private AbstractStackState <VariabilityInfo> HandleNewarr(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(pre
.Pop()
.Push(VariabilityInfo.CreateBySingleDef(EVariability.ExternVariable, ili.Index))
.UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleBinOp(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
VariabilityInfo a = pre[0];
VariabilityInfo b = pre[1];
VariabilityInfo r = VariabilityInfo.MergeByNewDef(a, b, ili.Index);
return(pre.Pop().Pop().Push(r).UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleCpobj(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
VariabilityInfo source = pre[0];
VariabilityInfo dest = pre[1];
AbstractStackState <VariabilityInfo> next = UpdateStackState(ili, source, pre);
next = next.Pop().Pop();
return(next.UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleCall(ILInstruction ili, AbstractStackState <VariabilityInfo> pre, bool isCalli)
{
MethodBase callee = (MethodBase)ili.Operand;
bool hasThis = callee.CallingConvention.HasFlag(CallingConventions.HasThis);
EVariability callVar = EVariability.Constant;
ParameterInfo[] args = callee.GetParameters();
MethodFacts myFacts = FactUniverse.Instance.GetFacts(Method);
MethodFacts calleeFacts = FactUniverse.Instance.GetFacts(callee);
AbstractStackState <VariabilityInfo> next = pre;
if (hasThis)
{
callVar = VariabilityOperations.Stronger(callVar, pre[0].Variability);
next = pre.Pop();
}
for (int i = 0; i < args.Length; i++)
{
callVar = VariabilityOperations.Stronger(callVar, next[0].Variability);
next = next.Pop();
}
if (!calleeFacts.IsSideEffectFree)
{
callVar = EVariability.ExternVariable;
}
if (calleeFacts.IsStaticEvaluation)
{
callVar = EVariability.Constant;
}
if (isCalli)
{
next = pre.Pop();
}
VariabilityInfo callVarI = VariabilityInfo.CreateBySingleDef(callVar, ili.Index);
next = UpdateStackState(ili, callVarI, next);
Type returnType;
if (callee.IsFunction(out returnType))
{
next = next.Push(callVarI);
}
return(next.UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleLdfld(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
FieldInfo field = (FieldInfo)ili.Operand;
int index = Array.IndexOf(_localizedFields, field);
if (index >= 0)
{
return(HandleLdloc(null, pre.Pop(), _localizedFieldsBaseIndex + index));
}
else
{
FieldFacts fieldFacts = FactUniverse.Instance.GetFacts(field);
EVariability fieldVar = fieldFacts.IsWritten || fieldFacts.IsSubMutated ?
EVariability.ExternVariable : EVariability.Constant;
VariabilityInfo newVar = VariabilityInfo.CreateBySingleDef(fieldVar, ili.Index);
return(pre
.Pop()
.Push(newVar)
.UniqueSuccessor());
}
}
private AbstractStackState <VariabilityInfo> HandleRet(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
Type returnType;
if (Method.IsFunction(out returnType))
{
return(pre.Pop().UniqueSuccessor());
}
else
{
return(pre.UniqueSuccessor());
}
}
private AbstractStackState <VariabilityInfo> HandleNewobj(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
ConstructorInfo ctor = (ConstructorInfo)ili.Operand;
ParameterInfo[] args = ctor.GetParameters();
AbstractStackState <VariabilityInfo> next = pre;
for (int i = 0; i < args.Length; i++)
{
next = next.Pop();
}
return(next
.Push(VariabilityInfo.CreateBySingleDef(EVariability.ExternVariable, ili.Index))
.UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleUnBranch(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
VariabilityInfo c = pre[0];
var next = pre.Pop();
if (c.Variability == EVariability.Constant)
{
next = next.UniqueSuccessor();
}
else
{
next = next.AmbiguousSuccessor();
}
return(next);
}
private AbstractStackState <VariabilityInfo> HandleBinBranch(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
VariabilityInfo a = pre[0];
VariabilityInfo b = pre[1];
var next = pre.Pop().Pop();
if (VariabilityOperations.Stronger(a.Variability, b.Variability) == EVariability.Constant)
{
next = next.UniqueSuccessor();
}
else
{
next = next.AmbiguousSuccessor();
}
return(next);
}
private AbstractStackState <VariabilityInfo> HandleLdind(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(PushV(ili, pre.Pop()));
}
private AbstractStackState <VariabilityInfo> Pop3(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(pre.Pop().Pop().Pop().UniqueSuccessor());
}