/// <summary>
/// Возвращает результат каскадного удаления живых и мертвых переменных,
/// выполненного над графом <paramref name="graph"/>.
/// </summary>
/// <param name="graph"></param>
public static ControlFlowGraph.ControlFlowGraph DeleteDeadVariables(ControlFlowGraph.ControlFlowGraph graph)
{
var resGraph = new ControlFlowGraph.ControlFlowGraph(
new List <LinkedList <Visitors.ThreeCode> >(graph.blocks));
foreach (var block in resGraph.blocks)
{
var replace = DeadOrAliveOptimization.DeleteDeadVariables(block);
block.Clear();
foreach (var line in replace)
{
block.AddLast(line);
}
}
return(resGraph);
}
/// <summary>
/// Применяет к графу <paramref name="graph"/> удаление мертвых переменных на основе
/// информации о множествах IN и OUT для блоков из <paramref name="InOut"/>.
/// Возвращает новый граф с выполненной на нем оптимизацией без изменения исходного графа.
/// </summary>
/// <param name="InOut"></param>
/// <param name="graph"></param>
/// <returns></returns>
public static ControlFlowGraph.ControlFlowGraph DeadOrAliveOnGraph(List <HashSet <string> > OutBlocks, ControlFlowGraph.ControlFlowGraph graph)
{
var resGraph = new ControlFlowGraph.ControlFlowGraph(
new List <LinkedList <Visitors.ThreeCode> >(graph.blocks));
if (OutBlocks.Count != resGraph.blocks.Count)
{
throw new ArgumentException("The number of elements in the sets OUT, graph.blocks must be equal");
}
for (int i = resGraph.blocks.Count - 1; i >= 0; i--)
{
var variables = new Dictionary <string, bool>();
foreach (var v in OutBlocks[i])
{
variables[v] = true;
}
resGraph.blocks[i] = DeadOrAliveOptimization.DeleteDeadVariables(resGraph.blocks[i], variables);
}
return(resGraph);
}