[all-commits] [llvm/llvm-project] 3a30d8: [SLP]Check if masked gather can be emitted as a se...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3a30d8e9e59c152caec7abc5cf5437b21cac428e
      https://github.com/llvm/llvm-project/commit/3a30d8e9e59c152caec7abc5cf5437b21cac428e
  Author: Alexey Bataev <5361294+alexey-bataev at users.noreply.github.com>
  Date:   2024-03-01 (Fri, 01 Mar 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/scatter-vectorize-reused-pointer.ll

  Log Message:
  -----------
  [SLP]Check if masked gather can be emitted as a serie of loads/insert subvector.

Masked gather is very expensive operation and sometimes better to
represent it as a serie of consecutive/strided loads + insertsubvectors
sequences. Patch adds some basic estimation and if loads+insertsubvector
is cheaper, decides to represent it in this way rather than masked
gather.

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/83481



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