[turbofan] Properly implement %_ClassOf intrinsic.

src/compiler/js-operator.cc

 // 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.
 
 #include "src/compiler/js-operator.h"
 
 #include <limits>
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
@@ skipping 510 matching lines @@
   V(ToInteger, Operator::kNoProperties, 1, 1)                   \
   V(ToLength, Operator::kNoProperties, 1, 1)                    \
   V(ToName, Operator::kNoProperties, 1, 1)                      \
   V(ToNumber, Operator::kNoProperties, 1, 1)                    \
   V(ToObject, Operator::kFoldable, 1, 1)                        \
   V(ToString, Operator::kNoProperties, 1, 1)                    \
   V(Create, Operator::kEliminatable, 2, 1)                      \
   V(CreateIterResultObject, Operator::kEliminatable, 2, 1)      \
   V(CreateKeyValueArray, Operator::kEliminatable, 2, 1)         \
   V(HasProperty, Operator::kNoProperties, 2, 1)                 \
+  V(ClassOf, Operator::kPure, 1, 1)                             \
   V(TypeOf, Operator::kPure, 1, 1)                              \
   V(InstanceOf, Operator::kNoProperties, 2, 1)                  \
   V(OrdinaryHasInstance, Operator::kNoProperties, 2, 1)         \
   V(ForInNext, Operator::kNoProperties, 4, 1)                   \
   V(ForInPrepare, Operator::kNoProperties, 1, 3)                \
   V(LoadMessage, Operator::kNoThrow | Operator::kNoWrite, 0, 1) \
   V(StoreMessage, Operator::kNoRead | Operator::kNoThrow, 1, 0) \
   V(GeneratorRestoreContinuation, Operator::kNoThrow, 1, 1)     \
   V(StackCheck, Operator::kNoWrite, 0, 0)                       \
   V(GetSuperConstructor, Operator::kNoWrite, 1, 1)
@@ skipping 466 matching lines @@
   return new (zone()) Operator1<Handle<ScopeInfo>>(               // --
       IrOpcode::kJSCreateScriptContext, Operator::kNoProperties,  // opcode
       "JSCreateScriptContext",                                    // name
       1, 1, 1, 1, 1, 2,                                           // counts
       scope_info);                                                // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8