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 <array> 22 #include <initializer_list> 23 24 namespace llvm { 25 26 class DataLayout; 27 class MachineFunction; 28 class MachineInstr; 29 class ScheduleDAG; 30 31 // Hazards related to FP MLx instructions 32 class ARMHazardRecognizerFPMLx : public ScheduleHazardRecognizer { 33 MachineInstr *LastMI = nullptr; 34 unsigned FpMLxStalls = 0; 35 36 public: 37 ARMHazardRecognizerFPMLx() : ScheduleHazardRecognizer() { MaxLookAhead = 1; } 38 39 HazardType getHazardType(SUnit *SU, int Stalls) override; 40 void Reset() override; 41 void EmitInstruction(SUnit *SU) override; 42 void AdvanceCycle() override; 43 void RecedeCycle() override; 44 }; 45 46 // Hazards related to bank conflicts 47 class ARMBankConflictHazardRecognizer : public ScheduleHazardRecognizer { 48 SmallVector<MachineInstr *, 8> Accesses; 49 const MachineFunction &MF; 50 const DataLayout &DL; 51 int64_t DataMask; 52 bool AssumeITCMBankConflict; 53 54 public: 55 ARMBankConflictHazardRecognizer(const ScheduleDAG *DAG, int64_t DDM, 56 bool ABC); 57 HazardType getHazardType(SUnit *SU, int Stalls) override; 58 void Reset() override; 59 void EmitInstruction(SUnit *SU) override; 60 void AdvanceCycle() override; 61 void RecedeCycle() override; 62 63 private: 64 inline HazardType CheckOffsets(unsigned O0, unsigned O1); 65 }; 66 67 } // end namespace llvm 68 69 #endif 70