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Add VectorTargetTransform::getNumberOfParts.
As discussed on IRC, add VectorTargetTransform::getNumberOfParts to provide a stable interface to the vector legalization splitting factor. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166751 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -68,6 +68,8 @@ public:
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virtual unsigned getMemoryOpCost(unsigned Opcode, Type *Src,
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unsigned Alignment,
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unsigned AddressSpace) const;
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virtual unsigned getNumberOfParts(Type *Tp) const;
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};
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} // end llvm namespace
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@ -156,6 +156,11 @@ public:
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return 1;
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}
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/// Returns the number of pieces into which the provided type must be
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/// split during legalization. Zero is returned when the answer is unknown.
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virtual unsigned getNumberOfParts(Type *Tp) const {
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return 0;
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}
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};
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} // End llvm namespace
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@ -196,3 +196,11 @@ VectorTargetTransformImpl::getMemoryOpCost(unsigned Opcode, Type *Src,
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// Assume that all loads of legal types cost 1.
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return LT.first;
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}
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unsigned
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VectorTargetTransformImpl::getNumberOfParts(Type *Tp) const {
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std::pair<unsigned, EVT> LT =
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getTypeLegalizationCost(Tp->getContext(), TLI->getValueType(Tp));
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return LT.first;
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}
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