public void PreventLoopMerging(IStatement mutated, IStatement affected, ICollection <IVariableDeclaration> loopVars)
{
int source = indexOf[mutated];
int target = indexOf[affected];
if (!graph.TryGetEdge(source, target, out int edge))
{
edge = graph.AddEdge(source, target);
prohibitedLoopVars[edge] = loopVars;
}
else
{
ICollection <IVariableDeclaration> list = prohibitedLoopVars[edge];
if (list == null)
{
list = new Set <IVariableDeclaration>(ReferenceEqualityComparer <IVariableDeclaration> .Instance);
prohibitedLoopVars[edge] = list;
}
list.AddRange(loopVars);
}
}