439   Register UndefReg = 0;  in applyCombineShuffleConcat()  local
443       if (UndefReg == 0)  in applyCombineShuffleConcat()
444         UndefReg = Builder.buildUndef(SrcTy).getReg(0);  in applyCombineShuffleConcat()
445       Reg = UndefReg;  in applyCombineShuffleConcat()
524   Register UndefReg;  in matchCombineShuffleVector()  local
528       if (!UndefReg) {  in matchCombineShuffleVector()
530         UndefReg = Builder.buildUndef(SrcType).getReg(0);  in matchCombineShuffleVector()
532       Ops.push_back(UndefReg);  in matchCombineShuffleVector()
3080   Register UndefReg;  in applyCombineInsertVecElts()  local
3082     if (UndefReg)  in applyCombineInsertVecElts()
3083       return UndefReg;  in applyCombineInsertVecElts()
3085     UndefReg = Builder.buildUndef(DstTy.getScalarType()).getReg(0);  in applyCombineInsertVecElts()
3086     return UndefReg;  in applyCombineInsertVecElts()