tidy some gimplifcation unsharing

[Dale Johannesen]

On May 28, 2004, at 7:01 AM, Diego Novillo wrote:
> On Fri, 2004-05-28 at 09:58, Diego Novillo wrote:
>
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14498 has a test case.  We
>> really need to lower VA_ARG_EXPR.  This is just too ugly.
>>
> Which reminds me.  Dale, did you ever add this to the testsuite?  If
> not, could you add it now?

Apparently not.  OK, it's in (mainline).