Move Hydrogen and Lithium to src/crankshaft/

src/ia32/lithium-ia32.cc

-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "src/ia32/lithium-ia32.h"
-
-#include <sstream>
-
-#if V8_TARGET_ARCH_IA32
-
-#include "src/hydrogen-osr.h"
-#include "src/ia32/lithium-codegen-ia32.h"
-#include "src/lithium-inl.h"
-
-namespace v8 {
-namespace internal {
-
-#define DEFINE_COMPILE(type)                            \
-  void L##type::CompileToNative(LCodeGen* generator) {  \
-    generator->Do##type(this);                          \
-  }
-LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
-#undef DEFINE_COMPILE
-
-
-#ifdef DEBUG
-void LInstruction::VerifyCall() {
-  // Call instructions can use only fixed registers as temporaries and
-  // outputs because all registers are blocked by the calling convention.
-  // Inputs operands must use a fixed register or use-at-start policy or
-  // a non-register policy.
-  DCHECK(Output() == NULL ||
-         LUnallocated::cast(Output())->HasFixedPolicy() ||
-         !LUnallocated::cast(Output())->HasRegisterPolicy());
-  for (UseIterator it(this); !it.Done(); it.Advance()) {
-    LUnallocated* operand = LUnallocated::cast(it.Current());
-    DCHECK(operand->HasFixedPolicy() ||
-           operand->IsUsedAtStart());
-  }
-  for (TempIterator it(this); !it.Done(); it.Advance()) {
-    LUnallocated* operand = LUnallocated::cast(it.Current());
-    DCHECK(operand->HasFixedPolicy() ||!operand->HasRegisterPolicy());
-  }
-}
-#endif
-
-
-bool LInstruction::HasDoubleRegisterResult() {
-  return HasResult() && result()->IsDoubleRegister();
-}
-
-
-bool LInstruction::HasDoubleRegisterInput() {
-  for (int i = 0; i < InputCount(); i++) {
-    LOperand* op = InputAt(i);
-    if (op != NULL && op->IsDoubleRegister()) {
-      return true;
-    }
-  }
-  return false;
-}
-
-
-void LInstruction::PrintTo(StringStream* stream) {
-  stream->Add("%s ", this->Mnemonic());
-
-  PrintOutputOperandTo(stream);
-
-  PrintDataTo(stream);
-
-  if (HasEnvironment()) {
-    stream->Add(" ");
-    environment()->PrintTo(stream);
-  }
-
-  if (HasPointerMap()) {
-    stream->Add(" ");
-    pointer_map()->PrintTo(stream);
-  }
-}
-
-
-void LInstruction::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  for (int i = 0; i < InputCount(); i++) {
-    if (i > 0) stream->Add(" ");
-    if (InputAt(i) == NULL) {
-      stream->Add("NULL");
-    } else {
-      InputAt(i)->PrintTo(stream);
-    }
-  }
-}
-
-
-void LInstruction::PrintOutputOperandTo(StringStream* stream) {
-  if (HasResult()) result()->PrintTo(stream);
-}
-
-
-void LLabel::PrintDataTo(StringStream* stream) {
-  LGap::PrintDataTo(stream);
-  LLabel* rep = replacement();
-  if (rep != NULL) {
-    stream->Add(" Dead block replaced with B%d", rep->block_id());
-  }
-}
-
-
-bool LGap::IsRedundant() const {
-  for (int i = 0; i < 4; i++) {
-    if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-
-void LGap::PrintDataTo(StringStream* stream) {
-  for (int i = 0; i < 4; i++) {
-    stream->Add("(");
-    if (parallel_moves_[i] != NULL) {
-      parallel_moves_[i]->PrintDataTo(stream);
-    }
-    stream->Add(") ");
-  }
-}
-
-
-const char* LArithmeticD::Mnemonic() const {
-  switch (op()) {
-    case Token::ADD: return "add-d";
-    case Token::SUB: return "sub-d";
-    case Token::MUL: return "mul-d";
-    case Token::DIV: return "div-d";
-    case Token::MOD: return "mod-d";
-    default:
-      UNREACHABLE();
-      return NULL;
-  }
-}
-
-
-const char* LArithmeticT::Mnemonic() const {
-  switch (op()) {
-    case Token::ADD: return "add-t";
-    case Token::SUB: return "sub-t";
-    case Token::MUL: return "mul-t";
-    case Token::MOD: return "mod-t";
-    case Token::DIV: return "div-t";
-    case Token::BIT_AND: return "bit-and-t";
-    case Token::BIT_OR: return "bit-or-t";
-    case Token::BIT_XOR: return "bit-xor-t";
-    case Token::ROR: return "ror-t";
-    case Token::SHL: return "sal-t";
-    case Token::SAR: return "sar-t";
-    case Token::SHR: return "shr-t";
-    default:
-      UNREACHABLE();
-      return NULL;
-  }
-}
-
-
-bool LGoto::HasInterestingComment(LCodeGen* gen) const {
-  return !gen->IsNextEmittedBlock(block_id());
-}
-
-
-void LGoto::PrintDataTo(StringStream* stream) {
-  stream->Add("B%d", block_id());
-}
-
-
-void LBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
-  value()->PrintTo(stream);
-}
-
-
-void LCompareNumericAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if ");
-  left()->PrintTo(stream);
-  stream->Add(" %s ", Token::String(op()));
-  right()->PrintTo(stream);
-  stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if is_string(");
-  value()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if is_smi(");
-  value()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if is_undetectable(");
-  value()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if string_compare(");
-  left()->PrintTo(stream);
-  right()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if has_instance_type(");
-  value()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if has_cached_array_index(");
-  value()->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
-void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if class_of_test(");
-  value()->PrintTo(stream);
-  stream->Add(", \"%o\") then B%d else B%d",
-              *hydrogen()->class_name(),
-              true_block_id(),
-              false_block_id());
-}
-
-
-void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if typeof ");
-  value()->PrintTo(stream);
-  stream->Add(" == \"%s\" then B%d else B%d",
-              hydrogen()->type_literal()->ToCString().get(),
-              true_block_id(), false_block_id());
-}
-
-
-void LStoreCodeEntry::PrintDataTo(StringStream* stream) {
-  stream->Add(" = ");
-  function()->PrintTo(stream);
-  stream->Add(".code_entry = ");
-  code_object()->PrintTo(stream);
-}
-
-
-void LInnerAllocatedObject::PrintDataTo(StringStream* stream) {
-  stream->Add(" = ");
-  base_object()->PrintTo(stream);
-  stream->Add(" + ");
-  offset()->PrintTo(stream);
-}
-
-
-void LCallFunction::PrintDataTo(StringStream* stream) {
-  context()->PrintTo(stream);
-  stream->Add(" ");
-  function()->PrintTo(stream);
-  if (hydrogen()->HasVectorAndSlot()) {
-    stream->Add(" (type-feedback-vector ");
-    temp_vector()->PrintTo(stream);
-    stream->Add(" ");
-    temp_slot()->PrintTo(stream);
-    stream->Add(")");
-  }
-}
-
-
-void LCallJSFunction::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  function()->PrintTo(stream);
-  stream->Add("#%d / ", arity());
-}
-
-
-void LCallWithDescriptor::PrintDataTo(StringStream* stream) {
-  for (int i = 0; i < InputCount(); i++) {
-    InputAt(i)->PrintTo(stream);
-    stream->Add(" ");
-  }
-  stream->Add("#%d / ", arity());
-}
-
-
-void LLoadContextSlot::PrintDataTo(StringStream* stream) {
-  context()->PrintTo(stream);
-  stream->Add("[%d]", slot_index());
-}
-
-
-void LStoreContextSlot::PrintDataTo(StringStream* stream) {
-  context()->PrintTo(stream);
-  stream->Add("[%d] <- ", slot_index());
-  value()->PrintTo(stream);
-}
-
-
-void LInvokeFunction::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  context()->PrintTo(stream);
-  stream->Add(" ");
-  function()->PrintTo(stream);
-  stream->Add(" #%d / ", arity());
-}
-
-
-void LCallNew::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  context()->PrintTo(stream);
-  stream->Add(" ");
-  constructor()->PrintTo(stream);
-  stream->Add(" #%d / ", arity());
-}
-
-
-void LCallNewArray::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  context()->PrintTo(stream);
-  stream->Add(" ");
-  constructor()->PrintTo(stream);
-  stream->Add(" #%d / ", arity());
-  ElementsKind kind = hydrogen()->elements_kind();
-  stream->Add(" (%s) ", ElementsKindToString(kind));
-}
-
-
-void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
-  arguments()->PrintTo(stream);
-
-  stream->Add(" length ");
-  length()->PrintTo(stream);
-
-  stream->Add(" index ");
-  index()->PrintTo(stream);
-}
-
-
-int LPlatformChunk::GetNextSpillIndex(RegisterKind kind) {
-  // Skip a slot if for a double-width slot.
