+MachineBasicBlock *
+SystemZTargetLowering::emitLoadAndTestCmp0(MachineInstr *MI,
+ MachineBasicBlock *MBB,
+ unsigned Opcode) const {
+ MachineFunction &MF = *MBB->getParent();
+ MachineRegisterInfo *MRI = &MF.getRegInfo();
+ const SystemZInstrInfo *TII =
+ static_cast<const SystemZInstrInfo *>(Subtarget.getInstrInfo());
+ DebugLoc DL = MI->getDebugLoc();
+
+ unsigned SrcReg = MI->getOperand(0).getReg();
+
+ // Create new virtual register of the same class as source.
+ const TargetRegisterClass *RC = MRI->getRegClass(SrcReg);
+ unsigned DstReg = MRI->createVirtualRegister(RC);
+
+ // Replace pseudo with a normal load-and-test that models the def as
+ // well.
+ BuildMI(*MBB, MI, DL, TII->get(Opcode), DstReg)
+ .addReg(SrcReg);
+ MI->eraseFromParent();
+
+ return MBB;
+}
+