[PATCH] D120912: [AArch64][SVE] Convert gather/scatter with a stride of 2 to contiguous loads/stores

[Kerry McLaughlin via Phabricator via llvm-commits]

kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, david-arm, CarolineConcatto, peterwaller-arm.
Herald added subscribers: psnobl, hiraditya, kristof.beyls, tschuett.
Herald added a reviewer: efriedma.
Herald added a project: All.
kmclaughlin requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

This patch extends `performMaskedGatherScatterCombine` to find gathers
& scatters with a stride of two in their indices, which can be converted
to a pair of contiguous loads or stores with zips & uzps and the
appropriate predicates.

There were no performance improvements found using this combine for scatter
stores of 64 bit data, so we just return SDValue() in this case.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120912

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve-gather-scatter-to-contiguous.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D120912.412730.patch
Type: text/x-patch
Size: 11672 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220303/b05597bd/attachment.bin>