[turbofan] Properly implement %_ClassOf intrinsic.

src/builtins/builtins.h

 // Copyright 2011 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_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 190 matching lines @@
       TypeConversion)                                                          \
   TFS(NonPrimitiveToPrimitive_String, BUILTIN, kNoExtraICState,                \
       TypeConversion)                                                          \
   TFS(StringToNumber, BUILTIN, kNoExtraICState, TypeConversion)                \
   TFS(ToName, BUILTIN, kNoExtraICState, TypeConversion)                        \
   TFS(NonNumberToNumber, BUILTIN, kNoExtraICState, TypeConversion)             \
   TFS(ToNumber, BUILTIN, kNoExtraICState, TypeConversion)                      \
   TFS(ToString, BUILTIN, kNoExtraICState, TypeConversion)                      \
   TFS(ToInteger, BUILTIN, kNoExtraICState, TypeConversion)                     \
   TFS(ToLength, BUILTIN, kNoExtraICState, TypeConversion)                      \
+  TFS(ClassOf, BUILTIN, kNoExtraICState, Typeof)                               \
   TFS(Typeof, BUILTIN, kNoExtraICState, Typeof)                                \
   TFS(GetSuperConstructor, BUILTIN, kNoExtraICState, TypeConversion)           \
                                                                                \
   /* Handlers */                                                               \
   TFS(LoadICProtoArray, HANDLER, Code::LOAD_IC, LoadICProtoArray)              \
   TFS(LoadICProtoArrayThrowIfNonexistent, HANDLER, Code::LOAD_IC,              \
       LoadICProtoArray)                                                        \
   TFS(KeyedLoadIC_Megamorphic, KEYED_LOAD_IC, kNoExtraICState, LoadWithVector) \
   TFS(KeyedLoadIC_Miss, BUILTIN, kNoExtraICState, LoadWithVector)              \
   TFS(KeyedLoadIC_Slow, HANDLER, Code::KEYED_LOAD_IC, LoadWithVector)          \
@@ skipping 707 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_