src/v8/src/ia32/lithium-ia32.cc

   1 // Copyright 2012 the V8 project authors. All rights reserved.
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   3 // modification, are permitted provided that the following conditions are
   4 // met:
   5 //
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   7 //       notice, this list of conditions and the following disclaimer.
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   9 //       copyright notice, this list of conditions and the following
  10 //       disclaimer in the documentation and/or other materials provided
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  14 //       from this software without specific prior written permission.
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  17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27
  28 #include "v8.h"
  29
  30 #if V8_TARGET_ARCH_IA32
  31
  32 #include "lithium-allocator-inl.h"
  33 #include "ia32/lithium-ia32.h"
  34 #include "ia32/lithium-codegen-ia32.h"
  35 #include "hydrogen-osr.h"
  36
  37 namespace v8 {
  38 namespace internal {
  39
  40 #define DEFINE_COMPILE(type)                            \
  41   void L##type::CompileToNative(LCodeGen* generator) {  \
  42     generator->Do##type(this);                          \
  43   }
  44 LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
  45 #undef DEFINE_COMPILE
  46
  47
  48 #ifdef DEBUG
  49 void LInstruction::VerifyCall() {
  50   // Call instructions can use only fixed registers as temporaries and
  51   // outputs because all registers are blocked by the calling convention.
  52   // Inputs operands must use a fixed register or use-at-start policy or
  53   // a non-register policy.
  54   ASSERT(Output() == NULL ||
  55          LUnallocated::cast(Output())->HasFixedPolicy() ||
  56          !LUnallocated::cast(Output())->HasRegisterPolicy());
  57   for (UseIterator it(this); !it.Done(); it.Advance()) {
  58     LUnallocated* operand = LUnallocated::cast(it.Current());
  59     ASSERT(operand->HasFixedPolicy() ||
  60            operand->IsUsedAtStart());
  61   }
  62   for (TempIterator it(this); !it.Done(); it.Advance()) {
  63     LUnallocated* operand = LUnallocated::cast(it.Current());
  64     ASSERT(operand->HasFixedPolicy() ||!operand->HasRegisterPolicy());
  65   }
  66 }
  67 #endif
  68
  69
  70 bool LInstruction::HasDoubleRegisterResult() {
  71   return HasResult() && result()->IsDoubleRegister();
  72 }
  73
  74
  75 bool LInstruction::HasDoubleRegisterInput() {
  76   for (int i = 0; i < InputCount(); i++) {
  77     LOperand* op = InputAt(i);
  78     if (op != NULL && op->IsDoubleRegister()) {
  79       return true;
  80     }
  81   }
  82   return false;
  83 }
  84
  85
  86 bool LInstruction::IsDoubleInput(X87Register reg, LCodeGen* cgen) {
  87   for (int i = 0; i < InputCount(); i++) {
  88     LOperand* op = InputAt(i);
  89     if (op != NULL && op->IsDoubleRegister()) {
  90       if (cgen->ToX87Register(op).is(reg)) return true;
  91     }
  92   }
  93   return false;
  94 }
  95
  96
  97 void LInstruction::PrintTo(StringStream* stream) {
  98   stream->Add("%s ", this->Mnemonic());
  99
 100   PrintOutputOperandTo(stream);
 101
 102   PrintDataTo(stream);
 103
 104   if (HasEnvironment()) {
 105     stream->Add(" ");
 106     environment()->PrintTo(stream);
 107   }
 108
 109   if (HasPointerMap()) {
 110     stream->Add(" ");
 111     pointer_map()->PrintTo(stream);
 112   }
 113 }
 114
 115
 116 void LInstruction::PrintDataTo(StringStream* stream) {
 117   stream->Add("= ");
 118   for (int i = 0; i < InputCount(); i++) {
 119     if (i > 0) stream->Add(" ");
 120     if (InputAt(i) == NULL) {
 121       stream->Add("NULL");
 122     } else {
 123       InputAt(i)->PrintTo(stream);
 124     }
 125   }
 126 }
 127
 128
 129 void LInstruction::PrintOutputOperandTo(StringStream* stream) {
 130   if (HasResult()) result()->PrintTo(stream);
 131 }
 132
 133
 134 void LLabel::PrintDataTo(StringStream* stream) {
 135   LGap::PrintDataTo(stream);
 136   LLabel* rep = replacement();
 137   if (rep != NULL) {
 138     stream->Add(" Dead block replaced with B%d", rep->block_id());
 139   }
 140 }
 141
 142
 143 bool LGap::IsRedundant() const {
 144   for (int i = 0; i < 4; i++) {
 145     if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) {
 146       return false;
 147     }
 148   }
 149
 150   return true;
 151 }
 152
 153
 154 void LGap::PrintDataTo(StringStream* stream) {
 155   for (int i = 0; i < 4; i++) {
 156     stream->Add("(");
 157     if (parallel_moves_[i] != NULL) {
 158       parallel_moves_[i]->PrintDataTo(stream);
 159     }
 160     stream->Add(") ");
 161   }
 162 }
 163
 164
 165 const char* LArithmeticD::Mnemonic() const {
 166   switch (op()) {
 167     case Token::ADD: return "add-d";
 168     case Token::SUB: return "sub-d";
 169     case Token::MUL: return "mul-d";
 170     case Token::DIV: return "div-d";
 171     case Token::MOD: return "mod-d";
 172     default:
 173       UNREACHABLE();
 174       return NULL;
 175   }
 176 }
 177
 178
 179 const char* LArithmeticT::Mnemonic() const {
 180   switch (op()) {
 181     case Token::ADD: return "add-t";
 182     case Token::SUB: return "sub-t";
 183     case Token::MUL: return "mul-t";
 184     case Token::MOD: return "mod-t";
 185     case Token::DIV: return "div-t";
 186     case Token::BIT_AND: return "bit-and-t";
 187     case Token::BIT_OR: return "bit-or-t";
 188     case Token::BIT_XOR: return "bit-xor-t";
 189     case Token::ROR: return "ror-t";
 190     case Token::SHL: return "sal-t";
 191     case Token::SAR: return "sar-t";
 192     case Token::SHR: return "shr-t";
 193     default:
 194       UNREACHABLE();
 195       return NULL;
 196   }
 197 }
 198
 199
 200 bool LGoto::HasInterestingComment(LCodeGen* gen) const {
 201   return !gen->IsNextEmittedBlock(block_id());
 202 }
 203
 204
 205 void LGoto::PrintDataTo(StringStream* stream) {
 206   stream->Add("B%d", block_id());
 207 }
 208
 209
 210 void LBranch::PrintDataTo(StringStream* stream) {
 211   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
 212   value()->PrintTo(stream);
 213 }
 214
 215
 216 void LCompareNumericAndBranch::PrintDataTo(StringStream* stream) {
 217   stream->Add("if ");
 218   left()->PrintTo(stream);
 219   stream->Add(" %s ", Token::String(op()));
 220   right()->PrintTo(stream);
 221   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
 222 }
 223
 224
 225 void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
 226   stream->Add("if is_object(");
 227   value()->PrintTo(stream);
 228   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 229 }
 230
 231
 232 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
 233   stream->Add("if is_string(");
 234   value()->PrintTo(stream);
 235   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 236 }
 237
 238
 239 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
 240   stream->Add("if is_smi(");
 241   value()->PrintTo(stream);
 242   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 243 }
 244
 245
 246 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
 247   stream->Add("if is_undetectable(");
 248   value()->PrintTo(stream);
 249   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 250 }
 251
 252
 253 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
 254   stream->Add("if string_compare(");
 255   left()->PrintTo(stream);
 256   right()->PrintTo(stream);
 257   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 258 }
 259
 260
 261 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
 262   stream->Add("if has_instance_type(");
 263   value()->PrintTo(stream);
 264   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 265 }
 266
 267
 268 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
 269   stream->Add("if has_cached_array_index(");
 270   value()->PrintTo(stream);
 271   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 272 }
 273
 274
 275 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 276   stream->Add("if class_of_test(");
 277   value()->PrintTo(stream);
 278   stream->Add(", \"%o\") then B%d else B%d",
 279               *hydrogen()->class_name(),
 280               true_block_id(),
 281               false_block_id());
 282 }
 283
 284
 285 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
 286   stream->Add("if typeof ");
 287   value()->PrintTo(stream);
 288   stream->Add(" == \"%s\" then B%d else B%d",
 289               hydrogen()->type_literal()->ToCString().get(),
 290               true_block_id(), false_block_id());
 291 }
 292
 293
 294 void LStoreCodeEntry::PrintDataTo(StringStream* stream) {
 295   stream->Add(" = ");
 296   function()->PrintTo(stream);
 297   stream->Add(".code_entry = ");
 298   code_object()->PrintTo(stream);
 299 }
 300
 301
 302 void LInnerAllocatedObject::PrintDataTo(StringStream* stream) {
 303   stream->Add(" = ");
 304   base_object()->PrintTo(stream);
 305   stream->Add(" + ");
 306   offset()->PrintTo(stream);
 307 }
 308
 309
 310 void LCallJSFunction::PrintDataTo(StringStream* stream) {
 311   stream->Add("= ");
 312   function()->PrintTo(stream);
 313   stream->Add("#%d / ", arity());
 314 }
 315
 316
 317 void LCallWithDescriptor::PrintDataTo(StringStream* stream) {
 318   for (int i = 0; i < InputCount(); i++) {
 319     InputAt(i)->PrintTo(stream);
 320     stream->Add(" ");
 321   }
 322   stream->Add("#%d / ", arity());
 323 }
 324
 325
 326 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
 327   context()->PrintTo(stream);
 328   stream->Add("[%d]", slot_index());
 329 }
 330
 331
 332 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
 333   context()->PrintTo(stream);
 334   stream->Add("[%d] <- ", slot_index());
 335   value()->PrintTo(stream);
 336 }
 337
 338
 339 void LInvokeFunction::PrintDataTo(StringStream* stream) {
 340   stream->Add("= ");
 341   context()->PrintTo(stream);
 342   stream->Add(" ");
 343   function()->PrintTo(stream);
 344   stream->Add(" #%d / ", arity());
 345 }
 346
 347
 348 void LCallNew::PrintDataTo(StringStream* stream) {
 349   stream->Add("= ");
 350   context()->PrintTo(stream);
 351   stream->Add(" ");
 352   constructor()->PrintTo(stream);
 353   stream->Add(" #%d / ", arity());
 354 }
 355
 356
 357 void LCallNewArray::PrintDataTo(StringStream* stream) {
 358   stream->Add("= ");
 359   context()->PrintTo(stream);
 360   stream->Add(" ");
 361   constructor()->PrintTo(stream);
 362   stream->Add(" #%d / ", arity());
 363   ElementsKind kind = hydrogen()->elements_kind();
 364   stream->Add(" (%s) ", ElementsKindToString(kind));
 365 }
 366
 367
 368 void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
 369   arguments()->PrintTo(stream);
 370
 371   stream->Add(" length ");
 372   length()->PrintTo(stream);
 373
 374   stream->Add(" index ");
 375   index()->PrintTo(stream);
 376 }
 377
 378
 379 int LPlatformChunk::GetNextSpillIndex(RegisterKind kind) {
 380   switch (kind) {
 381     case GENERAL_REGISTERS: return spill_slot_count_++;
 382     case DOUBLE_REGISTERS: {
 383       // Skip a slot if for a double-width slot.
 384       spill_slot_count_++;
 385       spill_slot_count_ |= 1;
 386       num_double_slots_++;
 387       return spill_slot_count_++;
 388     }
 389     case FLOAT32x4_REGISTERS:
 390     case INT32x4_REGISTERS: {
 391       // Skip three slots if for a quad-width slot.
 392       spill_slot_count_ += 3;
 393       num_double_slots_ += 2;  // for dynamic frame alignment
 394       return spill_slot_count_++;
 395     }
 396     default:
 397       UNREACHABLE();
 398       return -1;
 399   }
 400 }
 401
 402
 403 LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
 404   int index = GetNextSpillIndex(kind);
 405   switch (kind) {
 406     case GENERAL_REGISTERS: return LStackSlot::Create(index, zone());
 407     case DOUBLE_REGISTERS: return LDoubleStackSlot::Create(index, zone());
 408     case FLOAT32x4_REGISTERS: return LFloat32x4StackSlot::Create(index, zone());
 409     case INT32x4_REGISTERS: return LInt32x4StackSlot::Create(index, zone());
 410     default:
 411       UNREACHABLE();
 412       return NULL;
 413   }
 414 }
 415
 416
 417 void LStoreNamedField::PrintDataTo(StringStream* stream) {
 418   object()->PrintTo(stream);
 419   hydrogen()->access().PrintTo(stream);
 420   stream->Add(" <- ");
 421   value()->PrintTo(stream);
 422 }
 423
 424
 425 void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 426   object()->PrintTo(stream);
 427   stream->Add(".");
 428   stream->Add(String::cast(*name())->ToCString().get());
 429   stream->Add(" <- ");
 430   value()->PrintTo(stream);
 431 }
 432
 433
 434 void LLoadKeyed::PrintDataTo(StringStream* stream) {
 435   elements()->PrintTo(stream);
 436   stream->Add("[");
 437   key()->PrintTo(stream);
 438   if (hydrogen()->IsDehoisted()) {
 439     stream->Add(" + %d]", additional_index());
 440   } else {
 441     stream->Add("]");
 442   }
 443 }
 444
 445
 446 void LStoreKeyed::PrintDataTo(StringStream* stream) {
 447   elements()->PrintTo(stream);
 448   stream->Add("[");
 449   key()->PrintTo(stream);
 450   if (hydrogen()->IsDehoisted()) {
 451     stream->Add(" + %d] <-", additional_index());
 452   } else {
 453     stream->Add("] <- ");
 454   }
 455
 456   if (value() == NULL) {
 457     ASSERT(hydrogen()->IsConstantHoleStore() &&
 458            hydrogen()->value()->representation().IsDouble());
 459     stream->Add("<the hole(nan)>");
 460   } else {
 461     value()->PrintTo(stream);
 462   }
 463 }
 464
 465
 466 void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
 467   object()->PrintTo(stream);
 468   stream->Add("[");
 469   key()->PrintTo(stream);
 470   stream->Add("] <- ");
 471   value()->PrintTo(stream);
 472 }
 473
 474
 475 void LTransitionElementsKind::PrintDataTo(StringStream* stream) {
 476   object()->PrintTo(stream);
 477   stream->Add(" %p -> %p", *original_map(), *transitioned_map());
 478 }
 479
 480
 481 LPlatformChunk* LChunkBuilder::Build() {
 482   ASSERT(is_unused());
 483   chunk_ = new(zone()) LPlatformChunk(info(), graph());
 484   LPhase phase("L_Building chunk", chunk_);
 485   status_ = BUILDING;
 486
 487   // Reserve the first spill slot for the state of dynamic alignment.
