Clear DbgValues in the end.

llvm-svn: 136503
diff --git a/llvm/lib/Transforms/Scalar/Reassociate.cpp b/llvm/lib/Transforms/Scalar/Reassociate.cpp
index 578e8e0..1080b75 100644
--- a/llvm/lib/Transforms/Scalar/Reassociate.cpp
+++ b/llvm/lib/Transforms/Scalar/Reassociate.cpp
@@ -1130,6 +1130,7 @@
   // We are done with the rank map.
   RankMap.clear();
   ValueRankMap.clear();
+  DbgValues.clear();
   return MadeChange;
 }