TurboFan: Introduce TaggedSigned and TaggedPointer representations.

src/compiler/representation-change.cc

Index: src/compiler/representation-change.cc
diff --git a/src/compiler/representation-change.cc b/src/compiler/representation-change.cc
index a8d8b9264c07675eb43f36b8590e40850746330f..5427bdb1cd83bcd8589cfaf860df8004e6c498f7 100644
--- a/src/compiler/representation-change.cc
+++ b/src/compiler/representation-change.cc
@@ -141,6 +141,8 @@ Node* RepresentationChanger::GetRepresentationFor(
   }
 
   switch (use_info.representation()) {
+    case MachineRepresentation::kTaggedSigned:
+    case MachineRepresentation::kTaggedPointer:
     case MachineRepresentation::kTagged:
       DCHECK(use_info.type_check() == TypeCheckKind::kNone);
       return GetTaggedRepresentationFor(node, output_rep, output_type);