------- Additional Comments From joseph at codesourcery dot com 2005-06-09 17:11 ------- Subject: Re: GCC should combine adjacent stdio calls
On Thu, 9 Jun 2005, ghazi at gcc dot gnu dot org wrote: > > ------- Additional Comments From ghazi at gcc dot gnu dot org 2005-06-09 > 16:55 ------- > (In reply to comment #3) > > Subject: Re: GCC should combine adjacent stdio > > calls > > Another problem case is if the first format has excess arguments (which is > > permitted by ISO C) - those arguments must be evaluated but not included > > in the concatenated argument list. > > While it may be legal, our -Wformat option warns about excess arguments and I > would suggest we don't attempt any optimization unless we pass -Wformat > cleanly. So I think this one is surmountable. We linked -Wformat into optimization before, then removed the link. Although we could resurrect the status_warning function which could set a status variable if it would warn rather than emitting the warning (and again save and restore all the variable controlling format warnings), it's not clear this is very desirable. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21982
