Differential D87867 Diff 292647 llvm/include/llvm/CodeGen/MachineScheduler.h

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/// Tell the strategy that MBB is about to be processed.		/// Tell the strategy that MBB is about to be processed.
virtual void enterMBB(MachineBasicBlock *MBB) {};		virtual void enterMBB(MachineBasicBlock *MBB) {};

/// Tell the strategy that current MBB is done.		/// Tell the strategy that current MBB is done.
virtual void leaveMBB() {};		virtual void leaveMBB() {};

/// Notify this strategy that all roots have been released (including those		/// Notify this strategy that all roots have been released (including those
/// that depend on EntrySU or ExitSU).		/// that depend on ExitSU).
virtual void registerRoots() {}		virtual void registerRoots() {}

/// Pick the next node to schedule, or return NULL. Set IsTopNode to true to		/// Pick the next node to schedule, or return NULL. Set IsTopNode to true to
/// schedule the node at the top of the unscheduled region. Otherwise it will		/// schedule the node at the top of the unscheduled region. Otherwise it will
/// be scheduled at the bottom.		/// be scheduled at the bottom.
virtual SUnit *pickNode(bool &IsTopNode) = 0;		virtual SUnit *pickNode(bool &IsTopNode) = 0;

/// Scheduler callback to notify that a new subtree is scheduled.		/// Scheduler callback to notify that a new subtree is scheduled.
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