private static Exprent IsPPIorMMI(Exprent first)
{
if (first.type == Exprent.Exprent_Assignment)
{
AssignmentExprent @as = (AssignmentExprent)first;
if (@as.GetRight().type == Exprent.Exprent_Function)
{
FunctionExprent func = (FunctionExprent)@as.GetRight();
if (func.GetFuncType() == FunctionExprent.Function_Add || func.GetFuncType() == FunctionExprent
.Function_Sub)
{
Exprent econd = func.GetLstOperands()[0];
Exprent econst = func.GetLstOperands()[1];
if (econst.type != Exprent.Exprent_Const && econd.type == Exprent.Exprent_Const &&
func.GetFuncType() == FunctionExprent.Function_Add)
{
econd = econst;
econst = func.GetLstOperands()[0];
}
if (econst.type == Exprent.Exprent_Const && ((ConstExprent)econst).HasValueOne())
{
Exprent left = @as.GetLeft();
if (left.type != Exprent.Exprent_Var && left.Equals(econd))
{
int type = func.GetFuncType() == FunctionExprent.Function_Add ? FunctionExprent.Function_Ppi
: FunctionExprent.Function_Mmi;
FunctionExprent ret = new FunctionExprent(type, econd, func.bytecode);
ret.SetImplicitType(VarType.Vartype_Int);
return(ret);
}
}
}
}
}
return(null);
}
private Exprent ProcessExprentRecursive(Exprent exprent)
{
bool replaced = true;
while (replaced)
{
replaced = false;
foreach (Exprent expr in exprent.GetAllExprents())
{
Exprent retexpr = ProcessExprentRecursive(expr);
if (retexpr != null)
{
exprent.ReplaceExprent(expr, retexpr);
replaced = true;
exprentReplaced = true;
break;
}
}
}
if (exprent.type == Exprent.Exprent_Assignment)
{
AssignmentExprent @as = (AssignmentExprent)exprent;
if (@as.GetRight().type == Exprent.Exprent_Function)
{
FunctionExprent func = (FunctionExprent)@as.GetRight();
VarType midlayer = null;
if (func.GetFuncType() >= FunctionExprent.Function_I2l && func.GetFuncType() <= FunctionExprent
.Function_I2s)
{
midlayer = func.GetSimpleCastType();
if (func.GetLstOperands()[0].type == Exprent.Exprent_Function)
{
func = (FunctionExprent)func.GetLstOperands()[0];
}
else
{
return(null);
}
}
if (func.GetFuncType() == FunctionExprent.Function_Add || func.GetFuncType() == FunctionExprent
.Function_Sub)
{
Exprent econd = func.GetLstOperands()[0];
Exprent econst = func.GetLstOperands()[1];
if (econst.type != Exprent.Exprent_Const && econd.type == Exprent.Exprent_Const &&
func.GetFuncType() == FunctionExprent.Function_Add)
{
econd = econst;
econst = func.GetLstOperands()[0];
}
if (econst.type == Exprent.Exprent_Const && ((ConstExprent)econst).HasValueOne())
{
Exprent left = @as.GetLeft();
VarType condtype = econd.GetExprType();
if (left.Equals(econd) && (midlayer == null || midlayer.Equals(condtype)))
{
FunctionExprent ret = new FunctionExprent(func.GetFuncType() == FunctionExprent.Function_Add
? FunctionExprent.Function_Ppi : FunctionExprent.Function_Mmi, econd, func.bytecode
);
ret.SetImplicitType(condtype);
exprentReplaced = true;
return(ret);
}
}
}
}
}
return(null);
}
private static object[] IterateChildExprent(Exprent exprent, Exprent parent, Exprent
next, Dictionary <VarVersionPair, Exprent> mapVarValues, SSAUConstructorSparseEx
ssau)
{
bool changed = false;
foreach (Exprent expr in exprent.GetAllExprents())
{
var oldExpr = expr;
while (true)
{
object[] arr = IterateChildExprent(oldExpr, parent, next, mapVarValues, ssau);
Exprent retexpr = (Exprent)arr[0];
changed |= (bool)arr[1];
bool isReplaceable = (bool)arr[2];
if (retexpr != null)
{
if (isReplaceable)
{
ReplaceSingleVar(exprent, (VarExprent)oldExpr, retexpr, ssau);
oldExpr = retexpr;
}
else
{
exprent.ReplaceExprent(oldExpr, retexpr);
}
changed = true;
}
if (!isReplaceable)
{
break;
}
}
}
Exprent dest = IsReplaceableVar(exprent, mapVarValues);
if (dest != null)
{
return(new object[] { dest, true, true });
}
VarExprent left = null;
Exprent right = null;
if (exprent.type == Exprent.Exprent_Assignment)
{
AssignmentExprent @as = (AssignmentExprent)exprent;
if (@as.GetLeft().type == Exprent.Exprent_Var)
{
left = (VarExprent)@as.GetLeft();
right = @as.GetRight();
}
}
if (left == null)
{
return(new object[] { null, changed, false });
}
bool isHeadSynchronized = false;
