[all-commits] [llvm/llvm-project] 0e3049: [SLP]Support revectorization of the previously vec...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e3049c562ccdea288c3b1f3b3d1ce5992d284b0
      https://github.com/llvm/llvm-project/commit/0e3049c562ccdea288c3b1f3b3d1ce5992d284b0
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2025-04-01 (Tue, 01 Apr 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/reused-scalar-repeated-in-node.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/vec3-reorder-reshuffle.ll
    M llvm/test/Transforms/SLPVectorizer/X86/cast-operand-extracted.ll
    M llvm/test/Transforms/SLPVectorizer/X86/scatter-vectorize-reorder.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vec3-reorder-reshuffle.ll

  Log Message:
  -----------
  [SLP]Support revectorization of the previously vectorized scalars

If the scalar instructions is marked for the vectorization in the tree,
it cannot be vectorized as part of the another node in the same tree, in
general. It may prevent some potentially profitable vectorization
opportunities, since some nodes end up being buildvector/gather nodes,
which add to the total cost.
Patch allows revectorization of the previously vectorized scalars.

Reviewers: hiraditya, RKSimon

Reviewed By: RKSimon, hiraditya

Pull Request: https://github.com/llvm/llvm-project/pull/133091



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