From: Jan Hubicka <hubicka@ucw.cz>
To: Pat Haugen <pthaugen@linux.vnet.ibm.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>,
David Edelsohn <dje.gcc@gmail.com>
Subject: Re: [PATCH, rs6000] Update default loop peel limits
Date: Thu, 06 Dec 2012 21:43:00 -0000 [thread overview]
Message-ID: <20121206214313.GG671@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <50C0FCDE.5010508@linux.vnet.ibm.com>
> The following patch restores the old default limits for loop peeling
> that were recently changed to 100 and caused a 20% degradation in
> 454.calculix.
>
> Bootstrap/regtest on powerpc64-linux with no new regressions. Ok for trunk?
>
> -Pat
>
>
> 2012-12-06 Pat Haugen <pthaugen@us.ibm.com>
> * config/rs6000/rs6000.c (rs6000_option_override_internal): Set
> default loop peeling limits.
Actually the calculix regression is also seen on core.
Igor was looking into what loops got slower and why. Either we can fix that partiuclar
loop or revert to the old default (that sadly causes quite a lot of code bloat)
Honza
next prev parent reply other threads:[~2012-12-06 21:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-06 20:16 Pat Haugen
2012-12-06 20:17 ` David Edelsohn
2012-12-06 21:43 ` Jan Hubicka [this message]
2012-12-07 9:05 ` Richard Biener
2012-12-07 16:43 ` Jan Hubicka
2012-12-07 16:52 ` Michael Matz
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