Fix build failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/Reassociate.cpp b/lib/Transforms/Scalar/Reassociate.cpp
index c220c2b..c33e320 100644
--- a/lib/Transforms/Scalar/Reassociate.cpp
+++ b/lib/Transforms/Scalar/Reassociate.cpp
@@ -53,7 +53,7 @@
   }
 }
 
-#ifndef DEBUG
+#ifndef NDEBUG
 /// PrintOps - Print out the expression identified in the Ops list.
 ///
 static void PrintOps(Instruction *I, const std::vector<ValueEntry> &Ops) {