nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2012 Matthias Braun <matze@braunis.de>
   4  */
   5 #include <config.h>
   6
   7 #include <assert.h>
   8 #include <string.h>
   9 #include <stdbool.h>
  10 #include <unistd.h>
  11 #include <limits.h>
  12
  13 #include <libfirm/firm.h>
  14 #include <libfirm/adt/obst.h>
  15 #include <libfirm/be.h>
  16
  17 #include "ast2firm.h"
  18
  19 #include "adt/error.h"
  20 #include "adt/array.h"
  21 #include "adt/strutil.h"
  22 #include "adt/util.h"
  23 #include "jump_target.h"
  24 #include "symbol_t.h"
  25 #include "token_t.h"
  26 #include "type_t.h"
  27 #include "ast_t.h"
  28 #include "entity_t.h"
  29 #include "parser.h"
  30 #include "diagnostic.h"
  31 #include "lang_features.h"
  32 #include "types.h"
  33 #include "type_hash.h"
  34 #include "mangle.h"
  35 #include "walk.h"
  36 #include "warning.h"
  37 #include "printer.h"
  38 #include "entitymap_t.h"
  39 #include "driver/firm_opt.h"
  40
  41 typedef struct trampoline_region trampoline_region;
  42 struct trampoline_region {
  43         ir_entity        *function;    /**< The function that is called by this trampoline */
  44         ir_entity        *region;      /**< created region for the trampoline */
  45 };
  46
  47 typedef struct complex_value {
  48         ir_node *real;
  49         ir_node *imag;
  50 } complex_value;
  51
  52 typedef struct complex_constant {
  53         ir_tarval *real;
  54         ir_tarval *imag;
  55 } complex_constant;
  56
  57 fp_model_t firm_fp_model = fp_model_precise;
  58
  59 static const backend_params *be_params;
  60
  61 static ir_type *ir_type_char;
  62
  63 /* architecture specific floating point arithmetic mode (if any) */
  64 static ir_mode *mode_float_arithmetic;
  65
  66 /* alignment of stack parameters */
  67 static unsigned stack_param_align;
  68
  69 static int         next_value_number_function;
  70 static jump_target continue_target;
  71 static jump_target break_target;
  72 static ir_node    *current_switch;
  73 static bool        saw_default_label;
  74 static entity_t  **inner_functions;
  75 static jump_target ijmp_target;
  76 static ir_node   **ijmp_ops;
  77 static ir_node   **ijmp_blocks;
  78 static bool        constant_folding;
  79
  80 #define PUSH_BREAK(val) \
  81         jump_target const old_break_target = break_target; \
  82         (init_jump_target(&break_target, (val)))
  83 #define POP_BREAK() \
  84         ((void)(break_target = old_break_target))
  85
  86 #define PUSH_CONTINUE(val) \
  87         jump_target const old_continue_target = continue_target; \
  88         (init_jump_target(&continue_target, (val)))
  89 #define POP_CONTINUE() \
  90         ((void)(continue_target = old_continue_target))
  91
  92 #define PUSH_IRG(val) \
  93         ir_graph *const old_irg = current_ir_graph; \
  94         ir_graph *const new_irg = (val); \
  95         ((void)(current_ir_graph = new_irg))
  96
  97 #define POP_IRG() \
  98         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
  99
 100 static const entity_t     *current_function_entity;
 101 static ir_node            *current_function_name;
 102 static ir_node            *current_funcsig;
 103 static ir_graph           *current_function;
 104 static translation_unit_t *current_translation_unit;
 105 static trampoline_region  *current_trampolines;
 106 static ir_type            *current_outer_frame;
 107 static ir_node            *current_static_link;
 108 static ir_entity          *current_vararg_entity;
 109
 110 static entitymap_t  entitymap;
 111
 112 static struct obstack asm_obst;
 113
 114 typedef enum declaration_kind_t {
 115         DECLARATION_KIND_UNKNOWN,
 116         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 117         DECLARATION_KIND_GLOBAL_VARIABLE,
 118         DECLARATION_KIND_LOCAL_VARIABLE,
 119         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 120         DECLARATION_KIND_PARAMETER,
 121         DECLARATION_KIND_PARAMETER_ENTITY,
 122         DECLARATION_KIND_FUNCTION,
 123         DECLARATION_KIND_COMPOUND_MEMBER,
 124         DECLARATION_KIND_INNER_FUNCTION
 125 } declaration_kind_t;
 126
 127 static ir_type *get_ir_type_incomplete(type_t *type);
 128
 129 static void enqueue_inner_function(entity_t *entity)
 130 {
 131         if (inner_functions == NULL)
 132                 inner_functions = NEW_ARR_F(entity_t *, 0);
 133         ARR_APP1(entity_t*, inner_functions, entity);
 134 }
 135
 136 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 137 {
 138         const entity_t *entity = get_irg_loc_description(irg, pos);
 139
 140         if (entity != NULL) {
 141                 position_t const *const pos = &entity->base.pos;
 142                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 143         }
 144         return new_r_Unknown(irg, mode);
 145 }
 146
 147 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 148 {
 149         position_t const *const pos = (position_t const*)dbg;
 150         if (pos) {
 151                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 152         } else {
 153                 return (src_loc_t){ NULL, 0, 0 };
 154         }
 155 }
 156
 157 static dbg_info *get_dbg_info(const position_t *pos)
 158 {
 159         return (dbg_info*) pos;
 160 }
 161
 162 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 163                                     const type_dbg_info *dbg)
 164 {
 165         assert(dbg != NULL);
 166         print_to_buffer(buffer, buffer_size);
 167         const type_t *type = (const type_t*) dbg;
 168         print_type(type);
 169         finish_print_to_buffer();
 170 }
 171
 172 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 173 {
 174         return (type_dbg_info*) type;
 175 }
 176
 177 /* is the current block a reachable one? */
 178 static bool currently_reachable(void)
 179 {
 180         ir_node *const block = get_cur_block();
 181         return block != NULL && !is_Bad(block);
 182 }
 183
 184 static void set_unreachable_now(void)
 185 {
 186         set_cur_block(NULL);
 187 }
 188
 189 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 190
 191 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
 192 static ir_node *expression_to_value(expression_t const *expr);
 193 static complex_value expression_to_complex(const expression_t *expression);
 194
 195 static unsigned decide_modulo_shift(unsigned type_size)
 196 {
 197         if (architecture_modulo_shift == 0)
 198                 return 0;
 199         if (type_size < architecture_modulo_shift)
 200                 return architecture_modulo_shift;
 201         return type_size;
 202 }
 203
 204 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 205 {
 206         unsigned flags = get_atomic_type_flags(kind);
 207         unsigned size  = get_atomic_type_size(kind);
 208         if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
 209                 switch (size) {
 210                 case 4:  return get_modeF();
 211                 case 8:  return get_modeD();
 212                 default: panic("unexpected kind");
 213                 }
 214         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 215                 char            name[64];
 216                 unsigned        bit_size     = size * 8;
 217                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 218                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 219
 220                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 221                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 222                                     modulo_shift);
 223         }
 224
 225         return NULL;
 226 }
 227
 228 /**
 229  * Initialises the atomic modes depending on the machine size.
 230  */
 231 static void init_atomic_modes(void)
 232 {
 233         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 234         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 235                 if (atomic_modes[i] != NULL)
 236                         continue;
 237                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 238         }
 239 }
 240
 241 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 242 {
 243         assert(kind <= ATOMIC_TYPE_LAST);
 244         return atomic_modes[kind];
 245 }
 246
 247 static ir_node *get_vla_size(array_type_t *const type)
 248 {
 249         ir_node *size_node = type->size_node;
 250         if (size_node == NULL) {
 251                 size_node = expression_to_value(type->size_expression);
 252                 type->size_node = size_node;
 253         }
 254         return size_node;
 255 }
 256
 257 static unsigned count_parameters(const function_type_t *function_type)
 258 {
 259         unsigned count = 0;
 260
 261         function_parameter_t *parameter = function_type->parameters;
 262         for ( ; parameter != NULL; parameter = parameter->next) {
 263                 ++count;
 264         }
 265
 266         return count;
 267 }
 268
 269 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
 270                                         type_dbg_info *dbgi)
 271 {
 272         ir_mode        *mode      = atomic_modes[akind];
 273         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 274         unsigned        alignment = get_atomic_type_alignment(akind);
 275         unsigned        size      = get_atomic_type_size(akind);
 276
 277         set_type_size_bytes(irtype, size);
 278         set_type_alignment_bytes(irtype, alignment);
 279
 280         return irtype;
 281 }
 282
 283 /**
 284  * Creates a Firm type for an atomic type
 285  */
 286 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 287 {
 288         type_dbg_info *dbgi = get_type_dbg_info_(type);
 289         return create_primitive_irtype(akind, dbgi);
 290 }
 291
 292 /**
 293  * Creates a Firm type for a complex type
 294  */
 295 static ir_type *create_complex_type(atomic_type_kind_t akind,
 296                                     const type_t *type)
 297 {
 298         type_dbg_info *dbgi   = get_type_dbg_info_(type);
 299         ir_type       *etype  = create_primitive_irtype(akind, NULL);
 300         ir_type       *irtype = new_d_type_array(1, etype, dbgi);
 301
 302         int align = get_type_alignment_bytes(etype);
 303         set_type_alignment_bytes(irtype, align);
 304         unsigned n_elements = 2;
 305         set_array_bounds_int(irtype, 0, 0, n_elements);
 306         size_t elemsize = get_type_size_bytes(etype);
 307         if (elemsize % align > 0) {
 308                 elemsize += align - (elemsize % align);
 309         }
 310         set_type_size_bytes(irtype, n_elements * elemsize);
 311         set_type_state(irtype, layout_fixed);
 312
 313         return irtype;
 314 }
 315
 316 /**
 317  * Creates a Firm type for an imaginary type
 318  */
 319 static ir_type *create_imaginary_type(const atomic_type_t *type)
 320 {
 321         return create_atomic_type(type->akind, (const type_t*)type);
 322 }
 323
 324 /**
 325  * return type of a parameter (and take transparent union gnu extension into
 326  * account)
 327  */
 328 static type_t *get_parameter_type(type_t *orig_type)
 329 {
 330         type_t *type = skip_typeref(orig_type);
 331         if (is_type_union(type)
 332                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 333                 compound_t *compound = type->compound.compound;
 334                 type                 = compound->members.entities->declaration.type;
 335         }
 336
 337         return type;
 338 }
 339
 340 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 341 {
 342         type_t        *return_type  = skip_typeref(function_type->return_type);
 343
 344         int            n_parameters = count_parameters(function_type)
 345                                        + (for_closure ? 1 : 0);
 346         int            n_results    = is_type_void(return_type) ? 0 : 1;
 347         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 348         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 349
 350         if (!is_type_void(return_type)) {
 351                 ir_type *restype = get_ir_type(return_type);
 352                 set_method_res_type(irtype, 0, restype);
 353         }
 354
 355         function_parameter_t *parameter = function_type->parameters;
 356         int                   n         = 0;
 357         if (for_closure) {
 358                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 359                 set_method_param_type(irtype, n, p_irtype);
 360                 ++n;
 361         }
 362         for ( ; parameter != NULL; parameter = parameter->next) {
 363                 type_t  *type     = get_parameter_type(parameter->type);
 364                 ir_type *p_irtype = get_ir_type(type);
 365                 set_method_param_type(irtype, n, p_irtype);
 366                 ++n;
 367         }
 368
 369         bool is_variadic = function_type->variadic;
 370
 371         if (is_variadic)
 372                 set_method_variadicity(irtype, variadicity_variadic);
 373
 374         unsigned cc = get_method_calling_convention(irtype);
 375         switch (function_type->calling_convention) {
 376         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 377         case CC_CDECL:
 378 is_cdecl:
 379                 set_method_calling_convention(irtype, SET_CDECL(cc));
 380                 break;
 381
 382         case CC_STDCALL:
 383                 if (is_variadic)
 384                         goto is_cdecl;
 385
 386                 /* only non-variadic function can use stdcall, else use cdecl */
 387                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 388                 break;
 389
 390         case CC_FASTCALL:
 391                 if (is_variadic)
 392                         goto is_cdecl;
 393                 /* only non-variadic function can use fastcall, else use cdecl */
 394                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 395                 break;
 396
 397         case CC_THISCALL:
 398                 /* Hmm, leave default, not accepted by the parser yet. */
 399                 break;
 400         }
 401
 402         if (for_closure)
 403                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 404
 405         const decl_modifiers_t modifiers = function_type->modifiers;
 406         if (modifiers & DM_CONST)
 407                 add_method_additional_properties(irtype, mtp_property_const);
 408         if (modifiers & DM_PURE)
 409                 add_method_additional_properties(irtype, mtp_property_pure);
 410         if (modifiers & DM_RETURNS_TWICE)
 411                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 412         if (modifiers & DM_NORETURN)
 413                 add_method_additional_properties(irtype, mtp_property_noreturn);
 414         if (modifiers & DM_NOTHROW)
 415                 add_method_additional_properties(irtype, mtp_property_nothrow);
 416         if (modifiers & DM_MALLOC)
 417                 add_method_additional_properties(irtype, mtp_property_malloc);
 418
 419         return irtype;
 420 }
 421
 422 static ir_type *create_pointer_type(pointer_type_t *type)
 423 {
 424         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 425         type_t        *points_to    = type->points_to;
 426         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 427         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 428
 429         return irtype;
 430 }
 431
 432 static ir_type *create_reference_type(reference_type_t *type)
 433 {
 434         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 435         type_t        *refers_to    = type->refers_to;
 436         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 437         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 438
 439         return irtype;
 440 }
 441
 442 static ir_type *create_array_type(array_type_t *type)
 443 {
 444         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 445         type_t        *element_type    = type->element_type;
 446         ir_type       *ir_element_type = get_ir_type(element_type);
 447         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 448
 449         const int align = get_type_alignment_bytes(ir_element_type);
 450         set_type_alignment_bytes(irtype, align);
 451
 452         if (type->size_constant) {
 453                 int n_elements = type->size;
 454
 455                 set_array_bounds_int(irtype, 0, 0, n_elements);
 456
 457                 size_t elemsize = get_type_size_bytes(ir_element_type);
 458                 if (elemsize % align > 0) {
 459                         elemsize += align - (elemsize % align);
 460                 }
 461                 set_type_size_bytes(irtype, n_elements * elemsize);
 462         } else {
 463                 set_array_lower_bound_int(irtype, 0, 0);
 464         }
 465         set_type_state(irtype, layout_fixed);
 466
 467         return irtype;
 468 }
 469
 470 /**
 471  * Return the signed integer type of size bits.
 472  *
 473  * @param size   the size
 474  */
 475 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 476                                                  unsigned size,
 477                                                                                                  const type_t *type)
 478 {
 479         static ir_mode *s_modes[64 + 1] = {NULL, };
 480         ir_type *res;
 481         ir_mode *mode;
 482
 483         if (size <= 0 || size > 64)
 484                 return NULL;
 485
 486         mode = s_modes[size];
 487         if (mode == NULL) {
 488                 char name[32];
 489
 490                 snprintf(name, sizeof(name), "bf_I%u", size);
 491                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 492                 s_modes[size] = mode;
 493         }
 494
 495         type_dbg_info *dbgi = get_type_dbg_info_(type);
 496         res                 = new_d_type_primitive(mode, dbgi);
 497         set_primitive_base_type(res, base_tp);
 498
 499         return res;
 500 }
 501
 502 /**
 503  * Return the unsigned integer type of size bits.
 504  *
 505  * @param size   the size
 506  */
 507 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 508                                                    unsigned size,
 509                                                                                                    const type_t *type)
 510 {
 511         static ir_mode *u_modes[64 + 1] = {NULL, };
 512         ir_type *res;
 513         ir_mode *mode;
 514
 515         if (size <= 0 || size > 64)
 516                 return NULL;
 517
 518         mode = u_modes[size];
 519         if (mode == NULL) {
 520                 char name[32];
 521
 522                 snprintf(name, sizeof(name), "bf_U%u", size);
 523                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 524                 u_modes[size] = mode;
 525         }
 526
 527         type_dbg_info *dbgi = get_type_dbg_info_(type);
 528         res = new_d_type_primitive(mode, dbgi);
 529         set_primitive_base_type(res, base_tp);
 530
 531         return res;
 532 }
 533
 534 static ir_type *create_bitfield_type(const entity_t *entity)
 535 {
 536         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 537         type_t *base = skip_typeref(entity->declaration.type);
 538         assert(is_type_integer(base));
 539         ir_type *irbase = get_ir_type(base);
 540
 541         unsigned bit_size = entity->compound_member.bit_size;
 542
 543         if (is_type_signed(base)) {
 544                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 545         } else {
 546                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 547         }
 548 }
 549
 550 /**
 551  * Construct firm type from ast struct type.
 552  */
 553 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 554 {
 555         compound_t *compound = type->compound;
 556
 557         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 558                 return compound->irtype;
 559         }
 560
 561         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 562
 563         symbol_t *type_symbol = compound->base.symbol;
 564         ident    *id;
 565         if (type_symbol != NULL) {
 566                 id = new_id_from_str(type_symbol->string);
 567         } else {
 568                 if (is_union) {
 569                         id = id_unique("__anonymous_union.%u");
 570                 } else {
 571                         id = id_unique("__anonymous_struct.%u");
 572                 }
 573         }
 574
 575         ir_type *irtype;
 576         if (is_union) {
 577                 irtype = new_type_union(id);
 578         } else {
 579                 irtype = new_type_struct(id);
 580         }
 581
 582         compound->irtype_complete = false;
 583         compound->irtype          = irtype;
 584
 585         if (incomplete)
 586                 return irtype;
 587
 588         if (is_union) {
 589                 layout_union_type(type);
 590         } else {
 591                 layout_struct_type(type);
 592         }
 593
 594         compound->irtype_complete = true;
 595
 596         entity_t *entry = compound->members.entities;
 597         for ( ; entry != NULL; entry = entry->base.next) {
 598                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 599                         continue;
 600
 601                 symbol_t *symbol     = entry->base.symbol;
 602                 type_t   *entry_type = entry->declaration.type;
 603                 ident    *ident;
 604                 if (symbol == NULL) {
 605                         /* anonymous bitfield member, skip */
 606                         if (entry->compound_member.bitfield)
 607                                 continue;
 608                         assert(is_type_compound(entry_type));
 609                         ident = id_unique("anon.%u");
 610                 } else {
 611                         ident = new_id_from_str(symbol->string);
 612                 }
 613
 614                 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
 615
 616                 ir_type *entry_irtype;
 617                 if (entry->compound_member.bitfield) {
 618                         entry_irtype = create_bitfield_type(entry);
 619                 } else {
 620                         entry_irtype = get_ir_type(entry_type);
 621                 }
 622                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 623
 624                 set_entity_offset(entity, entry->compound_member.offset);
 625                 set_entity_offset_bits_remainder(entity,
 626                                                  entry->compound_member.bit_offset);
 627
 628                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 629                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 630                 entry->compound_member.entity = entity;
 631         }
 632
 633         set_type_alignment_bytes(irtype, compound->alignment);
 634         set_type_size_bytes(irtype, compound->size);
 635         set_type_state(irtype, layout_fixed);
 636
 637         return irtype;
 638 }
 639
 640 void determine_enum_values(enum_type_t *const type)
 641 {
 642         ir_mode   *const mode    = atomic_modes[type->base.akind];
 643         ir_tarval *const one     = get_mode_one(mode);
 644         ir_tarval *      tv_next = get_mode_null(mode);
 645
 646         enum_t   *enume = type->enume;
 647         entity_t *entry = enume->base.next;
 648         for (; entry != NULL; entry = entry->base.next) {
 649                 if (entry->kind != ENTITY_ENUM_VALUE)
 650                         break;
 651
 652                 expression_t *const init = entry->enum_value.value;
 653                 if (init != NULL) {
 654                         tv_next = fold_constant_to_tarval(init);
 655                 }
 656                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 657                 entry->enum_value.tv = tv_next;
 658                 tv_next = tarval_add(tv_next, one);
 659         }
 660 }
 661
 662 static ir_type *create_enum_type(enum_type_t *const type)
 663 {
 664         return create_atomic_type(type->base.akind, (const type_t*) type);
 665 }
 666
 667 static ir_type *get_ir_type_incomplete(type_t *type)
 668 {
 669         type = skip_typeref(type);
 670
 671         if (type->base.firm_type != NULL) {
 672                 return type->base.firm_type;
 673         }
 674
 675         if (is_type_compound(type)) {
 676                 return create_compound_type(&type->compound, true);
 677         } else {
 678                 return get_ir_type(type);
 679         }
 680 }
 681
 682 ir_type *get_ir_type(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         ir_type *firm_type = NULL;
 691         switch (type->kind) {
 692         case TYPE_ATOMIC:
 693                 firm_type = create_atomic_type(type->atomic.akind, type);
 694                 break;
 695         case TYPE_COMPLEX:
 696                 firm_type = create_complex_type(type->atomic.akind, type);
 697                 break;
 698         case TYPE_IMAGINARY:
 699                 firm_type = create_imaginary_type(&type->atomic);
 700                 break;
 701         case TYPE_FUNCTION:
 702                 firm_type = create_method_type(&type->function, false);
 703                 break;
 704         case TYPE_POINTER:
 705                 firm_type = create_pointer_type(&type->pointer);
 706                 break;
 707         case TYPE_REFERENCE:
 708                 firm_type = create_reference_type(&type->reference);
 709                 break;
 710         case TYPE_ARRAY:
 711                 firm_type = create_array_type(&type->array);
 712                 break;
 713         case TYPE_COMPOUND_STRUCT:
 714         case TYPE_COMPOUND_UNION:
 715                 firm_type = create_compound_type(&type->compound, false);
 716                 break;
 717         case TYPE_ENUM:
 718                 firm_type = create_enum_type(&type->enumt);
 719                 break;
 720
 721         case TYPE_ERROR:
 722         case TYPE_TYPEOF:
 723         case TYPE_TYPEDEF:
 724                 break;
 725         }
 726         if (firm_type == NULL)
 727                 panic("unknown type found");
 728
 729         type->base.firm_type = firm_type;
 730         return firm_type;
 731 }
 732
 733 static ir_mode *get_ir_mode_storage(type_t *type)
 734 {
 735         type = skip_typeref(type);
 736
 737         /* Firm doesn't report a mode for arrays and structs/unions. */
 738         if (!is_type_scalar(type) || is_type_complex(type)) {
 739                 return mode_P_data;
 740         }
 741
 742         ir_type *const irtype = get_ir_type(type);
 743         ir_mode *const mode   = get_type_mode(irtype);
 744         assert(mode != NULL);
 745         return mode;
 746 }
 747
 748 static ir_mode *get_complex_mode_storage(type_t *type)
 749 {
 750         assert(is_type_complex(skip_typeref(type)));
 751         ir_type *const irtype = get_ir_type(type);
 752         ir_type *const etype  = get_array_element_type(irtype);
 753         ir_mode *const mode   = get_type_mode(etype);
 754         return mode;
 755 }
 756
 757 /*
 758  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 759  * int that it returns bigger modes for floating point on some platforms
 760  * (x87 internally does arithemtic with 80bits)
 761  */
 762 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 763 {
 764         ir_mode *mode = get_ir_mode_storage(type);
 765         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 766                 return mode_float_arithmetic;
 767         }
 768
 769         return mode;
 770 }
 771
 772 static ir_mode *get_complex_mode_arithmetic(type_t *type)
 773 {
 774         ir_mode *mode = get_complex_mode_storage(type);
 775         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 776                 return mode_float_arithmetic;
 777         }
 778
 779         return mode;
 780 }
 781
 782 /**
 783  * Return a node representing the size of a type.
