chromium/v8/src/objects/deoptimization-data.h

// Copyright 2023 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_OBJECTS_DEOPTIMIZATION_DATA_H_
#define V8_OBJECTS_DEOPTIMIZATION_DATA_H_

#include <vector>

#include "src/objects/bytecode-array.h"
#include "src/objects/fixed-array.h"
#include "src/utils/boxed-float.h"

// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"

namespace v8 {
namespace internal {

// This class holds data required during deoptimization. It does not have its
// own instance type.
class DeoptimizationLiteralArray : public TrustedWeakFixedArray { … };

enum class DeoptimizationLiteralKind { … };

// A deoptimization literal during code generation. For JS this is transformed
// into a heap object after code generation. For wasm the DeoptimizationLiteral
// is directly used by the deoptimizer.
class DeoptimizationLiteral { … };

// The DeoptimizationFrameTranslation is the on-heap representation of
// translations created during code generation in a (zone-allocated)
// DeoptimizationFrameTranslationBuilder. The translation specifies how to
// transform an optimized frame back into one or more unoptimized frames.
enum class TranslationOpcode;
class DeoptimizationFrameTranslation : public TrustedByteArray { … };

class DeoptTranslationIterator { … };

// Iterator over the deoptimization values. The iterator is not GC-safe.
class DeoptimizationFrameTranslation::Iterator
    : public DeoptTranslationIterator { … };

// DeoptimizationData is a fixed array used to hold the deoptimization data for
// optimized code.  It also contains information about functions that were
// inlined.  If N different functions were inlined then the first N elements of
// the literal array will contain these functions.
//
// It can be empty.
class DeoptimizationData : public ProtectedFixedArray { … };

}  // namespace internal
}  // namespace v8

#include "src/objects/object-macros-undef.h"

#endif  // V8_OBJECTS_DEOPTIMIZATION_DATA_H_