[Bug tree-optimization/67328] range test rather than single bit test for code testing enum values

[tetra2005 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67328

--- Comment #8 from Yuri Gribov <tetra2005 at gmail dot com> ---
Alan,(In reply to Alan Modra from comment #0)
> It looks like gcc incorrectly prefers a range test.

Alan, can we close this?