http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47555
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-01 13:41:25 UTC --- With --param scev-max-expr-size=20 (the 4.5 default) trunk uses 300MB ram, with 21 it uses 580MB with 22 1.2GB, with 23 2.2GB, ... so it indeed grows exponential (as designed). Bumping from 20 to 100 is thus definitely unreasonable ;)
