[PATCH] D123409: [AArch64] Use PerfectShuffle costs in AArch64TTIImpl::getShuffleCost

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, labrinea, samtebbs, jaykang10.
Herald added subscribers: hiraditya, kristof.beyls.
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dmgreen requested review of this revision.
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Given a shuffle with 4 elements size 16 or 32, we can use the costs directly from the PerfectShuffle tables to get a slightly more accurate cost for the resulting shuffle.


https://reviews.llvm.org/D123409

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64PerfectShuffle.h
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/AArch64/shuffle-other.ll
  llvm/test/Analysis/CostModel/AArch64/shuffle-select.ll
  llvm/test/Transforms/PhaseOrdering/AArch64/matrix-extract-insert.ll

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