public MergeState(EGraph result, EGraph g1, EGraph g2)
{
this.Result = result;
this.G1 = g1;
this.G2 = g2;
this.Map = DoubleFunctionalMap.Empty;
this.changed = false;
// capture the idCounter before we update the result structure.
this.lastCommonVariable = result.idCounter;
}
private bool IsOldSymbol(SymbolicValue sv)
{
EGraph parent = this.parent;
if (parent == null)
{
return(false);
}
return(sv.UniqueId <= parent.LastSymbolId);
}
private EGraph ComputeCommonTail(EGraph g1, EGraph g2, out int updateSize)
{
EGraph current1 = g1;
EGraph current2 = g2;
if (g1.historySize <= 3 && g2.historySize > 100)
{
updateSize = g1.historySize + g2.historySize;
if (g1.root == g2.root)
{
return(g1.root);
}
return(null);
}
if (g2.historySize <= 3 && g1.historySize > 100)
{
updateSize = g1.historySize + g2.historySize;
if (g1.root == g2.root)
{
return(g1.root);
}
return(null);
}
while (current1 != current2)
{
if (current1 == null)
{
// no common tail
current2 = null; break;
}
if (current2 == null)
{
// no common tail
current1 = null; break;
}
if (current1.historySize > current2.historySize)
{
current1 = current1.parent; continue;
}
if (current2.historySize > current1.historySize)
{
current2 = current2.parent; continue;
}
// they have equal size
current1 = current1.parent;
current2 = current2.parent;
}
// now current1 == current2 == tail
EGraph tail = current1;
int tailSize = (tail != null)?tail.historySize:0;
updateSize = g1.historySize + g2.historySize - tailSize - tailSize;
return(tail);
}
private SymbolicValue AddJointEdge(SymbolicValue v1target, SymbolicValue v2target, IUniqueKey function, SymbolicValue resultRoot)
{
SymbolicValue rtarget = (SymbolicValue)Map[v1target, v2target];
bool newBinding = false;
if (rtarget == null)
{
// if we have visited v1target before, then the result graph is not isomorphic to G1
if (Map.ContainsKey1(v1target) || IsCommon(v1target) && v1target != v2target)
{
this.changed = true;
}
newBinding = true;
if (v1target.UniqueId <= lastCommonVariable && v1target == v2target)
{
rtarget = v1target; // reuse old symbol
}
else
{
rtarget = Result.FreshSymbolicValue();
}
this.Map = this.Map.Add(v1target, v2target, rtarget);
}
else
{
// See if info is already present
SymbolicValue oldTarget = Result.LookupWithoutManifesting(resultRoot, function);
if (oldTarget == rtarget)
{
// no change, don't record or change anything
return(null);
}
}
Result[resultRoot, function] = rtarget;
AbstractValue aval1 = G1[v1target];
AbstractValue aval2 = G2[v2target];
AbstractValue aresult = G1.elementLattice.Join(aval1, aval2);
Result[rtarget] = aresult;
if (!G1.elementLattice.LowerThanOrEqual(aresult, aval1))
{
this.changed = true;
}
if (Analyzer.Debug)
{
Console.WriteLine("AddJointEdge: {0} -{1}-> [{2},{3},{4}]",
resultRoot, EGraph.Function2String(function), v1target, v2target, rtarget);
}
return((newBinding)?rtarget:null);
}
public IEGraph Join(IEGraph g2, CfgBlock joinPoint, out IMergeInfo mergeInfo)
{
EGraph eg1 = this;
EGraph eg2 = (EGraph)g2;
int updateSize;
EGraph common = ComputeCommonTail(eg1, eg2, out updateSize);
EGraph result;
bool doReplay = true;
if (common == null)
{
doReplay = false;
result = new EGraph(eg1.elementLattice);
result.Block = joinPoint;
}
else
{
result = new EGraph(common, joinPoint);
}
if (Analyzer.Debug)
{
Console.WriteLine("Last common symbol: {0}", common.idCounter);
}
if (Analyzer.Statistics)
{
Console.WriteLine("G1:{0} G2:{1} Tail:{2} UpdateSize:{3}", eg1.historySize, eg2.historySize, result.historySize, updateSize);
}
