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//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines hazard recognizers for scheduling ARM functions.
//
//===----------------------------------------------------------------------===//
#ifndef ARMHAZARDRECOGNIZER_H
#define ARMHAZARDRECOGNIZER_H
#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
namespace llvm {
class ARMBaseInstrInfo;
class ARMBaseRegisterInfo;
class ARMSubtarget;
class MachineInstr;
class ARMHazardRecognizer : public ScoreboardHazardRecognizer {
const ARMBaseInstrInfo &TII;
const ARMBaseRegisterInfo &TRI;
const ARMSubtarget &STI;
MachineInstr *LastMI;
unsigned FpMLxStalls;
unsigned ITBlockSize; // No. of MIs in current IT block yet to be scheduled.
MachineInstr *ITBlockMIs[4];
public:
ARMHazardRecognizer(const InstrItineraryData *ItinData,
const ARMBaseInstrInfo &tii,
const ARMBaseRegisterInfo &tri,
const ARMSubtarget &sti,
const ScheduleDAG *DAG) :
ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"), TII(tii),
TRI(tri), STI(sti), LastMI(0), ITBlockSize(0) {}
virtual HazardType getHazardType(SUnit *SU, int Stalls);
virtual void Reset();
virtual void EmitInstruction(SUnit *SU);
virtual void AdvanceCycle();
virtual void RecedeCycle();
};
} // end namespace llvm
#endif // ARMHAZARDRECOGNIZER_H
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