internal Dictionary <MethodDefinition, Interval> finallyMethodToStateInterval; // used only for IteratorDispose
/// <summary>
/// Initializes the state range logic:
/// Clears 'ranges' and sets 'ranges[entryPoint]' to the full range (int.MinValue to int.MaxValue)
/// </summary>
public StateRangeAnalysis(ILNode entryPoint, StateRangeAnalysisMode mode, FieldDefinition stateField)
{
this.mode = mode;
this.stateField = stateField;
if (mode == StateRangeAnalysisMode.IteratorDispose)
{
finallyMethodToStateInterval = new Dictionary <MethodDefinition, Interval>();
}
ranges = new DefaultDictionary <ILNode, StateRange>(n => new StateRange());
ranges[entryPoint] = new StateRange(int.MinValue, int.MaxValue);
evalContext = new SymbolicEvaluationContext(stateField);
}
internal static void TranslateFieldsToLocalAccess(List <ILNode> newBody, Dictionary <FieldDefinition, ILVariable> fieldToParameterMap)
{
var fieldToLocalMap = new DefaultDictionary <FieldDefinition, ILVariable>(f => new ILVariable {
Name = f.Name, Type = f.FieldType
});
foreach (ILNode node in newBody)
{
foreach (ILExpression expr in node.GetSelfAndChildrenRecursive <ILExpression>())
{
FieldDefinition field = GetFieldDefinition(expr.Operand as FieldReference);
if (field != null)
{
switch (expr.Code)
{
case ILCode.Ldfld:
if (expr.Arguments[0].MatchThis())
{
expr.Code = ILCode.Ldloc;
if (fieldToParameterMap.ContainsKey(field))
{
expr.Operand = fieldToParameterMap[field];
}
else
{
expr.Operand = fieldToLocalMap[field];
}
expr.Arguments.Clear();
}
break;
case ILCode.Stfld:
if (expr.Arguments[0].MatchThis())
{
expr.Code = ILCode.Stloc;
if (fieldToParameterMap.ContainsKey(field))
{
expr.Operand = fieldToParameterMap[field];
}
else
{
expr.Operand = fieldToLocalMap[field];
}
expr.Arguments.RemoveAt(0);
}
break;
case ILCode.Ldflda:
if (expr.Arguments[0].MatchThis())
{
expr.Code = ILCode.Ldloca;
if (fieldToParameterMap.ContainsKey(field))
{
expr.Operand = fieldToParameterMap[field];
}
else
{
expr.Operand = fieldToLocalMap[field];
}
expr.Arguments.Clear();
}
break;
}
}
}
}
}
