private void RecordReadInLocalFunction(int slot)
{
var localFunc = GetNearestLocalFunctionOpt(currentSymbol);
Debug.Assert(localFunc != null);
var usages = GetOrCreateLocalFuncUsages(localFunc);
// If this slot is a struct with individually assignable
// fields we need to record each field assignment separately,
// since some fields may be assigned when this read is replayed
VariableIdentifier id = variableBySlot[slot];
var type = VariableType(id.Symbol).TypeSymbol;
Debug.Assert(!_emptyStructTypeCache.IsEmptyStructType(type));
if (EmptyStructTypeCache.IsTrackableStructType(type))
{
foreach (var field in _emptyStructTypeCache.GetStructInstanceFields(type))
{
int fieldSlot = GetOrCreateSlot(field, slot);
if (fieldSlot > 0 && !State.IsAssigned(fieldSlot))
{
RecordReadInLocalFunction(fieldSlot);
}
}
}
else
{
usages.ReadVars[slot] = true;
}
}
protected LocalDataFlowPass(
CSharpCompilation compilation,
Symbol member,
BoundNode node,
EmptyStructTypeCache emptyStructs,
bool trackUnassignments)
: base(compilation, member, node, nonMonotonicTransferFunction: trackUnassignments)
{
_emptyStructTypeCache = emptyStructs;
}