-  if (kind == DOUBLE_REGISTERS) {
-    spill_slot_count_++;
-    spill_slot_count_ |= 1;
-    num_double_slots_++;
-  }
-  return spill_slot_count_++;
-}
-
-
-LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
-  int index = GetNextSpillIndex(kind);
-  if (kind == DOUBLE_REGISTERS) {
-    return LDoubleStackSlot::Create(index, zone());
-  } else {
-    DCHECK(kind == GENERAL_REGISTERS);
-    return LStackSlot::Create(index, zone());
-  }
-}
-
-
-void LLoadGlobalViaContext::PrintDataTo(StringStream* stream) {
-  stream->Add("depth:%d slot:%d", depth(), slot_index());
-}
-
-
-void LStoreNamedField::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
-  std::ostringstream os;
-  os << hydrogen()->access() << " <- ";
-  stream->Add(os.str().c_str());
-  value()->PrintTo(stream);
-}
-
-
-void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
-  stream->Add(".");
-  stream->Add(String::cast(*name())->ToCString().get());
-  stream->Add(" <- ");
-  value()->PrintTo(stream);
-}
-
-
-void LStoreGlobalViaContext::PrintDataTo(StringStream* stream) {
-  stream->Add("depth:%d slot:%d <- ", depth(), slot_index());
-  value()->PrintTo(stream);
-}
-
-
-void LLoadKeyed::PrintDataTo(StringStream* stream) {
-  elements()->PrintTo(stream);
-  stream->Add("[");
-  key()->PrintTo(stream);
-  if (hydrogen()->IsDehoisted()) {
-    stream->Add(" + %d]", base_offset());
-  } else {
-    stream->Add("]");
-  }
-}
-
-
-void LStoreKeyed::PrintDataTo(StringStream* stream) {
-  elements()->PrintTo(stream);
-  stream->Add("[");
-  key()->PrintTo(stream);
-  if (hydrogen()->IsDehoisted()) {
-    stream->Add(" + %d] <-", base_offset());
-  } else {
-    stream->Add("] <- ");
-  }
-
-  if (value() == NULL) {
-    DCHECK(hydrogen()->IsConstantHoleStore() &&
-           hydrogen()->value()->representation().IsDouble());
-    stream->Add("<the hole(nan)>");
-  } else {
-    value()->PrintTo(stream);
-  }
-}
-
-
-void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
-  stream->Add("[");
-  key()->PrintTo(stream);
-  stream->Add("] <- ");
-  value()->PrintTo(stream);
-}
-
-
-void LTransitionElementsKind::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
-  stream->Add(" %p -> %p", *original_map(), *transitioned_map());
-}
-
-
-LPlatformChunk* LChunkBuilder::Build() {
-  DCHECK(is_unused());
-  chunk_ = new(zone()) LPlatformChunk(info(), graph());
-  LPhase phase("L_Building chunk", chunk_);
-  status_ = BUILDING;
-
-  // Reserve the first spill slot for the state of dynamic alignment.
-  if (info()->IsOptimizing()) {
-    int alignment_state_index = chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
-    DCHECK_EQ(alignment_state_index, 0);
-    USE(alignment_state_index);
-  }
-
-  // If compiling for OSR, reserve space for the unoptimized frame,
-  // which will be subsumed into this frame.
-  if (graph()->has_osr()) {
-    for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) {
-      chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
-    }
-  }
-
-  const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
-  for (int i = 0; i < blocks->length(); i++) {
-    HBasicBlock* next = NULL;
-    if (i < blocks->length() - 1) next = blocks->at(i + 1);
-    DoBasicBlock(blocks->at(i), next);
-    if (is_aborted()) return NULL;
-  }
-  status_ = DONE;
-  return chunk_;
-}
-
-
-LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
-  return new (zone()) LUnallocated(LUnallocated::FIXED_REGISTER, reg.code());
-}
-
-
-LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) {
-  return new (zone())
-      LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER, reg.code());
-}
-
-
-LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
-  return Use(value, ToUnallocated(fixed_register));
-}
-
-
-LOperand* LChunkBuilder::UseFixedDouble(HValue* value, XMMRegister reg) {
-  return Use(value, ToUnallocated(reg));
-}
-
-
-LOperand* LChunkBuilder::UseRegister(HValue* value) {
-  return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
-}
-
-
-LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
-  return Use(value,
-             new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
-                                      LUnallocated::USED_AT_START));
-}
-
-
-LOperand* LChunkBuilder::UseTempRegister(HValue* value) {
-  return Use(value, new(zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER));
-}
-
-
-LOperand* LChunkBuilder::Use(HValue* value) {
-  return Use(value, new(zone()) LUnallocated(LUnallocated::NONE));
-}
-
-
-LOperand* LChunkBuilder::UseAtStart(HValue* value) {
-  return Use(value, new(zone()) LUnallocated(LUnallocated::NONE,
-                                             LUnallocated::USED_AT_START));
-}
-
-
-static inline bool CanBeImmediateConstant(HValue* value) {
-  return value->IsConstant() && HConstant::cast(value)->NotInNewSpace();
-}
-
-
-LOperand* LChunkBuilder::UseOrConstant(HValue* value) {
-  return CanBeImmediateConstant(value)
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      : Use(value);
-}
-
-
-LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) {
-  return CanBeImmediateConstant(value)
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      : UseAtStart(value);
-}
-
-
-LOperand* LChunkBuilder::UseFixedOrConstant(HValue* value,
-                                            Register fixed_register) {
-  return CanBeImmediateConstant(value)
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      : UseFixed(value, fixed_register);
-}
-
-
-LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
-  return CanBeImmediateConstant(value)
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      : UseRegister(value);
-}
-
-
-LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
-  return CanBeImmediateConstant(value)
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      : UseRegisterAtStart(value);
-}
-
-
-LOperand* LChunkBuilder::UseConstant(HValue* value) {
-  return chunk_->DefineConstantOperand(HConstant::cast(value));
-}
-
-
-LOperand* LChunkBuilder::UseAny(HValue* value) {
-  return value->IsConstant()
-      ? chunk_->DefineConstantOperand(HConstant::cast(value))
-      :  Use(value, new(zone()) LUnallocated(LUnallocated::ANY));
-}
-
-
-LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
-  if (value->EmitAtUses()) {
-    HInstruction* instr = HInstruction::cast(value);
-    VisitInstruction(instr);
-  }
-  operand->set_virtual_register(value->id());
-  return operand;
-}
-
-
-LInstruction* LChunkBuilder::Define(LTemplateResultInstruction<1>* instr,
-                                    LUnallocated* result) {
-  result->set_virtual_register(current_instruction_->id());
-  instr->set_result(result);
-  return instr;
-}
-
-
-LInstruction* LChunkBuilder::DefineAsRegister(
-    LTemplateResultInstruction<1>* instr) {
-  return Define(instr,
-                new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
-}
-
-
-LInstruction* LChunkBuilder::DefineAsSpilled(
-    LTemplateResultInstruction<1>* instr,
-    int index) {
-  return Define(instr,
-                new(zone()) LUnallocated(LUnallocated::FIXED_SLOT, index));
-}
-
-
-LInstruction* LChunkBuilder::DefineSameAsFirst(
-    LTemplateResultInstruction<1>* instr) {
-  return Define(instr,
-                new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
-}
-
-
-LInstruction* LChunkBuilder::DefineFixed(LTemplateResultInstruction<1>* instr,
-                                         Register reg) {
-  return Define(instr, ToUnallocated(reg));
-}
-
-
-LInstruction* LChunkBuilder::DefineFixedDouble(
-    LTemplateResultInstruction<1>* instr,
-    XMMRegister reg) {
-  return Define(instr, ToUnallocated(reg));
-}
-
-
-LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
-  HEnvironment* hydrogen_env = current_block_->last_environment();
-  int argument_index_accumulator = 0;
-  ZoneList<HValue*> objects_to_materialize(0, zone());
-  instr->set_environment(CreateEnvironment(
-      hydrogen_env, &argument_index_accumulator, &objects_to_materialize));
-  return instr;
-}
-
-
-LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr,
-                                        HInstruction* hinstr,
-                                        CanDeoptimize can_deoptimize) {
-  info()->MarkAsNonDeferredCalling();
-
-#ifdef DEBUG
-  instr->VerifyCall();
-#endif
-  instr->MarkAsCall();
-  instr = AssignPointerMap(instr);
-
-  // If instruction does not have side-effects lazy deoptimization
-  // after the call will try to deoptimize to the point before the call.
-  // Thus we still need to attach environment to this call even if
-  // call sequence can not deoptimize eagerly.
-  bool needs_environment =
-      (can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) ||
-      !hinstr->HasObservableSideEffects();
-  if (needs_environment && !instr->HasEnvironment()) {
-    instr = AssignEnvironment(instr);
-    // We can't really figure out if the environment is needed or not.
-    instr->environment()->set_has_been_used();
-  }
-
-  return instr;
-}
-
-
-LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
-  DCHECK(!instr->HasPointerMap());
-  instr->set_pointer_map(new(zone()) LPointerMap(zone()));
-  return instr;
-}
-
-
-LUnallocated* LChunkBuilder::TempRegister() {
-  LUnallocated* operand =
-      new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
-  int vreg = allocator_->GetVirtualRegister();
-  if (!allocator_->AllocationOk()) {
-    Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
-    vreg = 0;
-  }
-  operand->set_virtual_register(vreg);
-  return operand;
-}
-
-
-LOperand* LChunkBuilder::FixedTemp(Register reg) {
-  LUnallocated* operand = ToUnallocated(reg);
-  DCHECK(operand->HasFixedPolicy());
-  return operand;
-}
-
-
-LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) {
-  LUnallocated* operand = ToUnallocated(reg);
-  DCHECK(operand->HasFixedPolicy());
-  return operand;
-}
-
-
-LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
-  return new(zone()) LLabel(instr->block());
-}
-
-
-LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
-  return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
-}
-
-
-LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) {
-  UNREACHABLE();
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
-  return AssignEnvironment(new(zone()) LDeoptimize);
-}
-
-
-LInstruction* LChunkBuilder::DoShift(Token::Value op,
-                                     HBitwiseBinaryOperation* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    LOperand* left = UseRegisterAtStart(instr->left());
-
-    HValue* right_value = instr->right();
-    LOperand* right = NULL;
-    int constant_value = 0;
-    bool does_deopt = false;
-    if (right_value->IsConstant()) {
-      HConstant* constant = HConstant::cast(right_value);
-      right = chunk_->DefineConstantOperand(constant);
-      constant_value = constant->Integer32Value() & 0x1f;
-      // Left shifts can deoptimize if we shift by > 0 and the result cannot be
-      // truncated to smi.
-      if (instr->representation().IsSmi() && constant_value > 0) {
-        does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi);
-      }
-    } else {
-      right = UseFixed(right_value, ecx);
-    }
-
-    // Shift operations can only deoptimize if we do a logical shift by 0 and
-    // the result cannot be truncated to int32.
