[all-commits] [llvm/llvm-project] f82eb7: [SLP]Introduce gather cost estimation function.

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f82eb7e066f322a231627383fc80522d98ce6181
      https://github.com/llvm/llvm-project/commit/f82eb7e066f322a231627383fc80522d98ce6181
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2023-04-13 (Thu, 13 Apr 2023)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/extractelements-to-shuffle.ll
    M llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reduced-gathered-vectorized.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reduction-logical.ll

  Log Message:
  -----------
  [SLP]Introduce gather cost estimation function.

Introduced BoUpSLP::ShuffleCostEstimator::gather function as an initial
implementation of the gather/buildvector cost estimation for buildvector
nodes. It will allow to use general codegen infrastructure for better
cost estimation + it improves the cost estimation for the
gathers/buildvectors.

Improved part of D110978.

Differential Revision: https://reviews.llvm.org/D148174