[PATCH] D89434: AMDGPU: Fix verifier error on killed spill of partially undef register

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
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This does unfortunately end up with extra waitcnts getting inserted
that were avoided before. Ideally we would avoid the spills of these
undef components in the first place.


https://reviews.llvm.org/D89434

Files:
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement-stack-lower.ll
  llvm/test/CodeGen/AMDGPU/spill-agpr-partially-undef.mir
  llvm/test/CodeGen/AMDGPU/spill-agpr.mir
  llvm/test/CodeGen/AMDGPU/spill-reg-tuple-super-reg-use.mir
  llvm/test/CodeGen/AMDGPU/vgpr-spill.mir

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