-    if (op == Token::SHR && constant_value == 0) {
-      does_deopt = !instr->CheckFlag(HInstruction::kUint32);
-    }
-
-    LInstruction* result =
-        DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt));
-    return does_deopt ? AssignEnvironment(result) : result;
-  } else {
-    return DoArithmeticT(op, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
-                                           HArithmeticBinaryOperation* instr) {
-  DCHECK(instr->representation().IsDouble());
-  DCHECK(instr->left()->representation().IsDouble());
-  DCHECK(instr->right()->representation().IsDouble());
-  if (op == Token::MOD) {
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
-    LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
-    LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
-    return MarkAsCall(DefineSameAsFirst(result), instr);
-  } else {
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
-    LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
-    LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
-    return CpuFeatures::IsSupported(AVX) ? DefineAsRegister(result)
-                                         : DefineSameAsFirst(result);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
-                                           HBinaryOperation* instr) {
-  HValue* left = instr->left();
-  HValue* right = instr->right();
-  DCHECK(left->representation().IsTagged());
-  DCHECK(right->representation().IsTagged());
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* left_operand = UseFixed(left, edx);
-  LOperand* right_operand = UseFixed(right, eax);
-  LArithmeticT* result =
-      new(zone()) LArithmeticT(op, context, left_operand, right_operand);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) {
-  DCHECK(is_building());
-  current_block_ = block;
-  next_block_ = next_block;
-  if (block->IsStartBlock()) {
-    block->UpdateEnvironment(graph_->start_environment());
-    argument_count_ = 0;
-  } else if (block->predecessors()->length() == 1) {
-    // We have a single predecessor => copy environment and outgoing
-    // argument count from the predecessor.
-    DCHECK(block->phis()->length() == 0);
-    HBasicBlock* pred = block->predecessors()->at(0);
-    HEnvironment* last_environment = pred->last_environment();
-    DCHECK(last_environment != NULL);
-    // Only copy the environment, if it is later used again.
-    if (pred->end()->SecondSuccessor() == NULL) {
-      DCHECK(pred->end()->FirstSuccessor() == block);
-    } else {
-      if (pred->end()->FirstSuccessor()->block_id() > block->block_id() ||
-          pred->end()->SecondSuccessor()->block_id() > block->block_id()) {
-        last_environment = last_environment->Copy();
-      }
-    }
-    block->UpdateEnvironment(last_environment);
-    DCHECK(pred->argument_count() >= 0);
-    argument_count_ = pred->argument_count();
-  } else {
-    // We are at a state join => process phis.
-    HBasicBlock* pred = block->predecessors()->at(0);
-    // No need to copy the environment, it cannot be used later.
-    HEnvironment* last_environment = pred->last_environment();
-    for (int i = 0; i < block->phis()->length(); ++i) {
-      HPhi* phi = block->phis()->at(i);
-      if (phi->HasMergedIndex()) {
-        last_environment->SetValueAt(phi->merged_index(), phi);
-      }
-    }
-    for (int i = 0; i < block->deleted_phis()->length(); ++i) {
-      if (block->deleted_phis()->at(i) < last_environment->length()) {
-        last_environment->SetValueAt(block->deleted_phis()->at(i),
-                                     graph_->GetConstantUndefined());
-      }
-    }
-    block->UpdateEnvironment(last_environment);
-    // Pick up the outgoing argument count of one of the predecessors.
-    argument_count_ = pred->argument_count();
-  }
-  HInstruction* current = block->first();
-  int start = chunk_->instructions()->length();
-  while (current != NULL && !is_aborted()) {
-    // Code for constants in registers is generated lazily.
-    if (!current->EmitAtUses()) {
-      VisitInstruction(current);
-    }
-    current = current->next();
-  }
-  int end = chunk_->instructions()->length() - 1;
-  if (end >= start) {
-    block->set_first_instruction_index(start);
-    block->set_last_instruction_index(end);
-  }
-  block->set_argument_count(argument_count_);
-  next_block_ = NULL;
-  current_block_ = NULL;
-}
-
-
-void LChunkBuilder::VisitInstruction(HInstruction* current) {
-  HInstruction* old_current = current_instruction_;
-  current_instruction_ = current;
-
-  LInstruction* instr = NULL;
-  if (current->CanReplaceWithDummyUses()) {
-    if (current->OperandCount() == 0) {
-      instr = DefineAsRegister(new(zone()) LDummy());
-    } else {
-      DCHECK(!current->OperandAt(0)->IsControlInstruction());
-      instr = DefineAsRegister(new(zone())
-          LDummyUse(UseAny(current->OperandAt(0))));
-    }
-    for (int i = 1; i < current->OperandCount(); ++i) {
-      if (current->OperandAt(i)->IsControlInstruction()) continue;
-      LInstruction* dummy =
-          new(zone()) LDummyUse(UseAny(current->OperandAt(i)));
-      dummy->set_hydrogen_value(current);
-      chunk_->AddInstruction(dummy, current_block_);
-    }
-  } else {
-    HBasicBlock* successor;
-    if (current->IsControlInstruction() &&
-        HControlInstruction::cast(current)->KnownSuccessorBlock(&successor) &&
-        successor != NULL) {
-      instr = new(zone()) LGoto(successor);
-    } else {
-      instr = current->CompileToLithium(this);
-    }
-  }
-
-  argument_count_ += current->argument_delta();
-  DCHECK(argument_count_ >= 0);
-
-  if (instr != NULL) {
-    AddInstruction(instr, current);
-  }
-
-  current_instruction_ = old_current;
-}
-
-
-void LChunkBuilder::AddInstruction(LInstruction* instr,
-                                   HInstruction* hydrogen_val) {
-  // Associate the hydrogen instruction first, since we may need it for
-  // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below.
-  instr->set_hydrogen_value(hydrogen_val);
-
-#if DEBUG
-  // Make sure that the lithium instruction has either no fixed register
-  // constraints in temps or the result OR no uses that are only used at
-  // start. If this invariant doesn't hold, the register allocator can decide
-  // to insert a split of a range immediately before the instruction due to an
-  // already allocated register needing to be used for the instruction's fixed
-  // register constraint. In this case, The register allocator won't see an
-  // interference between the split child and the use-at-start (it would if
-  // the it was just a plain use), so it is free to move the split child into
-  // the same register that is used for the use-at-start.
-  // See https://code.google.com/p/chromium/issues/detail?id=201590
-  if (!(instr->ClobbersRegisters() &&
-        instr->ClobbersDoubleRegisters(isolate()))) {
-    int fixed = 0;
-    int used_at_start = 0;
-    for (UseIterator it(instr); !it.Done(); it.Advance()) {
-      LUnallocated* operand = LUnallocated::cast(it.Current());
-      if (operand->IsUsedAtStart()) ++used_at_start;
-    }
-    if (instr->Output() != NULL) {
-      if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed;
-    }
-    for (TempIterator it(instr); !it.Done(); it.Advance()) {
-      LUnallocated* operand = LUnallocated::cast(it.Current());
-      if (operand->HasFixedPolicy()) ++fixed;
-    }
-    DCHECK(fixed == 0 || used_at_start == 0);
-  }
-#endif
-
-  if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
-    instr = AssignPointerMap(instr);
-  }
-  if (FLAG_stress_environments && !instr->HasEnvironment()) {
-    instr = AssignEnvironment(instr);
-  }
-  chunk_->AddInstruction(instr, current_block_);
-
-  if (instr->IsCall() || instr->IsPrologue()) {
-    HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
-    if (hydrogen_val->HasObservableSideEffects()) {
-      HSimulate* sim = HSimulate::cast(hydrogen_val->next());
-      sim->ReplayEnvironment(current_block_->last_environment());
-      hydrogen_value_for_lazy_bailout = sim;
-    }
-    LInstruction* bailout = AssignEnvironment(new(zone()) LLazyBailout());
-    bailout->set_hydrogen_value(hydrogen_value_for_lazy_bailout);
-    chunk_->AddInstruction(bailout, current_block_);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) {
-  return new (zone()) LPrologue();
-}
-
-
-LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
-  return new(zone()) LGoto(instr->FirstSuccessor());
-}
-
-
-LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
-  HValue* value = instr->value();
-  Representation r = value->representation();
-  HType type = value->type();
-  ToBooleanStub::Types expected = instr->expected_input_types();
-  if (expected.IsEmpty()) expected = ToBooleanStub::Types::Generic();
-
-  bool easy_case = !r.IsTagged() || type.IsBoolean() || type.IsSmi() ||
-      type.IsJSArray() || type.IsHeapNumber() || type.IsString();
-  LOperand* temp = !easy_case && expected.NeedsMap() ? TempRegister() : NULL;
-  LInstruction* branch = new(zone()) LBranch(UseRegister(value), temp);
-  if (!easy_case &&
-      ((!expected.Contains(ToBooleanStub::SMI) && expected.NeedsMap()) ||
-       !expected.IsGeneric())) {
-    branch = AssignEnvironment(branch);
-  }
-  return branch;
-}
-
-
-LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) {
-  return new(zone()) LDebugBreak();
-}
-
-
-LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  LOperand* value = UseRegisterAtStart(instr->value());
-  return new(zone()) LCmpMapAndBranch(value);
-}
-
-
-LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
-  info()->MarkAsRequiresFrame();
-  return DefineAsRegister(new(zone()) LArgumentsLength(Use(length->value())));
-}
-
-
-LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
-  info()->MarkAsRequiresFrame();
-  return DefineAsRegister(new(zone()) LArgumentsElements);
-}
-
-
-LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
-  LOperand* left =
-      UseFixed(instr->left(), InstanceOfDescriptor::LeftRegister());
-  LOperand* right =
-      UseFixed(instr->right(), InstanceOfDescriptor::RightRegister());
-  LOperand* context = UseFixed(instr->context(), esi);
-  LInstanceOf* result = new (zone()) LInstanceOf(context, left, right);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch(
-    HHasInPrototypeChainAndBranch* instr) {
-  LOperand* object = UseRegister(instr->object());
-  LOperand* prototype = UseRegister(instr->prototype());
-  LOperand* temp = TempRegister();
-  return new (zone()) LHasInPrototypeChainAndBranch(object, prototype, temp);
-}
-
-
-LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
-  LOperand* receiver = UseRegister(instr->receiver());
