// node id, var, version
//private HashMap<String, HashMap<Integer, FastSet<Integer>>> inVarVersions = new HashMap<String, HashMap<Integer, FastSet<Integer>>>();
// node id, var, version (direct branch)
//private HashMap<String, HashMap<Integer, FastSet<Integer>>> outVarVersions = new HashMap<String, HashMap<Integer, FastSet<Integer>>>();
// node id, var, version (negative branch)
//private HashMap<String, HashMap<Integer, FastSet<Integer>>> outNegVarVersions = new HashMap<String, HashMap<Integer, FastSet<Integer>>>();
// node id, var, version
//private HashMap<String, HashMap<Integer, FastSet<Integer>>> extraVarVersions = new HashMap<String, HashMap<Integer, FastSet<Integer>>>();
// var, version
// version, protected ranges (catch, finally)
// version, version
// ++ and --
// node.id, version, version
// finally exits
// versions memory dependencies
// field access vars (exprent id, var id)
// field access counter
// set factory
public virtual void SplitVariables(RootStatement root, StructMethod mt)
{
FlattenStatementsHelper flatthelper = new FlattenStatementsHelper();
DirectGraph dgraph = flatthelper.BuildDirectGraph(root);
HashSet <int> setInit = new HashSet <int>();
for (int i = 0; i < 64; i++)
{
setInit.Add(i);
}
factory = new FastSparseSetFactory <int>(setInit);
Sharpen.Collections.Put(extraVarVersions, dgraph.first.id, CreateFirstMap(mt, root
));
SetCatchMaps(root, dgraph, flatthelper);
// try {
// DotExporter.toDotFile(dgraph, new File("c:\\Temp\\gr12_my.dot"));
// } catch(Exception ex) {ex.printStackTrace();}
HashSet <string> updated = new HashSet <string>();
do
{
// System.out.println("~~~~~~~~~~~~~ \r\n"+root.toJava());
SsaStatements(dgraph, updated, false);
}while (!(updated.Count == 0));
// System.out.println("~~~~~~~~~~~~~ \r\n"+root.toJava());
SsaStatements(dgraph, updated, true);
ssuversions.InitDominators();
}
private SFormsFastMapDirect CreateFirstMap(StructMethod mt, RootStatement root)
{
bool thisvar = !mt.HasModifier(ICodeConstants.Acc_Static);
MethodDescriptor md = MethodDescriptor.ParseDescriptor(mt.GetDescriptor());
int paramcount = [email protected] + (thisvar ? 1 : 0);
int varindex = 0;
SFormsFastMapDirect map = new SFormsFastMapDirect();
for (int i = 0; i < paramcount; i++)
{
int version = GetNextFreeVersion(varindex, root);
// == 1
FastSparseSetFactory <int> .FastSparseSet <int> set = factory.SpawnEmptySet();
set.Add(version);
map.Put(varindex, set);
ssuversions.CreateNode(new VarVersionPair(varindex, version));
if (thisvar)
{
if (i == 0)
{
varindex++;
}
else
{
varindex += md.@params[i - 1].stackSize;
}
}
else
{
varindex += md.@params[i].stackSize;
}
}
return(map);
}
private void SetCurrentVar(SFormsFastMapDirect varmap, int?var, int vers)
{
FastSparseSetFactory <int> .FastSparseSet <int> set = factory.SpawnEmptySet();
set.Add(vers);
if (var.HasValue)
{
varmap.Put(var.Value, set);
}
}
// vers.size() == 0 means uninitialized variable, which is impossible
private void CreateOrUpdatePhiNode(VarVersionPair phivar, FastSparseSetFactory <int> .FastSparseSet <int> vers, Statement stat)
{
FastSparseSetFactory <int> .FastSparseSet <int> versCopy = vers.GetCopy();
