[Bug other/20531] New: gcc should warn about undefined behaviour

["pluto at pld-linux dot org" <gcc-bugzilla at gcc dot gnu dot org>]

volatile struct {
    int x, y;
} s;

int foo()
{
    return (s.x > s.y);   // undefined behavior:
                          // the order of volatile accesses
                          // is undefined in this statment
}

-- 
           Summary: gcc should warn about undefined behaviour
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pluto at pld-linux dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pld-linux
  GCC host triplet: i686-pld-linux
GCC target triplet: i686-pld-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20531