MO.setIsUndef(true);
} else if (!MO.isDead()) {
assert(MO.isDef());
- // Things get tricky when we ran out of lane mask bits and
- // merged multiple lanes into the overflow bit: In this case
- // our subregister liveness tracking isn't precise and we can't
- // know what subregister parts are undefined, fall back to the
- // implicit super-register def then.
- LaneBitmask LaneMask = TRI->getSubRegIndexLaneMask(SubReg);
- if (TargetRegisterInfo::isImpreciseLaneMask(LaneMask))
- SuperDefs.push_back(PhysReg);
}
}