[llvm] [AMDGPU] Introduce Next-Use Analysis for SSA-based Register Allocation (PR #156079)

[via llvm-commits]

alex-t wrote:

@arsenm, All your comments have been addressed.
Could you please take another look when you have time, or forward this to someone else if you think that would be more appropriate?

https://github.com/llvm/llvm-project/pull/156079