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 /// ARMHazardRecognizer handles special constraints that are not expressed in 27 /// the scheduling itinerary. This is only used during postRA scheduling. The 28 /// ARM preRA scheduler uses an unspecialized instance of the 29 /// ScoreboardHazardRecognizer. 30 class ARMHazardRecognizer : public ScoreboardHazardRecognizer { 31 const ARMBaseInstrInfo &TII; 32 const ARMBaseRegisterInfo &TRI; 33 const ARMSubtarget &STI; 34 35 MachineInstr *LastMI; 36 unsigned FpMLxStalls; 37 38 public: ARMHazardRecognizer(const InstrItineraryData * ItinData,const ARMBaseInstrInfo & tii,const ARMBaseRegisterInfo & tri,const ARMSubtarget & sti,const ScheduleDAG * DAG)39 ARMHazardRecognizer(const InstrItineraryData *ItinData, 40 const ARMBaseInstrInfo &tii, 41 const ARMBaseRegisterInfo &tri, 42 const ARMSubtarget &sti, 43 const ScheduleDAG *DAG) : 44 ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"), TII(tii), 45 TRI(tri), STI(sti), LastMI(0) {} 46 47 virtual HazardType getHazardType(SUnit *SU, int Stalls); 48 virtual void Reset(); 49 virtual void EmitInstruction(SUnit *SU); 50 virtual void AdvanceCycle(); 51 virtual void RecedeCycle(); 52 }; 53 54 } // end namespace llvm 55 56 #endif // ARMHAZARDRECOGNIZER_H 57