From: Andrew Haley <aph@redhat.com>
To: Sergei Organov <osv@topconrd.ru>
Cc: gcc@gcc.gnu.org
Subject: Re: How to replace -O1 with corresponding -f's?
Date: Mon, 20 Jun 2005 14:04:00 -0000 [thread overview]
Message-ID: <17078.52477.408454.106678@zapata.pink> (raw)
In-Reply-To: <878y159mhr.fsf@osv.topcon.com>
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.
> 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.
Andrew.
next prev parent reply other threads:[~2005-06-20 14:04 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 [this message]
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
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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