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

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/SIInstrInfo.h:580
+    return isSegmentSpecificFLAT(MI) &&
+           AMDGPU::getFlatScratchInst(MI.getOpcode()) >= 0;
   }
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foad wrote:
> If getFlatScratchInst is just a table lookup, is there any need to do the isSegmentSpecificFLAT test first?
I have reetored it to have O(1) in most cases, table lookup will only run if it is already known segmented flat. It is purely optimization.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D90505/new/

https://reviews.llvm.org/D90505