chromium/v8/src/compiler/escape-analysis.h

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_COMPILER_ESCAPE_ANALYSIS_H_
#define V8_COMPILER_ESCAPE_ANALYSIS_H_

#include "src/base/functional.h"
#include "src/common/globals.h"
#include "src/compiler/graph-reducer.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/persistent-map.h"
#include "src/objects/name.h"

namespace v8 {
namespace internal {

class TickCounter;

namespace compiler {

class CommonOperatorBuilder;
class VariableTracker;
class EscapeAnalysisTracker;

// {EffectGraphReducer} reduces up to a fixed point. It distinguishes changes to
// the effect output of a node from changes to the value output to reduce the
// number of revisitations.
class EffectGraphReducer { … };

// A variable is an abstract storage location, which is lowered to SSA values
// and phi nodes by {VariableTracker}.
class Variable { … };

// An object that can track the nodes in the graph whose current reduction
// depends on the value of the object.
class Dependable : public ZoneObject { … };

// A virtual object represents an allocation site and tracks the Variables
// associated with its fields as well as its global escape status.
class VirtualObject : public Dependable { … };

class EscapeAnalysisResult { … };

class V8_EXPORT_PRIVATE EscapeAnalysis final
    : public NON_EXPORTED_BASE(EffectGraphReducer) { … };

}  // namespace compiler
}  // namespace internal
}  // namespace v8

#endif  // V8_COMPILER_ESCAPE_ANALYSIS_H_