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 "ARMBaseInstrInfo.h" 17 #include "llvm/ADT/BitmaskEnum.h" 18 #include "llvm/ADT/SmallVector.h" 19 #include "llvm/CodeGen/ScheduleHazardRecognizer.h" 20 #include "llvm/Support/DataTypes.h" 21 #include <initializer_list> 22 23 namespace llvm { 24 25 class DataLayout; 26 class MachineFunction; 27 class MachineInstr; 28 class ScheduleDAG; 29 30 // Hazards related to FP MLx instructions 31 class ARMHazardRecognizerFPMLx : public ScheduleHazardRecognizer { 32 MachineInstr *LastMI = nullptr; 33 unsigned FpMLxStalls = 0; 34 35 public: 36 ARMHazardRecognizerFPMLx() { MaxLookAhead = 1; } 37 38 HazardType getHazardType(SUnit *SU, int Stalls) override; 39 void Reset() override; 40 void EmitInstruction(SUnit *SU) override; 41 void AdvanceCycle() override; 42 void RecedeCycle() override; 43 }; 44 45 // Hazards related to bank conflicts 46 class ARMBankConflictHazardRecognizer : public ScheduleHazardRecognizer { 47 SmallVector<MachineInstr *, 8> Accesses; 48 const MachineFunction &MF; 49 const DataLayout &DL; 50 int64_t DataMask; 51 bool AssumeITCMBankConflict; 52 53 public: 54 ARMBankConflictHazardRecognizer(const ScheduleDAG *DAG, int64_t DDM, 55 bool ABC); 56 HazardType getHazardType(SUnit *SU, int Stalls) override; 57 void Reset() override; 58 void EmitInstruction(SUnit *SU) override; 59 void AdvanceCycle() override; 60 void RecedeCycle() override; 61 62 private: 63 inline HazardType CheckOffsets(unsigned O0, unsigned O1); 64 }; 65 66 } // end namespace llvm 67 68 #endif 69