From: Sergei Organov <osv@topconrd.ru>
To: Andrew Haley <aph@redhat.com>
Cc: gcc@gcc.gnu.org
Subject: Re: How to replace -O1 with corresponding -f's?
Date: Mon, 20 Jun 2005 14:28:00 -0000 [thread overview]
Message-ID: <874qbt9k6k.fsf@osv.topcon.com> (raw)
In-Reply-To: <17078.52477.408454.106678@zapata.pink>
Andrew Haley <aph@redhat.com> writes:
> Sergei Organov writes:
> > Hi,
> >
> > Using gcc compiled from gcc-4_0-branch, in an attempt to see which
> > particular optimization option makes my test case to be mis-optimized, I
> > try to replace -O1 (which toggles on the problem) with corresponding set
> > of -fxxx optimization options.
>
> In general you can't do this. You can turn some optimization passes
> off, though.
Sigh :(
>
> > How one finds out what optimization pass misbehaves?
>
> Look at the dumps. If you use the gcc option -da you'll get a full
> set of RTL dump files.
I'm afraid that it's one of the tree optimization passes as
const.cc.00.expand is already [mis]optimized the way I don't like.
--
Sergei.
next prev parent reply other threads:[~2005-06-20 14:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-20 13:40 Sergei Organov
2005-06-20 14:04 ` Andrew Haley
2005-06-20 14:26 ` Andrew Pinski
2005-06-20 14:55 ` Sergei Organov
2005-06-20 15:01 ` Andrew Pinski
2005-06-20 15:29 ` Sergei Organov
2005-06-20 15:36 ` Andrew Pinski
2005-06-20 15:58 ` Sergei Organov
2005-06-21 9:55 ` Michael Meissner
2005-06-21 12:49 ` Sergei Organov
2005-06-20 17:18 ` Sergei Organov
2005-06-24 16:09 ` Sergei Organov
2005-06-20 14:28 ` Sergei Organov [this message]
2005-06-22 19:29 ` Zack Weinberg
2005-06-20 14:25 ` Scott Robert Ladd
2005-06-20 14:35 ` Andrew Pinski
2005-06-20 15:04 ` Sergei Organov
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