[llvm] [JumpThreading][DebugInfo] Propagate DebugLocs when simplifying loads (PR #157683)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams approved this pull request.

Makes sense to me, LGTM! The comments in the test are appreciated

https://github.com/llvm/llvm-project/pull/157683