[PATCH] D148036: [SLP]Improve reduction cost model for scalars.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, vdmitrie.
Herald added subscribers: vporpo, hiraditya.
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ABataev requested review of this revision.
Herald added a subscriber: pcwang-thead.
Herald added a project: LLVM.

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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D148036

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll
  llvm/test/Transforms/SLPVectorizer/X86/horizontal-smax.ll

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