[PATCH] D34189: AMDGPU: Avoid saving/restoring reserved m0 register

[Tom Stellard via Phabricator via llvm-commits]

tstellar added a comment.

> This changes the code to assume that m0 is available since it is
>  reserved so we shouldn't have any longer liveranges crossing potential
>  spill/reload places.

m0 could potentially be live for the whole program, so this assumption is not correct.


Repository:
  rL LLVM

https://reviews.llvm.org/D34189