 488   if (info()->IsOptimizing()) {
 489     int alignment_state_index = chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
 490     ASSERT_EQ(alignment_state_index, 0);
 491     USE(alignment_state_index);
 492   }
 493
 494   // If compiling for OSR, reserve space for the unoptimized frame,
 495   // which will be subsumed into this frame.
 496   if (graph()->has_osr()) {
 497     for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) {
 498       chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
 499     }
 500   }
 501
 502   const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
 503   for (int i = 0; i < blocks->length(); i++) {
 504     HBasicBlock* next = NULL;
 505     if (i < blocks->length() - 1) next = blocks->at(i + 1);
 506     DoBasicBlock(blocks->at(i), next);
 507     if (is_aborted()) return NULL;
 508   }
 509   status_ = DONE;
 510   return chunk_;
 511 }
 512
 513
 514 void LChunkBuilder::Abort(BailoutReason reason) {
 515   info()->set_bailout_reason(reason);
 516   status_ = ABORTED;
 517 }
 518
 519
 520 LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
 521   return new(zone()) LUnallocated(LUnallocated::FIXED_REGISTER,
 522                                   Register::ToAllocationIndex(reg));
 523 }
 524
 525
 526 LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) {
 527   return new(zone()) LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER,
 528                                   XMMRegister::ToAllocationIndex(reg));
 529 }
 530
 531
 532 LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
 533   return Use(value, ToUnallocated(fixed_register));
 534 }
 535
 536
 537 LOperand* LChunkBuilder::UseFixedDouble(HValue* value, XMMRegister reg) {
 538   return Use(value, ToUnallocated(reg));
 539 }
 540
 541
 542 LOperand* LChunkBuilder::UseRegister(HValue* value) {
 543   return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
 544 }
 545
 546
 547 LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
 548   return Use(value,
 549              new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
 550                                       LUnallocated::USED_AT_START));
 551 }
 552
 553
 554 LOperand* LChunkBuilder::UseTempRegister(HValue* value) {
 555   return Use(value, new(zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER));
 556 }
 557
 558
 559 LOperand* LChunkBuilder::Use(HValue* value) {
 560   return Use(value, new(zone()) LUnallocated(LUnallocated::NONE));
 561 }
 562
 563
 564 LOperand* LChunkBuilder::UseAtStart(HValue* value) {
 565   return Use(value, new(zone()) LUnallocated(LUnallocated::NONE,
 566                                              LUnallocated::USED_AT_START));
 567 }
 568
 569
 570 static inline bool CanBeImmediateConstant(HValue* value) {
 571   return value->IsConstant() && HConstant::cast(value)->NotInNewSpace();
 572 }
 573
 574
 575 LOperand* LChunkBuilder::UseOrConstant(HValue* value) {
 576   return CanBeImmediateConstant(value)
 577       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 578       : Use(value);
 579 }
 580
 581
 582 LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) {
 583   return CanBeImmediateConstant(value)
 584       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 585       : UseAtStart(value);
 586 }
 587
 588
 589 LOperand* LChunkBuilder::UseFixedOrConstant(HValue* value,
 590                                             Register fixed_register) {
 591   return CanBeImmediateConstant(value)
 592       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 593       : UseFixed(value, fixed_register);
 594 }
 595
 596
 597 LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
 598   return CanBeImmediateConstant(value)
 599       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 600       : UseRegister(value);
 601 }
 602
 603
 604 LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
 605   return CanBeImmediateConstant(value)
 606       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 607       : UseRegisterAtStart(value);
 608 }
 609
 610
 611 LOperand* LChunkBuilder::UseConstant(HValue* value) {
 612   return chunk_->DefineConstantOperand(HConstant::cast(value));
 613 }
 614
 615
 616 LOperand* LChunkBuilder::UseAny(HValue* value) {
 617   return value->IsConstant()
 618       ? chunk_->DefineConstantOperand(HConstant::cast(value))
 619       :  Use(value, new(zone()) LUnallocated(LUnallocated::ANY));
 620 }
 621
 622
 623 LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
 624   if (value->EmitAtUses()) {
 625     HInstruction* instr = HInstruction::cast(value);
 626     VisitInstruction(instr);
 627   }
 628   operand->set_virtual_register(value->id());
 629   return operand;
 630 }
 631
 632
 633 LInstruction* LChunkBuilder::Define(LTemplateResultInstruction<1>* instr,
 634                                     LUnallocated* result) {
 635   result->set_virtual_register(current_instruction_->id());
 636   instr->set_result(result);
 637   return instr;
 638 }
 639
 640
 641 LInstruction* LChunkBuilder::DefineAsRegister(
 642     LTemplateResultInstruction<1>* instr) {
 643   return Define(instr,
 644                 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
 645 }
 646
 647
 648 LInstruction* LChunkBuilder::DefineAsSpilled(
 649     LTemplateResultInstruction<1>* instr,
 650     int index) {
 651   return Define(instr,
 652                 new(zone()) LUnallocated(LUnallocated::FIXED_SLOT, index));
 653 }
 654
 655
 656 LInstruction* LChunkBuilder::DefineSameAsFirst(
 657     LTemplateResultInstruction<1>* instr) {
 658   return Define(instr,
 659                 new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
 660 }
 661
 662
 663 LInstruction* LChunkBuilder::DefineFixed(LTemplateResultInstruction<1>* instr,
 664                                          Register reg) {
 665   return Define(instr, ToUnallocated(reg));
 666 }
 667
 668
 669 LInstruction* LChunkBuilder::DefineFixedDouble(
 670     LTemplateResultInstruction<1>* instr,
 671     XMMRegister reg) {
 672   return Define(instr, ToUnallocated(reg));
 673 }
 674
 675
 676 LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
 677   HEnvironment* hydrogen_env = current_block_->last_environment();
 678   int argument_index_accumulator = 0;
 679   ZoneList<HValue*> objects_to_materialize(0, zone());
 680   instr->set_environment(CreateEnvironment(hydrogen_env,
 681                                            &argument_index_accumulator,
 682                                            &objects_to_materialize));
 683   return instr;
 684 }
 685
 686
 687 LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr,
 688                                         HInstruction* hinstr,
 689                                         CanDeoptimize can_deoptimize) {
 690   info()->MarkAsNonDeferredCalling();
 691
 692 #ifdef DEBUG
 693   instr->VerifyCall();
 694 #endif
 695   instr->MarkAsCall();
 696   instr = AssignPointerMap(instr);
 697
 698   // If instruction does not have side-effects lazy deoptimization
 699   // after the call will try to deoptimize to the point before the call.
 700   // Thus we still need to attach environment to this call even if
 701   // call sequence can not deoptimize eagerly.
 702   bool needs_environment =
 703       (can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) ||
 704       !hinstr->HasObservableSideEffects();
 705   if (needs_environment && !instr->HasEnvironment()) {
 706     instr = AssignEnvironment(instr);
 707   }
 708
 709   return instr;
 710 }
 711
 712
 713 LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
 714   ASSERT(!instr->HasPointerMap());
 715   instr->set_pointer_map(new(zone()) LPointerMap(zone()));
 716   return instr;
 717 }
 718
 719
 720 LUnallocated* LChunkBuilder::TempRegister() {
 721   LUnallocated* operand =
 722       new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
 723   int vreg = allocator_->GetVirtualRegister();
 724   if (!allocator_->AllocationOk()) {
 725     Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
 726     vreg = 0;
 727   }
 728   operand->set_virtual_register(vreg);
 729   return operand;
 730 }
 731
 732
 733 LOperand* LChunkBuilder::FixedTemp(Register reg) {
 734   LUnallocated* operand = ToUnallocated(reg);
 735   ASSERT(operand->HasFixedPolicy());
 736   return operand;
 737 }
 738
 739
 740 LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) {
 741   LUnallocated* operand = ToUnallocated(reg);
 742   ASSERT(operand->HasFixedPolicy());
 743   return operand;
 744 }
 745
 746
 747 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
 748   return new(zone()) LLabel(instr->block());
 749 }
 750
 751
 752 LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
 753   return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
 754 }
 755
 756
 757 LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) {
 758   UNREACHABLE();
 759   return NULL;
 760 }
 761
 762
 763 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
 764   return AssignEnvironment(new(zone()) LDeoptimize);
 765 }
 766
 767
 768 LInstruction* LChunkBuilder::DoShift(Token::Value op,
 769                                      HBitwiseBinaryOperation* instr) {
 770   if (instr->representation().IsSmiOrInteger32()) {
 771     ASSERT(instr->left()->representation().Equals(instr->representation()));
 772     ASSERT(instr->right()->representation().Equals(instr->representation()));
 773     LOperand* left = UseRegisterAtStart(instr->left());
 774
 775     HValue* right_value = instr->right();
 776     LOperand* right = NULL;
 777     int constant_value = 0;
 778     bool does_deopt = false;
 779     if (right_value->IsConstant()) {
 780       HConstant* constant = HConstant::cast(right_value);
 781       right = chunk_->DefineConstantOperand(constant);
 782       constant_value = constant->Integer32Value() & 0x1f;
 783       // Left shifts can deoptimize if we shift by > 0 and the result cannot be
 784       // truncated to smi.
 785       if (instr->representation().IsSmi() && constant_value > 0) {
 786         does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi);
 787       }
 788     } else {
 789       right = UseFixed(right_value, ecx);
 790     }
 791
 792     // Shift operations can only deoptimize if we do a logical shift by 0 and
 793     // the result cannot be truncated to int32.
 794     if (op == Token::SHR && constant_value == 0) {
 795       if (FLAG_opt_safe_uint32_operations) {
 796         does_deopt = !instr->CheckFlag(HInstruction::kUint32);
 797       } else {
 798         does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToInt32);
 799       }
 800     }
 801
 802     LInstruction* result =
 803         DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt));
 804     return does_deopt ? AssignEnvironment(result) : result;
 805   } else {
 806     return DoArithmeticT(op, instr);
 807   }
 808 }
 809
 810
 811 LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
 812                                            HArithmeticBinaryOperation* instr) {
 813   ASSERT(instr->representation().IsDouble());
 814   ASSERT(instr->left()->representation().IsDouble());
 815   ASSERT(instr->right()->representation().IsDouble());
 816   if (op == Token::MOD) {
 817     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
 818     LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
 819     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
 820     return MarkAsCall(DefineSameAsFirst(result), instr);
 821   } else {
 822     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
 823     LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
 824     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
 825     return DefineSameAsFirst(result);
 826   }
 827 }
 828
 829
 830 LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
 831                                            HBinaryOperation* instr) {
 832   HValue* left = instr->left();
 833   HValue* right = instr->right();
 834   ASSERT(left->representation().IsTagged());
 835   ASSERT(right->representation().IsTagged());
 836   LOperand* context = UseFixed(instr->context(), esi);
 837   LOperand* left_operand = UseFixed(left, edx);
 838   LOperand* right_operand = UseFixed(right, eax);
 839   LArithmeticT* result =
 840       new(zone()) LArithmeticT(op, context, left_operand, right_operand);
 841   return MarkAsCall(DefineFixed(result, eax), instr);
 842 }
 843
 844
 845 void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) {
 846   ASSERT(is_building());
 847   current_block_ = block;
 848   next_block_ = next_block;
 849   if (block->IsStartBlock()) {
 850     block->UpdateEnvironment(graph_->start_environment());
 851     argument_count_ = 0;
 852   } else if (block->predecessors()->length() == 1) {
 853     // We have a single predecessor => copy environment and outgoing
 854     // argument count from the predecessor.
 855     ASSERT(block->phis()->length() == 0);
 856     HBasicBlock* pred = block->predecessors()->at(0);
 857     HEnvironment* last_environment = pred->last_environment();
 858     ASSERT(last_environment != NULL);
 859     // Only copy the environment, if it is later used again.
 860     if (pred->end()->SecondSuccessor() == NULL) {
 861       ASSERT(pred->end()->FirstSuccessor() == block);
 862     } else {
 863       if (pred->end()->FirstSuccessor()->block_id() > block->block_id() ||
 864           pred->end()->SecondSuccessor()->block_id() > block->block_id()) {
 865         last_environment = last_environment->Copy();
 866       }
 867     }
 868     block->UpdateEnvironment(last_environment);
 869     ASSERT(pred->argument_count() >= 0);
 870     argument_count_ = pred->argument_count();
 871   } else {
 872     // We are at a state join => process phis.
 873     HBasicBlock* pred = block->predecessors()->at(0);
 874     // No need to copy the environment, it cannot be used later.
 875     HEnvironment* last_environment = pred->last_environment();
 876     for (int i = 0; i < block->phis()->length(); ++i) {
 877       HPhi* phi = block->phis()->at(i);
 878       if (phi->HasMergedIndex()) {
 879         last_environment->SetValueAt(phi->merged_index(), phi);
 880       }
 881     }
 882     for (int i = 0; i < block->deleted_phis()->length(); ++i) {
 883       if (block->deleted_phis()->at(i) < last_environment->length()) {
 884         last_environment->SetValueAt(block->deleted_phis()->at(i),
 885                                      graph_->GetConstantUndefined());
 886       }
 887     }
 888     block->UpdateEnvironment(last_environment);
 889     // Pick up the outgoing argument count of one of the predecessors.
 890     argument_count_ = pred->argument_count();
 891   }
 892   HInstruction* current = block->first();
 893   int start = chunk_->instructions()->length();
 894   while (current != NULL && !is_aborted()) {
 895     // Code for constants in registers is generated lazily.
