2888   enum { Unset = -1 };  enumerator
2961         if (A->Provenance[BitIdx] != BitPart::Unset &&  in collectBitParts()
2962             B->Provenance[BitIdx] != BitPart::Unset &&  in collectBitParts()
2966         if (A->Provenance[BitIdx] == BitPart::Unset)  in collectBitParts()
2997         P.insert(P.begin(), BitShift.getZExtValue(), BitPart::Unset);  in collectBitParts()
3000         P.insert(P.end(), BitShift.getZExtValue(), BitPart::Unset);  in collectBitParts()
3026           Result->Provenance[BitIdx] = BitPart::Unset;  in collectBitParts()
3042         Result->Provenance[BitIdx] = BitPart::Unset;  in collectBitParts()
3179                 [](int8_t I) { return I == BitPart::Unset || 0 <= I; }) &&  in recognizeBSwapOrBitReverseIdiom()
3184   if (BitProvenance.back() == BitPart::Unset) {  in recognizeBSwapOrBitReverseIdiom()
3185     while (!BitProvenance.empty() && BitProvenance.back() == BitPart::Unset)  in recognizeBSwapOrBitReverseIdiom()
3206     if (BitProvenance[BitIdx] == BitPart::Unset) {  in recognizeBSwapOrBitReverseIdiom()