llvm-6502/lib/Target/ARM/ARMHazardRecognizer.h
Bill Wendling 57148c166a Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183488 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-07 05:54:19 +00:00

50 lines
1.5 KiB
C++

//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines hazard recognizers for scheduling ARM functions.
//
//===----------------------------------------------------------------------===//
#ifndef ARMHAZARDRECOGNIZER_H
#define ARMHAZARDRECOGNIZER_H
#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
namespace llvm {
class ARMBaseInstrInfo;
class ARMBaseRegisterInfo;
class ARMSubtarget;
class MachineInstr;
/// ARMHazardRecognizer handles special constraints that are not expressed in
/// the scheduling itinerary. This is only used during postRA scheduling. The
/// ARM preRA scheduler uses an unspecialized instance of the
/// ScoreboardHazardRecognizer.
class ARMHazardRecognizer : public ScoreboardHazardRecognizer {
MachineInstr *LastMI;
unsigned FpMLxStalls;
public:
ARMHazardRecognizer(const InstrItineraryData *ItinData,
const ScheduleDAG *DAG)
: ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"),
LastMI(0) {}
virtual HazardType getHazardType(SUnit *SU, int Stalls);
virtual void Reset();
virtual void EmitInstruction(SUnit *SU);
virtual void AdvanceCycle();
virtual void RecedeCycle();
};
} // end namespace llvm
#endif // ARMHAZARDRECOGNIZER_H