Fix a memory leak. Patch by Nicolas Geoffray.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96295 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 91e420b..43cf37e 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -829,6 +829,7 @@
   EntryNode.UseList = 0;
   AllNodes.push_back(&EntryNode);
   Root = getEntryNode();
+  delete Ordering;
   Ordering = new SDNodeOrdering();
 }