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

src/machine-type.h

Index: src/machine-type.h
diff --git a/src/machine-type.h b/src/machine-type.h
index bcc85b3e7c0f42bce6a19984bd0baf8d5b03d4c6..50832fc1748bbee770f261b9da344882a84af649 100644
--- a/src/machine-type.h
+++ b/src/machine-type.h
@@ -119,6 +119,14 @@ class MachineType {
     return MachineType(MachineRepresentation::kWord64,
                        MachineSemantic::kUint64);
   }
+  static MachineType TaggedPointer() {
+    return MachineType(MachineRepresentation::kTaggedPointer,
+                       MachineSemantic::kAny);
+  }
+  static MachineType TaggedSigned() {
+    return MachineType(MachineRepresentation::kTaggedSigned,
+                       MachineSemantic::kInt32);
+  }
   static MachineType AnyTagged() {
     return MachineType(MachineRepresentation::kTagged, MachineSemantic::kAny);
   }