private static bool CollapseInlinedClass14(Statement stat)
{
bool ret = class14Builder.Match(stat);
if (ret)
{
string class_name = (string)class14Builder.GetVariableValue("$classname$");
AssignmentExprent assignment = (AssignmentExprent)class14Builder.GetVariableValue
("$assignfield$");
FieldExprent fieldExpr = (FieldExprent)class14Builder.GetVariableValue("$field$");
assignment.ReplaceExprent(assignment.GetRight(), new ConstExprent(VarType.Vartype_Class
, class_name, null));
List <Exprent> data = new List <Exprent>(stat.GetFirst().GetExprents());
stat.SetExprents(data);
SequenceHelper.DestroyAndFlattenStatement(stat);
ClassWrapper wrapper = (ClassWrapper)DecompilerContext.GetProperty(DecompilerContext
.Current_Class_Wrapper);
if (wrapper != null)
{
wrapper.GetHiddenMembers().Add(InterpreterUtil.MakeUniqueKey(fieldExpr.GetName(),
fieldExpr.GetDescriptor().descriptorString));
}
}
return(ret);
}
public static void EnhanceLoops(Statement root)
{
while (EnhanceLoopsRec(root))
{
}
/**/
SequenceHelper.CondenseSequences(root);
}
public static bool ExtractLoops(Statement root)
{
bool res = (ExtractLoopsRec(root) != 0);
if (res)
{
SequenceHelper.CondenseSequences(root);
}
return(res);
}
public static bool MergeAllIfs(RootStatement root)
{
bool res = MergeAllIfsRec(root, new HashSet <int>());
if (res)
{
SequenceHelper.CondenseSequences(root);
}
return(res);
}
public static bool InlineSingleBlocks(RootStatement root)
{
bool res = InlineSingleBlocksRec(root);
if (res)
{
SequenceHelper.CondenseSequences(root);
}
return(res);
}
public static bool CondenseExits(RootStatement root)
{
int changed = IntegrateExits(root);
if (changed > 0)
{
CleanUpUnreachableBlocks(root);
SequenceHelper.CondenseSequences(root);
}
return(changed > 0);
}
public static RootStatement ParseGraph(ControlFlowGraph graph)
{
RootStatement root = GraphToStatement(graph);
if (!ProcessStatement(root, new Dictionary <int, HashSet <int> >()))
{
// try {
// DotExporter.toDotFile(root.getFirst().getStats().get(13), new File("c:\\Temp\\stat1.dot"));
// } catch (Exception ex) {
// ex.printStackTrace();
// }
throw new Exception("parsing failure!");
}
LabelHelper.LowContinueLabels(root, new HashSet <StatEdge>());
SequenceHelper.CondenseSequences(root);
root.BuildMonitorFlags();
// build synchronized statements
BuildSynchronized(root);
return(root);
}
public virtual void SimplifyStackVars(RootStatement root, StructMethod mt, StructClass
cl)
{
HashSet <int> setReorderedIfs = new HashSet <int>();
SSAUConstructorSparseEx ssau = null;
while (true)
{
bool found = false;
SSAConstructorSparseEx ssa = new SSAConstructorSparseEx();
ssa.SplitVariables(root, mt);
SimplifyExprentsHelper sehelper = new SimplifyExprentsHelper(ssau == null);
while (sehelper.SimplifyStackVarsStatement(root, setReorderedIfs, ssa, cl))
{
found = true;
}
SetVersionsToNull(root);
SequenceHelper.CondenseSequences(root);
ssau = new SSAUConstructorSparseEx();
ssau.SplitVariables(root, mt);
if (IterateStatements(root, ssau))
{
found = true;
}
SetVersionsToNull(root);
if (!found)
{
break;
}
}
// remove unused assignments
ssau = new SSAUConstructorSparseEx();
ssau.SplitVariables(root, mt);
IterateStatements(root, ssau);
SetVersionsToNull(root);
}
private static bool BuildIff(Statement stat, SSAConstructorSparseEx ssa)
{
if (stat.type == Statement.Type_If && stat.GetExprents() == null)
{
IfStatement statement = (IfStatement)stat;
Exprent ifHeadExpr = statement.GetHeadexprent();
HashSet <int> ifHeadExprBytecode = (ifHeadExpr == null ? null : ifHeadExpr.bytecode
);
if (statement.iftype == IfStatement.Iftype_Ifelse)
{
Statement ifStatement = statement.GetIfstat();
Statement elseStatement = statement.GetElsestat();