 896     if (!current->EmitAtUses()) {
 897       VisitInstruction(current);
 898     }
 899     current = current->next();
 900   }
 901   int end = chunk_->instructions()->length() - 1;
 902   if (end >= start) {
 903     block->set_first_instruction_index(start);
 904     block->set_last_instruction_index(end);
 905   }
 906   block->set_argument_count(argument_count_);
 907   next_block_ = NULL;
 908   current_block_ = NULL;
 909 }
 910
 911
 912 void LChunkBuilder::VisitInstruction(HInstruction* current) {
 913   HInstruction* old_current = current_instruction_;
 914   current_instruction_ = current;
 915
 916   LInstruction* instr = NULL;
 917   if (current->CanReplaceWithDummyUses()) {
 918     if (current->OperandCount() == 0) {
 919       instr = DefineAsRegister(new(zone()) LDummy());
 920     } else {
 921       ASSERT(!current->OperandAt(0)->IsControlInstruction());
 922       instr = DefineAsRegister(new(zone())
 923           LDummyUse(UseAny(current->OperandAt(0))));
 924     }
 925     for (int i = 1; i < current->OperandCount(); ++i) {
 926       if (current->OperandAt(i)->IsControlInstruction()) continue;
 927       LInstruction* dummy =
 928           new(zone()) LDummyUse(UseAny(current->OperandAt(i)));
 929       dummy->set_hydrogen_value(current);
 930       chunk_->AddInstruction(dummy, current_block_);
 931     }
 932   } else {
 933     instr = current->CompileToLithium(this);
 934   }
 935
 936   argument_count_ += current->argument_delta();
 937   ASSERT(argument_count_ >= 0);
 938
 939   if (instr != NULL) {
 940     // Associate the hydrogen instruction first, since we may need it for
 941     // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below.
 942     instr->set_hydrogen_value(current);
 943
 944 #if DEBUG
 945     // Make sure that the lithium instruction has either no fixed register
 946     // constraints in temps or the result OR no uses that are only used at
 947     // start. If this invariant doesn't hold, the register allocator can decide
 948     // to insert a split of a range immediately before the instruction due to an
 949     // already allocated register needing to be used for the instruction's fixed
 950     // register constraint. In this case, The register allocator won't see an
 951     // interference between the split child and the use-at-start (it would if
 952     // the it was just a plain use), so it is free to move the split child into
 953     // the same register that is used for the use-at-start.
 954     // See https://code.google.com/p/chromium/issues/detail?id=201590
 955     if (!(instr->ClobbersRegisters() && instr->ClobbersDoubleRegisters())) {
 956       int fixed = 0;
 957       int used_at_start = 0;
 958       for (UseIterator it(instr); !it.Done(); it.Advance()) {
 959         LUnallocated* operand = LUnallocated::cast(it.Current());
 960         if (operand->IsUsedAtStart()) ++used_at_start;
 961       }
 962       if (instr->Output() != NULL) {
 963         if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed;
 964       }
 965       for (TempIterator it(instr); !it.Done(); it.Advance()) {
 966         LUnallocated* operand = LUnallocated::cast(it.Current());
 967         if (operand->HasFixedPolicy()) ++fixed;
 968       }
 969       ASSERT(fixed == 0 || used_at_start == 0);
 970     }
 971 #endif
 972
 973     if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
 974       instr = AssignPointerMap(instr);
 975     }
 976     if (FLAG_stress_environments && !instr->HasEnvironment()) {
 977       instr = AssignEnvironment(instr);
 978     }
 979     if (!CpuFeatures::IsSafeForSnapshot(SSE2) && instr->IsGoto() &&
 980         LGoto::cast(instr)->jumps_to_join()) {
 981       // TODO(olivf) Since phis of spilled values are joined as registers
 982       // (not in the stack slot), we need to allow the goto gaps to keep one
 983       // x87 register alive. To ensure all other values are still spilled, we
 984       // insert a fpu register barrier right before.
 985       LClobberDoubles* clobber = new(zone()) LClobberDoubles();
 986       clobber->set_hydrogen_value(current);
 987       chunk_->AddInstruction(clobber, current_block_);
 988     }
 989     chunk_->AddInstruction(instr, current_block_);
 990
 991     if (instr->IsCall()) {
 992       HValue* hydrogen_value_for_lazy_bailout = current;
 993       LInstruction* instruction_needing_environment = NULL;
 994       if (current->HasObservableSideEffects()) {
 995         HSimulate* sim = HSimulate::cast(current->next());
 996         instruction_needing_environment = instr;
 997         sim->ReplayEnvironment(current_block_->last_environment());
 998         hydrogen_value_for_lazy_bailout = sim;
 999       }
1000       LInstruction* bailout = AssignEnvironment(new(zone()) LLazyBailout());
1001       bailout->set_hydrogen_value(hydrogen_value_for_lazy_bailout);
1002       chunk_->AddInstruction(bailout, current_block_);
1003       if (instruction_needing_environment != NULL) {
1004         // Store the lazy deopt environment with the instruction if needed.
1005         // Right now it is only used for LInstanceOfKnownGlobal.
1006         instruction_needing_environment->
1007             SetDeferredLazyDeoptimizationEnvironment(bailout->environment());
1008       }
1009     }
1010   }
1011   current_instruction_ = old_current;
1012 }
1013
1014
1015 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
1016   return new(zone()) LGoto(instr->FirstSuccessor());
1017 }
1018
1019
1020 LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
1021   LInstruction* goto_instr = CheckElideControlInstruction(instr);
1022   if (goto_instr != NULL) return goto_instr;
1023
1024   HValue* value = instr->value();
1025   Representation r = value->representation();
1026   HType type = value->type();
1027   ToBooleanStub::Types expected = instr->expected_input_types();
1028   if (expected.IsEmpty()) expected = ToBooleanStub::Types::Generic();
1029
1030   bool easy_case = !r.IsTagged() || type.IsBoolean() || type.IsSmi() ||
1031       type.IsJSArray() || type.IsHeapNumber() || type.IsString();
1032   LOperand* temp = !easy_case && expected.NeedsMap() ? TempRegister() : NULL;
1033   LInstruction* branch = new(zone()) LBranch(UseRegister(value), temp);
1034   if (!easy_case &&
1035       ((!expected.Contains(ToBooleanStub::SMI) && expected.NeedsMap()) ||
1036        !expected.IsGeneric())) {
1037     branch = AssignEnvironment(branch);
1038   }
1039   return branch;
1040 }
1041
1042
1043 LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) {
1044   return new(zone()) LDebugBreak();
1045 }
1046
1047
1048 LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {
1049   LInstruction* goto_instr = CheckElideControlInstruction(instr);
1050   if (goto_instr != NULL) return goto_instr;
1051
1052   ASSERT(instr->value()->representation().IsTagged());
1053   LOperand* value = UseRegisterAtStart(instr->value());
1054   return new(zone()) LCmpMapAndBranch(value);
1055 }
1056
1057
1058 LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
1059   info()->MarkAsRequiresFrame();
1060   return DefineAsRegister(new(zone()) LArgumentsLength(Use(length->value())));
1061 }
1062
1063
1064 LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
1065   info()->MarkAsRequiresFrame();
1066   return DefineAsRegister(new(zone()) LArgumentsElements);
1067 }
1068
1069
1070 LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
1071   LOperand* left = UseFixed(instr->left(), InstanceofStub::left());
1072   LOperand* right = UseFixed(instr->right(), InstanceofStub::right());
1073   LOperand* context = UseFixed(instr->context(), esi);
1074   LInstanceOf* result = new(zone()) LInstanceOf(context, left, right);
1075   return MarkAsCall(DefineFixed(result, eax), instr);
1076 }
1077
1078
1079 LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
1080     HInstanceOfKnownGlobal* instr) {
1081   LInstanceOfKnownGlobal* result =
1082       new(zone()) LInstanceOfKnownGlobal(
1083           UseFixed(instr->context(), esi),
1084           UseFixed(instr->left(), InstanceofStub::left()),
1085           FixedTemp(edi));
1086   return MarkAsCall(DefineFixed(result, eax), instr);
1087 }
1088
1089
1090 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
1091   LOperand* receiver = UseRegister(instr->receiver());
1092   LOperand* function = UseRegister(instr->function());
1093   LOperand* temp = TempRegister();
1094   LWrapReceiver* result =
1095       new(zone()) LWrapReceiver(receiver, function, temp);
1096   return AssignEnvironment(DefineSameAsFirst(result));
1097 }
1098
1099
1100 LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
1101   LOperand* function = UseFixed(instr->function(), edi);
1102   LOperand* receiver = UseFixed(instr->receiver(), eax);
1103   LOperand* length = UseFixed(instr->length(), ebx);
1104   LOperand* elements = UseFixed(instr->elements(), ecx);
1105   LApplyArguments* result = new(zone()) LApplyArguments(function,
1106                                                         receiver,
1107                                                         length,
1108                                                         elements);
1109   return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
1110 }
1111
1112
1113 LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
1114   LOperand* argument = UseAny(instr->argument());
1115   return new(zone()) LPushArgument(argument);
1116 }
1117
1118
1119 LInstruction* LChunkBuilder::DoStoreCodeEntry(
1120     HStoreCodeEntry* store_code_entry) {
1121   LOperand* function = UseRegister(store_code_entry->function());
1122   LOperand* code_object = UseTempRegister(store_code_entry->code_object());
1123   return new(zone()) LStoreCodeEntry(function, code_object);
1124 }
1125
1126
1127 LInstruction* LChunkBuilder::DoInnerAllocatedObject(
1128     HInnerAllocatedObject* instr) {
1129   LOperand* base_object = UseRegisterAtStart(instr->base_object());
1130   LOperand* offset = UseRegisterOrConstantAtStart(instr->offset());
1131   return DefineAsRegister(
1132       new(zone()) LInnerAllocatedObject(base_object, offset));
1133 }
1134
1135
1136 LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
1137   return instr->HasNoUses()
1138       ? NULL
1139       : DefineAsRegister(new(zone()) LThisFunction);
1140 }
1141
1142
1143 LInstruction* LChunkBuilder::DoContext(HContext* instr) {
1144   if (instr->HasNoUses()) return NULL;
1145
1146   if (info()->IsStub()) {
1147     return DefineFixed(new(zone()) LContext, esi);
1148   }
1149
1150   return DefineAsRegister(new(zone()) LContext);
1151 }
1152
1153
1154 LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
1155   LOperand* context = UseFixed(instr->context(), esi);
1156   return MarkAsCall(new(zone()) LDeclareGlobals(context), instr);
1157 }
1158
1159
1160 LInstruction* LChunkBuilder::DoCallJSFunction(
1161     HCallJSFunction* instr) {
1162   LOperand* function = UseFixed(instr->function(), edi);
1163
1164   LCallJSFunction* result = new(zone()) LCallJSFunction(function);
1165
1166   return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
1167 }
1168
1169
1170 LInstruction* LChunkBuilder::DoCallWithDescriptor(
1171     HCallWithDescriptor* instr) {
1172   const CallInterfaceDescriptor* descriptor = instr->descriptor();
1173
1174   LOperand* target = UseRegisterOrConstantAtStart(instr->target());
1175   ZoneList<LOperand*> ops(instr->OperandCount(), zone());
1176   ops.Add(target, zone());
1177   for (int i = 1; i < instr->OperandCount(); i++) {
1178     LOperand* op = UseFixed(instr->OperandAt(i),
1179         descriptor->GetParameterRegister(i - 1));
1180     ops.Add(op, zone());
1181   }
1182
1183   LCallWithDescriptor* result = new(zone()) LCallWithDescriptor(
1184       descriptor, ops, zone());
1185   return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
1186 }
1187
1188
1189 LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
1190   LOperand* context = UseFixed(instr->context(), esi);
1191   LOperand* function = UseFixed(instr->function(), edi);
1192   LInvokeFunction* result = new(zone()) LInvokeFunction(context, function);
1193   return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
1194 }
1195
1196
1197 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
1198   switch (instr->op()) {
1199     case kMathFloor: return DoMathFloor(instr);
1200     case kMathRound: return DoMathRound(instr);
1201     case kMathAbs: return DoMathAbs(instr);
1202     case kMathLog: return DoMathLog(instr);
1203     case kMathExp: return DoMathExp(instr);
1204     case kMathSqrt: return DoMathSqrt(instr);
1205     case kMathPowHalf: return DoMathPowHalf(instr);
1206     case kMathClz32: return DoMathClz32(instr);
1207     default:
1208       UNREACHABLE();
1209       return NULL;
1210   }
1211 }
1212
1213
1214 LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) {
1215   LOperand* input = UseRegisterAtStart(instr->value());
1216   LMathFloor* result = new(zone()) LMathFloor(input);
1217   return AssignEnvironment(DefineAsRegister(result));
1218 }
1219
1220
1221 LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) {
1222   LOperand* input = UseRegister(instr->value());
1223   LOperand* temp = FixedTemp(xmm4);
1224   LMathRound* result = new(zone()) LMathRound(input, temp);
1225   return AssignEnvironment(DefineAsRegister(result));
