[Polly] Clang complains about missing virtual destructor

Summary: Feel free to reassign if needed.

Reviewers: mhalk, bollu, jdoerfert

Reviewed By: jdoerfert

Subscribers: jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64786

llvm-svn: 366697

polly/include/polly/CodeGen/LoopGenerators.h

@@ -118,6 +118,8 @@ public:
             Type::getIntNTy(Builder.getContext(), DL.getPointerSizeInBits())),
         M(Builder.GetInsertBlock()->getParent()->getParent()) {}
 
+  virtual ~ParallelLoopGenerator() {}
+
   /// Create a parallel loop.
   ///
   /// This function is the main function to automatically generate a parallel