Index: lib/Target/ARM/ARMParallelDSP.cpp
===================================================================
--- lib/Target/ARM/ARMParallelDSP.cpp
+++ lib/Target/ARM/ARMParallelDSP.cpp
@@ -64,6 +64,7 @@
     bool          ReadOnly = true;
 
     OpChain(Instruction *I, ValueList &vl) : Root(I), AllValues(vl) { }
+    virtual ~OpChain() = default;
 
     void SetMemoryLocations() {
       const auto Size = MemoryLocation::UnknownSize;