lib/Target/ARM/ARMHazardRecognizer.h

   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