if (next == null && parent.type == Exprent.Exprent_Monitor)
{
MonitorExprent monexpr = (MonitorExprent)parent;
if (monexpr.GetMonType() == MonitorExprent.Monitor_Enter && exprent.Equals(monexpr
.GetValue()))
{
isHeadSynchronized = true;
}
}
// stack variable or synchronized head exprent
if (!left.IsStack() && !isHeadSynchronized)
{
return(new object[] { null, changed, false });
}
VarVersionPair leftpaar = new VarVersionPair(left);
List <VarVersionNode> usedVers = new List <VarVersionNode>();
bool notdom = GetUsedVersions(ssau, leftpaar, usedVers);
if (!notdom && (usedVers.Count == 0))
{
return(new object[] { right, changed, false });
}
// stack variables only
if (!left.IsStack())
{
return(new object[] { null, changed, false });
}
int useflags = right.GetExprentUse();
if ((useflags & Exprent.Both_Flags) != Exprent.Both_Flags)
{
return(new object[] { null, changed, false });
}
Dictionary <int, HashSet <VarVersionPair> > mapVars = GetAllVarVersions(leftpaar, right
, ssau);
if (mapVars.ContainsKey(leftpaar.var) && notdom)
{
return(new object[] { null, changed, false });
}
Sharpen.Collections.Remove(mapVars, leftpaar.var);
HashSet <VarVersionPair> setAllowedVars = GetAllVersions(parent);
if (next != null)
{
Sharpen.Collections.AddAll(setAllowedVars, GetAllVersions(next));
}
bool vernotreplaced = false;
HashSet <VarVersionPair> setTempUsedVers = new HashSet <VarVersionPair>();
foreach (VarVersionNode usedvar in usedVers)
{
VarVersionPair usedver = new VarVersionPair(usedvar.var, usedvar.version);
if (IsVersionToBeReplaced(usedver, mapVars, ssau, leftpaar) && (right.type == Exprent
.Exprent_Var || setAllowedVars.Contains(usedver)))
{
setTempUsedVers.Add(usedver);
}
else
{
vernotreplaced = true;
}
}
if (!notdom && !vernotreplaced)
{
foreach (VarVersionPair usedver in setTempUsedVers)
{
Exprent copy = right.Copy();
if (right.type == Exprent.Exprent_Field && ssau.GetMapFieldVars().ContainsKey(right
.id))
{
Sharpen.Collections.Put(ssau.GetMapFieldVars(), copy.id, ssau.GetMapFieldVars().GetOrNullable
(right.id));
}
Sharpen.Collections.Put(mapVarValues, usedver, copy);
}
// remove assignment
return(new object[] { right, changed, false });
}
return(new object[] { null, changed, false });
}
private static void ExtractDynamicInitializers(ClassWrapper wrapper)
{
StructClass cl = wrapper.GetClassStruct();
bool isAnonymous = DecompilerContext.GetClassProcessor().GetMapRootClasses().GetOrNull
(cl.qualifiedName).type == ClassesProcessor.ClassNode.Class_Anonymous;
List <List <Exprent> > lstFirst = new List <List <Exprent> >();
List <MethodWrapper> lstMethodWrappers = new List <MethodWrapper>();
foreach (MethodWrapper method in wrapper.GetMethods())
{
if (ICodeConstants.Init_Name.Equals(method.methodStruct.GetName()) && method.root
!= null)
{
// successfully decompiled constructor
Statement firstData = Statements.FindFirstData(method.root);
if (firstData == null || (firstData.GetExprents().Count == 0))
{
return;
}
lstFirst.Add(firstData.GetExprents());
lstMethodWrappers.Add(method);
Exprent exprent = firstData.GetExprents()[0];
if (!isAnonymous)
{
// FIXME: doesn't make sense
if (exprent.type != Exprent.Exprent_Invocation || !Statements.IsInvocationInitConstructor
((InvocationExprent)exprent, method, wrapper, false))
{
return;
}
}
}
}
if ((lstFirst.Count == 0))
{
return;
}
while (true)
{
string fieldWithDescr = null;
Exprent value = null;
for (int i = 0; i < lstFirst.Count; i++)
{
List <Exprent> lst = lstFirst[i];
if (lst.Count < (isAnonymous ? 1 : 2))
{
return;
}
Exprent exprent = lst[isAnonymous ? 0 : 1];
bool found = false;
if (exprent.type == Exprent.Exprent_Assignment)
{
AssignmentExprent assignExpr = (AssignmentExprent)exprent;
if (assignExpr.GetLeft().type == Exprent.Exprent_Field)
{
FieldExprent fExpr = (FieldExprent)assignExpr.GetLeft();
if (!fExpr.IsStatic() && fExpr.GetClassname().Equals(cl.qualifiedName) && cl.HasField
(fExpr.GetName(), fExpr.GetDescriptor().descriptorString))
{
// check for the physical existence of the field. Could be defined in a superclass.
