public void join(ICollection <Tuple <BasicEdge.Guard, SubexpressionCounter> > predecessors, StatementId si)
{
subexpressionCounts = new Dictionary <string, SubExpression>();
currentStatement = si;
// HashSet<string> ses = new HashSet<string>();
if (predecessors.Count == 1 && predecessors.First().Item2.currentStatement.predecessors.Count == 1)
{
subexpressionCounts = predecessors.First().Item2.subexpressionCounts;
}
else
{
foreach (var p in predecessors)
{
foreach (var v in p.Item2.subexpressionCounts)
{
SubExpression se = null;
if (!subexpressionCounts.TryGetValue(v.Key, out se))
{
subexpressionCounts.Add(v.Key, new SubExpression(v.Value));
// Debug.Assert(v.Key == subexpressionCounts[v.Key].fae.ToString());
}
else
{
se.merge(currentStatement, v.Value);
// Debug.Assert(v.Key == subexpressionCounts[v.Key].fae.ToString());
}
}
}
}
// currentStatement = null;
}