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> HandleRet(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
Type returnType;
if (Method.IsFunction(out returnType))
{
return(pre.Pop().UniqueSuccessor());
}
else
{
return(pre.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> Nop(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(pre.UniqueSuccessor());
}
