {
 459         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 460         type_t        *element_type    = type->element_type;
 461         ir_type       *ir_element_type = get_ir_type(element_type);
 462         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 463
 464         const int align = get_type_alignment_bytes(ir_element_type);
 465         set_type_alignment_bytes(irtype, align);
 466
 467         if (type->size_constant) {
 468                 int n_elements = type->size;
 469
 470                 set_array_bounds_int(irtype, 0, 0, n_elements);
 471
 472                 size_t elemsize = get_type_size_bytes(ir_element_type);
 473                 if (elemsize % align > 0) {
 474                         elemsize += align - (elemsize % align);
 475                 }
 476                 set_type_size_bytes(irtype, n_elements * elemsize);
 477         } else {
 478                 set_array_lower_bound_int(irtype, 0, 0);
 479         }
 480         set_type_state(irtype, layout_fixed);
 481
 482         return irtype;
 483 }
 484
 485 /**
 486  * Return the signed integer type of size bits.
 487  *
 488  * @param size   the size
 489  */
 490 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 491                                                  unsigned size,
 492                                                                                                  const type_t *type)
 493 {
 494         static ir_mode *s_modes[64 + 1] = {NULL, };
 495         ir_type *res;
 496         ir_mode *mode;
 497
 498         if (size <= 0 || size > 64)
 499                 return NULL;
 500
 501         mode = s_modes[size];
 502         if (mode == NULL) {
 503                 char name[32];
 504
 505                 snprintf(name, sizeof(name), "bf_I%u", size);
 506                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 507                 s_modes[size] = mode;
 508         }
 509
 510         type_dbg_info *dbgi = get_type_dbg_info_(type);
 511         res                 = new_d_type_primitive(mode, dbgi);
 512         set_primitive_base_type(res, base_tp);
 513
 514         return res;
 515 }
 516
 517 /**
 518  * Return the unsigned integer type of size bits.
 519  *
 520  * @param size   the size
 521  */
 522 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 523                                                    unsigned size,
 524                                                                                                    const type_t *type)
 525 {
 526         static ir_mode *u_modes[64 + 1] = {NULL, };
 527         ir_type *res;
 528         ir_mode *mode;
 529
 530         if (size <= 0 || size > 64)
 531                 return NULL;
 532
 533         mode = u_modes[size];
 534         if (mode == NULL) {
 535                 char name[32];
 536
 537                 snprintf(name, sizeof(name), "bf_U%u", size);
 538                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 539                 u_modes[size] = mode;
 540         }
 541
 542         type_dbg_info *dbgi = get_type_dbg_info_(type);
 543         res = new_d_type_primitive(mode, dbgi);
 544         set_primitive_base_type(res, base_tp);
 545
 546         return res;
 547 }
 548
 549 static ir_type *create_bitfield_type(const entity_t *entity)
 550 {
 551         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 552         type_t *base = skip_typeref(entity->declaration.type);
 553         assert(is_type_integer(base));
 554         ir_type *irbase = get_ir_type(base);
 555
 556         unsigned bit_size = entity->compound_member.bit_size;
 557
 558         if (is_type_signed(base)) {
 559                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 560         } else {
 561                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 562         }
 563 }
 564
 565 /**
 566  * Construct firm type from ast struct type.
 567  */
 568 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 569 {
 570         compound_t *compound = type->compound;
 571
 572         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 573                 return compound->irtype;
 574         }
 575
 576         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 577
 578         symbol_t *type_symbol = compound->base.symbol;
 579         ident    *id;
 580         if (type_symbol != NULL) {
 581                 id = new_id_from_str(type_symbol->string);
 582         } else {
 583                 if (is_union) {
 584                         id = id_unique("__anonymous_union.%u");
 585                 } else {
 586                         id = id_unique("__anonymous_struct.%u");
 587                 }
 588         }
 589
 590         ir_type *irtype;
 591         if (is_union) {
 592                 irtype = new_type_union(id);
 593         } else {
 594                 irtype = new_type_struct(id);
 595         }
 596
 597         compound->irtype_complete = false;
 598         compound->irtype          = irtype;
 599
 600         if (incomplete)
 601                 return irtype;
 602
 603         if (is_union) {
 604                 layout_union_type(type);
 605         } else {
 606                 layout_struct_type(type);
 607         }
 608
 609         compound->irtype_complete = true;
 610
 611         entity_t *entry = compound->members.entities;
 612         for ( ; entry != NULL; entry = entry->base.next) {
 613                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 614                         continue;
 615
 616                 symbol_t *symbol     = entry->base.symbol;
 617                 type_t   *entry_type = entry->declaration.type;
 618                 ident    *ident;
 619                 if (symbol == NULL) {
 620                         /* anonymous bitfield member, skip */
 621                         if (entry->compound_member.bitfield)
 622                                 continue;
 623                         assert(is_type_compound(entry_type));
 624                         ident = id_unique("anon.%u");
 625                 } else {
 626                         ident = new_id_from_str(symbol->string);
 627                 }
 628
 629                 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
 630
 631                 ir_type *entry_irtype;
 632                 if (entry->compound_member.bitfield) {
 633                         entry_irtype = create_bitfield_type(entry);
 634                 } else {
 635                         entry_irtype = get_ir_type(entry_type);
 636                 }
 637                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 638
 639                 set_entity_offset(entity, entry->compound_member.offset);
 640                 set_entity_offset_bits_remainder(entity,
 641                                                  entry->compound_member.bit_offset);
 642
 643                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 644                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 645                 entry->compound_member.entity = entity;
 646         }
 647
 648         set_type_alignment_bytes(irtype, compound->alignment);
 649         set_type_size_bytes(irtype, compound->size);
 650         set_type_state(irtype, layout_fixed);
 651
 652         return irtype;
 653 }
 654
 655 void determine_enum_values(enum_type_t *const type)
 656 {
 657         ir_mode   *const mode    = atomic_modes[type->base.akind];
 658         ir_tarval *const one     = get_mode_one(mode);
 659         ir_tarval *      tv_next = get_mode_null(mode);
 660
 661         enum_t   *enume = type->enume;
 662         entity_t *entry = enume->base.next;
 663         for (; entry != NULL; entry = entry->base.next) {
 664                 if (entry->kind != ENTITY_ENUM_VALUE)
 665                         break;
 666
 667                 expression_t *const init = entry->enum_value.value;
 668                 if (init != NULL) {
 669                         tv_next = fold_constant_to_tarval(init);
 670                 }
 671                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 672                 entry->enum_value.tv = tv_next;
 673                 tv_next = tarval_add(tv_next, one);
 674         }
 675 }
 676
 677 static ir_type *create_enum_type(enum_type_t *const type)
 678 {
 679         return create_atomic_type(type->base.akind, (const type_t*) type);
 680 }
 681
 682 static ir_type *get_ir_type_incomplete(type_t *type)
 683 {
 684         type = skip_typeref(type);
 685
 686         if (type->base.firm_type != NULL) {
 687                 return type->base.firm_type;
 688         }
 689
 690         if (is_type_compound(type)) {
 691                 return create_compound_type(&type->compound, true);
 692         } else {
 693                 return get_ir_type(type);
 694         }
 695 }
 696
 697 ir_type *get_ir_type(type_t *type)
 698 {
 699         type = skip_typeref(type);
 700
 701         if (type->base.firm_type != NULL) {
 702                 return type->base.firm_type;
 703         }
 704
 705         ir_type *firm_type = NULL;
 706         switch (type->kind) {
 707         case TYPE_ATOMIC:
 708                 firm_type = create_atomic_type(type->atomic.akind, type);
 709                 break;
 710         case TYPE_COMPLEX:
 711                 firm_type = create_complex_type(type->atomic.akind, type);
 712                 break;
 713         case TYPE_IMAGINARY:
 714                 firm_type = create_imaginary_type(&type->atomic);
 715                 break;
 716         case TYPE_FUNCTION:
 717                 firm_type = create_method_type(&type->function, false);
 718                 break;
 719         case TYPE_POINTER:
 720                 firm_type = create_pointer_type(&type->pointer);
 721                 break;
 722         case TYPE_REFERENCE:
 723                 firm_type = create_reference_type(&type->reference);
 724                 break;
 725         case TYPE_ARRAY:
 726                 firm_type = create_array_type(&type->array);
 727                 break;
 728         case TYPE_COMPOUND_STRUCT:
 729         case TYPE_COMPOUND_UNION:
 730                 firm_type = create_compound_type(&type->compound, false);
 731                 break;
 732         case TYPE_ENUM:
 733                 firm_type = create_enum_type(&type->enumt);
 734                 break;
 735
 736         case TYPE_ERROR:
 737         case TYPE_TYPEOF:
 738         case TYPE_TYPEDEF:
 739                 break;
 740         }
 741         if (firm_type == NULL)
 742                 panic("unknown type found");
 743
 744         type->base.firm_type = firm_type;
 745         return firm_type;
 746 }
 747
 748 static ir_mode *get_ir_mode_storage(type_t *type)
 749 {
 750         type = skip_typeref(type);
 751
 752         /* Firm doesn't report a mode for arrays and structs/unions. */
 753         if (!is_type_scalar(type) || is_type_complex(type)) {
 754                 return mode_P_data;
 755         }
 756
 757         ir_type *const irtype = get_ir_type(type);
 758         ir_mode *const mode   = get_type_mode(irtype);
 759         assert(mode != NULL);
 760         return mode;
 761 }
 762
 763 static ir_mode *get_complex_mode_storage(type_t *type)
 764 {
 765         assert(is_type_complex(skip_typeref(type)));
 766         ir_type *const irtype = get_ir_type(type);
 767         ir_type *const etype  = get_array_element_type(irtype);
 768         ir_mode *const mode   = get_type_mode(etype);
 769         return mode;
 770 }
 771
 772 /*
 773  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 774  * int that it returns bigger modes for floating point on some platforms
 775  * (x87 internally does arithemtic with 80bits)
 776  */
 777 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 778 {
 779         ir_mode *mode = get_ir_mode_storage(type);
 780         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 781                 return mode_float_arithmetic;
 782         }
 783
 784         return mode;
 785 }
 786
 787 static ir_mode *get_complex_mode_arithmetic(type_t *type)
 788 {
 789         ir_mode *mode = get_complex_mode_storage(type);
 790         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 791                 return mode_float_arithmetic;
 792         }
 793
 794         return mode;
 795 }
 796
 797 /**
 798  * Return a node representing the size of a type.
 799  */
 800 static ir_node *get_type_size_node(type_t *type)
 801 {
 802         ir_mode *const mode = get_ir_mode_storage(type_size_t);
 803         type = skip_typeref(type);
 804
 805         if (is_type_array(type) && type->array.is_vla) {
 806                 ir_node *size_node = get_vla_size(&type->array);
 807                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 808                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 809                 return real_size;
 810         }
 811
 812         unsigned const size = get_type_size(type);
 813         return new_Const_long(mode, size);
 814 }
 815
 816 /** Names of the runtime functions. */
 817 static const struct {
 818         int        id;           /**< the rts id */
 819         int        n_res;        /**< number of return values */
 820         const char *name;        /**< the name of the rts function */
 821         int        n_params;     /**< number of parameters */
 822         unsigned   flags;        /**< language flags */
 823 } rts_data[] = {
 824         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 825         { rts_abort,      0, "abort",        0, _C89 },
 826         { rts_alloca,     1, "alloca",       1, _ALL },
 827         { rts_abs,        1, "abs",          1, _C89 },
 828         { rts_labs,       1, "labs",         1, _C89 },
 829         { rts_llabs,      1, "llabs",        1, _C99 },
 830         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 831
 832         { rts_fabs,       1, "fabs",         1, _C89 },
 833         { rts_sqrt,       1, "sqrt",         1, _C89 },
 834         { rts_cbrt,       1, "cbrt",         1, _C99 },
 835         { rts_exp,        1, "exp",          1, _C89 },
 836         { rts_exp2,       1, "exp2",         1, _C89 },
 837         { rts_exp10,      1, "exp10",        1, _GNUC },
 838         { rts_log,        1, "log",          1, _C89 },
 839         { rts_log2,       1, "log2",         1, _C89 },
 840         { rts_log10,      1, "log10",        1, _C89 },
 841         { rts_pow,        1, "pow",          2, _C89 },
 842         { rts_sin,        1, "sin",          1, _C89 },
 843         { rts_cos,        1, "cos",          1, _C89 },
 844         { rts_tan,        1, "tan",          1, _C89 },
 845         { rts_asin,       1, "asin",         1, _C89 },
 846         { rts_acos,       1, "acos",         1, _C89 },
 847         { rts_atan,       1, "atan",         1, _C89 },
 848         { rts_sinh,       1, "sinh",         1, _C89 },
 849         { rts_cosh,       1, "cosh",         1, _C89 },
 850         { rts_tanh,       1, "tanh",         1, _C89 },
 851
 852         { rts_fabsf,      1, "fabsf",        1, _C99 },
 853         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 854         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 855         { rts_expf,       1, "expf",         1, _C99 },
 856         { rts_exp2f,      1, "exp2f",        1, _C99 },
 857         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 858         { rts_logf,       1, "logf",         1, _C99 },
 859         { rts_log2f,      1, "log2f",        1, _C99 },
 860         { rts_log10f,     1, "log10f",       1, _C99 },
 861         { rts_powf,       1, "powf",         2, _C99 },
 862         { rts_sinf,       1, "sinf",         1, _C99 },
 863         { rts_cosf,       1, "cosf",         1, _C99 },
 864         { rts_tanf,       1, "tanf",         1, _C99 },
 865         { rts_asinf,      1, "asinf",        1, _C99 },
 866         { rts_acosf,      1, "acosf",        1, _C99 },
 867         { rts_atanf,      1, "atanf",        1, _C99 },
 868         { rts_sinhf,      1, "sinhf",        1, _C99 },
 869         { rts_coshf,      1, "coshf",        1, _C99 },
 870         { rts_tanhf,      1, "tanhf",        1, _C99 },
 871
 872         { rts_fabsl,      1, "fabsl",        1, _C99 },
 873         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 874         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 875         { rts_expl,       1, "expl",         1, _C99 },
 876         { rts_exp2l,      1, "exp2l",        1, _C99 },
 877         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 878         { rts_logl,       1, "logl",         1, _C99 },
 879         { rts_log2l,      1, "log2l",        1, _C99 },
 880         { rts_log10l,     1, "log10l",       1, _C99 },
 881         { rts_powl,       1, "powl",         2, _C99 },
 882         { rts_sinl,       1, "sinl",         1, _C99 },
 883         { rts_cosl,       1, "cosl",         1, _C99 },
 884         { rts_tanl,       1, "tanl",         1, _C99 },
 885         { rts_asinl,      1, "asinl",        1, _C99 },
 886         { rts_acosl,      1, "acosl",        1, _C99 },
 887         { rts_atanl,      1, "atanl",        1, _C99 },
 888         { rts_sinhl,      1, "sinhl",        1, _C99 },
 889         { rts_coshl,      1, "coshl",        1, _C99 },
 890         { rts_tanhl,      1, "tanhl",        1, _C99 },
 891
 892         { rts_strcmp,     1, "strcmp",       2, _C89 },
 893         { rts_strncmp,    1, "strncmp",      3, _C89 },
 894         { rts_strcpy,     1, "strcpy",       2, _C89 },
 895         { rts_strlen,     1, "strlen",       1, _C89 },
 896         { rts_memcpy,     1, "memcpy",       3, _C89 },
 897         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 898         { rts_memmove,    1, "memmove",      3, _C89 },
 899         { rts_memset,     1, "memset",       3, _C89 },
 900         { rts_memcmp,     1, "memcmp",       3, _C89 },
 901 };
 902
 903 static ident *rts_idents[lengthof(rts_data)];
 904
 905 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 906
 907 void set_create_ld_ident(ident *(*func)(entity_t*))
 908 {
 909         create_ld_ident = func;
 910 }
 911
 912 static bool declaration_is_definition(const entity_t *entity)
 913 {
 914         switch (entity->kind) {
 915         case ENTITY_VARIABLE:
 916                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 917         case ENTITY_FUNCTION:
 918                 return entity->function.body != NULL;
 919         case ENTITY_PARAMETER:
 920         case ENTITY_COMPOUND_MEMBER:
 921                 return false;
 922         case ENTITY_TYPEDEF:
 923         case ENTITY_ENUM:
 924         case ENTITY_ENUM_VALUE:
 925         case ENTITY_NAMESPACE:
 926         case ENTITY_LABEL:
 927         case ENTITY_LOCAL_LABEL:
 928                 break;
 929         }
 930         panic("entity is not a declaration");
 931 }
 932
 933 /**
 934  * Handle GNU attributes for entities
 935  *
 936  * @param ent   the entity
 937  * @param decl  the routine declaration
 938  */
 939 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 940 {
 941         assert(is_declaration(entity));
 942         decl_modifiers_t modifiers = entity->declaration.modifiers;
 943
 944         if (is_method_entity(irentity)) {
 945                 if (modifiers & DM_PURE)
 946                         add_entity_additional_properties(irentity, mtp_property_pure);
 947                 if (modifiers & DM_CONST)
 948                         add_entity_additional_properties(irentity, mtp_property_const);
 949                 if (modifiers & DM_NOINLINE)
 950                         add_entity_additional_properties(irentity, mtp_property_noinline);
 951                 if (modifiers & DM_FORCEINLINE)
 952                         add_entity_additional_properties(irentity, mtp_property_always_inline);
 953                 if (modifiers & DM_NAKED)
 954                         add_entity_additional_properties(irentity, mtp_property_naked);
 955                 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
 956                         add_entity_additional_properties(irentity,
 957                                                                                          mtp_property_inline_recommended);
 958         }
 959         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 960                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 961         }
 962         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 963             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 964                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 965         }
 966 }
 967
 968 static bool is_main(entity_t *entity)
 969 {
 970         static symbol_t *sym_main = NULL;
 971         if (sym_main == NULL) {
 972                 sym_main = symbol_table_insert("main");
 973         }
 974
 975         if (entity->base.symbol != sym_main)
 976                 return false;
 977         /* must be in outermost scope */
 978         if (entity->base.parent_scope != &current_translation_unit->scope)
 979                 return false;
 980
 981         return true;
 982 }
 983
 984 /**
 985  * Creates an entity representing a function.
 986  *
 987  * @param entity       the function declaration/definition
 988  * @param owner_type   the owner type of this function, NULL
 989  *                     for global functions
 990  */
 991 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 992 {
 993         assert(entity->kind == ENTITY_FUNCTION);
 994         if (entity->function.irentity != NULL)
 995                 return entity->function.irentity;
 996
 997         switch (entity->function.btk) {
 998         case BUILTIN_NONE:
 999         case BUILTIN_LIBC:
1000         case BUILTIN_LIBC_CHECK:
1001                 break;
1002         default:
1003                 return NULL;
1004         }
1005
1006         symbol_t *symbol = entity->base.symbol;
1007         ident    *id     = new_id_from_str(symbol->string);
1008
1009         /* already an entity defined? */
1010         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1011         bool const has_body = entity->function.body != NULL;
1012         if (irentity != NULL) {
1013                 goto entity_created;
1014         }
1015
1016         ir_type *ir_type_method;
1017         if (entity->function.need_closure)
1018                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
1019         else
1020                 ir_type_method = get_ir_type(entity->declaration.type);
1021
1022         bool nested_function = false;
1023         if (owner_type == NULL)
1024                 owner_type = get_glob_type();
1025         else
1026                 nested_function = true;
1027
1028         dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
1029         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1030
1031         ident *ld_id;
1032         if (nested_function)
1033                 ld_id = id_unique("inner.%u");
1034         else
1035                 ld_id = create_ld_ident(entity);
1036         set_entity_ld_ident(irentity, ld_id);
1037
1038         handle_decl_modifiers(irentity, entity);
1039
1040         if (! nested_function) {
1041                 storage_class_tag_t const storage_class
1042                         = (storage_class_tag_t) entity->declaration.storage_class;
1043                 if (storage_class == STORAGE_CLASS_STATIC) {
1044                     set_entity_visibility(irentity, ir_visibility_local);
1045                 } else {
1046                     set_entity_visibility(irentity, ir_visibility_external);
1047                 }
1048
1049                 bool const is_inline = entity->function.is_inline;
1050                 if (is_inline && has_body) {
1051                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1052                             || ((c_mode & _C99) == 0
1053                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1054                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1055                         }
1056                 }
1057         } else {
1058                 /* nested functions are always local */
1059                 set_entity_visibility(irentity, ir_visibility_local);
1060         }
1061
1062         /* We should check for file scope here, but as long as we compile C only
1063            this is not needed. */
1064         if (!freestanding && !has_body) {
1065                 /* check for a known runtime function */
1066                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1067                         if (id != rts_idents[i])
1068                                 continue;
1069
1070                         function_type_t *function_type
1071                                 = &entity->declaration.type->function;
1072                         /* rts_entities code can't handle a "wrong" number of parameters */
1073                         if (function_type->unspecified_parameters)
1074                                 continue;
1075
1076                         /* check number of parameters */
1077                         int n_params = count_parameters(function_type);
1078                         if (n_params != rts_data[i].n_params)
1079                                 continue;
1080
1081                         type_t *return_type = skip_typeref(function_type->return_type);
1082                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1083                         if (n_res != rts_data[i].n_res)
1084                                 continue;
1085
1086                         /* ignore those rts functions not necessary needed for current mode */
1087                         if ((c_mode & rts_data[i].flags) == 0)
1088                                 continue;
1089                         assert(rts_entities[rts_data[i].id] == NULL);
1090                         rts_entities[rts_data[i].id] = irentity;
1091                 }
1092         }
1093
1094         entitymap_insert(&entitymap, symbol, irentity);
1095
1096 entity_created:
1097         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1098         entity->function.irentity = irentity;
1099
1100         return irentity;
1101 }
1102
1103 /**
1104  * Creates a SymConst for a given entity.
1105  *
1106  * @param dbgi    debug info
1107  * @param entity  the entity
1108  */
1109 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1110 {
1111         assert(entity != NULL);
1112         union symconst_symbol sym;
1113         sym.entity_p = entity;
1114         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1115 }
1116
1117 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1118 {
1119         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1120 }
1121
1122 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1123 {
1124         ir_mode *value_mode = get_irn_mode(value);
1125
1126         if (value_mode == dest_mode)
1127                 return value;
1128
1129         return new_d_Conv(dbgi, value, dest_mode);
1130 }
1131
1132 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1133 {
1134         ir_mode *const mode = get_ir_mode_storage(type);
1135         return create_conv(dbgi, val, mode);
1136 }
1137
1138 /**
1139  * Creates a SymConst node representing a string constant.
