[llvm] [CodeGen][Spill2Reg] Initial patch (PR #118832)

[via llvm-commits]

vporpo wrote:

> Have you tried graphite to maintain the patch series?

Thanks for the suggestion, I will give it a try. My main concern is testing: When the patch series is off-tree then we can only do so much testing on each change we are making, which can lead to regressions that get unnoticed. Given that there is enough interest in this project, my suggestion is to start working on this in-tree.

https://github.com/llvm/llvm-project/pull/118832