HashSet <int> phiVers = new HashSet <int>();
// take into account the corresponding mm/pp node if existing
int ppvers = phantomppnodes.ContainsKey(phivar) ? phantomppnodes.GetOrNull(phivar
).version : -1;
// ssu graph
VarVersionNode phinode = ssuversions.nodes.GetWithKey(phivar);
List <VarVersionEdge> lstPreds = new List <VarVersionEdge>(phinode.preds);
if (lstPreds.Count == 1)
{
// not yet a phi node
VarVersionEdge edge = lstPreds[0];
edge.source.RemoveSuccessor(edge);
phinode.RemovePredecessor(edge);
}
else
{
foreach (VarVersionEdge edge in lstPreds)
{
int verssrc = new Sharpen.EnumeratorAdapter <VarVersionEdge>(edge.source.preds.GetEnumerator()).Next().source.version;
if (!vers.Contains(verssrc) && verssrc != ppvers)
{
edge.source.RemoveSuccessor(edge);
phinode.RemovePredecessor(edge);
}
else
{
versCopy.Remove(verssrc);
phiVers.Add(verssrc);
}
}
}
List <VarVersionNode> colnodes = new List <VarVersionNode>();
List <VarVersionPair> colpaars = new List <VarVersionPair>();
foreach (int ver in versCopy)
{
VarVersionNode prenode = ssuversions.nodes.GetWithKey(new VarVersionPair(phivar.var
, ver));
int tempver = GetNextFreeVersion(phivar.var, stat);
VarVersionNode tempnode = new VarVersionNode(phivar.var, tempver);
colnodes.Add(tempnode);
colpaars.Add(new VarVersionPair(phivar.var, tempver));
VarVersionEdge edge = new VarVersionEdge(VarVersionEdge.Edge_General, prenode, tempnode
);
prenode.AddSuccessor(edge);
tempnode.AddPredecessor(edge);
edge = new VarVersionEdge(VarVersionEdge.Edge_General, tempnode, phinode);
tempnode.AddSuccessor(edge);
phinode.AddPredecessor(edge);
phiVers.Add(tempver);
}
ssuversions.AddNodes(colnodes, colpaars);
}
private static bool IsVersionToBeReplaced(VarVersionPair usedvar, Dictionary <int
, HashSet <VarVersionPair> > mapVars, SSAUConstructorSparseEx ssau, VarVersionPair
leftpaar)
{
VarVersionsGraph ssuversions = ssau.GetSsuversions();
SFormsFastMapDirect mapLiveVars = ssau.GetLiveVarVersionsMap(usedvar);
if (mapLiveVars == null)
{
// dummy version, predecessor of a phi node
return(false);
}
// compare protected ranges
if (!InterpreterUtil.EqualObjects(ssau.GetMapVersionFirstRange().GetOrNullable(leftpaar
), ssau.GetMapVersionFirstRange().GetOrNullable(usedvar)))
{
return(false);
}
foreach (KeyValuePair <int, HashSet <VarVersionPair> > ent in mapVars)
{
FastSparseSetFactory <int> .FastSparseSet <int> liveverset = mapLiveVars.Get(ent.Key);
if (liveverset == null)
{
return(false);
}
HashSet <VarVersionNode> domset = new HashSet <VarVersionNode>();
foreach (VarVersionPair verpaar in ent.Value)
{
domset.Add(ssuversions.nodes.GetWithKey(verpaar));
}
bool isdom = false;
foreach (int livever in liveverset)
{
VarVersionNode node = ssuversions.nodes.GetWithKey(new VarVersionPair(ent.Key, livever
));
if (ssuversions.IsDominatorSet(node, domset))
{
isdom = true;
break;
}
}
if (!isdom)
{
return(false);
}
}
return(true);
}
private static void ReplaceSingleVar(Exprent parent, VarExprent var, Exprent dest
, SSAUConstructorSparseEx ssau)
{
parent.ReplaceExprent(var, dest);
// live sets
SFormsFastMapDirect livemap = ssau.GetLiveVarVersionsMap(new VarVersionPair(var));
HashSet <VarVersionPair> setVars = GetAllVersions(dest);