1140  *
1141  * @param src_pos    the source position of the string constant
1142  * @param id_prefix  a prefix for the name of the generated string constant
1143  * @param value      the value of the string constant
1144  */
1145 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1146 {
1147         size_t            const slen        = get_string_len(value) + 1;
1148         ir_initializer_t *const initializer = create_initializer_compound(slen);
1149         ir_type          *      elem_type;
1150         switch (value->encoding) {
1151         case STRING_ENCODING_CHAR:
1152         case STRING_ENCODING_UTF8: {
1153                 elem_type = ir_type_char;
1154
1155                 ir_mode *const mode = get_type_mode(elem_type);
1156                 char const    *p    = value->begin;
1157                 for (size_t i = 0; i < slen; ++i) {
1158                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1159                         ir_initializer_t *val = create_initializer_tarval(tv);
1160                         set_initializer_compound_value(initializer, i, val);
1161                 }
1162                 goto finish;
1163         }
1164
1165         {
1166                 type_t *type;
1167         case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1168         case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1169         case STRING_ENCODING_WIDE:   type = type_wchar_t;  goto init_wide;
1170 init_wide:;
1171                 elem_type = get_ir_type(type);
1172
1173                 ir_mode *const mode = get_type_mode(elem_type);
1174                 char const    *p    = value->begin;
1175                 for (size_t i = 0; i < slen; ++i) {
1176                         assert(p <= value->begin + value->size);
1177                         utf32             v   = read_utf8_char(&p);
1178                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1179                         ir_initializer_t *val = create_initializer_tarval(tv);
1180                         set_initializer_compound_value(initializer, i, val);
1181                 }
1182                 goto finish;
1183         }
1184         }
1185         panic("invalid string encoding");
1186
1187 finish:;
1188         ir_type *const type = new_type_array(1, elem_type);
1189         set_array_bounds_int(type, 0, 0, slen);
1190         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1191         set_type_state(      type, layout_fixed);
1192
1193         ir_type   *const global_type = get_glob_type();
1194         ident     *const id          = id_unique(id_prefix);
1195         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1196         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1197         set_entity_ld_ident(   entity, id);
1198         set_entity_visibility( entity, ir_visibility_private);
1199         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1200         set_entity_initializer(entity, initializer);
1201
1202         return create_symconst(dbgi, entity);
1203 }
1204
1205 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1206 {
1207         assert(type->kind == TYPE_ATOMIC || type->kind == TYPE_COMPLEX);
1208         atomic_type_kind_t akind = type->atomic.akind;
1209
1210         ir_mode    *const mode = atomic_modes[akind];
1211         char const *const str  = literal->value.begin;
1212         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1213         if (tv == tarval_bad)
1214                 return false;
1215
1216         literal->base.type    = type;
1217         literal->target_value = tv;
1218         return true;
1219 }
1220
1221 void determine_literal_type(literal_expression_t *const literal)
1222 {
1223         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1224
1225         /* -1: signed only, 0: any, 1: unsigned only */
1226         int const sign =
1227                 !is_type_signed(literal->base.type) ? 1 :
1228                 literal->value.begin[0] == '0'      ? 0 :
1229                 -1; /* Decimal literals only try signed types. */
1230
1231         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1232         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1233
1234         if (try_create_integer(literal, literal->base.type))
1235                 goto finished;
1236
1237         /* now try if the constant is small enough for some types */
1238         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1239                 goto finished;
1240         if (sign <= 0 && try_create_integer(literal, type_long))
1241                 goto finished;
1242         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1243                 goto finished;
1244         /* last try? then we should not report tarval_bad */
1245         if (sign < 0)
1246                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1247         if (sign <= 0 && try_create_integer(literal, type_long_long))
1248                 goto finished;
1249
1250         /* last try */
1251         assert(sign >= 0);
1252         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1253         bool res = try_create_integer(literal, type_unsigned_long_long);
1254         if (!res)
1255                 panic("internal error when parsing number literal");
1256
1257 finished:
1258         tarval_set_integer_overflow_mode(old_mode);
1259 }
1260
1261 /**
1262  * Creates a Const node representing a constant.
1263  */
1264 static ir_node *literal_to_firm_(const literal_expression_t *literal,
1265                                  ir_mode *mode)
1266 {
1267         const char *string = literal->value.begin;
1268         size_t      size   = literal->value.size;
1269         ir_tarval  *tv;
1270
1271         switch (literal->base.kind) {
1272         case EXPR_LITERAL_INTEGER:
1273                 assert(literal->target_value != NULL);
1274                 tv = literal->target_value;
1275                 break;
1276
1277         case EXPR_LITERAL_FLOATINGPOINT:
1278                 tv = new_tarval_from_str(string, size, mode);
1279                 break;
1280
1281         case EXPR_LITERAL_BOOLEAN:
1282                 if (string[0] == 't') {
1283                         tv = get_mode_one(mode);
1284                 } else {
1285                         assert(string[0] == 'f');
1286         case EXPR_LITERAL_MS_NOOP:
1287                         tv = get_mode_null(mode);
1288                 }
1289                 break;
1290
1291         default:
1292                 panic("invalid literal kind");
1293         }
1294
1295         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1296         return new_d_Const(dbgi, tv);
1297 }
1298
1299 static ir_node *literal_to_firm(const literal_expression_t *literal)
1300 {
1301         type_t  *type         = skip_typeref(literal->base.type);
1302         ir_mode *mode_storage = get_ir_mode_storage(type);
1303         return literal_to_firm_(literal, mode_storage);
1304 }
1305
1306 /**
1307  * Creates a Const node representing a character constant.
1308  */
1309 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1310 {
1311         type_t     *type   = skip_typeref(literal->base.type);
1312         ir_mode    *mode   = get_ir_mode_storage(type);
1313         const char *string = literal->value.begin;
1314         size_t      size   = literal->value.size;
1315         ir_tarval  *tv;
1316
1317         switch (literal->value.encoding) {
1318         case STRING_ENCODING_WIDE: {
1319                 utf32  v = read_utf8_char(&string);
1320                 char   buf[128];
1321                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1322
1323                 tv = new_tarval_from_str(buf, len, mode);
1324                 break;
1325         }
1326
1327         case STRING_ENCODING_CHAR: {
1328                 long long int v;
1329                 bool char_is_signed
1330                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1331                 if (size == 1 && char_is_signed) {
1332                         v = (signed char)string[0];
1333                 } else {
1334                         v = 0;
1335                         for (size_t i = 0; i < size; ++i) {
1336                                 v = (v << 8) | ((unsigned char)string[i]);
1337                         }
1338                 }
1339                 char   buf[128];
1340                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1341
1342                 tv = new_tarval_from_str(buf, len, mode);
1343                 break;
1344         }
1345
1346         default:
1347                 panic("invalid literal kind");
1348         }
1349
1350         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1351         return new_d_Const(dbgi, tv);
1352 }
1353
1354 /*
1355  * Allocate an area of size bytes aligned at alignment
1356  * at a frame type.
1357  */
1358 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1359 {
1360         static unsigned area_cnt = 0;
1361         char buf[32];
1362
1363         ir_type *tp = new_type_array(1, ir_type_char);
1364         set_array_bounds_int(tp, 0, 0, size);
1365         set_type_alignment_bytes(tp, alignment);
1366
1367         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1368         ident *name = new_id_from_str(buf);
1369         ir_entity *area = new_entity(frame_type, name, tp);
1370
1371         /* mark this entity as compiler generated */
1372         set_entity_compiler_generated(area, 1);
1373         return area;
1374 }
1375
1376 /**
1377  * Return a node representing a trampoline region
1378  * for a given function entity.
1379  *
1380  * @param dbgi    debug info
1381  * @param entity  the function entity
1382  */
1383 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1384 {
1385         ir_entity *region = NULL;
1386         int        i;
1387
1388         if (current_trampolines != NULL) {
1389                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1390                         if (current_trampolines[i].function == entity) {
1391                                 region = current_trampolines[i].region;
1392                                 break;
1393                         }
1394                 }
1395         } else {
1396                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1397         }
1398         ir_graph *irg = current_ir_graph;
1399         if (region == NULL) {
1400                 /* create a new region */
1401                 ir_type           *frame_tp = get_irg_frame_type(irg);
1402                 trampoline_region  reg;
1403                 reg.function = entity;
1404
1405                 reg.region   = alloc_trampoline(frame_tp,
1406                                                 be_params->trampoline_size,
1407                                                 be_params->trampoline_align);
1408                 ARR_APP1(trampoline_region, current_trampolines, reg);
1409                 region = reg.region;
1410         }
1411         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1412                                region);
1413 }
1414
1415 /**
1416  * Creates a trampoline for a function represented by an entity.
1417  *
1418  * @param dbgi    debug info
1419  * @param mode    the (reference) mode for the function address
1420  * @param entity  the function entity
1421  */
1422 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1423                                   ir_entity *entity)
1424 {
1425         assert(entity != NULL);
1426         ir_node *in[3];
1427         in[0] = get_trampoline_region(dbgi, entity);
1428         in[1] = create_symconst(dbgi, entity);
1429         in[2] = get_irg_frame(current_ir_graph);
1430
1431         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1432         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1433         return new_Proj(irn, mode, pn_Builtin_max+1);
1434 }
1435
1436 /**
1437  * Dereference an address.
1438  *
1439  * @param dbgi  debug info
1440  * @param type  the type of the dereferenced result (the points_to type)
1441  * @param addr  the address to dereference
1442  */
1443 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1444                                       ir_node *const addr)
1445 {
1446         type_t *skipped = skip_typeref(type);
1447         if (is_type_incomplete(skipped))
1448                 return addr;
1449
1450         ir_type *irtype = get_ir_type(skipped);
1451         if (is_compound_type(irtype)
1452             || is_Method_type(irtype)
1453             || is_Array_type(irtype)) {
1454                 return addr;
1455         }
1456
1457         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1458                                   ? cons_volatile : cons_none;
1459         ir_mode *const mode     = get_type_mode(irtype);
1460         ir_node *const memory   = get_store();
1461         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1462         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1463         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1464
1465         set_store(load_mem);
1466         return load_res;
1467 }
1468
1469 /**
1470  * Returns the correct base address depending on whether it is a parameter or a
1471  * normal local variable.
1472  */
1473 static ir_node *get_local_frame(ir_entity *const ent)
1474 {
1475         ir_graph      *const irg   = current_ir_graph;
1476         const ir_type *const owner = get_entity_owner(ent);
1477         if (owner == current_outer_frame) {
1478                 assert(current_static_link != NULL);
1479                 return current_static_link;
1480         } else {
1481                 return get_irg_frame(irg);
1482         }
1483 }
1484
1485 /**
1486  * Keep the current block and memory.
1487  * This is necessary for all loops, because they could become infinite.
1488  */
1489 static void keep_loop(void)
1490 {
1491         keep_alive(get_cur_block());
1492         keep_alive(get_store());
1493 }
1494
1495 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1496 {
1497         entity_t *entity = ref->entity;
1498         if (entity->enum_value.tv == NULL) {
1499                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1500                 assert(type->kind == TYPE_ENUM);
1501                 determine_enum_values(&type->enumt);
1502         }
1503
1504         return new_Const(entity->enum_value.tv);
1505 }
1506
1507 static ir_node *reference_addr(const reference_expression_t *ref)
1508 {
1509         dbg_info *dbgi   = get_dbg_info(&ref->base.pos);
1510         entity_t *entity = ref->entity;
1511         assert(is_declaration(entity));
1512
1513         if (entity->kind == ENTITY_FUNCTION
1514             && entity->function.btk != BUILTIN_NONE) {
1515                 ir_entity *irentity = get_function_entity(entity, NULL);
1516                 /* for gcc compatibility we have to produce (dummy) addresses for some
1517                  * builtins which don't have entities */
1518                 if (irentity == NULL) {
1519                         position_t const *const pos = &ref->base.pos;
1520                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1521
1522                         /* simply create a NULL pointer */
1523                         ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1524                         return new_Const(get_mode_null(mode));
1525                 }
1526         }
1527
1528         switch ((declaration_kind_t) entity->declaration.kind) {
1529         case DECLARATION_KIND_UNKNOWN:
1530                 break;
1531         case DECLARATION_KIND_PARAMETER:
1532         case DECLARATION_KIND_LOCAL_VARIABLE:
1533                 /* you can store to a local variable (so we don't panic but return NULL
1534                  * as an indicator for no real address) */
1535                 return NULL;
1536         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1537                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1538                 return addr;
1539         }
1540
1541         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1542         case DECLARATION_KIND_PARAMETER_ENTITY: {
1543                 ir_entity *irentity = entity->variable.v.entity;
1544                 ir_node   *frame    = get_local_frame(irentity);
1545                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1546                 return sel;
1547         }
1548
1549         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1550                 return entity->variable.v.vla_base;
1551
1552         case DECLARATION_KIND_FUNCTION: {
1553                 return create_symconst(dbgi, entity->function.irentity);
1554         }
1555
1556         case DECLARATION_KIND_INNER_FUNCTION: {
1557                 type_t  *const type = skip_typeref(entity->declaration.type);
1558                 ir_mode *const mode = get_ir_mode_storage(type);
1559                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1560                         /* inner function not using the closure */
1561                         return create_symconst(dbgi, entity->function.irentity);
1562                 } else {
1563                         /* need trampoline here */
1564                         return create_trampoline(dbgi, mode, entity->function.irentity);
1565                 }
1566         }
1567
1568         case DECLARATION_KIND_COMPOUND_MEMBER:
1569                 panic("not implemented reference type");
1570         }
1571
1572         panic("reference to declaration with unknown type");
1573 }
1574
1575 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1576 {
1577         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
1578         entity_t *const entity = ref->entity;
1579         assert(is_declaration(entity));
1580
1581         switch ((declaration_kind_t)entity->declaration.kind) {
1582         case DECLARATION_KIND_LOCAL_VARIABLE:
1583         case DECLARATION_KIND_PARAMETER: {
1584                 type_t  *const type  = skip_typeref(entity->declaration.type);
1585                 ir_mode *const mode  = get_ir_mode_storage(type);
1586                 return get_value(entity->variable.v.value_number, mode);
1587         }
1588
1589         default: {
1590                 ir_node *const addr = reference_addr(ref);
1591                 return deref_address(dbgi, entity->declaration.type, addr);
1592         }
1593         }
1594 }
1595
1596 /**
1597  * Transform calls to builtin functions.
1598  */
1599 static ir_node *process_builtin_call(const call_expression_t *call)
1600 {
1601         dbg_info *dbgi = get_dbg_info(&call->base.pos);
1602
1603         assert(call->function->kind == EXPR_REFERENCE);
1604         reference_expression_t *builtin = &call->function->reference;
1605
1606         type_t *expr_type = skip_typeref(builtin->base.type);
1607         assert(is_type_pointer(expr_type));
1608
1609         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1610
1611         switch (builtin->entity->function.btk) {
1612         case BUILTIN_NONE:
1613                 break;
1614         case BUILTIN_ALLOCA: {
1615                 expression_t *argument = call->arguments->expression;
1616                 ir_node      *size     = expression_to_value(argument);
1617
1618                 ir_node *store  = get_store();
1619                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1620                                               stack_alloc);
1621                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1622                 set_store(proj_m);
1623                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1624
1625                 return res;
1626         }
1627         case BUILTIN_INF: {
1628                 type_t    *type = function_type->function.return_type;
1629                 ir_mode   *mode = get_ir_mode_storage(type);
1630                 ir_tarval *tv   = get_mode_infinite(mode);
1631                 ir_node   *res  = new_d_Const(dbgi, tv);
1632                 return res;
1633         }
1634         case BUILTIN_NAN: {
1635                 /* Ignore string for now... */
1636                 assert(is_type_function(function_type));
1637                 type_t    *type = function_type->function.return_type;
1638                 ir_mode   *mode = get_ir_mode_storage(type);
1639                 ir_tarval *tv   = get_mode_NAN(mode);
1640                 ir_node   *res  = new_d_Const(dbgi, tv);
1641                 return res;
1642         }
1643         case BUILTIN_EXPECT: {
1644                 expression_t *argument = call->arguments->expression;
1645                 return expression_to_value(argument);
1646         }
1647         case BUILTIN_VA_END:
1648                 /* evaluate the argument of va_end for its side effects */
1649                 expression_to_value(call->arguments->expression);
1650                 return NULL;
1651         case BUILTIN_OBJECT_SIZE: {
1652                 /* determine value of "type" */
1653                 expression_t *type_expression = call->arguments->next->expression;
1654                 long          type_val        = fold_constant_to_int(type_expression);
1655                 type_t       *type            = function_type->function.return_type;
1656                 ir_mode      *mode            = get_ir_mode_storage(type);
1657                 /* just produce a "I don't know" result */
1658                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1659                                                 get_mode_minus_one(mode);
1660
1661                 return new_d_Const(dbgi, result);
1662         }
1663         case BUILTIN_ROTL: {
1664                 ir_node *val  = expression_to_value(call->arguments->expression);
1665                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1666                 ir_mode *mode = get_irn_mode(val);
1667                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1668                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1669         }
1670         case BUILTIN_ROTR: {
1671                 ir_node *val  = expression_to_value(call->arguments->expression);
1672                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1673                 ir_mode *mode = get_irn_mode(val);
1674                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1675                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1676                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1677                 return new_d_Rotl(dbgi, val, sub, mode);
1678         }
1679         case BUILTIN_FIRM:
1680                 break;
1681         case BUILTIN_LIBC:
1682         case BUILTIN_LIBC_CHECK:
1683                 panic("builtin did not produce an entity");
1684         }
1685         panic("invalid builtin");
1686 }
1687
1688 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
1689                                   complex_value value);
1690
1691 /**
1692  * Transform a call expression.
1693  * Handles some special cases, like alloca() calls, which must be resolved
1694  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1695  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1696  * handled right...
1697  */
1698 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1699 {
1700         dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1701         assert(currently_reachable());
1702
1703         expression_t   *function = call->function;
1704         ir_node        *callee   = NULL;
1705         bool            firm_builtin = false;
1706         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1707         if (function->kind == EXPR_REFERENCE) {
1708                 const reference_expression_t *ref    = &function->reference;
1709                 entity_t                     *entity = ref->entity;
1710
1711                 if (entity->kind == ENTITY_FUNCTION) {
1712                         builtin_kind_t builtin = entity->function.btk;
1713                         if (builtin == BUILTIN_FIRM) {
1714                                 firm_builtin = true;
1715                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1716                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1717                                    && builtin != BUILTIN_LIBC_CHECK) {
1718                                 return process_builtin_call(call);
1719                         }
1720                 }
1721         }
1722         if (!firm_builtin)
1723                 callee = expression_to_value(function);
1724
1725         type_t *type = skip_typeref(function->base.type);
1726         assert(is_type_pointer(type));
1727         pointer_type_t *pointer_type = &type->pointer;
1728         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1729         assert(is_type_function(points_to));
1730         function_type_t *function_type = &points_to->function;
1731
1732         int      n_parameters    = 0;
1733         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1734         ir_type *new_method_type = NULL;
1735         if (function_type->variadic || function_type->unspecified_parameters) {
1736                 const call_argument_t *argument = call->arguments;
1737                 for ( ; argument != NULL; argument = argument->next) {
1738                         ++n_parameters;
1739                 }
1740
1741                 /* we need to construct a new method type matching the call
1742                  * arguments... */
1743                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1744                 int n_res       = get_method_n_ress(ir_method_type);
1745                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1746                 set_method_calling_convention(new_method_type,
1747                                get_method_calling_convention(ir_method_type));
1748                 set_method_additional_properties(new_method_type,
1749                                get_method_additional_properties(ir_method_type));
1750                 set_method_variadicity(new_method_type,
1751                                        get_method_variadicity(ir_method_type));
1752
1753                 for (int i = 0; i < n_res; ++i) {
1754                         set_method_res_type(new_method_type, i,
1755                                             get_method_res_type(ir_method_type, i));
1756                 }
1757                 argument = call->arguments;
1758                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1759                         expression_t *expression = argument->expression;
1760                         ir_type      *irtype     = get_ir_type(expression->base.type);
1761                         set_method_param_type(new_method_type, i, irtype);
1762                 }
1763                 ir_method_type = new_method_type;
1764         } else {
1765                 n_parameters = get_method_n_params(ir_method_type);
1766         }
1767
1768         ir_node *in[n_parameters];
1769
1770         const call_argument_t *argument = call->arguments;
1771         for (int n = 0; n < n_parameters; ++n) {
1772                 expression_t *expression = argument->expression;
1773                 type_t       *arg_type   = skip_typeref(expression->base.type);
1774                 ir_node      *arg_node;
1775                 if (is_type_complex(arg_type)) {
1776                         complex_value value = expression_to_complex(expression);
1777                         arg_node = complex_to_memory(dbgi, arg_type, value);
1778                 } else {
1779                         arg_node = expression_to_value(expression);
1780                         if (!is_type_compound(arg_type)) {
1781                                 ir_mode *const mode = get_ir_mode_storage(arg_type);
1782                                 arg_node = create_conv(dbgi, arg_node, mode);
1783                         }
1784                 }
1785
1786                 in[n] = arg_node;
1787
1788                 argument = argument->next;
1789         }
1790
1791         ir_node *store;
1792         if (function_type->modifiers & DM_CONST) {
1793                 store = get_irg_no_mem(current_ir_graph);
1794         } else {
1795                 store = get_store();
1796         }
1797
1798         ir_node *node;
1799         type_t  *return_type = skip_typeref(function_type->return_type);
1800         ir_node *result      = NULL;
1801         if (firm_builtin) {
1802                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1803                                      ir_method_type);
1804                 if (! (function_type->modifiers & DM_CONST)) {
1805                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1806                         set_store(mem);
1807                 }
1808
1809                 if (!is_type_void(return_type)) {
1810                         assert(is_type_scalar(return_type));
1811                         ir_mode *mode = get_ir_mode_storage(return_type);
1812                         result = new_Proj(node, mode, pn_Builtin_max+1);
1813                 }
1814         } else {
1815                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1816                 if (! (function_type->modifiers & DM_CONST)) {
1817                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1818                         set_store(mem);
1819                 }
1820
1821                 if (!is_type_void(return_type)) {
1822                         ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1823                         ir_mode *const mode    = get_ir_mode_storage(return_type);
1824                         result                 = new_Proj(resproj, mode, 0);
1825                 }
1826         }
1827
1828         if (function_type->modifiers & DM_NORETURN) {
1829                 /* A dead end:  Keep the Call and the Block.  Also place all further
1830                  * nodes into a new and unreachable block. */
1831                 keep_alive(node);
1832                 keep_alive(get_cur_block());
1833                 ir_node *block = new_Block(0, NULL);
1834                 set_cur_block(block);
1835         }
1836
1837         return result;
1838 }
1839
1840 static ir_node *statement_to_firm(statement_t *statement);
1841 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1842 static ir_node *expression_to_addr(const expression_t *expression);
1843
1844 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1845                          ir_node *value)
1846 {
1847         value = conv_to_storage_type(dbgi, value, type);
1848
1849         ir_node *memory = get_store();
1850
1851         if (is_type_scalar(type) && !is_type_complex(type)) {
1852                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1853                                       ? cons_volatile : cons_none;
1854                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1855                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1856                 set_store(store_mem);
1857         } else {
1858                 ir_type *irtype    = get_ir_type(type);
1859                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1860                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1861                 set_store(copyb_mem);
1862         }
1863 }
1864
1865 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1866 {
1867         ir_tarval *all_one   = get_mode_all_one(mode);
1868         int        mode_size = get_mode_size_bits(mode);
1869         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1870
1871         assert(offset >= 0);
1872         assert(size   >= 0);
1873         assert(offset + size <= mode_size);
1874         if (size == mode_size) {
1875                 return all_one;
1876         }
1877
1878         long       shiftr    = get_mode_size_bits(mode) - size;
1879         long       shiftl    = offset;
1880         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1881         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1882         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1883         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1884
1885         return mask1;
1886 }
1887
1888 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1889                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1890                 bool need_return)
1891 {
1892         ir_type *entity_type = get_entity_type(entity);
1893         ir_type *base_type   = get_primitive_base_type(entity_type);
1894         ir_mode *mode        = get_type_mode(base_type);
1895         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1896
1897         value = create_conv(dbgi, value, mode);
1898
1899         /* kill upper bits of value and shift to right position */
1900         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1901         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1902         unsigned  base_bits  = get_mode_size_bits(mode);
1903         unsigned  shiftwidth = base_bits - bitsize;
1904
1905         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1906         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1907
1908         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1909         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1910         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1911
1912         /* load current value */
1913         ir_node   *mem             = get_store();
1914         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1915                                           set_volatile ? cons_volatile : cons_none);
1916         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1917         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1918         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1919         ir_tarval *inv_mask        = tarval_not(shift_mask);
1920         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1921         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1922
1923         /* construct new value and store */
1924         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1925         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1926                                          set_volatile ? cons_volatile : cons_none);
1927         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1928         set_store(store_mem);
1929
1930         if (!need_return)
1931                 return NULL;
1932
1933         ir_node *res_shr;
1934         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1935         if (mode_is_signed(mode)) {
1936                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1937         } else {
1938                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1939         }
1940         return res_shr;
1941 }
1942
1943 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1944                                          ir_node *addr)
1945 {
1946         dbg_info *dbgi      = get_dbg_info(&expression->base.pos);
1947         entity_t *entity    = expression->compound_entry;
1948         type_t   *base_type = entity->declaration.type;
1949         ir_mode  *mode      = get_ir_mode_storage(base_type);
1950         ir_node  *mem       = get_store();
1951         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1952         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1953         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1954         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1955
1956         ir_mode  *amode     = mode;
1957         /* optimisation, since shifting in modes < machine_size is usually
1958          * less efficient */
1959         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1960                 amode = mode_uint;
1961         }
1962         unsigned amode_size = get_mode_size_bits(amode);
1963         load_res = create_conv(dbgi, load_res, amode);
1964
1965         set_store(load_mem);
1966
1967         /* kill upper bits */
1968         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1969         unsigned   bitoffset   = entity->compound_member.bit_offset;
1970         unsigned   bitsize     = entity->compound_member.bit_size;
1971         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1972         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1973         ir_node   *countl      = new_d_Const(dbgi, tvl);
1974         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1975
1976         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1977         assert(shift_bitsr <= amode_size);
1978         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1979         ir_node   *countr      = new_d_Const(dbgi, tvr);
1980         ir_node   *shiftr;
1981         if (mode_is_signed(mode)) {
1982                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1983         } else {
1984                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1985         }
1986
1987         return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1988 }
1989
1990 /* make sure the selected compound type is constructed */
1991 static void construct_select_compound(const select_expression_t *expression)
1992 {
1993         type_t *type = skip_typeref(expression->compound->base.type);
1994         if (is_type_pointer(type)) {
1995                 type = type->pointer.points_to;
1996         }
1997         (void) get_ir_type(type);
1998 }
1999
2000 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2001                                               ir_node *value, ir_node *addr)
2002 {
2003         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2004         type_t   *type = skip_typeref(expression->base.type);
2005         value = conv_to_storage_type(dbgi, value, type);
2006
2007         if (expression->kind == EXPR_REFERENCE) {
2008                 const reference_expression_t *ref = &expression->reference;
2009
2010                 entity_t *entity = ref->entity;
2011                 assert(is_declaration(entity));
2012                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2013                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2014                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2015                         set_value(entity->variable.v.value_number, value);
2016                         return value;
2017                 }
2018         }
2019
2020         if (addr == NULL)
2021                 addr = expression_to_addr(expression);
2022         assert(addr != NULL);
2023
2024         if (expression->kind == EXPR_SELECT) {
2025                 const select_expression_t *select = &expression->select;
2026
2027                 construct_select_compound(select);
2028
2029                 entity_t *entity = select->compound_entry;
2030                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2031                 if (entity->compound_member.bitfield) {
2032                         ir_entity *irentity = entity->compound_member.entity;
2033                         bool       set_volatile
2034                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2035                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2036                                                        set_volatile, true);
2037                         return value;
2038                 }
2039         }
2040
2041         assign_value(dbgi, addr, type, value);
2042         return value;
2043 }
2044
2045 static ir_node *get_value_from_lvalue(const expression_t *expression,
2046                                       ir_node *addr)
2047 {
2048         if (expression->kind == EXPR_REFERENCE) {
2049                 const reference_expression_t *ref = &expression->reference;
2050
2051                 entity_t *entity = ref->entity;
2052                 assert(entity->kind == ENTITY_VARIABLE
2053                                 || entity->kind == ENTITY_PARAMETER);
2054                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2055                 int value_number;
2056                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2057                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2058                         value_number = entity->variable.v.value_number;
2059                         assert(addr == NULL);
2060                         type_t  *type = skip_typeref(expression->base.type);
2061                         ir_mode *mode = get_ir_mode_storage(type);
2062                         return get_value(value_number, mode);
2063                 }
2064         }
2065
2066         assert(addr != NULL);
2067         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2068
2069         ir_node *value;
2070         if (expression->kind == EXPR_SELECT &&
2071             expression->select.compound_entry->compound_member.bitfield) {
2072             construct_select_compound(&expression->select);
2073                 value = bitfield_extract_to_firm(&expression->select, addr);
2074         } else {
2075                 value = deref_address(dbgi, expression->base.type, addr);
2076         }
2077
2078         return value;
2079 }
2080
2081 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2082 {
2083         type_t  *const type = skip_typeref(expr->base.type);
2084         ir_mode *const mode = get_ir_mode_arithmetic(type);
2085
2086         ir_node *offset;
2087         if (is_type_pointer(type)) {
2088                 offset = get_type_size_node(type->pointer.points_to);
2089         } else {
2090                 assert(is_type_arithmetic(type));
2091                 offset = new_Const(get_mode_one(mode));
2092         }
2093
2094         dbg_info           *const dbgi        = get_dbg_info(&expr->base.pos);
2095         expression_t const *const value_expr  = expr->value;
2096         ir_node            *const addr        = expression_to_addr(value_expr);
2097         ir_node            *const value       = get_value_from_lvalue(value_expr, addr);
2098         ir_node            *const value_arith = create_conv(dbgi, value, mode);
2099         ir_node            *const new_value   = inc
2100                 ? new_d_Add(dbgi, value_arith, offset, mode)
2101                 : new_d_Sub(dbgi, value_arith, offset, mode);
2102
2103         ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2104         return pre ? store_value : value;
2105 }
2106
2107 static bool is_local_variable(expression_t *expression)
2108 {
2109         if (expression->kind != EXPR_REFERENCE)
2110                 return false;
2111         reference_expression_t *ref_expr = &expression->reference;
2112         entity_t               *entity   = ref_expr->entity;
2113         if (entity->kind != ENTITY_VARIABLE)
2114                 return false;
2115         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2116         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2117 }
2118
2119 static ir_relation get_relation(const expression_kind_t kind)
2120 {
2121         switch (kind) {
2122         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2123         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2124         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2125         case EXPR_BINARY_ISLESS:
2126         case EXPR_BINARY_LESS:          return ir_relation_less;
2127         case EXPR_BINARY_ISLESSEQUAL:
2128         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2129         case EXPR_BINARY_ISGREATER:
2130         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2131         case EXPR_BINARY_ISGREATEREQUAL:
2132         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2133         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2134
2135         default:
2136                 break;
2137         }
2138         panic("trying to get ir_relation from non-comparison binexpr type");
2139 }
2140
2141 /**
2142  * Handle the assume optimizer hint: check if a Confirm
2143  * node can be created.
2144  *
2145  * @param dbi    debug info
2146  * @param expr   the IL assume expression
2147  *
2148  * we support here only some simple cases:
2149  *  - var rel const
2150  *  - const rel val
2151  *  - var rel var
2152  */
2153 static ir_node *handle_assume_compare(dbg_info *dbi,
2154                                       const binary_expression_t *expression)
2155 {
2156         expression_t *op1 = expression->left;
2157         expression_t *op2 = expression->right;
2158         entity_t     *var2, *var = NULL;
2159         ir_node      *res      = NULL;
2160         ir_relation   relation = get_relation(expression->base.kind);
2161
2162         if (is_local_variable(op1) && is_local_variable(op2)) {
2163                 var  = op1->reference.entity;
2164             var2 = op2->reference.entity;
2165
2166                 type_t  *const type = skip_typeref(var->declaration.type);
2167                 ir_mode *const mode = get_ir_mode_storage(type);
2168
2169                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2170                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2171
2172                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2173                 set_value(var2->variable.v.value_number, res);
2174
2175                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2176                 set_value(var->variable.v.value_number, res);
2177
2178                 return res;
2179         }
2180
2181         expression_t *con = NULL;
2182         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2183                 var = op1->reference.entity;
2184                 con = op2;
2185         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2186                 relation = get_inversed_relation(relation);
2187                 var = op2->reference.entity;
2188                 con = op1;
2189         }
2190
2191         if (var != NULL) {
2192                 type_t  *const type = skip_typeref(var->declaration.type);
2193                 ir_mode *const mode = get_ir_mode_storage(type);
2194
2195                 res = get_value(var->variable.v.value_number, mode);
2196                 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2197                 set_value(var->variable.v.value_number, res);
2198         }
2199         return res;
2200 }
2201
2202 /**
2203  * Handle the assume optimizer hint.
2204  *
2205  * @param dbi    debug info
2206  * @param expr   the IL assume expression
2207  */
2208 static ir_node *handle_assume(expression_t const *const expr)
2209 {
2210         switch (expr->kind) {
2211         case EXPR_BINARY_EQUAL:
2212         case EXPR_BINARY_NOTEQUAL:
2213         case EXPR_BINARY_LESS:
2214         case EXPR_BINARY_LESSEQUAL:
2215         case EXPR_BINARY_GREATER:
2216         case EXPR_BINARY_GREATEREQUAL: {
2217                 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2218                 return handle_assume_compare(dbgi, &expr->binary);
2219         }
2220
2221         default:
2222                 return NULL;
2223         }
2224 }
2225
2226 static ir_node *create_cast(unary_expression_t const *const expr)
2227 {
2228         type_t *const type = skip_typeref(expr->base.type);
2229         if (is_type_void(type))
2230                 return NULL;
2231
2232         ir_node        *value     = expression_to_value(expr->value);
2233         dbg_info *const dbgi      = get_dbg_info(&expr->base.pos);
2234         type_t   *const from_type = skip_typeref(expr->value->base.type);
2235         ir_mode  *const mode      = get_ir_mode_storage(type);
2236         /* check for conversion from / to __based types */
2237         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2238                 const variable_t *from_var = from_type->pointer.base_variable;
2239                 const variable_t *to_var   = type->pointer.base_variable;
2240                 if (from_var != to_var) {
2241                         if (from_var != NULL) {
2242                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2243                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2244                                 value = new_d_Add(dbgi, value, base, mode);
2245                         }
2246                         if (to_var != NULL) {
2247                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2248                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2249                                 value = new_d_Sub(dbgi, value, base, mode);
2250                         }
2251                 }
2252         }
2253
2254         return create_conv(dbgi, value, mode);
2255 }
2256
2257 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2258 {
2259         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2260         type_t   *const type  = skip_typeref(expr->base.type);
2261         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2262         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2263         return new_d_Not(dbgi, value, mode);
2264 }
2265
2266 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2267 {
2268         dbg_info *const dbgi       = get_dbg_info(&expr->base.pos);
2269         ir_node        *value      = expression_to_value(expr->value);
2270         type_t   *const value_type = skip_typeref(expr->value->base.type);
2271         assert(is_type_pointer(value_type));
2272
2273         /* check for __based */
2274         variable_t const *const base_var = value_type->pointer.base_variable;
2275         if (base_var) {
2276                 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2277                 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2278                 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2279         }
2280         type_t *const points_to = value_type->pointer.points_to;
2281         return deref_address(dbgi, points_to, value);
2282 }
2283
2284 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2285 {
2286         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2287         type_t   *const type  = skip_typeref(expr->base.type);
2288         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2289         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2290         return new_d_Minus(dbgi, value, mode);
2291 }
2292
2293 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2294                 ir_node *value, type_t *type)
2295 {
2296         ir_mode        *const mode         = get_ir_mode_storage(type_ptrdiff_t);
2297         assert(is_type_pointer(type));
2298         pointer_type_t *const pointer_type = &type->pointer;
2299         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2300         ir_node        *      elem_size    = get_type_size_node(points_to);
2301         elem_size                          = create_conv(dbgi, elem_size, mode);
2302         value                              = create_conv(dbgi, value,     mode);
2303         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2304         return mul;
2305 }
2306
2307 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2308                            ir_mode *mode)
2309 {
2310         ir_node *pin = new_Pin(new_NoMem());
2311         ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2312                                  op_pin_state_floats);
2313         return new_d_Proj(dbgi, op, mode, pn_Div_res);
2314 }
2315
2316 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2317 {
2318         ir_mode                *mode;
2319         dbg_info         *const dbgi       = get_dbg_info(&expr->base.pos);
2320         type_t           *const type_left  = skip_typeref(expr->left->base.type);
2321         type_t           *const type_right = skip_typeref(expr->right->base.type);
2322         expression_kind_t const kind       = expr->base.kind;
2323         switch (kind) {
2324         case EXPR_BINARY_SHIFTLEFT:
2325         case EXPR_BINARY_SHIFTRIGHT:
2326         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2327         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2328                 mode  = get_ir_mode_arithmetic(expr->base.type);
2329                 left  = create_conv(dbgi, left,  mode);
2330                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2331                 break;
2332
2333         case EXPR_BINARY_SUB:
2334                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2335                         const pointer_type_t *const ptr_type = &type_left->pointer;
2336
2337                         mode = get_ir_mode_storage(expr->base.type);
2338                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2339                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2340                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2341                         ir_node *const no_mem    = new_NoMem();
2342                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2343                                                                                                    mode, op_pin_state_floats);
2344                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2345                 }
2346                 /* fallthrough */
2347         case EXPR_BINARY_SUB_ASSIGN:
2348                 if (is_type_pointer(type_left)) {
2349                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2350                         mode  = get_ir_mode_storage(type_left);
2351                         break;
2352                 }
2353                 goto normal_node;
2354
2355         case EXPR_BINARY_ADD:
2356         case EXPR_BINARY_ADD_ASSIGN:
2357                 if (is_type_pointer(type_left)) {
2358                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2359                         mode  = get_ir_mode_storage(type_left);
2360                         break;
2361                 } else if (is_type_pointer(type_right)) {
2362                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2363                         mode  = get_ir_mode_storage(type_right);
2364                         break;
2365                 }
2366                 goto normal_node;
2367
2368         default:
2369 normal_node:
2370                 mode  = get_ir_mode_arithmetic(type_right);
2371                 left  = create_conv(dbgi, left,  mode);
2372                 right = create_conv(dbgi, right, mode);
2373                 break;
2374         }
2375
2376         switch (kind) {
2377         case EXPR_BINARY_ADD_ASSIGN:
2378         case EXPR_BINARY_ADD:
2379                 return new_d_Add(dbgi, left, right, mode);
2380         case EXPR_BINARY_SUB_ASSIGN:
2381         case EXPR_BINARY_SUB:
2382                 return new_d_Sub(dbgi, left, right, mode);
2383         case EXPR_BINARY_MUL_ASSIGN:
2384         case EXPR_BINARY_MUL:
2385                 return new_d_Mul(dbgi, left, right, mode);
2386         case EXPR_BINARY_DIV:
2387         case EXPR_BINARY_DIV_ASSIGN:
2388                 return create_div(dbgi, left, right, mode);
2389         case EXPR_BINARY_BITWISE_AND:
2390         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2391                 return new_d_And(dbgi, left, right, mode);
2392         case EXPR_BINARY_BITWISE_OR:
2393         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2394                 return new_d_Or(dbgi, left, right, mode);
2395         case EXPR_BINARY_BITWISE_XOR:
2396         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2397                 return new_d_Eor(dbgi, left, right, mode);
2398         case EXPR_BINARY_SHIFTLEFT:
2399         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2400                 return new_d_Shl(dbgi, left, right, mode);
2401         case EXPR_BINARY_SHIFTRIGHT:
2402         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2403                 if (mode_is_signed(mode)) {
2404                         return new_d_Shrs(dbgi, left, right, mode);
2405                 } else {
2406                         return new_d_Shr(dbgi, left, right, mode);
2407                 }
2408         case EXPR_BINARY_MOD:
2409         case EXPR_BINARY_MOD_ASSIGN: {
2410                 ir_node *pin = new_Pin(new_NoMem());
2411                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2412                                          op_pin_state_floats);
2413                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2414                 return res;
2415         }
2416         default:
2417                 panic("unexpected expression kind");
2418         }
2419 }
2420
2421 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2422 {
2423         ir_node *const left  = expression_to_value(expr->left);
2424         ir_node *const right = expression_to_value(expr->right);
2425         return create_op(expr, left, right);
2426 }
2427
2428 /**
2429  * Check if a given expression is a GNU __builtin_expect() call.
2430  */
2431 static bool is_builtin_expect(const expression_t *expression)
2432 {
2433         if (expression->kind != EXPR_CALL)
2434                 return false;
2435
2436         expression_t *function = expression->call.function;
2437         if (function->kind != EXPR_REFERENCE)
2438                 return false;
2439         reference_expression_t *ref = &function->reference;
2440         if (ref->entity->kind         != ENTITY_FUNCTION ||
2441             ref->entity->function.btk != BUILTIN_EXPECT)
2442                 return false;
2443
2444         return true;
2445 }
2446
2447 static void compare_to_control_flow(expression_t const *const expr, ir_node *const left, ir_node *const right, ir_relation const relation, jump_target *const true_target, jump_target *const false_target)
2448 {
2449         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2450         ir_node  *const cmp  = new_d_Cmp(dbgi, left, right, relation);
2451         if (is_Const(cmp)) {
2452                 if (tarval_is_null(get_Const_tarval(cmp))) {
2453                         jump_to_target(false_target);
2454                 } else {
2455                         jump_to_target(true_target);
2456                 }
2457         } else {
2458                 ir_node *const cond       = new_d_Cond(dbgi, cmp);
2459                 ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2460                 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2461
2462                 /* set branch prediction info based on __builtin_expect */
2463                 if (is_builtin_expect(expr) && is_Cond(cond)) {
2464                         call_argument_t *const argument = expr->call.arguments->next;
2465                         if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2466                                 bool               const cnst = fold_constant_to_bool(argument->expression);
2467                                 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2468                                 set_Cond_jmp_pred(cond, pred);
2469                         }
2470                 }
2471
2472                 add_pred_to_jump_target(true_target,  true_proj);
2473                 add_pred_to_jump_target(false_target, false_proj);
2474         }
2475         set_unreachable_now();
2476 }
2477
2478 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2479 {
2480         ir_node        *val  = NULL;
2481         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2482         ir_mode  *const mode = get_ir_mode_storage(expr->base.type);
2483         jump_target     exit_target;
2484         init_jump_target(&exit_target, NULL);
2485
2486         if (enter_jump_target(true_target)) {
2487                 jump_to_target(&exit_target);
2488                 val = new_d_Const(dbgi, get_mode_one(mode));
2489         }
2490
2491         if (enter_jump_target(false_target)) {
2492                 jump_to_target(&exit_target);
2493                 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2494                 if (val) {
2495                         ir_node *const in[] = { val, zero };
2496                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2497                 } else {
2498                         val = zero;
2499                 }
2500         }
2501
2502         if (!enter_jump_target(&exit_target)) {
2503                 set_cur_block(new_Block(0, NULL));
2504                 val = new_d_Bad(dbgi, mode);
2505         }
2506         return val;
2507 }
2508
2509 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2510 {
2511         ir_node            *const right     = expression_to_value(expr->right);
2512         expression_t const *const left_expr = expr->left;
2513         ir_node            *const addr      = expression_to_addr(left_expr);
2514         ir_node            *const left      = get_value_from_lvalue(left_expr, addr);
2515         ir_node                  *result    = create_op(expr, left, right);
2516
2517         type_t *const type = skip_typeref(expr->base.type);
2518         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2519                 jump_target true_target;
2520                 jump_target false_target;
2521                 init_jump_target(&true_target,  NULL);
2522                 init_jump_target(&false_target, NULL);
2523                 ir_mode *const mode = get_irn_mode(result);
2524                 ir_node *const zero = new_Const(get_mode_null(mode));
2525                 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2526                 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2527         }
2528
2529         return set_value_for_expression_addr(left_expr, result, addr);
2530 }
2531
2532 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2533 {
2534         ir_node *const addr  = expression_to_addr(expr->left);
2535         ir_node *const right = expression_to_value(expr->right);
2536         return set_value_for_expression_addr(expr->left, right, addr);
2537 }
2538
2539 /** evaluate an expression and discard the result, but still produce the
2540  * side-effects. */
2541 static void evaluate_expression_discard_result(const expression_t *expression)
2542 {
2543         type_t *type = skip_typeref(expression->base.type);
2544         if (is_type_complex(type)) {
2545                 expression_to_complex(expression);
2546         } else {
2547                 expression_to_value(expression);
2548         }
2549 }
2550
2551 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2552 {
2553         evaluate_expression_discard_result(expr->left);
2554         return expression_to_value(expr->right);
2555 }
2556
2557 static ir_node *array_access_addr(const array_access_expression_t *expression)
2558 {
2559         dbg_info *dbgi        = get_dbg_info(&expression->base.pos);
2560         ir_node  *base_addr   = expression_to_value(expression->array_ref);
2561         ir_node  *offset      = expression_to_value(expression->index);
2562         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2563         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2564         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2565
2566         return result;
2567 }
2568
2569 static ir_node *array_access_to_firm(
2570                 const array_access_expression_t *expression)
2571 {
2572         dbg_info *dbgi   = get_dbg_info(&expression->base.pos);
2573         ir_node  *addr   = array_access_addr(expression);
2574         type_t   *type   = revert_automatic_type_conversion(
2575                         (const expression_t*) expression);
2576         type             = skip_typeref(type);
2577
2578         return deref_address(dbgi, type, addr);
2579 }
2580
2581 static long get_offsetof_offset(const offsetof_expression_t *expression)
2582 {
2583         type_t *orig_type = expression->type;
2584         long    offset    = 0;
2585
2586         designator_t *designator = expression->designator;
2587         for ( ; designator != NULL; designator = designator->next) {
2588                 type_t *type = skip_typeref(orig_type);
2589                 /* be sure the type is constructed */
2590                 (void) get_ir_type(type);
2591
2592                 if (designator->symbol != NULL) {
2593                         assert(is_type_compound(type));
2594                         symbol_t *symbol = designator->symbol;
2595
2596                         compound_t *compound = type->compound.compound;
2597                         entity_t   *iter     = compound->members.entities;
2598                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2599
2600                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2601                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2602                         offset += get_entity_offset(iter->compound_member.entity);
2603
2604                         orig_type = iter->declaration.type;
2605                 } else {
2606                         expression_t *array_index = designator->array_index;
2607                         assert(designator->array_index != NULL);
2608                         assert(is_type_array(type));
2609
2610                         long index         = fold_constant_to_int(array_index);
2611                         ir_type *arr_type  = get_ir_type(type);
2612                         ir_type *elem_type = get_array_element_type(arr_type);
2613                         long     elem_size = get_type_size_bytes(elem_type);
2614
2615                         offset += index * elem_size;
2616
2617                         orig_type = type->array.element_type;
2618                 }
2619         }
2620
2621         return offset;
2622 }
2623
2624 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2625 {
2626         ir_mode   *mode   = get_ir_mode_storage(expression->base.type);
2627         long       offset = get_offsetof_offset(expression);
2628         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2629         dbg_info  *dbgi   = get_dbg_info(&expression->base.pos);
2630
2631         return new_d_Const(dbgi, tv);
2632 }
2633
2634 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2635                                      ir_entity *entity, type_t *type);
2636 static ir_initializer_t *create_ir_initializer(
2637                 const initializer_t *initializer, type_t *type);
2638
2639 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2640                                             initializer_t *initializer,
2641                                             type_t *type)
2642 {
2643         /* create the ir_initializer */
2644         PUSH_IRG(get_const_code_irg());
2645         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2646         POP_IRG();
2647
2648         ident     *const id          = id_unique("initializer.%u");
2649         ir_type   *const irtype      = get_ir_type(type);
2650         ir_type   *const global_type = get_glob_type();
2651         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2652         set_entity_ld_ident(entity, id);
2653         set_entity_visibility(entity, ir_visibility_private);
2654         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2655         set_entity_initializer(entity, irinitializer);
2656         return entity;
2657 }
2658
2659 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2660 {
2661         dbg_info      *dbgi        = get_dbg_info(&expression->base.pos);
2662         type_t        *type        = expression->type;
2663         initializer_t *initializer = expression->initializer;
2664
2665         if (expression->global_scope ||
2666                 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2667             && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2668                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2669                 return create_symconst(dbgi, entity);
2670         } else {
2671                 /* create an entity on the stack */
2672                 ident   *const id     = id_unique("CompLit.%u");
2673                 ir_type *const irtype = get_ir_type(type);
2674                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2675
2676                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2677                 set_entity_ld_ident(entity, id);
2678
2679                 /* create initialisation code */
2680                 create_local_initializer(initializer, dbgi, entity, type);
2681
2682                 /* create a sel for the compound literal address */
2683                 ir_node *frame = get_irg_frame(current_ir_graph);
2684                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2685                 return sel;
2686         }
2687 }
2688
2689 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2690 {
2691         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2692         type_t   *const type = expr->type;
2693         ir_node  *const addr = compound_literal_addr(expr);
2694         return deref_address(dbgi, type, addr);
2695 }
2696
2697 /**
2698  * Transform a sizeof expression into Firm code.
