Remove the HValueOf instruction.

src/x64/lithium-x64.h

 // Copyright 2012 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
@@ skipping 156 matching lines @@
   V(ThisFunction)                               \
   V(Throw)                                      \
   V(ToFastProperties)                           \
   V(TransitionElementsKind)                     \
   V(TrapAllocationMemento)                      \
   V(Typeof)                                     \
   V(TypeofIsAndBranch)                          \
   V(Uint32ToDouble)                             \
   V(Uint32ToSmi)                                \
   V(UnknownOSRValue)                            \
-  V(ValueOf)                                    \
   V(WrapReceiver)
 
 
 #define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)                        \
   virtual Opcode opcode() const V8_FINAL V8_OVERRIDE {                      \
     return LInstruction::k##type;                                           \
   }                                                                         \
   virtual void CompileToNative(LCodeGen* generator) V8_FINAL V8_OVERRIDE;   \
   virtual const char* Mnemonic() const V8_FINAL V8_OVERRIDE {               \
     return mnemonic;                                                        \
@@ skipping 1054 matching lines @@
     inputs_[0] = value;
   }
 
   LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
 };
 
 
-class LValueOf V8_FINAL : public LTemplateInstruction<1, 1, 0> {
- public:
-  explicit LValueOf(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
-  DECLARE_HYDROGEN_ACCESSOR(ValueOf)
-};
-
-
 class LDateField V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   LDateField(LOperand* date, Smi* index) : index_(index) {
     inputs_[0] = date;
   }
 
   LOperand* date() { return inputs_[0]; }
   Smi* index() const { return index_; }
 
   DECLARE_CONCRETE_INSTRUCTION(DateField, "date-field")
@@ skipping 1418 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_