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From: Dale Johannesen <dalej@apple.com>
To: Richard Henderson <rth@redhat.com>
Cc: Dale Johannesen <dalej@apple.com>,
	gcc-patches@gcc.gnu.org, gcc@gcc.gnu.org
Subject: Re: Another performance regression
Date: Fri, 27 Sep 2002 16:09:00 -0000	[thread overview]
Message-ID: <0840120E-D266-11D6-BBCF-000393D76DAA@apple.com> (raw)
In-Reply-To: <20020926222640.GF7332@redhat.com>


On Thursday, September 26, 2002, at 03:26 PM, Richard Henderson wrote:

> On Thu, Sep 26, 2002 at 12:01:38PM -0700, Dale Johannesen wrote:
>> So should I fix this by making the unrolling code smarter, in effect
>> doing cse's job?
>
> I think so, since the change to loop unrolling order was
> also done to get around a performance regression.  :-/
>
>> It seems likely Roger Sayle's approach of running
>> gcse after loop opts would Just Work.  Is that going to go in?
>
> Not for 3.3.
>
> The following appears to do the job.  Would you see if this
> causes any other problems?

Thanks!
Bootstrapped and tested on Darwin (C, C++, ObjC, f77), no regressions.

      reply	other threads:[~2002-09-27 22:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-26 12:16 Dale Johannesen
2002-09-26 16:07 ` Richard Henderson
2002-09-27 16:09   ` Dale Johannesen [this message]

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