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/*
* Copyright (C) 2014 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 "DFGStructureRegistrationPhase.h"
#if ENABLE(DFG_JIT)
#include "DFGBasicBlockInlines.h"
#include "DFGGraph.h"
#include "DFGPhase.h"
#include "JSCInlines.h"
namespace JSC { namespace DFG {
class StructureRegistrationPhase : public Phase {
public:
StructureRegistrationPhase(Graph& graph)
: Phase(graph, "structure registration")
{
}
bool run()
{
// These are pretty dumb, but needed to placate subsequent assertions. We don't actually
// have to watch these because there is no way to transition away from it, but they are
// watchable and so we will assert if they aren't watched.
registerStructure(m_graph.m_vm.stringStructure.get());
registerStructure(m_graph.m_vm.getterSetterStructure.get());
for (FrozenValue* value : m_graph.m_frozenValues)
registerStructure(value->structure());
for (BlockIndex blockIndex = m_graph.numBlocks(); blockIndex--;) {
BasicBlock* block = m_graph.block(blockIndex);
if (!block)
continue;
for (unsigned nodeIndex = 0; nodeIndex < block->size(); ++nodeIndex) {
Node* node = block->at(nodeIndex);
switch (node->op()) {
case CheckStructure:
registerStructures(node->structureSet());
break;
case NewObject:
case ArrayifyToStructure:
case NewStringObject:
registerStructure(node->structure());
break;
case PutStructure:
case AllocatePropertyStorage:
case ReallocatePropertyStorage:
registerStructure(node->transition()->previous);
registerStructure(node->transition()->next);
break;
case MultiGetByOffset:
for (unsigned i = node->multiGetByOffsetData().variants.size(); i--;) {
GetByIdVariant& variant = node->multiGetByOffsetData().variants[i];
registerStructures(variant.structureSet());
// Don't need to watch anything in the structure chain because that would
// have been decomposed into CheckStructure's. Don't need to watch the
// callLinkStatus because we wouldn't use MultiGetByOffset if any of the
// variants did that.
ASSERT(!variant.callLinkStatus());
}
break;
case MultiPutByOffset:
for (unsigned i = node->multiPutByOffsetData().variants.size(); i--;) {
PutByIdVariant& variant = node->multiPutByOffsetData().variants[i];
registerStructures(variant.oldStructure());
if (variant.kind() == PutByIdVariant::Transition)
registerStructure(variant.newStructure());
}
break;
case NewArray:
case NewArrayBuffer:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->arrayStructureForIndexingTypeDuringAllocation(node->indexingType()));
break;
case NewTypedArray:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->typedArrayStructure(node->typedArrayType()));
break;
case ToString:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->stringObjectStructure());
break;
case CreateActivation:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->activationStructure());
break;
case NewRegexp:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->regExpStructure());
break;
case NewFunctionExpression:
case NewFunctionNoCheck:
registerStructure(m_graph.globalObjectFor(node->origin.semantic)->functionStructure());
break;
default:
break;
}
}
}
m_graph.m_structureRegistrationState = AllStructuresAreRegistered;
return true;
}
private:
void registerStructures(const StructureSet& set)
{
for (unsigned i = set.size(); i--;)
registerStructure(set[i]);
}
void registerStructure(Structure* structure)
{
if (structure)
m_graph.registerStructure(structure);
}
};
bool performStructureRegistration(Graph& graph)
{
SamplingRegion samplingRegion("DFG Structure Registration Phase");
return runPhase<StructureRegistrationPhase>(graph);
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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