+bool LiveRangeEdit::useIsKill(const LiveInterval &LI,
+ const MachineOperand &MO) const {
+ const MachineInstr *MI = MO.getParent();
+ SlotIndex Idx = LIS.getInstructionIndex(MI).getRegSlot();
+ if (LI.Query(Idx).isKill())
+ return true;
+ const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
+ unsigned SubReg = MO.getSubReg();
+ LaneBitmask LaneMask = TRI.getSubRegIndexLaneMask(SubReg);
+ for (const LiveInterval::SubRange &S : LI.subranges()) {
+ if ((S.LaneMask & LaneMask) != 0 && S.Query(Idx).isKill())
+ return true;
+ }
+ return false;
+}
+