1226 }
1227
1228
1229 LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) {
1230   LOperand* context = UseAny(instr->context());  // Deferred use.
1231   LOperand* input = UseRegisterAtStart(instr->value());
1232   LInstruction* result =
1233       DefineSameAsFirst(new(zone()) LMathAbs(context, input));
1234   Representation r = instr->value()->representation();
1235   if (!r.IsDouble() && !r.IsSmiOrInteger32()) result = AssignPointerMap(result);
1236   if (!r.IsDouble()) result = AssignEnvironment(result);
1237   return result;
1238 }
1239
1240
1241 LInstruction* LChunkBuilder::DoMathLog(HUnaryMathOperation* instr) {
1242   ASSERT(instr->representation().IsDouble());
1243   ASSERT(instr->value()->representation().IsDouble());
1244   LOperand* input = UseRegisterAtStart(instr->value());
1245   return MarkAsCall(DefineSameAsFirst(new(zone()) LMathLog(input)), instr);
1246 }
1247
1248
1249 LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
1250   LOperand* input = UseRegisterAtStart(instr->value());
1251   LMathClz32* result = new(zone()) LMathClz32(input);
1252   return DefineAsRegister(result);
1253 }
1254
1255
1256 LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
1257   ASSERT(instr->representation().IsDouble());
1258   ASSERT(instr->value()->representation().IsDouble());
1259   LOperand* value = UseTempRegister(instr->value());
1260   LOperand* temp1 = TempRegister();
1261   LOperand* temp2 = TempRegister();
1262   LMathExp* result = new(zone()) LMathExp(value, temp1, temp2);
1263   return DefineAsRegister(result);
1264 }
1265
1266
1267 LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) {
1268   LOperand* input = UseRegisterAtStart(instr->value());
1269   LMathSqrt* result = new(zone()) LMathSqrt(input);
1270   return DefineSameAsFirst(result);
1271 }
1272
1273
1274 LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) {
1275   LOperand* input = UseRegisterAtStart(instr->value());
1276   LOperand* temp = TempRegister();
1277   LMathPowHalf* result = new(zone()) LMathPowHalf(input, temp);
1278   return DefineSameAsFirst(result);
1279 }
1280
1281
1282 LInstruction* LChunkBuilder::DoCallNew(HCallNew* instr) {
1283   LOperand* context = UseFixed(instr->context(), esi);
1284   LOperand* constructor = UseFixed(instr->constructor(), edi);
1285   LCallNew* result = new(zone()) LCallNew(context, constructor);
1286   return MarkAsCall(DefineFixed(result, eax), instr);
1287 }
1288
1289
1290 LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
1291   LOperand* context = UseFixed(instr->context(), esi);
1292   LOperand* constructor = UseFixed(instr->constructor(), edi);
1293   LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
1294   return MarkAsCall(DefineFixed(result, eax), instr);
1295 }
1296
1297
1298 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
1299   LOperand* context = UseFixed(instr->context(), esi);
1300   LOperand* function = UseFixed(instr->function(), edi);
1301   LCallFunction* call = new(zone()) LCallFunction(context, function);
1302   return MarkAsCall(DefineFixed(call, eax), instr);
1303 }
1304
1305
1306 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
1307   LOperand* context = UseFixed(instr->context(), esi);
1308   return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
1309 }
1310
1311
1312 LInstruction* LChunkBuilder::DoRor(HRor* instr) {
1313   return DoShift(Token::ROR, instr);
1314 }
1315
1316
1317 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
1318   return DoShift(Token::SHR, instr);
1319 }
1320
1321
1322 LInstruction* LChunkBuilder::DoSar(HSar* instr) {
1323   return DoShift(Token::SAR, instr);
1324 }
1325
1326
1327 LInstruction* LChunkBuilder::DoShl(HShl* instr) {
1328   return DoShift(Token::SHL, instr);
1329 }
1330
1331
1332 LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
1333   if (instr->representation().IsSmiOrInteger32()) {
1334     ASSERT(instr->left()->representation().Equals(instr->representation()));
1335     ASSERT(instr->right()->representation().Equals(instr->representation()));
1336     ASSERT(instr->CheckFlag(HValue::kTruncatingToInt32));
1337
1338     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
1339     LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand());
1340     return DefineSameAsFirst(new(zone()) LBitI(left, right));
1341   } else {
1342     return DoArithmeticT(instr->op(), instr);
1343   }
1344 }
1345
1346
1347 LInstruction* LChunkBuilder::DoDivByPowerOf2I(HDiv* instr) {
1348   ASSERT(instr->representation().IsSmiOrInteger32());
1349   ASSERT(instr->left()->representation().Equals(instr->representation()));
1350   ASSERT(instr->right()->representation().Equals(instr->representation()));
1351   LOperand* dividend = UseRegister(instr->left());
1352   int32_t divisor = instr->right()->GetInteger32Constant();
1353   LInstruction* result = DefineAsRegister(new(zone()) LDivByPowerOf2I(
1354           dividend, divisor));
1355   if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1356       (instr->CheckFlag(HValue::kCanOverflow) && divisor == -1) ||
1357       (!instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) &&
1358        divisor != 1 && divisor != -1)) {
1359     result = AssignEnvironment(result);
1360   }
1361   return result;
1362 }
1363
1364
1365 LInstruction* LChunkBuilder::DoDivByConstI(HDiv* instr) {
1366   ASSERT(instr->representation().IsInteger32());
1367   ASSERT(instr->left()->representation().Equals(instr->representation()));
1368   ASSERT(instr->right()->representation().Equals(instr->representation()));
1369   LOperand* dividend = UseRegister(instr->left());
1370   int32_t divisor = instr->right()->GetInteger32Constant();
1371   LOperand* temp1 = FixedTemp(eax);
1372   LOperand* temp2 = FixedTemp(edx);
1373   LInstruction* result = DefineFixed(new(zone()) LDivByConstI(
1374           dividend, divisor, temp1, temp2), edx);
1375   if (divisor == 0 ||
1376       (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1377       !instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
1378     result = AssignEnvironment(result);
1379   }
1380   return result;
1381 }
1382
1383
1384 LInstruction* LChunkBuilder::DoDivI(HBinaryOperation* instr) {
1385   ASSERT(instr->representation().IsSmiOrInteger32());
1386   ASSERT(instr->left()->representation().Equals(instr->representation()));
1387   ASSERT(instr->right()->representation().Equals(instr->representation()));
1388   LOperand* dividend = UseFixed(instr->left(), eax);
1389   LOperand* divisor = UseRegister(instr->right());
1390   LOperand* temp = FixedTemp(edx);
1391   LInstruction* result = DefineFixed(new(zone()) LDivI(
1392           dividend, divisor, temp), eax);
1393   if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
1394       instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
1395       instr->CheckFlag(HValue::kCanOverflow) ||
1396       (!instr->IsMathFloorOfDiv() &&
1397        !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) {
1398     result = AssignEnvironment(result);
1399   }
1400   return result;
1401 }
1402
1403
1404 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
1405   if (instr->representation().IsSmiOrInteger32()) {
1406     if (instr->RightIsPowerOf2()) {
1407       return DoDivByPowerOf2I(instr);
1408     } else if (instr->right()->IsConstant()) {
1409       return DoDivByConstI(instr);
1410     } else {
1411       return DoDivI(instr);
1412     }
1413   } else if (instr->representation().IsDouble()) {
1414     return DoArithmeticD(Token::DIV, instr);
1415   } else {
1416     return DoArithmeticT(Token::DIV, instr);
1417   }
1418 }
1419
1420
1421 LInstruction* LChunkBuilder::DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr) {
1422   LOperand* dividend = UseRegisterAtStart(instr->left());
1423   int32_t divisor = instr->right()->GetInteger32Constant();
1424   LInstruction* result = DefineSameAsFirst(new(zone()) LFlooringDivByPowerOf2I(
1425           dividend, divisor));
1426   if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1427       (instr->CheckFlag(HValue::kLeftCanBeMinInt) && divisor == -1)) {
1428     result = AssignEnvironment(result);
1429   }
1430   return result;
1431 }
1432
1433
1434 LInstruction* LChunkBuilder::DoFlooringDivByConstI(HMathFloorOfDiv* instr) {
1435   ASSERT(instr->representation().IsInteger32());
1436   ASSERT(instr->left()->representation().Equals(instr->representation()));
1437   ASSERT(instr->right()->representation().Equals(instr->representation()));
1438   LOperand* dividend = UseRegister(instr->left());
1439   int32_t divisor = instr->right()->GetInteger32Constant();
1440   LOperand* temp1 = FixedTemp(eax);
1441   LOperand* temp2 = FixedTemp(edx);
1442   LOperand* temp3 =
1443       ((divisor > 0 && !instr->CheckFlag(HValue::kLeftCanBeNegative)) ||
1444        (divisor < 0 && !instr->CheckFlag(HValue::kLeftCanBePositive))) ?
1445       NULL : TempRegister();
1446   LInstruction* result =
1447       DefineFixed(new(zone()) LFlooringDivByConstI(dividend,
1448                                                    divisor,
1449                                                    temp1,
1450                                                    temp2,
1451                                                    temp3),
1452                   edx);
1453   if (divisor == 0 ||
1454       (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0)) {
1455     result = AssignEnvironment(result);
1456   }
1457   return result;
1458 }
1459
1460
1461 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
1462   if (instr->RightIsPowerOf2()) {
1463     return DoFlooringDivByPowerOf2I(instr);
1464   } else if (instr->right()->IsConstant()) {
1465     return DoFlooringDivByConstI(instr);
1466   } else {
1467     return DoDivI(instr);
1468   }
1469 }
1470
1471
1472 LInstruction* LChunkBuilder::DoModByPowerOf2I(HMod* instr) {
1473   ASSERT(instr->representation().IsSmiOrInteger32());
1474   ASSERT(instr->left()->representation().Equals(instr->representation()));
1475   ASSERT(instr->right()->representation().Equals(instr->representation()));
1476   LOperand* dividend = UseRegisterAtStart(instr->left());
1477   int32_t divisor = instr->right()->GetInteger32Constant();
1478   LInstruction* result = DefineSameAsFirst(new(zone()) LModByPowerOf2I(
1479           dividend, divisor));
1480   if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1481     result = AssignEnvironment(result);
1482   }
1483   return result;
1484 }
1485
1486
1487 LInstruction* LChunkBuilder::DoModByConstI(HMod* instr) {
1488   ASSERT(instr->representation().IsSmiOrInteger32());
1489   ASSERT(instr->left()->representation().Equals(instr->representation()));
1490   ASSERT(instr->right()->representation().Equals(instr->representation()));
1491   LOperand* dividend = UseRegister(instr->left());
1492   int32_t divisor = instr->right()->GetInteger32Constant();
1493   LOperand* temp1 = FixedTemp(eax);
1494   LOperand* temp2 = FixedTemp(edx);
1495   LInstruction* result = DefineFixed(new(zone()) LModByConstI(
1496           dividend, divisor, temp1, temp2), eax);
1497   if (divisor == 0 || instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1498     result = AssignEnvironment(result);
1499   }
1500   return result;
1501 }
1502
1503
1504 LInstruction* LChunkBuilder::DoModI(HMod* instr) {
1505   ASSERT(instr->representation().IsSmiOrInteger32());
1506   ASSERT(instr->left()->representation().Equals(instr->representation()));
1507   ASSERT(instr->right()->representation().Equals(instr->representation()));
1508   LOperand* dividend = UseFixed(instr->left(), eax);
1509   LOperand* divisor = UseRegister(instr->right());
1510   LOperand* temp = FixedTemp(edx);
1511   LInstruction* result = DefineFixed(new(zone()) LModI(
1512           dividend, divisor, temp), edx);
1513   if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
1514       instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1515     result = AssignEnvironment(result);
1516   }
1517   return result;
1518 }
1519
1520
1521 LInstruction* LChunkBuilder::DoMod(HMod* instr) {
1522   if (instr->representation().IsSmiOrInteger32()) {
1523     if (instr->RightIsPowerOf2()) {
1524       return DoModByPowerOf2I(instr);
1525     } else if (instr->right()->IsConstant()) {
1526       return DoModByConstI(instr);
1527     } else {
1528       return DoModI(instr);
1529     }
1530   } else if (instr->representation().IsDouble()) {
1531     return DoArithmeticD(Token::MOD, instr);
1532   } else {
1533     return DoArithmeticT(Token::MOD, instr);
1534   }
1535 }
1536
1537
1538 LInstruction* LChunkBuilder::DoMul(HMul* instr) {
1539   if (instr->representation().IsSmiOrInteger32()) {
1540     ASSERT(instr->left()->representation().Equals(instr->representation()));
1541     ASSERT(instr->right()->representation().Equals(instr->representation()));
1542     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
1543     LOperand* right = UseOrConstant(instr->BetterRightOperand());
1544     LOperand* temp = NULL;
1545     if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1546       temp = TempRegister();
1547     }
1548     LMulI* mul = new(zone()) LMulI(left, right, temp);
1549     if (instr->CheckFlag(HValue::kCanOverflow) ||
1550         instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1551       AssignEnvironment(mul);
1552     }
1553     return DefineSameAsFirst(mul);
1554   } else if (instr->representation().IsDouble()) {
1555     return DoArithmeticD(Token::MUL, instr);
1556   } else {
1557     return DoArithmeticT(Token::MUL, instr);
1558   }
1559 }
1560
1561
1562 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
1563   if (instr->representation().IsSmiOrInteger32()) {
1564     ASSERT(instr->left()->representation().Equals(instr->representation()));
1565     ASSERT(instr->right()->representation().Equals(instr->representation()));
1566     LOperand* left = UseRegisterAtStart(instr->left());
1567     LOperand* right = UseOrConstantAtStart(instr->right());
1568     LSubI* sub = new(zone()) LSubI(left, right);
1569     LInstruction* result = DefineSameAsFirst(sub);
1570     if (instr->CheckFlag(HValue::kCanOverflow)) {
1571       result = AssignEnvironment(result);
1572     }
1573     return result;
1574   } else if (instr->representation().IsDouble()) {
1575     return DoArithmeticD(Token::SUB, instr);
1576   } else {
1577     return DoArithmeticT(Token::SUB, instr);
1578   }
1579 }
1580
1581
1582 LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
1583   if (instr->representation().IsSmiOrInteger32()) {
1584     ASSERT(instr->left()->representation().Equals(instr->representation()));
1585     ASSERT(instr->right()->representation().Equals(instr->representation()));
1586     // Check to see if it would be advantageous to use an lea instruction rather
1587     // than an add. This is the case when no overflow check is needed and there
1588     // are multiple uses of the add's inputs, so using a 3-register add will
1589     // preserve all input values for later uses.
