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//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// 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 {
MachineInstr *LastMI;
unsigned FpMLxStalls;
ARMHazardRecognizer(const InstrItineraryData *ItinData,
const ScheduleDAG *DAG)
: ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"),
LastMI(nullptr) {}
HazardType getHazardType(SUnit *SU, int Stalls) override;
void Reset() override;
void EmitInstruction(SUnit *SU) override;
void AdvanceCycle() override;
void RecedeCycle() override;
} // end namespace llvm