1 //===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines hazard recognizers for scheduling ARM functions. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef ARMHAZARDRECOGNIZER_H 15 #define ARMHAZARDRECOGNIZER_H 16 17 #include "llvm/CodeGen/ScoreboardHazardRecognizer.h" 18 19 namespace llvm { 20 21 class ARMBaseInstrInfo; 22 class ARMBaseRegisterInfo; 23 class ARMSubtarget; 24 class MachineInstr; 25 26 class ARMHazardRecognizer : public ScoreboardHazardRecognizer { 27 const ARMBaseInstrInfo &TII; 28 const ARMBaseRegisterInfo &TRI; 29 const ARMSubtarget &STI; 30 31 MachineInstr *LastMI; 32 unsigned FpMLxStalls; 33 unsigned ITBlockSize; // No. of MIs in current IT block yet to be scheduled. 34 MachineInstr *ITBlockMIs[4]; 35 36 public: 37 ARMHazardRecognizer(const InstrItineraryData *ItinData, 38 const ARMBaseInstrInfo &tii, 39 const ARMBaseRegisterInfo &tri, 40 const ARMSubtarget &sti, 41 const ScheduleDAG *DAG) : 42 ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"), TII(tii), 43 TRI(tri), STI(sti), LastMI(0), ITBlockSize(0) {} 44 45 virtual HazardType getHazardType(SUnit *SU, int Stalls); 46 virtual void Reset(); 47 virtual void EmitInstruction(SUnit *SU); 48 virtual void AdvanceCycle(); 49 virtual void RecedeCycle(); 50 }; 51 52 } // end namespace llvm 53 54 #endif // ARMHAZARDRECOGNIZER_H 55
