[Bug gcov-profile/45890] Coverage may be weakened by r164986

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45890

--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> 2011-10-04 10:18:18 UTC ---
On Tue, 4 Oct 2011, hubicka at ucw dot cz wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45890
> 
> --- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> 2011-10-04 10:04:37 UTC ---
> > Where do we do it right now?  At profile instrumentation stage, right?
> > I'd say if we don't need SSA form we should do coverage instrumentation
> > right after CFG construction, no?  Before into-SSA we already have
> > stuff like OMP lowering.  But yes, just after into-SSA would be
> > an improvement.
> 
> We could also re-instantiate the former profiling pass before SSA for coverage,
> but it seems to me that there is no real reason to destroy line info before
> we get into-SSA and things will be a bit smoother if we do instrumentation
> at SSA form only.  But I don't really have any strong opinions here.

Yeah, I suppose you are right.