http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772
--- Comment #15 from Marc Glisse <marc.glisse at normalesup dot org> 2012-04-28 12:55:28 UTC --- (In reply to comment #14) > (In reply to comment #13) > > > > Except that this version would warn for x<INT_MIN && x>INT_MAX, whereas this > > belongs to other warnings. So testing the triviality of the first ranges > > seems > > best. > > I don't understand. This warning (whatever its name) should precisely warn for > that with "logical 'and' of mutually exclusive tests is always false". No, there could be a warning that the first test is always false, another one that the second one is always false, but adding a third warning that the conjunction of the 2 is always false seems bogus. This warning is meant for: x<5&&x>10, where each test independently could be true, just not both at the same time. At least that is my understanding...
