Make variable name more explicit and eliminate redundant lookup in SDNodeOrdering

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177600 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SDNodeOrdering.h b/lib/CodeGen/SelectionDAG/SDNodeOrdering.h
index 74010a8096c654b86cedcff932aab4f7a1a809e2..7e7b8974be4880c34ef9eb4dae9e7b427a16e5b4 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SDNodeOrdering.h
+++ b/lib/CodeGen/SelectionDAG/SDNodeOrdering.h
@@ -33,10 +33,10 @@ class SDNodeOrdering {
 public:
   SDNodeOrdering() {}
 
-  void add(const SDNode *Node, unsigned O) {
-    unsigned OldOrder = getOrder(Node);
-    if (OldOrder == 0 || (OldOrder > 0 && O < OldOrder))
-      OrderMap[Node] = O;
+  void add(const SDNode *Node, unsigned NewOrder) {
+    unsigned &OldOrder = OrderMap[Node];
+    if (OldOrder == 0 || (OldOrder > 0 && NewOrder < OldOrder))
+      OldOrder = NewOrder;
   }
   void remove(const SDNode *Node) {
     DenseMap<const SDNode*, unsigned>::iterator Itr = OrderMap.find(Node);