1 //===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines hazard recognizers for scheduling ARM functions.
12 //===----------------------------------------------------------------------===//
14 #ifndef ARMHAZARDRECOGNIZER_H
15 #define ARMHAZARDRECOGNIZER_H
17 #include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
21 class ARMBaseInstrInfo;
22 class ARMBaseRegisterInfo;
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;
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) {}
47 virtual HazardType getHazardType(SUnit *SU, int Stalls);
49 virtual void EmitInstruction(SUnit *SU);
50 virtual void AdvanceCycle();
51 virtual void RecedeCycle();
54 } // end namespace llvm
56 #endif // ARMHAZARDRECOGNIZER_H