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//===-- R600MachineScheduler.h - R600 Scheduler Interface -*- C++ -*-------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \file
/// \brief R600 Machine Scheduler interface
//
//===----------------------------------------------------------------------===//
#ifndef R600MACHINESCHEDULER_H_
#define R600MACHINESCHEDULER_H_
#include "R600InstrInfo.h"
#include "llvm/ADT/PriorityQueue.h"
#include "llvm/CodeGen/MachineScheduler.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
namespace llvm {
class R600SchedStrategy : public MachineSchedStrategy {
const ScheduleDAGMI *DAG;
const R600InstrInfo *TII;
const R600RegisterInfo *TRI;
MachineRegisterInfo *MRI;
enum InstKind {
IDAlu,
IDFetch,
IDOther,
IDLast
};
enum AluKind {
AluAny,
AluT_X,
AluT_Y,
AluT_Z,
AluT_W,
AluT_XYZW,
AluPredX,
AluDiscarded, // LLVM Instructions that are going to be eliminated
AluLast
};
std::vector<SUnit *> Available[IDLast], Pending[IDLast];
std::vector<SUnit *> AvailableAlus[AluLast];
std::vector<SUnit *> UnscheduledARDefs;
std::vector<SUnit *> UnscheduledARUses;
std::vector<SUnit *> PhysicalRegCopy;
InstKind CurInstKind;
int CurEmitted;
InstKind NextInstKind;
unsigned AluInstCount;
unsigned FetchInstCount;
int InstKindLimit[IDLast];
int OccupedSlotsMask;
public:
R600SchedStrategy() :
DAG(0), TII(0), TRI(0), MRI(0) {
}
virtual ~R600SchedStrategy() {
}
virtual void initialize(ScheduleDAGMI *dag);
virtual SUnit *pickNode(bool &IsTopNode);
virtual void schedNode(SUnit *SU, bool IsTopNode);
virtual void releaseTopNode(SUnit *SU);
virtual void releaseBottomNode(SUnit *SU);
private:
std::vector<MachineInstr *> InstructionsGroupCandidate;
int getInstKind(SUnit *SU);
bool regBelongsToClass(unsigned Reg, const TargetRegisterClass *RC) const;
AluKind getAluKind(SUnit *SU) const;
void LoadAlu();
unsigned AvailablesAluCount() const;
SUnit *AttemptFillSlot (unsigned Slot);
void PrepareNextSlot();
SUnit *PopInst(std::vector<SUnit*> &Q);
void AssignSlot(MachineInstr *MI, unsigned Slot);
SUnit* pickAlu();
SUnit* pickOther(int QID);
void MoveUnits(std::vector<SUnit *> &QSrc, std::vector<SUnit *> &QDst);
};
} // namespace llvm
#endif /* R600MACHINESCHEDULER_H_ */
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