llvm dev - Apr 2011 - [LLVMdev] SDTypeProfile with negative number of operands

I noticed SDTypeProfile is commonly used with -1 for the number of 
operands, as in:

def SDT_SystemZCall         : SDTypeProfile<0, -1,
[SDTCisPtrTy<0>]>;

What does this do?

On Apr 26, 2011, at 1:09 PM, llvmjp wrote:
> I noticed SDTypeProfile is commonly used with -1 for the number of 
> operands, as in:
> 
> def SDT_SystemZCall         : SDTypeProfile<0, -1,
[SDTCisPtrTy<0>]>;
> 
> What does this do?
This means that the node has a variadic/arbitrary number of arguments.

-Chris