979   enum ExtendKind { ZeroExtended, SignExtended, Unknown };  enumerator
1136     ExtendKindMap[OrigPhi] = WI.IsSigned ? SignExtended : ZeroExtended;  in WidenIV()
1189   bool IsSigned = getExtendKind(NarrowDef) == SignExtended;  in cloneBitwiseIVUser()
1254   bool SignExtend = getExtendKind(NarrowDef) == SignExtended;  in cloneArithmeticIVUser()
1326   if (ExtKind == SignExtended && OBO->hasNoSignedWrap())  in getExtendedOperandRecurrence()
1378       ExtKind = SignExtended;  in getWideRecurrence()
1383   } else if (getExtendKind(DU.NarrowDef) == SignExtended) {  in getWideRecurrence()
1385     ExtKind = SignExtended;  in getWideRecurrence()
1432   bool IsSigned = getExtendKind(DU.NarrowDef) == SignExtended;  in widenLoopCompare()
1497   bool CanSignExtend = ExtKind == SignExtended && OBO->hasNoSignedWrap();  in widenWithVariantUse()
1530       if (ExtKind == SignExtended && ICmpInst::isUnsigned(Pred))  in widenWithVariantUse()
1535     if (ExtKind == SignExtended)  in widenWithVariantUse()
1573     AnotherOpExtKind = SignExtended;  in widenWithVariantUse()
1687     return DU.NeverNegative || getExtendKind(DU.NarrowDef) == SignExtended;  in widenIVUse()
1837   const SCEV *WideIVExpr = getExtendKind(OrigPhi) == SignExtended  in createWideIV()