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 {
- const ARMBaseInstrInfo &TII;
- const ARMBaseRegisterInfo &TRI;
- const ARMSubtarget &STI;
-
MachineInstr *LastMI;
- unsigned Stalls;
- unsigned ITBlockSize; // No. of MIs in current IT block yet to be scheduled.
- MachineInstr *ITBlockMIs[4];
+ unsigned FpMLxStalls;
public:
ARMHazardRecognizer(const InstrItineraryData *ItinData,
- const ARMBaseInstrInfo &tii,
- const ARMBaseRegisterInfo &tri,
- const ARMSubtarget &sti) :
- ScoreboardHazardRecognizer(ItinData), TII(tii), TRI(tri), STI(sti),
- LastMI(0), ITBlockSize(0) {}
+ const ScheduleDAG *DAG)
+ : ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"),
+ LastMI(0) {}
- virtual HazardType getHazardType(SUnit *SU);
+ virtual HazardType getHazardType(SUnit *SU, int Stalls);
virtual void Reset();
virtual void EmitInstruction(SUnit *SU);
virtual void AdvanceCycle();