public override void OnBinaryExpression(BinaryExpression node)
{
if (node.Operator == BinaryOperatorType.Assign)
{
OnAssignment(node);
return;
}
if (node.Operator == BinaryOperatorType.TypeTest)
{
OnIsaOperator(node);
return;
}
BoundSpillSequenceBuilder builder = null;
var right = VisitExpression(ref builder, node.Right);
Expression left;
if (builder == null)
{
left = VisitExpression(ref builder, node.Left);
}
else
{
var leftBuilder = new BoundSpillSequenceBuilder();
left = VisitExpression(ref leftBuilder, node.Left);
left = Spill(leftBuilder, left);
if (node.Operator == BinaryOperatorType.Or || node.Operator == BinaryOperatorType.And)
{
var tmp = _F.DeclareTempLocal(_currentMethod, node.ExpressionType);
tmp.Local["SynthesizedKind"] = AWAIT_SPILL_MARKER;
leftBuilder.AddLocal(tmp);
leftBuilder.AddStatement(new ExpressionStatement(_F.CreateAssignment(_F.CreateLocalReference(tmp), left)));
var trueBlock = new Block();
trueBlock.Add(UpdateExpression(builder, _F.CreateAssignment(_F.CreateLocalReference(tmp), right)));
leftBuilder.AddStatement(
new IfStatement(left.LexicalInfo,
node.Operator == BinaryOperatorType.And ?
_F.CreateLocalReference(tmp) :
(Expression)_F.CreateNotExpression(_F.CreateLocalReference(tmp)),
trueBlock,
null));
ReplaceCurrentNode(UpdateExpression(leftBuilder, _F.CreateLocalReference(tmp)));
return;
}
// if the right-hand-side has await, spill the left
leftBuilder.Include(builder);
builder = leftBuilder;
}
node.Left = left;
node.Right = right;
ReplaceCurrentNode(UpdateExpression(builder, node));
}