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"
22 class MachineConstantPool;
23 class MachineFunction;
24 class MachineModuleInfo;
25 class MachineRegisterInfo;
27 class TargetRegisterInfo;
30 class SelectionDAGISel;
31 class TargetInstrInfo;
32 class TargetInstrDesc;
35 class TargetRegisterClass;
37 class ScheduleDAGInstrs : public ScheduleDAG {
39 ScheduleDAGInstrs(MachineBasicBlock *bb,
40 const TargetMachine &tm);
42 virtual ~ScheduleDAGInstrs() {}
44 /// NewSUnit - Creates a new SUnit and return a ptr to it.
46 SUnit *NewSUnit(MachineInstr *MI) {
47 SUnits.push_back(SUnit(MI, (unsigned)SUnits.size()));
48 SUnits.back().OrigNode = &SUnits.back();
49 return &SUnits.back();
52 /// BuildSchedUnits - Build SUnits from the MachineBasicBlock that we are
54 virtual void BuildSchedUnits();
56 virtual MachineBasicBlock *EmitSchedule();
58 /// Schedule - Order nodes according to selected style, filling
59 /// in the Sequence member.
61 virtual void Schedule() = 0;
63 virtual void dumpNode(const SUnit *SU) const;
65 virtual std::string getGraphNodeLabel(const SUnit *SU) const;