[all-commits] [llvm/llvm-project] 1afba1: [VPlan] Try to narrow wide and replicating recipes...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1afba19913253dda865a8e57b37b9f4dabead1ac
      https://github.com/llvm/llvm-project/commit/1afba19913253dda865a8e57b37b9f4dabead1ac
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-01-12 (Sun, 12 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll
    M llvm/test/Transforms/LoopVectorize/X86/gep-use-outside-loop.ll
    M llvm/test/Transforms/LoopVectorize/scalable-assume.ll

  Log Message:
  -----------
  [VPlan] Try to narrow wide and replicating recipes to uniform recipes.

Use the existing VPlan-based analysis to identify recipes that only have
their first lane demanded and transform them to uniform recpliate
recipes. This simplifies the generated code in some places and prepares
for fixing https://github.com/llvm/llvm-project/issues/122496.



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