-  LOperand* function = UseRegister(instr->function());
-  LOperand* temp = TempRegister();
-  LWrapReceiver* result =
-      new(zone()) LWrapReceiver(receiver, function, temp);
-  return AssignEnvironment(DefineSameAsFirst(result));
-}
-
-
-LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
-  LOperand* function = UseFixed(instr->function(), edi);
-  LOperand* receiver = UseFixed(instr->receiver(), eax);
-  LOperand* length = UseFixed(instr->length(), ebx);
-  LOperand* elements = UseFixed(instr->elements(), ecx);
-  LApplyArguments* result = new(zone()) LApplyArguments(function,
-                                                        receiver,
-                                                        length,
-                                                        elements);
-  return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
-  int argc = instr->OperandCount();
-  for (int i = 0; i < argc; ++i) {
-    LOperand* argument = UseAny(instr->argument(i));
-    AddInstruction(new(zone()) LPushArgument(argument), instr);
-  }
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoStoreCodeEntry(
-    HStoreCodeEntry* store_code_entry) {
-  LOperand* function = UseRegister(store_code_entry->function());
-  LOperand* code_object = UseTempRegister(store_code_entry->code_object());
-  return new(zone()) LStoreCodeEntry(function, code_object);
-}
-
-
-LInstruction* LChunkBuilder::DoInnerAllocatedObject(
-    HInnerAllocatedObject* instr) {
-  LOperand* base_object = UseRegisterAtStart(instr->base_object());
-  LOperand* offset = UseRegisterOrConstantAtStart(instr->offset());
-  return DefineAsRegister(
-      new(zone()) LInnerAllocatedObject(base_object, offset));
-}
-
-
-LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
-  return instr->HasNoUses()
-      ? NULL
-      : DefineAsRegister(new(zone()) LThisFunction);
-}
-
-
-LInstruction* LChunkBuilder::DoContext(HContext* instr) {
-  if (instr->HasNoUses()) return NULL;
-
-  if (info()->IsStub()) {
-    return DefineFixed(new(zone()) LContext, esi);
-  }
-
-  return DefineAsRegister(new(zone()) LContext);
-}
-
-
-LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  return MarkAsCall(new(zone()) LDeclareGlobals(context), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoCallJSFunction(
-    HCallJSFunction* instr) {
-  LOperand* function = UseFixed(instr->function(), edi);
-
-  LCallJSFunction* result = new(zone()) LCallJSFunction(function);
-
-  return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoCallWithDescriptor(
-    HCallWithDescriptor* instr) {
-  CallInterfaceDescriptor descriptor = instr->descriptor();
-  LOperand* target = UseRegisterOrConstantAtStart(instr->target());
-  ZoneList<LOperand*> ops(instr->OperandCount(), zone());
-  // Target
-  ops.Add(target, zone());
-  // Context
-  LOperand* op = UseFixed(instr->OperandAt(1), esi);
-  ops.Add(op, zone());
-  // Other register parameters
-  for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount;
-       i < instr->OperandCount(); i++) {
-    op =
-        UseFixed(instr->OperandAt(i),
-                 descriptor.GetRegisterParameter(
-                     i - LCallWithDescriptor::kImplicitRegisterParameterCount));
-    ops.Add(op, zone());
-  }
-
-  LCallWithDescriptor* result = new(zone()) LCallWithDescriptor(
-      descriptor, ops, zone());
-  return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* function = UseFixed(instr->function(), edi);
-  LInvokeFunction* result = new(zone()) LInvokeFunction(context, function);
-  return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
-  switch (instr->op()) {
-    case kMathFloor:
-      return DoMathFloor(instr);
-    case kMathRound:
-      return DoMathRound(instr);
-    case kMathFround:
-      return DoMathFround(instr);
-    case kMathAbs:
-      return DoMathAbs(instr);
-    case kMathLog:
-      return DoMathLog(instr);
-    case kMathExp:
-      return DoMathExp(instr);
-    case kMathSqrt:
-      return DoMathSqrt(instr);
-    case kMathPowHalf:
-      return DoMathPowHalf(instr);
-    case kMathClz32:
-      return DoMathClz32(instr);
-    default:
-      UNREACHABLE();
-      return NULL;
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegisterAtStart(instr->value());
-  LMathFloor* result = new(zone()) LMathFloor(input);
-  return AssignEnvironment(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegister(instr->value());
-  LOperand* temp = FixedTemp(xmm4);
-  LMathRound* result = new(zone()) LMathRound(input, temp);
-  return AssignEnvironment(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoMathFround(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegister(instr->value());
-  LMathFround* result = new (zone()) LMathFround(input);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) {
-  LOperand* context = UseAny(instr->context());  // Deferred use.
-  LOperand* input = UseRegisterAtStart(instr->value());
-  LInstruction* result =
-      DefineSameAsFirst(new(zone()) LMathAbs(context, input));
-  Representation r = instr->value()->representation();
-  if (!r.IsDouble() && !r.IsSmiOrInteger32()) result = AssignPointerMap(result);
-  if (!r.IsDouble()) result = AssignEnvironment(result);
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoMathLog(HUnaryMathOperation* instr) {
-  DCHECK(instr->representation().IsDouble());
-  DCHECK(instr->value()->representation().IsDouble());
-  LOperand* input = UseRegisterAtStart(instr->value());
-  return MarkAsCall(DefineSameAsFirst(new(zone()) LMathLog(input)), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegisterAtStart(instr->value());
-  LMathClz32* result = new(zone()) LMathClz32(input);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
-  DCHECK(instr->representation().IsDouble());
-  DCHECK(instr->value()->representation().IsDouble());
-  LOperand* value = UseTempRegister(instr->value());
-  LOperand* temp1 = TempRegister();
-  LOperand* temp2 = TempRegister();
-  LMathExp* result = new(zone()) LMathExp(value, temp1, temp2);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) {
-  LOperand* input = UseAtStart(instr->value());
-  return DefineAsRegister(new(zone()) LMathSqrt(input));
-}
-
-
-LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegisterAtStart(instr->value());
-  LOperand* temp = TempRegister();
-  LMathPowHalf* result = new(zone()) LMathPowHalf(input, temp);
-  return DefineSameAsFirst(result);
-}
-
-
-LInstruction* LChunkBuilder::DoCallNew(HCallNew* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* constructor = UseFixed(instr->constructor(), edi);
-  LCallNew* result = new(zone()) LCallNew(context, constructor);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* constructor = UseFixed(instr->constructor(), edi);
-  LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* function = UseFixed(instr->function(), edi);
-  LOperand* slot = NULL;
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    slot = FixedTemp(edx);
-    vector = FixedTemp(ebx);
-  }
-
-  LCallFunction* call =
-      new (zone()) LCallFunction(context, function, slot, vector);
-  return MarkAsCall(DefineFixed(call, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoRor(HRor* instr) {
-  return DoShift(Token::ROR, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoShr(HShr* instr) {
-  return DoShift(Token::SHR, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoSar(HSar* instr) {
-  return DoShift(Token::SAR, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoShl(HShl* instr) {
-  return DoShift(Token::SHL, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    DCHECK(instr->CheckFlag(HValue::kTruncatingToInt32));
-
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
-    LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand());
-    return DefineSameAsFirst(new(zone()) LBitI(left, right));
-  } else {
-    return DoArithmeticT(instr->op(), instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoDivByPowerOf2I(HDiv* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseRegister(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LInstruction* result = DefineAsRegister(new(zone()) LDivByPowerOf2I(
-          dividend, divisor));
-  if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
-      (instr->CheckFlag(HValue::kCanOverflow) && divisor == -1) ||
-      (!instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) &&
-       divisor != 1 && divisor != -1)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoDivByConstI(HDiv* instr) {
-  DCHECK(instr->representation().IsInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseRegister(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LOperand* temp1 = FixedTemp(eax);
-  LOperand* temp2 = FixedTemp(edx);
-  LInstruction* result = DefineFixed(new(zone()) LDivByConstI(
-          dividend, divisor, temp1, temp2), edx);
-  if (divisor == 0 ||
-      (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
-      !instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoDivI(HDiv* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseFixed(instr->left(), eax);
-  LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = FixedTemp(edx);
-  LInstruction* result = DefineFixed(new(zone()) LDivI(
-          dividend, divisor, temp), eax);
-  if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
-      instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
-      instr->CheckFlag(HValue::kCanOverflow) ||
-      !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    if (instr->RightIsPowerOf2()) {
-      return DoDivByPowerOf2I(instr);
-    } else if (instr->right()->IsConstant()) {
-      return DoDivByConstI(instr);
-    } else {
-      return DoDivI(instr);
-    }
-  } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::DIV, instr);
-  } else {
-    return DoArithmeticT(Token::DIV, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr) {
-  LOperand* dividend = UseRegisterAtStart(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LInstruction* result = DefineSameAsFirst(new(zone()) LFlooringDivByPowerOf2I(
-          dividend, divisor));
-  if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
-      (instr->CheckFlag(HValue::kLeftCanBeMinInt) && divisor == -1)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoFlooringDivByConstI(HMathFloorOfDiv* instr) {
-  DCHECK(instr->representation().IsInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseRegister(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LOperand* temp1 = FixedTemp(eax);
-  LOperand* temp2 = FixedTemp(edx);
-  LOperand* temp3 =
-      ((divisor > 0 && !instr->CheckFlag(HValue::kLeftCanBeNegative)) ||
-       (divisor < 0 && !instr->CheckFlag(HValue::kLeftCanBePositive))) ?
