[llvm] [BranchFolding] Kill common hoisted debug instructions (PR #140091)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Thanks for the reproducer. I can't look just now so I've reverted (https://github.com/llvm/llvm-project/commit/29af8e59fcd8bc5795a9668f4d4dde5572df4146) in the mean time & will fix and re-land tomorrow.

https://github.com/llvm/llvm-project/pull/140091