[Bug target/126581] [16/17 Regression] -mavx10.2 no longer works by r16-9456-gca889982b6f259

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126581

--- Comment #16 from Hu Lin <lin1.hu at intel dot com> ---
(In reply to H.J. Lu from comment #15)
> (In reply to Hu Lin from comment #13)
> > Created attachment 65217 [details]
> > Untested fix.
> > 
> > This is the current version. I think -Werror=deprecated-declarations can
> > help developers prepare in advance.
> 
> Please add a test to show warning without any -Wxxx options.

pr126581-2.c meets this requirement.