if (ifStatement.GetExprents() != null && ifStatement.GetExprents().Count == 1 &&
elseStatement.GetExprents() != null && elseStatement.GetExprents().Count == 1 &&
ifStatement.GetAllSuccessorEdges().Count == 1 && elseStatement.GetAllSuccessorEdges
().Count == 1 && ifStatement.GetAllSuccessorEdges()[0].GetDestination() == elseStatement
.GetAllSuccessorEdges()[0].GetDestination())
{
Exprent ifExpr = ifStatement.GetExprents()[0];
Exprent elseExpr = elseStatement.GetExprents()[0];
if (ifExpr.type == Exprent.Exprent_Assignment && elseExpr.type == Exprent.Exprent_Assignment)
{
AssignmentExprent ifAssign = (AssignmentExprent)ifExpr;
AssignmentExprent elseAssign = (AssignmentExprent)elseExpr;
if (ifAssign.GetLeft().type == Exprent.Exprent_Var && elseAssign.GetLeft().type ==
Exprent.Exprent_Var)
{
VarExprent ifVar = (VarExprent)ifAssign.GetLeft();
VarExprent elseVar = (VarExprent)elseAssign.GetLeft();
if (ifVar.GetIndex() == elseVar.GetIndex() && ifVar.IsStack())
{
// ifVar.getIndex() >= VarExprent.STACK_BASE) {
bool found = false;
foreach (KeyValuePair <VarVersionPair, FastSparseSetFactory <int> .FastSparseSet <int> > ent
in ssa.GetPhi())
{
if (ent.Key.var == ifVar.GetIndex())
{
if (ent.Value.Contains(ifVar.GetVersion()) && ent.Value.Contains(elseVar.GetVersion
()))
{
found = true;
break;
}
}
}
if (found)
{
List <Exprent> data = new List <Exprent>(statement.GetFirst().GetExprents());
List <Exprent> operands = Sharpen.Arrays.AsList(statement.GetHeadexprent().GetCondition
(), ifAssign.GetRight(), elseAssign.GetRight());
data.Add(new AssignmentExprent(ifVar, new FunctionExprent(FunctionExprent.Function_Iif
, operands, ifHeadExprBytecode), ifHeadExprBytecode));
statement.SetExprents(data);
if ((statement.GetAllSuccessorEdges().Count == 0))
{
StatEdge ifEdge = ifStatement.GetAllSuccessorEdges()[0];
StatEdge edge = new StatEdge(ifEdge.GetType(), statement, ifEdge.GetDestination()
);
statement.AddSuccessor(edge);
if (ifEdge.closure != null)
{
ifEdge.closure.AddLabeledEdge(edge);
}
}
SequenceHelper.DestroyAndFlattenStatement(statement);
return(true);
}
}
}
}
else if (ifExpr.type == Exprent.Exprent_Exit && elseExpr.type == Exprent.Exprent_Exit)
{
ExitExprent ifExit = (ExitExprent)ifExpr;
ExitExprent elseExit = (ExitExprent)elseExpr;
if (ifExit.GetExitType() == elseExit.GetExitType() && ifExit.GetValue() != null &&
elseExit.GetValue() != null && ifExit.GetExitType() == ExitExprent.Exit_Return)
{
// throw is dangerous, because of implicit casting to a common superclass
// e.g. throws IOException and throw true?new RuntimeException():new IOException(); won't work
if (ifExit.GetExitType() == ExitExprent.Exit_Throw && !ifExit.GetValue().GetExprType
().Equals(elseExit.GetValue().GetExprType()))
{
// note: getExprType unreliable at this point!
return(false);
}
// avoid flattening to 'iff' if any of the branches is an 'iff' already
if (IsIff(ifExit.GetValue()) || IsIff(elseExit.GetValue()))
{
return(false);
}
List <Exprent> data = new List <Exprent>(statement.GetFirst().GetExprents());
data.Add(new ExitExprent(ifExit.GetExitType(), new FunctionExprent(FunctionExprent
.Function_Iif, Sharpen.Arrays.AsList(statement.GetHeadexprent().GetCondition(),
ifExit.GetValue(), elseExit.GetValue()), ifHeadExprBytecode), ifExit.GetRetType(
), ifHeadExprBytecode));
statement.SetExprents(data);
StatEdge retEdge = ifStatement.GetAllSuccessorEdges()[0];
Statement closure = retEdge.closure == statement?statement.GetParent() : retEdge
.closure;
statement.AddSuccessor(new StatEdge(StatEdge.Type_Break, statement, retEdge.GetDestination
(), closure));
SequenceHelper.DestroyAndFlattenStatement(statement);
return(true);
}
}
}
}
}
return(false);
}
