[X86] Use MVT::i32 for the type of a MOV32r0 created in X86DAGToDAGISel::Select.

Not sure if this really matters. The VT isn't really used after
this point. At best it might affect CSE.

Author: topperc

llvm/lib/Target/X86/X86ISelDAGToDAG.cpp

@@ -4946,7 +4946,8 @@ void X86DAGToDAGISel::Select(SDNode *Node) {
           SDValue(CurDAG->getMachineNode(SExtOpcode, dl, MVT::Glue, InFlag),0);
       } else {
         // Zero out the high part, effectively zero extending the input.
-        SDValue ClrNode = SDValue(CurDAG->getMachineNode(X86::MOV32r0, dl, NVT), 0);
+        SDValue ClrNode =
+            SDValue(CurDAG->getMachineNode(X86::MOV32r0, dl, MVT::i32), 0);
         switch (NVT.SimpleTy) {
         case MVT::i16:
           ClrNode =