[PATCH] D112076: [AArch64][SVE][InstCombine] Combine contiguous gather/scatter to load/store

[Peter Waller via Phabricator via llvm-commits]

peterwaller-arm created this revision.
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Contiguous gather => masked load:

  (sve.ld1.gather.index Mask BasePtr (sve.index IndexBase 1))
  => (masked.load (gep BasePtr IndexBase) Align Mask undef)

Contiguous scatter => masked store:

  (sve.ld1.scatter.index Value Mask BasePtr (sve.index IndexBase 1))
  => (masked.store (gep BasePtr IndexBase) Align Mask undef)

Tests with <vscale x 2 x double>:

[Gather, Scatter] for each [Positive test (index=1), Negative test (index=2), Alignment propagation].


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112076

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Transforms/InstCombine/AArch64/sve-intrinsic-gatherscatter.ll

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