[all-commits] [llvm/llvm-project] 2cd829: [VectorUtils][VPlan] Consolidate VPWidenIntrinsicR...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2cd829fc2c63c7b93fa1c65f65f6d92f854ffcb7
      https://github.com/llvm/llvm-project/commit/2cd829fc2c63c7b93fa1c65f65f6d92f854ffcb7
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-05-01 (Thu, 01 May 2025)

  Changed paths:
    M llvm/lib/Analysis/VectorUtils.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    A llvm/test/Transforms/LoopVectorize/widen-intrinsic.ll

  Log Message:
  -----------
  [VectorUtils][VPlan] Consolidate VPWidenIntrinsicRecipe::onlyFirstLaneUsed and isVectorIntrinsicWithScalarOpAtArg (#137497)

We can reuse isVectorIntrinsicWithScalarOpAtArg in VectorUtils to
determine if only the first lane will be used for a
VPWidenIntrinsicRecipe, provided that we also move the VP EVL operand
check into it.

This was needed by a local patch I was working on that created a
VPWidenIntrinsicRecipe with a VP intrinsic, and prevents the need to
update the scalar arguments in two places.



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