2699  */
2700 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2701 {
2702         type_t *const type = skip_typeref(expression->type);
2703         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2704         if (is_type_array(type) && type->array.is_vla
2705                         && expression->tp_expression != NULL) {
2706                 expression_to_value(expression->tp_expression);
2707         }
2708
2709         return get_type_size_node(type);
2710 }
2711
2712 static entity_t *get_expression_entity(const expression_t *expression)
2713 {
2714         if (expression->kind != EXPR_REFERENCE)
2715                 return NULL;
2716
2717         return expression->reference.entity;
2718 }
2719
2720 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2721 {
2722         switch (entity->kind) {
2723         case DECLARATION_KIND_CASES:
2724                 return entity->declaration.alignment;
2725         case ENTITY_STRUCT:
2726         case ENTITY_UNION:
2727                 return entity->compound.alignment;
2728         case ENTITY_TYPEDEF:
2729                 return entity->typedefe.alignment;
2730         default:
2731                 break;
2732         }
2733         return 0;
2734 }
2735
2736 /**
2737  * Transform an alignof expression into Firm code.
2738  */
2739 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2740 {
2741         unsigned alignment = 0;
2742
2743         const expression_t *tp_expression = expression->tp_expression;
2744         if (tp_expression != NULL) {
2745                 entity_t *entity = get_expression_entity(tp_expression);
2746                 if (entity != NULL) {
2747                         alignment = get_cparser_entity_alignment(entity);
2748                 }
2749         }
2750
2751         if (alignment == 0) {
2752                 type_t *type = expression->type;
2753                 alignment = get_type_alignment(type);
2754         }
2755
2756         dbg_info  *dbgi = get_dbg_info(&expression->base.pos);
2757         ir_mode   *mode = get_ir_mode_storage(expression->base.type);
2758         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2759         return new_d_Const(dbgi, tv);
2760 }
2761
2762 static void init_ir_types(void);
2763
2764 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2765 {
2766         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2767
2768         bool constant_folding_old = constant_folding;
2769         constant_folding = true;
2770         int old_optimize         = get_optimize();
2771         int old_constant_folding = get_opt_constant_folding();
2772         set_optimize(1);
2773         set_opt_constant_folding(1);
2774
2775         init_ir_types();
2776
2777         PUSH_IRG(get_const_code_irg());
2778         ir_node *const cnst = expression_to_value(expression);
2779         POP_IRG();
2780
2781         set_optimize(old_optimize);
2782         set_opt_constant_folding(old_constant_folding);
2783         constant_folding = constant_folding_old;
2784
2785         if (!is_Const(cnst))
2786                 panic("couldn't fold constant");
2787         return get_Const_tarval(cnst);
2788 }
2789
2790 static complex_constant fold_complex_constant(const expression_t *expression)
2791 {
2792         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2793
2794         bool constant_folding_old = constant_folding;
2795         constant_folding = true;
2796         int old_optimize         = get_optimize();
2797         int old_constant_folding = get_opt_constant_folding();
2798         set_optimize(1);
2799         set_opt_constant_folding(1);
2800
2801         init_ir_types();
2802
2803         PUSH_IRG(get_const_code_irg());
2804         complex_value value = expression_to_complex(expression);
2805         POP_IRG();
2806
2807         set_optimize(old_optimize);
2808         set_opt_constant_folding(old_constant_folding);
2809
2810         if (!is_Const(value.real) || !is_Const(value.imag)) {
2811                 panic("couldn't fold constant");
2812         }
2813
2814         constant_folding = constant_folding_old;
2815
2816         return (complex_constant) {
2817                 get_Const_tarval(value.real),
2818                 get_Const_tarval(value.imag)
2819         };
2820 }
2821
2822 /* this function is only used in parser.c, but it relies on libfirm functionality */
2823 bool constant_is_negative(const expression_t *expression)
2824 {
2825         ir_tarval *tv = fold_constant_to_tarval(expression);
2826         return tarval_is_negative(tv);
2827 }
2828
2829 long fold_constant_to_int(const expression_t *expression)
2830 {
2831         ir_tarval *tv = fold_constant_to_tarval(expression);
2832         if (!tarval_is_long(tv)) {
2833                 panic("result of constant folding is not integer");
2834         }
2835
2836         return get_tarval_long(tv);
2837 }
2838
2839 bool fold_constant_to_bool(const expression_t *expression)
2840 {
2841         type_t *type = skip_typeref(expression->base.type);
2842         if (is_type_complex(type)) {
2843                 complex_constant tvs = fold_complex_constant(expression);
2844                 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2845         } else {
2846                 ir_tarval *tv = fold_constant_to_tarval(expression);
2847                 return !tarval_is_null(tv);
2848         }
2849 }
2850
2851 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2852 {
2853         jump_target true_target;
2854         jump_target false_target;
2855         init_jump_target(&true_target,  NULL);
2856         init_jump_target(&false_target, NULL);
2857         ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2858
2859         ir_node        *val  = NULL;
2860         dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2861         type_t   *const type = skip_typeref(expression->base.type);
2862         ir_mode  *const mode = get_ir_mode_arithmetic(type);
2863         jump_target exit_target;
2864         init_jump_target(&exit_target, NULL);
2865
2866         if (enter_jump_target(&true_target)) {
2867                 if (expression->true_expression) {
2868                         val = expression_to_value(expression->true_expression);
2869                 } else if (cond_expr) {
2870                         val = cond_expr;
2871                 } else {
2872                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2873                          * comparison.  Generate a "1" as value for the true branch. */
2874                         val = new_Const(get_mode_one(mode));
2875                 }
2876                 if (val)
2877                         val = create_conv(dbgi, val, mode);
2878                 jump_to_target(&exit_target);
2879         }
2880
2881         if (enter_jump_target(&false_target)) {
2882                 ir_node *false_val = expression_to_value(expression->false_expression);
2883                 if (false_val)
2884                         false_val = create_conv(dbgi, false_val, mode);
2885                 jump_to_target(&exit_target);
2886                 if (val) {
2887                         ir_node *const in[] = { val, false_val };
2888                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2889                 } else {
2890                         val = false_val;
2891                 }
2892         }
2893
2894         if (!enter_jump_target(&exit_target)) {
2895                 set_cur_block(new_Block(0, NULL));
2896                 if (!is_type_void(type))
2897                         val = new_Bad(mode);
2898         }
2899         return val;
2900 }
2901
2902 /**
2903  * Returns an IR-node representing the address of a field.
2904  */
2905 static ir_node *select_addr(const select_expression_t *expression)
2906 {
2907         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2908
2909         construct_select_compound(expression);
2910
2911         ir_node *compound_addr = expression_to_value(expression->compound);
2912
2913         entity_t *entry = expression->compound_entry;
2914         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2915         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2916
2917         if (constant_folding) {
2918                 ir_mode *mode      = get_irn_mode(compound_addr);
2919                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2920                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2921                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2922         } else {
2923                 ir_entity *irentity = entry->compound_member.entity;
2924                 assert(irentity != NULL);
2925                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2926         }
2927 }
2928
2929 static ir_node *select_to_firm(const select_expression_t *expression)
2930 {
2931         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2932         ir_node  *addr = select_addr(expression);
2933         type_t   *type = revert_automatic_type_conversion(
2934                         (const expression_t*) expression);
2935         type           = skip_typeref(type);
2936
2937         entity_t *entry = expression->compound_entry;
2938         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2939
2940         if (entry->compound_member.bitfield) {
2941                 return bitfield_extract_to_firm(expression, addr);
2942         }
2943
2944         return deref_address(dbgi, type, addr);
2945 }
2946
2947 /* Values returned by __builtin_classify_type. */
2948 typedef enum gcc_type_class
2949 {
2950         no_type_class = -1,
2951         void_type_class,
2952         integer_type_class,
2953         char_type_class,
2954         enumeral_type_class,
2955         boolean_type_class,
2956         pointer_type_class,
2957         reference_type_class,
2958         offset_type_class,
2959         real_type_class,
2960         complex_type_class,
2961         function_type_class,
2962         method_type_class,
2963         record_type_class,
2964         union_type_class,
2965         array_type_class,
2966         string_type_class,
2967         set_type_class,
2968         file_type_class,
2969         lang_type_class
2970 } gcc_type_class;
2971
2972 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2973 {
2974         type_t *type = expr->type_expression->base.type;
2975
2976         /* FIXME gcc returns different values depending on whether compiling C or C++
2977          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2978         gcc_type_class tc;
2979         for (;;) {
2980                 type = skip_typeref(type);
2981                 switch (type->kind) {
2982                         case TYPE_ATOMIC: {
2983                                 const atomic_type_t *const atomic_type = &type->atomic;
2984                                 switch (atomic_type->akind) {
2985                                         /* gcc cannot do that */
2986                                         case ATOMIC_TYPE_VOID:
2987                                                 tc = void_type_class;
2988                                                 goto make_const;
2989
2990                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2991                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2992                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2993                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2994                                         case ATOMIC_TYPE_SHORT:
2995                                         case ATOMIC_TYPE_USHORT:
2996                                         case ATOMIC_TYPE_INT:
2997                                         case ATOMIC_TYPE_UINT:
2998                                         case ATOMIC_TYPE_LONG:
2999                                         case ATOMIC_TYPE_ULONG:
3000                                         case ATOMIC_TYPE_LONGLONG:
3001                                         case ATOMIC_TYPE_ULONGLONG:
3002                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3003                                                 tc = integer_type_class;
3004                                                 goto make_const;
3005
3006                                         case ATOMIC_TYPE_FLOAT:
3007                                         case ATOMIC_TYPE_DOUBLE:
3008                                         case ATOMIC_TYPE_LONG_DOUBLE:
3009                                                 tc = real_type_class;
3010                                                 goto make_const;
3011                                 }
3012                                 panic("Unexpected atomic type.");
3013                         }
3014
3015                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3016                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3017                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3018                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3019                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3020                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3021                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3022
3023                         /* gcc handles this as integer */
3024                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3025
3026                         /* gcc classifies the referenced type */
3027                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3028
3029                         /* typedef/typeof should be skipped already */
3030                         case TYPE_TYPEDEF:
3031                         case TYPE_TYPEOF:
3032                         case TYPE_ERROR:
3033                                 break;
3034                 }
3035                 panic("unexpected type.");
3036         }
3037
3038 make_const:;
3039         dbg_info  *const dbgi = get_dbg_info(&expr->base.pos);
3040         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3041         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3042         return new_d_Const(dbgi, tv);
3043 }
3044
3045 static ir_node *function_name_to_firm(
3046                 const funcname_expression_t *const expr)
3047 {
3048         switch (expr->kind) {
3049         case FUNCNAME_FUNCTION:
3050         case FUNCNAME_PRETTY_FUNCTION:
3051         case FUNCNAME_FUNCDNAME:
3052                 if (current_function_name == NULL) {
3053                         position_t const *const src_pos = &expr->base.pos;
3054                         char       const *const name    = current_function_entity->base.symbol->string;
3055                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3056                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3057                 }
3058                 return current_function_name;
3059         case FUNCNAME_FUNCSIG:
3060                 if (current_funcsig == NULL) {
3061                         position_t const *const src_pos = &expr->base.pos;
3062                         ir_entity        *const ent     = get_irg_entity(current_ir_graph);
3063                         char       const *const name    = get_entity_ld_name(ent);
3064                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3065                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3066                 }
3067                 return current_funcsig;
3068         }
3069         panic("Unsupported function name");
3070 }
3071
3072 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3073 {
3074         statement_t *statement = expr->statement;
3075
3076         assert(statement->kind == STATEMENT_COMPOUND);
3077         return compound_statement_to_firm(&statement->compound);
3078 }
3079
3080 static ir_node *va_start_expression_to_firm(
3081         const va_start_expression_t *const expr)
3082 {
3083         ir_entity *param_ent = current_vararg_entity;
3084         if (param_ent == NULL) {
3085                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3086                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3087                 ir_type *const param_type  = get_unknown_type();
3088                 param_ent = new_parameter_entity(frame_type, n, param_type);
3089                 current_vararg_entity = param_ent;
3090         }
3091
3092         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3093         dbg_info *const dbgi    = get_dbg_info(&expr->base.pos);
3094         ir_node  *const no_mem  = new_NoMem();
3095         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3096
3097         set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3098
3099         return NULL;
3100 }
3101
3102 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3103 {
3104         type_t       *const type    = expr->base.type;
3105         expression_t *const ap_expr = expr->ap;
3106         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3107         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3108         dbg_info     *const dbgi    = get_dbg_info(&expr->base.pos);
3109         ir_node      *const res     = deref_address(dbgi, type, ap);
3110
3111         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3112         ir_mode      *const mode    = get_irn_mode(cnst);
3113         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3114         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3115         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3116         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3117         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3118
3119         set_value_for_expression_addr(ap_expr, add, ap_addr);
3120
3121         return res;
3122 }
3123
3124 /**
3125  * Generate Firm for a va_copy expression.
3126  */
3127 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3128 {
3129         ir_node *const src = expression_to_value(expr->src);
3130         set_value_for_expression_addr(expr->dst, src, NULL);
3131         return NULL;
3132 }
3133
3134 static ir_node *dereference_addr(const unary_expression_t *const expression)
3135 {
3136         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3137         return expression_to_value(expression->value);
3138 }
3139
3140 /**
3141  * Returns a IR-node representing an lvalue of the given expression.
3142  */
3143 static ir_node *expression_to_addr(const expression_t *expression)
3144 {
3145         switch (expression->kind) {
3146         case EXPR_ARRAY_ACCESS:
3147                 return array_access_addr(&expression->array_access);
3148         case EXPR_COMPOUND_LITERAL:
3149                 return compound_literal_addr(&expression->compound_literal);
3150         case EXPR_REFERENCE:
3151                 return reference_addr(&expression->reference);
3152         case EXPR_SELECT:
3153                 return select_addr(&expression->select);
3154         case EXPR_UNARY_DEREFERENCE:
3155                 return dereference_addr(&expression->unary);
3156         default:
3157                 break;
3158         }
3159         panic("trying to get address of non-lvalue");
3160 }
3161
3162 static ir_node *builtin_constant_to_firm(
3163                 const builtin_constant_expression_t *expression)
3164 {
3165         ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3166         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3167         return create_Const_from_bool(mode, v);
3168 }
3169
3170 static ir_node *builtin_types_compatible_to_firm(
3171                 const builtin_types_compatible_expression_t *expression)
3172 {
3173         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3174         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3175         bool     const value = types_compatible(left, right);
3176         ir_mode *const mode  = get_ir_mode_storage(expression->base.type);
3177         return create_Const_from_bool(mode, value);
3178 }
3179
3180 static void prepare_label_target(label_t *const label)
3181 {
3182         if (label->address_taken && !label->indirect_block) {
3183                 ir_node *const iblock = new_immBlock();
3184                 label->indirect_block = iblock;
3185                 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3186                 jump_from_block_to_target(&label->target, iblock);
3187         }
3188 }
3189
3190 /**
3191  * Pointer to a label.  This is used for the
3192  * GNU address-of-label extension.
