private void constructReachingDef(SyntaxNode node)
{
if (node == null)
{
return;
}
if (!reachingDefDictionary.ContainsKey(node))
{
reachingDefDictionary[node] = new InOutData <SyntaxNode>();
reachingRunAgain = true;
}
ISet <SyntaxNode> previousNodes = cfg.GetPredecessors(node);
if (previousNodes.Count != 0)
{
foreach (SyntaxNode previousNode in previousNodes)
{
if (reachingDefDictionary.ContainsKey(previousNode))
{
if (!reachingDefDictionary[previousNode].outSet.IsSubsetOf(reachingDefDictionary[node].inSet))
{
reachingDefDictionary[node].inSet.UnionWith(reachingDefDictionary[previousNode].outSet);
reachingRunAgain = true;
}
}
}
}
AssignmentExpressionSyntax assignmentExpressionSyntax = node.DescendantNodesAndSelf().OfType <AssignmentExpressionSyntax>().FirstOrDefault();
LocalDeclarationStatementSyntax localDeclarationStatementSyntax = node as LocalDeclarationStatementSyntax;
VariableDeclarationSyntax variableDeclarationSyntax = node as VariableDeclarationSyntax;
if (assignmentExpressionSyntax != null)
{
ISet <SyntaxNode> toRemove = new HashSet <SyntaxNode>();
foreach (SyntaxNode inDef in reachingDefDictionary[node].inSet)
{
String toTest = getAssignmentOrLocalVarName(inDef);
if (toTest != null && toTest.Equals(getAssignmentOrLocalVarName(assignmentExpressionSyntax)))
{
toRemove.Add(inDef);
}
}
ISet <SyntaxNode> InWithRemovedNodesRemoved = copySet(reachingDefDictionary[node].inSet);
InWithRemovedNodesRemoved.ExceptWith(toRemove);
InWithRemovedNodesRemoved.Add(assignmentExpressionSyntax);
if (!InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].inSet) && !InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].outSet))
{
reachingDefDictionary[node].outSet = InWithRemovedNodesRemoved;
reachingRunAgain = true;
}
}
else if (localDeclarationStatementSyntax != null)
{
ISet <SyntaxNode> toRemove = new HashSet <SyntaxNode>();
foreach (SyntaxNode inDef in reachingDefDictionary[node].inSet)
{
String toTest = getAssignmentOrLocalVarName(inDef);
if (toTest != null && toTest.Equals(getAssignmentOrLocalVarName(localDeclarationStatementSyntax)))
{
toRemove.Add(inDef);
}
}
ISet <SyntaxNode> InWithRemovedNodesRemoved = copySet(reachingDefDictionary[node].inSet);
InWithRemovedNodesRemoved.ExceptWith(toRemove);
InWithRemovedNodesRemoved.Add(localDeclarationStatementSyntax);
if (!InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].inSet) && !InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].outSet))
{
reachingDefDictionary[node].outSet = InWithRemovedNodesRemoved;
reachingRunAgain = true;
}
}
else if (variableDeclarationSyntax != null)
{
ISet <SyntaxNode> toRemove = new HashSet <SyntaxNode>();
foreach (SyntaxNode inDef in reachingDefDictionary[node].inSet)
{
String toTest = getAssignmentOrLocalVarName(inDef);
if (toTest != null && toTest.Equals(getAssignmentOrLocalVarName(variableDeclarationSyntax)))
{
toRemove.Add(inDef);
}
}
ISet <SyntaxNode> InWithRemovedNodesRemoved = copySet(reachingDefDictionary[node].inSet);
InWithRemovedNodesRemoved.ExceptWith(toRemove);
InWithRemovedNodesRemoved.Add(variableDeclarationSyntax);
if (!InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].inSet) && !InWithRemovedNodesRemoved.SetEquals(reachingDefDictionary[node].outSet))
{
reachingDefDictionary[node].outSet = InWithRemovedNodesRemoved;
reachingRunAgain = true;
}
}
else
{
if (!reachingDefDictionary[node].outSet.SetEquals(reachingDefDictionary[node].inSet))
{
reachingDefDictionary[node].outSet.UnionWith(reachingDefDictionary[node].inSet);
reachingRunAgain = true;
}
}
visitedNodes.Add(node);
foreach (SyntaxNode successor in cfg.GetSuccessors(node))
{
if (!visitedNodes.Contains(successor))
{
constructReachingDef(successor);
}
}
}
private void constructLiveVar(SyntaxNode node)
{
if (node == null)
{
