[all-commits] [llvm/llvm-project] b28f40: [SLP]Improve reduction cost model for scalars.

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b28f407df9d0f63ca85cfaeddf9effc024c071d8
      https://github.com/llvm/llvm-project/commit/b28f407df9d0f63ca85cfaeddf9effc024c071d8
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2023-04-12 (Wed, 12 Apr 2023)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll
    M llvm/test/Transforms/SLPVectorizer/X86/horizontal-smax.ll

  Log Message:
  -----------
  [SLP]Improve reduction cost model for scalars.

Instead of abstract cost of the scalar reduction ops, try to use the
cost of actual reduction operation instructions, where possible. Also,
remove the estimation of the vectorized GEPs pointers for reduced loads,
since it is already handled in the tree.

Differential Revision: https://reviews.llvm.org/D148036