[PATCH] D90505: [AMDGPU] Improve FLAT scratch detection

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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We were useing too broad check for isFLATScratch() which also
includes FLAT global. I do not want to burn a bit for it, so
I am using InstrMapping.


https://reviews.llvm.org/D90505

Files:
  llvm/lib/Target/AMDGPU/FLATInstructions.td
  llvm/lib/Target/AMDGPU/SIInstrInfo.h
  llvm/lib/Target/AMDGPU/SIInstrInfo.td

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