 784  */
 785 static ir_node *get_type_size_node(type_t *type)
 786 {
 787         ir_mode *const mode = get_ir_mode_storage(type_size_t);
 788         type = skip_typeref(type);
 789
 790         if (is_type_array(type) && type->array.is_vla) {
 791                 ir_node *size_node = get_vla_size(&type->array);
 792                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 793                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 794                 return real_size;
 795         }
 796
 797         unsigned const size = get_type_size(type);
 798         return new_Const_long(mode, size);
 799 }
 800
 801 /** Names of the runtime functions. */
 802 static const struct {
 803         int        id;           /**< the rts id */
 804         int        n_res;        /**< number of return values */
 805         const char *name;        /**< the name of the rts function */
 806         int        n_params;     /**< number of parameters */
 807         unsigned   flags;        /**< language flags */
 808 } rts_data[] = {
 809         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 810         { rts_abort,      0, "abort",        0, _C89 },
 811         { rts_alloca,     1, "alloca",       1, _ALL },
 812         { rts_abs,        1, "abs",          1, _C89 },
 813         { rts_labs,       1, "labs",         1, _C89 },
 814         { rts_llabs,      1, "llabs",        1, _C99 },
 815         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 816
 817         { rts_fabs,       1, "fabs",         1, _C89 },
 818         { rts_sqrt,       1, "sqrt",         1, _C89 },
 819         { rts_cbrt,       1, "cbrt",         1, _C99 },
 820         { rts_exp,        1, "exp",          1, _C89 },
 821         { rts_exp2,       1, "exp2",         1, _C89 },
 822         { rts_exp10,      1, "exp10",        1, _GNUC },
 823         { rts_log,        1, "log",          1, _C89 },
 824         { rts_log2,       1, "log2",         1, _C89 },
 825         { rts_log10,      1, "log10",        1, _C89 },
 826         { rts_pow,        1, "pow",          2, _C89 },
 827         { rts_sin,        1, "sin",          1, _C89 },
 828         { rts_cos,        1, "cos",          1, _C89 },
 829         { rts_tan,        1, "tan",          1, _C89 },
 830         { rts_asin,       1, "asin",         1, _C89 },
 831         { rts_acos,       1, "acos",         1, _C89 },
 832         { rts_atan,       1, "atan",         1, _C89 },
 833         { rts_sinh,       1, "sinh",         1, _C89 },
 834         { rts_cosh,       1, "cosh",         1, _C89 },
 835         { rts_tanh,       1, "tanh",         1, _C89 },
 836
 837         { rts_fabsf,      1, "fabsf",        1, _C99 },
 838         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 839         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 840         { rts_expf,       1, "expf",         1, _C99 },
 841         { rts_exp2f,      1, "exp2f",        1, _C99 },
 842         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 843         { rts_logf,       1, "logf",         1, _C99 },
 844         { rts_log2f,      1, "log2f",        1, _C99 },
 845         { rts_log10f,     1, "log10f",       1, _C99 },
 846         { rts_powf,       1, "powf",         2, _C99 },
 847         { rts_sinf,       1, "sinf",         1, _C99 },
 848         { rts_cosf,       1, "cosf",         1, _C99 },
 849         { rts_tanf,       1, "tanf",         1, _C99 },
 850         { rts_asinf,      1, "asinf",        1, _C99 },
 851         { rts_acosf,      1, "acosf",        1, _C99 },
 852         { rts_atanf,      1, "atanf",        1, _C99 },
 853         { rts_sinhf,      1, "sinhf",        1, _C99 },
 854         { rts_coshf,      1, "coshf",        1, _C99 },
 855         { rts_tanhf,      1, "tanhf",        1, _C99 },
 856
 857         { rts_fabsl,      1, "fabsl",        1, _C99 },
 858         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 859         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 860         { rts_expl,       1, "expl",         1, _C99 },
 861         { rts_exp2l,      1, "exp2l",        1, _C99 },
 862         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 863         { rts_logl,       1, "logl",         1, _C99 },
 864         { rts_log2l,      1, "log2l",        1, _C99 },
 865         { rts_log10l,     1, "log10l",       1, _C99 },
 866         { rts_powl,       1, "powl",         2, _C99 },
 867         { rts_sinl,       1, "sinl",         1, _C99 },
 868         { rts_cosl,       1, "cosl",         1, _C99 },
 869         { rts_tanl,       1, "tanl",         1, _C99 },
 870         { rts_asinl,      1, "asinl",        1, _C99 },
 871         { rts_acosl,      1, "acosl",        1, _C99 },
 872         { rts_atanl,      1, "atanl",        1, _C99 },
 873         { rts_sinhl,      1, "sinhl",        1, _C99 },
 874         { rts_coshl,      1, "coshl",        1, _C99 },
 875         { rts_tanhl,      1, "tanhl",        1, _C99 },
 876
 877         { rts_strcmp,     1, "strcmp",       2, _C89 },
 878         { rts_strncmp,    1, "strncmp",      3, _C89 },
 879         { rts_strcpy,     1, "strcpy",       2, _C89 },
 880         { rts_strlen,     1, "strlen",       1, _C89 },
 881         { rts_memcpy,     1, "memcpy",       3, _C89 },
 882         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 883         { rts_memmove,    1, "memmove",      3, _C89 },
 884         { rts_memset,     1, "memset",       3, _C89 },
 885         { rts_memcmp,     1, "memcmp",       3, _C89 },
 886 };
 887
 888 static ident *rts_idents[lengthof(rts_data)];
 889
 890 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 891
 892 void set_create_ld_ident(ident *(*func)(entity_t*))
 893 {
 894         create_ld_ident = func;
 895 }
 896
 897 static bool declaration_is_definition(const entity_t *entity)
 898 {
 899         switch (entity->kind) {
 900         case ENTITY_VARIABLE:
 901                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 902         case ENTITY_FUNCTION:
 903                 return entity->function.body != NULL;
 904         case ENTITY_PARAMETER:
 905         case ENTITY_COMPOUND_MEMBER:
 906                 return false;
 907         case ENTITY_TYPEDEF:
 908         case ENTITY_ENUM:
 909         case ENTITY_ENUM_VALUE:
 910         case ENTITY_NAMESPACE:
 911         case ENTITY_LABEL:
 912         case ENTITY_LOCAL_LABEL:
 913                 break;
 914         }
 915         panic("entity is not a declaration");
 916 }
 917
 918 /**
 919  * Handle GNU attributes for entities
 920  *
 921  * @param ent   the entity
 922  * @param decl  the routine declaration
 923  */
 924 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 925 {
 926         assert(is_declaration(entity));
 927         decl_modifiers_t modifiers = entity->declaration.modifiers;
 928
 929         if (is_method_entity(irentity)) {
 930                 if (modifiers & DM_PURE)
 931                         add_entity_additional_properties(irentity, mtp_property_pure);
 932                 if (modifiers & DM_CONST)
 933                         add_entity_additional_properties(irentity, mtp_property_const);
 934                 if (modifiers & DM_NOINLINE)
 935                         add_entity_additional_properties(irentity, mtp_property_noinline);
 936                 if (modifiers & DM_FORCEINLINE)
 937                         add_entity_additional_properties(irentity, mtp_property_always_inline);
 938                 if (modifiers & DM_NAKED)
 939                         add_entity_additional_properties(irentity, mtp_property_naked);
 940                 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
 941                         add_entity_additional_properties(irentity,
 942                                                                                          mtp_property_inline_recommended);
 943         }
 944         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 945                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 946         }
 947         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 948             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 949                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 950         }
 951 }
 952
 953 static bool is_main(entity_t *entity)
 954 {
 955         static symbol_t *sym_main = NULL;
 956         if (sym_main == NULL) {
 957                 sym_main = symbol_table_insert("main");
 958         }
 959
 960         if (entity->base.symbol != sym_main)
 961                 return false;
 962         /* must be in outermost scope */
 963         if (entity->base.parent_scope != &current_translation_unit->scope)
 964                 return false;
 965
 966         return true;
 967 }
 968
 969 /**
 970  * Creates an entity representing a function.
 971  *
 972  * @param entity       the function declaration/definition
 973  * @param owner_type   the owner type of this function, NULL
 974  *                     for global functions
 975  */
 976 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 977 {
 978         assert(entity->kind == ENTITY_FUNCTION);
 979         if (entity->function.irentity != NULL)
 980                 return entity->function.irentity;
 981
 982         switch (entity->function.btk) {
 983         case BUILTIN_NONE:
 984         case BUILTIN_LIBC:
 985         case BUILTIN_LIBC_CHECK:
 986                 break;
 987         default:
 988                 return NULL;
 989         }
 990
 991         symbol_t *symbol = entity->base.symbol;
 992         ident    *id     = new_id_from_str(symbol->string);
 993
 994         /* already an entity defined? */
 995         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 996         bool const has_body = entity->function.body != NULL;
 997         if (irentity != NULL) {
 998                 goto entity_created;
 999         }
1000
1001         ir_type *ir_type_method;
1002         if (entity->function.need_closure)
1003                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
1004         else
1005                 ir_type_method = get_ir_type(entity->declaration.type);
1006
1007         bool nested_function = false;
1008         if (owner_type == NULL)
1009                 owner_type = get_glob_type();
1010         else
1011                 nested_function = true;
1012
1013         dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
1014         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1015
1016         ident *ld_id;
1017         if (nested_function)
1018                 ld_id = id_unique("inner.%u");
1019         else
1020                 ld_id = create_ld_ident(entity);
1021         set_entity_ld_ident(irentity, ld_id);
1022
1023         handle_decl_modifiers(irentity, entity);
1024
1025         if (! nested_function) {
1026                 storage_class_tag_t const storage_class
1027                         = (storage_class_tag_t) entity->declaration.storage_class;
1028                 if (storage_class == STORAGE_CLASS_STATIC) {
1029                     set_entity_visibility(irentity, ir_visibility_local);
1030                 } else {
1031                     set_entity_visibility(irentity, ir_visibility_external);
1032                 }
1033
1034                 bool const is_inline = entity->function.is_inline;
1035                 if (is_inline && has_body) {
1036                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1037                             || ((c_mode & _C99) == 0
1038                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1039                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1040                         }
1041                 }
1042         } else {
1043                 /* nested functions are always local */
1044                 set_entity_visibility(irentity, ir_visibility_local);
1045         }
1046
1047         /* We should check for file scope here, but as long as we compile C only
1048            this is not needed. */
1049         if (!freestanding && !has_body) {
1050                 /* check for a known runtime function */
1051                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1052                         if (id != rts_idents[i])
1053                                 continue;
1054
1055                         function_type_t *function_type
1056                                 = &entity->declaration.type->function;
1057                         /* rts_entities code can't handle a "wrong" number of parameters */
1058                         if (function_type->unspecified_parameters)
1059                                 continue;
1060
1061                         /* check number of parameters */
1062                         int n_params = count_parameters(function_type);
1063                         if (n_params != rts_data[i].n_params)
1064                                 continue;
1065
1066                         type_t *return_type = skip_typeref(function_type->return_type);
1067                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1068                         if (n_res != rts_data[i].n_res)
1069                                 continue;
1070
1071                         /* ignore those rts functions not necessary needed for current mode */
1072                         if ((c_mode & rts_data[i].flags) == 0)
1073                                 continue;
1074                         assert(rts_entities[rts_data[i].id] == NULL);
1075                         rts_entities[rts_data[i].id] = irentity;
1076                 }
1077         }
1078
1079         entitymap_insert(&entitymap, symbol, irentity);
1080
1081 entity_created:
1082         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1083         entity->function.irentity = irentity;
1084
1085         return irentity;
1086 }
1087
1088 /**
1089  * Creates a SymConst for a given entity.
1090  *
1091  * @param dbgi    debug info
1092  * @param entity  the entity
1093  */
1094 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1095 {
1096         assert(entity != NULL);
1097         union symconst_symbol sym;
1098         sym.entity_p = entity;
1099         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1100 }
1101
1102 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1103 {
1104         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1105 }
1106
1107 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1108 {
1109         ir_mode *value_mode = get_irn_mode(value);
1110
1111         if (value_mode == dest_mode)
1112                 return value;
1113
1114         return new_d_Conv(dbgi, value, dest_mode);
1115 }
1116
1117 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1118 {
1119         ir_mode *const mode = get_ir_mode_storage(type);
1120         return create_conv(dbgi, val, mode);
1121 }
1122
1123 /**
1124  * Creates a SymConst node representing a string constant.
1125  *
1126  * @param src_pos    the source position of the string constant
1127  * @param id_prefix  a prefix for the name of the generated string constant
1128  * @param value      the value of the string constant
1129  */
1130 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1131 {
1132         size_t            const slen        = get_string_len(value) + 1;
1133         ir_initializer_t *const initializer = create_initializer_compound(slen);
1134         ir_type          *      elem_type;
1135         switch (value->encoding) {
1136         case STRING_ENCODING_CHAR:
1137         case STRING_ENCODING_UTF8: {
1138                 elem_type = ir_type_char;
1139
1140                 ir_mode *const mode = get_type_mode(elem_type);
1141                 char const    *p    = value->begin;
1142                 for (size_t i = 0; i < slen; ++i) {
1143                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1144                         ir_initializer_t *val = create_initializer_tarval(tv);
1145                         set_initializer_compound_value(initializer, i, val);
1146                 }
1147                 goto finish;
1148         }
1149
1150         {
1151                 type_t *type;
1152         case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1153         case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1154         case STRING_ENCODING_WIDE:   type = type_wchar_t;  goto init_wide;
1155 init_wide:;
1156                 elem_type = get_ir_type(type);
1157
1158                 ir_mode *const mode = get_type_mode(elem_type);
1159                 char const    *p    = value->begin;
1160                 for (size_t i = 0; i < slen; ++i) {
1161                         assert(p <= value->begin + value->size);
1162                         utf32             v   = read_utf8_char(&p);
1163                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1164                         ir_initializer_t *val = create_initializer_tarval(tv);
1165                         set_initializer_compound_value(initializer, i, val);
1166                 }
1167                 goto finish;
1168         }
1169         }
1170         panic("invalid string encoding");
1171
1172 finish:;
1173         ir_type *const type = new_type_array(1, elem_type);
1174         set_array_bounds_int(type, 0, 0, slen);
1175         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1176         set_type_state(      type, layout_fixed);
1177
1178         ir_type   *const global_type = get_glob_type();
1179         ident     *const id          = id_unique(id_prefix);
1180         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1181         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1182         set_entity_ld_ident(   entity, id);
1183         set_entity_visibility( entity, ir_visibility_private);
1184         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1185         set_entity_initializer(entity, initializer);
1186
1187         return create_symconst(dbgi, entity);
1188 }
1189
1190 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1191 {
1192         assert(type->kind == TYPE_ATOMIC || type->kind == TYPE_COMPLEX);
1193         atomic_type_kind_t akind = type->atomic.akind;
1194
1195         ir_mode    *const mode = atomic_modes[akind];
1196         char const *const str  = literal->value.begin;
1197         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1198         if (tv == tarval_bad)
1199                 return false;
1200
1201         literal->base.type    = type;
1202         literal->target_value = tv;
1203         return true;
1204 }
1205
1206 void determine_literal_type(literal_expression_t *const literal)
1207 {
1208         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1209
1210         /* -1: signed only, 0: any, 1: unsigned only */
1211         int const sign =
1212                 !is_type_signed(literal->base.type) ? 1 :
1213                 literal->value.begin[0] == '0'      ? 0 :
1214                 -1; /* Decimal literals only try signed types. */
1215
1216         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1217         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1218
1219         if (try_create_integer(literal, literal->base.type))
1220                 goto finished;
1221
1222         /* now try if the constant is small enough for some types */
1223         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1224                 goto finished;
1225         if (sign <= 0 && try_create_integer(literal, type_long))
1226                 goto finished;
1227         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1228                 goto finished;
1229         /* last try? then we should not report tarval_bad */
1230         if (sign < 0)
1231                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1232         if (sign <= 0 && try_create_integer(literal, type_long_long))
1233                 goto finished;
1234
1235         /* last try */
1236         assert(sign >= 0);
1237         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1238         bool res = try_create_integer(literal, type_unsigned_long_long);
1239         if (!res)
1240                 panic("internal error when parsing number literal");
1241
1242 finished:
1243         tarval_set_integer_overflow_mode(old_mode);
1244 }
1245
1246 /**
1247  * Creates a Const node representing a constant.
1248  */
1249 static ir_node *literal_to_firm_(const literal_expression_t *literal,
1250                                  ir_mode *mode)
1251 {
1252         const char *string = literal->value.begin;
1253         size_t      size   = literal->value.size;
1254         ir_tarval  *tv;
1255
1256         switch (literal->base.kind) {
1257         case EXPR_LITERAL_INTEGER:
1258                 assert(literal->target_value != NULL);
1259                 tv = literal->target_value;
1260                 break;
1261
1262         case EXPR_LITERAL_FLOATINGPOINT:
1263                 tv = new_tarval_from_str(string, size, mode);
1264                 break;
1265
1266         case EXPR_LITERAL_BOOLEAN:
1267                 if (string[0] == 't') {
1268                         tv = get_mode_one(mode);
1269                 } else {
1270                         assert(string[0] == 'f');
1271         case EXPR_LITERAL_MS_NOOP:
1272                         tv = get_mode_null(mode);
1273                 }
1274                 break;
1275
1276         default:
1277                 panic("invalid literal kind");
1278         }
1279
1280         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1281         return new_d_Const(dbgi, tv);
1282 }
1283
1284 static ir_node *literal_to_firm(const literal_expression_t *literal)
1285 {
1286         type_t  *type         = skip_typeref(literal->base.type);
1287         ir_mode *mode_storage = get_ir_mode_storage(type);
1288         return literal_to_firm_(literal, mode_storage);
1289 }
1290
1291 /**
1292  * Creates a Const node representing a character constant.
1293  */
1294 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1295 {
1296         type_t     *type   = skip_typeref(literal->base.type);
1297         ir_mode    *mode   = get_ir_mode_storage(type);
1298         const char *string = literal->value.begin;
1299         size_t      size   = literal->value.size;
1300         ir_tarval  *tv;
1301
1302         switch (literal->value.encoding) {
1303         case STRING_ENCODING_WIDE: {
1304                 utf32  v = read_utf8_char(&string);
1305                 char   buf[128];
1306                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1307
1308                 tv = new_tarval_from_str(buf, len, mode);
1309                 break;
1310         }
1311
1312         case STRING_ENCODING_CHAR: {
1313                 long long int v;
1314                 bool char_is_signed
1315                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1316                 if (size == 1 && char_is_signed) {
1317                         v = (signed char)string[0];
1318                 } else {
1319                         v = 0;
1320                         for (size_t i = 0; i < size; ++i) {
1321                                 v = (v << 8) | ((unsigned char)string[i]);
1322                         }
1323                 }
1324                 char   buf[128];
1325                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1326
1327                 tv = new_tarval_from_str(buf, len, mode);
1328                 break;
1329         }
1330
1331         default:
1332                 panic("invalid literal kind");
1333         }
1334
1335         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1336         return new_d_Const(dbgi, tv);
1337 }
1338
1339 /*
1340  * Allocate an area of size bytes aligned at alignment
1341  * at a frame type.
