[all-commits] [llvm/llvm-project] b658a2: [LV] Reduce register usage for scaled reductions (...

[Sam Tebbs via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b658a2e74ab48fce303d009b7039fbb10482bab8
      https://github.com/llvm/llvm-project/commit/b658a2e74ab48fce303d009b7039fbb10482bab8
  Author: Sam Tebbs <samuel.tebbs at arm.com>
  Date:   2025-04-11 (Fri, 11 Apr 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPRecipeBuilder.h
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
    M llvm/lib/Transforms/Vectorize/VPlanValue.h
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/reg-usage.ll
    M llvm/test/Transforms/LoopVectorize/X86/pr47437.ll

  Log Message:
  -----------
  [LV] Reduce register usage for scaled reductions (#133090)

This PR accounts for scaled reductions in `calculateRegisterUsage` to
reflect the fact that the number of lanes in their output is smaller
than the VF.

Depends on https://github.com/llvm/llvm-project/pull/126437



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications