http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48209
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-22 16:31:12 UTC --- I strongly disagree. The test is testing also whether the optimization works correctly. Feel free to xfail the test on targets that don't have C99 compliant snprintf, but on targets that do have it the test should test it as it does currently.
