[PATCH] D113829: AMDGPU: Mark prolog/epilog SCC defs as dead

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
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A future change will add SCC liveness checks. Since we are still
relying on forward register scavenging, add dead flags to avoid
spuriously detecting SCC as live.


https://reviews.llvm.org/D113829

Files:
  llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/dynamic-alloca-uniform.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/non-entry-alloca.ll
  llvm/test/CodeGen/AMDGPU/gfx-callable-return-types.ll
  llvm/test/CodeGen/AMDGPU/lds-atomic-fmin-fmax.ll
  llvm/test/CodeGen/AMDGPU/non-entry-alloca.ll
  llvm/test/CodeGen/AMDGPU/pei-reg-scavenger-position.mir
  llvm/test/CodeGen/AMDGPU/pei-scavenge-sgpr-carry-out.mir
  llvm/test/CodeGen/AMDGPU/pei-scavenge-sgpr-gfx9.mir
  llvm/test/CodeGen/AMDGPU/pei-scavenge-sgpr.mir
  llvm/test/CodeGen/AMDGPU/pei-scavenge-vgpr-spill.mir
  llvm/test/CodeGen/AMDGPU/sgpr-spill.mir
  llvm/test/CodeGen/AMDGPU/spill-reg-tuple-super-reg-use.mir
  llvm/test/CodeGen/AMDGPU/spill-special-sgpr.mir

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