[llvm] [AMDGPU] Optimize rotate instruction selection patterns (PR #143551)

[Aleksandar Spasojevic via llvm-commits]

aleksandar-amd wrote:

I do have some stashed changes for this third approach, though the implementation isn’t fully finished yet. If you believe this direction is acceptable, I can continue and complete the patch.


https://github.com/llvm/llvm-project/pull/143551