[PATCH] D117014: AMDGPU: Use removeAllRegUnitsForPhysReg()

[Ruiling, Song via Phabricator via llvm-commits]

ruiling added a comment.
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I agree we need to figure out why register coalescer would introduce the liveness for sub-registers of reserved physical register, but I currently don't have enough time to work on that. I think that can be done separately without blocking this change. I would like to apply this change to fix the issue here if no objection. I noticed we already has a bug-report against this issue https://github.com/llvm/llvm-project/issues/54202.


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