[PATCH] D119031: AMDGPU: Use reserved VGPR for AGPR spills to memory

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
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Previously would reuse the VGPR used for large frame offsets with the
one needed for copying from the AGPR. Fix this by reusing the register
we already reserved for handling AGPR to AGPR copies.


https://reviews.llvm.org/D119031

Files:
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/test/CodeGen/AMDGPU/accvgpr-spill-scc-clobber.mir
  llvm/test/CodeGen/AMDGPU/agpr-copy-no-free-registers.ll
  llvm/test/CodeGen/AMDGPU/pei-build-av-spill.mir
  llvm/test/CodeGen/AMDGPU/pei-build-spill.mir
  llvm/test/CodeGen/AMDGPU/spill-agpr-partially-undef.mir
  llvm/test/CodeGen/AMDGPU/spill-agpr.ll
  llvm/test/CodeGen/AMDGPU/spill-agpr.mir