[PATCH] D102253: [AArch64][LoopVectorize] Add AArch64TTIImpl::isLegalToVectorizeType function

[Kerry McLaughlin via Phabricator via llvm-commits]

kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, david-arm, CarolineConcatto, joechrisellis.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls, inglorion.
kmclaughlin requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

This function was added to query whether a given element type can be
vectorized; for SVE this should return false for element types such as
i128 which are not supported. This fixes loops such as the following, which
currently crash with "Cannot legalize this vector" when compiled with SVE:

  int foo(__int128_t* ptr, int N)
    #pragma clang loop vectorize_width(4, scalable)
    for (int i=0; i<N; ++i)
      ptr[i] = ptr[i] + 42;


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D102253

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-reductions.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-illegal-type.ll

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