[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/arm/lithium-arm.h

+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_ARM_LITHIUM_ARM_H_
+#define V8_ARM_LITHIUM_ARM_H_
+
+#include "hydrogen.h"
+#include "lithium-allocator.h"
+#include "safepoint-table.h"
+
+namespace v8 {
+namespace internal {
+
+// Forward declarations.
+class LCodeGen;
+class LEnvironment;
+class Translation;
+
+
+// Type hierarchy:
+//
+// LInstruction
+//   LAccessArgumentsAt
+//   LArgumentsElements
+//   LArgumentsLength
+//   LBinaryOperation
+//     LAddI
+//     LApplyArguments
+//     LArithmeticD
+//     LArithmeticT
+//     LBitI
+//     LBoundsCheck
+//     LCmpID
+//     LCmpIDAndBranch
+//     LCmpJSObjectEq
+//     LCmpJSObjectEqAndBranch
+//     LCmpT
+//     LDivI
+//     LInstanceOf
+//     LInstanceOfAndBranch
+//     LLoadKeyedFastElement
+//     LLoadKeyedGeneric
+//     LModI
+//     LMulI
+//     LShiftI
+//     LSubI
+//   LCallConstantFunction
+//   LCallFunction
+//   LCallGlobal
+//   LCallKeyed
+//   LCallKnownGlobal
+//   LCallNamed
+//   LCallRuntime
+//   LCallStub
+//   LConstant
+//     LConstantD
+//     LConstantI
+//     LConstantT
+//   LDeoptimize
+//   LFunctionLiteral
+//   LGlobalObject
+//   LGlobalReceiver
+//   LLabel
+//   LLayzBailout
+//   LLoadGlobal
+//   LMaterializedLiteral
+//     LArrayLiteral
+//     LObjectLiteral
+//     LRegExpLiteral
+//   LOsrEntry
+//   LParameter
+//   LStackCheck
+//   LStoreKeyed
+//     LStoreKeyedFastElement
+//     LStoreKeyedGeneric
+//   LStoreNamed
+//     LStoreNamedField
+//     LStoreNamedGeneric
+//   LUnaryOperation
+//     LArrayLength
+//     LBitNotI
+//     LBranch
+//     LCallNew
+//     LCheckFunction
+//     LCheckInstanceType
+//     LCheckMap
+//     LCheckPrototypeMaps
+//     LCheckSmi
+//     LClassOfTest
+//     LClassOfTestAndBranch
+//     LDeleteProperty
+//     LDoubleToI
+//     LHasCachedArrayIndex
+//     LHasCachedArrayIndexAndBranch
+//     LHasInstanceType
+//     LHasInstanceTypeAndBranch
+//     LInteger32ToDouble
+//     LIsNull
+//     LIsNullAndBranch
+//     LIsSmi
+//     LIsSmiAndBranch
+//     LLoadNamedField
+//     LLoadNamedGeneric
+//     LNumberTagD
+//     LNumberTagI
+//     LPushArgument
+//     LReturn
+//     LSmiTag
+//     LStoreGlobal
+//     LTaggedToI
+//     LThrow
+//     LTypeof
+//     LTypeofIs
+//     LTypeofIsAndBranch
+//     LUnaryMathOperation
+//     LValueOf
+//   LUnknownOSRValue
+
+#define LITHIUM_ALL_INSTRUCTION_LIST(V)         \
+  V(BinaryOperation)                            \
+  V(Constant)                                   \
+  V(Call)                                       \
+  V(MaterializedLiteral)                        \
+  V(StoreKeyed)                                 \
+  V(StoreNamed)                                 \
+  V(UnaryOperation)                             \
+  LITHIUM_CONCRETE_INSTRUCTION_LIST(V)
+
+
+#define LITHIUM_CONCRETE_INSTRUCTION_LIST(V)    \
+  V(AccessArgumentsAt)                          \
+  V(AddI)                                       \
+  V(ApplyArguments)                             \
+  V(ArgumentsElements)                          \
+  V(ArgumentsLength)                            \
+  V(ArithmeticD)                                \
+  V(ArithmeticT)                                \
+  V(ArrayLength)                                \
+  V(ArrayLiteral)                               \
+  V(BitI)                                       \
+  V(BitNotI)                                    \
+  V(BoundsCheck)                                \
+  V(Branch)                                     \
+  V(CallConstantFunction)                       \
+  V(CallFunction)                               \
+  V(CallGlobal)                                 \
+  V(CallKeyed)                                  \
+  V(CallKnownGlobal)                            \
+  V(CallNamed)                                  \
+  V(CallNew)                                    \
+  V(CallRuntime)                                \
+  V(CallStub)                                   \
+  V(CheckFunction)                              \
+  V(CheckInstanceType)                          \
+  V(CheckMap)                                   \
+  V(CheckPrototypeMaps)                         \
+  V(CheckSmi)                                   \
+  V(CmpID)                                      \
+  V(CmpIDAndBranch)                             \
+  V(CmpJSObjectEq)                              \
+  V(CmpJSObjectEqAndBranch)                     \
+  V(CmpMapAndBranch)                            \
+  V(CmpT)                                       \
+  V(CmpTAndBranch)                              \
+  V(ConstantD)                                  \
+  V(ConstantI)                                  \
+  V(ConstantT)                                  \
+  V(DeleteProperty)                             \
+  V(Deoptimize)                                 \
+  V(DivI)                                       \
+  V(DoubleToI)                                  \
+  V(FunctionLiteral)                            \
+  V(Gap)                                        \
+  V(GlobalObject)                               \
+  V(GlobalReceiver)                             \
+  V(Goto)                                       \
+  V(InstanceOf)                                 \
+  V(InstanceOfAndBranch)                        \
+  V(Integer32ToDouble)                          \
+  V(IsNull)                                     \
+  V(IsNullAndBranch)                            \
+  V(IsSmi)                                      \
+  V(IsSmiAndBranch)                             \
+  V(HasInstanceType)                            \
+  V(HasInstanceTypeAndBranch)                   \
+  V(HasCachedArrayIndex)                        \
+  V(HasCachedArrayIndexAndBranch)               \
+  V(ClassOfTest)                                \
+  V(ClassOfTestAndBranch)                       \
+  V(Label)                                      \
+  V(LazyBailout)                                \
+  V(LoadElements)                               \
+  V(LoadGlobal)                                 \
+  V(LoadKeyedFastElement)                       \
+  V(LoadKeyedGeneric)                           \
+  V(LoadNamedField)                             \
+  V(LoadNamedGeneric)                           \
+  V(ModI)                                       \
+  V(MulI)                                       \
+  V(NumberTagD)                                 \
+  V(NumberTagI)                                 \
+  V(NumberUntagD)                               \
+  V(ObjectLiteral)                              \
+  V(OsrEntry)                                   \
+  V(Parameter)                                  \
+  V(PushArgument)                               \
+  V(RegExpLiteral)                              \
+  V(Return)                                     \
+  V(ShiftI)                                     \
+  V(SmiTag)                                     \
+  V(SmiUntag)                                   \
+  V(StackCheck)                                 \
+  V(StoreGlobal)                                \
+  V(StoreKeyedFastElement)                      \
+  V(StoreKeyedGeneric)                          \
+  V(StoreNamedField)                            \
+  V(StoreNamedGeneric)                          \
+  V(SubI)                                       \
+  V(TaggedToI)                                  \
+  V(Throw)                                      \
+  V(Typeof)                                     \
+  V(TypeofIs)                                   \
+  V(TypeofIsAndBranch)                          \
+  V(UnaryMathOperation)                         \
+  V(UnknownOSRValue)                            \
+  V(ValueOf)
+
+
+#define DECLARE_INSTRUCTION(type)                \
+  virtual bool Is##type() const { return true; } \
+  static L##type* cast(LInstruction* instr) {    \
+    ASSERT(instr->Is##type());                   \
+    return reinterpret_cast<L##type*>(instr);    \
+  }
+
+
+#define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)        \
+  virtual void CompileToNative(LCodeGen* generator);        \
+  virtual const char* Mnemonic() const { return mnemonic; } \
+  DECLARE_INSTRUCTION(type)
+
+
+#define DECLARE_HYDROGEN_ACCESSOR(type)     \
+  H##type* hydrogen() const {               \
+    return H##type::cast(hydrogen_value()); \
+  }
+
+
+class LInstruction: public ZoneObject {
+ public:
+  LInstruction()
+      : hydrogen_value_(NULL) { }
+  virtual ~LInstruction() { }
+
+  virtual void CompileToNative(LCodeGen* generator) = 0;
+  virtual const char* Mnemonic() const = 0;
+  virtual void PrintTo(StringStream* stream) const;
+  virtual void PrintDataTo(StringStream* stream) const { }
+
+  // Declare virtual type testers.
