public DataType VisitUnion(UnionType ut)
{
// Do not transform user-defined types
if (ut.UserDefined)
{
return(ut);
}
foreach (var alt in ut.Alternatives.Values)
{
alt.DataType = alt.DataType.Accept(this);
}
var upsm = new UnionPointersStructuresMatcher();
if (upsm.Match(ut))
{
StructureMerger sm = new StructureMerger(upsm.Structures, upsm.EquivalenceClasses);
sm.Merge();
Changed = true;
return(new Pointer(sm.MergedClass, upsm.PointerBitSize));
}
UnionType utNew = FactorDuplicateAlternatives(ut);
var dt = utNew.Simplify();
Changed |= (!(dt is UnionType utNew2) ||
utNew2.Alternatives.Count != ut.Alternatives.Count);
return(dt);
}
public DataType VisitUnion(UnionType ut)
{
foreach (var alt in ut.Alternatives.Values)
{
alt.DataType = alt.DataType.Accept(this);
}
var upsm = new UnionPointersStructuresMatcher();
if (upsm.Match(ut))
{
StructureMerger sm = new StructureMerger(upsm.Structures, upsm.EquivalenceClasses);
sm.Merge();
Changed = true;
return(new Pointer(sm.MergedClass, upsm.PointerSize));
}
UnionType utNew = FactorDuplicateAlternatives(ut);
var dt = utNew.Simplify();
utNew = dt as UnionType;
if (utNew == null || utNew.Alternatives.Count != ut.Alternatives.Count)
{
Changed = true;
}
return(dt);
}
public void Merge1()
{
TypeVariable tv1 = new TypeVariable(1);
TypeVariable tv2 = new TypeVariable(2);
StructureType s1 = new StructureType { Fields = { { 4, PrimitiveType.Pointer32 } } };
StructureType s2 = new StructureType { Fields = { { 4, PrimitiveType.Pointer32 } } };
EquivalenceClass c1 = new EquivalenceClass(tv1);
EquivalenceClass c2 = new EquivalenceClass(tv2);
c1.DataType = s1;
c2.DataType = s2;
StructureMerger sm = new StructureMerger(new StructureType[] { s1, s2 }, new EquivalenceClass[] { c1, c2 } );
sm.Merge();
Assert.AreEqual("(struct (4 ptr32 ptr0004))", c1.DataType.ToString());
}