/// \brief Simulates liveness when stepping forward over an
/// instruction(bundle): Remove killed-uses, add defs. This is the not
/// recommended way, because it depends on accurate kill flags. If possible
- /// use stepBackwards() instead of this function.
+ /// use stepBackward() instead of this function.
/// The clobbers set will be the list of registers either defined or clobbered
/// by a regmask. The operand will identify whether this is a regmask or
/// register operand.
void stepForward(const MachineInstr &MI,
SmallVectorImpl<std::pair<unsigned, const MachineOperand*>> &Clobbers);
- /// \brief Adds all live-in registers of basic block @p MBB.
- void addLiveIns(const MachineBasicBlock *MBB) {
- for (MachineBasicBlock::livein_iterator LI = MBB->livein_begin(),
- LE = MBB->livein_end(); LI != LE; ++LI)
- addReg(*LI);
- }
+ /// \brief Adds all live-in registers of basic block @p MBB; After prologue/
+ /// epilogue insertion \p AddPristines should be set to true to insert the
+ /// pristine registers.
+ void addLiveIns(const MachineBasicBlock *MBB, bool AddPristines = false);
- /// \brief Adds all live-out registers of basic block @p MBB.
- void addLiveOuts(const MachineBasicBlock *MBB) {
- for (MachineBasicBlock::const_succ_iterator SI = MBB->succ_begin(),
- SE = MBB->succ_end(); SI != SE; ++SI)
- addLiveIns(*SI);
- }
+ /// \brief Adds all live-out registers of basic block @p MBB; After prologue/
+ /// epilogue insertion \p AddPristinesAndCSRs should be set to true.
+ void addLiveOuts(const MachineBasicBlock *MBB,
+ bool AddPristinesAndCSRs = false);
typedef SparseSet<unsigned>::const_iterator const_iterator;
const_iterator begin() const { return LiveRegs.begin(); }