[es6] Reintroduce the instanceof operator in the backends.

src/crankshaft/x64/lithium-x64.h

 // 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.
 
 #ifndef V8_CRANKSHAFT_X64_LITHIUM_X64_H_
 #define V8_CRANKSHAFT_X64_LITHIUM_X64_H_
 
 #include "src/crankshaft/hydrogen.h"
 #include "src/crankshaft/lithium.h"
 #include "src/crankshaft/lithium-allocator.h"
@@ skipping 61 matching lines @@
   V(FlooringDivByPowerOf2I)                  \
   V(FlooringDivI)                            \
   V(ForInCacheArray)                         \
   V(ForInPrepareMap)                         \
   V(GetCachedArrayIndex)                     \
   V(Goto)                                    \
   V(HasCachedArrayIndexAndBranch)            \
   V(HasInPrototypeChainAndBranch)            \
   V(HasInstanceTypeAndBranch)                \
   V(InnerAllocatedObject)                    \
-  V(InstanceOf)                              \
   V(InstructionGap)                          \
   V(Integer32ToDouble)                       \
   V(InvokeFunction)                          \
   V(IsStringAndBranch)                       \
   V(IsSmiAndBranch)                          \
   V(IsUndetectableAndBranch)                 \
   V(Label)                                   \
   V(LazyBailout)                             \
   V(LoadContextSlot)                         \
   V(LoadRoot)                                \
@@ skipping 1037 matching lines @@
   LOperand* left() { return inputs_[1]; }
   LOperand* right() { return inputs_[2]; }
 
   DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
   DECLARE_HYDROGEN_ACCESSOR(CompareGeneric)
 
   Token::Value op() const { return hydrogen()->token(); }
 };
 
 
-class LInstanceOf final : public LTemplateInstruction<1, 3, 0> {
- public:
-  LInstanceOf(LOperand* context, LOperand* left, LOperand* right) {
-    inputs_[0] = context;
-    inputs_[1] = left;
-    inputs_[2] = right;
-  }
-
-  LOperand* context() { return inputs_[0]; }
-  LOperand* left() { return inputs_[1]; }
-  LOperand* right() { return inputs_[2]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
-};
-
-
 class LHasInPrototypeChainAndBranch final : public LControlInstruction<2, 0> {
  public:
   LHasInPrototypeChainAndBranch(LOperand* object, LOperand* prototype) {
     inputs_[0] = object;
     inputs_[1] = prototype;
   }
 
   LOperand* object() const { return inputs_[0]; }
   LOperand* prototype() const { return inputs_[1]; }
 
@@ skipping 1505 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_X64_LITHIUM_X64_H_