Index: lib/Transforms/Utils/Local.cpp
===================================================================
--- lib/Transforms/Utils/Local.cpp
+++ lib/Transforms/Utils/Local.cpp
@@ -1930,7 +1930,8 @@
     CallInst *CallTrap = CallInst::Create(TrapFn, "", I);
     CallTrap->setDebugLoc(I->getDebugLoc());
   }
-  new UnreachableInst(I->getContext(), I);
+  auto *UI = new UnreachableInst(I->getContext(), I);
+  UI->setDebugLoc(I->getDebugLoc());
 
   // All instructions after this are dead.
   unsigned NumInstrsRemoved = 0;