https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84772
--- Comment #7 from Zack Weinberg <zackw at panix dot com> --- I no longer remember enough about GIMPLE to comment on your actual proposed fix, but I do have a small nitpick on the test case: + va_arg (ap, long double); /* { dg-bogus "may be used uninitialized in this function" } */ I think that needs to be just { dg-bogus "used uninitialized" }, as you might get either the "may be used initialized" or the "is used uninitialized" message.