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/*
* Copyright (C) 2012 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 "PutByIdStatus.h"
#include "CodeBlock.h"
#include "Structure.h"
#include "StructureChain.h"
namespace JSC {
PutByIdStatus PutByIdStatus::computeFor(CodeBlock* profiledBlock, unsigned bytecodeIndex, Identifier& ident)
{
UNUSED_PARAM(profiledBlock);
UNUSED_PARAM(bytecodeIndex);
UNUSED_PARAM(ident);
#if ENABLE(JIT) && ENABLE(VALUE_PROFILER)
if (profiledBlock->likelyToTakeSlowCase(bytecodeIndex))
return PutByIdStatus(TakesSlowPath, 0, 0, 0, notFound);
StructureStubInfo& stubInfo = profiledBlock->getStubInfo(bytecodeIndex);
if (!stubInfo.seen)
return PutByIdStatus(NoInformation, 0, 0, 0, notFound);
switch (stubInfo.accessType) {
case access_unset:
return PutByIdStatus(NoInformation, 0, 0, 0, notFound);
case access_put_by_id_replace: {
size_t offset = stubInfo.u.putByIdReplace.baseObjectStructure->get(
*profiledBlock->globalData(), ident);
if (offset != notFound) {
return PutByIdStatus(
SimpleReplace,
stubInfo.u.putByIdReplace.baseObjectStructure.get(),
0, 0,
offset);
}
return PutByIdStatus(TakesSlowPath, 0, 0, 0, notFound);
}
case access_put_by_id_transition_normal:
case access_put_by_id_transition_direct: {
size_t offset = stubInfo.u.putByIdTransition.structure->get(
*profiledBlock->globalData(), ident);
if (offset != notFound) {
return PutByIdStatus(
SimpleTransition,
stubInfo.u.putByIdTransition.previousStructure.get(),
stubInfo.u.putByIdTransition.structure.get(),
stubInfo.u.putByIdTransition.chain.get(),
offset);
}
return PutByIdStatus(TakesSlowPath, 0, 0, 0, notFound);
}
default:
return PutByIdStatus(TakesSlowPath, 0, 0, 0, notFound);
}
#else // ENABLE(JIT)
return PutByIdStatus(NoInformation, 0, 0, 0, notFound);
#endif // ENABLE(JIT)
}
} // namespace JSC
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