1076   enum class ExtendKind { Zero, Sign, Unknown };  enumerator
1235     ExtendKindMap[OrigPhi] = WI.IsSigned ? ExtendKind::Sign : ExtendKind::Zero;  in WidenIV()
1288   bool IsSigned = getExtendKind(NarrowDef) == ExtendKind::Sign;  in cloneBitwiseIVUser()
1353   bool SignExtend = getExtendKind(NarrowDef) == ExtendKind::Sign;  in cloneArithmeticIVUser()
1493   if (!(ExtKind == ExtendKind::Sign && Op->IsNSW) &&  in getExtendedOperandRecurrence()
1503         ExtKind = ExtendKind::Sign;  in getExtendedOperandRecurrence()
1511   if (ExtKind == ExtendKind::Sign)  in getExtendedOperandRecurrence()
1561       ExtKind = ExtendKind::Sign;  in getWideRecurrence()
1566   } else if (getExtendKind(DU.NarrowDef) == ExtendKind::Sign) {  in getWideRecurrence()
1568     ExtKind = ExtendKind::Sign;  in getWideRecurrence()
1592                           DU.NeverNegative || ExtKind == ExtendKind::Sign);  in truncateIVUse()
1618   bool IsSigned = getExtendKind(DU.NarrowDef) == ExtendKind::Sign;  in widenLoopCompare()
1679   bool CanSignExtend = ExtKind == ExtendKind::Sign && OBO->hasNoSignedWrap();  in widenWithVariantUse()
1712       if (ExtKind == ExtendKind::Sign && ICmpInst::isUnsigned(Pred))  in widenWithVariantUse()
1717     if (ExtKind == ExtendKind::Sign)  in widenWithVariantUse()
1755     AnotherOpExtKind = ExtendKind::Sign;  in widenWithVariantUse()
1771                              AnotherOpExtKind == ExtendKind::Sign, NarrowUse);  in widenWithVariantUse()
1776                              AnotherOpExtKind == ExtendKind::Sign, NarrowUse);  in widenWithVariantUse()
1844       DU.NeverNegative || getExtendKind(DU.NarrowDef) == ExtendKind::Sign;  in widenIVUse()
2040   const SCEV *WideIVExpr = getExtendKind(OrigPhi) == ExtendKind::Sign  in createWideIV()