1 //===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines hazard recognizers for scheduling ARM functions. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_ARM_ARMHAZARDRECOGNIZER_H 14 #define LLVM_LIB_TARGET_ARM_ARMHAZARDRECOGNIZER_H 15 16 #include "llvm/CodeGen/ScheduleHazardRecognizer.h" 17 18 namespace llvm { 19 20 // Hazards related to FP MLx instructions 21 class ARMHazardRecognizerFPMLx : public ScheduleHazardRecognizer { 22 MachineInstr *LastMI = nullptr; 23 unsigned FpMLxStalls = 0; 24 25 public: ARMHazardRecognizerFPMLx()26 ARMHazardRecognizerFPMLx() : ScheduleHazardRecognizer() { MaxLookAhead = 1; } 27 28 HazardType getHazardType(SUnit *SU, int Stalls) override; 29 void Reset() override; 30 void EmitInstruction(SUnit *SU) override; 31 void AdvanceCycle() override; 32 void RecedeCycle() override; 33 }; 34 35 } // end namespace llvm 36 37 #endif 38