+#define DECLARE_DO(type) virtual bool Is##type() const { return false; }
+  LITHIUM_ALL_INSTRUCTION_LIST(DECLARE_DO)
+#undef DECLARE_DO
+  virtual bool IsControl() const { return false; }
+
+  void set_environment(LEnvironment* env) { environment_.set(env); }
+  LEnvironment* environment() const { return environment_.get(); }
+  bool HasEnvironment() const { return environment_.is_set(); }
+
+  void set_pointer_map(LPointerMap* p) { pointer_map_.set(p); }
+  LPointerMap* pointer_map() const { return pointer_map_.get(); }
+  bool HasPointerMap() const { return pointer_map_.is_set(); }
+
+  void set_result(LOperand* operand) { result_.set(operand); }
+  LOperand* result() const { return result_.get(); }
+  bool HasResult() const { return result_.is_set(); }
+
+  void set_hydrogen_value(HValue* value) { hydrogen_value_ = value; }
+  HValue* hydrogen_value() const { return hydrogen_value_; }
+
+  void set_deoptimization_environment(LEnvironment* env) {
+    deoptimization_environment_.set(env);
+  }
+  LEnvironment* deoptimization_environment() const {
+    return deoptimization_environment_.get();
+  }
+  bool HasDeoptimizationEnvironment() const {
+    return deoptimization_environment_.is_set();
+  }
+
+ private:
+  SetOncePointer<LEnvironment> environment_;
+  SetOncePointer<LPointerMap> pointer_map_;
+  SetOncePointer<LOperand> result_;
+  HValue* hydrogen_value_;
+  SetOncePointer<LEnvironment> deoptimization_environment_;
+};
+
+
+class LGapNode;
+
+
+class LGapResolver BASE_EMBEDDED {
+ public:
+  LGapResolver(const ZoneList<LMoveOperands>* moves, LOperand* marker_operand);
+  const ZoneList<LMoveOperands>* ResolveInReverseOrder();
+
+ private:
+  LGapNode* LookupNode(LOperand* operand);
+  bool CanReach(LGapNode* a, LGapNode* b, int visited_id);
+  bool CanReach(LGapNode* a, LGapNode* b);
+  void RegisterMove(LMoveOperands move);
+  void AddResultMove(LOperand* from, LOperand* to);
+  void AddResultMove(LGapNode* from, LGapNode* to);
+  void ResolveCycle(LGapNode* start);
+
+  ZoneList<LGapNode*> nodes_;
+  ZoneList<LGapNode*> identified_cycles_;
+  ZoneList<LMoveOperands> result_;
+  LOperand* marker_operand_;
+  int next_visited_id_;
+  int bailout_after_ast_id_;
+};
+
+
+class LParallelMove : public ZoneObject {
+ public:
+  LParallelMove() : move_operands_(4) { }
+
+  void AddMove(LOperand* from, LOperand* to) {
+    move_operands_.Add(LMoveOperands(from, to));
+  }
+
+  bool IsRedundant() const;
+
+  const ZoneList<LMoveOperands>* move_operands() const {
+    return &move_operands_;
+  }
+
+  void PrintDataTo(StringStream* stream) const;
+
+ private:
+  ZoneList<LMoveOperands> move_operands_;
+};
+
+
+class LGap: public LInstruction {
+ public:
+  explicit LGap(HBasicBlock* block)
+      : block_(block) {
+    parallel_moves_[BEFORE] = NULL;
+    parallel_moves_[START] = NULL;
+    parallel_moves_[END] = NULL;
+    parallel_moves_[AFTER] = NULL;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(Gap, "gap")
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  bool IsRedundant() const;
+
+  HBasicBlock* block() const { return block_; }
+
+  enum InnerPosition {
+    BEFORE,
+    START,
+    END,
+    AFTER,
+    FIRST_INNER_POSITION = BEFORE,
+    LAST_INNER_POSITION = AFTER
+  };
+
+  LParallelMove* GetOrCreateParallelMove(InnerPosition pos)  {
+    if (parallel_moves_[pos] == NULL) parallel_moves_[pos] = new LParallelMove;
+    return parallel_moves_[pos];
+  }
+
+  LParallelMove* GetParallelMove(InnerPosition pos)  {
+    return parallel_moves_[pos];
+  }
+
+ private:
+  LParallelMove* parallel_moves_[LAST_INNER_POSITION + 1];
+  HBasicBlock* block_;
+};
+
+
+class LGoto: public LInstruction {
+ public:
+  LGoto(int block_id, bool include_stack_check = false)
+    : block_id_(block_id), include_stack_check_(include_stack_check) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Goto, "goto")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int block_id() const { return block_id_; }
+  bool include_stack_check() const { return include_stack_check_; }
+
+ private:
+  int block_id_;
+  bool include_stack_check_;
+};
+
+
+class LLazyBailout: public LInstruction {
+ public:
+  LLazyBailout() : gap_instructions_size_(0) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LazyBailout, "lazy-bailout")
+
+  void set_gap_instructions_size(int gap_instructions_size) {
+    gap_instructions_size_ = gap_instructions_size;
+  }
+  int gap_instructions_size() { return gap_instructions_size_; }
+
+ private:
+  int gap_instructions_size_;
+};
+
+
+class LDeoptimize: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
+};
+
+
+class LLabel: public LGap {
+ public:
+  explicit LLabel(HBasicBlock* block)
+      : LGap(block), replacement_(NULL) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Label, "label")
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  int block_id() const { return block()->block_id(); }
+  bool is_loop_header() const { return block()->IsLoopHeader(); }
+  Label* label() { return &label_; }
+  LLabel* replacement() const { return replacement_; }
+  void set_replacement(LLabel* label) { replacement_ = label; }
+  bool HasReplacement() const { return replacement_ != NULL; }
+
+ private:
+  Label label_;
+  LLabel* replacement_;
+};
+
+
+class LParameter: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(Parameter, "parameter")
+};
+
+
+class LCallStub: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallStub, "call-stub")
+  DECLARE_HYDROGEN_ACCESSOR(CallStub)
+};
+
+
+class LUnknownOSRValue: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(UnknownOSRValue, "unknown-osr-value")
+};
+
+
+class LUnaryOperation: public LInstruction {
+ public:
+  explicit LUnaryOperation(LOperand* input) : input_(input) { }
+
+  DECLARE_INSTRUCTION(UnaryOperation)
+
+  LOperand* input() const { return input_; }
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+ private:
+  LOperand* input_;
+};
+
+
+class LBinaryOperation: public LInstruction {
+ public:
