236   const GExtOp *Second = cast<GExtOp>(&SecondMI);  in matchExtOfExt()  local
239   Register Src = Second->getSrcReg();  in matchExtOfExt()
243   if (!MRI.hasOneNonDBGUse(Second->getReg(0)))  in matchExtOfExt()
247   if (First->getOpcode() == Second->getOpcode() &&  in matchExtOfExt()
248       isLegalOrBeforeLegalizer({Second->getOpcode(), {DstTy, SrcTy}})) {  in matchExtOfExt()
249     if (Second->getOpcode() == TargetOpcode::G_ZEXT) {  in matchExtOfExt()
251       if (Second->getFlag(MachineInstr::MIFlag::NonNeg))  in matchExtOfExt()
258       B.buildInstr(Second->getOpcode(), {Dst}, {Src});  in matchExtOfExt()
266       isLegalOrBeforeLegalizer({Second->getOpcode(), {DstTy, SrcTy}})) {  in matchExtOfExt()
267     if (Second->getOpcode() == TargetOpcode::G_ZEXT) {  in matchExtOfExt()
269       if (Second->getFlag(MachineInstr::MIFlag::NonNeg))  in matchExtOfExt()
280   if (Second->getOpcode() == TargetOpcode::G_ANYEXT &&  in matchExtOfExt()