bool AbstractValue::mergeOSREntryValue(Graph& graph, JSValue value)
{
AbstractValue oldMe = *this;
if (isClear()) {
FrozenValue* frozenValue = graph.freeze(value);
if (frozenValue->pointsToHeap()) {
m_structure = frozenValue->structure();
m_arrayModes = asArrayModes(frozenValue->structure()->indexingType());
} else {
m_structure.clear();
m_arrayModes = 0;
}
m_type = speculationFromValue(value);
m_value = value;
} else {
mergeSpeculation(m_type, speculationFromValue(value));
if (!!value && value.isCell()) {
Structure* structure = value.asCell()->structure();
graph.registerStructure(structure);
mergeArrayModes(m_arrayModes, asArrayModes(structure->indexingType()));
m_structure.merge(StructureSet(structure));
}
if (m_value != value)
m_value = JSValue();
}
checkConsistency();
assertIsRegistered(graph);
return oldMe != *this;
}
ArrayModes RegisteredStructureSet::arrayModesFromStructures() const
{
ArrayModes result = 0;
forEach(
[&] (RegisteredStructure structure) {
mergeArrayModes(result, asArrayModes(structure->indexingType()));
});
return result;
}
ArrayModes StructureSet::arrayModesFromStructures() const
{
if (isThin()) {
if (!singleStructure())
return 0;
return asArrayModes(singleStructure()->indexingType());
}
ArrayModes result = 0;
OutOfLineList* list = structureList();
for (unsigned i = 0; i < list->m_length; ++i)
mergeArrayModes(result, asArrayModes(list->list()[i]->indexingType()));
return result;
}