fold_builtin_memcpy cannot optimize <retval>?

[Paul Brook]

On Friday 21 January 2005 18:03, Mark Mitchell wrote:
> Jeffrey A Law wrote:
> > I'm not an expert on the differences in the semantics of POINTER_TYPE
> > and REFERENCE_TYPE, but I do know that I've been treating them as
> > effectively the same.
>
> The only difference is that a REFERENCE_TYPE object can never be NULL.

Didn't we discuss this before and decide that REFERENCE_TYPE objects can be 
NULL?
http://gcc.gnu.org/ml/gcc-patches/2004-08/msg01463.html

Paul