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/*
* Copyright (C) 2012-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "LazyOperandValueProfile.h"
namespace JSC {
class ScriptExecutable;
class CodeBlock;
class LazyOperandValueProfileParser;
class CompressedLazyValueProfileHolder {
WTF_MAKE_NONCOPYABLE(CompressedLazyValueProfileHolder);
public:
CompressedLazyValueProfileHolder() = default;
void computeUpdatedPredictions(const ConcurrentJSLocker&, CodeBlock*);
LazyOperandValueProfile* addOperandValueProfile(const LazyOperandValueProfileKey&);
JSValue* addSpeculationFailureValueProfile(BytecodeIndex);
UncheckedKeyHashMap<BytecodeIndex, JSValue*> speculationFailureValueProfileBucketsMap();
private:
friend class LazyOperandValueProfileParser;
inline void initializeData();
struct LazyValueProfileHolder {
WTF_MAKE_STRUCT_TZONE_ALLOCATED(LazyValueProfileHolder);
ConcurrentVector<LazyOperandValueProfile, 8> operandValueProfiles;
ConcurrentVector<std::pair<BytecodeIndex, JSValue>, 8> speculationFailureValueProfileBuckets;
};
std::unique_ptr<LazyValueProfileHolder> m_data;
};
class LazyOperandValueProfileParser {
WTF_MAKE_NONCOPYABLE(LazyOperandValueProfileParser);
public:
LazyOperandValueProfileParser() = default;
void initialize(CompressedLazyValueProfileHolder&);
LazyOperandValueProfile* getIfPresent(const LazyOperandValueProfileKey& key) const;
SpeculatedType prediction(const ConcurrentJSLocker&, const LazyOperandValueProfileKey&) const;
private:
UncheckedKeyHashMap<LazyOperandValueProfileKey, LazyOperandValueProfile*> m_map;
};
} // namespace JSC
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