+  LBinaryOperation(LOperand* left, LOperand* right)
+      : left_(left), right_(right) { }
+
+  DECLARE_INSTRUCTION(BinaryOperation)
+
+  LOperand* left() const { return left_; }
+  LOperand* right() const { return right_; }
+  virtual void PrintDataTo(StringStream* stream) const;
+
+ private:
+  LOperand* left_;
+  LOperand* right_;
+};
+
+
+class LApplyArguments: public LBinaryOperation {
+ public:
+  LApplyArguments(LOperand* function,
+                  LOperand* receiver,
+                  LOperand* length,
+                  LOperand* elements)
+      : LBinaryOperation(function, receiver),
+        length_(length),
+        elements_(elements) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(ApplyArguments, "apply-arguments")
+
+  LOperand* function() const { return left(); }
+  LOperand* receiver() const { return right(); }
+  LOperand* length() const { return length_; }
+  LOperand* elements() const { return elements_; }
+
+ private:
+  LOperand* length_;
+  LOperand* elements_;
+};
+
+
+class LAccessArgumentsAt: public LInstruction {
+ public:
+  LAccessArgumentsAt(LOperand* arguments, LOperand* length, LOperand* index)
+      : arguments_(arguments), length_(length), index_(index) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt, "access-arguments-at")
+
+  LOperand* arguments() const { return arguments_; }
+  LOperand* length() const { return length_; }
+  LOperand* index() const { return index_; }
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+ private:
+  LOperand* arguments_;
+  LOperand* length_;
+  LOperand* index_;
+};
+
+
+class LArgumentsLength: public LUnaryOperation {
+ public:
+  explicit LArgumentsLength(LOperand* elements) : LUnaryOperation(elements) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength, "arguments-length")
+};
+
+
+class LArgumentsElements: public LInstruction {
+ public:
+  LArgumentsElements() { }
+
+  DECLARE_CONCRETE_INSTRUCTION(ArgumentsElements, "arguments-elements")
+};
+
+
+class LModI: public LBinaryOperation {
+ public:
+  LModI(LOperand* left, LOperand* right) : LBinaryOperation(left, right) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
+  DECLARE_HYDROGEN_ACCESSOR(Mod)
+};
+
+
+class LDivI: public LBinaryOperation {
+ public:
+  LDivI(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
+  DECLARE_HYDROGEN_ACCESSOR(Div)
+};
+
+
+class LMulI: public LBinaryOperation {
+ public:
+  LMulI(LOperand* left, LOperand* right, LOperand* temp)
+      : LBinaryOperation(left, right), temp_(temp) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
+  DECLARE_HYDROGEN_ACCESSOR(Mul)
+
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
+};
+
+
+class LCmpID: public LBinaryOperation {
+ public:
+  LCmpID(Token::Value op, LOperand* left, LOperand* right, bool is_double)
+      : LBinaryOperation(left, right), op_(op), is_double_(is_double) { }
+
+  Token::Value op() const { return op_; }
+  bool is_double() const { return is_double_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpID, "cmp-id")
+
+ private:
+  Token::Value op_;
+  bool is_double_;
+};
+
+
+class LCmpIDAndBranch: public LCmpID {
+ public:
+  LCmpIDAndBranch(Token::Value op,
+                  LOperand* left,
+                  LOperand* right,
+                  int true_block_id,
+                  int false_block_id,
+                  bool is_double)
+      : LCmpID(op, left, right, is_double),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LUnaryMathOperation: public LUnaryOperation {
+ public:
+  explicit LUnaryMathOperation(LOperand* value)
+      : LUnaryOperation(value) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
+  DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+  MathFunctionId op() const { return hydrogen()->op(); }
+};
+
+
+class LCmpJSObjectEq: public LBinaryOperation {
+ public:
+  LCmpJSObjectEq(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpJSObjectEq, "cmp-jsobject-eq")
+};
+
+
+class LCmpJSObjectEqAndBranch: public LCmpJSObjectEq {
+ public:
+  LCmpJSObjectEqAndBranch(LOperand* left,
+                          LOperand* right,
+                          int true_block_id,
+                          int false_block_id)
+      : LCmpJSObjectEq(left, right),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpJSObjectEqAndBranch,
+                               "cmp-jsobject-eq-and-branch")
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LIsNull: public LUnaryOperation {
+ public:
+  LIsNull(LOperand* value, bool is_strict)
+      : LUnaryOperation(value), is_strict_(is_strict) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(IsNull, "is-null")
+
+  bool is_strict() const { return is_strict_; }
+
+ private:
+  bool is_strict_;
+};
+
+
+class LIsNullAndBranch: public LIsNull {
+ public:
+  LIsNullAndBranch(LOperand* value,
+                   bool is_strict,
+                   LOperand* temp,
+                   int true_block_id,
+                   int false_block_id)
+      : LIsNull(value, is_strict),
+        temp_(temp),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(IsNullAndBranch, "is-null-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LIsSmi: public LUnaryOperation {
+ public:
+  explicit LIsSmi(LOperand* value) : LUnaryOperation(value) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(IsSmi, "is-smi")
+  DECLARE_HYDROGEN_ACCESSOR(IsSmi)
+};
+
+
+class LIsSmiAndBranch: public LIsSmi {
+ public:
+  LIsSmiAndBranch(LOperand* value,
+                  int true_block_id,
+                  int false_block_id)
+      : LIsSmi(value),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch, "is-smi-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LHasInstanceType: public LUnaryOperation {
+ public:
+  explicit LHasInstanceType(LOperand* value)
+      : LUnaryOperation(value) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(HasInstanceType, "has-instance-type")
+  DECLARE_HYDROGEN_ACCESSOR(HasInstanceType)
+
+  InstanceType TestType();  // The type to test against when generating code.
