[all-commits] [llvm/llvm-project] ca4ebf: [SLP]Support LShr as base for copyable elements

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ca4ebf95172d24f8c47655709b2c9eb85bda5cb2
      https://github.com/llvm/llvm-project/commit/ca4ebf95172d24f8c47655709b2c9eb85bda5cb2
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2025-08-14 (Thu, 14 Aug 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/alternate-vectorization-split-node.ll
    M llvm/test/Transforms/SLPVectorizer/X86/load-merge-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/load-merge.ll

  Log Message:
  -----------
  [SLP]Support LShr as base for copyable elements

Added support for LShr instructions as base for copyable elements. Also,
added simple analysis for best base instruction selection, if multiple
candidates are available.

Reviewers: hiraditya, RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/153393



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