[Bug bootstrap/14671] [3.3/3.4 regression] caller-save.c:491: internal compiler error: Segmentation fault

["gdr at integrable-solutions dot net" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From gdr at integrable-solutions dot net  2004-05-27 03:55 -------
Subject: Re:  [3.3/3.4 regression] caller-save.c:491: internal compiler error: Segmentation fault

"pinskia at physics dot uc dot edu" <gcc-bugzilla@gcc.gnu.org> writes:

| Subject: Re:  [3.3/3.4 regression] caller-save.c:491: internal compiler error: Segmentation fault
| 
| 
| On May 26, 2004, at 23:38, dave at hiauly1 dot hia dot nrc dot ca wrote:
| 
| > If you look at the comment in ggc-page.c for lookup_page_table_entry,
| > you will see that it says "Die (probably) if the object wasn't 
| > allocated
| > via GC."  The patch in question didn't create the object that caused
| > the ICE.  Thus, as I indicated previously, more information is needed
| > about the object that caused the ICE, and how and when it was added
| > to the alias_invariant array.
| 
| > Richard has indicated that the regression isn't present on 3.4, yet it
| > has essentially the same change.  If we revert this on 3.5, the pa and
| > alpha won't build.  The build problems are critical for these ports.
| 
| 
| I think this was fixed lately on the mainline fully by:
| <http://gcc.gnu.org/ml/gcc-patches/2004-05/msg01413.html>.

Andrew --

Thanks for the detective work.

| Could someone test the backport of this patch, ggc_free can be safely
| removed as it is an optimization

Richard --
Can you try that?  If it works, I'll apply it immediately, plus
Eric's patch.  Whic I suppose would resolve this very interesting
issue. 

(And any Alpha expert around is also needed :-))

-- Gaby


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14671