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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.
#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
namespace llvm {
class ARMBaseInstrInfo;
class ARMBaseRegisterInfo;
class ARMSubtarget;
class MachineInstr;
/// ARMHazardRecognizer handles special constraints that are not expressed in
/// the scheduling itinerary. This is only used during postRA scheduling. The
/// ARM preRA scheduler uses an unspecialized instance of the
/// ScoreboardHazardRecognizer.
class ARMHazardRecognizer : public ScoreboardHazardRecognizer {
const ARMBaseInstrInfo &TII;
const ARMBaseRegisterInfo &TRI;
const ARMSubtarget &STI;
MachineInstr *LastMI;
unsigned FpMLxStalls;
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) {}
virtual HazardType getHazardType(SUnit *SU, int Stalls);
virtual void Reset();
virtual void EmitInstruction(SUnit *SU);
virtual void AdvanceCycle();
virtual void RecedeCycle();
} // end namespace llvm