[all-commits] [llvm/llvm-project] bf5627: [LV] Optimize VPWidenIntOrFpInductionRecipe for kn...

[Hari Limaye via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bf5627c85e6975a73bf582cf0d23a993673413d0
      https://github.com/llvm/llvm-project/commit/bf5627c85e6975a73bf582cf0d23a993673413d0
  Author: Hari Limaye <hari.limaye at arm.com>
  Date:   2025-03-28 (Fri, 28 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/conditional-branches-cost.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/optsize_minsize.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/transform-narrow-interleave-to-widen-memory-remove-loop-region.ll
    M llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll
    M llvm/test/Transforms/LoopVectorize/SystemZ/predicated-first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/X86/consecutive-ptr-uniforms.ll
    M llvm/test/Transforms/LoopVectorize/pr45679-fold-tail-by-masking.ll
    M llvm/test/Transforms/LoopVectorize/reduction-inloop-pred.ll
    M llvm/test/Transforms/LoopVectorize/reduction-predselect.ll
    M llvm/test/Transforms/LoopVectorize/tail-folding-alloca-in-loop.ll
    A llvm/test/Transforms/LoopVectorize/tail-folding-optimize-vector-induction-width.ll
    M llvm/test/Transforms/LoopVectorize/tail-folding-switch.ll

  Log Message:
  -----------
  [LV] Optimize VPWidenIntOrFpInductionRecipe for known TC (#118828)

Optimize the IR generated for a VPWidenIntOrFpInductionRecipe to use the
narrowest type necessary, when the trip-count of a loop is known to be
constant and the only use of the recipe is the condition used by the
vector loop's backedge branch.



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