+  Condition BranchCondition();  // The branch condition for 'true'.
+};
+
+
+class LHasInstanceTypeAndBranch: public LHasInstanceType {
+ public:
+  LHasInstanceTypeAndBranch(LOperand* value,
+                            LOperand* temporary,
+                            int true_block_id,
+                            int false_block_id)
+      : LHasInstanceType(value),
+        temp_(temporary),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch,
+                               "has-instance-type-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+  LOperand* temp() { return temp_; }
+
+ private:
+  LOperand* temp_;
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LHasCachedArrayIndex: public LUnaryOperation {
+ public:
+  explicit LHasCachedArrayIndex(LOperand* value) : LUnaryOperation(value) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndex, "has-cached-array-index")
+  DECLARE_HYDROGEN_ACCESSOR(HasCachedArrayIndex)
+};
+
+
+class LHasCachedArrayIndexAndBranch: public LHasCachedArrayIndex {
+ public:
+  LHasCachedArrayIndexAndBranch(LOperand* value,
+                                int true_block_id,
+                                int false_block_id)
+      : LHasCachedArrayIndex(value),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch,
+                               "has-cached-array-index-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LClassOfTest: public LUnaryOperation {
+ public:
+  LClassOfTest(LOperand* value, LOperand* temp)
+      : LUnaryOperation(value), temporary_(temp) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(ClassOfTest, "class-of-test")
+  DECLARE_HYDROGEN_ACCESSOR(ClassOfTest)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  LOperand* temporary() { return temporary_; }
+
+ private:
+  LOperand *temporary_;
+};
+
+
+class LClassOfTestAndBranch: public LClassOfTest {
+ public:
+  LClassOfTestAndBranch(LOperand* value,
+                        LOperand* temporary,
+                        LOperand* temporary2,
+                        int true_block_id,
+                        int false_block_id)
+      : LClassOfTest(value, temporary),
+        temporary2_(temporary2),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch,
+                               "class-of-test-and-branch")
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+  LOperand* temporary2() { return temporary2_; }
+
+ private:
+  LOperand* temporary2_;
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LCmpT: public LBinaryOperation {
+ public:
+  LCmpT(LOperand* left, LOperand* right) : LBinaryOperation(left, right) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
+  DECLARE_HYDROGEN_ACCESSOR(Compare)
+
+  Token::Value op() const { return hydrogen()->token(); }
+};
+
+
+class LCmpTAndBranch: public LCmpT {
+ public:
+  LCmpTAndBranch(LOperand* left,
+                 LOperand* right,
+                 int true_block_id,
+                 int false_block_id)
+      : LCmpT(left, right),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpTAndBranch, "cmp-t-and-branch")
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LInstanceOf: public LBinaryOperation {
+ public:
+  LInstanceOf(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
+};
+
+
+class LInstanceOfAndBranch: public LInstanceOf {
+ public:
+  LInstanceOfAndBranch(LOperand* left,
+                       LOperand* right,
+                       int true_block_id,
+                       int false_block_id)
+      : LInstanceOf(left, right),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(InstanceOfAndBranch, "instance-of-and-branch")
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LBoundsCheck: public LBinaryOperation {
+ public:
+  LBoundsCheck(LOperand* index, LOperand* length)
+      : LBinaryOperation(index, length) { }
+
+  LOperand* index() const { return left(); }
+  LOperand* length() const { return right(); }
+
+  DECLARE_CONCRETE_INSTRUCTION(BoundsCheck, "bounds-check")
+};
+
+
+class LBitI: public LBinaryOperation {
+ public:
+  LBitI(Token::Value op, LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right), op_(op) { }
+
+  Token::Value op() const { return op_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(BitI, "bit-i")
+
+ private:
+  Token::Value op_;
+};
+
+
+class LShiftI: public LBinaryOperation {
+ public:
+  LShiftI(Token::Value op, LOperand* left, LOperand* right, bool can_deopt)
+      : LBinaryOperation(left, right), op_(op), can_deopt_(can_deopt) { }
+
+  Token::Value op() const { return op_; }
+
+  bool can_deopt() const { return can_deopt_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ShiftI, "shift-i")
+
+ private:
+  Token::Value op_;
+  bool can_deopt_;
+};
+
+
+class LSubI: public LBinaryOperation {
+ public:
+  LSubI(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(SubI, "sub-i")
+  DECLARE_HYDROGEN_ACCESSOR(Sub)
+};
+
+
+class LConstant: public LInstruction {
+  DECLARE_INSTRUCTION(Constant)
+};
+
+
+class LConstantI: public LConstant {
+ public:
+  explicit LConstantI(int32_t value) : value_(value) { }
+  int32_t value() const { return value_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ConstantI, "constant-i")
+
+ private:
+  int32_t value_;
+};
+
+
+class LConstantD: public LConstant {
+ public:
+  explicit LConstantD(double value) : value_(value) { }
+  double value() const { return value_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ConstantD, "constant-d")
+
+ private:
+  double value_;
+};
+
+
+class LConstantT: public LConstant {
+ public:
+  explicit LConstantT(Handle<Object> value) : value_(value) { }
+  Handle<Object> value() const { return value_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ConstantT, "constant-t")
+
+ private:
+  Handle<Object> value_;
+};
+
+
+class LBranch: public LUnaryOperation {
+ public:
+  LBranch(LOperand* input, int true_block_id, int false_block_id)
+      : LUnaryOperation(input),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Branch, "branch")
+  DECLARE_HYDROGEN_ACCESSOR(Value)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LCmpMapAndBranch: public LUnaryOperation {
+ public:
+  LCmpMapAndBranch(LOperand* value,
+                   Handle<Map> map,
+                   int true_block_id,
+                   int false_block_id)
+      : LUnaryOperation(value),
+        map_(map),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
+
+  virtual bool IsControl() const { return true; }
+
+  Handle<Map> map() const { return map_; }
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  Handle<Map> map_;
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LArrayLength: public LUnaryOperation {
+ public:
+  LArrayLength(LOperand* input, LOperand* temporary)
+      : LUnaryOperation(input), temporary_(temporary) { }
+
+  LOperand* temporary() const { return temporary_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ArrayLength, "array-length")
+  DECLARE_HYDROGEN_ACCESSOR(ArrayLength)
+
+ private:
+  LOperand* temporary_;
+};
+
+
+class LValueOf: public LUnaryOperation {
+ public:
+  LValueOf(LOperand* input, LOperand* temporary)
+      : LUnaryOperation(input), temporary_(temporary) { }
+
+  LOperand* temporary() const { return temporary_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