3193  */
3194 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3195 {
3196         /* Beware: Might be called from create initializer with current_ir_graph
3197          * set to const_code_irg. */
3198         PUSH_IRG(current_function);
3199         prepare_label_target(label->label);
3200         POP_IRG();
3201
3202         symconst_symbol value;
3203         value.entity_p = create_Block_entity(label->label->indirect_block);
3204         dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3205         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3206 }
3207
3208 static ir_node *expression_to_value(expression_t const *const expr)
3209 {
3210 #ifndef NDEBUG
3211         if (!constant_folding) {
3212                 assert(!expr->base.transformed);
3213                 ((expression_t*)expr)->base.transformed = true;
3214         }
3215         assert(!is_type_complex(skip_typeref(expr->base.type)));
3216 #endif
3217
3218         switch (expr->kind) {
3219         case EXPR_UNARY_CAST:
3220                 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3221         case EXPR_BINARY_EQUAL:
3222         case EXPR_BINARY_GREATER:
3223         case EXPR_BINARY_GREATEREQUAL:
3224         case EXPR_BINARY_ISGREATER:
3225         case EXPR_BINARY_ISGREATEREQUAL:
3226         case EXPR_BINARY_ISLESS:
3227         case EXPR_BINARY_ISLESSEQUAL:
3228         case EXPR_BINARY_ISLESSGREATER:
3229         case EXPR_BINARY_ISUNORDERED:
3230         case EXPR_BINARY_LESS:
3231         case EXPR_BINARY_LESSEQUAL:
3232         case EXPR_BINARY_LOGICAL_AND:
3233         case EXPR_BINARY_LOGICAL_OR:
3234         case EXPR_BINARY_NOTEQUAL:
3235         case EXPR_UNARY_NOT:;
3236                         jump_target true_target;
3237                         jump_target false_target;
3238                         init_jump_target(&true_target,  NULL);
3239                         init_jump_target(&false_target, NULL);
3240                         expression_to_control_flow(expr, &true_target, &false_target);
3241                         return control_flow_to_1_0(expr, &true_target, &false_target);
3242                 } else {
3243                         return create_cast(&expr->unary);
3244                 }
3245
3246         case EXPR_BINARY_ADD:
3247         case EXPR_BINARY_BITWISE_AND:
3248         case EXPR_BINARY_BITWISE_OR:
3249         case EXPR_BINARY_BITWISE_XOR:
3250         case EXPR_BINARY_DIV:
3251         case EXPR_BINARY_MOD:
3252         case EXPR_BINARY_MUL:
3253         case EXPR_BINARY_SHIFTLEFT:
3254         case EXPR_BINARY_SHIFTRIGHT:
3255         case EXPR_BINARY_SUB:
3256                 return binop_to_firm(&expr->binary);
3257
3258         case EXPR_BINARY_ADD_ASSIGN:
3259         case EXPR_BINARY_BITWISE_AND_ASSIGN:
3260         case EXPR_BINARY_BITWISE_OR_ASSIGN:
3261         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3262         case EXPR_BINARY_DIV_ASSIGN:
3263         case EXPR_BINARY_MOD_ASSIGN:
3264         case EXPR_BINARY_MUL_ASSIGN:
3265         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3266         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3267         case EXPR_BINARY_SUB_ASSIGN:
3268                 return binop_assign_to_firm(&expr->binary);
3269
3270         {
3271                 bool inc;
3272                 bool pre;
3273         case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3274         case EXPR_UNARY_POSTFIX_INCREMENT: inc = true;  pre = false; goto incdec;
3275         case EXPR_UNARY_PREFIX_DECREMENT:  inc = false; pre = true;  goto incdec;
3276         case EXPR_UNARY_PREFIX_INCREMENT:  inc = true;  pre = true;  goto incdec;
3277 incdec:
3278                 return incdec_to_firm(&expr->unary, inc, pre);
3279         }
3280
3281         case EXPR_UNARY_IMAG: {
3282                 complex_value irvalue = expression_to_complex(expr->unary.value);
3283                 return irvalue.imag;
3284         }
3285         case EXPR_UNARY_REAL: {
3286                 complex_value irvalue = expression_to_complex(expr->unary.value);
3287                 return irvalue.real;
3288         }
3289
3290         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3291         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3292         case EXPR_BINARY_ASSIGN:              return assign_expression_to_firm(       &expr->binary);
3293         case EXPR_BINARY_COMMA:               return comma_expression_to_firm(        &expr->binary);
3294         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3295         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3296         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3297         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3298         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3299         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3300         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3301         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3302         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3303         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3304         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3305         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3306         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3307         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3308         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3309         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3310         case EXPR_STRING_LITERAL:             return string_to_firm(                  &expr->base.pos, "str.%u", &expr->string_literal.value);
3311         case EXPR_UNARY_ASSUME:               return handle_assume(                    expr->unary.value);
3312         case EXPR_UNARY_COMPLEMENT:           return complement_to_firm(              &expr->unary);
3313         case EXPR_UNARY_DEREFERENCE:          return dereference_to_firm(             &expr->unary);
3314         case EXPR_UNARY_NEGATE:               return negate_to_firm(                  &expr->unary);
3315         case EXPR_UNARY_PLUS:                 return expression_to_value(              expr->unary.value);
3316         case EXPR_UNARY_TAKE_ADDRESS:         return expression_to_addr(               expr->unary.value);
3317         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3318         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3319         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3320
3321         case EXPR_UNARY_DELETE:
3322         case EXPR_UNARY_DELETE_ARRAY:
3323         case EXPR_UNARY_THROW:
3324                 panic("expression not implemented");
3325
3326         case EXPR_ERROR:
3327                 break;
3328         }
3329         panic("invalid expression");
3330 }
3331
3332 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3333         jump_target *const true_target, jump_target *const false_target,
3334         ir_relation relation);
3335
3336 static complex_value create_complex_condition_evaluation(
3337         const expression_t *const expression, jump_target *const true_target,
3338         jump_target *const false_target);
3339
3340 /**
3341  * create a short-circuit expression evaluation that tries to construct
3342  * efficient control flow structures for &&, || and ! expressions
3343  */
3344 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3345 {
3346         switch (expr->kind) {
3347         case EXPR_UNARY_NOT:
3348                 expression_to_control_flow(expr->unary.value, false_target, true_target);
3349                 return NULL;
3350
3351         case EXPR_BINARY_LOGICAL_AND: {
3352                 jump_target extra_target;
3353                 init_jump_target(&extra_target, NULL);
3354                 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3355                 if (enter_jump_target(&extra_target))
3356                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3357                 return NULL;
3358         }
3359
3360         case EXPR_BINARY_LOGICAL_OR: {
3361                 jump_target extra_target;
3362                 init_jump_target(&extra_target, NULL);
3363                 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3364                 if (enter_jump_target(&extra_target))
3365                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3366                 return NULL;
3367         }
3368
3369         case EXPR_BINARY_COMMA:
3370                 evaluate_expression_discard_result(expr->binary.left);
3371                 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3372
3373                 ir_node    *val;
3374                 ir_node    *left;
3375                 ir_node    *right;
3376                 ir_relation relation;
3377
3378         case EXPR_BINARY_EQUAL:
3379         case EXPR_BINARY_GREATER:
3380         case EXPR_BINARY_GREATEREQUAL:
3381         case EXPR_BINARY_ISGREATER:
3382         case EXPR_BINARY_ISGREATEREQUAL:
3383         case EXPR_BINARY_ISLESS:
3384         case EXPR_BINARY_ISLESSEQUAL:
3385         case EXPR_BINARY_ISLESSGREATER:
3386         case EXPR_BINARY_ISUNORDERED:
3387         case EXPR_BINARY_LESS:
3388         case EXPR_BINARY_LESSEQUAL:
3389         case EXPR_BINARY_NOTEQUAL: {
3390                 type_t *const type = skip_typeref(expr->binary.left->base.type);
3391                 relation = get_relation(expr->kind);
3392                 if (is_type_complex(type)) {
3393                         complex_equality_evaluation(&expr->binary, true_target,
3394                                                     false_target, relation);
3395                         /* TODO return something sensible */
3396                         return NULL;
3397                 }
3398
3399                 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3400                 ir_mode  *const mode = get_ir_mode_arithmetic(type);
3401                 val      = NULL;
3402                 left     = create_conv(dbgi, expression_to_value(expr->binary.left),  mode);
3403                 right    = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3404                 goto make_cmp;
3405         }
3406
3407         case EXPR_UNARY_CAST:
3408                 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3409                         expression_to_control_flow(expr->unary.value, true_target, false_target);
3410                         return NULL;
3411                 } else {
3412         default:;
3413                         type_t *const type = skip_typeref(expr->base.type);
3414                         if (is_type_complex(type)) {
3415                                 create_complex_condition_evaluation(expr, true_target, false_target);
3416                                 return NULL;
3417                         }
3418
3419                         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3420                         ir_mode  *const mode = get_ir_mode_arithmetic(type);
3421                         val      = create_conv(dbgi, expression_to_value(expr), mode);
3422                         left     = val;
3423                         right    = new_Const(get_mode_null(get_irn_mode(val)));
3424                         relation = ir_relation_unordered_less_greater;
3425 make_cmp:
3426                         compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3427                         return val;
3428                 }
3429         }
3430 }
3431
3432 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3433                                   ir_mode *mode)
3434 {
3435         return (complex_value) {
3436                 create_conv(dbgi, value.real, mode),
3437                 create_conv(dbgi, value.imag, mode)
3438         };
3439 }
3440
3441 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3442         complex_value const value, type_t *const type)
3443 {
3444         ir_mode *const mode = get_complex_mode_storage(type);
3445         return complex_conv(dbgi, value, mode);
3446 }
3447
3448 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3449                           complex_value value)
3450 {
3451         value = complex_conv_to_storage(dbgi, value, type);
3452         ir_graph  *irg       = current_ir_graph;
3453         ir_type   *irtype    = get_ir_type(type);
3454         ir_node   *mem       = get_store();
3455         ir_node   *nomem     = get_irg_no_mem(irg);
3456         ir_mode   *mode      = get_complex_mode_storage(type);
3457         ir_node   *real      = create_conv(dbgi, value.real, mode);
3458         ir_node   *imag      = create_conv(dbgi, value.imag, mode);
3459         ir_node   *storer    = new_d_Store(dbgi, mem, addr, real, cons_floats);
3460         ir_node   *memr      = new_Proj(storer, mode_M, pn_Store_M);
3461         set_store(memr);
3462         ir_node   *mem2      = get_store();
3463         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3464         ir_node   *one       = new_Const(get_mode_one(mode_uint));
3465         ir_node   *in[1]     = { one };
3466         ir_entity *arrent    = get_array_element_entity(irtype);
3467         ir_node   *addri     = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3468         ir_node   *storei    = new_d_Store(dbgi, mem2, addri, imag, cons_floats);
3469         ir_node   *memi      = new_Proj(storei, mode_M, pn_Store_M);
3470         set_store(memi);
3471 }
3472
3473 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3474                                   complex_value value)
3475 {
3476         ir_graph  *irg         = current_ir_graph;
3477         ir_type   *frame_type  = get_irg_frame_type(irg);
3478         ident     *id          = id_unique("cmplex_tmp.%u");
3479         ir_type   *irtype      = get_ir_type(type);
3480         ir_entity *tmp_storage = new_entity(frame_type, id, irtype);
3481         set_entity_compiler_generated(tmp_storage, 1);
3482         ir_node   *frame       = get_irg_frame(irg);
3483         ir_node   *nomem       = get_irg_no_mem(irg);
3484         ir_node   *addr        = new_simpleSel(nomem, frame, tmp_storage);
3485         store_complex(dbgi, addr, type, value);
3486         return addr;
3487 }
3488
3489 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3490 {
3491         assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3492             || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3493         type_t  *const type = skip_typeref(entity->declaration.type);
3494         ir_mode *const mode = get_complex_mode_storage(type);
3495         ir_node *const real = get_value(entity->variable.v.value_number, mode);
3496         ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3497         ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3498         return (complex_value) {
3499                 create_conv(dbgi, real, mode_arithmetic),
3500                 create_conv(dbgi, imag, mode_arithmetic)
3501         };
3502 }
3503
3504 static complex_value complex_deref_address(dbg_info *const dbgi,
3505                                            type_t *type, ir_node *const addr,
3506                                            ir_cons_flags flags)
3507 {
3508         type = skip_typeref(type);
3509         assert(is_type_complex(type));
3510
3511         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3512                 flags |= cons_volatile;
3513         ir_mode *const mode     = get_complex_mode_storage(type);
3514         ir_node *const memory   = get_store();
3515         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
3516         ir_node *const load_mem = new_Proj(load, mode_M, pn_Load_M);
3517         ir_node *const load_res = new_Proj(load, mode,   pn_Load_res);
3518         set_store(load_mem);
3519
3520         ir_type   *const irtype    = get_ir_type(type);
3521         ir_mode   *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3522         ir_node   *const in[1]     = { new_Const(get_mode_one(mode_uint)) };
3523         ir_entity *const entity    = get_array_element_entity(irtype);
3524         ir_node   *const nomem     = get_irg_no_mem(current_ir_graph);
3525         ir_node   *const addr2     = new_Sel(nomem, addr, 1, in, entity);
3526         ir_node   *const mem2      = get_store();
3527         ir_node   *const load2     = new_d_Load(dbgi, mem2, addr2, mode, flags);
3528         ir_node   *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3529         ir_node   *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3530         set_store(load_mem2);
3531
3532         return (complex_value) { load_res, load_res2 };
3533 }
3534
3535 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3536 {
3537         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
3538         entity_t *const entity = ref->entity;
3539         assert(is_declaration(entity));
3540
3541         switch ((declaration_kind_t)entity->declaration.kind) {
3542         case DECLARATION_KIND_LOCAL_VARIABLE:
3543         case DECLARATION_KIND_PARAMETER:
3544                 return read_localvar_complex(dbgi, entity);
3545         default: {
3546                 ir_node *const addr = reference_addr(ref);
3547                 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3548         }
3549         }
3550 }
3551
3552 static complex_value complex_select_to_firm(const select_expression_t *select)
3553 {
3554         dbg_info *dbgi = get_dbg_info(&select->base.pos);
3555         ir_node  *addr = select_addr(select);
3556         type_t   *type = skip_typeref(select->base.type);
3557         assert(is_type_complex(type));
3558         return complex_deref_address(dbgi, type, addr, cons_none);
3559 }
3560
3561 static complex_value complex_array_access_to_firm(
3562         const array_access_expression_t *expression)
3563 {
3564         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3565         ir_node  *addr = array_access_addr(expression);
3566         type_t   *type = skip_typeref(expression->base.type);
3567         assert(is_type_complex(type));
3568         return complex_deref_address(dbgi, type, addr, cons_none);
3569 }
3570
3571 static complex_value get_complex_from_lvalue(const expression_t *expression,
3572                                              ir_node *addr)
3573 {
3574         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3575
3576         if (expression->kind == EXPR_REFERENCE) {
3577                 const reference_expression_t *ref = &expression->reference;
3578
3579                 entity_t *entity = ref->entity;
3580                 assert(entity->kind == ENTITY_VARIABLE
3581                     || entity->kind == ENTITY_PARAMETER);
3582                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3583                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3584                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3585                     return read_localvar_complex(dbgi, entity);
3586                 }
3587         }
3588
3589         assert(addr != NULL);
3590         return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3591 }
3592
3593 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3594 {
3595         const expression_t *value     = expression->value;
3596         dbg_info           *dbgi      = get_dbg_info(&expression->base.pos);
3597         type_t             *from_type = skip_typeref(value->base.type);
3598         type_t             *to_type   = skip_typeref(expression->base.type);
3599         ir_mode            *mode      = get_complex_mode_storage(to_type);
3600
3601         assert(is_type_complex(to_type));
3602
3603         if (is_type_complex(from_type)) {
3604                 complex_value cvalue = expression_to_complex(value);
3605                 return complex_conv(dbgi, cvalue, mode);
3606         } else {
3607                 ir_node *value_node = expression_to_value(value);
3608                 ir_node *zero       = new_Const(get_mode_null(mode));
3609                 ir_node *casted     = create_conv(dbgi, value_node, mode);
3610                 return (complex_value) { casted, zero };
3611         }
3612 }
3613
3614 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3615 {
3616         type_t  *type     = skip_typeref(literal->base.type);
3617         ir_mode *mode     = get_complex_mode_storage(type);
3618         ir_node *litvalue = literal_to_firm_(literal, mode);
3619         ir_node *zero     = new_Const(get_mode_null(mode));
3620         return (complex_value) { zero, litvalue };
3621 }
3622
3623 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3624                                            complex_value right, ir_mode *mode);
3625
3626 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3627                                      complex_value right, ir_mode *mode)
3628 {
3629         return (complex_value) {
3630                 new_d_Add(dbgi, left.real, right.real, mode),
3631                 new_d_Add(dbgi, left.imag, right.imag, mode)
3632         };
3633 }
3634
3635 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3636                                      complex_value right, ir_mode *mode)
3637 {
3638         return (complex_value) {
3639                 new_d_Sub(dbgi, left.real, right.real, mode),
3640                 new_d_Sub(dbgi, left.imag, right.imag, mode)
3641         };
3642 }
3643
3644 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3645                                      complex_value right, ir_mode *mode)
3646 {
3647         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3648         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3649         ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3650         ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3651         return (complex_value) {
3652                 new_d_Sub(dbgi, op1, op2, mode),
3653                 new_d_Add(dbgi, op3, op4, mode)
3654         };
3655 }
3656
3657 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3658                                      complex_value right, ir_mode *mode)
3659 {
3660         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3661         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3662         ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3663         ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3664         ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3665         ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3666         ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3667         ir_node *const real_divisor  = new_d_Add(dbgi, op5, op6, mode);
3668         ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3669         ir_node *const imag_divisor  = new_d_Add(dbgi, op5, op6, mode);
3670         return (complex_value) {
3671                 create_div(dbgi, real_dividend, real_divisor, mode),
3672                 create_div(dbgi, imag_dividend, imag_divisor, mode)
3673         };
3674 }
3675
3676 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3677                                           ir_mode *mode);
3678
3679 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3680                                            ir_mode *mode)
3681 {
3682         ir_node *one = new_Const(get_mode_one(mode));
3683         return (complex_value) {
3684                 new_d_Add(dbgi, value.real, one, mode),
3685                 value.imag
3686         };
3687 }
3688
3689 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3690                                            ir_mode *mode)
3691 {
3692         ir_node *one = new_Const(get_mode_one(mode));
3693         return (complex_value) {
3694                 new_d_Sub(dbgi, value.real, one, mode),
3695                 value.imag
3696         };
3697 }
3698
3699 static void set_complex_value_for_expression(dbg_info *dbgi,
3700                                                                                          const expression_t *expression,
3701                                              complex_value value,
3702                                              ir_node *addr)
3703 {
3704         type_t *type = skip_typeref(expression->base.type);
3705         assert(is_type_complex(type));
3706
3707         ir_mode  *mode = get_complex_mode_storage(type);
3708         ir_node  *real = create_conv(dbgi, value.real, mode);
3709         ir_node  *imag = create_conv(dbgi, value.imag, mode);
3710
3711         if (expression->kind == EXPR_REFERENCE) {
3712                 const reference_expression_t *ref = &expression->reference;
3713
3714                 entity_t *entity = ref->entity;
3715                 assert(is_declaration(entity));
3716                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3717                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3718                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3719                         set_value(entity->variable.v.value_number, real);
3720                         set_value(entity->variable.v.value_number+1, imag);
3721                         return;
3722                 }
3723         }
3724
3725         if (addr == NULL)
3726                 addr = expression_to_addr(expression);
3727         assert(addr != NULL);
3728         store_complex(dbgi, addr, type, value);
3729 }
3730
3731 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3732                                                 new_complex_unop constructor,
3733                                                 bool return_old)
3734 {
3735         dbg_info *const     dbgi       = get_dbg_info(&unop->base.pos);
3736         const expression_t *value_expr = unop->value;
3737         ir_node            *addr       = expression_to_addr(value_expr);
3738         complex_value       value      = get_complex_from_lvalue(value_expr, addr);
3739         type_t             *type       = skip_typeref(unop->base.type);
3740         ir_mode            *mode       = get_complex_mode_arithmetic(type);
3741         value = complex_conv(dbgi, value, mode);
3742         complex_value       new_value  = constructor(dbgi, value, mode);
3743         set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3744         return return_old ? value : new_value;
3745 }
3746
3747 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3748 {
3749         complex_value cvalue = expression_to_complex(expr->value);
3750         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3751         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3752         cvalue = complex_conv(dbgi, cvalue, mode);
3753         return (complex_value) {
3754                 new_d_Minus(dbgi, cvalue.real, mode),
3755                 new_d_Minus(dbgi, cvalue.imag, mode)
3756         };
3757 }
3758
3759 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3760 {
3761         complex_value cvalue = expression_to_complex(expr->value);
3762         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3763         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3764         cvalue = complex_conv(dbgi, cvalue, mode);
3765         return (complex_value) {
3766                 cvalue.real,
3767                 new_d_Minus(dbgi, cvalue.imag, mode)
3768         };
3769 }
3770
3771 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3772                                           new_complex_binop constructor)
3773 {
3774         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3775         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->base.type);
3776         complex_value left  = expression_to_complex(binexpr->left);
3777         complex_value right = expression_to_complex(binexpr->right);
3778         left  = complex_conv(dbgi, left, mode);
3779         right = complex_conv(dbgi, right, mode);
3780         return constructor(dbgi, left, right, mode);
3781 }
3782
3783 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3784                                                  new_complex_binop constructor)
3785 {
3786         dbg_info      *dbgi   = get_dbg_info(&binexpr->base.pos);
3787         expression_t  *lefte  = binexpr->left;
3788         expression_t  *righte = binexpr->right;
3789         ir_mode       *mode   = get_complex_mode_arithmetic(righte->base.type);
3790         ir_node       *addr   = expression_to_addr(lefte);
3791         complex_value  left   = get_complex_from_lvalue(lefte, addr);
3792         complex_value  right  = expression_to_complex(righte);
3793         left  = complex_conv(dbgi, left, mode);
3794         right = complex_conv(dbgi, right, mode);
3795         complex_value  new_value = constructor(dbgi, left, right, mode);
3796         type_t        *res_type  = skip_typeref(binexpr->base.type);
3797         set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3798         return complex_conv_to_storage(dbgi, new_value, res_type);
3799 }
3800
3801 static complex_value complex_call_to_firm(const call_expression_t *call)
3802 {
3803         ir_node         *result        = call_expression_to_firm(call);
3804         expression_t    *function      = call->function;
3805         type_t          *type          = skip_typeref(function->base.type);
3806         assert(is_type_pointer(type));
3807         pointer_type_t  *pointer_type  = &type->pointer;
3808         type_t          *points_to     = skip_typeref(pointer_type->points_to);
3809         assert(is_type_function(points_to));
3810         function_type_t *function_type = &points_to->function;
3811         type_t          *return_type   = skip_typeref(function_type->return_type);
3812         assert(is_type_complex(return_type));
3813         dbg_info        *dbgi          = get_dbg_info(&call->base.pos);
3814         return complex_deref_address(dbgi, return_type, result, cons_floats);
3815 }
3816
3817 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3818         jump_target *const true_target, jump_target *const false_target,
3819         ir_relation relation)
3820 {
3821         jump_target extra_target;
3822         init_jump_target(&extra_target, NULL);
3823
3824         complex_value left  = expression_to_complex(binexpr->left);
3825         complex_value right = expression_to_complex(binexpr->right);
3826         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3827         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->left->base.type);
3828         left  = complex_conv(dbgi, left, mode);
3829         right = complex_conv(dbgi, right, mode);
3830
3831         ir_node  *cmp_real   = new_d_Cmp(dbgi, left.real, right.real, relation);
3832         ir_node  *cond       = new_d_Cond(dbgi, cmp_real);
3833         ir_node  *true_proj  = new_Proj(cond, mode_X, pn_Cond_true);
3834         ir_node  *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3835         add_pred_to_jump_target(&extra_target, true_proj);
3836         add_pred_to_jump_target(false_target, false_proj);
3837         if (!enter_jump_target(&extra_target))
3838                 return;
3839
3840         ir_node *cmp_imag     = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3841         ir_node *condi        = new_d_Cond(dbgi, cmp_imag);
3842         ir_node *true_proj_i  = new_Proj(condi, mode_X, pn_Cond_true);
3843         ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3844         add_pred_to_jump_target(true_target, true_proj_i);
3845         add_pred_to_jump_target(false_target, false_proj_i);
3846         set_unreachable_now();
3847 }
3848
3849 static complex_value create_complex_condition_evaluation(
3850         const expression_t *const expression, jump_target *const true_target,
3851         jump_target *const false_target)
3852 {
3853         jump_target extra_target;
3854         init_jump_target(&extra_target, NULL);
3855         complex_value       value      = expression_to_complex(expression);
3856         dbg_info     *const dbgi       = get_dbg_info(&expression->base.pos);
3857         type_t       *const type       = expression->base.type;
3858         ir_mode      *const mode       = get_complex_mode_arithmetic(type);
3859         value = complex_conv(dbgi, value, mode);
3860         ir_node      *const zero       = new_Const(get_mode_null(mode));
3861         ir_node      *const cmp_real   =
3862                 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3863         ir_node      *const cond_real  = new_d_Cond(dbgi, cmp_real);
3864         ir_node      *const true_real  = new_Proj(cond_real, mode_X, pn_Cond_true);
3865         ir_node      *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3866         add_pred_to_jump_target(true_target, true_real);
3867         add_pred_to_jump_target(&extra_target, false_real);
3868         if (!enter_jump_target(&extra_target))
3869                 return value;
3870
3871         ir_node      *const cmp_imag   =
3872                 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3873         ir_node      *const cond_imag  = new_d_Cond(dbgi, cmp_imag);
3874         ir_node      *const true_imag  = new_Proj(cond_imag, mode_X, pn_Cond_true);
3875         ir_node      *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3876         add_pred_to_jump_target(true_target, true_imag);
3877         add_pred_to_jump_target(false_target, false_imag);
3878         set_unreachable_now();
3879
3880         return value;
3881 }
3882
3883 static complex_value complex_conditional_to_firm(
3884         const conditional_expression_t *const expression)
3885 {
3886         /* first try to fold a constant condition */
3887         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3888                 bool val = fold_constant_to_bool(expression->condition);
3889                 if (val) {
3890                         expression_t *true_expression = expression->true_expression;
3891                         if (true_expression == NULL) {
3892                                 /* we will evaluate true_expression a second time here, but in
3893                                  * this case it is harmless since constant expression have no
3894                                  * side effects */
3895                                 true_expression = expression->condition;
3896                         }
3897                         return expression_to_complex(true_expression);
3898                 } else {
3899                         return expression_to_complex(expression->false_expression);
3900                 }
3901         }
3902
3903         jump_target true_target;
3904         jump_target false_target;
3905         init_jump_target(&true_target,  NULL);
3906         init_jump_target(&false_target, NULL);
3907         complex_value cond_val;
3908         memset(&cond_val, 0, sizeof(cond_val));
3909         if (expression->true_expression == NULL) {
3910                 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3911                 cond_val
3912                         = create_complex_condition_evaluation(expression->condition,
3913                                                               &true_target, &false_target);
3914         } else {
3915                 expression_to_control_flow(expression->condition, &true_target, &false_target);
3916         }
3917
3918         complex_value val;
3919         memset(&val, 0, sizeof(val));
3920         jump_target   exit_target;
3921         init_jump_target(&exit_target, NULL);
3922
3923         if (enter_jump_target(&true_target)) {
3924                 if (expression->true_expression) {
3925                         val = expression_to_complex(expression->true_expression);
3926                 } else {
3927                         assert(cond_val.real != NULL);
3928                         val = cond_val;
3929                 }
3930                 jump_to_target(&exit_target);
3931         }
3932
3933         type_t *const type = skip_typeref(expression->base.type);
3934         if (enter_jump_target(&false_target)) {
3935                 complex_value false_val
3936                         = expression_to_complex(expression->false_expression);
3937                 jump_to_target(&exit_target);
3938                 if (val.real != NULL) {
3939                         ir_node  *const inr[] = { val.real, false_val.real };
3940                         ir_node  *const ini[] = { val.imag, false_val.imag };
3941                         dbg_info *const dbgi  = get_dbg_info(&expression->base.pos);
3942                         ir_mode  *const mode  = get_complex_mode_arithmetic(type);
3943                         ir_node  *const block = exit_target.block;
3944                         val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3945                         val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3946                 } else {
3947                         val = false_val;
3948                 }
3949         }
3950
3951         if (!enter_jump_target(&exit_target)) {
3952                 set_cur_block(new_Block(0, NULL));
3953                 assert(!is_type_void(type));
3954                 ir_mode *mode = get_complex_mode_arithmetic(type);
3955                 val.real = new_Unknown(mode);
3956                 val.imag = val.real;
3957         }
3958         return val;
3959 }
3960
3961 static complex_value expression_to_complex(const expression_t *expression)
3962 {
3963         switch (expression->kind) {
3964         case EXPR_REFERENCE:
3965                 return complex_reference_to_firm(&expression->reference);
3966         case EXPR_SELECT:
3967                 return complex_select_to_firm(&expression->select);
3968         case EXPR_ARRAY_ACCESS:
3969                 return complex_array_access_to_firm(&expression->array_access);
3970         case EXPR_UNARY_CAST:
3971                 return complex_cast_to_firm(&expression->unary);
3972         case EXPR_BINARY_COMMA:
3973                 evaluate_expression_discard_result(expression->binary.left);
3974                 return expression_to_complex(expression->binary.right);
3975         case EXPR_BINARY_ADD:
3976                 return create_complex_binop(&expression->binary, new_complex_add);
3977         case EXPR_BINARY_ADD_ASSIGN:
3978                 return create_complex_assign_binop(&expression->binary, new_complex_add);
3979         case EXPR_BINARY_SUB:
3980                 return create_complex_binop(&expression->binary, new_complex_sub);
3981         case EXPR_BINARY_SUB_ASSIGN:
3982                 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3983         case EXPR_BINARY_MUL:
3984                 return create_complex_binop(&expression->binary, new_complex_mul);
3985         case EXPR_BINARY_MUL_ASSIGN:
3986                 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3987         case EXPR_BINARY_DIV:
3988                 return create_complex_binop(&expression->binary, new_complex_div);
