[PATCH] D72919: [AArch64] Add custom store lowering for 256 bit non-temporal stores.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: dmgreen, samparker, t.p.northover, ab.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.

Currently we fail to lower non-termporal stores for 256+ bit vectors
to STNPQ, because type legalization will split them up to 128 bit stores
and because there are no single non-temporal stores, creating STPNQ
in the Load/Store optimizer would be quite tricky.

This patch adds custom lowering for 256 bit non-temporal vector stores
to improve the generated code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72919

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/nontemporal.ll

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