/// <summary> /// Обратные рёбра /// </summary> /// <returns>Список обратных рёбер</returns> public static IReadOnlyList <(BasicBlock, BasicBlock)> GetBackEdges(this ControlFlowGraph cfg) => new BackEdges(cfg).BackEdgesFromCFG;
public INsOUTs ExecuteNonGeneric(ControlFlowGraph g)
{
var blocks = g.GetCurrentBasicBlocks();
var INs = new Dictionary <BasicBlock, Dictionary <string, LatticeValue> >();
var OUTs = new Dictionary <BasicBlock, Dictionary <string, LatticeValue> >();
var variables = new HashSet <string>();
foreach (var block in blocks)
{
foreach (var instr in block.GetInstructions())
{
if (CheckStr(instr.Result) && !variables.Contains(instr.Result))
{
variables.Add(instr.Result);
}
if (CheckStr(instr.Argument1) && instr.Argument1 != "True" &&
instr.Argument1 != "False" && !int.TryParse(instr.Argument1, out var temp1) && !variables.Contains(instr.Argument1))
{
variables.Add(instr.Argument1);
}
if (CheckStr(instr.Argument2) && instr.Argument2 != "True" && instr.Argument2 != "False" &&
!int.TryParse(instr.Argument2, out var temp2) && !variables.Contains(instr.Argument2))
{
variables.Add(instr.Argument2);
}
}
}
var temp = new Dictionary <string, LatticeValue>();
foreach (var elem in variables)
{
temp.Add(elem, new LatticeValue(LatticeTypeData.UNDEF));
}
foreach (var block in blocks)
{
INs.Add(block, temp.ToDictionary(entry => entry.Key, entry => entry.Value));
OUTs.Add(block, temp.ToDictionary(entry => entry.Key, entry => entry.Value));
}
var Changed = true;
while (Changed)
{
Changed = false;
foreach (var block in blocks)
{
var parents = g.GetParentsBasicBlocks(g.VertexOf(block)).Select(x => x.block);
INs[block] = parents.Select(x => OUTs[x])
.Aggregate(temp.ToDictionary(entry => entry.Key, entry => entry.Value), (x, y) => Collect(x, y));
var newOut = Transfer(block, INs[block]);
if (OUTs[block].Where(entry => newOut[entry.Key] != entry.Value).Any())
{
Changed = true;
OUTs[block] = newOut;
}
}
}
return(new INsOUTs {
IN = INs, OUT = OUTs
});
}
/// <summary> /// Приводимость графа /// </summary> public static bool IsReducibleGraph(this ControlFlowGraph cfg) => new BackEdges(cfg).GraphIsReducible;