3989         case EXPR_BINARY_DIV_ASSIGN:
3990                 return create_complex_assign_binop(&expression->binary, new_complex_div);
3991         case EXPR_UNARY_PLUS:
3992                 return expression_to_complex(expression->unary.value);
3993         case EXPR_UNARY_PREFIX_INCREMENT:
3994                 return create_complex_assign_unop(&expression->unary,
3995                                                   new_complex_increment, false);
3996         case EXPR_UNARY_PREFIX_DECREMENT:
3997                 return create_complex_assign_unop(&expression->unary,
3998                                                   new_complex_decrement, false);
3999         case EXPR_UNARY_POSTFIX_INCREMENT:
4000                 return create_complex_assign_unop(&expression->unary,
4001                                                   new_complex_increment, true);
4002         case EXPR_UNARY_POSTFIX_DECREMENT:
4003                 return create_complex_assign_unop(&expression->unary,
4004                                                   new_complex_decrement, true);
4005         case EXPR_UNARY_NEGATE:
4006                 return complex_negate_to_firm(&expression->unary);
4007         case EXPR_UNARY_COMPLEMENT:
4008                 return complex_complement_to_firm(&expression->unary);
4009         case EXPR_BINARY_ASSIGN: {
4010                 const binary_expression_t *binexpr = &expression->binary;
4011                 dbg_info                  *dbgi   = get_dbg_info(&binexpr->base.pos);
4012                 complex_value value = expression_to_complex(binexpr->right);
4013                 ir_node      *addr  = expression_to_addr(binexpr->left);
4014                 set_complex_value_for_expression(dbgi, binexpr->left, value, addr);
4015                 return value;
4016         }
4017         case EXPR_LITERAL_CASES:
4018                 return complex_literal_to_firm(&expression->literal);
4019         case EXPR_CALL:
4020                 return complex_call_to_firm(&expression->call);
4021         case EXPR_CONDITIONAL:
4022                 return complex_conditional_to_firm(&expression->conditional);
4023
4024         default:
4025                 break;
4026         }
4027         panic("complex expression not implemented yet");
4028 }
4029
4030
4031
4032 static void create_variable_entity(entity_t *variable,
4033                                    declaration_kind_t declaration_kind,
4034                                    ir_type *parent_type)
4035 {
4036         assert(variable->kind == ENTITY_VARIABLE);
4037         type_t    *type = skip_typeref(variable->declaration.type);
4038
4039         ident     *const id        = new_id_from_str(variable->base.symbol->string);
4040         ir_type   *const irtype    = get_ir_type(type);
4041         dbg_info  *const dbgi      = get_dbg_info(&variable->base.pos);
4042         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
4043         unsigned         alignment = variable->declaration.alignment;
4044
4045         set_entity_alignment(irentity, alignment);
4046
4047         handle_decl_modifiers(irentity, variable);
4048
4049         variable->declaration.kind  = (unsigned char) declaration_kind;
4050         variable->variable.v.entity = irentity;
4051         set_entity_ld_ident(irentity, create_ld_ident(variable));
4052
4053         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4054                 set_entity_volatility(irentity, volatility_is_volatile);
4055         }
4056 }
4057
4058
4059 typedef struct type_path_entry_t type_path_entry_t;
4060 struct type_path_entry_t {
4061         type_t           *type;
4062         ir_initializer_t *initializer;
4063         size_t            index;
4064         entity_t         *compound_entry;
4065 };
4066
4067 typedef struct type_path_t type_path_t;
4068 struct type_path_t {
4069         type_path_entry_t *path;
4070         type_t            *top_type;
4071         bool               invalid;
4072 };
4073
4074 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
4075 {
4076         size_t len = ARR_LEN(path->path);
4077
4078         for (size_t i = 0; i < len; ++i) {
4079                 const type_path_entry_t *entry = & path->path[i];
4080
4081                 type_t *type = skip_typeref(entry->type);
4082                 if (is_type_compound(type)) {
4083                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
4084                 } else if (is_type_array(type)) {
4085                         fprintf(stderr, "[%u]", (unsigned) entry->index);
4086                 } else {
4087                         fprintf(stderr, "-INVALID-");
4088                 }
4089         }
4090         fprintf(stderr, "  (");
4091         print_type(path->top_type);
4092         fprintf(stderr, ")");
4093 }
4094
4095 static type_path_entry_t *get_type_path_top(const type_path_t *path)
4096 {
4097         size_t len = ARR_LEN(path->path);
4098         assert(len > 0);
4099         return & path->path[len-1];
4100 }
4101
4102 static type_path_entry_t *append_to_type_path(type_path_t *path)
4103 {
4104         size_t len = ARR_LEN(path->path);
4105         ARR_RESIZE(type_path_entry_t, path->path, len+1);
4106
4107         type_path_entry_t *result = & path->path[len];
4108         memset(result, 0, sizeof(result[0]));
4109         return result;
4110 }
4111
4112 static size_t get_compound_member_count(const compound_type_t *type)
4113 {
4114         compound_t *compound  = type->compound;
4115         size_t      n_members = 0;
4116         entity_t   *member    = compound->members.entities;
4117         for ( ; member != NULL; member = member->base.next) {
4118                 ++n_members;
4119         }
4120
4121         return n_members;
4122 }
4123
4124 static ir_initializer_t *get_initializer_entry(type_path_t *path)
4125 {
4126         type_t *orig_top_type = path->top_type;
4127         type_t *top_type      = skip_typeref(orig_top_type);
4128
4129         assert(is_type_compound(top_type) || is_type_array(top_type));
4130
4131         if (ARR_LEN(path->path) == 0) {
4132                 return NULL;
4133         } else {
4134                 type_path_entry_t *top         = get_type_path_top(path);
4135                 ir_initializer_t  *initializer = top->initializer;
4136                 return get_initializer_compound_value(initializer, top->index);
4137         }
4138 }
4139
4140 static void descend_into_subtype(type_path_t *path)
4141 {
4142         type_t *orig_top_type = path->top_type;
4143         type_t *top_type      = skip_typeref(orig_top_type);
4144
4145         assert(is_type_compound(top_type) || is_type_array(top_type));
4146
4147         ir_initializer_t *initializer = get_initializer_entry(path);
4148
4149         type_path_entry_t *top = append_to_type_path(path);
4150         top->type              = top_type;
4151
4152         size_t len;
4153
4154         if (is_type_compound(top_type)) {
4155                 compound_t *const compound = top_type->compound.compound;
4156                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
4157
4158                 top->compound_entry = entry;
4159                 top->index          = 0;
4160                 len                 = get_compound_member_count(&top_type->compound);
4161                 if (entry != NULL) {
4162                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4163                         path->top_type = entry->declaration.type;
4164                 }
4165         } else {
4166                 assert(is_type_array(top_type));
4167                 assert(top_type->array.size > 0);
4168
4169                 top->index     = 0;
4170                 path->top_type = top_type->array.element_type;
4171                 len            = top_type->array.size;
4172         }
4173         if (initializer == NULL
4174                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
4175                 initializer = create_initializer_compound(len);
4176                 /* we have to set the entry at the 2nd latest path entry... */
4177                 size_t path_len = ARR_LEN(path->path);
4178                 assert(path_len >= 1);
4179                 if (path_len > 1) {
4180                         type_path_entry_t *entry        = & path->path[path_len-2];
4181                         ir_initializer_t  *tinitializer = entry->initializer;
4182                         set_initializer_compound_value(tinitializer, entry->index,
4183                                                        initializer);
4184                 }
4185         }
4186         top->initializer = initializer;
4187 }
4188
4189 static void ascend_from_subtype(type_path_t *path)
4190 {
4191         type_path_entry_t *top = get_type_path_top(path);
4192
4193         path->top_type = top->type;
4194
4195         size_t len = ARR_LEN(path->path);
4196         ARR_RESIZE(type_path_entry_t, path->path, len-1);
4197 }
4198
4199 static void walk_designator(type_path_t *path, const designator_t *designator)
4200 {
4201         /* designators start at current object type */
4202         ARR_RESIZE(type_path_entry_t, path->path, 1);
4203
4204         for ( ; designator != NULL; designator = designator->next) {
4205                 type_path_entry_t *top         = get_type_path_top(path);
4206                 type_t            *orig_type   = top->type;
4207                 type_t            *type        = skip_typeref(orig_type);
4208
4209                 if (designator->symbol != NULL) {
4210                         assert(is_type_compound(type));
4211                         size_t    index  = 0;
4212                         symbol_t *symbol = designator->symbol;
4213
4214                         compound_t *compound = type->compound.compound;
4215                         entity_t   *iter     = compound->members.entities;
4216                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
4217                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
4218
4219                         /* revert previous initialisations of other union elements */
4220                         if (type->kind == TYPE_COMPOUND_UNION) {
4221                                 ir_initializer_t *initializer = top->initializer;
4222                                 if (initializer != NULL
4223                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
4224                                         /* are we writing to a new element? */
4225                                         ir_initializer_t *oldi
4226                                                 = get_initializer_compound_value(initializer, index);
4227                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
4228                                                 /* clear initializer */
4229                                                 size_t len
4230                                                         = get_initializer_compound_n_entries(initializer);
4231                                                 ir_initializer_t *nulli = get_initializer_null();
4232                                                 for (size_t i = 0; i < len; ++i) {
4233                                                         set_initializer_compound_value(initializer, i,
4234                                                                                        nulli);
4235                                                 }
4236                                         }
4237                                 }
4238                         }
4239
4240                         top->type           = orig_type;
4241                         top->compound_entry = iter;
4242                         top->index          = index;
4243                         orig_type           = iter->declaration.type;
4244                 } else {
4245                         expression_t *array_index = designator->array_index;
4246                         assert(is_type_array(type));
4247
4248                         long index = fold_constant_to_int(array_index);
4249                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
4250
4251                         top->type  = orig_type;
4252                         top->index = (size_t) index;
4253                         orig_type  = type->array.element_type;
4254                 }
4255                 path->top_type = orig_type;
4256
4257                 if (designator->next != NULL) {
4258                         descend_into_subtype(path);
4259                 }
4260         }
4261
4262         path->invalid  = false;
4263 }
4264
4265 static void advance_current_object(type_path_t *path)
4266 {
4267         if (path->invalid) {
4268                 /* TODO: handle this... */
4269                 panic("invalid initializer (excessive elements)");
4270         }
4271
4272         type_path_entry_t *top = get_type_path_top(path);
4273
4274         type_t *type = skip_typeref(top->type);
4275         if (is_type_union(type)) {
4276                 /* only the first element is initialized in unions */
4277                 top->compound_entry = NULL;
4278         } else if (is_type_struct(type)) {
4279                 entity_t *entry = top->compound_entry;
4280
4281                 top->index++;
4282                 entry               = skip_unnamed_bitfields(entry->base.next);
4283                 top->compound_entry = entry;
4284                 if (entry != NULL) {
4285                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4286                         path->top_type = entry->declaration.type;
4287                         return;
4288                 }
4289         } else {
4290                 assert(is_type_array(type));
4291
4292                 top->index++;
4293                 if (!type->array.size_constant || top->index < type->array.size) {
4294                         return;
4295                 }
4296         }
4297
4298         /* we're past the last member of the current sub-aggregate, try if we
4299          * can ascend in the type hierarchy and continue with another subobject */
4300         size_t len = ARR_LEN(path->path);
4301
4302         if (len > 1) {
4303                 ascend_from_subtype(path);
4304                 advance_current_object(path);
4305         } else {
4306                 path->invalid = true;
4307         }
4308 }
4309
4310
4311 static ir_initializer_t *create_ir_initializer_value(
4312                 const initializer_value_t *initializer)
4313 {
4314         expression_t *expr = initializer->value;
4315         type_t       *type = skip_typeref(expr->base.type);
4316
4317         if (is_type_compound(type)) {
4318                 if (expr->kind == EXPR_UNARY_CAST) {
4319                         expr = expr->unary.value;
4320                         type = skip_typeref(expr->base.type);
4321                 }
4322                 /* must be a compound literal... */
4323                 if (expr->kind == EXPR_COMPOUND_LITERAL) {
4324                         return create_ir_initializer(expr->compound_literal.initializer,
4325                                                      type);
4326                 }
4327         } else if (is_type_complex(type)) {
4328                 complex_value     const value     = expression_to_complex(expr);
4329                 ir_mode          *const mode      = get_complex_mode_storage(type);
4330                 ir_node          *const real      = create_conv(NULL, value.real, mode);
4331                 ir_node          *const imag      = create_conv(NULL, value.imag, mode);
4332                 ir_initializer_t *const res       = create_initializer_compound(2);
4333                 ir_initializer_t *const init_real = create_initializer_const(real);
4334                 ir_initializer_t *const init_imag = create_initializer_const(imag);
4335                 set_initializer_compound_value(res, 0, init_real);
4336                 set_initializer_compound_value(res, 1, init_imag);
4337                 return res;
4338         }
4339
4340         ir_node *value = expression_to_value(expr);
4341         value = conv_to_storage_type(NULL, value, type);
4342         return create_initializer_const(value);
4343 }
4344
4345 /** Tests whether type can be initialized by a string constant */
4346 static bool is_string_type(type_t *type)
4347 {
4348         if (!is_type_array(type))
4349                 return false;
4350
4351         type_t *const inner = skip_typeref(type->array.element_type);
4352         return is_type_integer(inner);
4353 }
4354
4355 static ir_initializer_t *create_ir_initializer_list(
4356                 const initializer_list_t *initializer, type_t *type)
4357 {
4358         type_path_t path;
4359         memset(&path, 0, sizeof(path));
4360         path.top_type = type;
4361         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4362
4363         descend_into_subtype(&path);
4364
4365         for (size_t i = 0; i < initializer->len; ++i) {
4366                 const initializer_t *sub_initializer = initializer->initializers[i];
4367
4368                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4369                         walk_designator(&path, sub_initializer->designator.designator);
4370                         continue;
4371                 }
4372
4373                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4374                         const expression_t *expr      = sub_initializer->value.value;
4375                         const type_t       *expr_type = skip_typeref(expr->base.type);
4376                         /* we might have to descend into types until the types match */
4377                         while (true) {
4378                                 type_t *orig_top_type = path.top_type;
4379                                 type_t *top_type      = skip_typeref(orig_top_type);
4380
4381                                 if (types_compatible(top_type, expr_type))
4382                                         break;
4383                                 descend_into_subtype(&path);
4384                         }
4385                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
4386                         /* we might have to descend into types until we're at a scalar
4387                          * type */
4388                         while (true) {
4389                                 type_t *orig_top_type = path.top_type;
4390                                 type_t *top_type      = skip_typeref(orig_top_type);
4391
4392                                 if (is_string_type(top_type))
4393                                         break;
4394                                 descend_into_subtype(&path);
4395                         }
4396                 }
4397
4398                 ir_initializer_t *sub_irinitializer
4399                         = create_ir_initializer(sub_initializer, path.top_type);
4400
4401                 size_t path_len = ARR_LEN(path.path);
4402                 assert(path_len >= 1);
4403                 type_path_entry_t *entry        = & path.path[path_len-1];
4404                 ir_initializer_t  *tinitializer = entry->initializer;
4405                 set_initializer_compound_value(tinitializer, entry->index,
4406                                                sub_irinitializer);
4407
4408                 advance_current_object(&path);
4409         }
4410
4411         assert(ARR_LEN(path.path) >= 1);
4412         ir_initializer_t *result = path.path[0].initializer;
4413         DEL_ARR_F(path.path);
4414
4415         return result;
4416 }
4417
4418 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
4419 {
4420         type = skip_typeref(type);
4421
4422         assert(type->kind == TYPE_ARRAY);
4423         assert(type->array.size_constant);
4424         string_literal_expression_t const *const str = get_init_string(init);
4425         size_t            const str_len = str->value.size;
4426         size_t            const arr_len = type->array.size;
4427         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
4428         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
4429         char const       *      p       = str->value.begin;
4430         switch (str->value.encoding) {
4431         case STRING_ENCODING_CHAR:
4432         case STRING_ENCODING_UTF8:
4433                 for (size_t i = 0; i != arr_len; ++i) {
4434                         char              const c      = i < str_len ? *p++ : 0;
4435                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
4436                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4437                         set_initializer_compound_value(irinit, i, tvinit);
4438                 }
4439                 break;
4440
4441         case STRING_ENCODING_CHAR16:
4442         case STRING_ENCODING_CHAR32:
4443         case STRING_ENCODING_WIDE:
4444                 for (size_t i = 0; i != arr_len; ++i) {
4445                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
4446                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
4447                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4448                         set_initializer_compound_value(irinit, i, tvinit);
4449                 }
4450                 break;
4451         }
4452
4453         return irinit;
4454 }
4455
4456 static ir_initializer_t *create_ir_initializer(
4457                 const initializer_t *initializer, type_t *type)
4458 {
4459         switch (initializer->kind) {
4460                 case INITIALIZER_STRING:
4461                         return create_ir_initializer_string(initializer, type);
4462
4463                 case INITIALIZER_LIST:
4464                         return create_ir_initializer_list(&initializer->list, type);
4465
4466                 case INITIALIZER_VALUE:
4467                         return create_ir_initializer_value(&initializer->value);
4468
4469                 case INITIALIZER_DESIGNATOR:
4470                         panic("unexpected designator initializer");
4471         }
4472         panic("unknown initializer");
4473 }
4474
4475 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4476  *  are elements [...] the remainder of the aggregate shall be initialized
4477  *  implicitly the same as objects that have static storage duration. */
4478 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4479                 ir_node *base_addr)
4480 {
4481         /* for unions we must NOT do anything for null initializers */
4482         ir_type *owner = get_entity_owner(entity);
4483         if (is_Union_type(owner)) {
4484                 return;
4485         }
4486
4487         ir_type *ent_type = get_entity_type(entity);
4488         /* create sub-initializers for a compound type */
4489         if (is_compound_type(ent_type)) {
4490                 unsigned n_members = get_compound_n_members(ent_type);
4491                 for (unsigned n = 0; n < n_members; ++n) {
4492                         ir_entity *member = get_compound_member(ent_type, n);
4493                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4494                                                                 member);
4495                         create_dynamic_null_initializer(member, dbgi, addr);
4496                 }
4497                 return;
4498         }
4499         if (is_Array_type(ent_type)) {
4500                 assert(has_array_upper_bound(ent_type, 0));
4501                 long n = get_array_upper_bound_int(ent_type, 0);
4502                 for (long i = 0; i < n; ++i) {
4503                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4504                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4505                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4506                         ir_node   *in[1]    = { cnst };
4507                         ir_entity *arrent   = get_array_element_entity(ent_type);
4508                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4509                                                         arrent);
4510                         create_dynamic_null_initializer(arrent, dbgi, addr);
4511                 }
4512                 return;
4513         }
4514
4515         ir_mode *value_mode = get_type_mode(ent_type);
4516         ir_node *node       = new_Const(get_mode_null(value_mode));
4517
4518         /* is it a bitfield type? */
4519         if (is_Primitive_type(ent_type) &&
4520                         get_primitive_base_type(ent_type) != NULL) {
4521                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4522                 return;
4523         }
4524
4525         ir_node *mem    = get_store();
4526         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4527         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4528         set_store(proj_m);
4529 }
4530
4531 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4532                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4533 {
4534         switch (get_initializer_kind(initializer)) {
4535         case IR_INITIALIZER_NULL:
4536                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4537                 return;
4538         case IR_INITIALIZER_CONST: {
4539                 ir_node *node     = get_initializer_const_value(initializer);
4540                 ir_type *ent_type = get_entity_type(entity);
4541
4542                 /* is it a bitfield type? */
4543                 if (is_Primitive_type(ent_type) &&
4544                                 get_primitive_base_type(ent_type) != NULL) {
4545                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4546                         return;
4547                 }
4548
4549                 ir_node *mem = get_store();
4550                 ir_node *new_mem;
4551                 if (is_compound_type(ent_type)) {
4552                         ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
4553                         new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4554                 } else {
4555                         assert(get_type_mode(type) == get_irn_mode(node));
4556                         ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4557                         new_mem = new_Proj(store, mode_M, pn_Store_M);
4558                 }
4559                 set_store(new_mem);
4560                 return;
4561         }
4562         case IR_INITIALIZER_TARVAL: {
4563                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4564                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4565                 ir_type   *ent_type = get_entity_type(entity);
4566
4567                 /* is it a bitfield type? */
4568                 if (is_Primitive_type(ent_type) &&
4569                                 get_primitive_base_type(ent_type) != NULL) {
4570                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4571                         return;
4572                 }
4573
4574                 assert(get_type_mode(type) == get_tarval_mode(tv));
4575                 ir_node *mem    = get_store();
4576                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4577                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4578                 set_store(proj_m);
4579                 return;
4580         }
4581         case IR_INITIALIZER_COMPOUND: {
4582                 assert(is_compound_type(type) || is_Array_type(type));
4583                 int n_members;
4584                 if (is_Array_type(type)) {
4585                         assert(has_array_upper_bound(type, 0));
4586                         n_members = get_array_upper_bound_int(type, 0);
4587                 } else {
4588                         n_members = get_compound_n_members(type);
4589                 }
4590
4591                 if (get_initializer_compound_n_entries(initializer)
4592                                 != (unsigned) n_members)
4593                         panic("initializer doesn't match compound type");
4594
4595                 for (int i = 0; i < n_members; ++i) {
4596                         ir_node   *addr;
4597                         ir_type   *irtype;
4598                         ir_entity *sub_entity;
4599                         if (is_Array_type(type)) {
4600                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4601                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4602                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4603                                 ir_node   *in[1]    = { cnst };
4604                                 irtype     = get_array_element_type(type);
4605                                 sub_entity = get_array_element_entity(type);
4606                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4607                                                        sub_entity);
4608                         } else {
4609                                 sub_entity = get_compound_member(type, i);
4610                                 irtype     = get_entity_type(sub_entity);
4611                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4612                                                              sub_entity);
4613                         }
4614
4615                         ir_initializer_t *sub_init
4616                                 = get_initializer_compound_value(initializer, i);
4617
4618                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4619                                                        addr);
4620                 }
4621                 return;
4622         }
4623         }
4624
4625         panic("invalid ir_initializer");
4626 }
4627
4628 static void create_dynamic_initializer(ir_initializer_t *initializer,
4629                 dbg_info *dbgi, ir_entity *entity)
4630 {
4631         ir_node *frame     = get_irg_frame(current_ir_graph);
4632         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4633         ir_type *type      = get_entity_type(entity);
4634
4635         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4636 }
4637
4638 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4639                                      ir_entity *entity, type_t *type)
4640 {
4641         ir_node *memory = get_store();
4642         ir_node *nomem  = new_NoMem();
4643         ir_node *frame  = get_irg_frame(current_ir_graph);
4644         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4645
4646         if (initializer->kind == INITIALIZER_VALUE) {
4647                 initializer_value_t *initializer_value = &initializer->value;
4648
4649                 ir_node *value = expression_to_value(initializer_value->value);
4650                 type = skip_typeref(type);
4651                 assign_value(dbgi, addr, type, value);
4652                 return;
4653         }
4654
4655         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4656                 ir_initializer_t *irinitializer
4657                         = create_ir_initializer(initializer, type);
4658
4659                 create_dynamic_initializer(irinitializer, dbgi, entity);
4660                 return;
4661         }
4662
4663         /* create a "template" entity which is copied to the entity on the stack */
4664         ir_entity *const init_entity
4665                 = create_initializer_entity(dbgi, initializer, type);
4666         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4667         ir_type *const irtype   = get_ir_type(type);
4668         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4669
4670         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4671         set_store(copyb_mem);
4672 }
4673
4674 static void create_initializer_local_variable_entity(entity_t *entity)
4675 {
4676         assert(entity->kind == ENTITY_VARIABLE);
4677         initializer_t *initializer = entity->variable.initializer;
4678         dbg_info      *dbgi        = get_dbg_info(&entity->base.pos);
4679         ir_entity     *irentity    = entity->variable.v.entity;
4680         type_t        *type        = entity->declaration.type;
4681
4682         create_local_initializer(initializer, dbgi, irentity, type);
4683 }
4684
4685 static void create_variable_initializer(entity_t *entity)
4686 {
4687         assert(entity->kind == ENTITY_VARIABLE);
4688         initializer_t *initializer = entity->variable.initializer;
4689         if (initializer == NULL)
4690                 return;
4691
4692         declaration_kind_t declaration_kind
4693                 = (declaration_kind_t) entity->declaration.kind;
4694         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4695                 create_initializer_local_variable_entity(entity);
4696                 return;
4697         }
4698
4699         type_t            *type = entity->declaration.type;
4700         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4701
4702         if (initializer->kind == INITIALIZER_VALUE) {
4703                 expression_t *      value     = initializer->value.value;
4704                 type_t       *const init_type = skip_typeref(value->base.type);
4705
4706                 if (is_type_complex(init_type)) {
4707                         complex_value nodes = expression_to_complex(value);
4708                         dbg_info     *dbgi  = get_dbg_info(&entity->base.pos);
4709                         ir_mode      *mode  = get_complex_mode_storage(init_type);
4710                         ir_node      *real  = create_conv(dbgi, nodes.real, mode);
4711                         ir_node      *imag  = create_conv(dbgi, nodes.imag, mode);
4712                         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4713                                 set_value(entity->variable.v.value_number, real);
4714                                 set_value(entity->variable.v.value_number+1, imag);
4715                         } else {
4716                                 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4717                                 ir_entity *irentity = entity->variable.v.entity;
4718                                 if (tq & TYPE_QUALIFIER_CONST
4719                                                 && get_entity_owner(irentity) != get_tls_type()) {
4720                                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4721                                 }
4722                                 ir_initializer_t *initializer = create_initializer_compound(2);
4723                                 ir_initializer_t *reali = create_initializer_const(real);
4724                                 set_initializer_compound_value(initializer, 0, reali);
4725                                 ir_initializer_t *imagi = create_initializer_const(imag);
4726                                 set_initializer_compound_value(initializer, 1, imagi);
4727                                 set_entity_initializer(irentity, initializer);
4728                         }
4729                         return;
4730                 } else if (!is_type_scalar(init_type)) {
4731                         if (value->kind != EXPR_COMPOUND_LITERAL)
4732                                 panic("expected non-scalar initializer to be a compound literal");
4733                         initializer = value->compound_literal.initializer;
4734                         goto have_initializer;
4735                 }
4736
4737                 ir_node  *      node = expression_to_value(value);
4738                 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4739                 node = conv_to_storage_type(dbgi, node, init_type);
4740
4741                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4742                         set_value(entity->variable.v.value_number, node);
4743                 } else {
4744                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4745
4746                         ir_entity *irentity = entity->variable.v.entity;
4747
4748                         if (tq & TYPE_QUALIFIER_CONST
4749                                         && get_entity_owner(irentity) != get_tls_type()) {
4750                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4751                         }
4752                         set_atomic_ent_value(irentity, node);
4753                 }
4754         } else {
4755 have_initializer:
4756                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4757                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4758
4759                 ir_entity        *irentity        = entity->variable.v.entity;
4760                 ir_initializer_t *irinitializer
4761                         = create_ir_initializer(initializer, type);
4762
4763                 if (tq & TYPE_QUALIFIER_CONST) {
4764                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4765                 }
4766                 set_entity_initializer(irentity, irinitializer);
4767         }
4768 }
4769
4770 static void create_variable_length_array(entity_t *entity)
4771 {
4772         assert(entity->kind == ENTITY_VARIABLE);
4773         assert(entity->variable.initializer == NULL);
4774
4775         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4776         entity->variable.v.vla_base = NULL;
4777
4778         /* TODO: record VLA somewhere so we create the free node when we leave
4779          * it's scope */
4780 }
4781
4782 static void allocate_variable_length_array(entity_t *entity)
4783 {
4784         assert(entity->kind == ENTITY_VARIABLE);
4785         assert(entity->variable.initializer == NULL);
4786         assert(currently_reachable());
4787
4788         dbg_info *dbgi      = get_dbg_info(&entity->base.pos);
4789         type_t   *type      = entity->declaration.type;
4790         ir_type  *el_type   = get_ir_type(type->array.element_type);
4791
4792         /* make sure size_node is calculated */
4793         get_type_size_node(type);
4794         ir_node  *elems = type->array.size_node;
4795         ir_node  *mem   = get_store();
4796         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4797
4798         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4799         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4800         set_store(proj_m);
4801
4802         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4803         entity->variable.v.vla_base = addr;
4804 }
4805
4806 static bool var_needs_entity(variable_t const *const var)
4807 {
4808         if (var->address_taken)
4809                 return true;
4810         type_t *const type = skip_typeref(var->base.type);
4811         return (!is_type_scalar(type) && !is_type_complex(type))
4812              || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4813 }
4814
4815 /**
4816  * Creates a Firm local variable from a declaration.