-      NULL : TempRegister();
-  LInstruction* result =
-      DefineFixed(new(zone()) LFlooringDivByConstI(dividend,
-                                                   divisor,
-                                                   temp1,
-                                                   temp2,
-                                                   temp3),
-                  edx);
-  if (divisor == 0 ||
-      (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseFixed(instr->left(), eax);
-  LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = FixedTemp(edx);
-  LInstruction* result = DefineFixed(new(zone()) LFlooringDivI(
-          dividend, divisor, temp), eax);
-  if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
-      instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
-      instr->CheckFlag(HValue::kCanOverflow)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
-  if (instr->RightIsPowerOf2()) {
-    return DoFlooringDivByPowerOf2I(instr);
-  } else if (instr->right()->IsConstant()) {
-    return DoFlooringDivByConstI(instr);
-  } else {
-    return DoFlooringDivI(instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoModByPowerOf2I(HMod* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseRegisterAtStart(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LInstruction* result = DefineSameAsFirst(new(zone()) LModByPowerOf2I(
-          dividend, divisor));
-  if (instr->CheckFlag(HValue::kLeftCanBeNegative) &&
-      instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoModByConstI(HMod* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseRegister(instr->left());
-  int32_t divisor = instr->right()->GetInteger32Constant();
-  LOperand* temp1 = FixedTemp(eax);
-  LOperand* temp2 = FixedTemp(edx);
-  LInstruction* result = DefineFixed(new(zone()) LModByConstI(
-          dividend, divisor, temp1, temp2), eax);
-  if (divisor == 0 || instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoModI(HMod* instr) {
-  DCHECK(instr->representation().IsSmiOrInteger32());
-  DCHECK(instr->left()->representation().Equals(instr->representation()));
-  DCHECK(instr->right()->representation().Equals(instr->representation()));
-  LOperand* dividend = UseFixed(instr->left(), eax);
-  LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = FixedTemp(edx);
-  LInstruction* result = DefineFixed(new(zone()) LModI(
-          dividend, divisor, temp), edx);
-  if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
-      instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoMod(HMod* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    if (instr->RightIsPowerOf2()) {
-      return DoModByPowerOf2I(instr);
-    } else if (instr->right()->IsConstant()) {
-      return DoModByConstI(instr);
-    } else {
-      return DoModI(instr);
-    }
-  } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::MOD, instr);
-  } else {
-    return DoArithmeticT(Token::MOD, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoMul(HMul* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
-    LOperand* right = UseOrConstant(instr->BetterRightOperand());
-    LOperand* temp = NULL;
-    if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
-      temp = TempRegister();
-    }
-    LMulI* mul = new(zone()) LMulI(left, right, temp);
-    if (instr->CheckFlag(HValue::kCanOverflow) ||
-        instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
-      AssignEnvironment(mul);
-    }
-    return DefineSameAsFirst(mul);
-  } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::MUL, instr);
-  } else {
-    return DoArithmeticT(Token::MUL, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoSub(HSub* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    LOperand* left = UseRegisterAtStart(instr->left());
-    LOperand* right = UseOrConstantAtStart(instr->right());
-    LSubI* sub = new(zone()) LSubI(left, right);
-    LInstruction* result = DefineSameAsFirst(sub);
-    if (instr->CheckFlag(HValue::kCanOverflow)) {
-      result = AssignEnvironment(result);
-    }
-    return result;
-  } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::SUB, instr);
-  } else {
-    return DoArithmeticT(Token::SUB, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    // Check to see if it would be advantageous to use an lea instruction rather
-    // than an add. This is the case when no overflow check is needed and there
-    // are multiple uses of the add's inputs, so using a 3-register add will
-    // preserve all input values for later uses.
-    bool use_lea = LAddI::UseLea(instr);
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
-    HValue* right_candidate = instr->BetterRightOperand();
-    LOperand* right = use_lea
-        ? UseRegisterOrConstantAtStart(right_candidate)
-        : UseOrConstantAtStart(right_candidate);
-    LAddI* add = new(zone()) LAddI(left, right);
-    bool can_overflow = instr->CheckFlag(HValue::kCanOverflow);
-    LInstruction* result = use_lea
-        ? DefineAsRegister(add)
-        : DefineSameAsFirst(add);
-    if (can_overflow) {
-      result = AssignEnvironment(result);
-    }
-    return result;
-  } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::ADD, instr);
-  } else if (instr->representation().IsExternal()) {
-    DCHECK(instr->IsConsistentExternalRepresentation());
-    DCHECK(!instr->CheckFlag(HValue::kCanOverflow));
-    bool use_lea = LAddI::UseLea(instr);
-    LOperand* left = UseRegisterAtStart(instr->left());
-    HValue* right_candidate = instr->right();
-    LOperand* right = use_lea
-        ? UseRegisterOrConstantAtStart(right_candidate)
-        : UseOrConstantAtStart(right_candidate);
-    LAddI* add = new(zone()) LAddI(left, right);
-    LInstruction* result = use_lea
-        ? DefineAsRegister(add)
-        : DefineSameAsFirst(add);
-    return result;
-  } else {
-    return DoArithmeticT(Token::ADD, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) {
-  LOperand* left = NULL;
-  LOperand* right = NULL;
-  if (instr->representation().IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(instr->representation()));
-    DCHECK(instr->right()->representation().Equals(instr->representation()));
-    left = UseRegisterAtStart(instr->BetterLeftOperand());
-    right = UseOrConstantAtStart(instr->BetterRightOperand());
-  } else {
-    DCHECK(instr->representation().IsDouble());
-    DCHECK(instr->left()->representation().IsDouble());
-    DCHECK(instr->right()->representation().IsDouble());
-    left = UseRegisterAtStart(instr->left());
-    right = UseRegisterAtStart(instr->right());
-  }
-  LMathMinMax* minmax = new(zone()) LMathMinMax(left, right);
-  return DefineSameAsFirst(minmax);
-}
-
-
-LInstruction* LChunkBuilder::DoPower(HPower* instr) {
-  DCHECK(instr->representation().IsDouble());
-  // We call a C function for double power. It can't trigger a GC.
-  // We need to use fixed result register for the call.
-  Representation exponent_type = instr->right()->representation();
-  DCHECK(instr->left()->representation().IsDouble());
-  LOperand* left = UseFixedDouble(instr->left(), xmm2);
-  LOperand* right =
-      exponent_type.IsDouble()
-          ? UseFixedDouble(instr->right(), xmm1)
-          : UseFixed(instr->right(), MathPowTaggedDescriptor::exponent());
-  LPower* result = new(zone()) LPower(left, right);
-  return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
-                    CAN_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
-  DCHECK(instr->left()->representation().IsSmiOrTagged());
-  DCHECK(instr->right()->representation().IsSmiOrTagged());
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* left = UseFixed(instr->left(), edx);
-  LOperand* right = UseFixed(instr->right(), eax);
-  LCmpT* result = new(zone()) LCmpT(context, left, right);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoCompareNumericAndBranch(
-    HCompareNumericAndBranch* instr) {
-  Representation r = instr->representation();
-  if (r.IsSmiOrInteger32()) {
-    DCHECK(instr->left()->representation().Equals(r));
-    DCHECK(instr->right()->representation().Equals(r));
-    LOperand* left = UseRegisterOrConstantAtStart(instr->left());
-    LOperand* right = UseOrConstantAtStart(instr->right());
-    return new(zone()) LCompareNumericAndBranch(left, right);
-  } else {
-    DCHECK(r.IsDouble());
-    DCHECK(instr->left()->representation().IsDouble());
-    DCHECK(instr->right()->representation().IsDouble());
-    LOperand* left;
-    LOperand* right;
-    if (CanBeImmediateConstant(instr->left()) &&
-        CanBeImmediateConstant(instr->right())) {
-      // The code generator requires either both inputs to be constant
-      // operands, or neither.
-      left = UseConstant(instr->left());
-      right = UseConstant(instr->right());
-    } else {
-      left = UseRegisterAtStart(instr->left());
-      right = UseRegisterAtStart(instr->right());
-    }
-    return new(zone()) LCompareNumericAndBranch(left, right);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
-    HCompareObjectEqAndBranch* instr) {
-  LOperand* left = UseRegisterAtStart(instr->left());
-  LOperand* right = UseOrConstantAtStart(instr->right());
-  return new(zone()) LCmpObjectEqAndBranch(left, right);
-}
-
-
-LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
-    HCompareHoleAndBranch* instr) {
-  LOperand* value = UseRegisterAtStart(instr->value());
-  return new(zone()) LCmpHoleAndBranch(value);
-}
-
-
-LInstruction* LChunkBuilder::DoCompareMinusZeroAndBranch(
-    HCompareMinusZeroAndBranch* instr) {
-  LOperand* value = UseRegister(instr->value());
-  LOperand* scratch = TempRegister();
-  return new(zone()) LCompareMinusZeroAndBranch(value, scratch);
-}
-
-
-LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  LOperand* temp = TempRegister();
-  return new(zone()) LIsStringAndBranch(UseRegister(instr->value()), temp);
-}
-
-
-LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  return new(zone()) LIsSmiAndBranch(Use(instr->value()));
-}
-
-
-LInstruction* LChunkBuilder::DoIsUndetectableAndBranch(
-    HIsUndetectableAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  return new(zone()) LIsUndetectableAndBranch(
-      UseRegisterAtStart(instr->value()), TempRegister());
-}
-
-
-LInstruction* LChunkBuilder::DoStringCompareAndBranch(
-    HStringCompareAndBranch* instr) {
-  DCHECK(instr->left()->representation().IsTagged());
-  DCHECK(instr->right()->representation().IsTagged());
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* left = UseFixed(instr->left(), edx);
-  LOperand* right = UseFixed(instr->right(), eax);
-
-  LStringCompareAndBranch* result = new(zone())
-      LStringCompareAndBranch(context, left, right);
-
-  return MarkAsCall(result, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
-    HHasInstanceTypeAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  return new(zone()) LHasInstanceTypeAndBranch(
-      UseRegisterAtStart(instr->value()),
-      TempRegister());
-}
-
-
-LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
-    HGetCachedArrayIndex* instr)  {
-  DCHECK(instr->value()->representation().IsTagged());
-  LOperand* value = UseRegisterAtStart(instr->value());
-
-  return DefineAsRegister(new(zone()) LGetCachedArrayIndex(value));
-}
-
-
-LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch(
-    HHasCachedArrayIndexAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  return new(zone()) LHasCachedArrayIndexAndBranch(
-      UseRegisterAtStart(instr->value()));
-}
-
-
-LInstruction* LChunkBuilder::DoClassOfTestAndBranch(
-    HClassOfTestAndBranch* instr) {
-  DCHECK(instr->value()->representation().IsTagged());
-  return new(zone()) LClassOfTestAndBranch(UseRegister(instr->value()),
-                                           TempRegister(),
-                                           TempRegister());
-}
-
-
-LInstruction* LChunkBuilder::DoMapEnumLength(HMapEnumLength* instr) {
-  LOperand* map = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new(zone()) LMapEnumLength(map));
-}
-
-
-LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
-  LOperand* date = UseFixed(instr->value(), eax);
-  LDateField* result =
-      new(zone()) LDateField(date, FixedTemp(ecx), instr->index());
-  return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
-  LOperand* string = UseRegisterAtStart(instr->string());
-  LOperand* index = UseRegisterOrConstantAtStart(instr->index());
-  return DefineAsRegister(new(zone()) LSeqStringGetChar(string, index));
-}
-
-
-LOperand* LChunkBuilder::GetSeqStringSetCharOperand(HSeqStringSetChar* instr) {
-  if (instr->encoding() == String::ONE_BYTE_ENCODING) {
-    if (FLAG_debug_code) {
-      return UseFixed(instr->value(), eax);
-    } else {
-      return UseFixedOrConstant(instr->value(), eax);
-    }
-  } else {
-    if (FLAG_debug_code) {
-      return UseRegisterAtStart(instr->value());
-    } else {
-      return UseRegisterOrConstantAtStart(instr->value());
-    }
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
-  LOperand* string = UseRegisterAtStart(instr->string());
-  LOperand* index = FLAG_debug_code
-      ? UseRegisterAtStart(instr->index())
-      : UseRegisterOrConstantAtStart(instr->index());
-  LOperand* value = GetSeqStringSetCharOperand(instr);
-  LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), esi) : NULL;
-  LInstruction* result = new(zone()) LSeqStringSetChar(context, string,
-                                                       index, value);
-  if (FLAG_debug_code) {
-    result = MarkAsCall(result, instr);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
-  if (!FLAG_debug_code && instr->skip_check()) return NULL;
-  LOperand* index = UseRegisterOrConstantAtStart(instr->index());
-  LOperand* length = !index->IsConstantOperand()
-      ? UseOrConstantAtStart(instr->length())
-      : UseAtStart(instr->length());
-  LInstruction* result = new(zone()) LBoundsCheck(index, length);
-  if (!FLAG_debug_code || !instr->skip_check()) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoBoundsCheckBaseIndexInformation(
-    HBoundsCheckBaseIndexInformation* instr) {
-  UNREACHABLE();
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
-  // The control instruction marking the end of a block that completed
-  // abruptly (e.g., threw an exception).  There is nothing specific to do.
