/// <summary>
/// May introduce a temp which it will return. (otherwise returns null)
/// </summary>
private LocalDefinition EmitDupAddress(BoundDup dup, AddressKind addressKind)
{
if (!HasHome(dup, addressKind))
{
return(EmitAddressOfTempClone(dup));
}
_builder.EmitOpCode(ILOpCode.Dup);
return(null);
}
/// <summary>
/// May introduce a temp which it will return. (otherwise returns null)
/// </summary>
private LocalDefinition EmitDupAddress(BoundDup dup, AddressKind addressKind)
{
if (!HasHome(dup, needWriteable: addressKind != AddressKind.ReadOnly))
{
return(EmitAddressOfTempClone(dup));
}
_builder.EmitOpCode(ILOpCode.Dup);
return(null);
}
internal SubsumptionDiagnosticBuilder(Symbol enclosingSymbol,
SwitchStatementSyntax syntax,
Conversions conversions,
TypeSymbol switchGoverningType)
: base(enclosingSymbol, syntax, conversions)
{
// For the purpose of computing subsumption, we ignore the input expression's constant
// value. Therefore we create a fake expression here that doesn't contain the value.
var placeholderExpression = new BoundDup(syntax, RefKind.None, switchGoverningType);
_subsumptionTree = CreateEmptyDecisionTree(placeholderExpression);
}
private void EmitDupExpression(BoundDup expression, bool used)
{
if (expression.RefKind == RefKind.None)
{
// unused dup is noop
if (used)
{
_builder.EmitOpCode(ILOpCode.Dup);
}
}
else
{
_builder.EmitOpCode(ILOpCode.Dup);
// must read in case if it is a null ref
EmitLoadIndirect(expression.Type, expression.Syntax);
EmitPopIfUnused(used);
}
}
