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References

lib/Target/X86/X86ISelLowering.cpp
35867         std::tie(Lo, Hi) = DAG.SplitVector(Match, DL);
35868         Match = DAG.getNode(BinOp, DL, Lo.getValueType(), Lo, Hi);
35872       Movmsk = combineBitcastvxi1(DAG, MovmskVT, Match, DL, Subtarget);
35876     Movmsk = DAG.getZExtOrTrunc(Movmsk, DL, NumElts > 32 ? MVT::i64 : MVT::i32);
35900       std::tie(Lo, Hi) = DAG.SplitVector(Match, DL);
35901       Match = DAG.getNode(BinOp, DL, Lo.getValueType(), Lo, Hi);
35914     Movmsk = getPMOVMSKB(DL, BitcastLogicOp, DAG, Subtarget);
35923     SDValue Mask = DAG.getConstant(1, DL, CmpVT);
35924     SDValue Result = DAG.getNode(ISD::CTPOP, DL, CmpVT, Movmsk);
35925     Result = DAG.getNode(ISD::AND, DL, CmpVT, Result, Mask);
35926     return DAG.getZExtOrTrunc(Result, DL, ExtractVT);
35933     CmpC = DAG.getConstant(0, DL, CmpVT);
35938                            DL, CmpVT);
35946   SDValue Setcc = DAG.getSetCC(DL, SetccVT, Movmsk, CmpC, CondCode);
35947   SDValue Zext = DAG.getZExtOrTrunc(Setcc, DL, ExtractVT);
35948   SDValue Zero = DAG.getConstant(0, DL, ExtractVT);
35949   return DAG.getNode(ISD::SUB, DL, ExtractVT, Zero, Zext);