Move SDNode order propagation to SDNodeOrdering, which also fixes a missed

case of order propagation during isel.

Thanks Owen for the suggestion!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177525 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

@@ -786,7 +786,9 @@ void SelectionDAGISel::DoInstructionSelection() {
         continue;
       // Replace node.
       if (ResNode) {
+        // Propagate ordering
         CurDAG->AssignOrdering(ResNode, CurDAG->GetOrdering(Node));
+
         ReplaceUses(Node, ResNode);
       }