[Bug tree-optimization/23855] loop header should also be pulled out of the inner loop too

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23855

--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
Some more TLC to be applied before it's ready for prime time (and obviously
testing).  Eventually integrating with LIM sounds better?