MergeState ms = new MergeState(result, eg1, eg2);
// Heuristic for using Replay vs. full update
doReplay &= (common != eg1.root);
doReplay &= (eg1.historySize > 3);
doReplay &= (eg2.historySize > 3);
if (doReplay)
{
ms.Replay(common);
}
else
{
ms.AddMapping(eg1.constRoot, eg2.constRoot, result.constRoot);
ms.JoinSymbolicValue(eg1.constRoot, eg2.constRoot, result.constRoot);
}
mergeInfo = ms;
return(result);
}
public EGraph(MathematicalLattice elementLattice)
{
this.elementLattice = elementLattice;
this.constRoot = FreshSymbolicValue();
this.termMap = DoubleFunctionalMap.Empty;
this.absMap = FunctionalMap.Empty;
this.forwMap = FunctionalMap.Empty;
this.eqTermMap = DoubleFunctionalMap.Empty;
this.constant = false;
this.parent = null;
this.root = this;
this.historySize = 1;
this.updates = null;
}
public SerializedGraphData(List <Graph> graphs, List <GraphNode> graphNodes, List <WayPoint> wayPoints)
{
Graphs = new Dictionary <string, SerializedGraphData.EGraph>();
GraphNodes = new Dictionary <string, SerializedGraphData.EGraphNode>();
Waypoints = new Dictionary <string, SerializedGraphData.EWayPoint>();
foreach (Graph graph in graphs)
{
EGraph exportableGraph = new EGraph();
var graphNodeReferences = new List <string>();
foreach (GraphNode gn in graph.nodes)
{
graphNodeReferences.Add(gn.offset.ToString());
}
exportableGraph.graphNodeReferences = graphNodeReferences.ToArray();
Graphs.Add(graph.offset.ToString(), exportableGraph);
}
foreach (GraphNode graphNode in graphNodes)
{
EGraphNode exportableGraphNode = new EGraphNode();
exportableGraphNode.wayPointReference = graphNode.wayPoint.offset.ToString();
var exportableArcs = new List <EArc>();
foreach (Arc arc in graphNode.arcList.list)
{
exportableArcs.Add(new EArc()
{
capabilities = arc.capabilities,
targetGraphNodeReference = arc.graphNode.offset.ToString(),
weight = arc.weight
});
}
exportableGraphNode.arcs = exportableArcs.ToArray();
GraphNodes.Add(graphNode.offset.ToString(), exportableGraphNode);
}
foreach (WayPoint wp in wayPoints)
{
EWayPoint exportableWayPoint = new EWayPoint();
exportableWayPoint.position = wp.position;
exportableWayPoint.radius = wp.radius;
Waypoints.Add(wp.offset.ToString(), exportableWayPoint);
}
}
/// <summary>
/// Copy constructor
/// </summary>
/// <param name="from"></param>
private EGraph(EGraph from, CfgBlock at)
{
this.constRoot = from.constRoot;
this.termMap = from.termMap;
this.idCounter = from.idCounter;
this.absMap = from.absMap;
this.elementLattice = from.elementLattice;
this.forwMap = from.forwMap;
this.eqTermMap = from.eqTermMap;
// keep history
this.updates = from.updates;
this.parent = from;
this.root = from.root;
this.historySize = from.historySize + 1;
this.Block = at;
// set from to constant
from.constant = true;
}
public void EmitTrace(TypeSystem ts, int length, int lineEmitted)
{
EGraph current = this;
while (current != null && length > 0)
{
if (current.Block != null)
{
Node b = current.Block.EndSourceContext();
int line = b.SourceContext.EndLine;
if (line != 0 && line != lineEmitted)
{
ts.HandleError(b, Error.RelatedErrorLocation);
lineEmitted = line;
length--;
}
}
current = current.parent;
}
}
public void Replay(EGraph common) {
Replay(this.G1.updates, common.updates);
Replay(this.G2.updates, common.updates);
}
public MergeState(EGraph result, EGraph g1, EGraph g2) {
this.Result = result;
this.G1 = g1;
this.G2 = g2;
this.Map = DoubleFunctionalMap.Empty;
this.changed = false;
// capture the idCounter before we update the result structure.
