From: Andrey Belevantsev <abel@ispras.ru>
To: Ian Lance Taylor <iant@google.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>,
Jim Wilson <wilson@tuliptree.org>,
Vladimir Makarov <vmakarov@redhat.com>
Subject: Re: Selective scheduling pass - middle end changes [1/1]
Date: Tue, 08 Jul 2008 14:54:00 -0000 [thread overview]
Message-ID: <48737AE3.3050109@ispras.ru> (raw)
In-Reply-To: <m31w2ex5pa.fsf@google.com>
Hello,
Ian Lance Taylor wrote:
> Well, I'm uncomfortable with the idea of the hook. I wouldn't
> necessarily mind a complete hook interface. But the one you've
> implemented seems sort of ad hoc and easy to get wrong. We don't
> currently have any way for a pass to clearly track every change to the
> RTL insn stream. If we need that, I think we should do it for real.
I have looked closely at the places where jumps are generated by
cfgrtl.c. There are only two of them, one in
force_fallthru_and_redirect and one in try_redirect_by_replacing_jump,
and all our usage of split_edge and redirect_edge_and_branch leads to
these places. What if I add an interface for register/unregister a hook
that would notify of creating new jumps by those functions? This way,
the changes in the scheduler will be minimal, and the hook itself would
be much more safe. I can make it a general cfg hook if desired, but I
doubt that tree cfg or cfglayout will use it.
Andrey
next prev parent reply other threads:[~2008-07-08 14:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-03 14:24 [RFC] Selective scheduling pass Andrey Belevantsev
2008-06-03 14:26 ` Selective scheduling pass - middle end changes [1/1] Andrey Belevantsev
2008-06-11 1:04 ` Ian Lance Taylor
2008-06-11 13:40 ` Andrey Belevantsev
2008-06-11 14:30 ` Ian Lance Taylor
2008-06-27 13:10 ` Andrey Belevantsev
2008-06-30 16:16 ` Ian Lance Taylor
2008-07-08 14:54 ` Andrey Belevantsev [this message]
2008-07-08 15:29 ` Ian Lance Taylor
2008-08-22 15:55 ` Andrey Belevantsev
2008-06-03 14:27 ` Selective scheduling pass - scheduler changes [2/3] Andrey Belevantsev
2008-06-03 22:03 ` Vladimir Makarov
2008-08-22 15:52 ` Andrey Belevantsev
2008-06-03 14:28 ` Selective scheduling pass - target changes (ia64 & rs6000) [3/3] Andrey Belevantsev
2008-08-22 16:04 ` Andrey Belevantsev
2008-08-29 13:41 ` [Ping] [GWP/ia64/rs6000 maintainer needed] " Andrey Belevantsev
2008-08-29 15:01 ` Mark Mitchell
2008-09-25 22:39 ` sje
2008-09-26 14:57 ` Andrey Belevantsev
2008-10-03 22:22 ` Steve Ellcey
2008-10-06 17:26 ` Andrey Belevantsev
2008-06-03 22:03 ` [RFC] Selective scheduling pass Vladimir Makarov
2008-06-04 16:55 ` Mark Mitchell
2008-06-04 20:50 ` Andrey Belevantsev
2008-06-05 3:45 ` Seongbae Park (박성배, 朴成培)
2008-06-05 13:49 ` Andrey Belevantsev
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