4817  */
4818 static void create_local_variable(entity_t *entity)
4819 {
4820         assert(entity->kind == ENTITY_VARIABLE);
4821         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4822
4823         if (!var_needs_entity(&entity->variable)) {
4824                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4825                 entity->variable.v.value_number = next_value_number_function;
4826                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4827                 ++next_value_number_function;
4828                 if (is_type_complex(skip_typeref(entity->declaration.type)))
4829                         ++next_value_number_function;
4830                 return;
4831         }
4832
4833         /* is it a variable length array? */
4834         type_t *const type = skip_typeref(entity->declaration.type);
4835         if (is_type_array(type) && !type->array.size_constant) {
4836                 create_variable_length_array(entity);
4837                 return;
4838         }
4839
4840         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4841         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4842 }
4843
4844 static void create_local_static_variable(entity_t *entity)
4845 {
4846         assert(entity->kind == ENTITY_VARIABLE);
4847         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4848
4849         type_t   *type           = skip_typeref(entity->declaration.type);
4850         ir_type  *const var_type = entity->variable.thread_local ?
4851                 get_tls_type() : get_glob_type();
4852         ir_type  *const irtype   = get_ir_type(type);
4853         dbg_info *const dbgi     = get_dbg_info(&entity->base.pos);
4854
4855         size_t l = strlen(entity->base.symbol->string);
4856         char   buf[l + sizeof(".%u")];
4857         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4858         ident     *const id       = id_unique(buf);
4859         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4860
4861         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4862                 set_entity_volatility(irentity, volatility_is_volatile);
4863         }
4864
4865         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4866         entity->variable.v.entity = irentity;
4867
4868         set_entity_ld_ident(irentity, id);
4869         set_entity_visibility(irentity, ir_visibility_local);
4870
4871         if (entity->variable.initializer == NULL) {
4872                 ir_initializer_t *null_init = get_initializer_null();
4873                 set_entity_initializer(irentity, null_init);
4874         }
4875
4876         PUSH_IRG(get_const_code_irg());
4877         create_variable_initializer(entity);
4878         POP_IRG();
4879 }
4880
4881 static ir_node *return_statement_to_firm(return_statement_t *statement)
4882 {
4883         if (!currently_reachable())
4884                 return NULL;
4885
4886         dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4887         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4888
4889         ir_node *in[1];
4890         int in_len;
4891         if (is_type_void(type)) {
4892                 /* just create the side effects, don't return anything */
4893                 if (statement->value)
4894                         evaluate_expression_discard_result(statement->value);
4895                 in[0]  = NULL;
4896                 in_len = 0;
4897         } else if (is_type_complex(type)) {
4898                 if (statement->value) {
4899                         complex_value value = expression_to_complex(statement->value);
4900                         in[0] = complex_to_memory(dbgi, type, value);
4901                 } else {
4902                         in[0] = new_Unknown(mode_P_data);
4903                 }
4904                 in_len = 1;
4905         } else {
4906                 ir_mode *const mode = get_ir_mode_storage(type);
4907                 if (statement->value) {
4908                         ir_node *value = expression_to_value(statement->value);
4909                         value = conv_to_storage_type(dbgi, value, type);
4910                         in[0] = create_conv(dbgi, value, mode);
4911                 } else {
4912                         in[0] = new_Unknown(mode);
4913                 }
4914                 in_len = 1;
4915         }
4916
4917         ir_node *const store = get_store();
4918         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4919
4920         ir_node *end_block = get_irg_end_block(current_ir_graph);
4921         add_immBlock_pred(end_block, ret);
4922
4923         set_unreachable_now();
4924         return NULL;
4925 }
4926
4927 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4928 {
4929         if (!currently_reachable())
4930                 return NULL;
4931
4932         expression_t *expression = statement->expression;
4933         type_t       *type       = skip_typeref(expression->base.type);
4934         if (is_type_complex(type)) {
4935                 expression_to_complex(expression);
4936                 return NULL; /* TODO */
4937         } else {
4938                 return expression_to_value(statement->expression);
4939         }
4940 }
4941
4942 static void create_local_declarations(entity_t*);
4943
4944 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4945 {
4946         create_local_declarations(compound->scope.entities);
4947
4948         ir_node     *result    = NULL;
4949         statement_t *statement = compound->statements;
4950         for ( ; statement != NULL; statement = statement->base.next) {
4951                 result = statement_to_firm(statement);
4952         }
4953
4954         return result;
4955 }
4956
4957 static void create_global_variable(entity_t *entity)
4958 {
4959         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4960         ir_visibility       visibility = ir_visibility_external;
4961         storage_class_tag_t storage
4962                 = (storage_class_tag_t)entity->declaration.storage_class;
4963         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4964         assert(entity->kind == ENTITY_VARIABLE);
4965
4966         switch (storage) {
4967         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4968         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4969         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4970         case STORAGE_CLASS_TYPEDEF:
4971         case STORAGE_CLASS_AUTO:
4972         case STORAGE_CLASS_REGISTER:
4973                 panic("invalid storage class for global var");
4974         }
4975
4976         /* "common" symbols */
4977         if (storage == STORAGE_CLASS_NONE
4978             && entity->variable.initializer == NULL
4979             && !entity->variable.thread_local
4980             && (modifiers & DM_WEAK) == 0) {
4981                 linkage |= IR_LINKAGE_MERGE;
4982         }
4983
4984         ir_type *var_type = get_glob_type();
4985         if (entity->variable.thread_local) {
4986                 var_type = get_tls_type();
4987         }
4988         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4989         ir_entity *irentity = entity->variable.v.entity;
4990         add_entity_linkage(irentity, linkage);
4991         set_entity_visibility(irentity, visibility);
4992         if (entity->variable.initializer == NULL
4993             && storage != STORAGE_CLASS_EXTERN) {
4994                 ir_initializer_t *null_init = get_initializer_null();
4995                 set_entity_initializer(irentity, null_init);
4996         }
4997 }
4998
4999 static void create_local_declaration(entity_t *entity)
5000 {
5001         assert(is_declaration(entity));
5002
5003         /* construct type */
5004         (void) get_ir_type(entity->declaration.type);
5005         if (entity->base.symbol == NULL) {
5006                 return;
5007         }
5008
5009         switch ((storage_class_tag_t) entity->declaration.storage_class) {
5010         case STORAGE_CLASS_STATIC:
5011                 if (entity->kind == ENTITY_FUNCTION) {
5012                         (void)get_function_entity(entity, NULL);
5013                 } else {
5014                         create_local_static_variable(entity);
5015                 }
5016                 return;
5017         case STORAGE_CLASS_EXTERN:
5018                 if (entity->kind == ENTITY_FUNCTION) {
5019                         assert(entity->function.body == NULL);
5020                         (void)get_function_entity(entity, NULL);
5021                 } else {
5022                         create_global_variable(entity);
5023                         create_variable_initializer(entity);
5024                 }
5025                 return;
5026         case STORAGE_CLASS_NONE:
5027         case STORAGE_CLASS_AUTO:
5028         case STORAGE_CLASS_REGISTER:
5029                 if (entity->kind == ENTITY_FUNCTION) {
5030                         if (entity->function.body != NULL) {
5031                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
5032                                 (void)get_function_entity(entity, owner);
5033                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5034                                 enqueue_inner_function(entity);
5035                         } else {
5036                                 (void)get_function_entity(entity, NULL);
5037                         }
5038                 } else {
5039                         create_local_variable(entity);
5040                 }
5041                 return;
5042         case STORAGE_CLASS_TYPEDEF:
5043                 break;
5044         }
5045         panic("invalid storage class");
5046 }
5047
5048 static void create_local_declarations(entity_t *e)
5049 {
5050         for (; e; e = e->base.next) {
5051                 if (is_declaration(e))
5052                         create_local_declaration(e);
5053         }
5054 }
5055
5056 static void initialize_local_declaration(entity_t *entity)
5057 {
5058         if (entity->base.symbol == NULL)
5059                 return;
5060
5061         // no need to emit code in dead blocks
5062         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5063                         && !currently_reachable())
5064                 return;
5065
5066         switch ((declaration_kind_t) entity->declaration.kind) {
5067         case DECLARATION_KIND_LOCAL_VARIABLE:
5068         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5069                 create_variable_initializer(entity);
5070                 return;
5071
5072         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5073                 allocate_variable_length_array(entity);
5074                 return;
5075
5076         case DECLARATION_KIND_COMPOUND_MEMBER:
5077         case DECLARATION_KIND_GLOBAL_VARIABLE:
5078         case DECLARATION_KIND_FUNCTION:
5079         case DECLARATION_KIND_INNER_FUNCTION:
5080                 return;
5081
5082         case DECLARATION_KIND_PARAMETER:
5083         case DECLARATION_KIND_PARAMETER_ENTITY:
5084                 panic("can't initialize parameters");
5085
5086         case DECLARATION_KIND_UNKNOWN:
5087                 panic("can't initialize unknown declaration");
5088         }
5089         panic("invalid declaration kind");
5090 }
5091
5092 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5093 {
5094         entity_t *entity = statement->declarations_begin;
5095         if (entity == NULL)
5096                 return NULL;
5097
5098         entity_t *const last = statement->declarations_end;
5099         for ( ;; entity = entity->base.next) {
5100                 if (is_declaration(entity)) {
5101                         initialize_local_declaration(entity);
5102                 } else if (entity->kind == ENTITY_TYPEDEF) {
5103                         /* §6.7.7:3  Any array size expressions associated with variable length
5104                          * array declarators are evaluated each time the declaration of the
5105                          * typedef name is reached in the order of execution. */
5106                         type_t *const type = skip_typeref(entity->typedefe.type);
5107                         if (is_type_array(type) && type->array.is_vla)
5108                                 get_vla_size(&type->array);
5109                 }
5110                 if (entity == last)
5111                         break;
5112         }
5113
5114         return NULL;
5115 }
5116
5117 static ir_node *if_statement_to_firm(if_statement_t *statement)
5118 {
5119         create_local_declarations(statement->scope.entities);
5120
5121         /* Create the condition. */
5122         jump_target true_target;
5123         jump_target false_target;
5124         init_jump_target(&true_target,  NULL);
5125         init_jump_target(&false_target, NULL);
5126         if (currently_reachable())
5127                 expression_to_control_flow(statement->condition, &true_target, &false_target);
5128
5129         jump_target exit_target;
5130         init_jump_target(&exit_target, NULL);
5131
5132         /* Create the true statement. */
5133         enter_jump_target(&true_target);
5134         statement_to_firm(statement->true_statement);
5135         jump_to_target(&exit_target);
5136
5137         /* Create the false statement. */
5138         enter_jump_target(&false_target);
5139         if (statement->false_statement)
5140                 statement_to_firm(statement->false_statement);
5141         jump_to_target(&exit_target);
5142
5143         enter_jump_target(&exit_target);
5144         return NULL;
5145 }
5146
5147 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5148 {
5149         create_local_declarations(statement->scope.entities);
5150
5151         PUSH_BREAK(NULL);
5152         PUSH_CONTINUE(NULL);
5153
5154         expression_t *const cond = statement->condition;
5155         /* Avoid an explicit body block in case of do ... while (0);. */
5156         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
5157                 /* do ... while (0);. */
5158                 statement_to_firm(statement->body);
5159                 jump_to_target(&continue_target);
5160                 enter_jump_target(&continue_target);
5161                 jump_to_target(&break_target);
5162         } else {
5163                 jump_target body_target;
5164                 init_jump_target(&body_target, NULL);
5165                 jump_to_target(&body_target);
5166                 enter_immature_jump_target(&body_target);
5167                 keep_loop();
5168                 statement_to_firm(statement->body);
5169                 jump_to_target(&continue_target);
5170                 if (enter_jump_target(&continue_target))
5171                         expression_to_control_flow(statement->condition, &body_target, &break_target);
5172                 enter_jump_target(&body_target);
5173         }
5174         enter_jump_target(&break_target);
5175
5176         POP_CONTINUE();
5177         POP_BREAK();
5178         return NULL;
5179 }
5180
5181 static ir_node *for_statement_to_firm(for_statement_t *statement)
5182 {
5183         create_local_declarations(statement->scope.entities);
5184
5185         if (currently_reachable()) {
5186                 entity_t *entity = statement->scope.entities;
5187                 for ( ; entity != NULL; entity = entity->base.next) {
5188                         if (!is_declaration(entity))
5189                                 continue;
5190
5191                         initialize_local_declaration(entity);
5192                 }
5193
5194                 if (statement->initialisation != NULL) {
5195                         expression_to_value(statement->initialisation);
5196                 }
5197         }
5198
5199         /* Create the header block */
5200         jump_target header_target;
5201         init_jump_target(&header_target, NULL);
5202         jump_to_target(&header_target);
5203         enter_immature_jump_target(&header_target);
5204         keep_loop();
5205
5206         expression_t *const step = statement->step;
5207         PUSH_BREAK(NULL);
5208         PUSH_CONTINUE(step ? NULL : header_target.block);
5209
5210         /* Create the condition. */
5211         expression_t *const cond = statement->condition;
5212         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
5213                 jump_target body_target;
5214                 init_jump_target(&body_target, NULL);
5215                 expression_to_control_flow(cond, &body_target, &break_target);
5216                 enter_jump_target(&body_target);
5217         }
5218
5219         /* Create the loop body. */
5220         statement_to_firm(statement->body);
5221         jump_to_target(&continue_target);
5222
5223         /* Create the step code. */
5224         if (step && enter_jump_target(&continue_target)) {
5225                 expression_to_value(step);
5226                 jump_to_target(&header_target);
5227         }
5228
5229         enter_jump_target(&header_target);
5230         enter_jump_target(&break_target);
5231
5232         POP_CONTINUE();
5233         POP_BREAK();
5234         return NULL;
5235 }
5236
5237 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5238 {
5239         /* determine number of cases */
5240         size_t n_cases = 0;
5241         for (case_label_statement_t *l = statement->first_case; l != NULL;
5242              l = l->next) {
5243                 /* default case */
5244                 if (l->expression == NULL)
5245                         continue;
5246                 if (l->is_empty_range)
5247                         continue;
5248                 ++n_cases;
5249         }
5250
5251         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5252         size_t           i   = 0;
5253         for (case_label_statement_t *l = statement->first_case; l != NULL;
5254              l = l->next) {
5255             if (l->expression == NULL) {
5256                         l->pn = pn_Switch_default;
5257                         continue;
5258                 }
5259                 if (l->is_empty_range)
5260                         continue;
5261                 ir_tarval *min = l->first_case;
5262                 ir_tarval *max = l->last_case;
5263                 long       pn  = (long) i+1;
5264                 ir_switch_table_set(res, i++, min, max, pn);
5265                 l->pn = pn;
5266         }
5267         return res;
5268 }
5269
5270 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5271 {
5272         dbg_info *dbgi        = get_dbg_info(&statement->base.pos);
5273         ir_node  *switch_node = NULL;
5274
5275         if (currently_reachable()) {
5276                 ir_node *expression = expression_to_value(statement->expression);
5277                 ir_switch_table *table = create_switch_table(statement);
5278                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5279
5280                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5281         }
5282
5283         set_unreachable_now();
5284
5285         PUSH_BREAK(NULL);
5286         ir_node *const old_switch            = current_switch;
5287         const bool     old_saw_default_label = saw_default_label;
5288         saw_default_label                    = false;
5289         current_switch                       = switch_node;
5290
5291         statement_to_firm(statement->body);
5292         jump_to_target(&break_target);
5293
5294         if (!saw_default_label && switch_node) {
5295                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5296                 add_pred_to_jump_target(&break_target, proj);
5297         }
5298
5299         enter_jump_target(&break_target);
5300
5301         assert(current_switch == switch_node);
5302         current_switch    = old_switch;
5303         saw_default_label = old_saw_default_label;
5304         POP_BREAK();
5305         return NULL;
5306 }
5307
5308 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5309 {
5310         if (current_switch != NULL && !statement->is_empty_range) {
5311                 jump_target case_target;
5312                 init_jump_target(&case_target, NULL);
5313
5314                 /* Fallthrough from previous case */
5315                 jump_to_target(&case_target);
5316
5317                 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5318                 add_pred_to_jump_target(&case_target, proj);
5319                 if (statement->expression == NULL)
5320                         saw_default_label = true;
5321
5322                 enter_jump_target(&case_target);
5323         }
5324
5325         return statement_to_firm(statement->statement);
5326 }
5327
5328 static ir_node *label_to_firm(const label_statement_t *statement)
5329 {
5330         label_t *const label = statement->label;
5331         prepare_label_target(label);
5332         jump_to_target(&label->target);
5333         if (--label->n_users == 0) {
5334                 enter_jump_target(&label->target);
5335         } else {
5336                 enter_immature_jump_target(&label->target);
5337                 keep_loop();
5338         }
5339
5340         return statement_to_firm(statement->statement);
5341 }
5342
5343 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5344 {
5345         label_t *const label = stmt->label;
5346         prepare_label_target(label);
5347         jump_to_target(&label->target);
5348         if (--label->n_users == 0)
5349                 enter_jump_target(&label->target);
5350         set_unreachable_now();
5351         return NULL;
5352 }
5353
5354 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5355 {
5356         if (currently_reachable()) {
5357                 ir_node *const op = expression_to_value(statement->expression);
5358                 ARR_APP1(ir_node*, ijmp_ops, op);
5359                 jump_to_target(&ijmp_target);
5360                 set_unreachable_now();
5361         }
5362         return NULL;
5363 }
5364
5365 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5366 {
5367         bool           needs_memory = statement->is_volatile;
5368         size_t         n_clobbers   = 0;
5369         asm_clobber_t *clobber      = statement->clobbers;
5370         for ( ; clobber != NULL; clobber = clobber->next) {
5371                 const char *clobber_str = clobber->clobber.begin;
5372
5373                 if (!be_is_valid_clobber(clobber_str)) {
5374                         errorf(&statement->base.pos,
5375                                    "invalid clobber '%s' specified", clobber->clobber);
5376                         continue;
5377                 }
5378
5379                 if (streq(clobber_str, "memory")) {
5380                         needs_memory = true;
5381                         continue;
5382                 }
5383
5384                 ident *id = new_id_from_str(clobber_str);
5385                 obstack_ptr_grow(&asm_obst, id);
5386                 ++n_clobbers;
5387         }
5388         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5389         ident **clobbers = NULL;
5390         if (n_clobbers > 0) {
5391                 clobbers = obstack_finish(&asm_obst);
5392         }
5393
5394         size_t n_inputs  = 0;
5395         asm_argument_t *argument = statement->inputs;
5396         for ( ; argument != NULL; argument = argument->next)
5397                 n_inputs++;
5398         size_t n_outputs = 0;
5399         argument = statement->outputs;
5400         for ( ; argument != NULL; argument = argument->next)
5401                 n_outputs++;
5402
5403         unsigned next_pos = 0;
5404
5405         ir_node *ins[n_inputs + n_outputs + 1];
5406         size_t   in_size = 0;
5407
5408         ir_asm_constraint tmp_in_constraints[n_outputs];
5409
5410         const expression_t *out_exprs[n_outputs];
5411         ir_node            *out_addrs[n_outputs];
5412         size_t              out_size = 0;
5413
5414         argument = statement->outputs;
5415         for ( ; argument != NULL; argument = argument->next) {
5416                 const char *constraints = argument->constraints.begin;
5417                 asm_constraint_flags_t asm_flags
5418                         = be_parse_asm_constraints(constraints);
5419
5420                 {
5421                         position_t const *const pos = &statement->base.pos;
5422                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5423                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5424                         }
5425                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5426                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5427                                 continue;
5428                         }
5429                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5430                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5431                                 continue;
5432                         }
5433                 }
5434
5435                 unsigned pos = next_pos++;
5436                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5437                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5438                         expression_t *expr = argument->expression;
5439                         ir_node      *addr = expression_to_addr(expr);
5440                         /* in+output, construct an artifical same_as constraint on the
5441                          * input */
5442                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5443                                 char     buf[64];
5444                                 ir_node *value = get_value_from_lvalue(expr, addr);
5445
5446                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5447
5448                                 ir_asm_constraint constraint;
5449                                 constraint.pos              = pos;
5450                                 constraint.constraint       = new_id_from_str(buf);
5451                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5452                                 tmp_in_constraints[in_size] = constraint;
5453                                 ins[in_size] = value;
5454
5455                                 ++in_size;
5456                         }
5457
5458                         out_exprs[out_size] = expr;
5459                         out_addrs[out_size] = addr;
5460                         ++out_size;
5461                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5462                         /* pure memory ops need no input (but we have to make sure we
5463                          * attach to the memory) */
5464                         assert(! (asm_flags &
5465                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5466                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5467                         needs_memory = true;