+  DECLARE_HYDROGEN_ACCESSOR(ValueOf)
+
+ private:
+  LOperand* temporary_;
+};
+
+
+class LThrow: public LUnaryOperation {
+ public:
+  explicit LThrow(LOperand* value) : LUnaryOperation(value) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Throw, "throw")
+};
+
+
+class LBitNotI: public LUnaryOperation {
+ public:
+  explicit LBitNotI(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(BitNotI, "bit-not-i")
+};
+
+
+class LAddI: public LBinaryOperation {
+ public:
+  LAddI(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(AddI, "add-i")
+  DECLARE_HYDROGEN_ACCESSOR(Add)
+};
+
+
+class LArithmeticD: public LBinaryOperation {
+ public:
+  LArithmeticD(Token::Value op, LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right), op_(op) { }
+
+  Token::Value op() const { return op_; }
+
+  virtual void CompileToNative(LCodeGen* generator);
+  virtual const char* Mnemonic() const;
+
+ private:
+  Token::Value op_;
+};
+
+
+class LArithmeticT: public LBinaryOperation {
+ public:
+  LArithmeticT(Token::Value op, LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right), op_(op) { }
+
+  virtual void CompileToNative(LCodeGen* generator);
+  virtual const char* Mnemonic() const;
+
+  Token::Value op() const { return op_; }
+
+ private:
+  Token::Value op_;
+};
+
+
+class LReturn: public LUnaryOperation {
+ public:
+  explicit LReturn(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Return, "return")
+};
+
+
+class LLoadNamedField: public LUnaryOperation {
+ public:
+  explicit LLoadNamedField(LOperand* object) : LUnaryOperation(object) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
+  DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
+};
+
+
+class LLoadNamedGeneric: public LUnaryOperation {
+ public:
+  explicit LLoadNamedGeneric(LOperand* object) : LUnaryOperation(object) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric, "load-named-generic")
+  DECLARE_HYDROGEN_ACCESSOR(LoadNamedGeneric)
+
+  LOperand* object() const { return input(); }
+  Handle<Object> name() const { return hydrogen()->name(); }
+};
+
+
+class LLoadElements: public LUnaryOperation {
+ public:
+  explicit LLoadElements(LOperand* obj) : LUnaryOperation(obj) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadElements, "load-elements")
+};
+
+
+class LLoadKeyedFastElement: public LBinaryOperation {
+ public:
+  LLoadKeyedFastElement(LOperand* elements,
+                        LOperand* key,
+                        LOperand* load_result)
+      : LBinaryOperation(elements, key),
+        load_result_(load_result) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
+  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
+
+  LOperand* elements() const { return left(); }
+  LOperand* key() const { return right(); }
+  LOperand* load_result() const { return load_result_; }
+
+ private:
+  LOperand* load_result_;
+};
+
+
+class LLoadKeyedGeneric: public LBinaryOperation {
+ public:
+  LLoadKeyedGeneric(LOperand* obj, LOperand* key)
+      : LBinaryOperation(obj, key) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
+
+  LOperand* object() const { return left(); }
+  LOperand* key() const { return right(); }
+};
+
+
+class LLoadGlobal: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobal, "load-global")
+  DECLARE_HYDROGEN_ACCESSOR(LoadGlobal)
+};
+
+
+class LStoreGlobal: public LUnaryOperation {
+ public:
+  explicit LStoreGlobal(LOperand* value) : LUnaryOperation(value) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreGlobal, "store-global")
+  DECLARE_HYDROGEN_ACCESSOR(StoreGlobal)
+};
+
+
+class LPushArgument: public LUnaryOperation {
+ public:
+  explicit LPushArgument(LOperand* argument) : LUnaryOperation(argument) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
+};
+
+
+class LGlobalObject: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
+};
+
+
+class LGlobalReceiver: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+};
+
+
+class LCallConstantFunction: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallConstantFunction, "call-constant-function")
+  DECLARE_HYDROGEN_ACCESSOR(CallConstantFunction)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  Handle<JSFunction> function() const { return hydrogen()->function(); }
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
+class LCallKeyed: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallKeyed, "call-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(CallKeyed)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
+class LCallNamed: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallNamed, "call-named")
+  DECLARE_HYDROGEN_ACCESSOR(CallNamed)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  Handle<String> name() const { return hydrogen()->name(); }
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
+class LCallFunction: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallFunction, "call-function")
+  DECLARE_HYDROGEN_ACCESSOR(CallFunction)
+
+  int arity() const { return hydrogen()->argument_count() - 2; }
+};
+
+
+class LCallGlobal: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallGlobal, "call-global")
+  DECLARE_HYDROGEN_ACCESSOR(CallGlobal)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  Handle<String> name() const {return hydrogen()->name(); }
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
+class LCallKnownGlobal: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallKnownGlobal, "call-known-global")
+  DECLARE_HYDROGEN_ACCESSOR(CallKnownGlobal)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  Handle<JSFunction> target() const { return hydrogen()->target();  }
+  int arity() const { return hydrogen()->argument_count() - 1;  }
+};
+
+
+class LCallNew: public LUnaryOperation {
+ public:
+  explicit LCallNew(LOperand* constructor) : LUnaryOperation(constructor) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CallNew, "call-new")
+  DECLARE_HYDROGEN_ACCESSOR(CallNew)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
+class LCallRuntime: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(CallRuntime, "call-runtime")
+  DECLARE_HYDROGEN_ACCESSOR(CallRuntime)
+
+  const Runtime::Function* function() const { return hydrogen()->function(); }
+  int arity() const { return hydrogen()->argument_count(); }
+};
+
+
+class LInteger32ToDouble: public LUnaryOperation {
+ public:
+  explicit LInteger32ToDouble(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
+};
+
+
+class LNumberTagI: public LUnaryOperation {
+ public:
+  explicit LNumberTagI(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
+};
+
+
+class LNumberTagD: public LUnaryOperation {
+ public:
+  explicit LNumberTagD(LOperand* value, LOperand* temp)
+      : LUnaryOperation(value), temp_(temp) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
+
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
+};
+
+
+// Sometimes truncating conversion from a tagged value to an int32.
+class LDoubleToI: public LUnaryOperation {
+ public:
+  explicit LDoubleToI(LOperand* value) : LUnaryOperation(value) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
+  DECLARE_HYDROGEN_ACCESSOR(Change)
+
+  bool truncating() { return hydrogen()->CanTruncateToInt32(); }
+};
+
+
+// Truncating conversion from a tagged value to an int32.
