[all-commits] [llvm/llvm-project] 1860fd: [LV] Autovectorization for the all-in-one histogra...

[Graham Hunter via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1860fd049e35055fccac14e439227fae803976b8
      https://github.com/llvm/llvm-project/commit/1860fd049e35055fccac14e439227fae803976b8
  Author: Graham Hunter <graham.hunter at arm.com>
  Date:   2024-07-11 (Thu, 11 Jul 2024)

  Changed paths:
    M llvm/include/llvm/Analysis/LoopAccessAnalysis.h
    M llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h
    M llvm/lib/Analysis/LoopAccessAnalysis.cpp
    M llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp
    M llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPRecipeBuilder.h
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanValue.h
    A llvm/test/Analysis/LoopAccessAnalysis/histogram.ll
    A llvm/test/Transforms/LoopVectorize/AArch64/sve2-histcnt.ll

  Log Message:
  -----------
  [LV] Autovectorization for the all-in-one histogram intrinsic (#91458)

This patch implements limited loop vectorization support for the 'all-in-one' histogram intrinsic. The feature is disabled by default, and when enabled will only vectorize if there are no other users of values in the gather-modify-scatter sequence.



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