1590     bool use_lea = LAddI::UseLea(instr);
1591     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
1592     HValue* right_candidate = instr->BetterRightOperand();
1593     LOperand* right = use_lea
1594         ? UseRegisterOrConstantAtStart(right_candidate)
1595         : UseOrConstantAtStart(right_candidate);
1596     LAddI* add = new(zone()) LAddI(left, right);
1597     bool can_overflow = instr->CheckFlag(HValue::kCanOverflow);
1598     LInstruction* result = use_lea
1599         ? DefineAsRegister(add)
1600         : DefineSameAsFirst(add);
1601     if (can_overflow) {
1602       result = AssignEnvironment(result);
1603     }
1604     return result;
1605   } else if (instr->representation().IsDouble()) {
1606     return DoArithmeticD(Token::ADD, instr);
1607   } else if (instr->representation().IsExternal()) {
1608     ASSERT(instr->left()->representation().IsExternal());
1609     ASSERT(instr->right()->representation().IsInteger32());
1610     ASSERT(!instr->CheckFlag(HValue::kCanOverflow));
1611     bool use_lea = LAddI::UseLea(instr);
1612     LOperand* left = UseRegisterAtStart(instr->left());
1613     HValue* right_candidate = instr->right();
1614     LOperand* right = use_lea
1615         ? UseRegisterOrConstantAtStart(right_candidate)
1616         : UseOrConstantAtStart(right_candidate);
1617     LAddI* add = new(zone()) LAddI(left, right);
1618     LInstruction* result = use_lea
1619         ? DefineAsRegister(add)
1620         : DefineSameAsFirst(add);
1621     return result;
1622   } else {
1623     return DoArithmeticT(Token::ADD, instr);
1624   }
1625 }
1626
1627
1628 LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) {
1629   LOperand* left = NULL;
1630   LOperand* right = NULL;
1631   if (instr->representation().IsSmiOrInteger32()) {
1632     ASSERT(instr->left()->representation().Equals(instr->representation()));
1633     ASSERT(instr->right()->representation().Equals(instr->representation()));
1634     left = UseRegisterAtStart(instr->BetterLeftOperand());
1635     right = UseOrConstantAtStart(instr->BetterRightOperand());
1636   } else {
1637     ASSERT(instr->representation().IsDouble());
1638     ASSERT(instr->left()->representation().IsDouble());
1639     ASSERT(instr->right()->representation().IsDouble());
1640     left = UseRegisterAtStart(instr->left());
1641     right = UseRegisterAtStart(instr->right());
1642   }
1643   LMathMinMax* minmax = new(zone()) LMathMinMax(left, right);
1644   return DefineSameAsFirst(minmax);
1645 }
1646
1647
1648 LInstruction* LChunkBuilder::DoPower(HPower* instr) {
1649   ASSERT(instr->representation().IsDouble());
1650   // We call a C function for double power. It can't trigger a GC.
1651   // We need to use fixed result register for the call.
1652   Representation exponent_type = instr->right()->representation();
1653   ASSERT(instr->left()->representation().IsDouble());
1654   LOperand* left = UseFixedDouble(instr->left(), xmm2);
1655   LOperand* right = exponent_type.IsDouble() ?
1656       UseFixedDouble(instr->right(), xmm1) :
1657       UseFixed(instr->right(), eax);
1658   LPower* result = new(zone()) LPower(left, right);
1659   return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
1660                     CAN_DEOPTIMIZE_EAGERLY);
1661 }
1662
1663
1664 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
1665   ASSERT(instr->left()->representation().IsSmiOrTagged());
1666   ASSERT(instr->right()->representation().IsSmiOrTagged());
1667   LOperand* context = UseFixed(instr->context(), esi);
1668   LOperand* left = UseFixed(instr->left(), edx);
1669   LOperand* right = UseFixed(instr->right(), eax);
1670   LCmpT* result = new(zone()) LCmpT(context, left, right);
1671   return MarkAsCall(DefineFixed(result, eax), instr);
1672 }
1673
1674
1675 LInstruction* LChunkBuilder::DoCompareNumericAndBranch(
1676     HCompareNumericAndBranch* instr) {
1677   Representation r = instr->representation();
1678   if (r.IsSmiOrInteger32()) {
1679     ASSERT(instr->left()->representation().Equals(r));
1680     ASSERT(instr->right()->representation().Equals(r));
1681     LOperand* left = UseRegisterOrConstantAtStart(instr->left());
1682     LOperand* right = UseOrConstantAtStart(instr->right());
1683     return new(zone()) LCompareNumericAndBranch(left, right);
1684   } else {
1685     ASSERT(r.IsDouble());
1686     ASSERT(instr->left()->representation().IsDouble());
1687     ASSERT(instr->right()->representation().IsDouble());
1688     LOperand* left;
1689     LOperand* right;
1690     if (CanBeImmediateConstant(instr->left()) &&
1691         CanBeImmediateConstant(instr->right())) {
1692       // The code generator requires either both inputs to be constant
1693       // operands, or neither.
1694       left = UseConstant(instr->left());
1695       right = UseConstant(instr->right());
1696     } else {
1697       left = UseRegisterAtStart(instr->left());
1698       right = UseRegisterAtStart(instr->right());
1699     }
1700     return new(zone()) LCompareNumericAndBranch(left, right);
1701   }
1702 }
1703
1704
1705 LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
1706     HCompareObjectEqAndBranch* instr) {
1707   LInstruction* goto_instr = CheckElideControlInstruction(instr);
1708   if (goto_instr != NULL) return goto_instr;
1709   LOperand* left = UseRegisterAtStart(instr->left());
1710   LOperand* right = UseOrConstantAtStart(instr->right());
1711   return new(zone()) LCmpObjectEqAndBranch(left, right);
1712 }
1713
1714
1715 LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
1716     HCompareHoleAndBranch* instr) {
1717   LOperand* value = UseRegisterAtStart(instr->value());
1718   return new(zone()) LCmpHoleAndBranch(value);
1719 }
1720
1721
1722 LInstruction* LChunkBuilder::DoCompareMinusZeroAndBranch(
1723     HCompareMinusZeroAndBranch* instr) {
1724   LInstruction* goto_instr = CheckElideControlInstruction(instr);
1725   if (goto_instr != NULL) return goto_instr;
1726   LOperand* value = UseRegister(instr->value());
1727   LOperand* scratch = TempRegister();
1728   return new(zone()) LCompareMinusZeroAndBranch(value, scratch);
1729 }
1730
1731
1732 LInstruction* LChunkBuilder::DoIsObjectAndBranch(HIsObjectAndBranch* instr) {
1733   ASSERT(instr->value()->representation().IsSmiOrTagged());
1734   LOperand* temp = TempRegister();
1735   return new(zone()) LIsObjectAndBranch(UseRegister(instr->value()), temp);
1736 }
1737
1738
1739 LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
1740   ASSERT(instr->value()->representation().IsTagged());
1741   LOperand* temp = TempRegister();
1742   return new(zone()) LIsStringAndBranch(UseRegister(instr->value()), temp);
1743 }
1744
1745
1746 LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
1747   ASSERT(instr->value()->representation().IsTagged());
1748   return new(zone()) LIsSmiAndBranch(Use(instr->value()));
1749 }
1750
1751
1752 LInstruction* LChunkBuilder::DoIsUndetectableAndBranch(
1753     HIsUndetectableAndBranch* instr) {
1754   ASSERT(instr->value()->representation().IsTagged());
1755   return new(zone()) LIsUndetectableAndBranch(
1756       UseRegisterAtStart(instr->value()), TempRegister());
1757 }
1758
1759
1760 LInstruction* LChunkBuilder::DoStringCompareAndBranch(
1761     HStringCompareAndBranch* instr) {
1762   ASSERT(instr->left()->representation().IsTagged());
1763   ASSERT(instr->right()->representation().IsTagged());
1764   LOperand* context = UseFixed(instr->context(), esi);
1765   LOperand* left = UseFixed(instr->left(), edx);
1766   LOperand* right = UseFixed(instr->right(), eax);
1767
1768   LStringCompareAndBranch* result = new(zone())
1769       LStringCompareAndBranch(context, left, right);
1770
1771   return MarkAsCall(result, instr);
1772 }
1773
1774
1775 LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
1776     HHasInstanceTypeAndBranch* instr) {
1777   ASSERT(instr->value()->representation().IsTagged());
1778   return new(zone()) LHasInstanceTypeAndBranch(
1779       UseRegisterAtStart(instr->value()),
1780       TempRegister());
1781 }
1782
1783
1784 LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
1785     HGetCachedArrayIndex* instr)  {
1786   ASSERT(instr->value()->representation().IsTagged());
1787   LOperand* value = UseRegisterAtStart(instr->value());
1788
1789   return DefineAsRegister(new(zone()) LGetCachedArrayIndex(value));
1790 }
1791
1792
1793 LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch(
1794     HHasCachedArrayIndexAndBranch* instr) {
1795   ASSERT(instr->value()->representation().IsTagged());
1796   return new(zone()) LHasCachedArrayIndexAndBranch(
1797       UseRegisterAtStart(instr->value()));
1798 }
1799
1800
1801 LInstruction* LChunkBuilder::DoClassOfTestAndBranch(
1802     HClassOfTestAndBranch* instr) {
1803   ASSERT(instr->value()->representation().IsTagged());
1804   return new(zone()) LClassOfTestAndBranch(UseRegister(instr->value()),
1805                                            TempRegister(),
1806                                            TempRegister());
1807 }
1808
1809
1810 LInstruction* LChunkBuilder::DoMapEnumLength(HMapEnumLength* instr) {
1811   LOperand* map = UseRegisterAtStart(instr->value());
1812   return DefineAsRegister(new(zone()) LMapEnumLength(map));
1813 }
1814
1815
1816 LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
1817   LOperand* date = UseFixed(instr->value(), eax);
1818   LDateField* result =
1819       new(zone()) LDateField(date, FixedTemp(ecx), instr->index());
1820   return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
1821 }
1822
1823
1824 LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
1825   LOperand* string = UseRegisterAtStart(instr->string());
1826   LOperand* index = UseRegisterOrConstantAtStart(instr->index());
1827   return DefineAsRegister(new(zone()) LSeqStringGetChar(string, index));
1828 }
1829
1830
1831 LOperand* LChunkBuilder::GetSeqStringSetCharOperand(HSeqStringSetChar* instr) {
1832   if (instr->encoding() == String::ONE_BYTE_ENCODING) {
1833     if (FLAG_debug_code) {
1834       return UseFixed(instr->value(), eax);
1835     } else {
1836       return UseFixedOrConstant(instr->value(), eax);
1837     }
1838   } else {
1839     if (FLAG_debug_code) {
1840       return UseRegisterAtStart(instr->value());
1841     } else {
1842       return UseRegisterOrConstantAtStart(instr->value());
1843     }
1844   }
1845 }
1846
1847
1848 LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
1849   LOperand* string = UseRegisterAtStart(instr->string());
1850   LOperand* index = FLAG_debug_code
1851       ? UseRegisterAtStart(instr->index())
1852       : UseRegisterOrConstantAtStart(instr->index());
1853   LOperand* value = GetSeqStringSetCharOperand(instr);
1854   LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), esi) : NULL;
1855   LInstruction* result = new(zone()) LSeqStringSetChar(context, string,
1856                                                        index, value);
1857   if (FLAG_debug_code) {
1858     result = MarkAsCall(result, instr);
1859   }
1860   return result;
1861 }
1862
1863
1864 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
1865   return AssignEnvironment(new(zone()) LBoundsCheck(
1866       UseRegisterOrConstantAtStart(instr->index()),
1867       UseAtStart(instr->length())));
1868 }
1869
1870
1871 LInstruction* LChunkBuilder::DoBoundsCheckBaseIndexInformation(
1872     HBoundsCheckBaseIndexInformation* instr) {
1873   UNREACHABLE();
1874   return NULL;
1875 }
1876
1877
1878 LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
1879   // The control instruction marking the end of a block that completed
1880   // abruptly (e.g., threw an exception).  There is nothing specific to do.
1881   return NULL;
1882 }
1883
1884
1885 LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
1886   return NULL;
1887 }
1888
1889
1890 LInstruction* LChunkBuilder::DoForceRepresentation(HForceRepresentation* bad) {
1891   // All HForceRepresentation instructions should be eliminated in the
1892   // representation change phase of Hydrogen.
1893   UNREACHABLE();
1894   return NULL;
1895 }
1896
1897
1898 LInstruction* LChunkBuilder::DoChange(HChange* instr) {
1899   Representation from = instr->from();
1900   Representation to = instr->to();
1901   if (from.IsSmi()) {
1902     if (to.IsTagged()) {
1903       LOperand* value = UseRegister(instr->value());
1904       return DefineSameAsFirst(new(zone()) LDummyUse(value));
1905     }
1906     from = Representation::Tagged();
1907   }
1908   // Only mark conversions that might need to allocate as calling rather than
1909   // all changes. This makes simple, non-allocating conversion not have to force
1910   // building a stack frame.
1911   if (from.IsTagged()) {
1912     if (to.IsDouble()) {
1913       LOperand* value = UseRegister(instr->value());
1914       // Temp register only necessary for minus zero check.
1915       LOperand* temp = TempRegister();
1916       LInstruction* result = DefineAsRegister(
1917           new(zone()) LNumberUntagD(value, temp));
1918       if (!instr->value()->representation().IsSmi()) {
1919         result = AssignEnvironment(result);
1920       }
1921       return result;
1922     } else if (to.IsSIMD128()) {
1923       LOperand* value = UseRegister(instr->value());
1924       LOperand* temp = TempRegister();
1925       LTaggedToSIMD128* res = new(zone()) LTaggedToSIMD128(value, temp, to);
1926       return AssignEnvironment(DefineAsRegister(res));
1927     } else if (to.IsSmi()) {
1928       HValue* val = instr->value();
1929       LOperand* value = UseRegister(val);
1930       if (val->type().IsSmi()) {
1931         return DefineSameAsFirst(new(zone()) LDummyUse(value));
1932       }
1933       return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value)));
1934     } else {
1935       ASSERT(to.IsInteger32());
1936       HValue* val = instr->value();
1937       if (val->type().IsSmi() || val->representation().IsSmi()) {
1938         LOperand* value = UseRegister(val);
1939         return DefineSameAsFirst(new(zone()) LSmiUntag(value, false));
1940       } else {
1941         bool truncating = instr->CanTruncateToInt32();
1942         LOperand* xmm_temp =
1943             (CpuFeatures::IsSafeForSnapshot(SSE2) && !truncating)
1944                 ? FixedTemp(xmm1) : NULL;
1945         LInstruction* result = DefineSameAsFirst(
1946             new(zone()) LTaggedToI(UseRegister(val), xmm_temp));
1947         if (!instr->value()->representation().IsSmi()) {
1948           // Note: Only deopts in deferred code.
1949           result = AssignEnvironment(result);
1950         }
1951         return result;
1952       }
1953     }
1954   } else if (from.IsDouble()) {
1955     if (to.IsTagged()) {
1956       info()->MarkAsDeferredCalling();
1957       LOperand* value = UseRegisterAtStart(instr->value());
1958       LOperand* temp = FLAG_inline_new ? TempRegister() : NULL;
1959
1960       // Make sure that temp and result_temp are different registers.
