[Turbofan]: Use new MachineTypes in access-builder.

src/compiler/instruction.h

 // 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.
 
 #ifndef V8_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 1326 matching lines @@
   InstructionBlock* GetInstructionBlock(int instruction_index) const;
 
   static MachineRepresentation DefaultRepresentation() {
     return MachineType::PointerRepresentation();
   }
   MachineRepresentation GetRepresentation(int virtual_register) const;
   void MarkAsRepresentation(MachineRepresentation rep, int virtual_register);
 
   bool IsReference(int virtual_register) const {
     return GetRepresentation(virtual_register) ==
-           MachineRepresentation::kTagged;
+               MachineRepresentation::kTagged ||
+           GetRepresentation(virtual_register) ==
+               MachineRepresentation::kTaggedPointer;
   }
   bool IsFP(int virtual_register) const {
     return IsFloatingPoint(GetRepresentation(virtual_register));
   }
   bool IsFloat(int virtual_register) const {
     return GetRepresentation(virtual_register) ==
            MachineRepresentation::kFloat32;
   }
   bool IsDouble(int virtual_register) const {
     return GetRepresentation(virtual_register) ==
@@ skipping 130 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_