[all-commits] [llvm/llvm-project] 5ab743: [LV] Add support for partial reduction chains with...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5ab7435196ce395fc0713f4034e65fcaee67e63e
      https://github.com/llvm/llvm-project/commit/5ab7435196ce395fc0713f4034e65fcaee67e63e
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2026-05-26 (Tue, 26 May 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-costs.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fdot-product.ll
    R llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll

  Log Message:
  -----------
  [LV] Add support for partial reduction chains with fsubs. (#197114)

The cost-model prevented this from happening, but the LV would otherwise
generate incorrect code (i.e. without the fneg).



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