public ISymbolNode ComputeConstantLookup(ReadyToRunHelperId lookupKind, object targetOfLookup)
{
switch (lookupKind)
{
case ReadyToRunHelperId.TypeHandle:
return(NodeFactory.ConstructedTypeSymbol((TypeDesc)targetOfLookup));
case ReadyToRunHelperId.NecessaryTypeHandle:
return(NecessaryTypeSymbolIfPossible((TypeDesc)targetOfLookup));
case ReadyToRunHelperId.TypeHandleForCasting:
{
var type = (TypeDesc)targetOfLookup;
if (type.IsNullable)
{
targetOfLookup = type.Instantiation[0];
}
return(NecessaryTypeSymbolIfPossible((TypeDesc)targetOfLookup));
}
case ReadyToRunHelperId.MethodDictionary:
return(NodeFactory.MethodGenericDictionary((MethodDesc)targetOfLookup));
case ReadyToRunHelperId.MethodEntry:
return(NodeFactory.FatFunctionPointer((MethodDesc)targetOfLookup));
case ReadyToRunHelperId.MethodHandle:
return(NodeFactory.RuntimeMethodHandle((MethodDesc)targetOfLookup));
case ReadyToRunHelperId.FieldHandle:
return(NodeFactory.RuntimeFieldHandle((FieldDesc)targetOfLookup));
case ReadyToRunHelperId.DefaultConstructor:
{
var type = (TypeDesc)targetOfLookup;
MethodDesc ctor = GetConstructorForCreateInstanceIntrinsic(type);
return(NodeFactory.CanonicalEntrypoint(ctor));
}
case ReadyToRunHelperId.ObjectAllocator:
{
var type = (TypeDesc)targetOfLookup;
return(NodeFactory.ExternSymbol(JitHelper.GetNewObjectHelperForType(type)));
}
default:
throw new NotImplementedException();
}
}
protected override Helper CreateValueFromKey(ReadyToRunHelper key)
{
string mangledName;
MethodDesc methodDesc;
JitHelper.GetEntryPoint(_compilation.TypeSystemContext, key, out mangledName, out methodDesc);
Debug.Assert(mangledName != null || methodDesc != null);
ISymbolNode entryPoint;
if (mangledName != null)
{
entryPoint = _compilation.NodeFactory.ExternSymbol(mangledName);
}
else
{
entryPoint = _compilation.NodeFactory.MethodEntrypoint(methodDesc);
}
return(new Helper(key, entryPoint));
}
