[llvm-branch-commits] [llvm] [PHIElimination] Reuse existing COPY in predecessor basic block (Take Two) (PR #146806)

[Guy David via llvm-branch-commits]

guy-david wrote:

@mikaelholmen @mstorsjo @macurtis-amd @sjoerdmeijer @sushgokh
We've decided that it's best to revert the original PR (see https://github.com/llvm/llvm-project/pull/146850), sorry for wasting your time.
This PR is trying to reintroduce it with fixes to the issues you've presented. Can I humbly ask you to test this commit one final time?

https://github.com/llvm/llvm-project/pull/146806