/// <summary>
/// Set v to a new value that is abstracted by av
/// </summary>
/// <param name="v"></param>
/// <param name="av"></param>
private void AssignAVal(Variable v, Lattice.AVal av)
{
ISymValue sv = this.egraph.FreshSymbol();
this.egraph[v] = sv;
this.egraph[sv] = av;
}
public void AssignFrameForExposable(ISymValue guard)
{
ISymValue guardedObject = this.egraph[FrameFor, guard];
ISymValue guardTypeObject = this.egraph[StaticTypeOf, guard];
Lattice.AVal guardsType = (Lattice.AVal) this.egraph[guardTypeObject];
this.egraph[guardedObject] = new Lattice.AVal(guardsType.lowerBound, guardsType.upperBound);
}
public void AssignFrameForExposed(ISymValue guard)
{
ISymValue guardedObject = this.egraph[FrameFor, guard];
ISymValue dummy = this.egraph[StaticTypeOf, guard];
Lattice.AVal guardsType = (Lattice.AVal) this.egraph[dummy];
this.egraph[guardedObject] = new Lattice.AVal(guardsType.lowerBound.BaseType, guardsType.upperBound.BaseType);
}
internal TypeNode LowerBoundOfObjectPointedToByFrame(Variable guardVariable)
{
ISymValue guard = this.egraph[guardVariable];
ISymValue guardedObject = this.egraph[FrameFor, guard];
Lattice.AVal invLevel = (Lattice.AVal) this.egraph[guardedObject];
return(invLevel.lowerBound);
}
public void AssignFrameForNotExposed(Variable guardVariable)
{
ISymValue guard = this.egraph[guardVariable];
ISymValue guardTypeObject = this.egraph[StaticTypeOf, guard];
Lattice.AVal guardsType = (Lattice.AVal) this.egraph[guardTypeObject];
ISymValue guardedObject = this.egraph[FrameFor, guard];
this.egraph[guardedObject] = guardsType;
}
public bool IsFrameExposable(Variable guardVariable)
{
ISymValue guard = this.egraph[guardVariable];
ISymValue guardedObject = this.egraph[FrameFor, guard];
ISymValue guardTypeObject = this.egraph[StaticTypeOf, guard];
Lattice.AVal guardsType = (Lattice.AVal) this.egraph[guardTypeObject];
Lattice.AVal guardedObjectsType = (Lattice.AVal) this.egraph[guardedObject];
return(guardsType.lowerBound == guardedObjectsType.lowerBound);
}
public bool IsNotExposed(Variable v)
{
Lattice.AVal valueOfV = GetAVal(v);
return(valueOfV == Lattice.AVal.IsNotExposed);
}
