AArch64 patchpoint implementation fails to clobber lr

[linzj]

Bugzilla Link	40240
Version	7.0
OS	Linux
CC	@Arnaud-de-Grandmaison-ARM,@kbeyls,@smithp35

Extended Description

casual implementation:
case TargetOpcode::STACKMAP:
case TargetOpcode::PATCHPOINT:
return emitPatchPoint(MI, BB);

should be:
{
MachineBasicBlock* MBB2 = TargetLoweringBase::emitPatchPoint(MI, MBB);
MachineFunction &MF = *MI.getMF();
MI.addOperand(MF, MachineOperand::CreateReg(AArch64::LR, true, true));
return MBB2;
}

[c-rhodes]

marked this as incomplete as there's no reproducer demonstrating this is an issue or context explaining why this is an issue