+class LTaggedToI: public LUnaryOperation {
+ public:
+  LTaggedToI(LOperand* value, LOperand* temp)
+      : LUnaryOperation(value), temp_(temp) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
+  DECLARE_HYDROGEN_ACCESSOR(Change)
+
+  bool truncating() { return hydrogen()->CanTruncateToInt32(); }
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
+};
+
+
+class LSmiTag: public LUnaryOperation {
+ public:
+  explicit LSmiTag(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
+};
+
+
+class LNumberUntagD: public LUnaryOperation {
+ public:
+  explicit LNumberUntagD(LOperand* value) : LUnaryOperation(value) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
+};
+
+
+class LSmiUntag: public LUnaryOperation {
+ public:
+  LSmiUntag(LOperand* use, bool needs_check)
+      : LUnaryOperation(use), needs_check_(needs_check) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
+
+  bool needs_check() const { return needs_check_; }
+
+ private:
+  bool needs_check_;
+};
+
+
+class LStoreNamed: public LInstruction {
+ public:
+  LStoreNamed(LOperand* obj, Handle<Object> name, LOperand* val)
+      : object_(obj), name_(name), value_(val) { }
+
+  DECLARE_INSTRUCTION(StoreNamed)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  LOperand* object() const { return object_; }
+  Handle<Object> name() const { return name_; }
+  LOperand* value() const { return value_; }
+
+ private:
+  LOperand* object_;
+  Handle<Object> name_;
+  LOperand* value_;
+};
+
+
+class LStoreNamedField: public LStoreNamed {
+ public:
+  LStoreNamedField(LOperand* obj,
+                   Handle<Object> name,
+                   LOperand* val,
+                   bool in_object,
+                   int offset,
+                   LOperand* temp,
+                   bool needs_write_barrier,
+                   Handle<Map> transition)
+      : LStoreNamed(obj, name, val),
+        is_in_object_(in_object),
+        offset_(offset),
+        temp_(temp),
+        needs_write_barrier_(needs_write_barrier),
+        transition_(transition) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
+
+  bool is_in_object() { return is_in_object_; }
+  int offset() { return offset_; }
+  LOperand* temp() { return temp_; }
+  bool needs_write_barrier() { return needs_write_barrier_; }
+  Handle<Map> transition() const { return transition_; }
+  void set_transition(Handle<Map> map) { transition_ = map; }
+
+ private:
+  bool is_in_object_;
+  int offset_;
+  LOperand* temp_;
+  bool needs_write_barrier_;
+  Handle<Map> transition_;
+};
+
+
+class LStoreNamedGeneric: public LStoreNamed {
+ public:
+  LStoreNamedGeneric(LOperand* obj,
+                     Handle<Object> name,
+                     LOperand* val)
+      : LStoreNamed(obj, name, val) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
+};
+
+
+class LStoreKeyed: public LInstruction {
+ public:
+  LStoreKeyed(LOperand* obj, LOperand* key, LOperand* val)
+      : object_(obj), key_(key), value_(val) { }
+
+  DECLARE_INSTRUCTION(StoreKeyed)
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  LOperand* object() const { return object_; }
+  LOperand* key() const { return key_; }
+  LOperand* value() const { return value_; }
+
+ private:
+  LOperand* object_;
+  LOperand* key_;
+  LOperand* value_;
+};
+
+
+class LStoreKeyedFastElement: public LStoreKeyed {
+ public:
+  LStoreKeyedFastElement(LOperand* obj, LOperand* key, LOperand* val)
+      : LStoreKeyed(obj, key, val) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement,
+                               "store-keyed-fast-element")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
+};
+
+
+class LStoreKeyedGeneric: public LStoreKeyed {
+ public:
+  LStoreKeyedGeneric(LOperand* obj, LOperand* key, LOperand* val)
+      : LStoreKeyed(obj, key, val) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
+};
+
+
+class LCheckFunction: public LUnaryOperation {
+ public:
+  explicit LCheckFunction(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckFunction, "check-function")
+  DECLARE_HYDROGEN_ACCESSOR(CheckFunction)
+};
+
+
+class LCheckInstanceType: public LUnaryOperation {
+ public:
+  LCheckInstanceType(LOperand* use, LOperand* temp)
+      : LUnaryOperation(use), temp_(temp) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
+  DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
+
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
+};
+
+
+class LCheckMap: public LUnaryOperation {
+ public:
+  explicit LCheckMap(LOperand* use) : LUnaryOperation(use) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckMap, "check-map")
+  DECLARE_HYDROGEN_ACCESSOR(CheckMap)
+};
+
+
+class LCheckPrototypeMaps: public LInstruction {
+ public:
+  LCheckPrototypeMaps(LOperand* temp,
+                      Handle<JSObject> holder,
+                      Handle<Map> receiver_map)
+      : temp_(temp),
+        holder_(holder),
+        receiver_map_(receiver_map) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
+
+  LOperand* temp() const { return temp_; }
+  Handle<JSObject> holder() const { return holder_; }
+  Handle<Map> receiver_map() const { return receiver_map_; }
+
+ private:
+  LOperand* temp_;
+  Handle<JSObject> holder_;
+  Handle<Map> receiver_map_;
+};
+
+
+class LCheckSmi: public LUnaryOperation {
+ public:
+  LCheckSmi(LOperand* use, Condition condition)
+      : LUnaryOperation(use), condition_(condition) { }
+
+  Condition condition() const { return condition_; }
+
+  virtual void CompileToNative(LCodeGen* generator);
+  virtual const char* Mnemonic() const {
+    return (condition_ == eq) ? "check-non-smi" : "check-smi";
+  }
+
+ private:
+  Condition condition_;
+};
+
+
+class LMaterializedLiteral: public LInstruction {
+ public:
+  DECLARE_INSTRUCTION(MaterializedLiteral)
+};
+
+
+class LArrayLiteral: public LMaterializedLiteral {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(ArrayLiteral, "array-literal")
+  DECLARE_HYDROGEN_ACCESSOR(ArrayLiteral)
+};
+
+
+class LObjectLiteral: public LMaterializedLiteral {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(ObjectLiteral, "object-literal")
+  DECLARE_HYDROGEN_ACCESSOR(ObjectLiteral)
+};
+
+
+class LRegExpLiteral: public LMaterializedLiteral {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(RegExpLiteral, "regexp-literal")
+  DECLARE_HYDROGEN_ACCESSOR(RegExpLiteral)
+};
+
+
+class LFunctionLiteral: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(FunctionLiteral, "function-literal")
+  DECLARE_HYDROGEN_ACCESSOR(FunctionLiteral)
+
+  Handle<SharedFunctionInfo> shared_info() { return hydrogen()->shared_info(); }
+};
+
+
+class LTypeof: public LUnaryOperation {
+ public:
+  explicit LTypeof(LOperand* input) : LUnaryOperation(input) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
+};
+
+
+class LTypeofIs: public LUnaryOperation {
+ public:
+  explicit LTypeofIs(LOperand* input) : LUnaryOperation(input) { }
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  DECLARE_CONCRETE_INSTRUCTION(TypeofIs, "typeof-is")
+  DECLARE_HYDROGEN_ACCESSOR(TypeofIs)
+
+  Handle<String> type_literal() { return hydrogen()->type_literal(); }
+};
+
+
+class LTypeofIsAndBranch: public LTypeofIs {
+ public:
+  LTypeofIsAndBranch(LOperand* value,
+                     int true_block_id,
+                     int false_block_id)
+      : LTypeofIs(value),
+        true_block_id_(true_block_id),
+        false_block_id_(false_block_id) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch, "typeof-is-and-branch")
+
+  virtual void PrintDataTo(StringStream* stream) const;
+  virtual bool IsControl() const { return true; }
+
+  int true_block_id() const { return true_block_id_; }
+  int false_block_id() const { return false_block_id_; }
+
+ private:
+  int true_block_id_;
+  int false_block_id_;
+};
+
+
+class LDeleteProperty: public LBinaryOperation {
+ public:
+  LDeleteProperty(LOperand* obj, LOperand* key) : LBinaryOperation(obj, key) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
+
+  LOperand* object() const { return left(); }
+  LOperand* key() const { return right(); }
+};
+
+
+class LOsrEntry: public LInstruction {
+ public:
+  LOsrEntry();
+
+  DECLARE_CONCRETE_INSTRUCTION(OsrEntry, "osr-entry")
+
+  LOperand** SpilledRegisterArray() { return register_spills_; }
+  LOperand** SpilledDoubleRegisterArray() { return double_register_spills_; }
+
+  void MarkSpilledRegister(int allocation_index, LOperand* spill_operand);
+  void MarkSpilledDoubleRegister(int allocation_index,
+                                 LOperand* spill_operand);
+
+ private:
+  // Arrays of spill slot operands for registers with an assigned spill
+  // slot, i.e., that must also be restored to the spill slot on OSR entry.
