[all-commits] [llvm/llvm-project] d63270: [AArch64] Use PerfectShuffle costs in AArch64TTIIm...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d6327050e00f590fe47fb46fdb2399ef69814a31
      https://github.com/llvm/llvm-project/commit/d6327050e00f590fe47fb46fdb2399ef69814a31
  Author: David Green <david.green at arm.com>
  Date:   2022-04-27 (Wed, 27 Apr 2022)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64PerfectShuffle.h
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/AArch64/shuffle-other.ll
    M llvm/test/Analysis/CostModel/AArch64/shuffle-select.ll
    M llvm/test/Transforms/PhaseOrdering/AArch64/matrix-extract-insert.ll

  Log Message:
  -----------
  [AArch64] Use PerfectShuffle costs in AArch64TTIImpl::getShuffleCost

Given a shuffle with 4 elements size 16 or 32, we can use the costs
directly from the PerfectShuffle tables to get a slightly more accurate
cost for the resulting shuffle.

Differential Revision: https://reviews.llvm.org/D123409