[all-commits] [llvm/llvm-project] 079746: [SLP]Better cost estimation for masked gather or "...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 079746d2c0804ddf616766eb525270d9c57ab542
      https://github.com/llvm/llvm-project/commit/079746d2c0804ddf616766eb525270d9c57ab542
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-08-30 (Fri, 30 Aug 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/pr47629-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr47629.ll
    M llvm/test/Transforms/SLPVectorizer/X86/remark-masked-loads-consecutive-loads-same-ptr.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reorder-possible-strided-node.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reorder-reused-masked-gather2.ll

  Log Message:
  -----------
  [SLP]Better cost estimation for masked gather or "clustered" loads.

After landing support for actual vectorization of the "clustered" loads,
need better estimate the cost between the masked gather and clustered loads.
This includes estimation of the address calculation and better
estimation of the gathered loads. Also, this estimation now relies on
SLPCostThreshold option, allowing modify the behavior of the compiler.

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/105858



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