[all-commits] [llvm/llvm-project] 3c5e0d: [LoopVectorize] Clear cache of `LoopAccessInfoMana...

Miguel Saldivar via All-commits all-commits at lists.llvm.org
Wed Jan 11 01:04:13 PST 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3c5e0d87f80efa8068a58768514d916d9dc03f3d
  Author: Miguel Saldivar <saldivarcher at gmail.com>
  Date:   2023-01-11 (Wed, 11 Jan 2023)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    A llvm/test/Transforms/LoopVectorize/pr59319-loop-access-info-invalidation.ll

  Log Message:
  [LoopVectorize] Clear cache of `LoopAccessInfoManager`

LAI is cached during the LoopDistribute pass, and is later re-used during LoopVectorize. The problem is that LoopVectorize changes SCEV, and the cached LAI does not get updated. Hence, when re-using the cached LAI, it references an invalid SCEV.

Fixes #59319

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D139601

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