if (IsExprentIndependent(assignExpr.GetRight(), lstMethodWrappers[i]))
{
string fieldKey = InterpreterUtil.MakeUniqueKey(fExpr.GetName(), fExpr.GetDescriptor
().descriptorString);
if (fieldWithDescr == null)
{
fieldWithDescr = fieldKey;
value = assignExpr.GetRight();
}
else if (!fieldWithDescr.Equals(fieldKey) || !value.Equals(assignExpr.GetRight()))
{
return;
}
found = true;
}
}
}
}
if (!found)
{
return;
}
}
if (!wrapper.GetDynamicFieldInitializers().ContainsKey(fieldWithDescr))
{
wrapper.GetDynamicFieldInitializers().AddWithKey(value, fieldWithDescr);
foreach (List <Exprent> lst in lstFirst)
{
lst.RemoveAtReturningValue(isAnonymous ? 0 : 1);
}
}
else
{
return;
}
}
}
private static bool RemoveReturnCheck(Statement stat, StructMethod mt)
{
Statement parent = stat.GetParent();
if (parent != null && parent.type == Statement.Type_If && stat.type == Statement.
Type_Basicblock && stat.GetExprents().Count == 1)
{
Exprent exprent = stat.GetExprents()[0];
if (exprent.type == Exprent.Exprent_Exit)
{
ExitExprent exit_exprent = (ExitExprent)exprent;
if (exit_exprent.GetExitType() == ExitExprent.Exit_Return)
{
Exprent exprent_value = exit_exprent.GetValue();
//if(exprent_value.type == Exprent.EXPRENT_VAR) {
// VarExprent var_value = (VarExprent)exprent_value;
IfStatement ifparent = (IfStatement)parent;
Exprent if_condition = ifparent.GetHeadexprent().GetCondition();
if (ifparent.GetElsestat() == stat && if_condition.type == Exprent.Exprent_Function &&
((FunctionExprent)if_condition).GetFuncType() == FunctionExprent.Function_Eq)
{
// TODO: reversed order possible (in theory)
FunctionExprent func = (FunctionExprent)if_condition;
Exprent first_param = func.GetLstOperands()[0];
Exprent second_param = func.GetLstOperands()[1];
StatEdge ifedge = ifparent.GetIfEdge();
StatEdge elseedge = ifparent.GetElseEdge();
Statement ifbranch = ifparent.GetIfstat();
Statement elsebranch = ifparent.GetElsestat();
if (second_param.type == Exprent.Exprent_Const && second_param.GetExprType().type
== ICodeConstants.Type_Null)
{
// TODO: reversed parameter order
//if(first_param.type == Exprent.EXPRENT_VAR && ((VarExprent)first_param).getIndex() == var_value.getIndex()) {
if (first_param.Equals(exprent_value))
{
// TODO: check for absence of side effects like method invocations etc.
