http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56426
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-25 12:50:15 UTC --- Lack of predicated value-numbering makes the IL such that copy-propagation inside the loop pipeline makes the single loop reducible. Thus we missed scev_initialize. [gives light to the fact that our concept of 'loop pipeline' is somewhat ill-defined]
