--- lib/CodeGen/Analysis.cpp.orig	2020-03-26 15:48:08 UTC
+++ lib/CodeGen/Analysis.cpp
@@ -538,11 +538,10 @@ bool llvm::isInTailCallPosition(ImmutableCallSite CS, 
       // Debug info intrinsics do not get in the way of tail call optimization.
       if (isa<DbgInfoIntrinsic>(BBI))
         continue;
-      // A lifetime end or assume intrinsic should not stop tail call
+      // An assume intrinsic should not stop tail call
       // optimization.
       if (const IntrinsicInst *II = dyn_cast<IntrinsicInst>(BBI))
-        if (II->getIntrinsicID() == Intrinsic::lifetime_end ||
-            II->getIntrinsicID() == Intrinsic::assume)
+        if (II->getIntrinsicID() == Intrinsic::assume)
           continue;
       if (BBI->mayHaveSideEffects() || BBI->mayReadFromMemory() ||
           !isSafeToSpeculativelyExecute(&*BBI))