[turbofan] Properly optimize instanceof (even in the presence of @@hasInstance).

src/compiler/js-typed-lowering.h

 // Copyright 2014 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_COMPILER_JS_TYPED_LOWERING_H_
 #define V8_COMPILER_JS_TYPED_LOWERING_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
@@ skipping 34 matching lines @@
   Reduction Reduce(Node* node) final;
 
  private:
   friend class JSBinopReduction;
 
   Reduction ReduceJSAdd(Node* node);
   Reduction ReduceJSComparison(Node* node);
   Reduction ReduceJSLoadNamed(Node* node);
   Reduction ReduceJSLoadProperty(Node* node);
   Reduction ReduceJSStoreProperty(Node* node);
-  Reduction ReduceJSInstanceOf(Node* node);
+  Reduction ReduceJSOrdinaryHasInstance(Node* node);
   Reduction ReduceJSLoadContext(Node* node);
   Reduction ReduceJSStoreContext(Node* node);
   Reduction ReduceJSLoadModule(Node* node);
   Reduction ReduceJSStoreModule(Node* node);
   Reduction ReduceJSEqualTypeOf(Node* node, bool invert);
   Reduction ReduceJSEqual(Node* node, bool invert);
   Reduction ReduceJSStrictEqual(Node* node, bool invert);
   Reduction ReduceJSToBoolean(Node* node);
   Reduction ReduceJSToInteger(Node* node);
   Reduction ReduceJSToLength(Node* node);
@@ skipping 34 matching lines @@
   TypeCache const& type_cache_;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(JSTypedLowering::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_TYPED_LOWERING_H_