[PATCH] D135950: [AArch64][SME] Disable (SLP|Loop)Vectorizer when function may be executed in streaming mode.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
sdesmalen added reviewers: aemerson, kmclaughlin, paulwalker-arm.
Herald added subscribers: vporpo, ctetreau, hiraditya, kristof.beyls.
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sdesmalen requested review of this revision.
Herald added subscribers: llvm-commits, pcwang-thead, alextsao1999.
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When the SME attributes tell that a function is or may be executed in Streaming
SVE mode, we currently need to be conservative and disable _any_ vectorization
(fixed or scalable) because the code-generator does not yet support generating
streaming-compatible code.

Scalable auto-vec will be gradually enabled in the future when we have
confidence that the loop-vectorizer won't use any SVE or NEON instructions
that are illegal in Streaming SVE mode.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135950

Files:
  llvm/lib/Target/AArch64/AArch64Subtarget.cpp
  llvm/lib/Target/AArch64/AArch64Subtarget.h
  llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/test/Transforms/LoopVectorize/AArch64/sme-vectorize.ll

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