//===- PPCMachineScheduler.h - Custom PowerPC MI scheduler --*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// Custom PowerPC MI scheduler.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H

#define LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H

#include "llvm/CodeGen/MachineScheduler.h"

namespace llvm {

/// A MachineSchedStrategy implementation for PowerPC pre RA scheduling.

class PPCPreRASchedStrategy : public GenericScheduler {

public:

  PPCPreRASchedStrategy(const MachineSchedContext *C) :

    GenericScheduler(C) {}

protected:

  bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand,

                    SchedBoundary *Zone) const override;

private:

  bool biasAddiLoadCandidate(SchedCandidate &Cand,

                             SchedCandidate &TryCand,

                             SchedBoundary &Zone) const;

};

/// A MachineSchedStrategy implementation for PowerPC post RA scheduling.

class PPCPostRASchedStrategy : public PostGenericScheduler {

public:

  PPCPostRASchedStrategy(const MachineSchedContext *C) :

    PostGenericScheduler(C) {}

protected:

  void initialize(ScheduleDAGMI *Dag) override;

  SUnit *pickNode(bool &IsTopNode) override;

  void enterMBB(MachineBasicBlock *MBB) override;

  void leaveMBB() override;

  bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) override;

  bool biasAddiCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) const;

};

} // end namespace llvm

#endif // LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H