if (ifbranch.type == Statement.Type_Basicblock && ifbranch.GetExprents().Count ==
1 && ifbranch.GetExprents()[0].type == Exprent.Exprent_Exit)
{
// TODO: special check for IllegalStateException
ifparent.GetFirst().RemoveSuccessor(ifedge);
ifparent.GetFirst().RemoveSuccessor(elseedge);
ifparent.GetStats().RemoveWithKey(ifbranch.id);
ifparent.GetStats().RemoveWithKey(elsebranch.id);
if (!(ifbranch.GetAllSuccessorEdges().Count == 0))
{
ifbranch.RemoveSuccessor(ifbranch.GetAllSuccessorEdges()[0]);
}
if (!(ifparent.GetFirst().GetExprents().Count == 0))
{
elsebranch.GetExprents().InsertRange(0, ifparent.GetFirst().GetExprents());
}
ifparent.GetParent().ReplaceStatement(ifparent, elsebranch);
ifparent.GetParent().SetAllParent();
return(true);
}
}
}
}
}
}
}
else if (parent != null && parent.type == Statement.Type_Sequence && stat.type ==
Statement.Type_Basicblock && stat.GetExprents().Count == 1)
{
//}
Exprent exprent = stat.GetExprents()[0];
if (exprent.type == Exprent.Exprent_Exit)
{
ExitExprent exit_exprent = (ExitExprent)exprent;
if (exit_exprent.GetExitType() == ExitExprent.Exit_Return)
{
Exprent exprent_value = exit_exprent.GetValue();
SequenceStatement sequence = (SequenceStatement)parent;
int sequence_stats_number = sequence.GetStats().Count;
if (sequence_stats_number > 1 && sequence.GetStats().GetLast() == stat && sequence
.GetStats()[sequence_stats_number - 2].type == Statement.Type_If)
{
IfStatement ifstat = (IfStatement)sequence.GetStats()[sequence_stats_number - 2];
Exprent if_condition = ifstat.GetHeadexprent().GetCondition();
if (ifstat.iftype == IfStatement.Iftype_If && if_condition.type == Exprent.Exprent_Function &&
((FunctionExprent)if_condition).GetFuncType() == FunctionExprent.Function_Eq)
{
// TODO: reversed order possible (in theory)
FunctionExprent func = (FunctionExprent)if_condition;
Exprent first_param = func.GetLstOperands()[0];
Exprent second_param = func.GetLstOperands()[1];
Statement ifbranch = ifstat.GetIfstat();
if (second_param.type == Exprent.Exprent_Const && second_param.GetExprType().type
== ICodeConstants.Type_Null)
{
// TODO: reversed parameter order
if (first_param.Equals(exprent_value))
{
// TODO: check for absence of side effects like method invocations etc.
if (ifbranch.type == Statement.Type_Basicblock && ifbranch.GetExprents().Count ==
1 && ifbranch.GetExprents()[0].type == Exprent.Exprent_Exit)
{
// TODO: special check for IllegalStateException
ifstat.RemoveSuccessor(ifstat.GetAllSuccessorEdges()[0]);
// remove 'else' edge
if (!(ifstat.GetFirst().GetExprents().Count == 0))
{
stat.GetExprents().InsertRange(0, ifstat.GetFirst().GetExprents());
}
foreach (StatEdge edge in ifstat.GetAllPredecessorEdges())
{
ifstat.RemovePredecessor(edge);
edge.GetSource().ChangeEdgeNode(Statement.Direction_Forward, edge, stat);
stat.AddPredecessor(edge);
}
sequence.GetStats().RemoveWithKey(ifstat.id);
sequence.SetFirst(sequence.GetStats()[0]);
return(true);
}
}
}
}
}
}
}
}
foreach (Statement st in stat.GetStats())
{
if (RemoveReturnCheck(st, mt))
{
return(true);
}
}
return(false);
}
private static Exprent IdentifySecondaryFunctions(Exprent exprent, bool statement_level
, VarProcessor varProc)
{
if (exprent.type == Exprent.Exprent_Function)
{
FunctionExprent fexpr = (FunctionExprent)exprent;
switch (fexpr.GetFuncType())
{
case FunctionExprent.Function_Bool_Not:
{
Exprent retparam = PropagateBoolNot(fexpr);
if (retparam != null)
{
return(retparam);
}
break;
}
case FunctionExprent.Function_Eq:
case FunctionExprent.Function_Ne:
case FunctionExprent.Function_Gt:
