https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102658
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
> Please don't add the -fno- option to the warning tests. As I said,
> I would prefer to either suppress the vectorization for the failing
> cases by tweaking the test code or xfail them. That way future
> regressions won't be masked by the option. Once we've moved
> the warning to a more suitable pass we'll add a new test to verify
> it works as intended or remove the xfails.
Remove -fno-tree-vectorize from the warning tests, and add xfails to them.
The warning information is mainly affected by vectorization of 4 or 2 char
store. Some targets support both, some targets only support one of them,
and some targets supported neither, which means the warning information
would differ from targets to targets.
I only added xfail { x86_64-*-* i?86-*-* }, other backends may need to
re-adjust these xfail.
Also the backend testcases need to be updated