1342  */
1343 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1344 {
1345         static unsigned area_cnt = 0;
1346         char buf[32];
1347
1348         ir_type *tp = new_type_array(1, ir_type_char);
1349         set_array_bounds_int(tp, 0, 0, size);
1350         set_type_alignment_bytes(tp, alignment);
1351
1352         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1353         ident *name = new_id_from_str(buf);
1354         ir_entity *area = new_entity(frame_type, name, tp);
1355
1356         /* mark this entity as compiler generated */
1357         set_entity_compiler_generated(area, 1);
1358         return area;
1359 }
1360
1361 /**
1362  * Return a node representing a trampoline region
1363  * for a given function entity.
1364  *
1365  * @param dbgi    debug info
1366  * @param entity  the function entity
1367  */
1368 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1369 {
1370         ir_entity *region = NULL;
1371         int        i;
1372
1373         if (current_trampolines != NULL) {
1374                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1375                         if (current_trampolines[i].function == entity) {
1376                                 region = current_trampolines[i].region;
1377                                 break;
1378                         }
1379                 }
1380         } else {
1381                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1382         }
1383         ir_graph *irg = current_ir_graph;
1384         if (region == NULL) {
1385                 /* create a new region */
1386                 ir_type           *frame_tp = get_irg_frame_type(irg);
1387                 trampoline_region  reg;
1388                 reg.function = entity;
1389
1390                 reg.region   = alloc_trampoline(frame_tp,
1391                                                 be_params->trampoline_size,
1392                                                 be_params->trampoline_align);
1393                 ARR_APP1(trampoline_region, current_trampolines, reg);
1394                 region = reg.region;
1395         }
1396         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1397                                region);
1398 }
1399
1400 /**
1401  * Creates a trampoline for a function represented by an entity.
1402  *
1403  * @param dbgi    debug info
1404  * @param mode    the (reference) mode for the function address
1405  * @param entity  the function entity
1406  */
1407 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1408                                   ir_entity *entity)
1409 {
1410         assert(entity != NULL);
1411         ir_node *in[3];
1412         in[0] = get_trampoline_region(dbgi, entity);
1413         in[1] = create_symconst(dbgi, entity);
1414         in[2] = get_irg_frame(current_ir_graph);
1415
1416         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1417         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1418         return new_Proj(irn, mode, pn_Builtin_max+1);
1419 }
1420
1421 /**
1422  * Dereference an address.
1423  *
1424  * @param dbgi  debug info
1425  * @param type  the type of the dereferenced result (the points_to type)
1426  * @param addr  the address to dereference
1427  */
1428 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1429                                       ir_node *const addr)
1430 {
1431         type_t *skipped = skip_typeref(type);
1432         if (is_type_incomplete(skipped))
1433                 return addr;
1434
1435         ir_type *irtype = get_ir_type(skipped);
1436         if (is_compound_type(irtype)
1437             || is_Method_type(irtype)
1438             || is_Array_type(irtype)) {
1439                 return addr;
1440         }
1441
1442         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1443                                   ? cons_volatile : cons_none;
1444         ir_mode *const mode     = get_type_mode(irtype);
1445         ir_node *const memory   = get_store();
1446         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1447         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1448         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1449
1450         set_store(load_mem);
1451         return load_res;
1452 }
1453
1454 /**
1455  * Returns the correct base address depending on whether it is a parameter or a
1456  * normal local variable.
1457  */
1458 static ir_node *get_local_frame(ir_entity *const ent)
1459 {
1460         ir_graph      *const irg   = current_ir_graph;
1461         const ir_type *const owner = get_entity_owner(ent);
1462         if (owner == current_outer_frame) {
1463                 assert(current_static_link != NULL);
1464                 return current_static_link;
1465         } else {
1466                 return get_irg_frame(irg);
1467         }
1468 }
1469
1470 /**
1471  * Keep the current block and memory.
1472  * This is necessary for all loops, because they could become infinite.
1473  */
1474 static void keep_loop(void)
1475 {
1476         keep_alive(get_cur_block());
1477         keep_alive(get_store());
1478 }
1479
1480 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1481 {
1482         entity_t *entity = ref->entity;
1483         if (entity->enum_value.tv == NULL) {
1484                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1485                 assert(type->kind == TYPE_ENUM);
1486                 determine_enum_values(&type->enumt);
1487         }
1488
1489         return new_Const(entity->enum_value.tv);
1490 }
1491
1492 static ir_node *reference_addr(const reference_expression_t *ref)
1493 {
1494         dbg_info *dbgi   = get_dbg_info(&ref->base.pos);
1495         entity_t *entity = ref->entity;
1496         assert(is_declaration(entity));
1497
1498         if (entity->kind == ENTITY_FUNCTION
1499             && entity->function.btk != BUILTIN_NONE) {
1500                 ir_entity *irentity = get_function_entity(entity, NULL);
1501                 /* for gcc compatibility we have to produce (dummy) addresses for some
1502                  * builtins which don't have entities */
1503                 if (irentity == NULL) {
1504                         position_t const *const pos = &ref->base.pos;
1505                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1506
1507                         /* simply create a NULL pointer */
1508                         ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1509                         return new_Const(get_mode_null(mode));
1510                 }
1511         }
1512
1513         switch ((declaration_kind_t) entity->declaration.kind) {
1514         case DECLARATION_KIND_UNKNOWN:
1515                 break;
1516         case DECLARATION_KIND_PARAMETER:
1517         case DECLARATION_KIND_LOCAL_VARIABLE:
1518                 /* you can store to a local variable (so we don't panic but return NULL
1519                  * as an indicator for no real address) */
1520                 return NULL;
1521         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1522                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1523                 return addr;
1524         }
1525
1526         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1527         case DECLARATION_KIND_PARAMETER_ENTITY: {
1528                 ir_entity *irentity = entity->variable.v.entity;
1529                 ir_node   *frame    = get_local_frame(irentity);
1530                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1531                 return sel;
1532         }
1533
1534         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1535                 return entity->variable.v.vla_base;
1536
1537         case DECLARATION_KIND_FUNCTION: {
1538                 return create_symconst(dbgi, entity->function.irentity);
1539         }
1540
1541         case DECLARATION_KIND_INNER_FUNCTION: {
1542                 type_t  *const type = skip_typeref(entity->declaration.type);
1543                 ir_mode *const mode = get_ir_mode_storage(type);
1544                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1545                         /* inner function not using the closure */
1546                         return create_symconst(dbgi, entity->function.irentity);
1547                 } else {
1548                         /* need trampoline here */
1549                         return create_trampoline(dbgi, mode, entity->function.irentity);
1550                 }
1551         }
1552
1553         case DECLARATION_KIND_COMPOUND_MEMBER:
1554                 panic("not implemented reference type");
1555         }
1556
1557         panic("reference to declaration with unknown type");
1558 }
1559
1560 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1561 {
1562         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
1563         entity_t *const entity = ref->entity;
1564         assert(is_declaration(entity));
1565
1566         switch ((declaration_kind_t)entity->declaration.kind) {
1567         case DECLARATION_KIND_LOCAL_VARIABLE:
1568         case DECLARATION_KIND_PARAMETER: {
1569                 type_t  *const type  = skip_typeref(entity->declaration.type);
1570                 ir_mode *const mode  = get_ir_mode_storage(type);
1571                 return get_value(entity->variable.v.value_number, mode);
1572         }
1573
1574         default: {
1575                 ir_node *const addr = reference_addr(ref);
1576                 return deref_address(dbgi, entity->declaration.type, addr);
1577         }
1578         }
1579 }
1580
1581 /**
1582  * Transform calls to builtin functions.
1583  */
1584 static ir_node *process_builtin_call(const call_expression_t *call)
1585 {
1586         dbg_info *dbgi = get_dbg_info(&call->base.pos);
1587
1588         assert(call->function->kind == EXPR_REFERENCE);
1589         reference_expression_t *builtin = &call->function->reference;
1590
1591         type_t *expr_type = skip_typeref(builtin->base.type);
1592         assert(is_type_pointer(expr_type));
1593
1594         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1595
1596         switch (builtin->entity->function.btk) {
1597         case BUILTIN_NONE:
1598                 break;
1599         case BUILTIN_ALLOCA: {
1600                 expression_t *argument = call->arguments->expression;
1601                 ir_node      *size     = expression_to_value(argument);
1602
1603                 ir_node *store  = get_store();
1604                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1605                                               stack_alloc);
1606                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1607                 set_store(proj_m);
1608                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1609
1610                 return res;
1611         }
1612         case BUILTIN_INF: {
1613                 type_t    *type = function_type->function.return_type;
1614                 ir_mode   *mode = get_ir_mode_storage(type);
1615                 ir_tarval *tv   = get_mode_infinite(mode);
1616                 ir_node   *res  = new_d_Const(dbgi, tv);
1617                 return res;
1618         }
1619         case BUILTIN_NAN: {
1620                 /* Ignore string for now... */
1621                 assert(is_type_function(function_type));
1622                 type_t    *type = function_type->function.return_type;
1623                 ir_mode   *mode = get_ir_mode_storage(type);
1624                 ir_tarval *tv   = get_mode_NAN(mode);
1625                 ir_node   *res  = new_d_Const(dbgi, tv);
1626                 return res;
1627         }
1628         case BUILTIN_EXPECT: {
1629                 expression_t *argument = call->arguments->expression;
1630                 return expression_to_value(argument);
1631         }
1632         case BUILTIN_VA_END:
1633                 /* evaluate the argument of va_end for its side effects */
1634                 expression_to_value(call->arguments->expression);
1635                 return NULL;
1636         case BUILTIN_OBJECT_SIZE: {
1637                 /* determine value of "type" */
1638                 expression_t *type_expression = call->arguments->next->expression;
1639                 long          type_val        = fold_constant_to_int(type_expression);
1640                 type_t       *type            = function_type->function.return_type;
1641                 ir_mode      *mode            = get_ir_mode_storage(type);
1642                 /* just produce a "I don't know" result */
1643                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1644                                                 get_mode_minus_one(mode);
1645
1646                 return new_d_Const(dbgi, result);
1647         }
1648         case BUILTIN_ROTL: {
1649                 ir_node *val  = expression_to_value(call->arguments->expression);
1650                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1651                 ir_mode *mode = get_irn_mode(val);
1652                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1653                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1654         }
1655         case BUILTIN_ROTR: {
1656                 ir_node *val  = expression_to_value(call->arguments->expression);
1657                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1658                 ir_mode *mode = get_irn_mode(val);
1659                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1660                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1661                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1662                 return new_d_Rotl(dbgi, val, sub, mode);
1663         }
1664         case BUILTIN_FIRM:
1665                 break;
1666         case BUILTIN_LIBC:
1667         case BUILTIN_LIBC_CHECK:
1668                 panic("builtin did not produce an entity");
1669         }
1670         panic("invalid builtin");
1671 }
1672
1673 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
1674                                   complex_value value);
1675
1676 /**
1677  * Transform a call expression.
1678  * Handles some special cases, like alloca() calls, which must be resolved
1679  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1680  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1681  * handled right...
1682  */
1683 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1684 {
1685         dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1686         assert(currently_reachable());
1687
1688         expression_t   *function = call->function;
1689         ir_node        *callee   = NULL;
1690         bool            firm_builtin = false;
1691         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1692         if (function->kind == EXPR_REFERENCE) {
1693                 const reference_expression_t *ref    = &function->reference;
1694                 entity_t                     *entity = ref->entity;
1695
1696                 if (entity->kind == ENTITY_FUNCTION) {
1697                         builtin_kind_t builtin = entity->function.btk;
1698                         if (builtin == BUILTIN_FIRM) {
1699                                 firm_builtin = true;
1700                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1701                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1702                                    && builtin != BUILTIN_LIBC_CHECK) {
1703                                 return process_builtin_call(call);
1704                         }
1705                 }
1706         }
1707         if (!firm_builtin)
1708                 callee = expression_to_value(function);
1709
1710         type_t *type = skip_typeref(function->base.type);
1711         assert(is_type_pointer(type));
1712         pointer_type_t *pointer_type = &type->pointer;
1713         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1714         assert(is_type_function(points_to));
1715         function_type_t *function_type = &points_to->function;
1716
1717         int      n_parameters    = 0;
1718         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1719         ir_type *new_method_type = NULL;
1720         if (function_type->variadic || function_type->unspecified_parameters) {
1721                 const call_argument_t *argument = call->arguments;
1722                 for ( ; argument != NULL; argument = argument->next) {
1723                         ++n_parameters;
1724                 }
1725
1726                 /* we need to construct a new method type matching the call
1727                  * arguments... */
1728                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1729                 int n_res       = get_method_n_ress(ir_method_type);
1730                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1731                 set_method_calling_convention(new_method_type,
1732                                get_method_calling_convention(ir_method_type));
1733                 set_method_additional_properties(new_method_type,
1734                                get_method_additional_properties(ir_method_type));
1735                 set_method_variadicity(new_method_type,
1736                                        get_method_variadicity(ir_method_type));
1737
1738                 for (int i = 0; i < n_res; ++i) {
1739                         set_method_res_type(new_method_type, i,
1740                                             get_method_res_type(ir_method_type, i));
1741                 }
1742                 argument = call->arguments;
1743                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1744                         expression_t *expression = argument->expression;
1745                         ir_type      *irtype     = get_ir_type(expression->base.type);
1746                         set_method_param_type(new_method_type, i, irtype);
1747                 }
1748                 ir_method_type = new_method_type;
1749         } else {
1750                 n_parameters = get_method_n_params(ir_method_type);
1751         }
1752
1753         ir_node *in[n_parameters];
1754
1755         const call_argument_t *argument = call->arguments;
1756         for (int n = 0; n < n_parameters; ++n) {
1757                 expression_t *expression = argument->expression;
1758                 type_t *const arg_type = skip_typeref(expression->base.type);
1759                 if (is_type_complex(arg_type)) {
1760                         complex_value value = expression_to_complex(expression);
1761                         in[n] = complex_to_memory(dbgi, arg_type, value);
1762                 } else {
1763                         in[n] = conv_to_storage_type(dbgi, expression_to_value(expression), arg_type);
1764                 }
1765
1766                 argument = argument->next;
1767         }
1768
1769         ir_node *store;
1770         if (function_type->modifiers & DM_CONST) {
1771                 store = get_irg_no_mem(current_ir_graph);
1772         } else {
1773                 store = get_store();
1774         }
1775
1776         ir_node *node;
1777         type_t  *return_type = skip_typeref(function_type->return_type);
1778         ir_node *result      = NULL;
1779         if (firm_builtin) {
1780                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1781                                      ir_method_type);
1782                 if (! (function_type->modifiers & DM_CONST)) {
1783                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1784                         set_store(mem);
1785                 }
1786
1787                 if (!is_type_void(return_type)) {
1788                         assert(is_type_scalar(return_type));
1789                         ir_mode *mode = get_ir_mode_storage(return_type);
1790                         result = new_Proj(node, mode, pn_Builtin_max+1);
1791                 }
1792         } else {
1793                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1794                 if (! (function_type->modifiers & DM_CONST)) {
1795                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1796                         set_store(mem);
1797                 }
1798
1799                 if (!is_type_void(return_type)) {
1800                         ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1801                         ir_mode *const mode    = get_ir_mode_storage(return_type);
1802                         result                 = new_Proj(resproj, mode, 0);
1803                 }
1804         }
1805
1806         if (function_type->modifiers & DM_NORETURN) {
1807                 /* A dead end:  Keep the Call and the Block.  Also place all further
1808                  * nodes into a new and unreachable block. */
1809                 keep_alive(node);
1810                 keep_alive(get_cur_block());
1811                 ir_node *block = new_Block(0, NULL);
1812                 set_cur_block(block);
1813         }
1814
1815         return result;
1816 }
1817
1818 static ir_node *statement_to_firm(statement_t *statement);
1819 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1820 static ir_node *expression_to_addr(const expression_t *expression);
1821
1822 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1823                          ir_node *value)
1824 {
1825         value = conv_to_storage_type(dbgi, value, type);
1826
1827         ir_node *memory = get_store();
1828
1829         if (is_type_scalar(type) && !is_type_complex(type)) {
1830                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1831                                       ? cons_volatile : cons_none;
1832                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1833                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1834                 set_store(store_mem);
1835         } else {
1836                 ir_type *irtype    = get_ir_type(type);
1837                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1838                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1839                 set_store(copyb_mem);
1840         }
1841 }
1842
1843 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1844 {
1845         ir_tarval *all_one   = get_mode_all_one(mode);
1846         int        mode_size = get_mode_size_bits(mode);
1847         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1848
1849         assert(offset >= 0);
1850         assert(size   >= 0);
1851         assert(offset + size <= mode_size);
1852         if (size == mode_size) {
1853                 return all_one;
1854         }
1855
1856         long       shiftr    = get_mode_size_bits(mode) - size;
1857         long       shiftl    = offset;
1858         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1859         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1860         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1861         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1862
1863         return mask1;
1864 }
1865
1866 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1867                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1868                 bool need_return)
1869 {
1870         ir_type *entity_type = get_entity_type(entity);
1871         ir_type *base_type   = get_primitive_base_type(entity_type);
1872         ir_mode *mode        = get_type_mode(base_type);
1873         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1874
1875         value = create_conv(dbgi, value, mode);
1876
1877         /* kill upper bits of value and shift to right position */
1878         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1879         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1880         unsigned  base_bits  = get_mode_size_bits(mode);
1881         unsigned  shiftwidth = base_bits - bitsize;
1882
1883         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1884         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1885
1886         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1887         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1888         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1889
1890         /* load current value */
1891         ir_node   *mem             = get_store();
1892         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1893                                           set_volatile ? cons_volatile : cons_none);
1894         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1895         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1896         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1897         ir_tarval *inv_mask        = tarval_not(shift_mask);
1898         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1899         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1900
1901         /* construct new value and store */
1902         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1903         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1904                                          set_volatile ? cons_volatile : cons_none);
1905         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1906         set_store(store_mem);
1907
1908         if (!need_return)
1909                 return NULL;
1910
1911         ir_node *res_shr;
1912         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1913         if (mode_is_signed(mode)) {
1914                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1915         } else {
1916                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1917         }
1918         return res_shr;
1919 }
1920
1921 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1922                                          ir_node *addr)
1923 {
1924         dbg_info *dbgi      = get_dbg_info(&expression->base.pos);
1925         entity_t *entity    = expression->compound_entry;
1926         type_t   *base_type = entity->declaration.type;
1927         ir_mode  *mode      = get_ir_mode_storage(base_type);
1928         ir_node  *mem       = get_store();
1929         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1930         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1931         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1932         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1933
1934         ir_mode  *amode     = mode;
1935         /* optimisation, since shifting in modes < machine_size is usually
1936          * less efficient */
1937         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1938                 amode = mode_uint;
1939         }
1940         unsigned amode_size = get_mode_size_bits(amode);
1941         load_res = create_conv(dbgi, load_res, amode);
1942
1943         set_store(load_mem);
1944
1945         /* kill upper bits */
1946         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1947         unsigned   bitoffset   = entity->compound_member.bit_offset;
1948         unsigned   bitsize     = entity->compound_member.bit_size;
1949         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1950         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1951         ir_node   *countl      = new_d_Const(dbgi, tvl);
1952         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1953
1954         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1955         assert(shift_bitsr <= amode_size);
1956         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1957         ir_node   *countr      = new_d_Const(dbgi, tvr);
1958         ir_node   *shiftr;
1959         if (mode_is_signed(mode)) {
1960                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1961         } else {
1962                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1963         }
1964
1965         return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1966 }
1967
1968 /* make sure the selected compound type is constructed */
1969 static void construct_select_compound(const select_expression_t *expression)
1970 {
1971         type_t *type = skip_typeref(expression->compound->base.type);
1972         if (is_type_pointer(type)) {
1973                 type = type->pointer.points_to;
1974         }
1975         (void) get_ir_type(type);
1976 }
1977
1978 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1979                                               ir_node *value, ir_node *addr)
1980 {
1981         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1982         type_t   *type = skip_typeref(expression->base.type);
1983         value = conv_to_storage_type(dbgi, value, type);
1984
1985         if (expression->kind == EXPR_REFERENCE) {
1986                 const reference_expression_t *ref = &expression->reference;
1987
1988                 entity_t *entity = ref->entity;
1989                 assert(is_declaration(entity));
1990                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1991                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1992                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1993                         set_value(entity->variable.v.value_number, value);
1994                         return value;
1995                 }
1996         }
1997
1998         if (addr == NULL)
1999                 addr = expression_to_addr(expression);
2000         assert(addr != NULL);
2001
2002         if (expression->kind == EXPR_SELECT) {
2003                 const select_expression_t *select = &expression->select;
2004
2005                 construct_select_compound(select);
2006
2007                 entity_t *entity = select->compound_entry;
2008                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2009                 if (entity->compound_member.bitfield) {
2010                         ir_entity *irentity = entity->compound_member.entity;
2011                         bool       set_volatile
2012                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2013                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2014                                                        set_volatile, true);
2015                         return value;
2016                 }
2017         }
2018
2019         assign_value(dbgi, addr, type, value);
2020         return value;
2021 }
2022
2023 static ir_node *get_value_from_lvalue(const expression_t *expression,
2024                                       ir_node *addr)
2025 {
2026         if (expression->kind == EXPR_REFERENCE) {
2027                 const reference_expression_t *ref = &expression->reference;
2028
2029                 entity_t *entity = ref->entity;
2030                 assert(entity->kind == ENTITY_VARIABLE
2031                                 || entity->kind == ENTITY_PARAMETER);
2032                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2033                 int value_number;
2034                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2035                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2036                         value_number = entity->variable.v.value_number;
2037                         assert(addr == NULL);
2038                         type_t  *type = skip_typeref(expression->base.type);
2039                         ir_mode *mode = get_ir_mode_storage(type);
2040                         return get_value(value_number, mode);
2041                 }
2042         }
2043
2044         assert(addr != NULL);
2045         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2046
2047         ir_node *value;
2048         if (expression->kind == EXPR_SELECT &&
2049             expression->select.compound_entry->compound_member.bitfield) {
2050             construct_select_compound(&expression->select);
2051                 value = bitfield_extract_to_firm(&expression->select, addr);
2052         } else {
2053                 value = deref_address(dbgi, expression->base.type, addr);
2054         }
2055
2056         return value;
2057 }
2058
2059 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2060 {
2061         type_t  *const type = skip_typeref(expr->base.type);
2062         ir_mode *const mode = get_ir_mode_arithmetic(type);
2063
2064         ir_node *offset;
2065         if (is_type_pointer(type)) {
2066                 offset = get_type_size_node(type->pointer.points_to);
2067         } else {
2068                 assert(is_type_arithmetic(type));
2069                 offset = new_Const(get_mode_one(mode));
2070         }
2071
2072         dbg_info           *const dbgi        = get_dbg_info(&expr->base.pos);
2073         expression_t const *const value_expr  = expr->value;
2074         ir_node            *const addr        = expression_to_addr(value_expr);
2075         ir_node            *const value       = get_value_from_lvalue(value_expr, addr);
2076         ir_node            *const value_arith = create_conv(dbgi, value, mode);
2077         ir_node            *const new_value   = inc
2078                 ? new_d_Add(dbgi, value_arith, offset, mode)
2079                 : new_d_Sub(dbgi, value_arith, offset, mode);
2080
2081         ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2082         return pre ? store_value : value;
2083 }
2084
2085 static bool is_local_variable(expression_t *expression)
2086 {
2087         if (expression->kind != EXPR_REFERENCE)
2088                 return false;
2089         reference_expression_t *ref_expr = &expression->reference;
2090         entity_t               *entity   = ref_expr->entity;
2091         if (entity->kind != ENTITY_VARIABLE)
2092                 return false;
2093         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2094         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2095 }
2096
2097 static ir_relation get_relation(const expression_kind_t kind)
2098 {
2099         switch (kind) {
2100         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2101         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2102         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2103         case EXPR_BINARY_ISLESS:
2104         case EXPR_BINARY_LESS:          return ir_relation_less;
2105         case EXPR_BINARY_ISLESSEQUAL:
2106         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2107         case EXPR_BINARY_ISGREATER:
2108         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2109         case EXPR_BINARY_ISGREATEREQUAL:
2110         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2111         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2112
2113         default:
2114                 break;
2115         }
2116         panic("trying to get ir_relation from non-comparison binexpr type");
2117 }
2118
2119 /**
2120  * Handle the assume optimizer hint: check if a Confirm
2121  * node can be created.
