[Interpreter] Add ClassOf intrinsic.

test/cctest/interpreter/test-interpreter-intrinsics.cc

 // Copyright 2015 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.
 
 #include "src/v8.h"
 
 #include "src/interpreter/interpreter-intrinsics.h"
 #include "test/cctest/interpreter/interpreter-tester.h"
 
 namespace v8 {
@@ skipping 249 matching lines @@
   CHECK_EQ(*factory->true_value(), *helper.Invoke(helper.NewObject("true")));
   CHECK_EQ(*factory->false_value(),
            *helper.Invoke(helper.NewObject("new Object(false)")));
 
   CHECK(helper.Invoke(helper.NewObject("'foobar'"))
             ->SameValue(*helper.NewObject("'foobar'")));
   CHECK(helper.Invoke(helper.NewObject("new Object('foobar')"))
             ->SameValue(*helper.NewObject("'foobar'")));
 }
 
+TEST(ClassOf) {
+  HandleAndZoneScope handles;
+  Isolate* isolate = handles.main_isolate();
+  Factory* factory = isolate->factory();
+  InvokeIntrinsicHelper helper(handles.main_isolate(), handles.main_zone(),
+                               Runtime::kInlineClassOf);
+  CHECK_EQ(*helper.Invoke(helper.NewObject("123")), *factory->null_value());
+  CHECK_EQ(*helper.Invoke(helper.NewObject("'true'")), *factory->null_value());
+  CHECK_EQ(*helper.Invoke(helper.NewObject("'foo'")), *factory->null_value());
+  CHECK(helper.Invoke(helper.NewObject("({a:1})"))
+            ->SameValue(*helper.NewObject("'Object'")));
+  CHECK(helper.Invoke(helper.NewObject("(function foo() {})"))
+            ->SameValue(*helper.NewObject("'Function'")));
+  CHECK(helper.Invoke(helper.NewObject("new Date()"))
+            ->SameValue(*helper.NewObject("'Date'")));
+  CHECK(helper.Invoke(helper.NewObject("new Set"))
+            ->SameValue(*helper.NewObject("'Set'")));
+  CHECK(helper.Invoke(helper.NewObject("/x/"))
+            ->SameValue(*helper.NewObject("'RegExp'")));
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8