366     MachineInstr *SaveExecInst = nullptr;  in runOnMachineFunction()  local
372       if (SaveExecInst && J->readsRegister(Exec, TRI)) {  in runOnMachineFunction()
376         SaveExecInst = nullptr;  in runOnMachineFunction()
383         if (SaveExecInst) {  in runOnMachineFunction()
386           SaveExecInst = nullptr;  in runOnMachineFunction()
395           SaveExecInst = &*J;  in runOnMachineFunction()
396           LLVM_DEBUG(dbgs() << "Found save exec op: " << *SaveExecInst << '\n');  in runOnMachineFunction()
403       } else if (ReadsCopyFromExec && !SaveExecInst) {  in runOnMachineFunction()
417       if (SaveExecInst && J->readsRegister(CopyToExec, TRI)) {  in runOnMachineFunction()
418         assert(SaveExecInst != &*J);  in runOnMachineFunction()
423     if (!SaveExecInst)  in runOnMachineFunction()
426     LLVM_DEBUG(dbgs() << "Insert save exec op: " << *SaveExecInst << '\n');  in runOnMachineFunction()
428     MachineOperand &Src0 = SaveExecInst->getOperand(1);  in runOnMachineFunction()
429     MachineOperand &Src1 = SaveExecInst->getOperand(2);  in runOnMachineFunction()
436       if (!SaveExecInst->isCommutable())  in runOnMachineFunction()
445     auto InsPt = SaveExecInst->getIterator();  in runOnMachineFunction()
446     const DebugLoc &DL = SaveExecInst->getDebugLoc();  in runOnMachineFunction()
448     BuildMI(MBB, InsPt, DL, TII->get(getSaveExecOp(SaveExecInst->getOpcode())),  in runOnMachineFunction()
451     SaveExecInst->eraseFromParent();  in runOnMachineFunction()