foreach (VarVersionPair varpaar in setVars)
{
VarVersionNode node = ssau.GetSsuversions().nodes.GetWithKey(varpaar);
var toRemove = new List <KeyValuePair <int, FastSparseSetFactory <int> .FastSparseSet <int> > >();
var entryList = node.live.EntryList();
for (var index = 0; index < entryList.Count; index++)
{
var itent = entryList[index];
KeyValuePair <int, FastSparseSetFactory <int> .FastSparseSet <int> > ent =
entryList.ElementAtOrDefault(index + 1);
if (ent.Value == null)
{
break;
}
int key = ent.Key;
if (!livemap.ContainsKey(key))
{
toRemove.Add(itent);
}
else
{
FastSparseSetFactory <int> .FastSparseSet <int> set = ent.Value;
set.Complement(livemap.Get(key));
if (set.IsEmpty())
{
toRemove.Add(itent);
}
}
}
foreach (var keyValuePair in toRemove)
{
node.live.PutInternal(keyValuePair.Key, keyValuePair.Value, true);
// entryList.RemoveAll(c => c.Key == keyValuePair.Key);
}
}
}
private SFormsFastMapDirect GetFilteredOutMap(string nodeid, string predid, DirectGraph
dgraph, string destid)
{
SFormsFastMapDirect mapNew = new SFormsFastMapDirect();
bool isFinallyExit = dgraph.mapShortRangeFinallyPaths.ContainsKey(predid);
if (nodeid.Equals(dgraph.mapNegIfBranch.GetOrNull(predid)))
{
if (outNegVarVersions.ContainsKey(predid))
{
mapNew = outNegVarVersions.GetOrNull(predid).GetCopy();
}
}
else if (outVarVersions.ContainsKey(predid))
{
mapNew = outVarVersions.GetOrNull(predid).GetCopy();
}
if (isFinallyExit)
{
SFormsFastMapDirect mapNewTemp = mapNew.GetCopy();
SFormsFastMapDirect mapTrueSource = new SFormsFastMapDirect();
string exceptionDest = dgraph.mapFinallyMonitorExceptionPathExits.GetOrNull(predid
);
bool isExceptionMonitorExit = (exceptionDest != null && !nodeid.Equals(exceptionDest
));
HashSet <string> setLongPathWrapper = new HashSet <string>();
foreach (List <FlattenStatementsHelper.FinallyPathWrapper> lstwrapper in dgraph.mapLongRangeFinallyPaths
.Values)
{
foreach (FlattenStatementsHelper.FinallyPathWrapper finwraplong in lstwrapper)
{
setLongPathWrapper.Add(finwraplong.destination + "##" + finwraplong.source);
}
}
foreach (FlattenStatementsHelper.FinallyPathWrapper finwrap in dgraph.mapShortRangeFinallyPaths
.GetOrNull(predid))
{
SFormsFastMapDirect map;
bool recFinally = dgraph.mapShortRangeFinallyPaths.ContainsKey(finwrap.source);
if (recFinally)
{
// recursion
map = GetFilteredOutMap(finwrap.entry, finwrap.source, dgraph, destid);
}
else if (finwrap.entry.Equals(dgraph.mapNegIfBranch.GetOrNull(finwrap.source)))
{
map = outNegVarVersions.GetOrNull(finwrap.source);
}
else
{
map = outVarVersions.GetOrNull(finwrap.source);
}
// false path?
bool isFalsePath;
if (recFinally)
{
isFalsePath = !finwrap.destination.Equals(nodeid);
}
else
{
isFalsePath = !setLongPathWrapper.Contains(destid + "##" + finwrap.source);
}
if (isFalsePath)
{
mapNewTemp.Complement(map);
}
else if (mapTrueSource.IsEmpty())
{
if (map != null)
{
mapTrueSource = map.GetCopy();
}
}
else
{
MergeMaps(mapTrueSource, map);
}
}
if (isExceptionMonitorExit)
{
mapNew = mapTrueSource;
}
else
{
mapNewTemp.Union(mapTrueSource);
mapNew.Intersection(mapNewTemp);
if (!mapTrueSource.IsEmpty() && !mapNew.IsEmpty())
{
// FIXME: what for??
