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[LoongArch] Custom implement getShuffleCost #157983

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[LoongArch] Custom implement getShuffleCost #157983

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18 changes: 18 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchTargetTransformInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -111,4 +111,22 @@ bool LoongArchTTIImpl::shouldExpandReduction(const IntrinsicInst *II) const {
}
}

InstructionCost LoongArchTTIImpl::getShuffleCost(
TTI::ShuffleKind Kind, VectorType *DstTy, VectorType *SrcTy,
ArrayRef<int> Mask, TTI::TargetCostKind CostKind, int Index,
VectorType *SubTp, ArrayRef<const Value *> Args,
const Instruction *CxtI) const {

Kind = improveShuffleKindFromMask(Kind, Mask, SrcTy, Index, SubTp);
switch (Kind) {
default:
return BaseT::getShuffleCost(Kind, DstTy, SrcTy, Mask, CostKind, Index,
SubTp, Args, CxtI);
// case TTI::SK_Broadcast:
// case TTI::SK_Reverse:
case TTI::SK_Transpose:
return 1;
}
}

// TODO: Implement more hooks to provide TTI machinery for LoongArch.
5 changes: 5 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchTargetTransformInfo.h
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Expand Up @@ -54,6 +54,11 @@ class LoongArchTTIImpl : public BasicTTIImplBase<LoongArchTTIImpl> {
bool enableWritePrefetching() const override;

bool shouldExpandReduction(const IntrinsicInst *II) const override;
InstructionCost
getShuffleCost(TTI::ShuffleKind Kind, VectorType *DstTy, VectorType *SrcTy,
ArrayRef<int> Mask, TTI::TargetCostKind CostKind, int Index,
VectorType *SubTp, ArrayRef<const Value *> Args = {},
const Instruction *CxtI = nullptr) const override;

// TODO: Implement more hooks to provide TTI machinery for LoongArch.
};
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