[all-commits] [llvm/llvm-project] 071d1f: [LV] Use VPReductionRecipe for partial reductions ...

[Sam Tebbs via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 071d1fb8beda4c0ec9ede0acab12a382f34758fe
      https://github.com/llvm/llvm-project/commit/071d1fb8beda4c0ec9ede0acab12a382f34758fe
  Author: Sam Tebbs <samuel.tebbs at arm.com>
  Date:   2025-11-26 (Wed, 26 Nov 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
    M llvm/lib/Transforms/Vectorize/VPlanValue.h
    M llvm/test/Transforms/LoopVectorize/AArch64/vplan-printing.ll
    M llvm/unittests/Transforms/Vectorize/VPlanTest.cpp

  Log Message:
  -----------
  [LV] Use VPReductionRecipe for partial reductions (#147513)

Partial reductions can easily be represented by the VPReductionRecipe
class by setting their scale factor to something greater than 1. This PR
merges the two together and gives VPReductionRecipe a VFScaleFactor so
that it can choose to generate the partial reduction intrinsic at
execute time.

Stacked PRs:
1. https://github.com/llvm/llvm-project/pull/147026
2. https://github.com/llvm/llvm-project/pull/147255
3. https://github.com/llvm/llvm-project/pull/156976
4. https://github.com/llvm/llvm-project/pull/160154
5. https://github.com/llvm/llvm-project/pull/147302
6. https://github.com/llvm/llvm-project/pull/162503
7. -> https://github.com/llvm/llvm-project/pull/147513

Replaces https://github.com/llvm/llvm-project/pull/146073 .



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