// replace phi versions with corresponding phantom ones
Dictionary <VarVersionPair, VarVersionPair> mapPhantom = phantomexitnodes.GetOrNull
(predid);
if (mapPhantom == null)
{
mapPhantom = new Dictionary <VarVersionPair, VarVersionPair>();
}
SFormsFastMapDirect mapExitVar = mapNew.GetCopy();
mapExitVar.Complement(mapTrueSource);
foreach (KeyValuePair <int, FastSparseSetFactory <int> .FastSparseSet <int> > ent in mapExitVar
.EntryList())
{
foreach (int version in ent.Value)
{
int varindex = ent.Key;
VarVersionPair exitvar = new VarVersionPair(varindex, version);
FastSparseSetFactory <int> .FastSparseSet <int> newSet = mapNew.Get(varindex);
// remove the actual exit version
newSet.Remove(version);
// get or create phantom version
VarVersionPair phantomvar = mapPhantom.GetOrNull(exitvar);
if (phantomvar == null)
{
int newversion = GetNextFreeVersion(exitvar.var, null);
phantomvar = new VarVersionPair(exitvar.var, newversion);
VarVersionNode exitnode = ssuversions.nodes.GetWithKey(exitvar);
VarVersionNode phantomnode = ssuversions.CreateNode(phantomvar);
phantomnode.flags |= VarVersionNode.Flag_Phantom_Finexit;
VarVersionEdge edge = new VarVersionEdge(VarVersionEdge.Edge_Phantom, exitnode, phantomnode
);
exitnode.AddSuccessor(edge);
phantomnode.AddPredecessor(edge);
Sharpen.Collections.Put(mapPhantom, exitvar, phantomvar);
}
// add phantom version
newSet.Add(phantomvar.version);
}
}
if (!(mapPhantom.Count == 0))
{
Sharpen.Collections.Put(phantomexitnodes, predid, mapPhantom);
}
}
}
}
return(mapNew);
}
private void ProcessExprent(Exprent expr, SFormsFastMapDirect[] varmaparr, Statement
stat, bool calcLiveVars)
{
if (expr == null)
{
return;
}
VarExprent varassign = null;
bool finished = false;
switch (expr.type)
{
case Exprent.Exprent_Assignment:
{
AssignmentExprent assexpr = (AssignmentExprent)expr;
if (assexpr.GetCondType() == AssignmentExprent.Condition_None)
{
Exprent dest = assexpr.GetLeft();
if (dest.type == Exprent.Exprent_Var)
{
varassign = (VarExprent)dest;
}
}
break;
}
case Exprent.Exprent_Function:
{
FunctionExprent func = (FunctionExprent)expr;
switch (func.GetFuncType())
{
case FunctionExprent.Function_Iif:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr, stat, calcLiveVars);
SFormsFastMapDirect varmapFalse;
if (varmaparr[1] == null)
{
varmapFalse = new SFormsFastMapDirect(varmaparr[0]);
}
else
{
varmapFalse = varmaparr[1];
varmaparr[1] = null;
}
ProcessExprent(func.GetLstOperands()[1], varmaparr, stat, calcLiveVars);
SFormsFastMapDirect[] varmaparrNeg = new SFormsFastMapDirect[] { varmapFalse, null };
ProcessExprent(func.GetLstOperands()[2], varmaparrNeg, stat, calcLiveVars);
MergeMaps(varmaparr[0], varmaparrNeg[0]);
varmaparr[1] = null;
finished = true;
break;
}
case FunctionExprent.Function_Cadd:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr, stat, calcLiveVars);
SFormsFastMapDirect[] varmaparrAnd = new SFormsFastMapDirect[] { new SFormsFastMapDirect
(varmaparr[0]), null };
ProcessExprent(func.GetLstOperands()[1], varmaparrAnd, stat, calcLiveVars);
