[all-commits] [llvm/llvm-project] 8132c4: [VPlan] Also introduce broadcasts for live-ins use...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8132c4f55474d4af599b6e7e0753bc374b762fff
      https://github.com/llvm/llvm-project/commit/8132c4f55474d4af599b6e7e0753bc374b762fff
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-03-11 (Tue, 11 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/force-target-instruction-cost.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/induction-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/loop-vectorization-factors.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-epilogue.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/reduction-recurrence-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/store-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/blend-any-of-reduction-cost.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/dead-ops-cost.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/illegal-type.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/pr88802.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/truncate-to-minimal-bitwidth-cost.ll
    M llvm/test/Transforms/LoopVectorize/X86/cost-model.ll
    M llvm/test/Transforms/LoopVectorize/X86/pr109581-unused-blend.ll
    M llvm/test/Transforms/LoopVectorize/X86/scatter_crash.ll
    M llvm/test/Transforms/LoopVectorize/invariant-store-vectorization-2.ll
    M llvm/test/Transforms/LoopVectorize/pr37248.ll
    M llvm/test/Transforms/LoopVectorize/pr55167-fold-tail-live-out.ll
    M llvm/test/Transforms/LoopVectorize/reduction-small-size.ll

  Log Message:
  -----------
  [VPlan] Also introduce broadcasts for live-ins used in vec preheader.

Slightly generalize materializeLiveInBroadcasts to also introduce
broadcasts for live-ins used in the vector preheader. This should cover
all live-ins.

If the live-in is used in the vector preheader, insert the broadcast at
the beginning of the block.



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