1961       LUnallocated* result_temp = TempRegister();
1962       LNumberTagD* result = new(zone()) LNumberTagD(value, temp);
1963       return AssignPointerMap(Define(result, result_temp));
1964     } else if (to.IsSmi()) {
1965       LOperand* value = UseRegister(instr->value());
1966       return AssignEnvironment(
1967           DefineAsRegister(new(zone()) LDoubleToSmi(value)));
1968     } else {
1969       ASSERT(to.IsInteger32());
1970       bool truncating = instr->CanTruncateToInt32();
1971       bool needs_temp = CpuFeatures::IsSafeForSnapshot(SSE2) && !truncating;
1972       LOperand* value = needs_temp ?
1973           UseTempRegister(instr->value()) : UseRegister(instr->value());
1974       LOperand* temp = needs_temp ? TempRegister() : NULL;
1975       LInstruction* result =
1976           DefineAsRegister(new(zone()) LDoubleToI(value, temp));
1977       if (!truncating) result = AssignEnvironment(result);
1978       return result;
1979     }
1980   } else if (from.IsInteger32()) {
1981     info()->MarkAsDeferredCalling();
1982     if (to.IsTagged()) {
1983       HValue* val = instr->value();
1984       LOperand* value = UseRegister(val);
1985       if (!instr->CheckFlag(HValue::kCanOverflow)) {
1986         return DefineSameAsFirst(new(zone()) LSmiTag(value));
1987       } else if (val->CheckFlag(HInstruction::kUint32)) {
1988         LOperand* temp1 = TempRegister();
1989         LOperand* temp2 = CpuFeatures::IsSupported(SSE2) ? FixedTemp(xmm1)
1990                                                          : NULL;
1991         LNumberTagU* result = new(zone()) LNumberTagU(value, temp1, temp2);
1992         return AssignPointerMap(DefineSameAsFirst(result));
1993       } else {
1994         LOperand* temp = TempRegister();
1995         LNumberTagI* result = new(zone()) LNumberTagI(value, temp);
1996         return AssignPointerMap(DefineSameAsFirst(result));
1997       }
1998     } else if (to.IsSmi()) {
1999       HValue* val = instr->value();
2000       LOperand* value = UseRegister(val);
2001       LInstruction* result = DefineSameAsFirst(new(zone()) LSmiTag(value));
2002       if (instr->CheckFlag(HValue::kCanOverflow)) {
2003         result = AssignEnvironment(result);
2004       }
2005       return result;
2006     } else {
2007       ASSERT(to.IsDouble());
2008       if (instr->value()->CheckFlag(HInstruction::kUint32)) {
2009         LOperand* temp = FixedTemp(xmm1);
2010         return DefineAsRegister(
2011             new(zone()) LUint32ToDouble(UseRegister(instr->value()), temp));
2012       } else {
2013         return DefineAsRegister(
2014             new(zone()) LInteger32ToDouble(Use(instr->value())));
2015       }
2016     }
2017   } else if (from.IsSIMD128()) {
2018     ASSERT(to.IsTagged());
2019     info()->MarkAsDeferredCalling();
2020     LOperand* value = UseRegister(instr->value());
2021     LOperand* temp = TempRegister();
2022
2023     // Make sure that temp and result_temp are different registers.
2024     LUnallocated* result_temp = TempRegister();
2025     LSIMD128ToTagged* result = new(zone()) LSIMD128ToTagged(value, temp);
2026     return AssignPointerMap(Define(result, result_temp));
2027   }
2028   UNREACHABLE();
2029   return NULL;
2030 }
2031
2032
2033 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
2034   LOperand* value = UseAtStart(instr->value());
2035   return AssignEnvironment(new(zone()) LCheckNonSmi(value));
2036 }
2037
2038
2039 LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
2040   LOperand* value = UseRegisterAtStart(instr->value());
2041   return AssignEnvironment(new(zone()) LCheckSmi(value));
2042 }
2043
2044
2045 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
2046   LOperand* value = UseRegisterAtStart(instr->value());
2047   LOperand* temp = TempRegister();
2048   LCheckInstanceType* result = new(zone()) LCheckInstanceType(value, temp);
2049   return AssignEnvironment(result);
2050 }
2051
2052
2053 LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) {
2054   // If the object is in new space, we'll emit a global cell compare and so
2055   // want the value in a register.  If the object gets promoted before we
2056   // emit code, we will still get the register but will do an immediate
2057   // compare instead of the cell compare.  This is safe.
2058   LOperand* value = instr->object_in_new_space()
2059       ? UseRegisterAtStart(instr->value()) : UseAtStart(instr->value());
2060   return AssignEnvironment(new(zone()) LCheckValue(value));
2061 }
2062
2063
2064 LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
2065   LOperand* value = NULL;
2066   if (!instr->CanOmitMapChecks()) {
2067     value = UseRegisterAtStart(instr->value());
2068     if (instr->has_migration_target()) info()->MarkAsDeferredCalling();
2069   }
2070   LCheckMaps* result = new(zone()) LCheckMaps(value);
2071   if (!instr->CanOmitMapChecks()) {
2072     // Note: Only deopts in deferred code.
2073     AssignEnvironment(result);
2074     if (instr->has_migration_target()) return AssignPointerMap(result);
2075   }
2076   return result;
2077 }
2078
2079
2080 LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
2081   HValue* value = instr->value();
2082   Representation input_rep = value->representation();
2083   if (input_rep.IsDouble()) {
2084     LOperand* reg = UseRegister(value);
2085     return DefineFixed(new(zone()) LClampDToUint8(reg), eax);
2086   } else if (input_rep.IsInteger32()) {
2087     LOperand* reg = UseFixed(value, eax);
2088     return DefineFixed(new(zone()) LClampIToUint8(reg), eax);
2089   } else {
2090     ASSERT(input_rep.IsSmiOrTagged());
2091     if (CpuFeatures::IsSupported(SSE2)) {
2092       LOperand* reg = UseFixed(value, eax);
2093       // Register allocator doesn't (yet) support allocation of double
2094       // temps. Reserve xmm1 explicitly.
2095       LOperand* temp = FixedTemp(xmm1);
2096       LClampTToUint8* result = new(zone()) LClampTToUint8(reg, temp);
2097       return AssignEnvironment(DefineFixed(result, eax));
2098     } else {
2099       LOperand* value = UseRegister(instr->value());
2100       LClampTToUint8NoSSE2* res =
2101           new(zone()) LClampTToUint8NoSSE2(value, TempRegister(),
2102                                            TempRegister(), TempRegister());
2103       return AssignEnvironment(DefineFixed(res, ecx));
2104     }
2105   }
2106 }
2107
2108
2109 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
2110   HValue* value = instr->value();
2111   ASSERT(value->representation().IsDouble());
2112   return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
2113 }
2114
2115
2116 LInstruction* LChunkBuilder::DoConstructDouble(HConstructDouble* instr) {
2117   LOperand* lo = UseRegister(instr->lo());
2118   LOperand* hi = UseRegister(instr->hi());
2119   return DefineAsRegister(new(zone()) LConstructDouble(hi, lo));
2120 }
2121
2122
2123 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
2124   LOperand* context = info()->IsStub() ? UseFixed(instr->context(), esi) : NULL;
2125   LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
2126   return new(zone()) LReturn(
2127       UseFixed(instr->value(), eax), context, parameter_count);
2128 }
2129
2130
2131 LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
2132   Representation r = instr->representation();
2133   if (r.IsSmi()) {
2134     return DefineAsRegister(new(zone()) LConstantS);
2135   } else if (r.IsInteger32()) {
2136     return DefineAsRegister(new(zone()) LConstantI);
2137   } else if (r.IsDouble()) {
2138     double value = instr->DoubleValue();
2139     bool value_is_zero = BitCast<uint64_t, double>(value) == 0;
2140     LOperand* temp = value_is_zero ? NULL : TempRegister();
2141     return DefineAsRegister(new(zone()) LConstantD(temp));
2142   } else if (r.IsExternal()) {
2143     return DefineAsRegister(new(zone()) LConstantE);
2144   } else if (r.IsTagged()) {
2145     return DefineAsRegister(new(zone()) LConstantT);
2146   } else {
2147     UNREACHABLE();
2148     return NULL;
2149   }
2150 }
2151
2152
2153 LInstruction* LChunkBuilder::DoLoadGlobalCell(HLoadGlobalCell* instr) {
2154   LLoadGlobalCell* result = new(zone()) LLoadGlobalCell;
2155   return instr->RequiresHoleCheck()
2156       ? AssignEnvironment(DefineAsRegister(result))
2157       : DefineAsRegister(result);
2158 }
2159
2160
2161 LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
2162   LOperand* context = UseFixed(instr->context(), esi);
2163   LOperand* global_object = UseFixed(instr->global_object(), edx);
2164   LLoadGlobalGeneric* result =
2165       new(zone()) LLoadGlobalGeneric(context, global_object);
2166   return MarkAsCall(DefineFixed(result, eax), instr);
2167 }
2168
2169
2170 LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
2171   LStoreGlobalCell* result =
2172       new(zone()) LStoreGlobalCell(UseRegister(instr->value()));
2173   return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
2174 }
2175
2176
2177 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
2178   LOperand* context = UseRegisterAtStart(instr->value());
2179   LInstruction* result =
2180       DefineAsRegister(new(zone()) LLoadContextSlot(context));
2181   if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
2182     result = AssignEnvironment(result);
2183   }
2184   return result;
2185 }
2186
2187
2188 LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) {
2189   LOperand* value;
2190   LOperand* temp;
2191   LOperand* context = UseRegister(instr->context());
2192   if (instr->NeedsWriteBarrier()) {
2193     value = UseTempRegister(instr->value());
2194     temp = TempRegister();
2195   } else {
2196     value = UseRegister(instr->value());
2197     temp = NULL;
2198   }
2199   LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp);
2200   if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
2201     result = AssignEnvironment(result);
2202   }
2203   return result;
2204 }
2205
2206
2207 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
2208   LOperand* obj = (instr->access().IsExternalMemory() &&
2209                    instr->access().offset() == 0)
2210       ? UseRegisterOrConstantAtStart(instr->object())
2211       : UseRegisterAtStart(instr->object());
2212   return DefineAsRegister(new(zone()) LLoadNamedField(obj));
2213 }
2214
2215
2216 LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
2217   LOperand* context = UseFixed(instr->context(), esi);
2218   LOperand* object = UseFixed(instr->object(), edx);
2219   LLoadNamedGeneric* result = new(zone()) LLoadNamedGeneric(context, object);
2220   return MarkAsCall(DefineFixed(result, eax), instr);
2221 }
2222
2223
2224 LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
2225     HLoadFunctionPrototype* instr) {
2226   return AssignEnvironment(DefineAsRegister(
2227       new(zone()) LLoadFunctionPrototype(UseRegister(instr->function()),
2228                                          TempRegister())));
2229 }
2230
2231
2232 LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
2233   return DefineAsRegister(new(zone()) LLoadRoot);
2234 }
2235
2236
2237 LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
2238   ASSERT(instr->key()->representation().IsSmiOrInteger32());
2239   ElementsKind elements_kind = instr->elements_kind();
2240   bool clobbers_key = ExternalArrayOpRequiresTemp(
2241       instr->key()->representation(), elements_kind);
2242   LOperand* key = clobbers_key
2243       ? UseTempRegister(instr->key())
2244       : UseRegisterOrConstantAtStart(instr->key());
2245   LInstruction* result = NULL;
2246
2247   bool load_128bits_without_sse2 = IsSIMD128ElementsKind(elements_kind) &&
2248                                    !CPU::SupportsSIMD128InCrankshaft();
2249   if (!instr->is_typed_elements()) {
2250     LOperand* obj = UseRegisterAtStart(instr->elements());
2251     result = DefineAsRegister(new(zone()) LLoadKeyed(obj, key, NULL));
2252   } else {
2253     ASSERT(
2254         (instr->representation().IsInteger32() &&
2255          !(IsDoubleOrFloatElementsKind(instr->elements_kind()))) ||
2256         (instr->representation().IsDouble() &&
2257          (IsDoubleOrFloatElementsKind(instr->elements_kind()))) ||
2258         (CPU::SupportsSIMD128InCrankshaft()
2259             ? instr->representation().IsFloat32x4()
2260             : instr->representation().IsTagged() &&
2261          (IsFloat32x4ElementsKind(instr->elements_kind()))) ||
2262         (CPU::SupportsSIMD128InCrankshaft()
2263             ? instr->representation().IsInt32x4()
2264             : instr->representation().IsTagged() &&
2265          (IsInt32x4ElementsKind(instr->elements_kind()))));
2266     LOperand* backing_store = UseRegister(instr->elements());
2267     result = DefineAsRegister(new(zone()) LLoadKeyed(backing_store, key,
2268         load_128bits_without_sse2 ? TempRegister() : NULL));
2269     if (load_128bits_without_sse2) {
2270       info()->MarkAsDeferredCalling();
2271       AssignPointerMap(result);
2272     }
2273   }
2274
2275   if ((instr->is_external() || instr->is_fixed_typed_array()) ?
2276       // see LCodeGen::DoLoadKeyedExternalArray
2277       ((instr->elements_kind() == EXTERNAL_UINT32_ELEMENTS ||
2278         instr->elements_kind() == UINT32_ELEMENTS) &&
2279        !instr->CheckFlag(HInstruction::kUint32)) :
2280       // see LCodeGen::DoLoadKeyedFixedDoubleArray and
2281       // LCodeGen::DoLoadKeyedFixedArray
2282       instr->RequiresHoleCheck()) {
2283     result = AssignEnvironment(result);
2284   }
2285   return result;
2286 }
2287
2288
2289 LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
2290   LOperand* context = UseFixed(instr->context(), esi);
2291   LOperand* object = UseFixed(instr->object(), edx);
2292   LOperand* key = UseFixed(instr->key(), ecx);
2293
2294   LLoadKeyedGeneric* result =
2295       new(zone()) LLoadKeyedGeneric(context, object, key);
2296   return MarkAsCall(DefineFixed(result, eax), instr);
2297 }
2298
2299
2300 LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
2301   ElementsKind elements_kind = instr->elements_kind();
2302
2303   // Determine if we need a byte register in this case for the value.
