[turbofan] Use the typer to statically detect Smis.

src/compiler/change-lowering.cc

Index: src/compiler/change-lowering.cc
diff --git a/src/compiler/change-lowering.cc b/src/compiler/change-lowering.cc
index 6b39e92f6dfb62ec7d7b19d192d2d6d6d9cca4ce..0d9aa508ad671196057770dc7e38844cf4487dc6 100644
--- a/src/compiler/change-lowering.cc
+++ b/src/compiler/change-lowering.cc
@@ -165,7 +165,7 @@ Reduction ChangeLowering::ChangeInt32ToTagged(Node* value, Node* control) {
         machine()->Word64Shl(),
         graph()->NewNode(machine()->ChangeInt32ToInt64(), value),
         SmiShiftBitsConstant()));
-  } else if (NodeProperties::GetBounds(value).upper->Is(Type::Signed31())) {
+  } else if (NodeProperties::GetBounds(value).upper->Is(Type::SignedSmall())) {
     return Replace(
         graph()->NewNode(machine()->WordShl(), value, SmiShiftBitsConstant()));
   }