[Bug c++/46806] -O3 implies 0 <= 8 <= 7

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46806

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-12-05 
04:16:26 UTC ---
dup of PR 43680 - the default behaviour has changed in 4.6, -fstrict-enums
restores the old semantics