bool VariableAccessData::predict(SpeculatedType prediction)
{
VariableAccessData* self = find();
bool result = mergeSpeculation(self->m_prediction, prediction);
if (result)
mergeSpeculation(m_argumentAwarePrediction, m_prediction);
return result;
}
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;
}
SpeculatedType RegisteredStructureSet::speculationFromStructures() const
{
SpeculatedType result = SpecNone;
forEach(
[&] (RegisteredStructure structure) {
mergeSpeculation(result, speculationFromStructure(structure.get()));
});
return result;
}
SpeculatedType StructureSet::speculationFromStructures() const
{
SpeculatedType result = SpecNone;
forEach(
[&] (Structure* structure) {
mergeSpeculation(result, speculationFromStructure(structure));
});
return result;
}
SpeculatedType StructureSet::speculationFromStructures() const
{
if (isThin()) {
if (!singleStructure())
return SpecNone;
return speculationFromStructure(singleStructure());
}
SpeculatedType result = SpecNone;
OutOfLineList* list = structureList();
for (unsigned i = 0; i < list->m_length; ++i)
mergeSpeculation(result, speculationFromStructure(list->list()[i]));
return result;
}
bool VariableAccessData::mergeArgumentAwarePrediction(SpeculatedType prediction)
{
return mergeSpeculation(find()->m_argumentAwarePrediction, prediction);
}