// the instruction.
for (unsigned i = 0, e = OldMI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = OldMI->getOperand(i);
- if (MO.isRegister() && MO.isDef() && MO.getReg() &&
+ if (MO.isRegister() && MO.getReg() &&
MRegisterInfo::isVirtualRegister(MO.getReg())) {
unsigned Reg = MO.getReg();
VarInfo &VI = getVarInfo(Reg);
- if (VI.DefInst == OldMI)
- VI.DefInst = NewMI;
+ if (MO.isDef()) {
+ // Update the defining instruction.
+ if (VI.DefInst == OldMI)
+ VI.DefInst = NewMI;
+ } else if (MO.isUse()) {
+ // If this is a kill of the value, update the VI kills list.
+ if (VI.removeKill(OldMI))
+ VI.Kills.push_back(NewMI); // Yes, there was a kill of it
+ }
}
}