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/*
* Copyright (C) 2025 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
#if ENABLE(WEBASSEMBLY)
#include <JavaScriptCore/WasmBaselineData.h>
#include <JavaScriptCore/WasmCallProfile.h>
#include <JavaScriptCore/WasmCallee.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/WTFString.h>
namespace JSC::Wasm {
class Module;
class MergedProfile {
WTF_MAKE_TZONE_ALLOCATED(MergedProfile);
WTF_MAKE_NONMOVABLE(MergedProfile);
friend class Module;
public:
class Candidates {
public:
Candidates() = default;
std::span<const std::tuple<Callee*, uint32_t>> callees() const LIFETIME_BOUND
{
return std::span { m_callees }.first(m_size);
}
bool isCalled() const { return !!m_totalCount; }
bool isEmpty() const { return !m_size; }
bool isMegamorphic() const { return m_isMegamorphic; }
uint32_t totalCount() const { return m_totalCount; }
void merge(const CallProfile&);
Candidates finalize() const;
private:
bool add(Callee*, uint32_t);
void markAsMegamorphic(uint32_t count);
uint32_t m_totalCount { 0 };
uint8_t m_size { 0 };
bool m_isMegamorphic { false };
std::array<std::tuple<Callee*, uint32_t>, CallProfile::maxPolymorphicCallees> m_callees { };
};
MergedProfile(const IPIntCallee&);
bool isCalled(size_t index) const { return m_callSites[index].isCalled(); }
Candidates candidates(size_t index) const { return m_callSites[index].finalize(); }
bool isMegamorphic(size_t index) const { return m_callSites[index].isMegamorphic(); }
void merge(BaselineData&);
private:
Vector<Candidates> m_callSites;
};
} // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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