+  // NULL if the register has no assigned spill slot.  Indexed by allocation
+  // index.
+  LOperand* register_spills_[Register::kNumAllocatableRegisters];
+  LOperand* double_register_spills_[DoubleRegister::kNumAllocatableRegisters];
+};
+
+
+class LStackCheck: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(StackCheck, "stack-check")
+};
+
+
+class LPointerMap: public ZoneObject {
+ public:
+  explicit LPointerMap(int position)
+      : pointer_operands_(8), position_(position), lithium_position_(-1) { }
+
+  const ZoneList<LOperand*>* operands() const { return &pointer_operands_; }
+  int position() const { return position_; }
+  int lithium_position() const { return lithium_position_; }
+
+  void set_lithium_position(int pos) {
+    ASSERT(lithium_position_ == -1);
+    lithium_position_ = pos;
+  }
+
+  void RecordPointer(LOperand* op);
+  void PrintTo(StringStream* stream) const;
+
+ private:
+  ZoneList<LOperand*> pointer_operands_;
+  int position_;
+  int lithium_position_;
+};
+
+
+class LEnvironment: public ZoneObject {
+ public:
+  LEnvironment(Handle<JSFunction> closure,
+               int ast_id,
+               int parameter_count,
+               int argument_count,
+               int value_count,
+               LEnvironment* outer)
+      : closure_(closure),
+        arguments_stack_height_(argument_count),
+        deoptimization_index_(Safepoint::kNoDeoptimizationIndex),
+        translation_index_(-1),
+        ast_id_(ast_id),
+        parameter_count_(parameter_count),
+        values_(value_count),
+        representations_(value_count),
+        spilled_registers_(NULL),
+        spilled_double_registers_(NULL),
+        outer_(outer) {
+  }
+
+  Handle<JSFunction> closure() const { return closure_; }
+  int arguments_stack_height() const { return arguments_stack_height_; }
+  int deoptimization_index() const { return deoptimization_index_; }
+  int translation_index() const { return translation_index_; }
+  int ast_id() const { return ast_id_; }
+  int parameter_count() const { return parameter_count_; }
+  const ZoneList<LOperand*>* values() const { return &values_; }
+  LEnvironment* outer() const { return outer_; }
+
+  void AddValue(LOperand* operand, Representation representation) {
+    values_.Add(operand);
+    representations_.Add(representation);
+  }
+
+  bool HasTaggedValueAt(int index) const {
+    return representations_[index].IsTagged();
+  }
+
+  void Register(int deoptimization_index, int translation_index) {
+    ASSERT(!HasBeenRegistered());
+    deoptimization_index_ = deoptimization_index;
+    translation_index_ = translation_index;
+  }
+  bool HasBeenRegistered() const {
+    return deoptimization_index_ != Safepoint::kNoDeoptimizationIndex;
+  }
+
+  void SetSpilledRegisters(LOperand** registers,
+                           LOperand** double_registers) {
+    spilled_registers_ = registers;
+    spilled_double_registers_ = double_registers;
+  }
+
+  // Emit frame translation commands for this environment.
+  void WriteTranslation(LCodeGen* cgen, Translation* translation) const;
+
+  void PrintTo(StringStream* stream) const;
+
+ private:
+  Handle<JSFunction> closure_;
+  int arguments_stack_height_;
+  int deoptimization_index_;
+  int translation_index_;
+  int ast_id_;
+  int parameter_count_;
+  ZoneList<LOperand*> values_;
+  ZoneList<Representation> representations_;
+
+  // Allocation index indexed arrays of spill slot operands for registers
+  // that are also in spill slots at an OSR entry.  NULL for environments
+  // that do not correspond to an OSR entry.
