protected override bool Merge(
AbstractStackState <VariabilityInfo> a,
AbstractStackState <VariabilityInfo> b,
out AbstractStackState <VariabilityInfo> m)
{
List <VariabilityInfo> stack = new List <VariabilityInfo>();
bool changed = Merge(i => a[i], i => b[i], stack, a.Depth);
List <VariabilityInfo> locals = new List <VariabilityInfo>();
if (Merge(i => a.GetLocal(i), i => b.GetLocal(i), locals, a.NumLocals))
{
changed = true;
}
List <VariabilityInfo> args = new List <VariabilityInfo>();
if (Merge(i => a.GetArgument(i), i => b.GetArgument(i), args, a.NumArguments))
{
changed = true;
}
if (a.HasUniqueSuccessor() != b.HasUniqueSuccessor())
{
changed = true;
}
m = new IndependentStackState(stack, locals, args,
a.HasUniqueSuccessor() && b.HasUniqueSuccessor());
return(changed);
}