[PATCH] D17592: AMDGPU/SI: Add support for spiling SGPRs to scratch buffer

[Tom Stellard via llvm-commits]

tstellarAMD created this revision.
tstellarAMD added a reviewer: arsenm.
tstellarAMD added a subscriber: llvm-commits.
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This is necessary for when we run out of VGPRs and can no
longer use v_{read,write}_lane for spilling SGPRs.

http://reviews.llvm.org/D17592

Files:
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstructions.td
  lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
  lib/Target/AMDGPU/SIMachineFunctionInfo.h
  lib/Target/AMDGPU/SIRegisterInfo.cpp

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