More work to allow dag combiner to promote 16-bit ops to 32-bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101621 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 9082fb6..4b7fb86 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -355,7 +355,7 @@
     InWorklist.insert(I);
   }
 
-  TargetLowering::TargetLoweringOpt TLO(*CurDAG, true);
+  TargetLowering::TargetLoweringOpt TLO(*CurDAG, true, true, true);
   while (!Worklist.empty()) {
     SDNode *N = Worklist.pop_back_val();
     InWorklist.erase(N);