private AbstractStackState <VariabilityInfo> HandleLdloc(ILInstruction ili, AbstractStackState <VariabilityInfo> pre, int index)
{
Contract.Requires <ArgumentNullException>(pre != null);
Contract.Requires <ArgumentException>(index >= 0);
return(pre.Push(pre.GetLocal(index)).UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleLdsfld(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
FieldInfo field = (FieldInfo)ili.Operand;
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
.Push(newVar)
.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> 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> HandleLdArg(ILInstruction ili, int narg, AbstractStackState <VariabilityInfo> pre)
{
MethodFacts myFacts = FactUniverse.Instance.GetFacts(Method);
EVariability varia;
if (Method.CallingConvention.HasFlag(CallingConventions.HasThis))
{
if (narg == 0)
{
varia = EVariability.Constant;
}
else
{
varia = _callPattern.Pattern[narg - 1];
}
}
else
{
varia = _callPattern.Pattern[narg];
}
return(pre.Push(VariabilityInfo.CreateBySingleDef(varia, ili.Index)).UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> HandleDup(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(pre.Push(pre[0]).UniqueSuccessor());
}
private AbstractStackState <VariabilityInfo> PushC(ILInstruction ili, AbstractStackState <VariabilityInfo> pre)
{
return(pre.Push(VariabilityInfo.CreateBySingleDef(EVariability.Constant, ili.Index)).UniqueSuccessor());
}
