Release build: guard dump functions with "ifndef NDEBUG"

No functional change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163344 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DominanceFrontier.cpp b/lib/Analysis/DominanceFrontier.cpp
index 1604576..5536a9b 100644
--- a/lib/Analysis/DominanceFrontier.cpp
+++ b/lib/Analysis/DominanceFrontier.cpp
@@ -133,7 +133,9 @@
   }
 }
 
+#ifndef NDEBUG
 void DominanceFrontierBase::dump() const {
   print(dbgs());
 }
+#endif