unsigned getRegisterBitWidth(bool Vector) const override;
unsigned getMaximumUnrollFactor() const override;
unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty, OperandValueKind,
- OperandValueKind) const override;
+ OperandValueKind, OperandValueProperties,
+ OperandValueProperties) const override;
unsigned getShuffleCost(ShuffleKind Kind, Type *Tp,
int Index, Type *SubTp) const override;
unsigned getCastInstrCost(unsigned Opcode, Type *Dst,
return 2;
}
-unsigned X86TTI::getArithmeticInstrCost(unsigned Opcode, Type *Ty,
- OperandValueKind Op1Info,
- OperandValueKind Op2Info) const {
+unsigned X86TTI::getArithmeticInstrCost(
+ unsigned Opcode, Type *Ty, OperandValueKind Op1Info,
+ OperandValueKind Op2Info, OperandValueProperties Opd1PropInfo,
+ OperandValueProperties Opd2PropInfo) const {
// Legalize the type.
std::pair<unsigned, MVT> LT = TLI->getTypeLegalizationCost(Ty);
int ISD = TLI->InstructionOpcodeToISD(Opcode);
assert(ISD && "Invalid opcode");
+ if (ISD == ISD::SDIV &&
+ Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
+ Opd2PropInfo == TargetTransformInfo::OP_PowerOf2) {
+ // On X86, vector signed division by constants power-of-two are
+ // normally expanded to the sequence SRA + SRL + ADD + SRA.
+ // The OperandValue properties many not be same as that of previous
+ // operation;conservatively assume OP_None.
+ unsigned Cost =
+ 2 * getArithmeticInstrCost(Instruction::AShr, Ty, Op1Info, Op2Info,
+ TargetTransformInfo::OP_None,
+ TargetTransformInfo::OP_None);
+ Cost += getArithmeticInstrCost(Instruction::LShr, Ty, Op1Info, Op2Info,
+ TargetTransformInfo::OP_None,
+ TargetTransformInfo::OP_None);
+ Cost += getArithmeticInstrCost(Instruction::Add, Ty, Op1Info, Op2Info,
+ TargetTransformInfo::OP_None,
+ TargetTransformInfo::OP_None);
+
+ return Cost;
+ }
+
static const CostTblEntry<MVT::SimpleValueType>
AVX2UniformConstCostTable[] = {
{ ISD::SDIV, MVT::v16i16, 6 }, // vpmulhw sequence