[PATCH] D93715: AMDGPU: Don't fold AGPR copy pairs that need a temp VGPR

[Austin Kerbow via Phabricator via llvm-commits]

kerbowa added a comment.

I'm working on eliminating some AGPR->VGPR->AGPR copies which commonly cause problems in loops where the VGPR is considered live across iterations by the register allocator even if the VGPR copy should be sunk. Why do we need this temp VGPR?


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  https://reviews.llvm.org/D93715/new/

https://reviews.llvm.org/D93715