this.lastCommonVariable = result.idCounter;
}
private EGraph ComputeCommonTail(EGraph g1, EGraph g2, out int updateSize) {
EGraph current1 = g1;
EGraph current2 = g2;
if (g1.historySize <= 3 && g2.historySize > 100) {
updateSize = g1.historySize + g2.historySize;
if (g1.root == g2.root) {
return g1.root;
}
return null;
}
if (g2.historySize <= 3 && g1.historySize > 100) {
updateSize = g1.historySize + g2.historySize;
if (g1.root == g2.root) {
return g1.root;
}
return null;
}
while (current1 != current2) {
if (current1 == null) {
// no common tail
current2 = null; break;
}
if (current2 == null) {
// no common tail
current1 = null; break;
}
if (current1.historySize > current2.historySize) {
current1 = current1.parent; continue;
}
if (current2.historySize > current1.historySize) {
current2 = current2.parent; continue;
}
// they have equal size
current1 = current1.parent;
current2 = current2.parent;
}
// now current1 == current2 == tail
EGraph tail = current1;
int tailSize = (tail != null)?tail.historySize:0;
updateSize = g1.historySize + g2.historySize - tailSize - tailSize;
return tail;
}
public IEGraph Join(IEGraph g2, CfgBlock joinPoint, out IMergeInfo mergeInfo) {
EGraph eg1 = this;
EGraph eg2 = (EGraph)g2;
int updateSize;
EGraph common = ComputeCommonTail(eg1, eg2, out updateSize);
EGraph result;
bool doReplay = true;
if (common == null) {
doReplay = false;
result = new EGraph(eg1.elementLattice);
result.Block = joinPoint;
}
else {
result = new EGraph(common, joinPoint);
}
if (Analyzer.Debug) {
Console.WriteLine("Last common symbol: {0}", common.idCounter);
}
if (Analyzer.Statistics) {
Console.WriteLine("G1:{0} G2:{1} Tail:{2} UpdateSize:{3}", eg1.historySize, eg2.historySize, result.historySize, updateSize);
}
MergeState ms = new MergeState(result, eg1, eg2);
// Heuristic for using Replay vs. full update
doReplay &= (common != eg1.root);
doReplay &= (eg1.historySize > 3);
doReplay &= (eg2.historySize > 3);
if (doReplay) {
ms.Replay(common);
}
else {
ms.AddMapping(eg1.constRoot, eg2.constRoot, result.constRoot);
ms.JoinSymbolicValue(eg1.constRoot, eg2.constRoot, result.constRoot);
}
mergeInfo = ms;
return result;
}
/// <summary>
/// Copy constructor
/// </summary>
/// <param name="from"></param>
private EGraph(EGraph from, CfgBlock at) {
this.constRoot = from.constRoot;
this.termMap = from.termMap;
this.idCounter = from.idCounter;
this.absMap = from.absMap;
this.elementLattice = from.elementLattice;
this.forwMap = from.forwMap;
this.eqTermMap = from.eqTermMap;
// keep history
this.updates = from.updates;
this.parent = from;
this.root = from.root;
this.historySize = from.historySize+1;
this.Block = at;
// set from to constant
from.constant = true;
}
public EGraph(MathematicalLattice elementLattice) {
this.elementLattice = elementLattice;
this.constRoot = FreshSymbolicValue();
this.termMap = DoubleFunctionalMap.Empty;
this.absMap = FunctionalMap.Empty;
this.forwMap = FunctionalMap.Empty;
this.eqTermMap = DoubleFunctionalMap.Empty;
this.constant = false;
this.parent = null;
this.root = this;
this.historySize = 1;
this.updates = null;
}
public void Replay(EGraph common)
{
Replay(this.G1.updates, common.updates);
Replay(this.G2.updates, common.updates);
}