[all-commits] [llvm/llvm-project] cf6a45: [SLP]Fix same/alternate analysis in split node ana...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cf6a452cc734e00a1207514bb1fc2b123e31bb5f
      https://github.com/llvm/llvm-project/commit/cf6a452cc734e00a1207514bb1fc2b123e31bb5f
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2025-03-31 (Mon, 31 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/PhaseOrdering/X86/vector-reductions-logical.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reduction-logical.ll
    M llvm/test/Transforms/SLPVectorizer/revec-reduction-logical.ll

  Log Message:
  -----------
  [SLP]Fix same/alternate analysis in split node analysis for compares

getSameOpcode in some cases may consider 2 compares as having same
opcode, even though previously they were considered as alternate. It may
happen, because getSameOpcode looses info about previous instructions
and their states. Need to use isAlternateInstruction function instead
for the correct analysis.

Reviewers: RKSimon, hiraditya

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/133769



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