|
public static Write ( QilNode nd ) : |
||
| nd | QilNode | |
| return | ||
/// <summary>
/// Recursively analyze the definition of a function.
/// </summary>
private static void AnalyzeDefinition(QilNode nd)
{
Debug.Assert(XmlILConstructInfo.Read(nd).PushToWriterLast,
"Only need to analyze expressions which will be compiled in push mode.");
switch (nd.NodeType)
{
case QilNodeType.Invoke:
// Invoke node can either be compiled as IteratorThenWriter, or Writer.
// Since IteratorThenWriter involves caching the results of the function call
// and iterating over them, .tailcall cannot be used
if (XmlILConstructInfo.Read(nd).ConstructMethod == XmlILConstructMethod.Writer)
{
OptimizerPatterns.Write(nd).AddPattern(OptimizerPatternName.TailCall);
}
break;
case QilNodeType.Loop: {
// Recursively analyze Loop return value
QilLoop ndLoop = (QilLoop)nd;
if (ndLoop.Variable.NodeType == QilNodeType.Let || !ndLoop.Variable.Binding.XmlType.MaybeMany)
{
AnalyzeDefinition(ndLoop.Body);
}
break;
}
case QilNodeType.Sequence: {
// Recursively analyze last expression in Sequence
QilList ndSeq = (QilList)nd;
if (ndSeq.Count > 0)
{
AnalyzeDefinition(ndSeq[ndSeq.Count - 1]);
}
break;
}
case QilNodeType.Choice: {
// Recursively analyze Choice branches
QilChoice ndChoice = (QilChoice)nd;
for (int i = 0; i < ndChoice.Branches.Count; i++)
{
AnalyzeDefinition(ndChoice.Branches[i]);
}
break;
}
case QilNodeType.Conditional: {
// Recursively analyze Conditional branches
QilTernary ndCond = (QilTernary)nd;
AnalyzeDefinition(ndCond.Center);
AnalyzeDefinition(ndCond.Right);
break;
}
case QilNodeType.Nop:
AnalyzeDefinition(((QilUnary)nd).Child);
break;
}
}
/// <summary>
/// Create and initialize OptimizerPatterns annotation for the specified node.
/// </summary>
public static void Inherit(QilNode ndSrc, QilNode ndDst, OptimizerPatternName pattern)
{
OptimizerPatterns annSrc = OptimizerPatterns.Read(ndSrc);
if (annSrc.MatchesPattern(pattern))
{
OptimizerPatterns annDst = OptimizerPatterns.Write(ndDst);
annDst.AddPattern(pattern);
// Inherit pattern arguments
switch (pattern)
{
case OptimizerPatternName.Step:
annDst.AddArgument(OptimizerPatternArgument.StepNode, annSrc.GetArgument(OptimizerPatternArgument.StepNode));
annDst.AddArgument(OptimizerPatternArgument.StepInput, annSrc.GetArgument(OptimizerPatternArgument.StepInput));
break;
case OptimizerPatternName.FilterElements:
annDst.AddArgument(OptimizerPatternArgument.ElementQName, annSrc.GetArgument(OptimizerPatternArgument.ElementQName));
break;
case OptimizerPatternName.FilterContentKind:
annDst.AddArgument(OptimizerPatternArgument.KindTestType, annSrc.GetArgument(OptimizerPatternArgument.KindTestType));
break;
case OptimizerPatternName.EqualityIndex:
annDst.AddArgument(OptimizerPatternArgument.IndexedNodes, annSrc.GetArgument(OptimizerPatternArgument.IndexedNodes));
annDst.AddArgument(OptimizerPatternArgument.KeyExpression, annSrc.GetArgument(OptimizerPatternArgument.KeyExpression));
break;
case OptimizerPatternName.DodReverse:
case OptimizerPatternName.JoinAndDod:
annDst.AddArgument(OptimizerPatternArgument.DodStep, annSrc.GetArgument(OptimizerPatternArgument.DodStep));
break;
case OptimizerPatternName.MaxPosition:
annDst.AddArgument(OptimizerPatternArgument.MaxPosition, annSrc.GetArgument(OptimizerPatternArgument.MaxPosition));
break;
case OptimizerPatternName.SingleTextRtf:
annDst.AddArgument(OptimizerPatternArgument.RtfText, annSrc.GetArgument(OptimizerPatternArgument.RtfText));
break;
}
}
}