[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..0a519cf0bc4145a8f3154ac092f2a73224d16133 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);
   }
@@ -214,6 +222,11 @@ inline bool IsFloatingPoint(MachineRepresentation rep) {
          rep == MachineRepresentation::kSimd128;
 }
 
+inline bool CanBeTaggedPointer(MachineRepresentation rep) {
+  return rep == MachineRepresentation::kTagged ||
+         rep == MachineRepresentation::kTaggedPointer;
+}
+
 // Gets the log2 of the element size in bytes of the machine type.
 inline int ElementSizeLog2Of(MachineRepresentation rep) {
   switch (rep) {