[all-commits] [llvm/llvm-project] 332fe0: [VPlan] Implement VPlan-based cost model for VPRed...

[Elvis Wang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 332fe08f1dfd41a245616bbcc9e636571aac708a
      https://github.com/llvm/llvm-project/commit/332fe08f1dfd41a245616bbcc9e636571aac708a
  Author: Elvis Wang <elvis.wang at sifive.com>
  Date:   2025-05-29 (Thu, 29 May 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-strict-fadd-cost.ll
    M llvm/test/Transforms/LoopVectorize/ARM/mve-reductions.ll
    M llvm/test/Transforms/LoopVectorize/reduction-inloop-pred.ll
    M llvm/test/Transforms/LoopVectorize/reduction-inloop.ll

  Log Message:
  -----------
  [VPlan] Implement VPlan-based cost model for VPReduction, VPExtendedReduction and VPMulAccumulateReduction.  (#113903)

This patch implement the VPlan-based cost model for VPReduction,
VPExtendedReduction and VPMulAccumulateReduction.

With this patch, we can calculate the reduction cost by the VPlan-based
cost model so remove the reduction costs in `precomputeCost()`.

Ref: Original instruction based implementation:
https://reviews.llvm.org/D93476



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