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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/38474] compile time explosion in dataflow_set_preserve_mem_locs at -O3
Date: Wed, 10 Feb 2021 16:06:19 +0000	[thread overview]
Message-ID: <bug-38474-4-iHbllbCx2C@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-38474-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474

--- Comment #91 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the other simple idea I have is to limit the number of active store groups
and force-terminate in either a LRU or FIFO manner.

For the testcase at hand the decls we start the chain for are all only
used in full but knowing that would require some pre-analysis of the IL
similar to what SRA does for example (collecting all accesses).  It's
then also still easy to "break" such heuristic so limiting is in the end
the only (and I guess best) option.

  parent reply	other threads:[~2021-02-10 16:06 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-38474-4@http.gcc.gnu.org/bugzilla/>
2011-04-28 16:04 ` [Bug middle-end/38474] slow compilation at -O0 due to expand's temp slot goo rguenth at gcc dot gnu.org
2011-12-02 13:06 ` steven at gcc dot gnu.org
2011-12-02 13:25 ` matz at gcc dot gnu.org
2012-05-27 23:24 ` steven at gcc dot gnu.org
2012-05-29  7:53 ` Joost.VandeVondele at mat dot ethz.ch
2012-05-29 13:09 ` matz at gcc dot gnu.org
2012-05-29 13:12 ` matz at gcc dot gnu.org
2012-05-29 15:08 ` hubicka at gcc dot gnu.org
2012-05-29 16:00 ` jamborm at gcc dot gnu.org
2012-06-15 14:56 ` matz at gcc dot gnu.org
2012-06-15 15:13 ` matz at gcc dot gnu.org
2012-06-15 15:26 ` Joost.VandeVondele at mat dot ethz.ch
2012-06-26 14:26 ` jamborm at gcc dot gnu.org
2012-06-26 14:45 ` matz at gcc dot gnu.org
2012-06-26 14:58 ` rguenth at gcc dot gnu.org
2012-06-26 15:01 ` jamborm at gcc dot gnu.org
2012-06-29 14:34 ` jamborm at gcc dot gnu.org
2012-07-02 15:28 ` jamborm at gcc dot gnu.org
2012-07-02 15:44 ` jamborm at gcc dot gnu.org
2012-07-02 15:53 ` jamborm at gcc dot gnu.org
2012-08-28  8:25 ` steven at gcc dot gnu.org
2012-08-28 11:28 ` Joost.VandeVondele at mat dot ethz.ch
2012-08-28 14:55 ` Joost.VandeVondele at mat dot ethz.ch
2012-08-28 15:07 ` steven at gcc dot gnu.org
2013-03-06 11:01 ` [Bug middle-end/38474] compile time explosion in dataflow_set_preserve_mem_locs at -O3 steven at gcc dot gnu.org
2013-03-07 10:32 ` rguenth at gcc dot gnu.org
2013-03-07 14:55 ` rguenth at gcc dot gnu.org
2013-12-06 13:43 ` rguenth at gcc dot gnu.org
2013-12-06 14:20 ` rguenth at gcc dot gnu.org
2013-12-09 15:13 ` rguenth at gcc dot gnu.org
2013-12-10 12:31 ` rguenth at gcc dot gnu.org
2021-02-10 14:52 ` rguenth at gcc dot gnu.org
2021-02-10 15:03 ` rguenth at gcc dot gnu.org
2021-02-10 15:46 ` rguenth at gcc dot gnu.org
2021-02-10 15:47 ` rguenth at gcc dot gnu.org
2021-02-10 15:51 ` jakub at gcc dot gnu.org
2021-02-10 15:55 ` rguenther at suse dot de
2021-02-10 16:02 ` rguenth at gcc dot gnu.org
2021-02-10 16:06 ` jakub at gcc dot gnu.org
2021-02-10 16:06 ` rguenth at gcc dot gnu.org [this message]
2021-02-10 16:28 ` rguenth at gcc dot gnu.org
2021-02-10 16:49 ` jakub at gcc dot gnu.org
2021-02-11  9:32 ` rguenth at gcc dot gnu.org
2021-02-12  8:57 ` cvs-commit at gcc dot gnu.org
2021-02-12 10:29 ` rguenth at gcc dot gnu.org
2021-02-12 10:35 ` rguenth at gcc dot gnu.org
2021-02-12 11:42 ` cvs-commit at gcc dot gnu.org
2021-02-12 14:40 ` rguenth at gcc dot gnu.org
2021-02-16 12:38 ` cvs-commit at gcc dot gnu.org
2021-04-29  8:04 ` cvs-commit at gcc dot gnu.org

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