2122  *
2123  * @param dbi    debug info
2124  * @param expr   the IL assume expression
2125  *
2126  * we support here only some simple cases:
2127  *  - var rel const
2128  *  - const rel val
2129  *  - var rel var
2130  */
2131 static ir_node *handle_assume_compare(dbg_info *dbi,
2132                                       const binary_expression_t *expression)
2133 {
2134         expression_t *op1 = expression->left;
2135         expression_t *op2 = expression->right;
2136         entity_t     *var2, *var = NULL;
2137         ir_node      *res      = NULL;
2138         ir_relation   relation = get_relation(expression->base.kind);
2139
2140         if (is_local_variable(op1) && is_local_variable(op2)) {
2141                 var  = op1->reference.entity;
2142             var2 = op2->reference.entity;
2143
2144                 type_t  *const type = skip_typeref(var->declaration.type);
2145                 ir_mode *const mode = get_ir_mode_storage(type);
2146
2147                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2148                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2149
2150                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2151                 set_value(var2->variable.v.value_number, res);
2152
2153                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2154                 set_value(var->variable.v.value_number, res);
2155
2156                 return res;
2157         }
2158
2159         expression_t *con = NULL;
2160         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2161                 var = op1->reference.entity;
2162                 con = op2;
2163         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2164                 relation = get_inversed_relation(relation);
2165                 var = op2->reference.entity;
2166                 con = op1;
2167         }
2168
2169         if (var != NULL) {
2170                 type_t  *const type = skip_typeref(var->declaration.type);
2171                 ir_mode *const mode = get_ir_mode_storage(type);
2172
2173                 res = get_value(var->variable.v.value_number, mode);
2174                 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2175                 set_value(var->variable.v.value_number, res);
2176         }
2177         return res;
2178 }
2179
2180 /**
2181  * Handle the assume optimizer hint.
2182  *
2183  * @param dbi    debug info
2184  * @param expr   the IL assume expression
2185  */
2186 static ir_node *handle_assume(expression_t const *const expr)
2187 {
2188         switch (expr->kind) {
2189         case EXPR_BINARY_EQUAL:
2190         case EXPR_BINARY_NOTEQUAL:
2191         case EXPR_BINARY_LESS:
2192         case EXPR_BINARY_LESSEQUAL:
2193         case EXPR_BINARY_GREATER:
2194         case EXPR_BINARY_GREATEREQUAL: {
2195                 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2196                 return handle_assume_compare(dbgi, &expr->binary);
2197         }
2198
2199         default:
2200                 return NULL;
2201         }
2202 }
2203
2204 static ir_node *create_cast(unary_expression_t const *const expr)
2205 {
2206         type_t *const type = skip_typeref(expr->base.type);
2207         if (is_type_void(type))
2208                 return NULL;
2209
2210         type_t  *const from_type = skip_typeref(expr->value->base.type);
2211         ir_node       *value     = is_type_complex(from_type)
2212                 ? expression_to_complex(expr->value).real
2213                 : expression_to_value(expr->value);
2214
2215         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2216         ir_mode  *const mode = get_ir_mode_storage(type);
2217         /* check for conversion from / to __based types */
2218         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2219                 const variable_t *from_var = from_type->pointer.base_variable;
2220                 const variable_t *to_var   = type->pointer.base_variable;
2221                 if (from_var != to_var) {
2222                         if (from_var != NULL) {
2223                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2224                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2225                                 value = new_d_Add(dbgi, value, base, mode);
2226                         }
2227                         if (to_var != NULL) {
2228                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2229                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2230                                 value = new_d_Sub(dbgi, value, base, mode);
2231                         }
2232                 }
2233         }
2234
2235         return create_conv(dbgi, value, mode);
2236 }
2237
2238 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2239 {
2240         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2241         type_t   *const type  = skip_typeref(expr->base.type);
2242         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2243         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2244         return new_d_Not(dbgi, value, mode);
2245 }
2246
2247 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2248 {
2249         dbg_info *const dbgi       = get_dbg_info(&expr->base.pos);
2250         ir_node        *value      = expression_to_value(expr->value);
2251         type_t   *const value_type = skip_typeref(expr->value->base.type);
2252         assert(is_type_pointer(value_type));
2253
2254         /* check for __based */
2255         variable_t const *const base_var = value_type->pointer.base_variable;
2256         if (base_var) {
2257                 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2258                 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2259                 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2260         }
2261         type_t *const points_to = value_type->pointer.points_to;
2262         return deref_address(dbgi, points_to, value);
2263 }
2264
2265 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2266 {
2267         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2268         type_t   *const type  = skip_typeref(expr->base.type);
2269         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2270         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2271         return new_d_Minus(dbgi, value, mode);
2272 }
2273
2274 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2275                 ir_node *value, type_t *type)
2276 {
2277         ir_mode        *const mode         = get_ir_mode_storage(type_ptrdiff_t);
2278         assert(is_type_pointer(type));
2279         pointer_type_t *const pointer_type = &type->pointer;
2280         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2281         ir_node        *      elem_size    = get_type_size_node(points_to);
2282         elem_size                          = create_conv(dbgi, elem_size, mode);
2283         value                              = create_conv(dbgi, value,     mode);
2284         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2285         return mul;
2286 }
2287
2288 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2289                            ir_mode *mode)
2290 {
2291         ir_node *pin = new_Pin(new_NoMem());
2292         ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2293                                  op_pin_state_floats);
2294         return new_d_Proj(dbgi, op, mode, pn_Div_res);
2295 }
2296
2297 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2298 {
2299         ir_mode                *mode;
2300         dbg_info         *const dbgi       = get_dbg_info(&expr->base.pos);
2301         type_t           *const type_left  = skip_typeref(expr->left->base.type);
2302         type_t           *const type_right = skip_typeref(expr->right->base.type);
2303         expression_kind_t const kind       = expr->base.kind;
2304         switch (kind) {
2305         case EXPR_BINARY_SHIFTLEFT:
2306         case EXPR_BINARY_SHIFTRIGHT:
2307         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2308         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2309                 mode  = get_ir_mode_arithmetic(expr->base.type);
2310                 left  = create_conv(dbgi, left,  mode);
2311                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2312                 break;
2313
2314         case EXPR_BINARY_SUB:
2315                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2316                         const pointer_type_t *const ptr_type = &type_left->pointer;
2317
2318                         mode = get_ir_mode_storage(expr->base.type);
2319                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2320                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2321                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2322                         ir_node *const no_mem    = new_NoMem();
2323                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2324                                                                                                    mode, op_pin_state_floats);
2325                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2326                 }
2327                 /* fallthrough */
2328         case EXPR_BINARY_SUB_ASSIGN:
2329                 if (is_type_pointer(type_left)) {
2330                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2331                         mode  = get_ir_mode_storage(type_left);
2332                         break;
2333                 }
2334                 goto normal_node;
2335
2336         case EXPR_BINARY_ADD:
2337         case EXPR_BINARY_ADD_ASSIGN:
2338                 if (is_type_pointer(type_left)) {
2339                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2340                         mode  = get_ir_mode_storage(type_left);
2341                         break;
2342                 } else if (is_type_pointer(type_right)) {
2343                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2344                         mode  = get_ir_mode_storage(type_right);
2345                         break;
2346                 }
2347                 goto normal_node;
2348
2349         default:
2350 normal_node:
2351                 mode  = get_ir_mode_arithmetic(type_right);
2352                 left  = create_conv(dbgi, left,  mode);
2353                 right = create_conv(dbgi, right, mode);
2354                 break;
2355         }
2356
2357         switch (kind) {
2358         case EXPR_BINARY_ADD_ASSIGN:
2359         case EXPR_BINARY_ADD:
2360                 return new_d_Add(dbgi, left, right, mode);
2361         case EXPR_BINARY_SUB_ASSIGN:
2362         case EXPR_BINARY_SUB:
2363                 return new_d_Sub(dbgi, left, right, mode);
2364         case EXPR_BINARY_MUL_ASSIGN:
2365         case EXPR_BINARY_MUL:
2366                 return new_d_Mul(dbgi, left, right, mode);
2367         case EXPR_BINARY_DIV:
2368         case EXPR_BINARY_DIV_ASSIGN:
2369                 return create_div(dbgi, left, right, mode);
2370         case EXPR_BINARY_BITWISE_AND:
2371         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2372                 return new_d_And(dbgi, left, right, mode);
2373         case EXPR_BINARY_BITWISE_OR:
2374         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2375                 return new_d_Or(dbgi, left, right, mode);
2376         case EXPR_BINARY_BITWISE_XOR:
2377         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2378                 return new_d_Eor(dbgi, left, right, mode);
2379         case EXPR_BINARY_SHIFTLEFT:
2380         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2381                 return new_d_Shl(dbgi, left, right, mode);
2382         case EXPR_BINARY_SHIFTRIGHT:
2383         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2384                 if (mode_is_signed(mode)) {
2385                         return new_d_Shrs(dbgi, left, right, mode);
2386                 } else {
2387                         return new_d_Shr(dbgi, left, right, mode);
2388                 }
2389         case EXPR_BINARY_MOD:
2390         case EXPR_BINARY_MOD_ASSIGN: {
2391                 ir_node *pin = new_Pin(new_NoMem());
2392                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2393                                          op_pin_state_floats);
2394                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2395                 return res;
2396         }
2397         default:
2398                 panic("unexpected expression kind");
2399         }
2400 }
2401
2402 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2403 {
2404         ir_node *const left  = expression_to_value(expr->left);
2405         ir_node *const right = expression_to_value(expr->right);
2406         return create_op(expr, left, right);
2407 }
2408
2409 /**
2410  * Check if a given expression is a GNU __builtin_expect() call.
2411  */
2412 static bool is_builtin_expect(const expression_t *expression)
2413 {
2414         if (expression->kind != EXPR_CALL)
2415                 return false;
2416
2417         expression_t *function = expression->call.function;
2418         if (function->kind != EXPR_REFERENCE)
2419                 return false;
2420         reference_expression_t *ref = &function->reference;
2421         if (ref->entity->kind         != ENTITY_FUNCTION ||
2422             ref->entity->function.btk != BUILTIN_EXPECT)
2423                 return false;
2424
2425         return true;
2426 }
2427
2428 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)
2429 {
2430         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2431         ir_node  *const cmp  = new_d_Cmp(dbgi, left, right, relation);
2432         if (is_Const(cmp)) {
2433                 if (tarval_is_null(get_Const_tarval(cmp))) {
2434                         jump_to_target(false_target);
2435                 } else {
2436                         jump_to_target(true_target);
2437                 }
2438         } else {
2439                 ir_node *const cond       = new_d_Cond(dbgi, cmp);
2440                 ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2441                 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2442
2443                 /* set branch prediction info based on __builtin_expect */
2444                 if (is_builtin_expect(expr) && is_Cond(cond)) {
2445                         call_argument_t *const argument = expr->call.arguments->next;
2446                         if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
2447                                 bool               const cnst = fold_constant_to_bool(argument->expression);
2448                                 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2449                                 set_Cond_jmp_pred(cond, pred);
2450                         }
2451                 }
2452
2453                 add_pred_to_jump_target(true_target,  true_proj);
2454                 add_pred_to_jump_target(false_target, false_proj);
2455         }
2456         set_unreachable_now();
2457 }
2458
2459 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2460 {
2461         ir_node        *val  = NULL;
2462         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2463         ir_mode  *const mode = get_ir_mode_storage(expr->base.type);
2464         jump_target     exit_target;
2465         init_jump_target(&exit_target, NULL);
2466
2467         if (enter_jump_target(true_target)) {
2468                 jump_to_target(&exit_target);
2469                 val = new_d_Const(dbgi, get_mode_one(mode));
2470         }
2471
2472         if (enter_jump_target(false_target)) {
2473                 jump_to_target(&exit_target);
2474                 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2475                 if (val) {
2476                         ir_node *const in[] = { val, zero };
2477                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2478                 } else {
2479                         val = zero;
2480                 }
2481         }
2482
2483         if (!enter_jump_target(&exit_target)) {
2484                 set_cur_block(new_Block(0, NULL));
2485                 val = new_d_Bad(dbgi, mode);
2486         }
2487         return val;
2488 }
2489
2490 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2491 {
2492         ir_node            *const right     = expression_to_value(expr->right);
2493         expression_t const *const left_expr = expr->left;
2494         ir_node            *const addr      = expression_to_addr(left_expr);
2495         ir_node            *const left      = get_value_from_lvalue(left_expr, addr);
2496         ir_node                  *result    = create_op(expr, left, right);
2497
2498         type_t *const type = skip_typeref(expr->base.type);
2499         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2500                 jump_target true_target;
2501                 jump_target false_target;
2502                 init_jump_target(&true_target,  NULL);
2503                 init_jump_target(&false_target, NULL);
2504                 ir_mode *const mode = get_irn_mode(result);
2505                 ir_node *const zero = new_Const(get_mode_null(mode));
2506                 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2507                 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2508         }
2509
2510         return set_value_for_expression_addr(left_expr, result, addr);
2511 }
2512
2513 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2514 {
2515         ir_node *const addr  = expression_to_addr(expr->left);
2516         ir_node *const right = expression_to_value(expr->right);
2517         return set_value_for_expression_addr(expr->left, right, addr);
2518 }
2519
2520 /** evaluate an expression and discard the result, but still produce the
2521  * side-effects. */
2522 static void evaluate_expression_discard_result(const expression_t *expression)
2523 {
2524         type_t *type = skip_typeref(expression->base.type);
2525         if (is_type_complex(type)) {
2526                 expression_to_complex(expression);
2527         } else {
2528                 expression_to_value(expression);
2529         }
2530 }
2531
2532 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2533 {
2534         evaluate_expression_discard_result(expr->left);
2535         return expression_to_value(expr->right);
2536 }
2537
2538 static ir_node *array_access_addr(const array_access_expression_t *expression)
2539 {
2540         dbg_info *dbgi        = get_dbg_info(&expression->base.pos);
2541         ir_node  *base_addr   = expression_to_value(expression->array_ref);
2542         ir_node  *offset      = expression_to_value(expression->index);
2543         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2544         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2545         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2546
2547         return result;
2548 }
2549
2550 static ir_node *array_access_to_firm(
2551                 const array_access_expression_t *expression)
2552 {
2553         dbg_info *dbgi   = get_dbg_info(&expression->base.pos);
2554         ir_node  *addr   = array_access_addr(expression);
2555         type_t   *type   = revert_automatic_type_conversion(
2556                         (const expression_t*) expression);
2557         type             = skip_typeref(type);
2558
2559         return deref_address(dbgi, type, addr);
2560 }
2561
2562 static long get_offsetof_offset(const offsetof_expression_t *expression)
2563 {
2564         type_t *orig_type = expression->type;
2565         long    offset    = 0;
2566
2567         designator_t *designator = expression->designator;
2568         for ( ; designator != NULL; designator = designator->next) {
2569                 type_t *type = skip_typeref(orig_type);
2570                 /* be sure the type is constructed */
2571                 (void) get_ir_type(type);
2572
2573                 if (designator->symbol != NULL) {
2574                         assert(is_type_compound(type));
2575                         symbol_t *symbol = designator->symbol;
2576
2577                         compound_t *compound = type->compound.compound;
2578                         entity_t   *iter     = compound->members.entities;
2579                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2580
2581                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2582                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2583                         offset += get_entity_offset(iter->compound_member.entity);
2584
2585                         orig_type = iter->declaration.type;
2586                 } else {
2587                         expression_t *array_index = designator->array_index;
2588                         assert(designator->array_index != NULL);
2589                         assert(is_type_array(type));
2590
2591                         long index         = fold_constant_to_int(array_index);
2592                         ir_type *arr_type  = get_ir_type(type);
2593                         ir_type *elem_type = get_array_element_type(arr_type);
2594                         long     elem_size = get_type_size_bytes(elem_type);
2595
2596                         offset += index * elem_size;
2597
2598                         orig_type = type->array.element_type;
2599                 }
2600         }
2601
2602         return offset;
2603 }
2604
2605 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2606 {
2607         ir_mode   *mode   = get_ir_mode_storage(expression->base.type);
2608         long       offset = get_offsetof_offset(expression);
2609         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2610         dbg_info  *dbgi   = get_dbg_info(&expression->base.pos);
2611
2612         return new_d_Const(dbgi, tv);
2613 }
2614
2615 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2616                                      ir_entity *entity, type_t *type);
2617 static ir_initializer_t *create_ir_initializer(
2618                 const initializer_t *initializer, type_t *type);
2619
2620 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2621                                             initializer_t *initializer,
2622                                             type_t *type)
2623 {
2624         /* create the ir_initializer */
2625         PUSH_IRG(get_const_code_irg());
2626         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2627         POP_IRG();
2628
2629         ident     *const id          = id_unique("initializer.%u");
2630         ir_type   *const irtype      = get_ir_type(type);
2631         ir_type   *const global_type = get_glob_type();
2632         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2633         set_entity_ld_ident(entity, id);
2634         set_entity_visibility(entity, ir_visibility_private);
2635         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2636         set_entity_initializer(entity, irinitializer);
2637         return entity;
2638 }
2639
2640 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2641 {
2642         dbg_info      *dbgi        = get_dbg_info(&expression->base.pos);
2643         type_t        *type        = expression->type;
2644         initializer_t *initializer = expression->initializer;
2645
2646         if (expression->global_scope ||
2647                 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2648             && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2649                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2650                 return create_symconst(dbgi, entity);
2651         } else {
2652                 /* create an entity on the stack */
2653                 ident   *const id     = id_unique("CompLit.%u");
2654                 ir_type *const irtype = get_ir_type(type);
2655                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2656
2657                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2658                 set_entity_ld_ident(entity, id);
2659
2660                 /* create initialisation code */
2661                 create_local_initializer(initializer, dbgi, entity, type);
2662
2663                 /* create a sel for the compound literal address */
2664                 ir_node *frame = get_irg_frame(current_ir_graph);
2665                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2666                 return sel;
2667         }
2668 }
2669
2670 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2671 {
2672         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2673         type_t   *const type = expr->type;
2674         ir_node  *const addr = compound_literal_addr(expr);
2675         return deref_address(dbgi, type, addr);
2676 }
2677
2678 /**
2679  * Transform a sizeof expression into Firm code.