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoForceRepresentation(HForceRepresentation* bad) {
-  // All HForceRepresentation instructions should be eliminated in the
-  // representation change phase of Hydrogen.
-  UNREACHABLE();
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoChange(HChange* instr) {
-  Representation from = instr->from();
-  Representation to = instr->to();
-  HValue* val = instr->value();
-  if (from.IsSmi()) {
-    if (to.IsTagged()) {
-      LOperand* value = UseRegister(val);
-      return DefineSameAsFirst(new(zone()) LDummyUse(value));
-    }
-    from = Representation::Tagged();
-  }
-  if (from.IsTagged()) {
-    if (to.IsDouble()) {
-      LOperand* value = UseRegister(val);
-      LOperand* temp = TempRegister();
-      LInstruction* result =
-          DefineAsRegister(new(zone()) LNumberUntagD(value, temp));
-      if (!val->representation().IsSmi()) result = AssignEnvironment(result);
-      return result;
-    } else if (to.IsSmi()) {
-      LOperand* value = UseRegister(val);
-      if (val->type().IsSmi()) {
-        return DefineSameAsFirst(new(zone()) LDummyUse(value));
-      }
-      return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value)));
-    } else {
-      DCHECK(to.IsInteger32());
-      if (val->type().IsSmi() || val->representation().IsSmi()) {
-        LOperand* value = UseRegister(val);
-        return DefineSameAsFirst(new(zone()) LSmiUntag(value, false));
-      } else {
-        LOperand* value = UseRegister(val);
-        bool truncating = instr->CanTruncateToInt32();
-        LOperand* xmm_temp = !truncating ? FixedTemp(xmm1) : NULL;
-        LInstruction* result =
-            DefineSameAsFirst(new(zone()) LTaggedToI(value, xmm_temp));
-        if (!val->representation().IsSmi()) result = AssignEnvironment(result);
-        return result;
-      }
-    }
-  } else if (from.IsDouble()) {
-    if (to.IsTagged()) {
-      info()->MarkAsDeferredCalling();
-      LOperand* value = UseRegisterAtStart(val);
-      LOperand* temp = FLAG_inline_new ? TempRegister() : NULL;
-      LUnallocated* result_temp = TempRegister();
-      LNumberTagD* result = new(zone()) LNumberTagD(value, temp);
-      return AssignPointerMap(Define(result, result_temp));
-    } else if (to.IsSmi()) {
-      LOperand* value = UseRegister(val);
-      return AssignEnvironment(
-          DefineAsRegister(new(zone()) LDoubleToSmi(value)));
-    } else {
-      DCHECK(to.IsInteger32());
-      bool truncating = instr->CanTruncateToInt32();
-      bool needs_temp = !truncating;
-      LOperand* value = needs_temp ? UseTempRegister(val) : UseRegister(val);
-      LOperand* temp = needs_temp ? TempRegister() : NULL;
-      LInstruction* result =
-          DefineAsRegister(new(zone()) LDoubleToI(value, temp));
-      if (!truncating) result = AssignEnvironment(result);
-      return result;
-    }
-  } else if (from.IsInteger32()) {
-    info()->MarkAsDeferredCalling();
-    if (to.IsTagged()) {
-      LOperand* value = UseRegister(val);
-      if (!instr->CheckFlag(HValue::kCanOverflow)) {
-        return DefineSameAsFirst(new(zone()) LSmiTag(value));
-      } else if (val->CheckFlag(HInstruction::kUint32)) {
-        LOperand* temp = TempRegister();
-        LNumberTagU* result = new(zone()) LNumberTagU(value, temp);
-        return AssignPointerMap(DefineSameAsFirst(result));
-      } else {
-        LOperand* temp = TempRegister();
-        LNumberTagI* result = new(zone()) LNumberTagI(value, temp);
-        return AssignPointerMap(DefineSameAsFirst(result));
-      }
-    } else if (to.IsSmi()) {
-      LOperand* value = UseRegister(val);
-      LInstruction* result = DefineSameAsFirst(new(zone()) LSmiTag(value));
-      if (instr->CheckFlag(HValue::kCanOverflow)) {
-        result = AssignEnvironment(result);
-      }
-      return result;
-    } else {
-      DCHECK(to.IsDouble());
-      if (val->CheckFlag(HInstruction::kUint32)) {
-        return DefineAsRegister(new(zone()) LUint32ToDouble(UseRegister(val)));
-      } else {
-        return DefineAsRegister(new(zone()) LInteger32ToDouble(Use(val)));
-      }
-    }
-  }
-  UNREACHABLE();
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
-  LOperand* value = UseAtStart(instr->value());
-  LInstruction* result = new(zone()) LCheckNonSmi(value);
-  if (!instr->value()->type().IsHeapObject()) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
-  LOperand* value = UseRegisterAtStart(instr->value());
-  return AssignEnvironment(new(zone()) LCheckSmi(value));
-}
-
-
-LInstruction* LChunkBuilder::DoCheckArrayBufferNotNeutered(
-    HCheckArrayBufferNotNeutered* instr) {
-  LOperand* view = UseRegisterAtStart(instr->value());
-  LOperand* scratch = TempRegister();
-  LCheckArrayBufferNotNeutered* result =
-      new (zone()) LCheckArrayBufferNotNeutered(view, scratch);
-  return AssignEnvironment(result);
-}
-
-
-LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
-  LOperand* value = UseRegisterAtStart(instr->value());
-  LOperand* temp = TempRegister();
-  LCheckInstanceType* result = new(zone()) LCheckInstanceType(value, temp);
-  return AssignEnvironment(result);
-}
-
-
-LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) {
-  // If the object is in new space, we'll emit a global cell compare and so
-  // want the value in a register.  If the object gets promoted before we
-  // emit code, we will still get the register but will do an immediate
-  // compare instead of the cell compare.  This is safe.
-  LOperand* value = instr->object_in_new_space()
-      ? UseRegisterAtStart(instr->value()) : UseAtStart(instr->value());
-  return AssignEnvironment(new(zone()) LCheckValue(value));
-}
-
-
-LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
-  if (instr->IsStabilityCheck()) return new(zone()) LCheckMaps;
-  LOperand* value = UseRegisterAtStart(instr->value());
-  LInstruction* result = AssignEnvironment(new(zone()) LCheckMaps(value));
-  if (instr->HasMigrationTarget()) {
-    info()->MarkAsDeferredCalling();
-    result = AssignPointerMap(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
-  HValue* value = instr->value();
-  Representation input_rep = value->representation();
-  if (input_rep.IsDouble()) {
-    LOperand* reg = UseRegister(value);
-    return DefineFixed(new(zone()) LClampDToUint8(reg), eax);
-  } else if (input_rep.IsInteger32()) {
-    LOperand* reg = UseFixed(value, eax);
-    return DefineFixed(new(zone()) LClampIToUint8(reg), eax);
-  } else {
-    DCHECK(input_rep.IsSmiOrTagged());
-    LOperand* reg = UseFixed(value, eax);
-    // Register allocator doesn't (yet) support allocation of double
-    // temps. Reserve xmm1 explicitly.
