public static int RemoveUnreachableCode(Block block, Statement statement, int index)
{
if (statement is Statement.If)
{
Statement.If _if = (Statement.If)statement;
int v;
if (_if.Condition.TryGetIntValue(out v))
{
if (v == 0)
{
block.RemoveAt(index);
block.InsertRange(index, _if.ElseDoThis);
return index;
}
else
{
block.RemoveAt(index);
block.InsertRange(index, _if.ThenDoThis);
return index;
}
}
}
else if (statement is Statement.While)
{
Statement.While loop = (Statement.While)statement;
int v;
if (loop.WhileThisIsTrue.TryGetIntValue(out v) && v == 0)
{
block.RemoveAt(index);
return index;
}
}
else if (statement is Statement.Return)
{
block.RemoveRange(index + 1, block.Count - (index + 1));
}
return index + 1;
}
