[PATCH] D101945: [LV] Add -scalable-vectorization=<option> flag.

Sander de Smalen via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed May 5 14:01:58 PDT 2021


sdesmalen created this revision.
Herald added subscribers: frasercrmck, luismarques, apazos, sameer.abuasal, s.egerton, Jim, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
sdesmalen requested review of this revision.
Herald added subscribers: llvm-commits, MaskRay.
Herald added a project: LLVM.

This patch adds a new option to the LoopVectorizer to control how
scalable vectors can be used.

Initially, this suggests three levels to control scalable
vectorization, although other more aggressive options can be added in
the future.

The possible options are:

- Disabled:   Disables vectorization with scalable vectors.
- Enabled:    Vectorize loops using scalable vectors or fixed-width vectors, whichever is most profitable. Favours fixed-width vectors when the cost is a tie.
- Preferred:  Like 'Enabled', but favoring scalable vectors when the cost-model is inconclusive.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101945

Files:
  llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h
  llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/AArch64/masked-op-cost.ll
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-reductions.ll
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-strict-fadd.ll
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-vf-analysis.ll
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-vf-hint.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-basic-vec.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-cond-inv-loads.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-extract-last-veclane.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-gather-scatter.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-inductions.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-inv-loads.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-large-strides.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-masked-loadstore.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-type-conv.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-vector-reverse-mask4.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-vector-reverse.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-widen-phi.ll
  llvm/test/Transforms/LoopVectorize/RISCV/scalable-vf-hint.ll
  llvm/test/Transforms/LoopVectorize/metadata-width.ll
  llvm/test/Transforms/LoopVectorize/optimal-epilog-vectorization-scalable.ll
  llvm/test/Transforms/LoopVectorize/scalable-loop-unpredicated-body-scalar-tail.ll
  llvm/test/Transforms/LoopVectorize/scalable-vf-hint.ll

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