[patch 3.3/3.4/3.5] Fix PR bootstrap/14671

[John David Anglin]

> > Zdenek Dvorak wrote:
> > 
> > >Almost definitely not; it probably just exposes the problem by changing
> > >the memory consumption and consequently the time when garbage
> > >collections are triggered.
> > 
> > Even if that is so, it is still your responsibility to look into it.
> > 
> > Would you please help J. David to track down what's going on?
> 
> I believe that the problem should be fixed by the inclusion of GTY
> markers on the reg_known_value (which probably should be added to
> whatever other branches contain the fix for PR12440).

With the CVS as of D2004.03.26.12.00.00 (i.e., GTY markers on the
reg_known_value array), GCC bootstraps with --enable-languages=c.
I'm now doing a full bootstrap.

I looked at the compilation that was failing with gdb.  However, due
to changes in memory consumption, garbage collection no longer occurs
while in loop_optimize.  I guess that Richard's patch would have
to be back ported to D2004.03.18.16.43.00 to be absolutely certain
whether it fixes the problem.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)