-    LOperand* temp = FixedTemp(xmm1);
-    LClampTToUint8* result = new(zone()) LClampTToUint8(reg, temp);
-    return AssignEnvironment(DefineFixed(result, eax));
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
-  HValue* value = instr->value();
-  DCHECK(value->representation().IsDouble());
-  return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
-}
-
-
-LInstruction* LChunkBuilder::DoConstructDouble(HConstructDouble* instr) {
-  LOperand* lo = UseRegister(instr->lo());
-  LOperand* hi = UseRegister(instr->hi());
-  return DefineAsRegister(new(zone()) LConstructDouble(hi, lo));
-}
-
-
-LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
-  LOperand* context = info()->IsStub() ? UseFixed(instr->context(), esi) : NULL;
-  LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
-  return new(zone()) LReturn(
-      UseFixed(instr->value(), eax), context, parameter_count);
-}
-
-
-LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
-  Representation r = instr->representation();
-  if (r.IsSmi()) {
-    return DefineAsRegister(new(zone()) LConstantS);
-  } else if (r.IsInteger32()) {
-    return DefineAsRegister(new(zone()) LConstantI);
-  } else if (r.IsDouble()) {
-    uint64_t const bits = instr->DoubleValueAsBits();
-    LOperand* temp = bits ? TempRegister() : nullptr;
-    return DefineAsRegister(new(zone()) LConstantD(temp));
-  } else if (r.IsExternal()) {
-    return DefineAsRegister(new(zone()) LConstantE);
-  } else if (r.IsTagged()) {
-    return DefineAsRegister(new(zone()) LConstantT);
-  } else {
-    UNREACHABLE();
-    return NULL;
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* global_object =
-      UseFixed(instr->global_object(), LoadDescriptor::ReceiverRegister());
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
-  }
-
-  LLoadGlobalGeneric* result =
-      new(zone()) LLoadGlobalGeneric(context, global_object, vector);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadGlobalViaContext(
-    HLoadGlobalViaContext* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  DCHECK(instr->slot_index() > 0);
-  LLoadGlobalViaContext* result = new (zone()) LLoadGlobalViaContext(context);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
-  LOperand* context = UseRegisterAtStart(instr->value());
-  LInstruction* result =
-      DefineAsRegister(new(zone()) LLoadContextSlot(context));
-  if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) {
-  LOperand* value;
-  LOperand* temp;
-  LOperand* context = UseRegister(instr->context());
-  if (instr->NeedsWriteBarrier()) {
-    value = UseTempRegister(instr->value());
-    temp = TempRegister();
-  } else {
-    value = UseRegister(instr->value());
-    temp = NULL;
-  }
-  LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp);
-  if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
-  LOperand* obj = (instr->access().IsExternalMemory() &&
-                   instr->access().offset() == 0)
-      ? UseRegisterOrConstantAtStart(instr->object())
-      : UseRegisterAtStart(instr->object());
-  return DefineAsRegister(new(zone()) LLoadNamedField(obj));
-}
-
-
-LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object =
-      UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
-  }
-  LLoadNamedGeneric* result = new(zone()) LLoadNamedGeneric(
-      context, object, vector);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
-    HLoadFunctionPrototype* instr) {
-  return AssignEnvironment(DefineAsRegister(
-      new(zone()) LLoadFunctionPrototype(UseRegister(instr->function()),
-                                         TempRegister())));
-}
-
-
-LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
-  return DefineAsRegister(new(zone()) LLoadRoot);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
-  DCHECK(instr->key()->representation().IsSmiOrInteger32());
-  ElementsKind elements_kind = instr->elements_kind();
-  bool clobbers_key = ExternalArrayOpRequiresTemp(
-      instr->key()->representation(), elements_kind);
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  LInstruction* result = NULL;
-
-  if (!instr->is_fixed_typed_array()) {
-    LOperand* obj = UseRegisterAtStart(instr->elements());
-    result = DefineAsRegister(new(zone()) LLoadKeyed(obj, key));
-  } else {
-    DCHECK(
-        (instr->representation().IsInteger32() &&
-         !(IsDoubleOrFloatElementsKind(instr->elements_kind()))) ||
-        (instr->representation().IsDouble() &&
-         (IsDoubleOrFloatElementsKind(instr->elements_kind()))));
-    LOperand* backing_store = UseRegister(instr->elements());
-    result = DefineAsRegister(new(zone()) LLoadKeyed(backing_store, key));
-  }
-
-  bool needs_environment;
-  if (instr->is_fixed_typed_array()) {
-    // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = elements_kind == UINT32_ELEMENTS &&
-                        !instr->CheckFlag(HInstruction::kUint32);
-  } else {
-    // see LCodeGen::DoLoadKeyedFixedDoubleArray and
-    // LCodeGen::DoLoadKeyedFixedArray
-    needs_environment =
-        instr->RequiresHoleCheck() ||
-        (instr->hole_mode() == CONVERT_HOLE_TO_UNDEFINED && info()->IsStub());
-  }
-
-  if (needs_environment) {
-    result = AssignEnvironment(result);
-  }
-  return result;
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object =
-      UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
-  LOperand* key = UseFixed(instr->key(), LoadDescriptor::NameRegister());
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
-  }
-  LLoadKeyedGeneric* result =
-      new(zone()) LLoadKeyedGeneric(context, object, key, vector);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-
-  // Determine if we need a byte register in this case for the value.
-  bool val_is_fixed_register =
-      elements_kind == UINT8_ELEMENTS ||
-      elements_kind == INT8_ELEMENTS ||
-      elements_kind == UINT8_CLAMPED_ELEMENTS;
-  if (val_is_fixed_register) {
-    return UseFixed(instr->value(), eax);
-  }
-
-  return UseRegister(instr->value());
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_fixed_typed_array()) {
-    DCHECK(instr->elements()->representation().IsTagged());
-    DCHECK(instr->key()->representation().IsInteger32() ||
-           instr->key()->representation().IsSmi());
-
-    if (instr->value()->representation().IsDouble()) {
-      LOperand* object = UseRegisterAtStart(instr->elements());
-      LOperand* val = NULL;
-      val = UseRegisterAtStart(instr->value());
-      LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-      return new(zone()) LStoreKeyed(object, key, val);
-    } else {
-      DCHECK(instr->value()->representation().IsSmiOrTagged());
-      bool needs_write_barrier = instr->NeedsWriteBarrier();
-
-      LOperand* obj = UseRegister(instr->elements());
-      LOperand* val;
-      LOperand* key;
-      if (needs_write_barrier) {
-        val = UseTempRegister(instr->value());
-        key = UseTempRegister(instr->key());
-      } else {
-        val = UseRegisterOrConstantAtStart(instr->value());
-        key = UseRegisterOrConstantAtStart(instr->key());
-      }
-      return new(zone()) LStoreKeyed(obj, key, val);
-    }
-  }
-
-  ElementsKind elements_kind = instr->elements_kind();
-  DCHECK(
-      (instr->value()->representation().IsInteger32() &&
-       !IsDoubleOrFloatElementsKind(elements_kind)) ||
-      (instr->value()->representation().IsDouble() &&
-       IsDoubleOrFloatElementsKind(elements_kind)));
-  DCHECK(instr->elements()->representation().IsExternal());
-
-  LOperand* backing_store = UseRegister(instr->elements());
-  LOperand* val = GetStoreKeyedValueOperand(instr);
-  bool clobbers_key = ExternalArrayOpRequiresTemp(
-      instr->key()->representation(), elements_kind);
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyed(backing_store, key, val);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object =
-      UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
-  LOperand* key = UseFixed(instr->key(), StoreDescriptor::NameRegister());
-  LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
-
-  DCHECK(instr->object()->representation().IsTagged());
-  DCHECK(instr->key()->representation().IsTagged());
-  DCHECK(instr->value()->representation().IsTagged());
-
-  LOperand* slot = NULL;
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
-    vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
-  }
-
-  LStoreKeyedGeneric* result = new (zone())
-      LStoreKeyedGeneric(context, object, key, value, slot, vector);
-  return MarkAsCall(result, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoTransitionElementsKind(
-    HTransitionElementsKind* instr) {
-  if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
-    LOperand* object = UseRegister(instr->object());
-    LOperand* new_map_reg = TempRegister();
-    LOperand* temp_reg = TempRegister();
-    LTransitionElementsKind* result =
-        new(zone()) LTransitionElementsKind(object, NULL,
-                                            new_map_reg, temp_reg);
-    return result;
-  } else {
-    LOperand* object = UseFixed(instr->object(), eax);
-    LOperand* context = UseFixed(instr->context(), esi);
-    LTransitionElementsKind* result =
-        new(zone()) LTransitionElementsKind(object, context, NULL, NULL);
-    return MarkAsCall(result, instr);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoTrapAllocationMemento(
-    HTrapAllocationMemento* instr) {
-  LOperand* object = UseRegister(instr->object());
-  LOperand* temp = TempRegister();
-  LTrapAllocationMemento* result =
-      new(zone()) LTrapAllocationMemento(object, temp);
-  return AssignEnvironment(result);
-}
-
-
-LInstruction* LChunkBuilder::DoMaybeGrowElements(HMaybeGrowElements* instr) {
-  info()->MarkAsDeferredCalling();
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object = Use(instr->object());
-  LOperand* elements = Use(instr->elements());
-  LOperand* key = UseRegisterOrConstant(instr->key());
-  LOperand* current_capacity = UseRegisterOrConstant(instr->current_capacity());
-
-  LMaybeGrowElements* result = new (zone())
-      LMaybeGrowElements(context, object, elements, key, current_capacity);
-  DefineFixed(result, eax);
-  return AssignPointerMap(AssignEnvironment(result));
-}
-
-
-LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
-  bool is_in_object = instr->access().IsInobject();
-  bool is_external_location = instr->access().IsExternalMemory() &&
-      instr->access().offset() == 0;
-  bool needs_write_barrier = instr->NeedsWriteBarrier();
-  bool needs_write_barrier_for_map = instr->has_transition() &&
-      instr->NeedsWriteBarrierForMap();
-
-  LOperand* obj;
-  if (needs_write_barrier) {
-    obj = is_in_object
-        ? UseRegister(instr->object())
-        : UseTempRegister(instr->object());
-  } else if (is_external_location) {
-    DCHECK(!is_in_object);
-    DCHECK(!needs_write_barrier);
-    DCHECK(!needs_write_barrier_for_map);
-    obj = UseRegisterOrConstant(instr->object());
-  } else {
-    obj = needs_write_barrier_for_map
-        ? UseRegister(instr->object())
-        : UseRegisterAtStart(instr->object());
-  }
-
-  bool can_be_constant = instr->value()->IsConstant() &&
-      HConstant::cast(instr->value())->NotInNewSpace() &&
-      !instr->field_representation().IsDouble();
-
-  LOperand* val;
-  if (instr->field_representation().IsInteger8() ||
-      instr->field_representation().IsUInteger8()) {
-    // mov_b requires a byte register (i.e. any of eax, ebx, ecx, edx).