2304   bool val_is_fixed_register =
2305       elements_kind == EXTERNAL_INT8_ELEMENTS ||
2306       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
2307       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
2308       elements_kind == UINT8_ELEMENTS ||
2309       elements_kind == INT8_ELEMENTS ||
2310       elements_kind == UINT8_CLAMPED_ELEMENTS;
2311   if (val_is_fixed_register) {
2312     return UseFixed(instr->value(), eax);
2313   }
2314
2315   if (!CpuFeatures::IsSafeForSnapshot(SSE2) &&
2316       IsDoubleOrFloatElementsKind(elements_kind)) {
2317     return UseRegisterAtStart(instr->value());
2318   }
2319
2320   return UseRegister(instr->value());
2321 }
2322
2323
2324 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
2325   if (!instr->is_typed_elements()) {
2326     ASSERT(instr->elements()->representation().IsTagged());
2327     ASSERT(instr->key()->representation().IsInteger32() ||
2328            instr->key()->representation().IsSmi());
2329
2330     if (instr->value()->representation().IsDouble()) {
2331       LOperand* object = UseRegisterAtStart(instr->elements());
2332       LOperand* val = NULL;
2333       val = UseRegisterAtStart(instr->value());
2334       LOperand* key = UseRegisterOrConstantAtStart(instr->key());
2335       return new(zone()) LStoreKeyed(object, key, val, NULL);
2336     } else {
2337       ASSERT(instr->value()->representation().IsSmiOrTagged());
2338       bool needs_write_barrier = instr->NeedsWriteBarrier();
2339
2340       LOperand* obj = UseRegister(instr->elements());
2341       LOperand* val;
2342       LOperand* key;
2343       if (needs_write_barrier) {
2344         val = UseTempRegister(instr->value());
2345         key = UseTempRegister(instr->key());
2346       } else {
2347         val = UseRegisterOrConstantAtStart(instr->value());
2348         key = UseRegisterOrConstantAtStart(instr->key());
2349       }
2350       return new(zone()) LStoreKeyed(obj, key, val, NULL);
2351     }
2352   }
2353
2354   ElementsKind elements_kind = instr->elements_kind();
2355   ASSERT(
2356       (instr->value()->representation().IsInteger32() &&
2357        !IsDoubleOrFloatElementsKind(elements_kind)) ||
2358       (instr->value()->representation().IsDouble() &&
2359        IsDoubleOrFloatElementsKind(elements_kind)) ||
2360       (CPU::SupportsSIMD128InCrankshaft()
2361           ? instr->value()->representation().IsFloat32x4()
2362           : instr->value()->representation().IsTagged() &&
2363        IsFloat32x4ElementsKind(elements_kind)) ||
2364       (CPU::SupportsSIMD128InCrankshaft()
2365           ? instr->value()->representation().IsInt32x4()
2366           : instr->value()->representation().IsTagged() &&
2367        IsInt32x4ElementsKind(elements_kind)));
2368   ASSERT((instr->is_fixed_typed_array() &&
2369           instr->elements()->representation().IsTagged()) ||
2370          (instr->is_external() &&
2371           instr->elements()->representation().IsExternal()));
2372
2373   LOperand* backing_store = UseRegister(instr->elements());
2374   LOperand* val = GetStoreKeyedValueOperand(instr);
2375   bool clobbers_key = ExternalArrayOpRequiresTemp(
2376       instr->key()->representation(), elements_kind);
2377   LOperand* key = clobbers_key
2378       ? UseTempRegister(instr->key())
2379       : UseRegisterOrConstantAtStart(instr->key());
2380   bool store_128bits_without_sse2 = IsSIMD128ElementsKind(elements_kind) &&
2381                                     !CPU::SupportsSIMD128InCrankshaft();
2382   LStoreKeyed* result =
2383       new(zone()) LStoreKeyed(backing_store, key, val,
2384           store_128bits_without_sse2 ? TempRegister() : NULL);
2385   return store_128bits_without_sse2 ? AssignEnvironment(result) : result;
2386 }
2387
2388
2389 LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
2390   LOperand* context = UseFixed(instr->context(), esi);
2391   LOperand* object = UseFixed(instr->object(), edx);
2392   LOperand* key = UseFixed(instr->key(), ecx);
2393   LOperand* value = UseFixed(instr->value(), eax);
2394
2395   ASSERT(instr->object()->representation().IsTagged());
2396   ASSERT(instr->key()->representation().IsTagged());
2397   ASSERT(instr->value()->representation().IsTagged());
2398
2399   LStoreKeyedGeneric* result =
2400       new(zone()) LStoreKeyedGeneric(context, object, key, value);
2401   return MarkAsCall(result, instr);
2402 }
2403
2404
2405 LInstruction* LChunkBuilder::DoTransitionElementsKind(
2406     HTransitionElementsKind* instr) {
2407   LOperand* object = UseRegister(instr->object());
2408   if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
2409     LOperand* object = UseRegister(instr->object());
2410     LOperand* new_map_reg = TempRegister();
2411     LOperand* temp_reg = TempRegister();
2412     LTransitionElementsKind* result =
2413         new(zone()) LTransitionElementsKind(object, NULL,
2414                                             new_map_reg, temp_reg);
2415     return result;
2416   } else {
2417     LOperand* context = UseFixed(instr->context(), esi);
2418     LTransitionElementsKind* result =
2419         new(zone()) LTransitionElementsKind(object, context, NULL, NULL);
2420     return AssignPointerMap(result);
2421   }
2422 }
2423
2424
2425 LInstruction* LChunkBuilder::DoTrapAllocationMemento(
2426     HTrapAllocationMemento* instr) {
2427   LOperand* object = UseRegister(instr->object());
2428   LOperand* temp = TempRegister();
2429   LTrapAllocationMemento* result =
2430       new(zone()) LTrapAllocationMemento(object, temp);
2431   return AssignEnvironment(result);
2432 }
2433
2434
2435 LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
2436   bool is_in_object = instr->access().IsInobject();
2437   bool is_external_location = instr->access().IsExternalMemory() &&
2438       instr->access().offset() == 0;
2439   bool needs_write_barrier = instr->NeedsWriteBarrier();
2440   bool needs_write_barrier_for_map = instr->has_transition() &&
2441       instr->NeedsWriteBarrierForMap();
2442
2443   LOperand* obj;
2444   if (needs_write_barrier) {
2445     obj = is_in_object
2446         ? UseRegister(instr->object())
2447         : UseTempRegister(instr->object());
2448   } else if (is_external_location) {
2449     ASSERT(!is_in_object);
2450     ASSERT(!needs_write_barrier);
2451     ASSERT(!needs_write_barrier_for_map);
2452     obj = UseRegisterOrConstant(instr->object());
2453   } else {
2454     obj = needs_write_barrier_for_map
2455         ? UseRegister(instr->object())
2456         : UseRegisterAtStart(instr->object());
2457   }
2458
2459   bool can_be_constant = instr->value()->IsConstant() &&
2460       HConstant::cast(instr->value())->NotInNewSpace() &&
2461       !instr->field_representation().IsDouble();
2462
2463   LOperand* val;
2464   if (instr->field_representation().IsInteger8() ||
2465       instr->field_representation().IsUInteger8()) {
2466     // mov_b requires a byte register (i.e. any of eax, ebx, ecx, edx).
2467     // Just force the value to be in eax and we're safe here.
2468     val = UseFixed(instr->value(), eax);
2469   } else if (needs_write_barrier) {
2470     val = UseTempRegister(instr->value());
2471   } else if (can_be_constant) {
2472     val = UseRegisterOrConstant(instr->value());
2473   } else if (instr->field_representation().IsSmi()) {
2474     val = UseTempRegister(instr->value());
2475   } else if (instr->field_representation().IsDouble()) {
2476     val = UseRegisterAtStart(instr->value());
2477   } else {
2478     val = UseRegister(instr->value());
2479   }
2480
2481   // We only need a scratch register if we have a write barrier or we
2482   // have a store into the properties array (not in-object-property).
2483   LOperand* temp = (!is_in_object || needs_write_barrier ||
2484                     needs_write_barrier_for_map) ? TempRegister() : NULL;
2485
2486   // We need a temporary register for write barrier of the map field.
2487   LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL;
2488
2489   LInstruction* result =
2490       new(zone()) LStoreNamedField(obj, val, temp, temp_map);
2491   if (!instr->access().IsExternalMemory() &&
2492       instr->field_representation().IsHeapObject() &&
2493       (val->IsConstantOperand()
2494        ? HConstant::cast(instr->value())->HasSmiValue()
2495        : !instr->value()->type().IsHeapObject())) {
2496     result = AssignEnvironment(result);
2497   }
2498   return result;
2499 }
2500
2501
2502 LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
2503   LOperand* context = UseFixed(instr->context(), esi);
2504   LOperand* object = UseFixed(instr->object(), edx);
2505   LOperand* value = UseFixed(instr->value(), eax);
2506
2507   LStoreNamedGeneric* result =
2508       new(zone()) LStoreNamedGeneric(context, object, value);
2509   return MarkAsCall(result, instr);
2510 }
2511
2512
2513 LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
2514   LOperand* context = UseFixed(instr->context(), esi);
2515   LOperand* left = UseFixed(instr->left(), edx);
2516   LOperand* right = UseFixed(instr->right(), eax);
2517   LStringAdd* string_add = new(zone()) LStringAdd(context, left, right);
2518   return MarkAsCall(DefineFixed(string_add, eax), instr);
2519 }
2520
2521
2522 LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
2523   LOperand* string = UseTempRegister(instr->string());
2524   LOperand* index = UseTempRegister(instr->index());
2525   LOperand* context = UseAny(instr->context());
2526   LStringCharCodeAt* result =
2527       new(zone()) LStringCharCodeAt(context, string, index);
2528   return AssignPointerMap(DefineAsRegister(result));
2529 }
2530
2531
2532 LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
2533   LOperand* char_code = UseRegister(instr->value());
2534   LOperand* context = UseAny(instr->context());
2535   LStringCharFromCode* result =
2536       new(zone()) LStringCharFromCode(context, char_code);
2537   return AssignPointerMap(DefineAsRegister(result));
2538 }
2539
2540
2541 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
2542   info()->MarkAsDeferredCalling();
2543   LOperand* context = UseAny(instr->context());
2544   LOperand* size = instr->size()->IsConstant()
2545       ? UseConstant(instr->size())
2546       : UseTempRegister(instr->size());
2547   LOperand* temp = TempRegister();
2548   LAllocate* result = new(zone()) LAllocate(context, size, temp);
2549   return AssignPointerMap(DefineAsRegister(result));
2550 }
2551
2552
2553 LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
2554   LOperand* context = UseFixed(instr->context(), esi);
2555   return MarkAsCall(
2556       DefineFixed(new(zone()) LRegExpLiteral(context), eax), instr);
2557 }
2558
2559
2560 LInstruction* LChunkBuilder::DoFunctionLiteral(HFunctionLiteral* instr) {
2561   LOperand* context = UseFixed(instr->context(), esi);
2562   return MarkAsCall(
2563       DefineFixed(new(zone()) LFunctionLiteral(context), eax), instr);
2564 }
2565
2566
2567 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
2568   ASSERT(argument_count_ == 0);
2569   allocator_->MarkAsOsrEntry();
2570   current_block_->last_environment()->set_ast_id(instr->ast_id());
2571   return AssignEnvironment(new(zone()) LOsrEntry);
2572 }
2573
2574
2575 LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
2576   LParameter* result = new(zone()) LParameter;
2577   if (instr->kind() == HParameter::STACK_PARAMETER) {
2578     int spill_index = chunk()->GetParameterStackSlot(instr->index());
2579     return DefineAsSpilled(result, spill_index);
2580   } else {
2581     ASSERT(info()->IsStub());
2582     CodeStubInterfaceDescriptor* descriptor =
2583         info()->code_stub()->GetInterfaceDescriptor(info()->isolate());
2584     int index = static_cast<int>(instr->index());
2585     Register reg = descriptor->GetParameterRegister(index);
2586     return DefineFixed(result, reg);
2587   }
2588 }
2589
2590
2591 LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
2592   // Use an index that corresponds to the location in the unoptimized frame,
2593   // which the optimized frame will subsume.
2594   int env_index = instr->index();
2595   int spill_index = 0;
2596   if (instr->environment()->is_parameter_index(env_index)) {
2597     spill_index = chunk()->GetParameterStackSlot(env_index);
2598   } else {
2599     spill_index = env_index - instr->environment()->first_local_index();
2600     if (spill_index > LUnallocated::kMaxFixedSlotIndex) {
2601       Abort(kNotEnoughSpillSlotsForOsr);
2602       spill_index = 0;
2603     }
2604     if (spill_index == 0) {
2605       // The dynamic frame alignment state overwrites the first local.
2606       // The first local is saved at the end of the unoptimized frame.
2607       spill_index = graph()->osr()->UnoptimizedFrameSlots();
2608     }
2609   }
2610   return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index);
2611 }
2612
2613
2614 LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
2615   LOperand* context = UseFixed(instr->context(), esi);
2616   LCallStub* result = new(zone()) LCallStub(context);
2617   return MarkAsCall(DefineFixed(result, eax), instr);
2618 }
2619
2620
2621 LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
2622   // There are no real uses of the arguments object.
2623   // arguments.length and element access are supported directly on
2624   // stack arguments, and any real arguments object use causes a bailout.
2625   // So this value is never used.
2626   return NULL;
2627 }
2628
2629
2630 LInstruction* LChunkBuilder::DoCapturedObject(HCapturedObject* instr) {
2631   instr->ReplayEnvironment(current_block_->last_environment());
2632
2633   // There are no real uses of a captured object.