2680  */
2681 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2682 {
2683         type_t *const type = skip_typeref(expression->type);
2684         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2685         if (is_type_array(type) && type->array.is_vla
2686                         && expression->tp_expression != NULL) {
2687                 expression_to_value(expression->tp_expression);
2688         }
2689
2690         return get_type_size_node(type);
2691 }
2692
2693 static entity_t *get_expression_entity(const expression_t *expression)
2694 {
2695         if (expression->kind != EXPR_REFERENCE)
2696                 return NULL;
2697
2698         return expression->reference.entity;
2699 }
2700
2701 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2702 {
2703         switch (entity->kind) {
2704         case DECLARATION_KIND_CASES:
2705                 return entity->declaration.alignment;
2706         case ENTITY_STRUCT:
2707         case ENTITY_UNION:
2708                 return entity->compound.alignment;
2709         case ENTITY_TYPEDEF:
2710                 return entity->typedefe.alignment;
2711         default:
2712                 break;
2713         }
2714         return 0;
2715 }
2716
2717 /**
2718  * Transform an alignof expression into Firm code.
2719  */
2720 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2721 {
2722         unsigned alignment = 0;
2723
2724         const expression_t *tp_expression = expression->tp_expression;
2725         if (tp_expression != NULL) {
2726                 entity_t *entity = get_expression_entity(tp_expression);
2727                 if (entity != NULL) {
2728                         alignment = get_cparser_entity_alignment(entity);
2729                 }
2730         }
2731
2732         if (alignment == 0) {
2733                 type_t *type = expression->type;
2734                 alignment = get_type_alignment(type);
2735         }
2736
2737         dbg_info  *dbgi = get_dbg_info(&expression->base.pos);
2738         ir_mode   *mode = get_ir_mode_storage(expression->base.type);
2739         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2740         return new_d_Const(dbgi, tv);
2741 }
2742
2743 static void init_ir_types(void);
2744
2745 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2746 {
2747         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2748
2749         bool constant_folding_old = constant_folding;
2750         constant_folding = true;
2751         int old_optimize         = get_optimize();
2752         int old_constant_folding = get_opt_constant_folding();
2753         set_optimize(1);
2754         set_opt_constant_folding(1);
2755
2756         init_ir_types();
2757
2758         PUSH_IRG(get_const_code_irg());
2759         ir_node *const cnst = expression_to_value(expression);
2760         POP_IRG();
2761
2762         set_optimize(old_optimize);
2763         set_opt_constant_folding(old_constant_folding);
2764         constant_folding = constant_folding_old;
2765
2766         if (!is_Const(cnst))
2767                 panic("couldn't fold constant");
2768         return get_Const_tarval(cnst);
2769 }
2770
2771 static complex_constant fold_complex_constant(const expression_t *expression)
2772 {
2773         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2774
2775         bool constant_folding_old = constant_folding;
2776         constant_folding = true;
2777         int old_optimize         = get_optimize();
2778         int old_constant_folding = get_opt_constant_folding();
2779         set_optimize(1);
2780         set_opt_constant_folding(1);
2781
2782         init_ir_types();
2783
2784         PUSH_IRG(get_const_code_irg());
2785         complex_value value = expression_to_complex(expression);
2786         POP_IRG();
2787
2788         set_optimize(old_optimize);
2789         set_opt_constant_folding(old_constant_folding);
2790
2791         if (!is_Const(value.real) || !is_Const(value.imag)) {
2792                 panic("couldn't fold constant");
2793         }
2794
2795         constant_folding = constant_folding_old;
2796
2797         return (complex_constant) {
2798                 get_Const_tarval(value.real),
2799                 get_Const_tarval(value.imag)
2800         };
2801 }
2802
2803 /* this function is only used in parser.c, but it relies on libfirm functionality */
2804 bool constant_is_negative(const expression_t *expression)
2805 {
2806         ir_tarval *tv = fold_constant_to_tarval(expression);
2807         return tarval_is_negative(tv);
2808 }
2809
2810 long fold_constant_to_int(const expression_t *expression)
2811 {
2812         ir_tarval *tv = fold_constant_to_tarval(expression);
2813         if (!tarval_is_long(tv)) {
2814                 panic("result of constant folding is not integer");
2815         }
2816
2817         return get_tarval_long(tv);
2818 }
2819
2820 bool fold_constant_to_bool(const expression_t *expression)
2821 {
2822         type_t *type = skip_typeref(expression->base.type);
2823         if (is_type_complex(type)) {
2824                 complex_constant tvs = fold_complex_constant(expression);
2825                 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2826         } else {
2827                 ir_tarval *tv = fold_constant_to_tarval(expression);
2828                 return !tarval_is_null(tv);
2829         }
2830 }
2831
2832 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2833 {
2834         jump_target true_target;
2835         jump_target false_target;
2836         init_jump_target(&true_target,  NULL);
2837         init_jump_target(&false_target, NULL);
2838         ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2839
2840         ir_node        *val  = NULL;
2841         dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2842         type_t   *const type = skip_typeref(expression->base.type);
2843         ir_mode  *const mode = get_ir_mode_arithmetic(type);
2844         jump_target exit_target;
2845         init_jump_target(&exit_target, NULL);
2846
2847         if (enter_jump_target(&true_target)) {
2848                 if (expression->true_expression) {
2849                         val = expression_to_value(expression->true_expression);
2850                 } else if (cond_expr) {
2851                         val = cond_expr;
2852                 } else {
2853                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2854                          * comparison.  Generate a "1" as value for the true branch. */
2855                         val = new_Const(get_mode_one(mode));
2856                 }
2857                 if (val)
2858                         val = create_conv(dbgi, val, mode);
2859                 jump_to_target(&exit_target);
2860         }
2861
2862         if (enter_jump_target(&false_target)) {
2863                 ir_node *false_val = expression_to_value(expression->false_expression);
2864                 if (false_val)
2865                         false_val = create_conv(dbgi, false_val, mode);
2866                 jump_to_target(&exit_target);
2867                 if (val) {
2868                         ir_node *const in[] = { val, false_val };
2869                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2870                 } else {
2871                         val = false_val;
2872                 }
2873         }
2874
2875         if (!enter_jump_target(&exit_target)) {
2876                 set_cur_block(new_Block(0, NULL));
2877                 if (!is_type_void(type))
2878                         val = new_Bad(mode);
2879         }
2880         return val;
2881 }
2882
2883 /**
2884  * Returns an IR-node representing the address of a field.
2885  */
2886 static ir_node *select_addr(const select_expression_t *expression)
2887 {
2888         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2889
2890         construct_select_compound(expression);
2891
2892         ir_node *compound_addr = expression_to_value(expression->compound);
2893
2894         entity_t *entry = expression->compound_entry;
2895         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2896         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2897
2898         if (constant_folding) {
2899                 ir_mode *mode      = get_irn_mode(compound_addr);
2900                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2901                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2902                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2903         } else {
2904                 ir_entity *irentity = entry->compound_member.entity;
2905                 assert(irentity != NULL);
2906                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2907         }
2908 }
2909
2910 static ir_node *select_to_firm(const select_expression_t *expression)
2911 {
2912         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2913         ir_node  *addr = select_addr(expression);
2914         type_t   *type = revert_automatic_type_conversion(
2915                         (const expression_t*) expression);
2916         type           = skip_typeref(type);
2917
2918         entity_t *entry = expression->compound_entry;
2919         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2920
2921         if (entry->compound_member.bitfield) {
2922                 return bitfield_extract_to_firm(expression, addr);
2923         }
2924
2925         return deref_address(dbgi, type, addr);
2926 }
2927
2928 /* Values returned by __builtin_classify_type. */
2929 typedef enum gcc_type_class
2930 {
2931         no_type_class = -1,
2932         void_type_class,
2933         integer_type_class,
2934         char_type_class,
2935         enumeral_type_class,
2936         boolean_type_class,
2937         pointer_type_class,
2938         reference_type_class,
2939         offset_type_class,
2940         real_type_class,
2941         complex_type_class,
2942         function_type_class,
2943         method_type_class,
2944         record_type_class,
2945         union_type_class,
2946         array_type_class,
2947         string_type_class,
2948         set_type_class,
2949         file_type_class,
2950         lang_type_class
2951 } gcc_type_class;
2952
2953 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2954 {
2955         type_t *type = expr->type_expression->base.type;
2956
2957         /* FIXME gcc returns different values depending on whether compiling C or C++
2958          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2959         gcc_type_class tc;
2960         for (;;) {
2961                 type = skip_typeref(type);
2962                 switch (type->kind) {
2963                         case TYPE_ATOMIC: {
2964                                 const atomic_type_t *const atomic_type = &type->atomic;
2965                                 switch (atomic_type->akind) {
2966                                         /* gcc cannot do that */
2967                                         case ATOMIC_TYPE_VOID:
2968                                                 tc = void_type_class;
2969                                                 goto make_const;
2970
2971                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2972                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2973                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2974                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2975                                         case ATOMIC_TYPE_SHORT:
2976                                         case ATOMIC_TYPE_USHORT:
2977                                         case ATOMIC_TYPE_INT:
2978                                         case ATOMIC_TYPE_UINT:
2979                                         case ATOMIC_TYPE_LONG:
2980                                         case ATOMIC_TYPE_ULONG:
2981                                         case ATOMIC_TYPE_LONGLONG:
2982                                         case ATOMIC_TYPE_ULONGLONG:
2983                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2984                                                 tc = integer_type_class;
2985                                                 goto make_const;
2986
2987                                         case ATOMIC_TYPE_FLOAT:
2988                                         case ATOMIC_TYPE_DOUBLE:
2989                                         case ATOMIC_TYPE_LONG_DOUBLE:
2990                                                 tc = real_type_class;
2991                                                 goto make_const;
2992                                 }
2993                                 panic("Unexpected atomic type.");
2994                         }
2995
2996                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2997                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2998                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2999                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3000                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3001                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3002                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3003
3004                         /* gcc handles this as integer */
3005                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3006
3007                         /* gcc classifies the referenced type */
3008                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3009
3010                         /* typedef/typeof should be skipped already */
3011                         case TYPE_TYPEDEF:
3012                         case TYPE_TYPEOF:
3013                         case TYPE_ERROR:
3014                                 break;
3015                 }
3016                 panic("unexpected type.");
3017         }
3018
3019 make_const:;
3020         dbg_info  *const dbgi = get_dbg_info(&expr->base.pos);
3021         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3022         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3023         return new_d_Const(dbgi, tv);
3024 }
3025
3026 static ir_node *function_name_to_firm(
3027                 const funcname_expression_t *const expr)
3028 {
3029         switch (expr->kind) {
3030         case FUNCNAME_FUNCTION:
3031         case FUNCNAME_PRETTY_FUNCTION:
3032         case FUNCNAME_FUNCDNAME:
3033                 if (current_function_name == NULL) {
3034                         position_t const *const src_pos = &expr->base.pos;
3035                         char       const *const name    = current_function_entity->base.symbol->string;
3036                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3037                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3038                 }
3039                 return current_function_name;
3040         case FUNCNAME_FUNCSIG:
3041                 if (current_funcsig == NULL) {
3042                         position_t const *const src_pos = &expr->base.pos;
3043                         ir_entity        *const ent     = get_irg_entity(current_ir_graph);
3044                         char       const *const name    = get_entity_ld_name(ent);
3045                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3046                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3047                 }
3048                 return current_funcsig;
3049         }
3050         panic("Unsupported function name");
3051 }
3052
3053 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3054 {
3055         statement_t *statement = expr->statement;
3056
3057         assert(statement->kind == STATEMENT_COMPOUND);
3058         return compound_statement_to_firm(&statement->compound);
3059 }
3060
3061 static ir_node *va_start_expression_to_firm(
3062         const va_start_expression_t *const expr)
3063 {
3064         ir_entity *param_ent = current_vararg_entity;
3065         if (param_ent == NULL) {
3066                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3067                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3068                 ir_type *const param_type  = get_unknown_type();
3069                 param_ent = new_parameter_entity(frame_type, n, param_type);
3070                 current_vararg_entity = param_ent;
3071         }
3072
3073         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3074         dbg_info *const dbgi    = get_dbg_info(&expr->base.pos);
3075         ir_node  *const no_mem  = new_NoMem();
3076         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3077
3078         set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3079
3080         return NULL;
3081 }
3082
3083 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3084 {
3085         type_t       *const type    = expr->base.type;
3086         expression_t *const ap_expr = expr->ap;
3087         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3088         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3089         dbg_info     *const dbgi    = get_dbg_info(&expr->base.pos);
3090         ir_node      *const res     = deref_address(dbgi, type, ap);
3091
3092         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3093         ir_mode      *const mode    = get_irn_mode(cnst);
3094         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3095         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3096         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3097         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3098         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3099
3100         set_value_for_expression_addr(ap_expr, add, ap_addr);
3101
3102         return res;
3103 }
3104
3105 /**
3106  * Generate Firm for a va_copy expression.
3107  */
3108 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3109 {
3110         ir_node *const src = expression_to_value(expr->src);
3111         set_value_for_expression_addr(expr->dst, src, NULL);
3112         return NULL;
3113 }
3114
3115 static ir_node *dereference_addr(const unary_expression_t *const expression)
3116 {
3117         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3118         return expression_to_value(expression->value);
3119 }
3120
3121 /**
3122  * Returns a IR-node representing an lvalue of the given expression.
3123  */
3124 static ir_node *expression_to_addr(const expression_t *expression)
3125 {
3126         switch (expression->kind) {
3127         case EXPR_ARRAY_ACCESS:
3128                 return array_access_addr(&expression->array_access);
3129         case EXPR_COMPOUND_LITERAL:
3130                 return compound_literal_addr(&expression->compound_literal);
3131         case EXPR_REFERENCE:
3132                 return reference_addr(&expression->reference);
3133         case EXPR_SELECT:
3134                 return select_addr(&expression->select);
3135         case EXPR_UNARY_DEREFERENCE:
3136                 return dereference_addr(&expression->unary);
3137         default:
3138                 break;
3139         }
3140         panic("trying to get address of non-lvalue");
3141 }
3142
3143 static ir_node *builtin_constant_to_firm(
3144                 const builtin_constant_expression_t *expression)
3145 {
3146         ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3147         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3148         return create_Const_from_bool(mode, v);
3149 }
3150
3151 static ir_node *builtin_types_compatible_to_firm(
3152                 const builtin_types_compatible_expression_t *expression)
3153 {
3154         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3155         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3156         bool     const value = types_compatible(left, right);
3157         ir_mode *const mode  = get_ir_mode_storage(expression->base.type);
3158         return create_Const_from_bool(mode, value);
3159 }
3160
3161 static void prepare_label_target(label_t *const label)
3162 {
3163         if (label->address_taken && !label->indirect_block) {
3164                 ir_node *const iblock = new_immBlock();
3165                 label->indirect_block = iblock;
3166                 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3167                 jump_from_block_to_target(&label->target, iblock);
3168         }
3169 }
3170
3171 /**
3172  * Pointer to a label.  This is used for the
3173  * GNU address-of-label extension.