// false map
varmaparr[1] = MergeMaps(varmaparr[varmaparr[1] == null ? 0 : 1], varmaparrAnd[varmaparrAnd
[1] == null ? 0 : 1]);
// true map
varmaparr[0] = varmaparrAnd[0];
finished = true;
break;
}
case FunctionExprent.Function_Cor:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr, stat, calcLiveVars);
SFormsFastMapDirect[] varmaparrOr = new SFormsFastMapDirect[] { new SFormsFastMapDirect
(varmaparr[varmaparr[1] == null ? 0 : 1]), null };
ProcessExprent(func.GetLstOperands()[1], varmaparrOr, stat, calcLiveVars);
// false map
varmaparr[1] = varmaparrOr[varmaparrOr[1] == null ? 0 : 1];
// true map
varmaparr[0] = MergeMaps(varmaparr[0], varmaparrOr[0]);
finished = true;
break;
}
}
break;
}
}
if (!finished)
{
List <Exprent> lst = expr.GetAllExprents();
lst.Remove(varassign);
foreach (Exprent ex in lst)
{
ProcessExprent(ex, varmaparr, stat, calcLiveVars);
}
}
SFormsFastMapDirect varmap = varmaparr[0];
// field access
if (expr.type == Exprent.Exprent_Field)
{
int?index;
if (mapFieldVars.ContainsKey(expr.id))
{
index = mapFieldVars.GetOrNullable(expr.id);
}
else
{
index = fieldvarcounter--;
Sharpen.Collections.Put(mapFieldVars, expr.id, index);
// ssu graph
ssuversions.CreateNode(new VarVersionPair(index, 1));
}
SetCurrentVar(varmap, index, 1);
}
else if (expr.type == Exprent.Exprent_Invocation || (expr.type == Exprent.Exprent_Assignment &&
((AssignmentExprent)expr).GetLeft().type == Exprent.Exprent_Field) || (expr.
type == Exprent.Exprent_New && ((NewExprent)expr).GetNewType().type == ICodeConstants
.Type_Object) || expr.type == Exprent.Exprent_Function)
{
bool ismmpp = true;
if (expr.type == Exprent.Exprent_Function)
{
ismmpp = false;
FunctionExprent fexpr = (FunctionExprent)expr;
if (fexpr.GetFuncType() >= FunctionExprent.Function_Imm && fexpr.GetFuncType() <=
FunctionExprent.Function_Ppi)
{
if (fexpr.GetLstOperands()[0].type == Exprent.Exprent_Field)
{
ismmpp = true;
}
}
}
if (ismmpp)
{
varmap.RemoveAllFields();
}
}
if (varassign != null)
{
int varindex = varassign.GetIndex();
if (varassign.GetVersion() == 0)
{
// get next version
int nextver = GetNextFreeVersion(varindex, stat);
// set version
varassign.SetVersion(nextver);
// ssu graph
ssuversions.CreateNode(new VarVersionPair(varindex, nextver));
SetCurrentVar(varmap, varindex, nextver);
}
else
{
if (calcLiveVars)
{
VarMapToGraph(new VarVersionPair(varindex, varassign.GetVersion()), varmap);
}
SetCurrentVar(varmap, varindex, varassign.GetVersion());
}
}
else if (expr.type == Exprent.Exprent_Function)
{
// MM or PP function
FunctionExprent func_1 = (FunctionExprent)expr;
switch (func_1.GetFuncType())
{
case FunctionExprent.Function_Imm:
case FunctionExprent.Function_Mmi:
case FunctionExprent.Function_Ipp:
case FunctionExprent.Function_Ppi:
{
if (func_1.GetLstOperands()[0].type == Exprent.Exprent_Var)
{
VarExprent var = (VarExprent)func_1.GetLstOperands()[0];
int varindex = var.GetIndex();
VarVersionPair varpaar = new VarVersionPair(varindex, var.GetVersion());
// ssu graph
VarVersionPair phantomver = phantomppnodes.GetOrNull(varpaar);
