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[Bug middle-end/54146] Very slow compile with attribute((flatten))
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 20 Aug 2012 19:30:34 +0000
- Subject: [Bug middle-end/54146] Very slow compile with attribute((flatten))
- Auto-submitted: auto-generated
- References: <bug-54146-4@http.gcc.gnu.org/bugzilla/>
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...