[Bug tree-optimization/54735] [4.8 Regression] Segmentation fault in walk_aliased_vdefs_1

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54735

Markus Trippelsdorf <markus at trippelsdorf dot de> changed:

           What    |Removed                     |Added
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                 CC|                            |jamborm at gcc dot gnu.org

--- Comment #5 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-09-29 07:06:15 UTC ---
(In reply to comment #4)
> (In reply to comment #3)
> > r191747 should not increase the memory consumption. Instead, it'll only speedup
> > compilation.
> > 
> > I tried to compile the testcase without the patch, the memory consumption still
> > increase, but very slowly (it took around 30 minutes to climb up to 1.8G)
>
> I will let the testcase run overnight with r191747 reverted and 
> I guess it will also crash after a few hours.

It took roughly one hour to crash (amazing what an effect a single & can have).

The real culprit seems to be r190313:

commit a4f60e55a178cb5500186d27ff3fd4a62d0281e3
Author: jamborm <jamborm@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Sat Aug 11 10:50:24 2012 +0000

    2012-08-11  Martin Jambor  <mjambor@suse.cz>

        PR fortran/48636
        * ipa-inline.h (condition): New fields offset, agg_contents and by_ref.
        * ipa-inline-analysis.c (agg_position_info): New type.
...