683     MachineInstr *MovY = &*Iter;  in matchSwap()  local
684     KilledT = MovY->killsRegister(T, TRI);  in matchSwap()
686     if ((MovY->getOpcode() != AMDGPU::V_MOV_B32_e32 &&  in matchSwap()
687          MovY->getOpcode() != AMDGPU::COPY) ||  in matchSwap()
688         !MovY->getOperand(1).isReg()        ||  in matchSwap()
689         MovY->getOperand(1).getReg() != T   ||  in matchSwap()
690         MovY->getOperand(1).getSubReg() != Tsub)  in matchSwap()
693     Register Y = MovY->getOperand(0).getReg();  in matchSwap()
694     unsigned Ysub = MovY->getOperand(0).getSubReg();  in matchSwap()
700     for (auto IY = MovY->getIterator(), I = std::next(MovT.getIterator());  in matchSwap()
733     LLVM_DEBUG(dbgs() << "Matched v_swap_b32:\n" << MovT << *MovX << *MovY);  in matchSwap()
753     dropInstructionKeepingImpDefs(*MovY);  in matchSwap()