[Bug tree-optimization/57318] [4.9 Regression] optimizer takes several seconds on nested loops

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57318

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
 BB: 5, after_exit: 0
  size:   1 vol.0_11 ={v} v.f0;
   Constant expression will be folded away.

obviously wrong.  I have a patch.