[Bug middle-end/54146] Very slow compile with attribute((flatten))

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54146

Steven Bosscher <steven at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX

--- Comment #55 from Steven Bosscher <steven at gcc dot gnu.org> 2012-08-20 19:30:34 UTC ---
The remaining problem areas are all liveness calculation routines that are
essentially inherent quadratic problems: DF liveness, IRA liveness, and
out-of-SSA liveness. 

I think it would be good to deprecate the flatten attribute...