Index: lib/Transforms/Utils/CloneFunction.cpp
===================================================================
--- lib/Transforms/Utils/CloneFunction.cpp
+++ lib/Transforms/Utils/CloneFunction.cpp
@@ -52,6 +52,8 @@
   for (BasicBlock::const_iterator II = BB->begin(), IE = BB->end();
        II != IE; ++II) {
 
+    if (!DIFinder && II->getDebugLoc())
+      VMap.MD()[II->getDebugLoc()].reset(II->getDebugLoc());
     if (DIFinder && TheModule) {
       if (auto *DDI = dyn_cast<DbgDeclareInst>(II))
         DIFinder->processDeclare(*TheModule, DDI);