1 //==- llvm/CodeGen/ScheduleDAGInstrs.h - MachineInstr Scheduling -*- 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 implements the ScheduleDAGInstrs class, which implements
11 // scheduling for a MachineInstr-based dependency graph.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
16 #define LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
18 #include "llvm/CodeGen/ScheduleDAG.h"
21 class MachineLoopInfo;
22 class MachineDominatorTree;
24 class ScheduleDAGInstrs : public ScheduleDAG {
25 const MachineLoopInfo &MLI;
26 const MachineDominatorTree &MDT;
29 ScheduleDAGInstrs(MachineBasicBlock *bb,
30 const TargetMachine &tm,
31 const MachineLoopInfo &mli,
32 const MachineDominatorTree &mdt);
34 virtual ~ScheduleDAGInstrs() {}
36 /// NewSUnit - Creates a new SUnit and return a ptr to it.
38 SUnit *NewSUnit(MachineInstr *MI) {
39 SUnits.push_back(SUnit(MI, (unsigned)SUnits.size()));
40 SUnits.back().OrigNode = &SUnits.back();
41 return &SUnits.back();
44 /// BuildSchedUnits - Build SUnits from the MachineBasicBlock that we are
46 virtual void BuildSchedUnits();
48 /// ComputeLatency - Compute node latency.
50 virtual void ComputeLatency(SUnit *SU);
52 virtual MachineBasicBlock *EmitSchedule();
54 /// Schedule - Order nodes according to selected style, filling
55 /// in the Sequence member.
57 virtual void Schedule() = 0;
59 virtual void dumpNode(const SUnit *SU) const;
61 virtual std::string getGraphNodeLabel(const SUnit *SU) const;