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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LOGO_PHASE_H__
#define __LOGO_PHASE_H__
#include <logo/Pass.h>
#include <loco.h>
#include <vector>
#include <memory>
namespace logo
{
// Phase is a collection of Pass(es)
using Phase = std::vector<std::unique_ptr<Pass>>;
enum class PhaseEvent
{
PhaseBegin,
PhaseEnd,
PassBegin,
PassEnd,
};
template <PhaseEvent E> struct PhaseEventInfo;
template <> class PhaseEventInfo<PhaseEvent::PhaseBegin>
{
// Empty
};
template <> class PhaseEventInfo<PhaseEvent::PhaseEnd>
{
// Empty
};
template <> class PhaseEventInfo<PhaseEvent::PassBegin>
{
public:
void pass(const Pass *pass) { _pass = pass; }
const Pass *pass(void) const { return _pass; }
private:
const Pass *_pass;
};
template <> class PhaseEventInfo<PhaseEvent::PassEnd>
{
public:
void pass(const Pass *pass) { _pass = pass; }
const Pass *pass(void) const { return _pass; }
void changed(bool changed) { _changed = changed; }
bool changed(void) const { return _changed; }
private:
const Pass *_pass;
bool _changed;
};
struct PhaseEventListener
{
virtual ~PhaseEventListener() = default;
virtual void notify(const PhaseEventInfo<PhaseEvent::PhaseBegin> *) { return; };
virtual void notify(const PhaseEventInfo<PhaseEvent::PhaseEnd> *) { return; };
virtual void notify(const PhaseEventInfo<PhaseEvent::PassBegin> *) { return; };
virtual void notify(const PhaseEventInfo<PhaseEvent::PassEnd> *) { return; };
};
// TODO Will be other mix-ins for Phase Runners?
class PhaseRunnerMixinObservable
{
public:
PhaseRunnerMixinObservable() = default;
public:
virtual ~PhaseRunnerMixinObservable() = default;
public:
void attach(PhaseEventListener *listener) { _listener = listener; }
public:
void notifyPhaseBegin(void) const
{
if (_listener)
{
PhaseEventInfo<PhaseEvent::PhaseBegin> info;
_listener->notify(&info);
}
}
void notifyPhaseEnd(void) const
{
if (_listener)
{
PhaseEventInfo<PhaseEvent::PhaseEnd> info;
_listener->notify(&info);
}
}
void notifyPassBegin(Pass *pass) const
{
if (_listener)
{
PhaseEventInfo<PhaseEvent::PassBegin> info;
info.pass(pass);
_listener->notify(&info);
}
}
void notifyPassEnd(Pass *pass, bool changed) const
{
if (_listener)
{
PhaseEventInfo<PhaseEvent::PassEnd> info;
info.pass(pass);
info.changed(changed);
_listener->notify(&info);
}
}
private:
PhaseEventListener *_listener = nullptr;
};
enum class PhaseStrategy
{
// Run all the passes until there is no pass that makes a change
Saturate,
// Same as Saturate but will restart from the first when there is a change
Restart,
};
template <PhaseStrategy S> class PhaseRunner;
template <> class PhaseRunner<PhaseStrategy::Saturate> final : public PhaseRunnerMixinObservable
{
public:
PhaseRunner(loco::Graph *graph) : _graph{graph}
{
// DO NOTHING
}
public:
void run(const Phase &) const;
private:
loco::Graph *_graph;
};
template <> class PhaseRunner<PhaseStrategy::Restart> final : public PhaseRunnerMixinObservable
{
public:
PhaseRunner(loco::Graph *graph) : _graph{graph}
{
// DO NOTHING
}
public:
void run(const Phase &) const;
private:
loco::Graph *_graph;
};
} // namespace logo
#endif // __LOGO_PHASE_H__
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