[Bug middle-end/39326] Segmentation fault with -O1, out of memory with -O2

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326

--- Comment #27 from Steven Bosscher <steven at gcc dot gnu.org> 2013-03-07 08:09:59 UTC ---
Compilation finished after ~3 hours and consuming at least 3GB (from top - I
forgot to use memmax2...).

Winners in the "geez, I'm slow for this test case" list:

 PRE                        :  6241.75 (57%) usr
 tree loop invariant motion :  4194.83 (38%) usr
 TOTAL                      : 11021.46 

Time is mostly spent in the alias oracle.

For LIM I'm going to test using triangle instead of square dep/indep
matrix, as a first step.  Richi, PRE is yours so... ;-)