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https://github.com/c64scene-ar/llvm-6502.git
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54e4c36a73
The Cost field is removed. It was only being used in a very limited way, to indicate when the scheduler should attempt to protect a live register, and it isn't really needed to do that. If we ever want the scheduler to start inserting copies in non-prohibitive situations, we'll have to rethink some things anyway. A Latency field is added. Instead of giving each node a single fixed latency, each edge can have its own latency. This will eventually be used to model various micro-architecture properties more accurately. The PointerIntPair class and an internal union are now used, which reduce the overall size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60806 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
1.7 KiB
C++
58 lines
1.7 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 ScheduleDAGInstrs : public ScheduleDAG {
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public:
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ScheduleDAGInstrs(MachineBasicBlock *bb,
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const TargetMachine &tm);
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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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