case FunctionExprent.Function_Ge:
case FunctionExprent.Function_Lt:
case FunctionExprent.Function_Le:
{
Exprent expr1 = fexpr.GetLstOperands()[0];
Exprent expr2 = fexpr.GetLstOperands()[1];
if (expr1.type == Exprent.Exprent_Const)
{
expr2 = expr1;
expr1 = fexpr.GetLstOperands()[1];
}
if (expr1.type == Exprent.Exprent_Function && expr2.type == Exprent.Exprent_Const)
{
FunctionExprent funcexpr = (FunctionExprent)expr1;
ConstExprent cexpr = (ConstExprent)expr2;
int functype = funcexpr.GetFuncType();
if (functype == FunctionExprent.Function_Lcmp || functype == FunctionExprent.Function_Fcmpg ||
functype == FunctionExprent.Function_Fcmpl || functype == FunctionExprent.Function_Dcmpg ||
functype == FunctionExprent.Function_Dcmpl)
{
int desttype = -1;
int?[] destcons = mapNumComparisons.GetOrNull(fexpr.GetFuncType());
if (destcons != null)
{
int index = cexpr.GetIntValue() + 1;
if (index >= 0 && index <= 2)
{
int?destcon = destcons[index];
if (destcon != null)
{
desttype = destcon.Value;
}
}
}
if (desttype >= 0)
{
return(new FunctionExprent(desttype, funcexpr.GetLstOperands(), funcexpr.bytecode
));
}
}
}
break;
}
}
}
bool replaced = true;
while (replaced)
{
replaced = false;
foreach (Exprent expr in exprent.GetAllExprents())
{
Exprent retexpr = IdentifySecondaryFunctions(expr, false, varProc);
if (retexpr != null)
{
exprent.ReplaceExprent(expr, retexpr);
replaced = true;
break;
}
}
}
switch (exprent.type)
{
case Exprent.Exprent_Function:
{
FunctionExprent fexpr_1 = (FunctionExprent)exprent;
List <Exprent> lstOperands = fexpr_1.GetLstOperands();
switch (fexpr_1.GetFuncType())
{
case FunctionExprent.Function_Xor:
{
for (int i = 0; i < 2; i++)
{
Exprent operand = lstOperands[i];
VarType operandtype = operand.GetExprType();
if (operand.type == Exprent.Exprent_Const && operandtype.type != ICodeConstants.Type_Boolean)
{
ConstExprent cexpr = (ConstExprent)operand;
long val;
if (operandtype.type == ICodeConstants.Type_Long)
{
val = (long)cexpr.GetValue();
}
else
{
val = (int)cexpr.GetValue();
}
if (val == -1)
{
List <Exprent> lstBitNotOperand = new List <Exprent>();
lstBitNotOperand.Add(lstOperands[1 - i]);
return(new FunctionExprent(FunctionExprent.Function_Bit_Not, lstBitNotOperand, fexpr_1
.bytecode));
}
}
}
break;
}
case FunctionExprent.Function_Eq:
case FunctionExprent.Function_Ne:
{
if (lstOperands[0].GetExprType().type == ICodeConstants.Type_Boolean && lstOperands
[1].GetExprType().type == ICodeConstants.Type_Boolean)
{
for (int i = 0; i < 2; i++)
{
if (lstOperands[i].type == Exprent.Exprent_Const)
{
ConstExprent cexpr = (ConstExprent)lstOperands[i];
int val = (int)cexpr.GetValue();
if ((fexpr_1.GetFuncType() == FunctionExprent.Function_Eq && val == 1) || (fexpr_1
.GetFuncType() == FunctionExprent.Function_Ne && val == 0))
{
return(lstOperands[1 - i]);
}
else
{
List <Exprent> lstNotOperand = new List <Exprent>();
lstNotOperand.Add(lstOperands[1 - i]);
return(new FunctionExprent(FunctionExprent.Function_Bool_Not, lstNotOperand, fexpr_1
.bytecode));
}
}
}
}
break;
}
case FunctionExprent.Function_Bool_Not:
{
if (lstOperands[0].type == Exprent.Exprent_Const)
{
int val = ((ConstExprent)lstOperands[0]).GetIntValue();
if (val == 0)
{
return(new ConstExprent(VarType.Vartype_Boolean, 1, fexpr_1.bytecode));
}
else
{
return(new ConstExprent(VarType.Vartype_Boolean, 0, fexpr_1.bytecode));
}
}
break;
}
case FunctionExprent.Function_Iif:
{
Exprent expr1_1 = lstOperands[1];
Exprent expr2_1 = lstOperands[2];
if (expr1_1.type == Exprent.Exprent_Const && expr2_1.type == Exprent.Exprent_Const)
{
