/// <summary>
/// Visits the specified less than or equal.
/// </summary>
/// <param name="lessThanOrEqual">The less than or equal.</param>
public override void Visit(ILessThanOrEqual lessThanOrEqual)
{
LessThanOrEqual mutableLessThanOrEqual = new LessThanOrEqual(lessThanOrEqual);
this.resultExpression = this.myCodeCopier.DeepCopy(mutableLessThanOrEqual);
}
/// <summary>
/// Visits the specified less than or equal.
/// </summary>
/// <param name="lessThanOrEqual">The less than or equal.</param>
/// <returns></returns>
protected virtual IExpression DeepCopy(LessThanOrEqual lessThanOrEqual)
{
return this.DeepCopy((BinaryOperation)lessThanOrEqual);
}
private static IExpression InvertBinaryOperation(IBinaryOperation binOp) {
Contract.Requires(binOp != null);
Contract.Ensures(Contract.Result<IExpression>() != null);
BinaryOperation/*?*/ result = null;
if (binOp is IEquality && binOp.LeftOperand.Type.TypeCode != PrimitiveTypeCode.Float32 && binOp.LeftOperand.Type.TypeCode != PrimitiveTypeCode.Float64)
result = new NotEquality();
else if (binOp is INotEquality && binOp.LeftOperand.Type.TypeCode != PrimitiveTypeCode.Float32 && binOp.LeftOperand.Type.TypeCode != PrimitiveTypeCode.Float64)
result = new Equality();
else if (binOp is ILessThan)
result = new GreaterThanOrEqual() { IsUnsignedOrUnordered = KeepUnsignedButInvertUnordered(((ILessThan)binOp).IsUnsignedOrUnordered, binOp) };
else if (binOp is ILessThanOrEqual)
result = new GreaterThan() { IsUnsignedOrUnordered = KeepUnsignedButInvertUnordered(((ILessThanOrEqual)binOp).IsUnsignedOrUnordered, binOp) };
else if (binOp is IGreaterThan)
result = new LessThanOrEqual() { IsUnsignedOrUnordered = KeepUnsignedButInvertUnordered(((IGreaterThan)binOp).IsUnsignedOrUnordered, binOp) };
else if (binOp is IGreaterThanOrEqual)
result = new LessThan() { IsUnsignedOrUnordered = KeepUnsignedButInvertUnordered(((IGreaterThanOrEqual)binOp).IsUnsignedOrUnordered, binOp) };
if (result != null) {
result.LeftOperand = binOp.LeftOperand;
result.RightOperand = binOp.RightOperand;
result.Type = binOp.Type;
result.Locations.AddRange(binOp.Locations);
return result;
}
LogicalNot logicalNot = new LogicalNot();
logicalNot.Operand = binOp;
logicalNot.Type = binOp.Type;
logicalNot.Locations.AddRange(binOp.Locations);
return logicalNot;
}
/// <summary>
/// Adds the rsd contract to the method, it is added as a postcondition where the rsd field of the type is less than or equal to limit
/// </summary>
protected FieldDefinition AddRsdContractToMethod(IMethodDefinition method, ITypeReference type, string rsdName, IExpression limit, IExpression cond)
{
var rsdField = GetRsdField(method, rsdName, type);
var newContract = new Microsoft.Cci.MutableContracts.MethodContract();
var postconditions = new List<IPostcondition>();
var limitCondition = new LessThanOrEqual()
{
LeftOperand = new BoundExpression()
{
Definition = rsdField,
Type = rsdField.Type
},
RightOperand = limit,
Type = _host.PlatformType.SystemBoolean,
};
var int32Type = new PlatformType(_host).SystemInt32;
if (cond != null)
{
//cond ==> tmp <= limit =~=
//!cond || tmp <= limit =~=
//!cond ? tmp <= limit : true
postconditions.Add(
new Microsoft.Cci.MutableContracts.PostCondition()
{
Condition = new Conditional()
{
Condition = new LogicalNot() { Operand = cond },
Type = int32Type,
ResultIfTrue = new CompileTimeConstant() { Type = int32Type, Value = 1 },
ResultIfFalse = limitCondition
},
OriginalSource = "!cond ? rsd <= limit : true",
}
);
}
else
{
postconditions.Add(
new Microsoft.Cci.MutableContracts.PostCondition()
{
Condition = limitCondition,
OriginalSource = "rsd <= limit",
}
);
}
newContract.Postconditions = postconditions;
var contract = _contractProvider.GetMethodContractFor(method);
if (contract != null)
{
Microsoft.Cci.MutableContracts.ContractHelper.AddMethodContract(newContract, contract);
}
_contractProvider.AssociateMethodWithContract(method, newContract);
return rsdField;
}
/// <summary>
/// Visits the specified less than or equal.
/// </summary>
/// <param name="lessThanOrEqual">The less than or equal.</param>
/// <returns></returns>
public virtual IExpression Visit(LessThanOrEqual lessThanOrEqual)
{
return this.Visit((BinaryOperation)lessThanOrEqual);
}
/// <summary>
/// Rewrites the children of the given less-than-or-equal expression.
/// </summary>
public virtual void RewriteChildren(LessThanOrEqual lessThanOrEqual)
{
this.RewriteChildren((BinaryOperation)lessThanOrEqual);
}
/// <summary>
/// Visits the specified less than or equal.
/// </summary>
/// <param name="lessThanOrEqual">The less than or equal.</param>
public override void Visit(ILessThanOrEqual lessThanOrEqual)
{
LessThanOrEqual mutableLessThanOrEqual = lessThanOrEqual as LessThanOrEqual;
if (alwaysMakeACopy || mutableLessThanOrEqual == null) mutableLessThanOrEqual = new LessThanOrEqual(lessThanOrEqual);
this.resultExpression = this.myCodeMutator.Visit(mutableLessThanOrEqual);
}