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/*
* Copyright (C) 2020 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.
*/
#include "config.h"
#include "DFGCodeOriginPool.h"
#if ENABLE(DFG_JIT)
namespace JSC { namespace DFG {
CodeOriginPool::CodeOriginPool()
{
// Ensure that CallSiteIndex 0 => non-inlined-function BytecodeIndex(0).
addCodeOrigin(CodeOrigin(BytecodeIndex(0)));
}
CallSiteIndex CodeOriginPool::addCodeOrigin(CodeOrigin codeOrigin)
{
if (m_codeOrigins.isEmpty()
|| m_codeOrigins.last() != codeOrigin)
m_codeOrigins.append(codeOrigin);
unsigned index = m_codeOrigins.size() - 1;
ASSERT(m_codeOrigins[index] == codeOrigin);
return CallSiteIndex(index);
}
CallSiteIndex CodeOriginPool::addUniqueCallSiteIndex(CodeOrigin codeOrigin)
{
m_codeOrigins.append(codeOrigin);
unsigned index = m_codeOrigins.size() - 1;
ASSERT(m_codeOrigins[index] == codeOrigin);
return CallSiteIndex(index);
}
CallSiteIndex CodeOriginPool::lastCallSite() const
{
RELEASE_ASSERT(m_codeOrigins.size());
return CallSiteIndex(m_codeOrigins.size() - 1);
}
DisposableCallSiteIndex CodeOriginPool::addDisposableCallSiteIndex(CodeOrigin codeOrigin)
{
if (!m_callSiteIndexFreeList.isEmpty()) {
unsigned index = m_callSiteIndexFreeList.takeLast();
m_codeOrigins[index] = codeOrigin;
return DisposableCallSiteIndex(index);
}
m_codeOrigins.append(codeOrigin);
unsigned index = m_codeOrigins.size() - 1;
ASSERT(m_codeOrigins[index] == codeOrigin);
return DisposableCallSiteIndex(index);
}
void CodeOriginPool::removeDisposableCallSiteIndex(DisposableCallSiteIndex callSite)
{
RELEASE_ASSERT(callSite.bits() < m_codeOrigins.size());
m_callSiteIndexFreeList.append(callSite.bits());
m_codeOrigins[callSite.bits()] = CodeOrigin();
}
void CodeOriginPool::shrinkToFit()
{
m_codeOrigins.shrinkToFit();
m_callSiteIndexFreeList.shrinkToFit();
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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