[PATCH] D124852: [AMDGPU] Enable copying SCC

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
foad added reviewers: arsenm, piotr.
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Implement support in SIRegisterInfo::getCrossCopyRegClass for
copying SCC via an SGPR. Remove a restriction from the scalar
select pattern to take advantage of this. The effect is that more
uniform selects can be selected to s_cselect instead of v_cndmask.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124852

Files:
  llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/lib/Target/AMDGPU/SOPInstructions.td
  llvm/test/CodeGen/AMDGPU/expand-scalar-carry-out-select-user.ll
  llvm/test/CodeGen/AMDGPU/extract_vector_dynelt.ll
  llvm/test/CodeGen/AMDGPU/setcc-multiple-use.ll

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