http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52275
--- Comment #3 from Tobias Grosser <grosser at gcc dot gnu.org> 2012-02-16 14:00:29 UTC --- It seems there Sebastian himself sees the loop flatteing pass as currently unstable: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50335#c8 I would propose to follow his suggestion, disable it for now and readd it as soon as graphite is moved to isl. If anybody else can contribute a patch that fixes the remaining loop flattening problems, I am obviously glad to have a look,
