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 19namespace llvm { 20 21class ARMBaseInstrInfo; 22class ARMBaseRegisterInfo; 23class ARMSubtarget; 24class 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. 30class ARMHazardRecognizer : public ScoreboardHazardRecognizer { 31 const ARMBaseInstrInfo &TII; 32 const ARMBaseRegisterInfo &TRI; 33 const ARMSubtarget &STI; 34 35 MachineInstr *LastMI; 36 unsigned FpMLxStalls; 37 38public: 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