71     Register TruncSrc;  in tryCombineAnyExt()  local
72     if (mi_match(SrcReg, MRI, m_GTrunc(m_Reg(TruncSrc)))) {  in tryCombineAnyExt()
74       if (MRI.getType(DstReg) == MRI.getType(TruncSrc))  in tryCombineAnyExt()
75         replaceRegOrBuildCopy(DstReg, TruncSrc, MRI, Builder, UpdatedDefs,  in tryCombineAnyExt()
78         Builder.buildAnyExtOrTrunc(DstReg, TruncSrc);  in tryCombineAnyExt()
131     Register TruncSrc;  in tryCombineZExt()  local
133     if (mi_match(SrcReg, MRI, m_GTrunc(m_Reg(TruncSrc))) ||  in tryCombineZExt()
144       if (TruncSrc && (DstTy != MRI.getType(TruncSrc)))  in tryCombineZExt()
145         TruncSrc = Builder.buildAnyExtOrTrunc(DstTy, TruncSrc).getReg(0);  in tryCombineZExt()
147       Register AndSrc = SextSrc ? SextSrc : TruncSrc;  in tryCombineZExt()
205     Register TruncSrc;  in tryCombineSExt()  local
206     if (mi_match(SrcReg, MRI, m_GTrunc(m_Reg(TruncSrc)))) {  in tryCombineSExt()
213       if (DstTy != MRI.getType(TruncSrc))  in tryCombineSExt()
214         TruncSrc = Builder.buildAnyExtOrTrunc(DstTy, TruncSrc).getReg(0);  in tryCombineSExt()
217       if (KB && KB->computeNumSignBits(TruncSrc) >  in tryCombineSExt()
219         replaceRegOrBuildCopy(DstReg, TruncSrc, MRI, Builder, UpdatedDefs,  in tryCombineSExt()
222         Builder.buildSExtInReg(DstReg, TruncSrc, SizeInBits);  in tryCombineSExt()
343     Register TruncSrc;  in tryCombineTrunc()  local
344     if (mi_match(SrcReg, MRI, m_GTrunc(m_Reg(TruncSrc)))) {  in tryCombineTrunc()
350       Builder.buildTrunc(DstReg, TruncSrc);  in tryCombineTrunc()
352       markInstAndDefDead(MI, *MRI.getVRegDef(TruncSrc), DeadInsts);  in tryCombineTrunc()