Index: include/llvm/Support/GenericDomTreeConstruction.h
===================================================================
--- include/llvm/Support/GenericDomTreeConstruction.h
+++ include/llvm/Support/GenericDomTreeConstruction.h
@@ -255,8 +255,6 @@
   // Free temporary memory used to construct idom's
   DT.IDoms.clear();
   DT.Info.clear();
-
-  DT.updateDFSNumbers();
 }
 }