/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Get the ID (i.e. ASM label) of the method to load a pointer to
Types.MethodInfo methodInfo = conversionState.TheILLibrary.GetMethodInfo(theOp.MethodToCall);
string methodID = methodInfo.ID;
bool addExternalLabel = methodID != conversionState.Input.TheMethodInfo.ID;
//If we want to load the pointer at a specified IL op number:
if (theOp.LoadAtILOpAfterOp != null)
{
ILBlock anILBlock = conversionState.TheILLibrary.GetILBlock(methodInfo);
int index = anILBlock.ILOps.IndexOf(theOp.LoadAtILOpAfterOp);
if (index == -1)
{
throw new NullReferenceException("LoadAtILOpAfterOp not found in IL block!");
}
index++;
methodID = ASM.ASMBlock.GenerateLabel(methodID, anILBlock.PositionOf(anILBlock.ILOps[index]));
}
else if (theOp.LoadAtILOffset != int.MaxValue)
{
//Append the IL sub-label to the ID
ILBlock anILBlock = conversionState.TheILLibrary.GetILBlock(methodInfo);
methodID = ASM.ASMBlock.GenerateLabel(methodID, anILBlock.PositionOf(anILBlock.At(theOp.LoadAtILOffset)));
//Note: This is used by try/catch/finally blocks for pushing pointers
// to catch/finally handlers and filters
}
if (addExternalLabel)
{
conversionState.AddExternalLabel(methodID);
}
//Push the pointer to the function
conversionState.Append(new ASMOps.La()
{
Dest = "$t4", Label = methodID
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t4"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false
});
}