[PATCH] D115145: [Analysis][AArch64] Add on overhead costs for fixed-width gathers and scatters

[David Sherwood via Phabricator via llvm-commits]

david-arm created this revision.
david-arm added reviewers: sdesmalen, CarolineConcatto, RosieSumpter, dmgreen.
Herald added subscribers: ctetreau, hiraditya, kristof.beyls.
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This patches increases the cost of fixed-width gathers and scatters that
will end up scalarising anyway. When SVE is enabled the vectoriser will currently
still often favour fixed-width vectorisation for AArch64 with gathers and
scatters even when the scalar loop is actually faster.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115145

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/AArch64/mem-op-cost-model.ll

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