-    // Just force the value to be in eax and we're safe here.
-    val = UseFixed(instr->value(), eax);
-  } else if (needs_write_barrier) {
-    val = UseTempRegister(instr->value());
-  } else if (can_be_constant) {
-    val = UseRegisterOrConstant(instr->value());
-  } else if (instr->field_representation().IsDouble()) {
-    val = UseRegisterAtStart(instr->value());
-  } else {
-    val = UseRegister(instr->value());
-  }
-
-  // We only need a scratch register if we have a write barrier or we
-  // have a store into the properties array (not in-object-property).
-  LOperand* temp = (!is_in_object || needs_write_barrier ||
-                    needs_write_barrier_for_map) ? TempRegister() : NULL;
-
-  // We need a temporary register for write barrier of the map field.
-  LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL;
-
-  return new(zone()) LStoreNamedField(obj, val, temp, temp_map);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object =
-      UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
-  LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
-  LOperand* slot = NULL;
-  LOperand* vector = NULL;
-  if (instr->HasVectorAndSlot()) {
-    slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
-    vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
-  }
-
-  LStoreNamedGeneric* result =
-      new (zone()) LStoreNamedGeneric(context, object, value, slot, vector);
-  return MarkAsCall(result, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreGlobalViaContext(
-    HStoreGlobalViaContext* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* value = UseFixed(instr->value(),
-                             StoreGlobalViaContextDescriptor::ValueRegister());
-  DCHECK(instr->slot_index() > 0);
-
-  LStoreGlobalViaContext* result =
-      new (zone()) LStoreGlobalViaContext(context, value);
-  return MarkAsCall(result, instr);
-}
-
-
-LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* left = UseFixed(instr->left(), edx);
-  LOperand* right = UseFixed(instr->right(), eax);
-  LStringAdd* string_add = new(zone()) LStringAdd(context, left, right);
-  return MarkAsCall(DefineFixed(string_add, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
-  LOperand* string = UseTempRegister(instr->string());
-  LOperand* index = UseTempRegister(instr->index());
-  LOperand* context = UseAny(instr->context());
-  LStringCharCodeAt* result =
-      new(zone()) LStringCharCodeAt(context, string, index);
-  return AssignPointerMap(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
-  LOperand* char_code = UseRegister(instr->value());
-  LOperand* context = UseAny(instr->context());
-  LStringCharFromCode* result =
-      new(zone()) LStringCharFromCode(context, char_code);
-  return AssignPointerMap(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
-  info()->MarkAsDeferredCalling();
-  LOperand* context = UseAny(instr->context());
-  LOperand* size = instr->size()->IsConstant()
-      ? UseConstant(instr->size())
-      : UseTempRegister(instr->size());
-  LOperand* temp = TempRegister();
-  LAllocate* result = new(zone()) LAllocate(context, size, temp);
-  return AssignPointerMap(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  return MarkAsCall(
-      DefineFixed(new(zone()) LRegExpLiteral(context), eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
-  DCHECK(argument_count_ == 0);
-  allocator_->MarkAsOsrEntry();
-  current_block_->last_environment()->set_ast_id(instr->ast_id());
-  return AssignEnvironment(new(zone()) LOsrEntry);
-}
-
-
-LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
-  LParameter* result = new(zone()) LParameter;
-  if (instr->kind() == HParameter::STACK_PARAMETER) {
-    int spill_index = chunk()->GetParameterStackSlot(instr->index());
-    return DefineAsSpilled(result, spill_index);
-  } else {
-    DCHECK(info()->IsStub());
-    CallInterfaceDescriptor descriptor =
-        info()->code_stub()->GetCallInterfaceDescriptor();
-    int index = static_cast<int>(instr->index());
-    Register reg = descriptor.GetRegisterParameter(index);
-    return DefineFixed(result, reg);
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
-  // Use an index that corresponds to the location in the unoptimized frame,
-  // which the optimized frame will subsume.
-  int env_index = instr->index();
-  int spill_index = 0;
-  if (instr->environment()->is_parameter_index(env_index)) {
-    spill_index = chunk()->GetParameterStackSlot(env_index);
-  } else {
-    spill_index = env_index - instr->environment()->first_local_index();
-    if (spill_index > LUnallocated::kMaxFixedSlotIndex) {
-      Retry(kNotEnoughSpillSlotsForOsr);
-      spill_index = 0;
-    }
-    if (spill_index == 0) {
-      // The dynamic frame alignment state overwrites the first local.
-      // The first local is saved at the end of the unoptimized frame.
-      spill_index = graph()->osr()->UnoptimizedFrameSlots();
-    }
-  }
-  return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index);
-}
-
-
-LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LCallStub* result = new(zone()) LCallStub(context);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
-  // There are no real uses of the arguments object.
-  // arguments.length and element access are supported directly on
-  // stack arguments, and any real arguments object use causes a bailout.
-  // So this value is never used.
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoCapturedObject(HCapturedObject* instr) {
-  instr->ReplayEnvironment(current_block_->last_environment());
-
-  // There are no real uses of a captured object.
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
-  info()->MarkAsRequiresFrame();
-  LOperand* args = UseRegister(instr->arguments());
-  LOperand* length;
-  LOperand* index;
-  if (instr->length()->IsConstant() && instr->index()->IsConstant()) {
-    length = UseRegisterOrConstant(instr->length());
-    index = UseOrConstant(instr->index());
-  } else {
-    length = UseTempRegister(instr->length());
-    index = Use(instr->index());
-  }
-  return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
-}
-
-
-LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
-  LOperand* object = UseFixed(instr->value(), eax);
-  LToFastProperties* result = new(zone()) LToFastProperties(object);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* value = UseFixed(instr->value(), ebx);
-  LTypeof* result = new(zone()) LTypeof(context, value);
-  return MarkAsCall(DefineFixed(result, eax), instr);
-}
-
-
-LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
-  return new(zone()) LTypeofIsAndBranch(UseTempRegister(instr->value()));
-}
-
-
-LInstruction* LChunkBuilder::DoIsConstructCallAndBranch(
-    HIsConstructCallAndBranch* instr) {
-  return new(zone()) LIsConstructCallAndBranch(TempRegister());
-}
-
-
-LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
-  instr->ReplayEnvironment(current_block_->last_environment());
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
-  info()->MarkAsDeferredCalling();
-  if (instr->is_function_entry()) {
-    LOperand* context = UseFixed(instr->context(), esi);
-    return MarkAsCall(new(zone()) LStackCheck(context), instr);
-  } else {
-    DCHECK(instr->is_backwards_branch());
-    LOperand* context = UseAny(instr->context());
-    return AssignEnvironment(
-        AssignPointerMap(new(zone()) LStackCheck(context)));
-  }
-}
-
-
-LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
-  HEnvironment* outer = current_block_->last_environment();
-  outer->set_ast_id(instr->ReturnId());
-  HConstant* undefined = graph()->GetConstantUndefined();
-  HEnvironment* inner = outer->CopyForInlining(instr->closure(),
-                                               instr->arguments_count(),
-                                               instr->function(),
-                                               undefined,
-                                               instr->inlining_kind());
-  // Only replay binding of arguments object if it wasn't removed from graph.
-  if (instr->arguments_var() != NULL && instr->arguments_object()->IsLinked()) {
-    inner->Bind(instr->arguments_var(), instr->arguments_object());
-  }
-  inner->BindContext(instr->closure_context());
-  inner->set_entry(instr);
-  current_block_->UpdateEnvironment(inner);
-  chunk_->AddInlinedFunction(instr->shared());
-  return NULL;
-}
-
-
-LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
-  LInstruction* pop = NULL;
-
-  HEnvironment* env = current_block_->last_environment();
-
-  if (env->entry()->arguments_pushed()) {
-    int argument_count = env->arguments_environment()->parameter_count();
-    pop = new(zone()) LDrop(argument_count);
-    DCHECK(instr->argument_delta() == -argument_count);
-  }
-
-  HEnvironment* outer = current_block_->last_environment()->
-      DiscardInlined(false);
-  current_block_->UpdateEnvironment(outer);
-  return pop;
-}
-
-
-LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* object = UseFixed(instr->enumerable(), eax);
-  LForInPrepareMap* result = new(zone()) LForInPrepareMap(context, object);
-  return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
-}
-
-
-LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
-  LOperand* map = UseRegister(instr->map());
-  return AssignEnvironment(DefineAsRegister(
-      new(zone()) LForInCacheArray(map)));
-}
-
-
-LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) {
-  LOperand* value = UseRegisterAtStart(instr->value());
-  LOperand* map = UseRegisterAtStart(instr->map());
-  return AssignEnvironment(new(zone()) LCheckMapValue(value, map));
-}
-
-
-LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
-  LOperand* object = UseRegister(instr->object());
-  LOperand* index = UseTempRegister(instr->index());
-  LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
-  LInstruction* result = DefineSameAsFirst(load);
-  return AssignPointerMap(result);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreFrameContext(HStoreFrameContext* instr) {
-  LOperand* context = UseRegisterAtStart(instr->context());
-  return new(zone()) LStoreFrameContext(context);
-}
-
-
-LInstruction* LChunkBuilder::DoAllocateBlockContext(
-    HAllocateBlockContext* instr) {
-  LOperand* context = UseFixed(instr->context(), esi);
-  LOperand* function = UseRegisterAtStart(instr->function());
-  LAllocateBlockContext* result =
-      new(zone()) LAllocateBlockContext(context, function);
-  return MarkAsCall(DefineFixed(result, esi), instr);
-}
-
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TARGET_ARCH_IA32