3174  */
3175 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3176 {
3177         /* Beware: Might be called from create initializer with current_ir_graph
3178          * set to const_code_irg. */
3179         PUSH_IRG(current_function);
3180         prepare_label_target(label->label);
3181         POP_IRG();
3182
3183         symconst_symbol value;
3184         value.entity_p = create_Block_entity(label->label->indirect_block);
3185         dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3186         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3187 }
3188
3189 static ir_node *expression_to_value(expression_t const *const expr)
3190 {
3191 #ifndef NDEBUG
3192         if (!constant_folding) {
3193                 assert(!expr->base.transformed);
3194                 ((expression_t*)expr)->base.transformed = true;
3195         }
3196         assert(!is_type_complex(skip_typeref(expr->base.type)));
3197 #endif
3198
3199         switch (expr->kind) {
3200         case EXPR_UNARY_CAST:
3201                 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3202         case EXPR_BINARY_EQUAL:
3203         case EXPR_BINARY_GREATER:
3204         case EXPR_BINARY_GREATEREQUAL:
3205         case EXPR_BINARY_ISGREATER:
3206         case EXPR_BINARY_ISGREATEREQUAL:
3207         case EXPR_BINARY_ISLESS:
3208         case EXPR_BINARY_ISLESSEQUAL:
3209         case EXPR_BINARY_ISLESSGREATER:
3210         case EXPR_BINARY_ISUNORDERED:
3211         case EXPR_BINARY_LESS:
3212         case EXPR_BINARY_LESSEQUAL:
3213         case EXPR_BINARY_LOGICAL_AND:
3214         case EXPR_BINARY_LOGICAL_OR:
3215         case EXPR_BINARY_NOTEQUAL:
3216         case EXPR_UNARY_NOT:;
3217                         jump_target true_target;
3218                         jump_target false_target;
3219                         init_jump_target(&true_target,  NULL);
3220                         init_jump_target(&false_target, NULL);
3221                         expression_to_control_flow(expr, &true_target, &false_target);
3222                         return control_flow_to_1_0(expr, &true_target, &false_target);
3223                 } else {
3224                         return create_cast(&expr->unary);
3225                 }
3226
3227         case EXPR_BINARY_ADD:
3228         case EXPR_BINARY_BITWISE_AND:
3229         case EXPR_BINARY_BITWISE_OR:
3230         case EXPR_BINARY_BITWISE_XOR:
3231         case EXPR_BINARY_DIV:
3232         case EXPR_BINARY_MOD:
3233         case EXPR_BINARY_MUL:
3234         case EXPR_BINARY_SHIFTLEFT:
3235         case EXPR_BINARY_SHIFTRIGHT:
3236         case EXPR_BINARY_SUB:
3237                 return binop_to_firm(&expr->binary);
3238
3239         case EXPR_BINARY_ADD_ASSIGN:
3240         case EXPR_BINARY_BITWISE_AND_ASSIGN:
3241         case EXPR_BINARY_BITWISE_OR_ASSIGN:
3242         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3243         case EXPR_BINARY_DIV_ASSIGN:
3244         case EXPR_BINARY_MOD_ASSIGN:
3245         case EXPR_BINARY_MUL_ASSIGN:
3246         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3247         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3248         case EXPR_BINARY_SUB_ASSIGN:
3249                 return binop_assign_to_firm(&expr->binary);
3250
3251         {
3252                 bool inc;
3253                 bool pre;
3254         case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3255         case EXPR_UNARY_POSTFIX_INCREMENT: inc = true;  pre = false; goto incdec;
3256         case EXPR_UNARY_PREFIX_DECREMENT:  inc = false; pre = true;  goto incdec;
3257         case EXPR_UNARY_PREFIX_INCREMENT:  inc = true;  pre = true;  goto incdec;
3258 incdec:
3259                 return incdec_to_firm(&expr->unary, inc, pre);
3260         }
3261
3262         case EXPR_UNARY_IMAG: {
3263                 complex_value irvalue = expression_to_complex(expr->unary.value);
3264                 return irvalue.imag;
3265         }
3266         case EXPR_UNARY_REAL: {
3267                 complex_value irvalue = expression_to_complex(expr->unary.value);
3268                 return irvalue.real;
3269         }
3270
3271         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3272         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3273         case EXPR_BINARY_ASSIGN:              return assign_expression_to_firm(       &expr->binary);
3274         case EXPR_BINARY_COMMA:               return comma_expression_to_firm(        &expr->binary);
3275         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3276         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3277         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3278         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3279         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3280         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3281         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3282         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3283         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3284         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3285         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3286         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3287         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3288         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3289         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3290         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3291         case EXPR_STRING_LITERAL:             return string_to_firm(                  &expr->base.pos, "str.%u", &expr->string_literal.value);
3292         case EXPR_UNARY_ASSUME:               return handle_assume(                    expr->unary.value);
3293         case EXPR_UNARY_COMPLEMENT:           return complement_to_firm(              &expr->unary);
3294         case EXPR_UNARY_DEREFERENCE:          return dereference_to_firm(             &expr->unary);
3295         case EXPR_UNARY_NEGATE:               return negate_to_firm(                  &expr->unary);
3296         case EXPR_UNARY_PLUS:                 return expression_to_value(              expr->unary.value);
3297         case EXPR_UNARY_TAKE_ADDRESS:         return expression_to_addr(               expr->unary.value);
3298         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3299         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3300         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3301
3302         case EXPR_UNARY_DELETE:
3303         case EXPR_UNARY_DELETE_ARRAY:
3304         case EXPR_UNARY_THROW:
3305                 panic("expression not implemented");
3306
3307         case EXPR_ERROR:
3308                 break;
3309         }
3310         panic("invalid expression");
3311 }
3312
3313 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3314         jump_target *const true_target, jump_target *const false_target,
3315         ir_relation relation);
3316
3317 static complex_value complex_to_control_flow(const expression_t *expression,
3318                                              jump_target *true_target,
3319                                              jump_target *false_target);
3320
3321 /**
3322  * create a short-circuit expression evaluation that tries to construct
3323  * efficient control flow structures for &&, || and ! expressions
3324  */
3325 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3326 {
3327         switch (expr->kind) {
3328         case EXPR_UNARY_NOT:
3329                 expression_to_control_flow(expr->unary.value, false_target, true_target);
3330                 return NULL;
3331
3332         case EXPR_BINARY_LOGICAL_AND: {
3333                 jump_target extra_target;
3334                 init_jump_target(&extra_target, NULL);
3335                 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3336                 if (enter_jump_target(&extra_target))
3337                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3338                 return NULL;
3339         }
3340
3341         case EXPR_BINARY_LOGICAL_OR: {
3342                 jump_target extra_target;
3343                 init_jump_target(&extra_target, NULL);
3344                 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3345                 if (enter_jump_target(&extra_target))
3346                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3347                 return NULL;
3348         }
3349
3350         case EXPR_BINARY_COMMA:
3351                 evaluate_expression_discard_result(expr->binary.left);
3352                 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3353
3354         case EXPR_BINARY_EQUAL:
3355         case EXPR_BINARY_GREATER:
3356         case EXPR_BINARY_GREATEREQUAL:
3357         case EXPR_BINARY_ISGREATER:
3358         case EXPR_BINARY_ISGREATEREQUAL:
3359         case EXPR_BINARY_ISLESS:
3360         case EXPR_BINARY_ISLESSEQUAL:
3361         case EXPR_BINARY_ISLESSGREATER:
3362         case EXPR_BINARY_ISUNORDERED:
3363         case EXPR_BINARY_LESS:
3364         case EXPR_BINARY_LESSEQUAL:
3365         case EXPR_BINARY_NOTEQUAL: {
3366                 type_t     *const type     = skip_typeref(expr->binary.left->base.type);
3367                 ir_relation const relation = get_relation(expr->kind);
3368                 if (is_type_complex(type)) {
3369                         complex_equality_evaluation(&expr->binary, true_target,
3370                                                     false_target, relation);
3371                         return NULL;
3372                 }
3373
3374                 dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
3375                 ir_mode  *const mode  = get_ir_mode_arithmetic(type);
3376                 ir_node  *const left  = create_conv(dbgi, expression_to_value(expr->binary.left),  mode);
3377                 ir_node  *const right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3378                 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3379                 return NULL;
3380         }
3381
3382         case EXPR_UNARY_CAST:
3383                 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3384                         expression_to_control_flow(expr->unary.value, true_target, false_target);
3385                         return NULL;
3386                 } else {
3387         default:;
3388                         type_t *const type = skip_typeref(expr->base.type);
3389                         if (is_type_complex(type)) {
3390                                 complex_to_control_flow(expr, true_target, false_target);
3391                                 return NULL;
3392                         }
3393
3394                         dbg_info   *const dbgi  = get_dbg_info(&expr->base.pos);
3395                         ir_mode    *const mode  = get_ir_mode_arithmetic(type);
3396                         ir_node    *const val   = create_conv(dbgi, expression_to_value(expr), mode);
3397                         ir_node    *const left  = val;
3398                         ir_node    *const right = new_Const(get_mode_null(get_irn_mode(val)));
3399                         ir_relation const relation = ir_relation_unordered_less_greater;
3400                         compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3401                         return val;
3402                 }
3403         }
3404 }
3405
3406 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3407                                   ir_mode *mode)
3408 {
3409         return (complex_value) {
3410                 create_conv(dbgi, value.real, mode),
3411                 create_conv(dbgi, value.imag, mode)
3412         };
3413 }
3414
3415 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3416         complex_value const value, type_t *const type)
3417 {
3418         ir_mode *const mode = get_complex_mode_storage(type);
3419         return complex_conv(dbgi, value, mode);
3420 }
3421
3422 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3423                           complex_value value)
3424 {
3425         value = complex_conv_to_storage(dbgi, value, type);
3426         ir_graph  *const irg    = current_ir_graph;
3427         ir_type   *const irtype = get_ir_type(type);
3428         ir_node   *const mem    = get_store();
3429         ir_node   *const nomem  = get_irg_no_mem(irg);
3430         ir_mode   *const mode   = get_complex_mode_storage(type);
3431         ir_node   *const real   = create_conv(dbgi, value.real, mode);
3432         ir_node   *const imag   = create_conv(dbgi, value.imag, mode);
3433         ir_node   *const storer = new_d_Store(dbgi, mem, addr, real, cons_floats);
3434         ir_node   *const memr   = new_Proj(storer, mode_M, pn_Store_M);
3435         ir_mode   *const muint  = atomic_modes[ATOMIC_TYPE_UINT];
3436         ir_node   *const one    = new_Const(get_mode_one(muint));
3437         ir_node   *const in[1]  = { one };
3438         ir_entity *const arrent = get_array_element_entity(irtype);
3439         ir_node   *const addri  = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3440         ir_node   *const storei = new_d_Store(dbgi, memr, addri, imag, cons_floats);
3441         ir_node   *const memi   = new_Proj(storei, mode_M, pn_Store_M);
3442         set_store(memi);
3443 }
3444
3445 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3446                                   complex_value value)
3447 {
3448         ir_graph  *const irg         = current_ir_graph;
3449         ir_type   *const frame_type  = get_irg_frame_type(irg);
3450         ident     *const id          = id_unique("cmplex_tmp.%u");
3451         ir_type   *const irtype      = get_ir_type(type);
3452         ir_entity *const tmp_storage = new_entity(frame_type, id, irtype);
3453         ir_node   *const frame       = get_irg_frame(irg);
3454         ir_node   *const nomem       = get_irg_no_mem(irg);
3455         ir_node   *const addr        = new_simpleSel(nomem, frame, tmp_storage);
3456         set_entity_compiler_generated(tmp_storage, 1);
3457         store_complex(dbgi, addr, type, value);
3458         return addr;
3459 }
3460
3461 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3462 {
3463         assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3464             || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3465         type_t  *const type = skip_typeref(entity->declaration.type);
3466         ir_mode *const mode = get_complex_mode_storage(type);
3467         ir_node *const real = get_value(entity->variable.v.value_number, mode);
3468         ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3469         ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3470         return (complex_value) {
3471                 create_conv(dbgi, real, mode_arithmetic),
3472                 create_conv(dbgi, imag, mode_arithmetic)
3473         };
3474 }
3475
3476 static complex_value complex_deref_address(dbg_info *const dbgi,
3477                                            type_t *type, ir_node *const addr,
3478                                            ir_cons_flags flags)
3479 {
3480         type = skip_typeref(type);
3481         assert(is_type_complex(type));
3482
3483         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3484                 flags |= cons_volatile;
3485         ir_mode   *const mode      = get_complex_mode_storage(type);
3486         ir_node   *const memory    = get_store();
3487         ir_node   *const load      = new_d_Load(dbgi, memory, addr, mode, flags);
3488         ir_node   *const load_mem  = new_Proj(load, mode_M, pn_Load_M);
3489         ir_node   *const load_res  = new_Proj(load, mode,   pn_Load_res);
3490
3491         ir_type   *const irtype    = get_ir_type(type);
3492         ir_mode   *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3493         ir_node   *const in[1]     = { new_Const(get_mode_one(mode_uint)) };
3494         ir_entity *const entity    = get_array_element_entity(irtype);
3495         ir_node   *const nomem     = get_irg_no_mem(current_ir_graph);
3496         ir_node   *const addr2     = new_Sel(nomem, addr, 1, in, entity);
3497         ir_node   *const load2     = new_d_Load(dbgi, load_mem, addr2, mode, flags);
3498         ir_node   *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3499         ir_node   *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3500         set_store(load_mem2);
3501
3502         return (complex_value) { load_res, load_res2 };
3503 }
3504
3505 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3506 {
3507         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
3508         entity_t *const entity = ref->entity;
3509         assert(is_declaration(entity));
3510
3511         switch ((declaration_kind_t)entity->declaration.kind) {
3512         case DECLARATION_KIND_LOCAL_VARIABLE:
3513         case DECLARATION_KIND_PARAMETER:
3514                 return read_localvar_complex(dbgi, entity);
3515         default: {
3516                 ir_node *const addr = reference_addr(ref);
3517                 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3518         }
3519         }
3520 }
3521
3522 static complex_value complex_select_to_firm(const select_expression_t *select)
3523 {
3524         dbg_info *const dbgi = get_dbg_info(&select->base.pos);
3525         ir_node  *const addr = select_addr(select);
3526         type_t   *const type = skip_typeref(select->base.type);
3527         return complex_deref_address(dbgi, type, addr, cons_none);
3528 }
3529
3530 static complex_value complex_array_access_to_firm(
3531         const array_access_expression_t *expression)
3532 {
3533         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3534         ir_node  *addr = array_access_addr(expression);
3535         type_t   *type = skip_typeref(expression->base.type);
3536         assert(is_type_complex(type));
3537         return complex_deref_address(dbgi, type, addr, cons_none);
3538 }
3539
3540 static complex_value get_complex_from_lvalue(const expression_t *expression,
3541                                              ir_node *addr)
3542 {
3543         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3544
3545         if (expression->kind == EXPR_REFERENCE) {
3546                 const reference_expression_t *ref = &expression->reference;
3547
3548                 entity_t *entity = ref->entity;
3549                 assert(entity->kind == ENTITY_VARIABLE
3550                     || entity->kind == ENTITY_PARAMETER);
3551                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3552                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3553                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3554                     return read_localvar_complex(dbgi, entity);
3555                 }
3556         }
3557
3558         assert(addr != NULL);
3559         return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3560 }
3561
3562 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3563 {
3564         const expression_t *const value     = expression->value;
3565         dbg_info           *const dbgi      = get_dbg_info(&expression->base.pos);
3566         type_t             *const from_type = skip_typeref(value->base.type);
3567         type_t             *const to_type   = skip_typeref(expression->base.type);
3568         ir_mode            *const mode      = get_complex_mode_storage(to_type);
3569
3570         if (is_type_complex(from_type)) {
3571                 complex_value cvalue = expression_to_complex(value);
3572                 return complex_conv(dbgi, cvalue, mode);
3573         } else {
3574                 ir_node *const value_node = expression_to_value(value);
3575                 ir_node *const zero       = new_Const(get_mode_null(mode));
3576                 ir_node *const casted     = create_conv(dbgi, value_node, mode);
3577                 return (complex_value) { casted, zero };
3578         }
3579 }
3580
3581 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3582 {
3583         type_t  *type     = skip_typeref(literal->base.type);
3584         ir_mode *mode     = get_complex_mode_storage(type);
3585         ir_node *litvalue = literal_to_firm_(literal, mode);
3586         ir_node *zero     = new_Const(get_mode_null(mode));
3587         return (complex_value) { zero, litvalue };
3588 }
3589
3590 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3591                                            complex_value right, ir_mode *mode);
3592
3593 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3594                                      complex_value right, ir_mode *mode)
3595 {
3596         return (complex_value) {
3597                 new_d_Add(dbgi, left.real, right.real, mode),
3598                 new_d_Add(dbgi, left.imag, right.imag, mode)
3599         };
3600 }
3601
3602 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3603                                      complex_value right, ir_mode *mode)
3604 {
3605         return (complex_value) {
3606                 new_d_Sub(dbgi, left.real, right.real, mode),
3607                 new_d_Sub(dbgi, left.imag, right.imag, mode)
3608         };
3609 }
3610
3611 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3612                                      complex_value right, ir_mode *mode)
3613 {
3614         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3615         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3616         ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3617         ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3618         return (complex_value) {
3619                 new_d_Sub(dbgi, op1, op2, mode),
3620                 new_d_Add(dbgi, op3, op4, mode)
3621         };
3622 }
3623
3624 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3625                                      complex_value right, ir_mode *mode)
3626 {
3627         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3628         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3629         ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3630         ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3631         ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3632         ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3633         ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3634         ir_node *const real_divisor  = new_d_Add(dbgi, op5, op6, mode);
3635         ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3636         ir_node *const imag_divisor  = new_d_Add(dbgi, op5, op6, mode);
3637         return (complex_value) {
3638                 create_div(dbgi, real_dividend, real_divisor, mode),
3639                 create_div(dbgi, imag_dividend, imag_divisor, mode)
3640         };
3641 }
3642
3643 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3644                                           ir_mode *mode);
3645
3646 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3647                                            ir_mode *mode)
3648 {
3649         ir_node *one = new_Const(get_mode_one(mode));
3650         return (complex_value) {
3651                 new_d_Add(dbgi, value.real, one, mode),
3652                 value.imag
3653         };
3654 }
3655
3656 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3657                                            ir_mode *mode)
3658 {
3659         ir_node *one = new_Const(get_mode_one(mode));
3660         return (complex_value) {
3661                 new_d_Sub(dbgi, value.real, one, mode),
3662                 value.imag
3663         };
3664 }
3665
3666 static void set_complex_value_for_expression(dbg_info *dbgi,
3667                                                                                          const expression_t *expression,
3668                                              complex_value value,
3669                                              ir_node *addr)
3670 {
3671         type_t  *const type = skip_typeref(expression->base.type);
3672         ir_mode *const mode = get_complex_mode_storage(type);
3673         ir_node *const real = create_conv(dbgi, value.real, mode);
3674         ir_node *const imag = create_conv(dbgi, value.imag, mode);
3675
3676         if (expression->kind == EXPR_REFERENCE) {
3677                 const reference_expression_t *ref = &expression->reference;
3678
3679                 entity_t *entity = ref->entity;
3680                 assert(is_declaration(entity));
3681                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3682                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3683                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3684                         set_value(entity->variable.v.value_number, real);
3685                         set_value(entity->variable.v.value_number+1, imag);
3686                         return;
3687                 }
3688         }
3689
3690         if (addr == NULL)
3691                 addr = expression_to_addr(expression);
3692         assert(addr != NULL);
3693         store_complex(dbgi, addr, type, value);
3694 }
3695
3696 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3697                                                 new_complex_unop constructor,
3698                                                 bool return_old)
3699 {
3700         dbg_info *const     dbgi       = get_dbg_info(&unop->base.pos);
3701         const expression_t *value_expr = unop->value;
3702         ir_node            *addr       = expression_to_addr(value_expr);
3703         complex_value       value      = get_complex_from_lvalue(value_expr, addr);
3704         type_t             *type       = skip_typeref(unop->base.type);
3705         ir_mode            *mode       = get_complex_mode_arithmetic(type);
3706         value = complex_conv(dbgi, value, mode);
3707         complex_value       new_value  = constructor(dbgi, value, mode);
3708         set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3709         return return_old ? value : new_value;
3710 }
3711
3712 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3713 {
3714         complex_value cvalue = expression_to_complex(expr->value);
3715         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3716         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3717         cvalue = complex_conv(dbgi, cvalue, mode);
3718         return (complex_value) {
3719                 new_d_Minus(dbgi, cvalue.real, mode),
3720                 new_d_Minus(dbgi, cvalue.imag, mode)
3721         };
3722 }
3723
3724 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3725 {
3726         complex_value cvalue = expression_to_complex(expr->value);
3727         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3728         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3729         cvalue = complex_conv(dbgi, cvalue, mode);
3730         return (complex_value) {
3731                 cvalue.real,
3732                 new_d_Minus(dbgi, cvalue.imag, mode)
3733         };
3734 }
3735
3736 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3737                                           new_complex_binop constructor)
3738 {
3739         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3740         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->base.type);
3741         complex_value left  = expression_to_complex(binexpr->left);
3742         complex_value right = expression_to_complex(binexpr->right);
3743         left  = complex_conv(dbgi, left, mode);
3744         right = complex_conv(dbgi, right, mode);
3745         return constructor(dbgi, left, right, mode);
3746 }
3747
3748 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3749                                                  new_complex_binop constructor)
3750 {
3751         dbg_info      *dbgi   = get_dbg_info(&binexpr->base.pos);
3752         expression_t  *lefte  = binexpr->left;
3753         expression_t  *righte = binexpr->right;
3754         ir_mode       *mode   = get_complex_mode_arithmetic(righte->base.type);
3755         ir_node       *addr   = expression_to_addr(lefte);
3756         complex_value  left   = get_complex_from_lvalue(lefte, addr);
3757         complex_value  right  = expression_to_complex(righte);
3758         left  = complex_conv(dbgi, left, mode);
3759         right = complex_conv(dbgi, right, mode);
3760         complex_value  new_value = constructor(dbgi, left, right, mode);
3761         type_t        *res_type  = skip_typeref(binexpr->base.type);
3762         set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3763         return complex_conv_to_storage(dbgi, new_value, res_type);
3764 }
3765
3766 static complex_value complex_call_to_firm(const call_expression_t *call)
3767 {
3768         ir_node         *result        = call_expression_to_firm(call);
3769         expression_t    *function      = call->function;
3770         type_t          *type          = skip_typeref(function->base.type);
3771         assert(is_type_pointer(type));
3772         pointer_type_t  *pointer_type  = &type->pointer;
3773         type_t          *points_to     = skip_typeref(pointer_type->points_to);
3774         assert(is_type_function(points_to));
3775         function_type_t *function_type = &points_to->function;
3776         type_t          *return_type   = skip_typeref(function_type->return_type);
3777         assert(is_type_complex(return_type));
3778         dbg_info        *dbgi          = get_dbg_info(&call->base.pos);
3779         return complex_deref_address(dbgi, return_type, result, cons_floats);
3780 }
3781
3782 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3783         jump_target *const true_target, jump_target *const false_target,
3784         ir_relation relation)
3785 {
3786         jump_target extra_target;
3787         init_jump_target(&extra_target, NULL);
3788
3789         complex_value left  = expression_to_complex(binexpr->left);
3790         complex_value right = expression_to_complex(binexpr->right);
3791         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3792         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->left->base.type);
3793         left  = complex_conv(dbgi, left, mode);
3794         right = complex_conv(dbgi, right, mode);
3795
3796         ir_node  *cmp_real   = new_d_Cmp(dbgi, left.real, right.real, relation);
3797         ir_node  *cond       = new_d_Cond(dbgi, cmp_real);
3798         ir_node  *true_proj  = new_Proj(cond, mode_X, pn_Cond_true);
3799         ir_node  *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3800         add_pred_to_jump_target(&extra_target, true_proj);
3801         add_pred_to_jump_target(false_target, false_proj);
3802         if (!enter_jump_target(&extra_target))
3803                 return;
3804
3805         ir_node *cmp_imag     = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3806         ir_node *condi        = new_d_Cond(dbgi, cmp_imag);
3807         ir_node *true_proj_i  = new_Proj(condi, mode_X, pn_Cond_true);
3808         ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3809         add_pred_to_jump_target(true_target, true_proj_i);
3810         add_pred_to_jump_target(false_target, false_proj_i);
3811         set_unreachable_now();
3812 }
3813
3814 static complex_value complex_to_control_flow(
3815         const expression_t *const expression, jump_target *const true_target,
3816         jump_target *const false_target)
3817 {
3818         jump_target extra_target;
3819         init_jump_target(&extra_target, NULL);
3820         complex_value       value      = expression_to_complex(expression);
3821         if (is_Const(value.real) && is_Const(value.imag)) {
3822                 ir_tarval *tv_real = get_Const_tarval(value.real);
3823                 ir_tarval *tv_imag = get_Const_tarval(value.imag);
3824                 if (tarval_is_null(tv_real) && tarval_is_null(tv_imag)) {
3825                         jump_to_target(false_target);
3826                 } else {
3827                         jump_to_target(true_target);
3828                 }
3829                 set_unreachable_now();
3830                 return value;
3831         }
3832
3833         dbg_info     *const dbgi       = get_dbg_info(&expression->base.pos);
3834         type_t       *const type       = expression->base.type;
3835         ir_mode      *const mode       = get_complex_mode_arithmetic(type);
3836         value = complex_conv(dbgi, value, mode);
3837         ir_node      *const zero       = new_Const(get_mode_null(mode));
3838         ir_node      *const cmp_real   =
3839                 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3840         ir_node      *const cond_real  = new_d_Cond(dbgi, cmp_real);
3841         ir_node      *const true_real  = new_Proj(cond_real, mode_X, pn_Cond_true);
3842         ir_node      *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3843         add_pred_to_jump_target(true_target, true_real);
3844         add_pred_to_jump_target(&extra_target, false_real);
3845         if (!enter_jump_target(&extra_target))
3846                 return value;
3847
3848         ir_node      *const cmp_imag   =
3849                 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3850         ir_node      *const cond_imag  = new_d_Cond(dbgi, cmp_imag);
3851         ir_node      *const true_imag  = new_Proj(cond_imag, mode_X, pn_Cond_true);
3852         ir_node      *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3853         add_pred_to_jump_target(true_target, true_imag);
3854         add_pred_to_jump_target(false_target, false_imag);
3855         set_unreachable_now();
3856
3857         return value;
3858 }
3859
3860 static complex_value complex_conditional_to_firm(
3861         const conditional_expression_t *const expression)
3862 {
3863         jump_target true_target;
3864         jump_target false_target;
3865         init_jump_target(&true_target,  NULL);
3866         init_jump_target(&false_target, NULL);
3867         complex_value cond_val;
3868         memset(&cond_val, 0, sizeof(cond_val));
3869         if (expression->true_expression == NULL) {
3870                 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3871                 cond_val = complex_to_control_flow(expression->condition,
3872                                                    &true_target, &false_target);
3873         } else {
3874                 expression_to_control_flow(expression->condition, &true_target, &false_target);
3875         }
3876
3877         complex_value  val;
3878         memset(&val, 0, sizeof(val));
3879         jump_target    exit_target;
3880         init_jump_target(&exit_target, NULL);
3881         type_t   *const type = skip_typeref(expression->base.type);
3882         ir_mode  *const mode = get_complex_mode_arithmetic(type);
3883         dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3884
3885         if (enter_jump_target(&true_target)) {
3886                 if (expression->true_expression) {
3887                         val = expression_to_complex(expression->true_expression);
3888                 } else {
3889                         assert(cond_val.real != NULL);
