> I am fine with disabling the optimization, but as I said, it will make
> our compiler different. I would rather convince the gcc team to consider
> turning the bogus behavior off permanently.

i agree that it's ideal to convince the gcc team.
although i think it's difficult, reading the comment on the bug report.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15685

IMO, in this case, being different is fine.
if a user installs a broken compiler by himself,
he'll get a broken compiler.  there is no difference from
the case of arbitrary broken software.

YAMAMOTO Takashi