+  LOperand** spilled_registers_;
+  LOperand** spilled_double_registers_;
+
+  LEnvironment* outer_;
+};
+
+class LChunkBuilder;
+class LChunk: public ZoneObject {
+ public:
+  explicit LChunk(HGraph* graph);
+
+  int AddInstruction(LInstruction* instruction, HBasicBlock* block);
+  LConstantOperand* DefineConstantOperand(HConstant* constant);
+  Handle<Object> LookupLiteral(LConstantOperand* operand) const;
+  Representation LookupLiteralRepresentation(LConstantOperand* operand) const;
+
+  int GetNextSpillIndex(bool is_double);
+  LOperand* GetNextSpillSlot(bool is_double);
+
+  int ParameterAt(int index);
+  int GetParameterStackSlot(int index) const;
+  int spill_slot_count() const { return spill_slot_count_; }
+  HGraph* graph() const { return graph_; }
+  const ZoneList<LInstruction*>* instructions() const { return &instructions_; }
+  void AddGapMove(int index, LOperand* from, LOperand* to);
+  LGap* GetGapAt(int index) const;
+  bool IsGapAt(int index) const;
+  int NearestGapPos(int index) const;
+  int NearestNextGapPos(int index) const;
+  void MarkEmptyBlocks();
+  const ZoneList<LPointerMap*>* pointer_maps() const { return &pointer_maps_; }
+  LLabel* GetLabel(int block_id) const {
+    HBasicBlock* block = graph_->blocks()->at(block_id);
+    int first_instruction = block->first_instruction_index();
+    return LLabel::cast(instructions_[first_instruction]);
+  }
+  int LookupDestination(int block_id) const {
+    LLabel* cur = GetLabel(block_id);
+    while (cur->replacement() != NULL) {
+      cur = cur->replacement();
+    }
+    return cur->block_id();
+  }
+  Label* GetAssemblyLabel(int block_id) const {
+    LLabel* label = GetLabel(block_id);
+    ASSERT(!label->HasReplacement());
+    return label->label();
+  }
+
+  const ZoneList<Handle<JSFunction> >* inlined_closures() const {
+    return &inlined_closures_;
+  }
+
+  void AddInlinedClosure(Handle<JSFunction> closure) {
+    inlined_closures_.Add(closure);
+  }
+
+  void Verify() const;
+
+ private:
+  int spill_slot_count_;
+  HGraph* const graph_;
+  ZoneList<LInstruction*> instructions_;
+  ZoneList<LPointerMap*> pointer_maps_;
+  ZoneList<Handle<JSFunction> > inlined_closures_;
+};
+
+
+class LChunkBuilder BASE_EMBEDDED {
+ public:
+  LChunkBuilder(HGraph* graph, LAllocator* allocator)
+      : chunk_(NULL),
+        graph_(graph),
+        status_(UNUSED),
+        current_instruction_(NULL),
+        current_block_(NULL),
+        next_block_(NULL),
+        argument_count_(0),
+        allocator_(allocator),
+        position_(RelocInfo::kNoPosition),
+        instructions_pending_deoptimization_environment_(NULL),
+        pending_deoptimization_ast_id_(AstNode::kNoNumber) { }
+
+  // Build the sequence for the graph.
+  LChunk* Build();
+
+  // Declare methods that deal with the individual node types.
+#define DECLARE_DO(type) LInstruction* Do##type(H##type* node);
+  HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
+#undef DECLARE_DO
+
+ private:
+  enum Status {
+    UNUSED,
+    BUILDING,
+    DONE,
+    ABORTED
+  };
+
+  LChunk* chunk() const { return chunk_; }
+  HGraph* graph() const { return graph_; }
+
+  bool is_unused() const { return status_ == UNUSED; }
+  bool is_building() const { return status_ == BUILDING; }
+  bool is_done() const { return status_ == DONE; }
+  bool is_aborted() const { return status_ == ABORTED; }
+
+  void Abort(const char* format, ...);
+
+  // Methods for getting operands for Use / Define / Temp.
+  LRegister* ToOperand(Register reg);
+  LUnallocated* ToUnallocated(Register reg);
+  LUnallocated* ToUnallocated(DoubleRegister reg);
+
+  // Methods for setting up define-use relationships.
+  LOperand* Use(HValue* value, LUnallocated* operand);
+  LOperand* UseFixed(HValue* value, Register fixed_register);
+  LOperand* UseFixedDouble(HValue* value, DoubleRegister fixed_register);
+
+  // A value that is guaranteed to be allocated to a register.
+  // Operand created by UseRegister is guaranteed to be live until the end of
+  // instruction. This means that register allocator will not reuse it's
+  // register for any other operand inside instruction.
+  // Operand created by UseRegisterAtStart is guaranteed to be live only at
+  // instruction start. Register allocator is free to assign the same register
+  // to some other operand used inside instruction (i.e. temporary or
+  // output).
+  LOperand* UseRegister(HValue* value);
+  LOperand* UseRegisterAtStart(HValue* value);
+
+  // A value in a register that may be trashed.
+  LOperand* UseTempRegister(HValue* value);
+  LOperand* Use(HValue* value);
+  LOperand* UseAtStart(HValue* value);
+  LOperand* UseOrConstant(HValue* value);
+  LOperand* UseOrConstantAtStart(HValue* value);
+  LOperand* UseRegisterOrConstant(HValue* value);
+  LOperand* UseRegisterOrConstantAtStart(HValue* value);
+
+  // Methods for setting up define-use relationships.
+  // Return the same instruction that they are passed.
+  LInstruction* Define(LInstruction* instr, LUnallocated* result);
+  LInstruction* Define(LInstruction* instr);
+  LInstruction* DefineAsRegister(LInstruction* instr);
+  LInstruction* DefineAsSpilled(LInstruction* instr, int index);
+  LInstruction* DefineSameAsAny(LInstruction* instr);
+  LInstruction* DefineSameAsFirst(LInstruction* instr);
+  LInstruction* DefineFixed(LInstruction* instr, Register reg);
+  LInstruction* DefineFixedDouble(LInstruction* instr, DoubleRegister reg);
+  LInstruction* AssignEnvironment(LInstruction* instr);
+  LInstruction* AssignPointerMap(LInstruction* instr);
+
+  enum CanDeoptimize { CAN_DEOPTIMIZE_EAGERLY, CANNOT_DEOPTIMIZE_EAGERLY };
+
+  // By default we assume that instruction sequences generated for calls
+  // cannot deoptimize eagerly and we do not attach environment to this
+  // instruction.
+  LInstruction* MarkAsCall(
+      LInstruction* instr,
+      HInstruction* hinstr,
+      CanDeoptimize can_deoptimize = CANNOT_DEOPTIMIZE_EAGERLY);
+
+  LInstruction* SetInstructionPendingDeoptimizationEnvironment(
+      LInstruction* instr, int ast_id);
+  void ClearInstructionPendingDeoptimizationEnvironment();
+
+  LEnvironment* CreateEnvironment(HEnvironment* hydrogen_env);
+
+  // Temporary operand that may be a memory location.
+  LOperand* Temp();
+  // Temporary operand that must be in a register.
+  LUnallocated* TempRegister();
+  LOperand* FixedTemp(Register reg);
+  LOperand* FixedTemp(DoubleRegister reg);
+
+  void VisitInstruction(HInstruction* current);
+
+  void DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block);
+  LInstruction* DoBit(Token::Value op, HBitwiseBinaryOperation* instr);
+  LInstruction* DoShift(Token::Value op, HBitwiseBinaryOperation* instr);
+  LInstruction* DoArithmeticD(Token::Value op,
+                              HArithmeticBinaryOperation* instr);
+  LInstruction* DoArithmeticT(Token::Value op,
+                              HArithmeticBinaryOperation* instr);
+
+  LChunk* chunk_;
+  HGraph* const graph_;
+  Status status_;
+  HInstruction* current_instruction_;
+  HBasicBlock* current_block_;
+  HBasicBlock* next_block_;
+  int argument_count_;
+  LAllocator* allocator_;
+  int position_;
+  LInstruction* instructions_pending_deoptimization_environment_;
+  int pending_deoptimization_ast_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
+};
+
+#undef DECLARE_HYDROGEN_ACCESSOR
+#undef DECLARE_INSTRUCTION
+#undef DECLARE_CONCRETE_INSTRUCTION
+
+} }  // namespace v8::internal
+
+#endif  // V8_ARM_LITHIUM_ARM_H_