if (phantomver == null)
{
// get next version
int nextver = GetNextFreeVersion(varindex, null);
phantomver = new VarVersionPair(varindex, nextver);
//ssuversions.createOrGetNode(phantomver);
ssuversions.CreateNode(phantomver);
VarVersionNode vernode = ssuversions.nodes.GetWithKey(varpaar);
FastSparseSetFactory <int> .FastSparseSet <int> vers = factory.SpawnEmptySet();
if (vernode.preds.Count == 1)
{
vers.Add(new Sharpen.EnumeratorAdapter <VarVersionEdge>(vernode.preds.GetEnumerator()).Next().source.version);
}
else
{
foreach (VarVersionEdge edge in vernode.preds)
{
vers.Add(new Sharpen.EnumeratorAdapter <VarVersionEdge>(edge.source.preds.GetEnumerator()).Next().source.version);
}
}
vers.Add(nextver);
CreateOrUpdatePhiNode(varpaar, vers, stat);
Sharpen.Collections.Put(phantomppnodes, varpaar, phantomver);
}
if (calcLiveVars)
{
VarMapToGraph(varpaar, varmap);
}
SetCurrentVar(varmap, varindex, var.GetVersion());
}
break;
}
}
}
else if (expr.type == Exprent.Exprent_Var)
{
VarExprent vardest = (VarExprent)expr;
int varindex = vardest.GetIndex();
int current_vers = vardest.GetVersion();
FastSparseSetFactory <int> .FastSparseSet <int> vers = varmap.Get(varindex);
int cardinality = vers.GetCardinality();
if (cardinality == 1)
{
// size == 1
if (current_vers != 0)
{
if (calcLiveVars)
{
VarMapToGraph(new VarVersionPair(varindex, current_vers), varmap);
}
SetCurrentVar(varmap, varindex, current_vers);
}
else
{
// split last version
int usever = GetNextFreeVersion(varindex, stat);
// set version
vardest.SetVersion(usever);
SetCurrentVar(varmap, varindex, usever);
// ssu graph
int lastver = new Sharpen.EnumeratorAdapter <int>(vers.GetEnumerator()).Next();
VarVersionNode prenode = ssuversions.nodes.GetWithKey(new VarVersionPair(varindex
, lastver));
VarVersionNode usenode = ssuversions.CreateNode(new VarVersionPair(varindex, usever
));
VarVersionEdge edge = new VarVersionEdge(VarVersionEdge.Edge_General, prenode, usenode
);
prenode.AddSuccessor(edge);
usenode.AddPredecessor(edge);
}
}
else if (cardinality == 2)
{
// size > 1
if (current_vers != 0)
{
if (calcLiveVars)
{
VarMapToGraph(new VarVersionPair(varindex, current_vers), varmap);
}
SetCurrentVar(varmap, varindex, current_vers);
}
else
{
// split version
int usever = GetNextFreeVersion(varindex, stat);
// set version
vardest.SetVersion(usever);
// ssu node
ssuversions.CreateNode(new VarVersionPair(varindex, usever));
SetCurrentVar(varmap, varindex, usever);
current_vers = usever;
}
CreateOrUpdatePhiNode(new VarVersionPair(varindex, current_vers), vers, stat);
}
}
}
private void ProcessExprent(Exprent expr, SFormsFastMapDirect[] varmaparr)
{
if (expr == null)
{
return;
}
VarExprent varassign = null;
bool finished = false;
switch (expr.type)
{
case Exprent.Exprent_Assignment:
{
AssignmentExprent assexpr = (AssignmentExprent)expr;
if (assexpr.GetCondType() == AssignmentExprent.Condition_None)
{
Exprent dest = assexpr.GetLeft();
if (dest.type == Exprent.Exprent_Var)
{
varassign = (VarExprent)dest;
}
}
break;
}
case Exprent.Exprent_Function:
