http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56488
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> 2013-03-01 09:53:20 UTC --- Seems to me that 'e' is signed and the testcase relies on wrapping overflow (-fwrapv helps).
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56488
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> 2013-03-01 09:53:20 UTC --- Seems to me that 'e' is signed and the testcase relies on wrapping overflow (-fwrapv helps).