private bool TryMakeLoop(IntervalConstruct interval, DominatorTree dominatorTree)
{
V_0 = DFSTBuilder.BuildTree(interval);
if (V_0.get_BackEdges().get_Count() == 0)
{
return(false);
}
V_2 = this.BuildLoop(V_0, out V_1);
V_4 = this.DetermineLoopType(V_1, V_2, interval, dominatorTree, out V_3);
if (V_1.get_Count() > 0)
{
V_5 = new LoopLogicalConstruct(interval.get_Entry() as ILogicalConstruct, V_1, V_4, V_3, this.typeSystem);
this.CleanUpEdges(V_5);
this.UpdateDominatorTree(dominatorTree, V_5);
return(true);
}
V_6 = V_0.get_BackEdges().GetEnumerator();
try
{
while (V_6.MoveNext())
{
V_7 = V_6.get_Current();
this.MarkAsGotoEdge(V_7.get_Start().get_Construct() as ILogicalConstruct, V_7.get_End().get_Construct() as ILogicalConstruct);
}
}
finally
{
((IDisposable)V_6).Dispose();
}
return(false);
}
private LoopType DetermineLoopType(HashSet <ILogicalConstruct> loopBody, HashSet <ILogicalConstruct> latchingNodes, IntervalConstruct interval, DominatorTree dominatorTree, out ConditionLogicalConstruct loopCondition)
{
V_0 = interval.get_Entry() as ILogicalConstruct;
V_1 = new HashSet <ILogicalConstruct>(latchingNodes);
dummyVar0 = V_1.Add(V_0);
V_2 = DFSTBuilder.BuildTree(V_0.get_Parent() as ILogicalConstruct);
V_3 = new HashSet <ILogicalConstruct>();
V_4 = loopBody.GetEnumerator();
try
{
while (V_4.MoveNext())
{
V_5 = V_4.get_Current();
V_6 = dominatorTree.GetDominanceFrontier(V_5).GetEnumerator();
try
{
while (V_6.MoveNext())
{
V_7 = (ILogicalConstruct)V_6.get_Current();
if (!interval.get_Children().Contains(V_7) || loopBody.Contains(V_7))
{
continue;
}
dummyVar1 = V_3.Add(V_7);
}
}
finally
{
((IDisposable)V_6).Dispose();
}
}
}
finally
{
((IDisposable)V_4).Dispose();
}
if (V_3.get_Count() == 0)
{
V_8 = V_2.get_ReversePostOrder().GetEnumerator();
try
{
while (V_8.MoveNext())
{
V_9 = V_8.get_Current().get_Construct() as ILogicalConstruct;
if (loopBody.Contains(V_9))
{
continue;
}
loopCondition = this.GetLoopConditionWithMaxIndex(V_2, loopBody, V_1, V_9);
if (loopCondition == null)
{
continue;
}
this.ExpandLoopBody(interval, loopBody, V_9);
if (loopCondition != V_0)
{
V_10 = 2;
goto Label1;
}
else
{
V_10 = 1;
goto Label1;
}
}
goto Label0;
}
finally
{
((IDisposable)V_8).Dispose();
}
Label1:
return(V_10);
}
V_11 = V_2.get_ReversePostOrder().get_Count();
V_4 = V_3.GetEnumerator();
try
{
while (V_4.MoveNext())
{
V_13 = V_4.get_Current();
V_14 = V_2.get_ConstructToNodeMap().get_Item(V_13).get_ReversePostOrderIndex();
if (V_14 >= V_11)
{
continue;
}
V_11 = V_14;
}
}
finally
{
((IDisposable)V_4).Dispose();
}
V_12 = V_2.get_ReversePostOrder().get_Item(V_11).get_Construct() as ILogicalConstruct;
loopCondition = this.GetLoopConditionWithMaxIndex(V_2, loopBody, V_1, V_12);
this.ExpandLoopBody(interval, loopBody, V_12);
if (loopCondition == null)
{
return(0);
}
if (loopCondition == V_0)
{
return(1);
}
return(2);
Label0:
if (!this.CanBeLoopCondition(V_0, loopBody))
{
loopCondition = null;
return(0);
}
loopCondition = V_0 as ConditionLogicalConstruct;
return(1);
}