ConstExprent cexpr1 = (ConstExprent)expr1_1;
ConstExprent cexpr2 = (ConstExprent)expr2_1;
if (cexpr1.GetExprType().type == ICodeConstants.Type_Boolean && cexpr2.GetExprType
().type == ICodeConstants.Type_Boolean)
{
if (cexpr1.GetIntValue() == 0 && cexpr2.GetIntValue() != 0)
{
return(new FunctionExprent(FunctionExprent.Function_Bool_Not, lstOperands[0], fexpr_1
.bytecode));
}
else if (cexpr1.GetIntValue() != 0 && cexpr2.GetIntValue() == 0)
{
return(lstOperands[0]);
}
}
}
break;
}
case FunctionExprent.Function_Lcmp:
case FunctionExprent.Function_Fcmpl:
case FunctionExprent.Function_Fcmpg:
case FunctionExprent.Function_Dcmpl:
case FunctionExprent.Function_Dcmpg:
{
int var = DecompilerContext.GetCounterContainer().GetCounterAndIncrement(CounterContainer
.Var_Counter);
VarType type = lstOperands[0].GetExprType();
FunctionExprent iff = new FunctionExprent(FunctionExprent.Function_Iif, Sharpen.Arrays.AsList <Exprent>
(new FunctionExprent(FunctionExprent.Function_Lt, Sharpen.Arrays.AsList <Exprent>(new VarExprent
(var, type, varProc), ConstExprent.GetZeroConstant(type.type)), null), new ConstExprent
(VarType.Vartype_Int, -1, null), new ConstExprent(VarType.Vartype_Int, 1, null))
, null);
FunctionExprent head = new FunctionExprent(FunctionExprent.Function_Eq, Sharpen.Arrays.AsList <Exprent>
(new AssignmentExprent(new VarExprent(var, type, varProc), new FunctionExprent(FunctionExprent
.Function_Sub, Sharpen.Arrays.AsList(lstOperands[0], lstOperands[1]), null), null
), ConstExprent.GetZeroConstant(type.type)), null);
varProc.SetVarType(new VarVersionPair(var, 0), type);
return(new FunctionExprent(FunctionExprent.Function_Iif, Sharpen.Arrays.AsList <Exprent>(head
, new ConstExprent(VarType.Vartype_Int, 0, null), iff), fexpr_1.bytecode));
}
}
break;
}
case Exprent.Exprent_Assignment:
{
// check for conditional assignment
AssignmentExprent asexpr = (AssignmentExprent)exprent;
Exprent right = asexpr.GetRight();
Exprent left = asexpr.GetLeft();
if (right.type == Exprent.Exprent_Function)
{
FunctionExprent func = (FunctionExprent)right;
VarType midlayer = null;
if (func.GetFuncType() >= FunctionExprent.Function_I2l && func.GetFuncType() <= FunctionExprent
.Function_I2s)
{
right = func.GetLstOperands()[0];
midlayer = func.GetSimpleCastType();
if (right.type == Exprent.Exprent_Function)
{
func = (FunctionExprent)right;
}
else
{
return(null);
}
}
List <Exprent> lstFuncOperands = func.GetLstOperands();
Exprent cond = null;
switch (func.GetFuncType())
{
case FunctionExprent.Function_Add:
case FunctionExprent.Function_And:
case FunctionExprent.Function_Or:
case FunctionExprent.Function_Xor:
{
if (left.Equals(lstFuncOperands[1]))
{
cond = lstFuncOperands[0];
break;
}
goto case FunctionExprent.Function_Sub;
}
case FunctionExprent.Function_Sub:
case FunctionExprent.Function_Mul:
case FunctionExprent.Function_Div:
case FunctionExprent.Function_Rem:
case FunctionExprent.Function_Shl:
case FunctionExprent.Function_Shr:
case FunctionExprent.Function_Ushr:
{
if (left.Equals(lstFuncOperands[0]))
{
cond = lstFuncOperands[1];
}
break;
}
}
if (cond != null && (midlayer == null || midlayer.Equals(cond.GetExprType())))
{
asexpr.SetRight(cond);
asexpr.SetCondType(func.GetFuncType());
}
}
break;
}
case Exprent.Exprent_Invocation:
{
if (!statement_level)
{
// simplify if exprent is a real expression. The opposite case is pretty absurd, can still happen however (and happened at least once).
Exprent retexpr = ConcatenationHelper.ContractStringConcat(exprent);
if (!exprent.Equals(retexpr))
{
return(retexpr);
}
}
break;
}
}
return(null);
}