return;
}
if (!liveVarDictionary.ContainsKey(node))
{
liveVarDictionary[node] = new InOutData <IdentifierNameSyntax>();
liveVarRunAgain = true;
}
//Set up out set
ISet <SyntaxNode> subsequentNodes = cfg.GetSuccessors(node);
if (subsequentNodes.Count != 0)
{
foreach (SyntaxNode subsequentNode in subsequentNodes)
{
if (liveVarDictionary.ContainsKey(subsequentNode))
{
if (!liveVarDictionary[subsequentNode].inSet.IsSubsetOf(liveVarDictionary[node].outSet))
{
liveVarDictionary[node].outSet.UnionWith(liveVarDictionary[subsequentNode].inSet);
liveVarRunAgain = true;
}
}
}
}
//Set up in set
AssignmentExpressionSyntax assignmentExpressionSyntax = node.DescendantNodesAndSelf().OfType <AssignmentExpressionSyntax>().FirstOrDefault();
LocalDeclarationStatementSyntax localDeclarationStatementSyntax = node as LocalDeclarationStatementSyntax;
VariableDeclarationSyntax variableDeclarationSyntax = node as VariableDeclarationSyntax;
if (assignmentExpressionSyntax != null)
{
ISet <IdentifierNameSyntax> toRemove = new HashSet <IdentifierNameSyntax>();
foreach (IdentifierNameSyntax identifierNameSyntax in liveVarDictionary[node].outSet)
{
if (getAssignmentOrLocalVarName(assignmentExpressionSyntax).Equals(identifierNameSyntax.ToString()))
{
toRemove.Add(identifierNameSyntax);
}
}
ISet <IdentifierNameSyntax> OutWithRemovedNodesRemoved = copySet(liveVarDictionary[node].outSet);
OutWithRemovedNodesRemoved.ExceptWith(toRemove);
liveVarHelper(node, OutWithRemovedNodesRemoved);
if (!OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].inSet) && !OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].outSet))
{
liveVarDictionary[node].inSet = OutWithRemovedNodesRemoved;
liveVarRunAgain = true;
}
}
else if (localDeclarationStatementSyntax != null)
{
ISet <IdentifierNameSyntax> toRemove = new HashSet <IdentifierNameSyntax>();
foreach (IdentifierNameSyntax identifierNameSyntax in liveVarDictionary[node].outSet)
{
if (getAssignmentOrLocalVarName(localDeclarationStatementSyntax).Equals(identifierNameSyntax.ToString()))
{
toRemove.Add(identifierNameSyntax);
}
}
ISet <IdentifierNameSyntax> OutWithRemovedNodesRemoved = copySet(liveVarDictionary[node].outSet);
OutWithRemovedNodesRemoved.ExceptWith(toRemove);
liveVarHelper(node, OutWithRemovedNodesRemoved);
if (!OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].inSet) && !OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].outSet))
{
liveVarDictionary[node].inSet = OutWithRemovedNodesRemoved;
liveVarRunAgain = true;
}
}
else if (variableDeclarationSyntax != null)
{
ISet <IdentifierNameSyntax> toRemove = new HashSet <IdentifierNameSyntax>();
foreach (IdentifierNameSyntax identifierNameSyntax in liveVarDictionary[node].outSet)
{
if (getAssignmentOrLocalVarName(variableDeclarationSyntax).Equals(identifierNameSyntax.ToString()))
{
if (liveVarDictionary[node].inSet.Contains(identifierNameSyntax))
{
toRemove.Add(identifierNameSyntax);
}
}
}
ISet <IdentifierNameSyntax> OutWithRemovedNodesRemoved = copySet(liveVarDictionary[node].outSet);
OutWithRemovedNodesRemoved.ExceptWith(toRemove);
liveVarHelper(node, OutWithRemovedNodesRemoved);
if (!OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].inSet) && !OutWithRemovedNodesRemoved.SetEquals(liveVarDictionary[node].outSet))
{
liveVarDictionary[node].inSet = OutWithRemovedNodesRemoved;
liveVarRunAgain = true;
}
}
else
{
ISet <IdentifierNameSyntax> outCopy = copySet(liveVarDictionary[node].outSet);
liveVarHelper(node, outCopy);
if (!outCopy.SetEquals(liveVarDictionary[node].inSet))
{
liveVarDictionary[node].inSet = outCopy;
liveVarRunAgain = true;
}
}
visitedNodes.Add(node);
foreach (SyntaxNode predecessor in cfg.GetPredecessors(node))
{
if (!visitedNodes.Contains(predecessor))
{
constructLiveVar(predecessor);
}
}
}