ES6: Faster implementation of OrdinaryHasInstance

src/code-stubs.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_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 1003 matching lines @@
   class ElementsKindBits : public BitField<ElementsKind, 0, 8> {};
   class IsJsArrayBits : public BitField<bool, ElementsKindBits::kNext, 1> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(GrowArrayElements);
   DEFINE_HYDROGEN_CODE_STUB(GrowArrayElements, HydrogenCodeStub);
 };
 
 
 class InstanceOfStub final : public PlatformCodeStub {
  public:
-  explicit InstanceOfStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
+  explicit InstanceOfStub(Isolate* isolate, bool es6_instanceof = false)
+      : PlatformCodeStub(isolate) {
+    minor_key_ = ES6_InstanceOf::encode(es6_instanceof);
+  }
+
+  bool is_es6_instanceof() const { return ES6_InstanceOf::decode(minor_key_); }
 
  private:
+  class ES6_InstanceOf : public BitField<bool, 0, 1> {};
+
   DEFINE_CALL_INTERFACE_DESCRIPTOR(InstanceOf);
   DEFINE_PLATFORM_CODE_STUB(InstanceOf, PlatformCodeStub);
 };
 
 
 enum AllocationSiteOverrideMode {
   DONT_OVERRIDE,
   DISABLE_ALLOCATION_SITES,
   LAST_ALLOCATION_SITE_OVERRIDE_MODE = DISABLE_ALLOCATION_SITES
 };
@@ skipping 1941 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_