/// <summary cref="IValueVisitor.Visit(GetViewLength)"/>
public void Visit(GetViewLength value)
{
var target = Allocate(value);
var viewSource = LoadView(value.View);
using (var statement = BeginStatement(target))
{
statement.Append(viewSource);
statement.AppendField(viewSource.LengthFieldIndex);
}
}
/// <summary>
/// Lowers set field operations into separate SSA values.
/// </summary>
private static void Lower(
RewriterContext context,
TypeLowering <ViewType> _,
GetViewLength value)
{
var length = context.Builder.CreateGetField(
value.Location,
value.View,
new FieldSpan(1));
context.ReplaceAndRemove(value, length);
}
/// <summary>
/// Lowers set field operations into separate SSA values.
/// </summary>
private static void Lower(
RewriterContext context,
TypeLowering <ViewType> _,
GetViewLength value)
{
var builder = context.Builder;
var length = builder.CreateGetField(
value.Location,
value.View,
new FieldSpan(1));
// Convert to a 32bit length value
if (value.Is32BitProperty)
{
length = builder.CreateConvertToInt32(
value.Location,
length);
}
context.ReplaceAndRemove(value, length);
}
/// <summary>
/// Converts a new get length node into an SSA value.
/// </summary>
private static void Convert <TConstructionData>(
SSARewriterContext <Value> context,
TConstructionData data,
GetViewLength getViewLength)
where TConstructionData : IConstructionData
{
if (!data.TryGetConverted(getViewLength.View, out var getRef))
{
return;
}
// Get the SSA structure value
var ssaValue = context.GetValue(context.Block, getRef.Source);
// Get the view length from the first field (index 0) of the wrapped
// array structure
ssaValue = context.Builder.CreateGetField(
getViewLength.Location,
ssaValue,
new FieldSpan(new FieldAccess(0)));
context.ReplaceAndRemove(getViewLength, ssaValue);
}
public void Visit(GetViewLength value)
{
}
/// <summary cref="IValueVisitor.Visit(GetViewLength)"/> public void Visit(GetViewLength value) => throw new InvalidCodeGenerationException();
/// <summary cref="IValueVisitor.Visit(GetViewLength)"/>
public void Visit(GetViewLength value)
{
var viewSource = LoadAs <ViewImplementationRegister>(value.View);
Bind(value, viewSource.Length);
}
/// <summary cref="IValueVisitor.Visit(GetViewLength)"/>
public void Visit(GetViewLength value)
{
var viewSource = LoadAs <ViewVariable>(value.View);
Bind(value, viewSource.Length);
}
