/// <summary>
/// Join that performs trickery to keep bounds on pointers if one side is null
/// </summary>
/// <param name="pc">PC of join point</param>
public StripeWithIntervalsForUnsafeCode Join(StripeWithIntervalsForUnsafeCode prevState, APC pc)
{
IntervalsForUnsafeCode thisInterval = (IntervalsForUnsafeCode)this.Left.Clone();
IntervalsForUnsafeCode prevInterval = (IntervalsForUnsafeCode)prevState.Left.Clone();
IntervalsForUnsafeCode joinLeftPart = (IntervalsForUnsafeCode)((IntervalsForUnsafeCode)this.Left).Join(prevState.Left, this.nullPointers.Union(prevState.nullPointers), pc);
// Pietro's
// if (!light)
if (true)
{
//Before permorming the join, it refines the information contained in the domain
StripeForUnsafeCode thisRightRefined = (StripeForUnsafeCode)((StripeForUnsafeCode)this.Right).RefineInternally();
StripeForUnsafeCode prevRightRefined = (StripeForUnsafeCode)((StripeForUnsafeCode)prevState.Right).RefineInternally();
StripeForUnsafeCode joinRightPart = (StripeForUnsafeCode)thisRightRefined.Join(prevRightRefined, this.nullPointers.Union(prevState.nullPointers), thisInterval, prevInterval, pc);
//It resets the set of the bottom pointers
nullPointers = new Set <BoxedExpression>();
return((StripeWithIntervalsForUnsafeCode)prevState.Reduce(joinLeftPart, joinRightPart));
}
//else
//{
// StripeForUnsafeCode joinRightPart = (StripeForUnsafeCode)this.Right.Join(prevState.Right, this.nullPointers.Union(prevState.nullPointers));
// nullPointers = new Set<BoxedExpression>();
// return (StripeWithIntervalsForUnsafeCode)prevState.Reduce(joinLeftPart, joinRightPart);
//}
}
public StripeWithIntervalsForUnsafeCode Widening(StripeWithIntervalsForUnsafeCode prevState, APC pc)
{
IntervalsForUnsafeCode thisInterval = (IntervalsForUnsafeCode)this.Left.Clone();
IntervalsForUnsafeCode prevInterval = (IntervalsForUnsafeCode)prevState.Left.Clone();
if (this.IsBottom)
{
return(prevState);
}
if (prevState.IsBottom)
{
return(this);
}
IntervalsForUnsafeCode joinLeftPart = (IntervalsForUnsafeCode)((IntervalsForUnsafeCode)this.Left).Widening(prevState.Left);
// Pietro's
//if (!light)
if (true)
{
//Since our domain is of finite height, we can use the version of join operator improved with the information abount null pointers
StripeForUnsafeCode thisRightRefined = (StripeForUnsafeCode)((StripeForUnsafeCode)this.Right).RefineInternally();
StripeForUnsafeCode prevRightRefined = (StripeForUnsafeCode)((StripeForUnsafeCode)prevState.Right).RefineInternally();
StripeForUnsafeCode joinRightPart = (StripeForUnsafeCode)thisRightRefined.Join(prevRightRefined, this.nullPointers.Union(prevState.nullPointers), thisInterval, prevInterval, pc);
//It resets the set of the bottom pointers
nullPointers = new Set <BoxedExpression>();
return((StripeWithIntervalsForUnsafeCode)prevState.Reduce(joinLeftPart, joinRightPart));
}
//else
//{
// StripeForUnsafeCode joinRightPart = (StripeForUnsafeCode)this.Right.Join(prevState.Right, this.nullPointers.Union(prevState.nullPointers));
// nullPointers = new Set<BoxedExpression>();
// return (StripeWithIntervalsForUnsafeCode)prevState.Reduce(joinLeftPart, joinRightPart);
//}
}