- /// handleRegisterDef - update intervals for a register def
- /// (calls handleVirtualRegisterDef)
- void handleRegisterDef(MachineBasicBlock *MBB,
- MachineBasicBlock::iterator MI,
- SlotIndex MIIdx,
- MachineOperand& MO, unsigned MOIdx);
-
- /// isPartialRedef - Return true if the specified def at the specific index
- /// is partially re-defining the specified live interval. A common case of
- /// this is a definition of the sub-register.
- bool isPartialRedef(SlotIndex MIIdx, MachineOperand &MO,
- LiveInterval &interval);
-
- /// handleVirtualRegisterDef - update intervals for a virtual
- /// register def
- void handleVirtualRegisterDef(MachineBasicBlock *MBB,
- MachineBasicBlock::iterator MI,
- SlotIndex MIIdx, MachineOperand& MO,
- unsigned MOIdx,
- LiveInterval& interval);
+ /// Walk the values in @p LI and check for dead values:
+ /// - Dead PHIDef values are marked as unused.
+ /// - Dead operands are marked as such.
+ /// - Completely dead machine instructions are added to the @p dead vector
+ /// if it is not nullptr.
+ /// Returns true if any PHI value numbers have been removed which may
+ /// have separated the interval into multiple connected components.
+ bool computeDeadValues(LiveInterval &LI,
+ SmallVectorImpl<MachineInstr*> *dead);