5468
5469                         /* we need to attach the address to the inputs */
5470                         expression_t *expr = argument->expression;
5471
5472                         ir_asm_constraint constraint;
5473                         constraint.pos              = pos;
5474                         constraint.constraint       = new_id_from_str(constraints);
5475                         constraint.mode             = mode_M;
5476                         tmp_in_constraints[in_size] = constraint;
5477
5478                         ins[in_size] = expression_to_addr(expr);
5479                         ++in_size;
5480                         continue;
5481                 } else {
5482                         errorf(&statement->base.pos,
5483                                "only modifiers but no place set in constraints '%s'",
5484                                constraints);
5485                         continue;
5486                 }
5487
5488                 ir_asm_constraint constraint;
5489                 constraint.pos        = pos;
5490                 constraint.constraint = new_id_from_str(constraints);
5491                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5492
5493                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5494         }
5495         assert(obstack_object_size(&asm_obst)
5496                         == out_size * sizeof(ir_asm_constraint));
5497         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5498
5499
5500         obstack_grow(&asm_obst, tmp_in_constraints,
5501                      in_size * sizeof(tmp_in_constraints[0]));
5502         /* find and count input and output arguments */
5503         argument = statement->inputs;
5504         for ( ; argument != NULL; argument = argument->next) {
5505                 const char *constraints = argument->constraints.begin;
5506                 asm_constraint_flags_t asm_flags
5507                         = be_parse_asm_constraints(constraints);
5508
5509                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5510                         errorf(&statement->base.pos,
5511                                "some constraints in '%s' are not supported", constraints);
5512                         continue;
5513                 }
5514                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5515                         errorf(&statement->base.pos,
5516                                "some constraints in '%s' are invalid", constraints);
5517                         continue;
5518                 }
5519                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5520                         errorf(&statement->base.pos,
5521                                "write flag specified for input constraints '%s'",
5522                                constraints);
5523                         continue;
5524                 }
5525
5526                 ir_node *input;
5527                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5528                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5529                         /* we can treat this as "normal" input */
5530                         input = expression_to_value(argument->expression);
5531                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5532                         /* pure memory ops need no input (but we have to make sure we
5533                          * attach to the memory) */
5534                         assert(! (asm_flags &
5535                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5536                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5537                         needs_memory = true;
5538                         input = expression_to_addr(argument->expression);
5539                 } else {
5540                         errorf(&statement->base.pos,
5541                                "only modifiers but no place set in constraints '%s'",
5542                                constraints);
5543                         continue;
5544                 }
5545
5546                 ir_asm_constraint constraint;
5547                 constraint.pos        = next_pos++;
5548                 constraint.constraint = new_id_from_str(constraints);
5549                 constraint.mode       = get_irn_mode(input);
5550
5551                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5552                 ins[in_size++] = input;
5553         }
5554
5555         ir_node *mem = needs_memory ? get_store() : new_NoMem();
5556         assert(obstack_object_size(&asm_obst)
5557                         == in_size * sizeof(ir_asm_constraint));
5558         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5559
5560         /* create asm node */
5561         dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5562
5563         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5564
5565         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5566                                   out_size, output_constraints,
5567                                   n_clobbers, clobbers, asm_text);
5568
5569         if (statement->is_volatile) {
5570                 set_irn_pinned(node, op_pin_state_pinned);
5571         } else {
5572                 set_irn_pinned(node, op_pin_state_floats);
5573         }
5574
5575         /* create output projs & connect them */
5576         if (needs_memory) {
5577                 ir_node *projm = new_Proj(node, mode_M, out_size);
5578                 set_store(projm);
5579         }
5580
5581         size_t i;
5582         for (i = 0; i < out_size; ++i) {
5583                 const expression_t *out_expr = out_exprs[i];
5584                 long                pn       = i;
5585                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5586                 ir_node            *proj     = new_Proj(node, mode, pn);
5587                 ir_node            *addr     = out_addrs[i];
5588
5589                 set_value_for_expression_addr(out_expr, proj, addr);
5590         }
5591
5592         return NULL;
5593 }
5594
5595 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5596 {
5597         statement_to_firm(statement->try_statement);
5598         position_t const *const pos = &statement->base.pos;
5599         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5600         return NULL;
5601 }
5602
5603 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5604 {
5605         errorf(&statement->base.pos, "__leave not supported yet");
5606         return NULL;
5607 }
5608
5609 /**
5610  * Transform a statement.
5611  */
5612 static ir_node *statement_to_firm(statement_t *const stmt)
5613 {
5614 #ifndef NDEBUG
5615         assert(!stmt->base.transformed);
5616         stmt->base.transformed = true;
5617 #endif
5618
5619         switch (stmt->kind) {
5620         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5621         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5622         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5623         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5624         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5625         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5626         case STATEMENT_EMPTY:         return NULL; /* nothing */
5627         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5628         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5629         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
5630         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5631         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5632         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5633         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5634         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5635         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5636
5637         {
5638                 jump_target *tgt;
5639         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
5640         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5641 jump:
5642                 jump_to_target(tgt);
5643                 set_unreachable_now();
5644                 return NULL;
5645         }
5646
5647         case STATEMENT_ERROR: panic("error statement");
5648         }
5649         panic("statement not implemented");
5650 }
5651
5652 static int count_local_variables(const entity_t *entity,
5653                                  const entity_t *const last)
5654 {
5655         int count = 0;
5656         entity_t const *const end = last != NULL ? last->base.next : NULL;
5657         for (; entity != end; entity = entity->base.next) {
5658                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5659                     !var_needs_entity(&entity->variable)) {
5660                         ++count;
5661                         if (is_type_complex(skip_typeref(entity->declaration.type)))
5662                                 ++count;
5663                 }
5664         }
5665         return count;
5666 }
5667
5668 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5669 {
5670         int *const count = env;
5671
5672         switch (stmt->kind) {
5673         case STATEMENT_DECLARATION: {
5674                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5675                 *count += count_local_variables(decl_stmt->declarations_begin,
5676                                 decl_stmt->declarations_end);
5677                 break;
5678         }
5679
5680         case STATEMENT_FOR:
5681                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5682                 break;
5683
5684         default:
5685                 break;
5686         }
5687 }
5688
5689 /**
5690  * Return the number of local (alias free) variables used by a function.
5691  */
5692 static int get_function_n_local_vars(entity_t *entity)
5693 {
5694         const function_t *function = &entity->function;
5695         int count = 0;
5696
5697         /* count parameters */
5698         count += count_local_variables(function->parameters.entities, NULL);
5699
5700         /* count local variables declared in body */
5701         walk_statements(function->body, count_local_variables_in_stmt, &count);
5702         return count;
5703 }
5704
5705 /**
5706  * Build Firm code for the parameters of a function.
5707  */
5708 static void initialize_function_parameters(entity_t *entity)
5709 {
5710         assert(entity->kind == ENTITY_FUNCTION);
5711         ir_graph *irg             = current_ir_graph;
5712         ir_node  *args            = get_irg_args(irg);
5713         int       n               = 0;
5714         ir_type  *function_irtype;
5715
5716         if (entity->function.need_closure) {
5717                 /* add an extra parameter for the static link */
5718                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5719                 ++n;
5720
5721                 /* Matze: IMO this is wrong, nested functions should have an own
5722                  * type and not rely on strange parameters... */
5723                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5724         } else {
5725                 function_irtype = get_ir_type(entity->declaration.type);
5726         }
5727
5728         entity_t *parameter = entity->function.parameters.entities;
5729         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5730                 if (parameter->kind != ENTITY_PARAMETER)
5731                         continue;
5732
5733                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5734                 type_t *type = skip_typeref(parameter->declaration.type);
5735
5736                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.pos);
5737                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5738                 if (var_needs_entity(&parameter->variable)) {
5739                         ir_type   *frame_type = get_irg_frame_type(irg);
5740                         ir_entity *param
5741                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5742                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5743                         parameter->variable.v.entity = param;
5744                 } else if (is_type_complex(type)) {
5745                         ir_type   *frame_type = get_irg_frame_type(irg);
5746                         ir_entity *param
5747                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5748                         ir_node   *nomem = get_irg_no_mem(irg);
5749                         ir_node   *frame = get_irg_frame(irg);
5750                         ir_node   *addr  = new_simpleSel(nomem, frame, param);
5751                         complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5752
5753                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5754                         parameter->variable.v.value_number = next_value_number_function;
5755                         set_irg_loc_description(irg, next_value_number_function,
5756                                                                         parameter);
5757                         set_irg_loc_description(irg, next_value_number_function+1,
5758                                                                         parameter);
5759                         set_value(next_value_number_function, value.real);
5760                         set_value(next_value_number_function+1, value.imag);
5761                         next_value_number_function += 2;
5762                 } else {
5763                         ir_mode *param_mode = get_type_mode(param_irtype);
5764                         long     pn         = n;
5765                         ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5766                         value = conv_to_storage_type(dbgi, value, type);
5767
5768                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5769                         parameter->variable.v.value_number = next_value_number_function;
5770                         set_irg_loc_description(irg, next_value_number_function,
5771                                                                         parameter);
5772                         ++next_value_number_function;
5773
5774                         set_value(parameter->variable.v.value_number, value);
5775                 }
5776         }
5777 }
5778
5779 static void add_function_pointer(ir_type *segment, ir_entity *method,
5780                                  const char *unique_template)
5781 {
5782         ir_type   *method_type  = get_entity_type(method);
5783         ir_type   *ptr_type     = new_type_pointer(method_type);
5784
5785         /* these entities don't really have a name but firm only allows
5786          * "" in ld_ident.
5787          * Note that we mustn't give these entities a name since for example
5788          * Mach-O doesn't allow them. */
5789         ident     *ide          = id_unique(unique_template);
5790         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5791         ir_graph  *irg          = get_const_code_irg();
5792         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5793                                                            method);
5794
5795         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5796         set_entity_compiler_generated(ptr, 1);
5797         set_entity_visibility(ptr, ir_visibility_private);
5798         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5799         set_atomic_ent_value(ptr, val);
5800 }
5801
5802 /**
5803  * Create code for a function and all inner functions.
5804  *
5805  * @param entity  the function entity
5806  */
5807 static void create_function(entity_t *entity)
5808 {
5809         assert(entity->kind == ENTITY_FUNCTION);
5810         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5811
5812         if (entity->function.body == NULL)
5813                 return;
5814
5815         inner_functions     = NULL;
5816         current_trampolines = NULL;
5817
5818         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5819                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5820                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5821         }
5822         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5823                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5824                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5825         }
5826
5827         current_function_entity = entity;
5828         current_function_name   = NULL;
5829         current_funcsig         = NULL;
5830
5831         assert(!ijmp_ops);
5832         assert(!ijmp_blocks);
5833         init_jump_target(&ijmp_target, NULL);
5834         ijmp_ops    = NEW_ARR_F(ir_node*, 0);
5835         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5836
5837         int       n_local_vars = get_function_n_local_vars(entity);
5838         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5839         current_ir_graph = irg;
5840
5841         ir_graph *old_current_function = current_function;
5842         current_function = irg;
5843
5844         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5845         current_vararg_entity = NULL;
5846
5847         set_irg_fp_model(irg, firm_fp_model);
5848         set_irn_dbg_info(get_irg_start_block(irg),
5849                          get_entity_dbg_info(function_entity));
5850
5851         next_value_number_function = 0;
5852         initialize_function_parameters(entity);
5853         current_static_link = entity->function.static_link;
5854
5855         statement_to_firm(entity->function.body);
5856
5857         ir_node *end_block = get_irg_end_block(irg);
5858
5859         /* do we have a return statement yet? */
5860         if (currently_reachable()) {
5861                 type_t *type = skip_typeref(entity->declaration.type);
5862                 assert(is_type_function(type));
5863                 type_t *const return_type = skip_typeref(type->function.return_type);
5864
5865                 ir_node *ret;
5866                 if (is_type_void(return_type)) {
5867                         ret = new_Return(get_store(), 0, NULL);
5868                 } else {
5869                         ir_mode *const mode = get_ir_mode_storage(return_type);
5870
5871                         ir_node *in[1];
5872                         /* §5.1.2.2.3 main implicitly returns 0 */
5873                         if (is_main(entity)) {
5874                                 in[0] = new_Const(get_mode_null(mode));
5875                         } else {
5876                                 in[0] = new_Unknown(mode);
5877                         }
5878                         ret = new_Return(get_store(), 1, in);
5879                 }
5880                 add_immBlock_pred(end_block, ret);
5881         }
5882
5883         if (enter_jump_target(&ijmp_target)) {
5884                 keep_loop();
5885                 size_t   const n    = ARR_LEN(ijmp_ops);
5886                 ir_node *const op   = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5887                 ir_node *const ijmp = new_IJmp(op);
5888                 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5889                         ir_node *const block = ijmp_blocks[i];
5890                         add_immBlock_pred(block, ijmp);
5891                         mature_immBlock(block);
5892                 }
5893         }
5894
5895         DEL_ARR_F(ijmp_ops);
5896         DEL_ARR_F(ijmp_blocks);
5897         ijmp_ops    = NULL;
5898         ijmp_blocks = NULL;
5899
5900         irg_finalize_cons(irg);
5901
5902         /* finalize the frame type */
5903         ir_type *frame_type = get_irg_frame_type(irg);
5904         int      n          = get_compound_n_members(frame_type);
5905         int      align_all  = 4;
5906         int      offset     = 0;
5907         for (int i = 0; i < n; ++i) {
5908                 ir_entity *member      = get_compound_member(frame_type, i);
5909                 ir_type   *entity_type = get_entity_type(member);
5910
5911                 int align = get_type_alignment_bytes(entity_type);
5912                 if (align > align_all)
5913                         align_all = align;
5914                 int misalign = 0;
5915                 if (align > 0) {
5916                         misalign  = offset % align;
5917                         if (misalign > 0) {
5918                                 offset += align - misalign;
5919                         }
5920                 }
5921
5922                 set_entity_offset(member, offset);
5923                 offset += get_type_size_bytes(entity_type);
5924         }
5925         set_type_size_bytes(frame_type, offset);
5926         set_type_alignment_bytes(frame_type, align_all);
5927
5928         irg_verify(irg, VERIFY_ENFORCE_SSA);
5929         current_vararg_entity = old_current_vararg_entity;
5930         current_function      = old_current_function;
5931
5932         if (current_trampolines != NULL) {
5933                 DEL_ARR_F(current_trampolines);
5934                 current_trampolines = NULL;
5935         }
5936
5937         /* create inner functions if any */
5938         entity_t **inner = inner_functions;
5939         if (inner != NULL) {
5940                 ir_type *rem_outer_frame      = current_outer_frame;
5941                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5942                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5943                         create_function(inner[i]);
5944                 }
5945                 DEL_ARR_F(inner);
5946
5947                 current_outer_frame      = rem_outer_frame;
5948         }
5949 }
5950
5951 static void scope_to_firm(scope_t *scope)
5952 {
5953         /* first pass: create declarations */
5954         entity_t *entity = scope->entities;
5955         for ( ; entity != NULL; entity = entity->base.next) {
5956                 if (entity->base.symbol == NULL)
5957                         continue;
5958
5959                 if (entity->kind == ENTITY_FUNCTION) {
5960                         if (entity->function.btk != BUILTIN_NONE) {
5961                                 /* builtins have no representation */
5962                                 continue;
5963                         }
5964                         (void)get_function_entity(entity, NULL);
5965                 } else if (entity->kind == ENTITY_VARIABLE) {
5966                         create_global_variable(entity);
5967                 } else if (entity->kind == ENTITY_NAMESPACE) {
5968                         scope_to_firm(&entity->namespacee.members);
5969                 }
5970         }
5971
5972         /* second pass: create code/initializers */
5973         entity = scope->entities;
5974         for ( ; entity != NULL; entity = entity->base.next) {
5975                 if (entity->base.symbol == NULL)
5976                         continue;
5977
5978                 if (entity->kind == ENTITY_FUNCTION) {
5979                         if (entity->function.btk != BUILTIN_NONE) {
5980                                 /* builtins have no representation */
5981                                 continue;
5982                         }
5983                         create_function(entity);
5984                 } else if (entity->kind == ENTITY_VARIABLE) {
5985                         assert(entity->declaration.kind
5986                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5987                         current_ir_graph = get_const_code_irg();
5988                         create_variable_initializer(entity);
5989                 }
5990         }
5991 }
5992
5993 void init_ast2firm(void)
5994 {
5995         obstack_init(&asm_obst);
5996         init_atomic_modes();
5997
5998         ir_set_debug_retrieve(dbg_retrieve);
5999         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6000
6001         /* create idents for all known runtime functions */
6002         for (size_t i = 0; i < lengthof(rts_data); ++i) {
6003                 rts_idents[i] = new_id_from_str(rts_data[i].name);
6004         }
6005
6006         entitymap_init(&entitymap);
6007 }
6008
6009 static void init_ir_types(void)
6010 {
6011         static int ir_types_initialized = 0;
6012         if (ir_types_initialized)
6013                 return;
6014         ir_types_initialized = 1;
6015
6016         ir_type_char = get_ir_type(type_char);
6017
6018         be_params             = be_get_backend_param();
6019         mode_float_arithmetic = be_params->mode_float_arithmetic;
6020
6021         stack_param_align     = be_params->stack_param_align;
6022 }
6023
6024 void exit_ast2firm(void)
6025 {
6026         entitymap_destroy(&entitymap);
6027         obstack_free(&asm_obst, NULL);
6028 }
6029
6030 static void global_asm_to_firm(statement_t *s)
6031 {
6032         for (; s != NULL; s = s->base.next) {
6033                 assert(s->kind == STATEMENT_ASM);
6034
6035                 char const *const text = s->asms.asm_text.begin;
6036                 size_t      const size = s->asms.asm_text.size;
6037                 ident      *const id   = new_id_from_chars(text, size);
6038                 add_irp_asm(id);
6039         }
6040 }
6041
6042 static const char *get_cwd(void)
6043 {
6044         static char buf[1024];
6045         if (buf[0] == '\0') {
6046                 return getcwd(buf, sizeof(buf));
6047         }
6048         return buf;
6049 }
6050
6051 void translation_unit_to_firm(translation_unit_t *unit)
6052 {
6053         if (c_mode & _CXX) {
6054                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6055         } else if (c_mode & _C99) {
6056                 be_dwarf_set_source_language(DW_LANG_C99);
6057         } else if (c_mode & _C89) {
6058                 be_dwarf_set_source_language(DW_LANG_C89);
6059         } else {
6060                 be_dwarf_set_source_language(DW_LANG_C);
6061         }
6062         const char *cwd = get_cwd();
6063         if (cwd != NULL) {
6064                 be_dwarf_set_compilation_directory(cwd);
6065         }
6066
6067         /* initialize firm arithmetic */
6068         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6069         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6070
6071         /* just to be sure */
6072         init_jump_target(&break_target,    NULL);
6073         init_jump_target(&continue_target, NULL);
6074         current_switch           = NULL;
6075         current_translation_unit = unit;
6076
6077         init_ir_types();
6078
6079         scope_to_firm(&unit->scope);
6080         global_asm_to_firm(unit->global_asm);
6081
6082         current_ir_graph         = NULL;
6083         current_translation_unit = NULL;
6084 }