3890                         val = cond_val;
3891                 }
3892                 val = complex_conv(dbgi, val, mode);
3893                 jump_to_target(&exit_target);
3894         }
3895
3896         if (enter_jump_target(&false_target)) {
3897                 complex_value false_val
3898                         = expression_to_complex(expression->false_expression);
3899                 false_val = complex_conv(dbgi, false_val, mode);
3900                 jump_to_target(&exit_target);
3901                 if (val.real != NULL) {
3902                         ir_node  *const inr[] = { val.real, false_val.real };
3903                         ir_node  *const ini[] = { val.imag, false_val.imag };
3904                         ir_node  *const block = exit_target.block;
3905                         val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3906                         val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3907                 } else {
3908                         val = false_val;
3909                 }
3910         }
3911
3912         if (!enter_jump_target(&exit_target)) {
3913                 set_cur_block(new_Block(0, NULL));
3914                 assert(!is_type_void(type));
3915                 val.real = val.imag = new_Bad(mode);
3916         }
3917         return val;
3918 }
3919
3920 static void create_local_declarations(entity_t*);
3921
3922 static complex_value compound_statement_to_firm_complex(
3923         const compound_statement_t *compound)
3924 {
3925         create_local_declarations(compound->scope.entities);
3926
3927         complex_value result    = { NULL, NULL };
3928         statement_t  *statement = compound->statements;
3929         statement_t  *next;
3930         for ( ; statement != NULL; statement = next) {
3931                 next = statement->base.next;
3932                 /* last statement is the return value */
3933                 if (next == NULL) {
3934                         /* it must be an expression, otherwise we wouldn't be in the
3935                          * complex variant of compound_statement_to_firm */
3936                         if (statement->kind != STATEMENT_EXPRESSION)
3937                                 panic("last member of complex statement expression not an expression statement");
3938                         expression_t *expression = statement->expression.expression;
3939                         assert(is_type_complex(skip_typeref(expression->base.type)));
3940                         result = expression_to_complex(expression);
3941                 } else {
3942                         statement_to_firm(statement);
3943                 }
3944         }
3945
3946         return result;
3947 }
3948
3949 static complex_value complex_assign_to_firm(const binary_expression_t *expr)
3950 {
3951         dbg_info     *const dbgi  = get_dbg_info(&expr->base.pos);
3952         complex_value const value = expression_to_complex(expr->right);
3953         ir_node      *const addr  = expression_to_addr(expr->left);
3954         set_complex_value_for_expression(dbgi, expr->left, value, addr);
3955         return value;
3956 }
3957
3958 static complex_value complex_statement_expression_to_firm(
3959         const statement_expression_t *const expr)
3960 {
3961         const statement_t *const statement = expr->statement;
3962         assert(statement->kind == STATEMENT_COMPOUND);
3963
3964         return compound_statement_to_firm_complex(&statement->compound);
3965 }
3966
3967 static complex_value expression_to_complex(const expression_t *expression)
3968 {
3969         switch (expression->kind) {
3970         case EXPR_REFERENCE:
3971                 return complex_reference_to_firm(&expression->reference);
3972         case EXPR_SELECT:
3973                 return complex_select_to_firm(&expression->select);
3974         case EXPR_ARRAY_ACCESS:
3975                 return complex_array_access_to_firm(&expression->array_access);
3976         case EXPR_UNARY_CAST:
3977                 return complex_cast_to_firm(&expression->unary);
3978         case EXPR_BINARY_COMMA:
3979                 evaluate_expression_discard_result(expression->binary.left);
3980                 return expression_to_complex(expression->binary.right);
3981         case EXPR_BINARY_ADD:
3982                 return create_complex_binop(&expression->binary, new_complex_add);
3983         case EXPR_BINARY_ADD_ASSIGN:
3984                 return create_complex_assign_binop(&expression->binary, new_complex_add);
3985         case EXPR_BINARY_SUB:
3986                 return create_complex_binop(&expression->binary, new_complex_sub);
3987         case EXPR_BINARY_SUB_ASSIGN:
3988                 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3989         case EXPR_BINARY_MUL:
3990                 return create_complex_binop(&expression->binary, new_complex_mul);
3991         case EXPR_BINARY_MUL_ASSIGN:
3992                 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3993         case EXPR_BINARY_DIV:
3994                 return create_complex_binop(&expression->binary, new_complex_div);
3995         case EXPR_BINARY_DIV_ASSIGN:
3996                 return create_complex_assign_binop(&expression->binary, new_complex_div);
3997         case EXPR_UNARY_PLUS:
3998                 return expression_to_complex(expression->unary.value);
3999         case EXPR_UNARY_PREFIX_INCREMENT:
4000                 return create_complex_assign_unop(&expression->unary,
4001                                                   new_complex_increment, false);
4002         case EXPR_UNARY_PREFIX_DECREMENT:
4003                 return create_complex_assign_unop(&expression->unary,
4004                                                   new_complex_decrement, false);
4005         case EXPR_UNARY_POSTFIX_INCREMENT:
4006                 return create_complex_assign_unop(&expression->unary,
4007                                                   new_complex_increment, true);
4008         case EXPR_UNARY_POSTFIX_DECREMENT:
4009                 return create_complex_assign_unop(&expression->unary,
4010                                                   new_complex_decrement, true);
4011         case EXPR_UNARY_NEGATE:
4012                 return complex_negate_to_firm(&expression->unary);
4013         case EXPR_UNARY_COMPLEMENT:
4014                 return complex_complement_to_firm(&expression->unary);
4015         case EXPR_BINARY_ASSIGN:
4016                 return complex_assign_to_firm(&expression->binary);
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         case EXPR_STATEMENT:
4024                 return complex_statement_expression_to_firm(&expression->statement);
4025         default:
4026                 panic("unexpected complex expression");
4027         }
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;
4937         } else {
4938                 return expression_to_value(statement->expression);
4939         }
4940 }
4941
4942 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4943 {
4944         create_local_declarations(compound->scope.entities);
4945
4946         ir_node     *result    = NULL;
4947         statement_t *statement = compound->statements;
4948         for ( ; statement != NULL; statement = statement->base.next) {
4949                 result = statement_to_firm(statement);
4950         }
4951
4952         return result;
4953 }
4954
4955 static void create_global_variable(entity_t *entity)
4956 {
4957         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4958         ir_visibility       visibility = ir_visibility_external;
4959         storage_class_tag_t storage
4960                 = (storage_class_tag_t)entity->declaration.storage_class;
4961         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4962         assert(entity->kind == ENTITY_VARIABLE);
4963
4964         switch (storage) {
4965         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4966         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4967         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4968         case STORAGE_CLASS_TYPEDEF:
4969         case STORAGE_CLASS_AUTO:
4970         case STORAGE_CLASS_REGISTER:
4971                 panic("invalid storage class for global var");
4972         }
4973
4974         /* "common" symbols */
4975         if (storage == STORAGE_CLASS_NONE
4976             && entity->variable.initializer == NULL
4977             && !entity->variable.thread_local
4978             && (modifiers & DM_WEAK) == 0) {
4979                 linkage |= IR_LINKAGE_MERGE;
4980         }
4981
4982         ir_type *var_type = get_glob_type();
4983         if (entity->variable.thread_local) {
4984                 var_type = get_tls_type();
4985         }
4986         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4987         ir_entity *irentity = entity->variable.v.entity;
4988         add_entity_linkage(irentity, linkage);
4989         set_entity_visibility(irentity, visibility);
4990         if (entity->variable.initializer == NULL
4991             && storage != STORAGE_CLASS_EXTERN) {
4992                 ir_initializer_t *null_init = get_initializer_null();
4993                 set_entity_initializer(irentity, null_init);
4994         }
4995 }
4996
4997 static void create_local_declaration(entity_t *entity)
4998 {
4999         assert(is_declaration(entity));
5000
5001         /* construct type */
5002         (void) get_ir_type(entity->declaration.type);
5003         if (entity->base.symbol == NULL) {
5004                 return;
5005         }
5006
5007         switch ((storage_class_tag_t) entity->declaration.storage_class) {
5008         case STORAGE_CLASS_STATIC:
5009                 if (entity->kind == ENTITY_FUNCTION) {
5010                         (void)get_function_entity(entity, NULL);
5011                 } else {
5012                         create_local_static_variable(entity);
5013                 }
5014                 return;
5015         case STORAGE_CLASS_EXTERN:
5016                 if (entity->kind == ENTITY_FUNCTION) {
5017                         assert(entity->function.body == NULL);
5018                         (void)get_function_entity(entity, NULL);
5019                 } else {
5020                         create_global_variable(entity);
5021                         create_variable_initializer(entity);
5022                 }
5023                 return;
5024         case STORAGE_CLASS_NONE:
5025         case STORAGE_CLASS_AUTO:
5026         case STORAGE_CLASS_REGISTER:
5027                 if (entity->kind == ENTITY_FUNCTION) {
5028                         if (entity->function.body != NULL) {
5029                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
5030                                 (void)get_function_entity(entity, owner);
5031                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5032                                 enqueue_inner_function(entity);
5033                         } else {
5034                                 (void)get_function_entity(entity, NULL);
5035                         }
5036                 } else {
5037                         create_local_variable(entity);
5038                 }
5039                 return;
5040         case STORAGE_CLASS_TYPEDEF:
5041                 break;
5042         }
5043         panic("invalid storage class");
5044 }
5045
5046 static void create_local_declarations(entity_t *e)
5047 {
5048         for (; e; e = e->base.next) {
5049                 if (is_declaration(e))
5050                         create_local_declaration(e);
5051         }
5052 }
5053
5054 static void initialize_local_declaration(entity_t *entity)
5055 {
5056         if (entity->base.symbol == NULL)
5057                 return;
5058
5059         // no need to emit code in dead blocks
5060         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5061                         && !currently_reachable())
5062                 return;
5063
5064         switch ((declaration_kind_t) entity->declaration.kind) {
5065         case DECLARATION_KIND_LOCAL_VARIABLE:
5066         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5067                 create_variable_initializer(entity);
5068                 return;
5069
5070         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5071                 allocate_variable_length_array(entity);
5072                 return;
5073
5074         case DECLARATION_KIND_COMPOUND_MEMBER:
5075         case DECLARATION_KIND_GLOBAL_VARIABLE:
5076         case DECLARATION_KIND_FUNCTION:
5077         case DECLARATION_KIND_INNER_FUNCTION:
5078                 return;
5079
5080         case DECLARATION_KIND_PARAMETER:
5081         case DECLARATION_KIND_PARAMETER_ENTITY:
5082                 panic("can't initialize parameters");
5083
5084         case DECLARATION_KIND_UNKNOWN:
5085                 panic("can't initialize unknown declaration");
5086         }
5087         panic("invalid declaration kind");
5088 }
5089
5090 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5091 {
5092         entity_t *entity = statement->declarations_begin;
5093         if (entity == NULL)
5094                 return NULL;
5095
5096         entity_t *const last = statement->declarations_end;
5097         for ( ;; entity = entity->base.next) {
5098                 if (is_declaration(entity)) {
5099                         initialize_local_declaration(entity);
5100                 } else if (entity->kind == ENTITY_TYPEDEF) {
5101                         /* §6.7.7:3  Any array size expressions associated with variable length
5102                          * array declarators are evaluated each time the declaration of the
5103                          * typedef name is reached in the order of execution. */
5104                         type_t *const type = skip_typeref(entity->typedefe.type);
5105                         if (is_type_array(type) && type->array.is_vla)
5106                                 get_vla_size(&type->array);
5107                 }
5108                 if (entity == last)
5109                         break;
5110         }
5111
5112         return NULL;
5113 }
5114
5115 static ir_node *if_statement_to_firm(if_statement_t *statement)
5116 {
5117         create_local_declarations(statement->scope.entities);
5118
5119         /* Create the condition. */
5120         jump_target true_target;
5121         jump_target false_target;
5122         init_jump_target(&true_target,  NULL);
5123         init_jump_target(&false_target, NULL);
5124         if (currently_reachable())
5125                 expression_to_control_flow(statement->condition, &true_target, &false_target);
5126
5127         jump_target exit_target;
5128         init_jump_target(&exit_target, NULL);
5129
5130         /* Create the true statement. */
5131         enter_jump_target(&true_target);
5132         statement_to_firm(statement->true_statement);
5133         jump_to_target(&exit_target);
5134
5135         /* Create the false statement. */
5136         enter_jump_target(&false_target);
5137         if (statement->false_statement)
5138                 statement_to_firm(statement->false_statement);
5139         jump_to_target(&exit_target);
5140
5141         enter_jump_target(&exit_target);
5142         return NULL;
5143 }
5144
5145 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5146 {
5147         create_local_declarations(statement->scope.entities);
5148
5149         PUSH_BREAK(NULL);
5150         PUSH_CONTINUE(NULL);
5151
5152         expression_t *const cond = statement->condition;
5153         /* Avoid an explicit body block in case of do ... while (0);. */
5154         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
5155                 /* do ... while (0);. */
5156                 statement_to_firm(statement->body);
5157                 jump_to_target(&continue_target);
5158                 enter_jump_target(&continue_target);
5159                 jump_to_target(&break_target);
5160         } else {
5161                 jump_target body_target;
5162                 init_jump_target(&body_target, NULL);
5163                 jump_to_target(&body_target);
5164                 enter_immature_jump_target(&body_target);
5165                 keep_loop();
5166                 statement_to_firm(statement->body);
5167                 jump_to_target(&continue_target);
5168                 if (enter_jump_target(&continue_target))
5169                         expression_to_control_flow(statement->condition, &body_target, &break_target);
5170                 enter_jump_target(&body_target);
5171         }
5172         enter_jump_target(&break_target);
5173
5174         POP_CONTINUE();
5175         POP_BREAK();
5176         return NULL;
5177 }
5178
5179 static ir_node *for_statement_to_firm(for_statement_t *statement)
5180 {
5181         create_local_declarations(statement->scope.entities);
5182
5183         if (currently_reachable()) {
5184                 entity_t *entity = statement->scope.entities;
5185                 for ( ; entity != NULL; entity = entity->base.next) {
5186                         if (!is_declaration(entity))
5187                                 continue;
5188
5189                         initialize_local_declaration(entity);
5190                 }
5191
5192                 if (statement->initialisation != NULL) {
5193                         expression_to_value(statement->initialisation);
5194                 }
5195         }
5196
5197         /* Create the header block */
5198         jump_target header_target;
5199         init_jump_target(&header_target, NULL);
5200         jump_to_target(&header_target);
5201         enter_immature_jump_target(&header_target);
5202         keep_loop();
5203
5204         expression_t *const step = statement->step;
5205         PUSH_BREAK(NULL);
5206         PUSH_CONTINUE(step ? NULL : header_target.block);
5207
5208         /* Create the condition. */
5209         expression_t *const cond = statement->condition;
5210         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
5211                 jump_target body_target;
5212                 init_jump_target(&body_target, NULL);
5213                 expression_to_control_flow(cond, &body_target, &break_target);
5214                 enter_jump_target(&body_target);
5215         }
5216
5217         /* Create the loop body. */
5218         statement_to_firm(statement->body);
5219         jump_to_target(&continue_target);
5220
5221         /* Create the step code. */
5222         if (step && enter_jump_target(&continue_target)) {
5223                 expression_to_value(step);
5224                 jump_to_target(&header_target);
5225         }
5226
5227         enter_jump_target(&header_target);
5228         enter_jump_target(&break_target);
5229
5230         POP_CONTINUE();
5231         POP_BREAK();
5232         return NULL;
5233 }
5234
5235 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5236 {
5237         /* determine number of cases */
5238         size_t n_cases = 0;
5239         for (case_label_statement_t *l = statement->first_case; l != NULL;
5240              l = l->next) {
5241                 /* default case */
5242                 if (l->expression == NULL)
5243                         continue;
5244                 if (l->is_empty_range)
5245                         continue;
5246                 ++n_cases;
5247         }
5248
5249         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5250         size_t           i   = 0;
5251         for (case_label_statement_t *l = statement->first_case; l != NULL;
5252              l = l->next) {
5253             if (l->expression == NULL) {
5254                         l->pn = pn_Switch_default;
5255                         continue;
5256                 }
5257                 if (l->is_empty_range)
5258                         continue;
5259                 ir_tarval *min = l->first_case;
5260                 ir_tarval *max = l->last_case;
5261                 long       pn  = (long) i+1;
5262                 ir_switch_table_set(res, i++, min, max, pn);
5263                 l->pn = pn;
5264         }
5265         return res;
5266 }
5267
5268 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5269 {
5270         dbg_info *dbgi        = get_dbg_info(&statement->base.pos);
5271         ir_node  *switch_node = NULL;
5272
5273         if (currently_reachable()) {
5274                 ir_node *expression = expression_to_value(statement->expression);
5275                 ir_switch_table *table = create_switch_table(statement);
5276                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5277
5278                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5279         }
5280
5281         set_unreachable_now();
5282
5283         PUSH_BREAK(NULL);
5284         ir_node *const old_switch            = current_switch;
5285         const bool     old_saw_default_label = saw_default_label;
5286         saw_default_label                    = false;
5287         current_switch                       = switch_node;
5288
5289         statement_to_firm(statement->body);
5290         jump_to_target(&break_target);
5291
5292         if (!saw_default_label && switch_node) {
5293                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5294                 add_pred_to_jump_target(&break_target, proj);
5295         }
5296
5297         enter_jump_target(&break_target);
5298
5299         assert(current_switch == switch_node);
5300         current_switch    = old_switch;
5301         saw_default_label = old_saw_default_label;
5302         POP_BREAK();
5303         return NULL;
5304 }
5305
5306 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5307 {
5308         if (current_switch != NULL && !statement->is_empty_range) {
5309                 jump_target case_target;
5310                 init_jump_target(&case_target, NULL);
5311
5312                 /* Fallthrough from previous case */
5313                 jump_to_target(&case_target);
5314
5315                 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5316                 add_pred_to_jump_target(&case_target, proj);
5317                 if (statement->expression == NULL)
5318                         saw_default_label = true;
5319
5320                 enter_jump_target(&case_target);
5321         }
5322
5323         return statement_to_firm(statement->statement);
5324 }
5325
5326 static ir_node *label_to_firm(const label_statement_t *statement)
5327 {
5328         label_t *const label = statement->label;
5329         prepare_label_target(label);
5330         jump_to_target(&label->target);
5331         if (--label->n_users == 0) {
5332                 enter_jump_target(&label->target);
5333         } else {
5334                 enter_immature_jump_target(&label->target);
5335                 keep_loop();
5336         }
5337
5338         return statement_to_firm(statement->statement);
5339 }
5340
5341 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5342 {
5343         label_t *const label = stmt->label;
5344         prepare_label_target(label);
5345         jump_to_target(&label->target);
5346         if (--label->n_users == 0)
5347                 enter_jump_target(&label->target);
5348         set_unreachable_now();
5349         return NULL;
5350 }
5351
5352 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5353 {
5354         if (currently_reachable()) {
5355                 ir_node *const op = expression_to_value(statement->expression);
5356                 ARR_APP1(ir_node*, ijmp_ops, op);
5357                 jump_to_target(&ijmp_target);
5358                 set_unreachable_now();
5359         }
5360         return NULL;
5361 }
5362
5363 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5364 {
5365         bool           needs_memory = statement->is_volatile;
5366         size_t         n_clobbers   = 0;
5367         asm_clobber_t *clobber      = statement->clobbers;
5368         for ( ; clobber != NULL; clobber = clobber->next) {
5369                 const char *clobber_str = clobber->clobber.begin;
5370
5371                 if (!be_is_valid_clobber(clobber_str)) {
5372                         errorf(&statement->base.pos,
5373                                    "invalid clobber '%s' specified", clobber->clobber);
5374                         continue;
5375                 }
5376
5377                 if (streq(clobber_str, "memory")) {
5378                         needs_memory = true;
5379                         continue;
5380                 }
5381
5382                 ident *id = new_id_from_str(clobber_str);
5383                 obstack_ptr_grow(&asm_obst, id);
5384                 ++n_clobbers;
5385         }
5386         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5387         ident **clobbers = NULL;
5388         if (n_clobbers > 0) {
5389                 clobbers = obstack_finish(&asm_obst);
5390         }
5391
5392         size_t n_inputs  = 0;
5393         asm_argument_t *argument = statement->inputs;
5394         for ( ; argument != NULL; argument = argument->next)
5395                 n_inputs++;
5396         size_t n_outputs = 0;
5397         argument = statement->outputs;
5398         for ( ; argument != NULL; argument = argument->next)
5399                 n_outputs++;
5400
5401         unsigned next_pos = 0;
5402
5403         ir_node *ins[n_inputs + n_outputs + 1];
5404         size_t   in_size = 0;
5405
5406         ir_asm_constraint tmp_in_constraints[n_outputs];
5407
5408         const expression_t *out_exprs[n_outputs];
5409         ir_node            *out_addrs[n_outputs];
5410         size_t              out_size = 0;
5411
5412         argument = statement->outputs;
5413         for ( ; argument != NULL; argument = argument->next) {
5414                 const char *constraints = argument->constraints.begin;
5415                 asm_constraint_flags_t asm_flags
5416                         = be_parse_asm_constraints(constraints);
5417
5418                 {
5419                         position_t const *const pos = &statement->base.pos;
5420                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5421                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5422                         }
5423                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5424                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5425                                 continue;
5426                         }
5427                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5428                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5429                                 continue;
5430                         }
5431                 }
5432
5433                 unsigned pos = next_pos++;
5434                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5435                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5436                         expression_t *expr = argument->expression;
5437                         ir_node      *addr = expression_to_addr(expr);
5438                         /* in+output, construct an artifical same_as constraint on the
5439                          * input */
5440                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5441                                 char     buf[64];
5442                                 ir_node *value = get_value_from_lvalue(expr, addr);
5443
5444                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5445
5446                                 ir_asm_constraint constraint;
5447                                 constraint.pos              = pos;
5448                                 constraint.constraint       = new_id_from_str(buf);
5449                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5450                                 tmp_in_constraints[in_size] = constraint;
5451                                 ins[in_size] = value;
5452
5453                                 ++in_size;
5454                         }
5455
5456                         out_exprs[out_size] = expr;
5457                         out_addrs[out_size] = addr;
5458                         ++out_size;
5459                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5460                         /* pure memory ops need no input (but we have to make sure we
5461                          * attach to the memory) */
5462                         assert(! (asm_flags &
5463                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5464                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5465                         needs_memory = true;
5466
5467                         /* we need to attach the address to the inputs */
5468                         expression_t *expr = argument->expression;
5469
5470                         ir_asm_constraint constraint;
5471                         constraint.pos              = pos;
5472                         constraint.constraint       = new_id_from_str(constraints);
5473                         constraint.mode             = mode_M;
5474                         tmp_in_constraints[in_size] = constraint;
5475
5476                         ins[in_size] = expression_to_addr(expr);
5477                         ++in_size;
5478                         continue;
5479                 } else {
5480                         errorf(&statement->base.pos,
5481                                "only modifiers but no place set in constraints '%s'",
5482                                constraints);
5483                         continue;
5484                 }
5485
5486                 ir_asm_constraint constraint;
5487                 constraint.pos        = pos;
5488                 constraint.constraint = new_id_from_str(constraints);
5489                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5490
5491                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5492         }
5493         assert(obstack_object_size(&asm_obst)
5494                         == out_size * sizeof(ir_asm_constraint));
5495         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5496
5497
5498         obstack_grow(&asm_obst, tmp_in_constraints,
5499                      in_size * sizeof(tmp_in_constraints[0]));
5500         /* find and count input and output arguments */
5501         argument = statement->inputs;
5502         for ( ; argument != NULL; argument = argument->next) {
5503                 const char *constraints = argument->constraints.begin;
5504                 asm_constraint_flags_t asm_flags
5505                         = be_parse_asm_constraints(constraints);
5506
5507                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5508                         errorf(&statement->base.pos,
5509                                "some constraints in '%s' are not supported", constraints);
5510                         continue;
5511                 }
5512                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5513                         errorf(&statement->base.pos,
5514                                "some constraints in '%s' are invalid", constraints);
5515                         continue;
5516                 }
5517                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5518                         errorf(&statement->base.pos,
5519                                "write flag specified for input constraints '%s'",
5520                                constraints);
5521                         continue;
5522                 }
5523
5524                 ir_node *input;
5525                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5526                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5527                         /* we can treat this as "normal" input */
5528                         input = expression_to_value(argument->expression);
5529                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5530                         /* pure memory ops need no input (but we have to make sure we
5531                          * attach to the memory) */
5532                         assert(! (asm_flags &
5533                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5534                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5535                         needs_memory = true;
5536                         input = expression_to_addr(argument->expression);
5537                 } else {
5538                         errorf(&statement->base.pos,
5539                                "only modifiers but no place set in constraints '%s'",
5540                                constraints);
5541                         continue;
5542                 }
5543
5544                 ir_asm_constraint constraint;
5545                 constraint.pos        = next_pos++;
5546                 constraint.constraint = new_id_from_str(constraints);
5547                 constraint.mode       = get_irn_mode(input);
5548
5549                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5550                 ins[in_size++] = input;
5551         }
5552
5553         ir_node *mem = needs_memory ? get_store() : new_NoMem();
5554         assert(obstack_object_size(&asm_obst)
5555                         == in_size * sizeof(ir_asm_constraint));
5556         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5557
5558         /* create asm node */
5559         dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5560
5561         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5562
5563         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5564                                   out_size, output_constraints,
5565                                   n_clobbers, clobbers, asm_text);
5566
5567         if (statement->is_volatile) {
5568                 set_irn_pinned(node, op_pin_state_pinned);
5569         } else {
5570                 set_irn_pinned(node, op_pin_state_floats);
5571         }
5572
5573         /* create output projs & connect them */
5574         if (needs_memory) {
5575                 ir_node *projm = new_Proj(node, mode_M, out_size);
5576                 set_store(projm);
5577         }
5578
5579         size_t i;
5580         for (i = 0; i < out_size; ++i) {
5581                 const expression_t *out_expr = out_exprs[i];
5582                 long                pn       = i;
5583                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5584                 ir_node            *proj     = new_Proj(node, mode, pn);
5585                 ir_node            *addr     = out_addrs[i];
5586
5587                 set_value_for_expression_addr(out_expr, proj, addr);
5588         }
5589
5590         return NULL;
5591 }
5592
5593 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5594 {
5595         statement_to_firm(statement->try_statement);
5596         position_t const *const pos = &statement->base.pos;
5597         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5598         return NULL;
5599 }
5600
5601 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5602 {
5603         errorf(&statement->base.pos, "__leave not supported yet");
5604         return NULL;
5605 }
5606
5607 /**
5608  * Transform a statement.