{
FunctionExprent func = (FunctionExprent)expr;
switch (func.GetFuncType())
{
case FunctionExprent.Function_Iif:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr);
SFormsFastMapDirect varmapFalse;
if (varmaparr[1] == null)
{
varmapFalse = new SFormsFastMapDirect(varmaparr[0]);
}
else
{
varmapFalse = varmaparr[1];
varmaparr[1] = null;
}
ProcessExprent(func.GetLstOperands()[1], varmaparr);
SFormsFastMapDirect[] varmaparrNeg = new SFormsFastMapDirect[] { varmapFalse, null };
ProcessExprent(func.GetLstOperands()[2], varmaparrNeg);
MergeMaps(varmaparr[0], varmaparrNeg[0]);
varmaparr[1] = null;
finished = true;
break;
}
case FunctionExprent.Function_Cadd:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr);
SFormsFastMapDirect[] varmaparrAnd = new SFormsFastMapDirect[] { new SFormsFastMapDirect
(varmaparr[0]), null };
ProcessExprent(func.GetLstOperands()[1], varmaparrAnd);
// false map
varmaparr[1] = MergeMaps(varmaparr[varmaparr[1] == null ? 0 : 1], varmaparrAnd[varmaparrAnd
[1] == null ? 0 : 1]);
// true map
varmaparr[0] = varmaparrAnd[0];
finished = true;
break;
}
case FunctionExprent.Function_Cor:
{
ProcessExprent(func.GetLstOperands()[0], varmaparr);
SFormsFastMapDirect[] varmaparrOr = new SFormsFastMapDirect[] { new SFormsFastMapDirect
(varmaparr[varmaparr[1] == null ? 0 : 1]), null };
ProcessExprent(func.GetLstOperands()[1], varmaparrOr);
// false map
varmaparr[1] = varmaparrOr[varmaparrOr[1] == null ? 0 : 1];
// true map
varmaparr[0] = MergeMaps(varmaparr[0], varmaparrOr[0]);
finished = true;
break;
}
}
break;
}
}
if (finished)
{
return;
}
List <Exprent> lst = expr.GetAllExprents();
lst.Remove(varassign);
foreach (Exprent ex in lst)
{
ProcessExprent(ex, varmaparr);
}
SFormsFastMapDirect varmap = varmaparr[0];
if (varassign != null)
{
int varindex = varassign.GetIndex();
if (varassign.GetVersion() == 0)
{
// get next version
int nextver = GetNextFreeVersion(varindex);
// set version
varassign.SetVersion(nextver);
SetCurrentVar(varmap, varindex, nextver);
}
else
{
SetCurrentVar(varmap, varindex, varassign.GetVersion());
}
}
else if (expr.type == Exprent.Exprent_Var)
{
VarExprent vardest = (VarExprent)expr;
int varindex = vardest.GetIndex();
FastSparseSetFactory <int> .FastSparseSet <int> vers = varmap.Get(varindex);
int cardinality = vers.GetCardinality();
if (cardinality == 1)
{
// == 1
// set version
int it = new Sharpen.EnumeratorAdapter <int>(vers.GetEnumerator()).Next();
vardest.SetVersion(it);
}
else if (cardinality == 2)
{
// size > 1
int current_vers = vardest.GetVersion();
VarVersionPair currpaar = new VarVersionPair(varindex, current_vers);
if (current_vers != 0 && phi.ContainsKey(currpaar))
{
SetCurrentVar(varmap, varindex, current_vers);
// update phi node
phi.GetOrNull(currpaar).Union(vers);
}
else
{
// increase version
int nextver = GetNextFreeVersion(varindex);
// set version
vardest.SetVersion(nextver);
SetCurrentVar(varmap, varindex, nextver);
// create new phi node
Sharpen.Collections.Put(phi, new VarVersionPair(varindex, nextver), vers);
}
}
}
}
