diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 63f998a..7ef8f7c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -745,6 +745,7 @@
   return Node;
 }
 
+#ifndef NDEBUG
 /// VerifyNodeCommon - Sanity check the given node.  Aborts if it is invalid.
 static void VerifyNodeCommon(SDNode *N) {
   switch (N->getOpcode()) {
@@ -816,6 +817,7 @@
 
   VerifyNodeCommon(N);
 }
+#endif // NDEBUG
 
 /// getEVTAlignment - Compute the default alignment value for the
 /// given type.