[all-commits] [llvm/llvm-project] 998c33: [VPlan] Mark FirstOrderRecurrenceSplice as not hav...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 998c33e5fccd421a910c0a12689b35daf73e1856
      https://github.com/llvm/llvm-project/commit/998c33e5fccd421a910c0a12689b35daf73e1856
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-06-08 (Sat, 08 Jun 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/induction-costs.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/loop-vectorization-factors.ll
    M llvm/test/Transforms/LoopVectorize/X86/fixed-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/X86/pr72969.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-chains.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-multiply-recurrences.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/scalable-first-order-recurrence.ll

  Log Message:
  -----------
  [VPlan] Mark FirstOrderRecurrenceSplice as not having side-effects.

Now that FOR exit and resume value creation is explicitly modeled in
VPlan (05e1b5340b0caf1, 07b330132c0b) it doesn't depend on the first
order recurrence splice being preserved and it can now be marked as not
having side-effects. This allows removal of first-order-recurrence-splce
if the FOR is only used in the exit or as scalar ph resume value.



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