lib/CodeGen/MachineSink.cpp

283         MachineInstr *UseInst = MO.getParent();
284         unsigned OpNo = UseInst->getOperandNo(&MO);
285         MachineBasicBlock *UseBlock = UseInst->getParent();
286         return UseBlock == MBB && UseInst->isPHI() &&
287                UseInst->getOperand(OpNo + 1).getMBB() == DefMBB;
295     MachineInstr *UseInst = MO.getParent();
296     unsigned OpNo = &MO - &UseInst->getOperand(0);
297     MachineBasicBlock *UseBlock = UseInst->getParent();
298     if (UseInst->isPHI()) {
301       UseBlock = UseInst->getOperand(OpNo+1).getMBB();
580   for (MachineInstr &UseInst : MRI->use_nodbg_instructions(Reg)) {
581     MachineBasicBlock *UseBlock = UseInst.getParent();
582     if (UseBlock == SuccToSinkTo && !UseInst.isPHI())