/// <summary>
/// Visits the specified equality.
/// </summary>
/// <param name="equality">The equality.</param>
public override void Visit(IEquality equality)
{
Equality mutableEquality = new Equality(equality);
this.resultExpression = this.myCodeCopier.DeepCopy(mutableEquality);
}
/// <summary>
/// Visits the specified equality.
/// </summary>
/// <param name="equality">The equality.</param>
/// <returns></returns>
protected virtual IExpression DeepCopy(Equality equality)
{
return this.DeepCopy((BinaryOperation)equality);
}
public override IExpression Visit(Equality equality)
{
if (equality.LeftOperand.Type.TypeCode == PrimitiveTypeCode.Boolean) {
if (ExpressionHelper.IsIntegralZero(equality.RightOperand))
return PatternDecompiler.InvertCondition(this.Visit(equality.LeftOperand));
}
return base.Visit(equality);
}
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;
}
public override IExpression Rewrite(IMethodCall methodCall)
{
_log.Info("Rewriting IMethodCall: " + methodCall+" Pass: "+MutationTarget.PassInfo);
var equality = new Equality();
equality.LeftOperand = methodCall.ThisArgument;
equality.RightOperand = methodCall.Arguments.Single();
equality.Type = Host.PlatformType.SystemBoolean;
return equality;
}
/// <summary>
/// Create the body of the generic version of GetEnumerator for the iterator closure class.
///
/// The body's pseudo code.
/// {
/// if (Thread.CurrentThread.ManagedThreadId == this.l_initialThreadId AND this.state == -2) {
/// this.state = 0;
/// return this;
/// }
/// else {
/// return a new copy of the iterator instance with state being zero.
/// }
/// }
/// </summary>
private BlockStatement GetBodyOfGenericGetEnumerator(IteratorClosureInformation iteratorClosure) {
var thisDotState = new BoundExpression() {
Definition = iteratorClosure.StateFieldReference,
Instance = new ThisReference(),
Type = this.host.PlatformType.SystemInt32
};
var thisDotThreadId = new BoundExpression() {
Definition = iteratorClosure.InitThreadIdFieldReference,
Instance = new ThisReference(),
Type = this.host.PlatformType.SystemInt32
};
var currentThreadId = new MethodCall() {
MethodToCall = ThreadDotManagedThreadId.Getter,
ThisArgument = ThreadDotCurrentThread,
Type = this.host.PlatformType.SystemInt32
};
var stateEqMinus2 = new Equality() { LeftOperand = thisDotState, RightOperand = new CompileTimeConstant() { Type = this.host.PlatformType.SystemInt32, Value = -2 }, Type = this.host.PlatformType.SystemBoolean };
var threadIdEqCurrentThreadId = new Equality { LeftOperand = thisDotThreadId, RightOperand = currentThreadId, Type = this.host.PlatformType.SystemBoolean };
var thisDotStateEq0 = new ExpressionStatement() {
Expression = new Assignment() {
Source = new CompileTimeConstant() { Type = this.host.PlatformType.SystemInt32, Value = 0 },
Target = new TargetExpression() {
Definition = iteratorClosure.StateFieldReference,
Instance = new ThisReference(),
Type = this.host.PlatformType.SystemInt32
},
Type = this.host.PlatformType.SystemInt32
},
};
var returnThis = new BlockStatement();
returnThis.Statements.Add(thisDotStateEq0);
returnThis.Statements.Add(new ReturnStatement() { Expression = new ThisReference() });
var returnNew = new BlockStatement();
var args = new List<IExpression>();
args.Add(new CompileTimeConstant() { Value = 0, Type = this.host.PlatformType.SystemInt32 });
var closureInstanceLocalDecl = new LocalDeclarationStatement() {
LocalVariable = new LocalDefinition() {
Name = this.host.NameTable.GetNameFor("local0"),
Type = iteratorClosure.ClosureDefinitionReference
},
InitialValue = new CreateObjectInstance() {
MethodToCall = iteratorClosure.ConstructorReference,
Arguments = args,
Type = iteratorClosure.ClosureDefinitionReference
}
};
var returnNewClosureInstance = new ReturnStatement() {
Expression = new BoundExpression() {
Instance = null,
Type = iteratorClosure.ClosureDefinitionReference,
Definition = closureInstanceLocalDecl.LocalVariable
}
};
returnNew.Statements.Add(closureInstanceLocalDecl);
if (!method.IsStatic) {
ExpressionStatement assignThisDotThisToNewClosureDotThis = new ExpressionStatement() {
Expression = new Assignment() {
Source = new BoundExpression() {
Definition = iteratorClosure.ThisFieldReference,
Instance = new ThisReference(),
Type = iteratorClosure.ClosureDefinitionReference
},
Type = iteratorClosure.ClosureDefinition,
Target = new TargetExpression() {
Instance = new BoundExpression() {
Instance = null,
Definition = closureInstanceLocalDecl.LocalVariable,
Type = iteratorClosure.ClosureDefinitionReference
},
Definition = iteratorClosure.ThisFieldReference,
Type = iteratorClosure.ClosureDefinitionReference
}
}
};
returnNew.Statements.Add(assignThisDotThisToNewClosureDotThis);
}
returnNew.Statements.Add(returnNewClosureInstance);
ConditionalStatement returnThisOrNew = new ConditionalStatement() {
Condition = new Conditional() {
Condition = stateEqMinus2,
ResultIfTrue = threadIdEqCurrentThreadId,
ResultIfFalse = new CompileTimeConstant() { Type = this.host.PlatformType.SystemBoolean, Value = false },
Type = this.host.PlatformType.SystemBoolean
},
TrueBranch = returnThis,
FalseBranch = returnNew
};
BlockStatement block = new BlockStatement();
block.Statements.Add(returnThisOrNew);
return block;
}
/// <summary>
/// Rewrites the children of the given equality expression.
/// </summary>
public virtual void RewriteChildren(Equality equality)
{
this.RewriteChildren((BinaryOperation)equality);
}
/// <summary>
/// Visits the specified equality.
/// </summary>
/// <param name="equality">The equality.</param>
/// <returns></returns>
public virtual IExpression Visit(Equality equality)
{
return this.Visit((BinaryOperation)equality);
}
/// <summary>
/// Visits the specified equality.
/// </summary>
/// <param name="equality">The equality.</param>
public override void Visit(IEquality equality)
{
Equality mutableEquality = equality as Equality;
if (alwaysMakeACopy || mutableEquality == null) mutableEquality = new Equality(equality);
this.resultExpression = this.myCodeMutator.Visit(mutableEquality);
}