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3f23744df4
computation code. Also, avoid adding output-depenency edges when both defs are dead, which frequently happens with EFLAGS defs. Compute Depth and Height lazily, and always in terms of edge latency values. For the schedulers that don't care about latency, edge latencies are set to 1. Eliminate Cycle and CycleBound, and LatencyPriorityQueue's Latencies array. These are all subsumed by the Depth and Height fields. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61073 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
//==- llvm/CodeGen/ScheduleDAGInstrs.h - MachineInstr Scheduling -*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ScheduleDAGInstrs class, which implements
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// scheduling for a MachineInstr-based dependency graph.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
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#define LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
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#include "llvm/CodeGen/ScheduleDAG.h"
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namespace llvm {
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class MachineLoopInfo;
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class MachineDominatorTree;
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class ScheduleDAGInstrs : public ScheduleDAG {
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const MachineLoopInfo &MLI;
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const MachineDominatorTree &MDT;
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public:
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ScheduleDAGInstrs(MachineBasicBlock *bb,
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const TargetMachine &tm,
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const MachineLoopInfo &mli,
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const MachineDominatorTree &mdt);
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virtual ~ScheduleDAGInstrs() {}
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/// NewSUnit - Creates a new SUnit and return a ptr to it.
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///
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SUnit *NewSUnit(MachineInstr *MI) {
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SUnits.push_back(SUnit(MI, (unsigned)SUnits.size()));
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SUnits.back().OrigNode = &SUnits.back();
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return &SUnits.back();
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}
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/// BuildSchedUnits - Build SUnits from the MachineBasicBlock that we are
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/// input.
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virtual void BuildSchedUnits();
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/// ComputeLatency - Compute node latency.
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///
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virtual void ComputeLatency(SUnit *SU);
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virtual MachineBasicBlock *EmitSchedule();
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/// Schedule - Order nodes according to selected style, filling
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/// in the Sequence member.
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///
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virtual void Schedule() = 0;
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virtual void dumpNode(const SUnit *SU) const;
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virtual std::string getGraphNodeLabel(const SUnit *SU) const;
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};
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}
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#endif
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