[llvm] [TailRecElim] Fix miscompile of returns using a non-eliminated recursive call (PR #214503)

[Federico Bruzzone via llvm-commits]

FedericoBruzzone wrote:

While I can land this PR, I think we can wait until Monday to merge it :D
Of course, feel free to go ahead and do it yourselves.

https://github.com/llvm/llvm-project/pull/214503