http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53316
--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-11 08:58:23 UTC --- (In reply to comment #7) > (In reply to comment #6) > > A big question for -Odebug is e.g. if we should enable var-tracking for it > > or > > not. While it is time consuming, it should improve the debug experience, > > there > > are various cases where -O -g is actually better debuggable than -O0 -g > > which > > doesn't do var-tracking, e.g. with register vars, or VLAs, or during > > prologues/epilogues. > > Well, -Odebug should aid debugging, so yes, we should enable var-tracking for > it (we can throttle the limiting --params more if compile-time is going to be > an issue). Of course we should evaluate the actual benefit of > var-tracking for -Odebug when it materializes. Btw, my personal goal is to make -Odebug a good default for my GCC development tree (which currently sits at -O0 -g) - I suppose for that particular case var-tracking isn't that important, but I will definitely notice if there is a difference ;)
