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//==- llvm/CodeGen/ScheduleDAGInstrs.h - MachineInstr Scheduling -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the ScheduleDAGInstrs class, which implements
// scheduling for a MachineInstr-based dependency graph.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
#define LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
#include "llvm/CodeGen/ScheduleDAG.h"
namespace llvm {
struct SUnit;
class MachineConstantPool;
class MachineFunction;
class MachineModuleInfo;
class MachineRegisterInfo;
class MachineInstr;
class TargetRegisterInfo;
class ScheduleDAG;
class SelectionDAG;
class SelectionDAGISel;
class TargetInstrInfo;
class TargetInstrDesc;
class TargetLowering;
class TargetMachine;
class TargetRegisterClass;
class ScheduleDAGInstrs : public ScheduleDAG {
public:
ScheduleDAGInstrs(MachineBasicBlock *bb,
const TargetMachine &tm);
virtual ~ScheduleDAGInstrs() {}
/// NewSUnit - Creates a new SUnit and return a ptr to it.
///
SUnit *NewSUnit(MachineInstr *MI) {
SUnits.push_back(SUnit(MI, (unsigned)SUnits.size()));
SUnits.back().OrigNode = &SUnits.back();
return &SUnits.back();
}
/// BuildSchedUnits - Build SUnits from the MachineBasicBlock that we are
/// input.
virtual void BuildSchedUnits();
/// ComputeLatency - Compute node latency.
///
virtual void ComputeLatency(SUnit *SU);
virtual MachineBasicBlock *EmitSchedule();
/// Schedule - Order nodes according to selected style, filling
/// in the Sequence member.
///
virtual void Schedule() = 0;
virtual void dumpNode(const SUnit *SU) const;
virtual std::string getGraphNodeLabel(const SUnit *SU) const;
};
}
#endif
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