forked from OSchip/llvm-project
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines hazard recognizers for scheduling ARM functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ARMHAZARDRECOGNIZER_H
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#define ARMHAZARDRECOGNIZER_H
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#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
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namespace llvm {
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class ARMBaseInstrInfo;
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class ARMBaseRegisterInfo;
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class ARMSubtarget;
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class MachineInstr;
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/// ARMHazardRecognizer handles special constraints that are not expressed in
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/// the scheduling itinerary. This is only used during postRA scheduling. The
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/// ARM preRA scheduler uses an unspecialized instance of the
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/// ScoreboardHazardRecognizer.
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class ARMHazardRecognizer : public ScoreboardHazardRecognizer {
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MachineInstr *LastMI;
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unsigned FpMLxStalls;
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public:
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ARMHazardRecognizer(const InstrItineraryData *ItinData,
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const ScheduleDAG *DAG)
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: ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"),
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LastMI(nullptr) {}
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HazardType getHazardType(SUnit *SU, int Stalls) override;
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void Reset() override;
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void EmitInstruction(SUnit *SU) override;
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void AdvanceCycle() override;
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void RecedeCycle() override;
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};
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} // end namespace llvm
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#endif // ARMHAZARDRECOGNIZER_H
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