Index: lib/Transforms/Vectorize/VPlan.h
===================================================================
--- lib/Transforms/Vectorize/VPlan.h
+++ lib/Transforms/Vectorize/VPlan.h
@@ -1060,6 +1060,8 @@
       VPBlockBase::deleteCFG(Entry);
     for (auto &MapEntry : Value2VPValue)
       delete MapEntry.second;
+    for (VPValue *Def: VPExternalDefs)
+      delete Def;
   }
 
   /// Generate the IR code for this VPlan.