[all-commits] [llvm/llvm-project] 6b85fb: [SLP]Consider (f)sub, being operand of llvm.(f)abs...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b85fb1ef8586181fbdb02ca11a3bb0e9006aabd
      https://github.com/llvm/llvm-project/commit/6b85fb1ef8586181fbdb02ca11a3bb0e9006aabd
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-04-11 (Thu, 11 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/store-abs-minbitwidth.ll

  Log Message:
  -----------
  [SLP]Consider (f)sub, being operand of llvm.(f)abs/icmp eq/ne 0, commutative.

If (f)sub is only operand of llvm.(f)abs or icmp eq/ne 0 (int only), we can consider it as commutative operation, just need to drop wrapping flags for ineteger
operation.

https://alive2.llvm.org/ce/z/GxvxjB for correctness of abs with dropped
flags.

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/86196



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