5609  */
5610 static ir_node *statement_to_firm(statement_t *const stmt)
5611 {
5612 #ifndef NDEBUG
5613         assert(!stmt->base.transformed);
5614         stmt->base.transformed = true;
5615 #endif
5616
5617         switch (stmt->kind) {
5618         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5619         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5620         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5621         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5622         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5623         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5624         case STATEMENT_EMPTY:         return NULL; /* nothing */
5625         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5626         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5627         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
5628         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5629         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5630         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5631         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5632         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5633         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5634
5635         {
5636                 jump_target *tgt;
5637         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
5638         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5639 jump:
5640                 jump_to_target(tgt);
5641                 set_unreachable_now();
5642                 return NULL;
5643         }
5644
5645         case STATEMENT_ERROR: panic("error statement");
5646         }
5647         panic("statement not implemented");
5648 }
5649
5650 static int count_local_variables(const entity_t *entity,
5651                                  const entity_t *const last)
5652 {
5653         int count = 0;
5654         entity_t const *const end = last != NULL ? last->base.next : NULL;
5655         for (; entity != end; entity = entity->base.next) {
5656                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5657                     !var_needs_entity(&entity->variable)) {
5658                     type_t *type = skip_typeref(entity->declaration.type);
5659                         count += is_type_complex(type) ? 2 : 1;
5660                 }
5661         }
5662         return count;
5663 }
5664
5665 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5666 {
5667         int *const count = env;
5668
5669         switch (stmt->kind) {
5670         case STATEMENT_DECLARATION: {
5671                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5672                 *count += count_local_variables(decl_stmt->declarations_begin,
5673                                 decl_stmt->declarations_end);
5674                 break;
5675         }
5676
5677         case STATEMENT_FOR:
5678                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5679                 break;
5680
5681         default:
5682                 break;
5683         }
5684 }
5685
5686 /**
5687  * Return the number of local (alias free) variables used by a function.
5688  */
5689 static int get_function_n_local_vars(entity_t *entity)
5690 {
5691         const function_t *function = &entity->function;
5692         int count = 0;
5693
5694         /* count parameters */
5695         count += count_local_variables(function->parameters.entities, NULL);
5696
5697         /* count local variables declared in body */
5698         walk_statements(function->body, count_local_variables_in_stmt, &count);
5699         return count;
5700 }
5701
5702 /**
5703  * Build Firm code for the parameters of a function.
5704  */
5705 static void initialize_function_parameters(entity_t *entity)
5706 {
5707         assert(entity->kind == ENTITY_FUNCTION);
5708         ir_graph *irg             = current_ir_graph;
5709         ir_node  *args            = get_irg_args(irg);
5710         int       n               = 0;
5711         ir_type  *function_irtype;
5712
5713         if (entity->function.need_closure) {
5714                 /* add an extra parameter for the static link */
5715                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5716                 ++n;
5717
5718                 /* Matze: IMO this is wrong, nested functions should have an own
5719                  * type and not rely on strange parameters... */
5720                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5721         } else {
5722                 function_irtype = get_ir_type(entity->declaration.type);
5723         }
5724
5725         entity_t *parameter = entity->function.parameters.entities;
5726         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5727                 if (parameter->kind != ENTITY_PARAMETER)
5728                         continue;
5729
5730                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5731                 type_t *type = skip_typeref(parameter->declaration.type);
5732
5733                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.pos);
5734                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5735                 if (var_needs_entity(&parameter->variable)) {
5736                         ir_type   *frame_type = get_irg_frame_type(irg);
5737                         ir_entity *param
5738                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5739                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5740                         parameter->variable.v.entity = param;
5741                 } else if (is_type_complex(type)) {
5742                         ir_type   *frame_type = get_irg_frame_type(irg);
5743                         ir_entity *param
5744                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5745                         ir_node   *nomem = get_irg_no_mem(irg);
5746                         ir_node   *frame = get_irg_frame(irg);
5747                         ir_node   *addr  = new_simpleSel(nomem, frame, param);
5748                         complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5749
5750                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5751                         parameter->variable.v.value_number = next_value_number_function;
5752                         set_irg_loc_description(irg, next_value_number_function,
5753                                                                         parameter);
5754                         set_irg_loc_description(irg, next_value_number_function+1,
5755                                                                         parameter);
5756                         set_value(next_value_number_function, value.real);
5757                         set_value(next_value_number_function+1, value.imag);
5758                         next_value_number_function += 2;
5759                 } else {
5760                         ir_mode *param_mode = get_type_mode(param_irtype);
5761                         long     pn         = n;
5762                         ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5763                         value = conv_to_storage_type(dbgi, value, type);
5764
5765                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5766                         parameter->variable.v.value_number = next_value_number_function;
5767                         set_irg_loc_description(irg, next_value_number_function,
5768                                                                         parameter);
5769                         ++next_value_number_function;
5770
5771                         set_value(parameter->variable.v.value_number, value);
5772                 }
5773         }
5774 }
5775
5776 static void add_function_pointer(ir_type *segment, ir_entity *method,
5777                                  const char *unique_template)
5778 {
5779         ir_type   *method_type  = get_entity_type(method);
5780         ir_type   *ptr_type     = new_type_pointer(method_type);
5781
5782         /* these entities don't really have a name but firm only allows
5783          * "" in ld_ident.
5784          * Note that we mustn't give these entities a name since for example
5785          * Mach-O doesn't allow them. */
5786         ident     *ide          = id_unique(unique_template);
5787         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5788         ir_graph  *irg          = get_const_code_irg();
5789         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5790                                                            method);
5791
5792         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5793         set_entity_compiler_generated(ptr, 1);
5794         set_entity_visibility(ptr, ir_visibility_private);
5795         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5796         set_atomic_ent_value(ptr, val);
5797 }
5798
5799 /**
5800  * Create code for a function and all inner functions.
5801  *
5802  * @param entity  the function entity
5803  */
5804 static void create_function(entity_t *entity)
5805 {
5806         assert(entity->kind == ENTITY_FUNCTION);
5807         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5808
5809         if (entity->function.body == NULL)
5810                 return;
5811
5812         inner_functions     = NULL;
5813         current_trampolines = NULL;
5814
5815         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5816                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5817                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5818         }
5819         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5820                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5821                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5822         }
5823
5824         current_function_entity = entity;
5825         current_function_name   = NULL;
5826         current_funcsig         = NULL;
5827
5828         assert(!ijmp_ops);
5829         assert(!ijmp_blocks);
5830         init_jump_target(&ijmp_target, NULL);
5831         ijmp_ops    = NEW_ARR_F(ir_node*, 0);
5832         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5833
5834         int       n_local_vars = get_function_n_local_vars(entity);
5835         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5836         current_ir_graph = irg;
5837
5838         ir_graph *old_current_function = current_function;
5839         current_function = irg;
5840
5841         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5842         current_vararg_entity = NULL;
5843
5844         set_irg_fp_model(irg, firm_fp_model);
5845         set_irn_dbg_info(get_irg_start_block(irg),
5846                          get_entity_dbg_info(function_entity));
5847
5848         next_value_number_function = 0;
5849         initialize_function_parameters(entity);
5850         current_static_link = entity->function.static_link;
5851
5852         statement_to_firm(entity->function.body);
5853
5854         ir_node *end_block = get_irg_end_block(irg);
5855
5856         /* do we have a return statement yet? */
5857         if (currently_reachable()) {
5858                 type_t *type = skip_typeref(entity->declaration.type);
5859                 assert(is_type_function(type));
5860                 type_t *const return_type = skip_typeref(type->function.return_type);
5861
5862                 ir_node *ret;
5863                 if (is_type_void(return_type)) {
5864                         ret = new_Return(get_store(), 0, NULL);
5865                 } else {
5866                         ir_mode *const mode = get_ir_mode_storage(return_type);
5867
5868                         ir_node *in[1];
5869                         /* §5.1.2.2.3 main implicitly returns 0 */
5870                         if (is_main(entity)) {
5871                                 in[0] = new_Const(get_mode_null(mode));
5872                         } else {
5873                                 in[0] = new_Unknown(mode);
5874                         }
5875                         ret = new_Return(get_store(), 1, in);
5876                 }
5877                 add_immBlock_pred(end_block, ret);
5878         }
5879
5880         if (enter_jump_target(&ijmp_target)) {
5881                 keep_loop();
5882                 size_t   const n    = ARR_LEN(ijmp_ops);
5883                 ir_node *const op   = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5884                 ir_node *const ijmp = new_IJmp(op);
5885                 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5886                         ir_node *const block = ijmp_blocks[i];
5887                         add_immBlock_pred(block, ijmp);
5888                         mature_immBlock(block);
5889                 }
5890         }
5891
5892         DEL_ARR_F(ijmp_ops);
5893         DEL_ARR_F(ijmp_blocks);
5894         ijmp_ops    = NULL;
5895         ijmp_blocks = NULL;
5896
5897         irg_finalize_cons(irg);
5898
5899         /* finalize the frame type */
5900         ir_type *frame_type = get_irg_frame_type(irg);
5901         int      n          = get_compound_n_members(frame_type);
5902         int      align_all  = 4;
5903         int      offset     = 0;
5904         for (int i = 0; i < n; ++i) {
5905                 ir_entity *member      = get_compound_member(frame_type, i);
5906                 ir_type   *entity_type = get_entity_type(member);
5907
5908                 int align = get_type_alignment_bytes(entity_type);
5909                 if (align > align_all)
5910                         align_all = align;
5911                 int misalign = 0;
5912                 if (align > 0) {
5913                         misalign  = offset % align;
5914                         if (misalign > 0) {
5915                                 offset += align - misalign;
5916                         }
5917                 }
5918
5919                 set_entity_offset(member, offset);
5920                 offset += get_type_size_bytes(entity_type);
5921         }
5922         set_type_size_bytes(frame_type, offset);
5923         set_type_alignment_bytes(frame_type, align_all);
5924
5925         irg_verify(irg, VERIFY_ENFORCE_SSA);
5926         current_vararg_entity = old_current_vararg_entity;
5927         current_function      = old_current_function;
5928
5929         if (current_trampolines != NULL) {
5930                 DEL_ARR_F(current_trampolines);
5931                 current_trampolines = NULL;
5932         }
5933
5934         /* create inner functions if any */
5935         entity_t **inner = inner_functions;
5936         if (inner != NULL) {
5937                 ir_type *rem_outer_frame      = current_outer_frame;
5938                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5939                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5940                         create_function(inner[i]);
5941                 }
5942                 DEL_ARR_F(inner);
5943
5944                 current_outer_frame      = rem_outer_frame;
5945         }
5946 }
5947
5948 static void scope_to_firm(scope_t *scope)
5949 {
5950         /* first pass: create declarations */
5951         entity_t *entity = scope->entities;
5952         for ( ; entity != NULL; entity = entity->base.next) {
5953                 if (entity->base.symbol == NULL)
5954                         continue;
5955
5956                 if (entity->kind == ENTITY_FUNCTION) {
5957                         if (entity->function.btk != BUILTIN_NONE) {
5958                                 /* builtins have no representation */
5959                                 continue;
5960                         }
5961                         (void)get_function_entity(entity, NULL);
5962                 } else if (entity->kind == ENTITY_VARIABLE) {
5963                         create_global_variable(entity);
5964                 } else if (entity->kind == ENTITY_NAMESPACE) {
5965                         scope_to_firm(&entity->namespacee.members);
5966                 }
5967         }
5968
5969         /* second pass: create code/initializers */
5970         entity = scope->entities;
5971         for ( ; entity != NULL; entity = entity->base.next) {
5972                 if (entity->base.symbol == NULL)
5973                         continue;
5974
5975                 if (entity->kind == ENTITY_FUNCTION) {
5976                         if (entity->function.btk != BUILTIN_NONE) {
5977                                 /* builtins have no representation */
5978                                 continue;
5979                         }
5980                         create_function(entity);
5981                 } else if (entity->kind == ENTITY_VARIABLE) {
5982                         assert(entity->declaration.kind
5983                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5984                         current_ir_graph = get_const_code_irg();
5985                         create_variable_initializer(entity);
5986                 }
5987         }
5988 }
5989
5990 void init_ast2firm(void)
5991 {
5992         obstack_init(&asm_obst);
5993         init_atomic_modes();
5994
5995         ir_set_debug_retrieve(dbg_retrieve);
5996         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5997
5998         /* create idents for all known runtime functions */
5999         for (size_t i = 0; i < lengthof(rts_data); ++i) {
6000                 rts_idents[i] = new_id_from_str(rts_data[i].name);
6001         }
6002
6003         entitymap_init(&entitymap);
6004 }
6005
6006 static void init_ir_types(void)
6007 {
6008         static int ir_types_initialized = 0;
6009         if (ir_types_initialized)
6010                 return;
6011         ir_types_initialized = 1;
6012
6013         ir_type_char = get_ir_type(type_char);
6014
6015         be_params             = be_get_backend_param();
6016         mode_float_arithmetic = be_params->mode_float_arithmetic;
6017
6018         stack_param_align     = be_params->stack_param_align;
6019 }
6020
6021 void exit_ast2firm(void)
6022 {
6023         entitymap_destroy(&entitymap);
6024         obstack_free(&asm_obst, NULL);
6025 }
6026
6027 static void global_asm_to_firm(statement_t *s)
6028 {
6029         for (; s != NULL; s = s->base.next) {
6030                 assert(s->kind == STATEMENT_ASM);
6031
6032                 char const *const text = s->asms.asm_text.begin;
6033                 size_t      const size = s->asms.asm_text.size;
6034                 ident      *const id   = new_id_from_chars(text, size);
6035                 add_irp_asm(id);
6036         }
6037 }
6038
6039 static const char *get_cwd(void)
6040 {
6041         static char buf[1024];
6042         if (buf[0] == '\0') {
6043                 return getcwd(buf, sizeof(buf));
6044         }
6045         return buf;
6046 }
6047
6048 void translation_unit_to_firm(translation_unit_t *unit)
6049 {
6050         if (c_mode & _CXX) {
6051                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6052         } else if (c_mode & _C99) {
6053                 be_dwarf_set_source_language(DW_LANG_C99);
6054         } else if (c_mode & _C89) {
6055                 be_dwarf_set_source_language(DW_LANG_C89);
6056         } else {
6057                 be_dwarf_set_source_language(DW_LANG_C);
6058         }
6059         const char *cwd = get_cwd();
6060         if (cwd != NULL) {
6061                 be_dwarf_set_compilation_directory(cwd);
6062         }
6063
6064         /* initialize firm arithmetic */
6065         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6066         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6067
6068         /* just to be sure */
6069         init_jump_target(&break_target,    NULL);
6070         init_jump_target(&continue_target, NULL);
6071         current_switch           = NULL;
6072         current_translation_unit = unit;
6073
6074         init_ir_types();
6075
6076         scope_to_firm(&unit->scope);
6077         global_asm_to_firm(unit->global_asm);
6078
6079         current_ir_graph         = NULL;
6080         current_translation_unit = NULL;
6081 }