forked from OSchip/llvm-project
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 LLVM_LIB_TARGET_ARM_ARMHAZARDRECOGNIZER_H
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#define LLVM_LIB_TARGET_ARM_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 = nullptr;
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unsigned FpMLxStalls = 0;
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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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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
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