2634   return NULL;
2635 }
2636
2637
2638 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
2639   info()->MarkAsRequiresFrame();
2640   LOperand* args = UseRegister(instr->arguments());
2641   LOperand* length;
2642   LOperand* index;
2643   if (instr->length()->IsConstant() && instr->index()->IsConstant()) {
2644     length = UseRegisterOrConstant(instr->length());
2645     index = UseOrConstant(instr->index());
2646   } else {
2647     length = UseTempRegister(instr->length());
2648     index = Use(instr->index());
2649   }
2650   return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
2651 }
2652
2653
2654 LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
2655   LOperand* object = UseFixed(instr->value(), eax);
2656   LToFastProperties* result = new(zone()) LToFastProperties(object);
2657   return MarkAsCall(DefineFixed(result, eax), instr);
2658 }
2659
2660
2661 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
2662   LOperand* context = UseFixed(instr->context(), esi);
2663   LOperand* value = UseAtStart(instr->value());
2664   LTypeof* result = new(zone()) LTypeof(context, value);
2665   return MarkAsCall(DefineFixed(result, eax), instr);
2666 }
2667
2668
2669 LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
2670   LInstruction* goto_instr = CheckElideControlInstruction(instr);
2671   if (goto_instr != NULL) return goto_instr;
2672   return new(zone()) LTypeofIsAndBranch(UseTempRegister(instr->value()));
2673 }
2674
2675
2676 LInstruction* LChunkBuilder::DoIsConstructCallAndBranch(
2677     HIsConstructCallAndBranch* instr) {
2678   return new(zone()) LIsConstructCallAndBranch(TempRegister());
2679 }
2680
2681
2682 LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
2683   instr->ReplayEnvironment(current_block_->last_environment());
2684   return NULL;
2685 }
2686
2687
2688 LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
2689   info()->MarkAsDeferredCalling();
2690   if (instr->is_function_entry()) {
2691     LOperand* context = UseFixed(instr->context(), esi);
2692     return MarkAsCall(new(zone()) LStackCheck(context), instr);
2693   } else {
2694     ASSERT(instr->is_backwards_branch());
2695     LOperand* context = UseAny(instr->context());
2696     return AssignEnvironment(
2697         AssignPointerMap(new(zone()) LStackCheck(context)));
2698   }
2699 }
2700
2701
2702 LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
2703   HEnvironment* outer = current_block_->last_environment();
2704   HConstant* undefined = graph()->GetConstantUndefined();
2705   HEnvironment* inner = outer->CopyForInlining(instr->closure(),
2706                                                instr->arguments_count(),
2707                                                instr->function(),
2708                                                undefined,
2709                                                instr->inlining_kind());
2710   // Only replay binding of arguments object if it wasn't removed from graph.
2711   if (instr->arguments_var() != NULL && instr->arguments_object()->IsLinked()) {
2712     inner->Bind(instr->arguments_var(), instr->arguments_object());
2713   }
2714   inner->set_entry(instr);
2715   current_block_->UpdateEnvironment(inner);
2716   chunk_->AddInlinedClosure(instr->closure());
2717   return NULL;
2718 }
2719
2720
2721 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
2722   LInstruction* pop = NULL;
2723
2724   HEnvironment* env = current_block_->last_environment();
2725
2726   if (env->entry()->arguments_pushed()) {
2727     int argument_count = env->arguments_environment()->parameter_count();
2728     pop = new(zone()) LDrop(argument_count);
2729     ASSERT(instr->argument_delta() == -argument_count);
2730   }
2731
2732   HEnvironment* outer = current_block_->last_environment()->
2733       DiscardInlined(false);
2734   current_block_->UpdateEnvironment(outer);
2735   return pop;
2736 }
2737
2738
2739 LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
2740   LOperand* context = UseFixed(instr->context(), esi);
2741   LOperand* object = UseFixed(instr->enumerable(), eax);
2742   LForInPrepareMap* result = new(zone()) LForInPrepareMap(context, object);
2743   return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
2744 }
2745
2746
2747 LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
2748   LOperand* map = UseRegister(instr->map());
2749   return AssignEnvironment(DefineAsRegister(
2750       new(zone()) LForInCacheArray(map)));
2751 }
2752
2753
2754 LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) {
2755   LOperand* value = UseRegisterAtStart(instr->value());
2756   LOperand* map = UseRegisterAtStart(instr->map());
2757   return AssignEnvironment(new(zone()) LCheckMapValue(value, map));
2758 }
2759
2760
2761 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
2762   LOperand* object = UseRegister(instr->object());
2763   LOperand* index = UseTempRegister(instr->index());
2764   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
2765 }
2766
2767
2768 const char* LNullarySIMDOperation::Mnemonic() const {
2769   switch (op()) {
2770 #define SIMD_NULLARY_OPERATION_CASE_ITEM(module, function, name, p4)           \
2771     case k##name:                                                              \
2772       return #module "-" #function;
2773 SIMD_NULLARY_OPERATIONS(SIMD_NULLARY_OPERATION_CASE_ITEM)
2774 #undef SIMD_NULLARY_OPERATION_CASE_ITEM
2775     default:
2776       UNREACHABLE();
2777       return NULL;
2778   }
2779 }
2780
2781
2782 LInstruction* LChunkBuilder::DoNullarySIMDOperation(
2783     HNullarySIMDOperation* instr) {
2784   LNullarySIMDOperation* result =
2785       new(zone()) LNullarySIMDOperation(instr->op());
2786   switch (instr->op()) {
2787 #define SIMD_NULLARY_OPERATION_CASE_ITEM(module, function, name, p4)           \
2788     case k##name:
2789 SIMD_NULLARY_OPERATIONS(SIMD_NULLARY_OPERATION_CASE_ITEM)
2790 #undef SIMD_NULLARY_OPERATION_CASE_ITEM
2791       return DefineAsRegister(result);
2792     default:
2793       UNREACHABLE();
2794       return NULL;
2795   }
2796 }
2797
2798
2799 const char* LUnarySIMDOperation::Mnemonic() const {
2800   switch (op()) {
2801     case kSIMD128Change: return "SIMD128-change";
2802 #define SIMD_UNARY_OPERATION_CASE_ITEM(module, function, name, p4, p5)         \
2803     case k##name:                                                              \
2804       return #module "-" #function;
2805 SIMD_UNARY_OPERATIONS(SIMD_UNARY_OPERATION_CASE_ITEM)
2806 SIMD_UNARY_OPERATIONS_FOR_PROPERTY_ACCESS(SIMD_UNARY_OPERATION_CASE_ITEM)
2807 #undef SIMD_UNARY_OPERATION_CASE_ITEM
2808     default:
2809       UNREACHABLE();
2810       return NULL;
2811   }
2812 }
2813
2814
2815 LInstruction* LChunkBuilder::DoUnarySIMDOperation(HUnarySIMDOperation* instr) {
2816   LOperand* input = UseRegisterAtStart(instr->value());
2817   LUnarySIMDOperation* result =
2818       new(zone()) LUnarySIMDOperation(input, instr->op());
2819   switch (instr->op()) {
2820     case kSIMD128Change:
2821       return AssignEnvironment(DefineAsRegister(result));
2822     case kFloat32x4Abs:
2823     case kFloat32x4Neg:
2824     case kFloat32x4Reciprocal:
2825     case kFloat32x4ReciprocalSqrt:
2826     case kFloat32x4Sqrt:
2827     case kInt32x4Neg:
2828     case kInt32x4Not:
2829       return DefineSameAsFirst(result);
2830     case kFloat32x4BitsToInt32x4:
2831     case kFloat32x4ToInt32x4:
2832     case kInt32x4BitsToFloat32x4:
2833     case kInt32x4ToFloat32x4:
2834     case kFloat32x4Splat:
2835     case kInt32x4Splat:
2836     case kFloat32x4GetSignMask:
2837     case kFloat32x4GetX:
2838     case kFloat32x4GetY:
2839     case kFloat32x4GetZ:
2840     case kFloat32x4GetW:
2841     case kInt32x4GetSignMask:
2842     case kInt32x4GetX:
2843     case kInt32x4GetY:
2844     case kInt32x4GetZ:
2845     case kInt32x4GetW:
2846     case kInt32x4GetFlagX:
2847     case kInt32x4GetFlagY:
2848     case kInt32x4GetFlagZ:
2849     case kInt32x4GetFlagW:
2850       return DefineAsRegister(result);
2851     default:
2852       UNREACHABLE();
2853       return NULL;
2854   }
2855 }
2856
2857
2858 const char* LBinarySIMDOperation::Mnemonic() const {
2859   switch (op()) {
2860 #define SIMD_BINARY_OPERATION_CASE_ITEM(module, function, name, p4, p5, p6)    \
2861     case k##name:                                                              \
2862       return #module "-" #function;
2863 SIMD_BINARY_OPERATIONS(SIMD_BINARY_OPERATION_CASE_ITEM)
2864 #undef SIMD_BINARY_OPERATION_CASE_ITEM
2865     default:
2866       UNREACHABLE();
2867       return NULL;
2868   }
2869 }
2870
2871
2872 LInstruction* LChunkBuilder::DoBinarySIMDOperation(
2873     HBinarySIMDOperation* instr) {
2874   switch (instr->op()) {
2875     case kFloat32x4Add:
2876     case kFloat32x4Div:
2877     case kFloat32x4Max:
2878     case kFloat32x4Min:
2879     case kFloat32x4Mul:
2880     case kFloat32x4Sub:
2881     case kFloat32x4Scale:
2882     case kFloat32x4WithX:
2883     case kFloat32x4WithY:
2884     case kFloat32x4WithZ:
2885     case kFloat32x4WithW:
2886     case kInt32x4Add:
2887     case kInt32x4And:
2888     case kInt32x4Mul:
2889     case kInt32x4Or:
2890     case kInt32x4Sub:
2891     case kInt32x4Xor:
2892     case kInt32x4WithX:
2893     case kInt32x4WithY:
2894     case kInt32x4WithZ:
2895     case kInt32x4WithW:
2896     case kInt32x4WithFlagX:
2897     case kInt32x4WithFlagY:
2898     case kInt32x4WithFlagZ:
2899     case kInt32x4WithFlagW:
2900     case kInt32x4GreaterThan:
2901     case kInt32x4Equal:
2902     case kInt32x4LessThan: {
2903       LOperand* left = UseRegisterAtStart(instr->left());
2904       LOperand* right = UseRegisterAtStart(instr->right());
2905       LBinarySIMDOperation* result =
2906           new(zone()) LBinarySIMDOperation(left, right, instr->op());
2907       if (instr->op() == kInt32x4WithFlagX ||
2908           instr->op() == kInt32x4WithFlagY ||
2909           instr->op() == kInt32x4WithFlagZ ||
2910           instr->op() == kInt32x4WithFlagW) {
2911         return AssignEnvironment(DefineSameAsFirst(result));
2912       } else {
2913         return DefineSameAsFirst(result);
2914       }
2915     }
2916     case kFloat32x4Shuffle:
2917     case kInt32x4Shuffle:
2918     case kInt32x4ShiftLeft:
2919     case kInt32x4ShiftRight:
2920     case kInt32x4ShiftRightArithmetic: {
2921       LOperand* left = UseRegisterAtStart(instr->left());
2922       LOperand* right = UseOrConstant(instr->right());
2923       LBinarySIMDOperation* result =
2924           new(zone()) LBinarySIMDOperation(left, right, instr->op());
2925       return AssignEnvironment(DefineSameAsFirst(result));
2926     }
2927     case kFloat32x4LessThan:
2928     case kFloat32x4LessThanOrEqual:
2929     case kFloat32x4Equal:
2930     case kFloat32x4NotEqual:
2931     case kFloat32x4GreaterThanOrEqual:
2932     case kFloat32x4GreaterThan: {
2933       LOperand* left = UseRegisterAtStart(instr->left());
2934       LOperand* right = UseRegisterAtStart(instr->right());
2935       LBinarySIMDOperation* result =
2936           new(zone()) LBinarySIMDOperation(left, right, instr->op());
2937       return DefineAsRegister(result);
2938     }
2939     default:
2940       UNREACHABLE();
2941       return NULL;
2942   }
2943 }
2944
2945
2946 const char* LTernarySIMDOperation::Mnemonic() const {
2947   switch (op()) {
2948 #define SIMD_TERNARY_OPERATION_CASE_ITEM(module, function, name, p4, p5, p6,   \
2949                                          p7)                                   \
2950     case k##name:                                                              \
2951       return #module "-" #function;
2952 SIMD_TERNARY_OPERATIONS(SIMD_TERNARY_OPERATION_CASE_ITEM)
2953 #undef SIMD_TERNARY_OPERATION_CASE_ITEM
2954     default:
2955       UNREACHABLE();
2956       return NULL;
2957   }
2958 }
2959
2960
2961 LInstruction* LChunkBuilder::DoTernarySIMDOperation(
2962     HTernarySIMDOperation* instr) {
2963   LOperand* first = UseRegisterAtStart(instr->first());
2964   LOperand* second = UseRegisterAtStart(instr->second());
2965   LOperand* third = instr->op() == kFloat32x4ShuffleMix
2966                     ? UseOrConstant(instr->third())
2967                     : UseRegisterAtStart(instr->third());
2968   LTernarySIMDOperation* result =
2969       new(zone()) LTernarySIMDOperation(first, second, third, instr->op());
2970   switch (instr->op()) {
2971     case kInt32x4Select: {
2972       return DefineAsRegister(result);
2973     }
2974     case kFloat32x4ShuffleMix: {
2975       return AssignEnvironment(DefineSameAsFirst(result));
2976     }
2977     case kFloat32x4Clamp: {
2978       return DefineSameAsFirst(result);
2979     }
2980     default:
2981       UNREACHABLE();
2982       return NULL;
2983   }
2984 }
2985
2986
2987 const char* LQuarternarySIMDOperation::Mnemonic() const {
2988   switch (op()) {
2989 #define SIMD_QUARTERNARY_OPERATION_CASE_ITEM(module, function, name, p4, p5,   \
2990                                              p6, p7, p8)                       \
2991     case k##name:                                                              \
2992       return #module "-" #function;
2993 SIMD_QUARTERNARY_OPERATIONS(SIMD_QUARTERNARY_OPERATION_CASE_ITEM)
2994 #undef SIMD_QUARTERNARY_OPERATION_CASE_ITEM
2995     default:
2996       UNREACHABLE();
2997       return NULL;
2998   }
2999 }
3000
3001
3002 LInstruction* LChunkBuilder::DoQuarternarySIMDOperation(
3003     HQuarternarySIMDOperation* instr) {
3004   LOperand* x = UseRegisterAtStart(instr->x());
3005   LOperand* y = UseRegisterAtStart(instr->y());
3006   LOperand* z = UseRegisterAtStart(instr->z());
3007   LOperand* w = UseRegisterAtStart(instr->w());
3008   LQuarternarySIMDOperation* result =
3009       new(zone()) LQuarternarySIMDOperation(x, y, z, w, instr->op());
3010   if (instr->op() == kInt32x4Bool) {
3011     return AssignEnvironment(DefineAsRegister(result));
3012   } else {
3013     return DefineAsRegister(result);
3014   }
3015 }
3016
3017
3018 } }  // namespace v8::internal
3019
3020 #endif  // V8_TARGET_ARCH_IA32