ES6: Faster implementation of OrdinaryHasInstance

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index f736fd5a719d37c1675fd831b9aaf738f398830f..1dcce39a0b3df56c5dc86ae66d008ef0de1b6bb6 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -1021,9 +1021,16 @@ class GrowArrayElementsStub : public 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);
 };