From: "Martin Liška" <mliska@suse.cz>
To: Eric Botcazou <ebotcazou@adacore.com>,
Richard Biener <richard.guenther@gmail.com>
Cc: gcc-patches@gcc.gnu.org, Jakub Jelinek <jakub@redhat.com>
Subject: Re: [RFC] [PATCH] Introduce configure flag --with-stage1-cflags.
Date: Tue, 30 May 2017 10:33:00 -0000 [thread overview]
Message-ID: <501b870c-ab03-319b-e174-47f63813f1f9@suse.cz> (raw)
In-Reply-To: <8222700.x4IQrGbyC3@polaris>
On 05/30/2017 11:43 AM, Eric Botcazou wrote:
>> Are you sure? In my experience -O2 gets the most test coverage during
>> lifetime of a particular release.
>
> Yes, some older GCC releases have aliasing issues that are exposed at -O2 only
> because of -fstrict-aliasing and -fschedule-insns.
>
That's why we decided to enable -O2 just with GCC 4.8+.
Martin
next prev parent reply other threads:[~2017-05-30 10:30 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-25 9:26 Martin Liška
2017-05-26 11:47 ` Richard Biener
2017-05-26 11:55 ` Jakub Jelinek
2017-05-26 11:59 ` Richard Biener
2017-05-26 13:02 ` Martin Liška
2017-05-26 13:19 ` Martin Liška
2017-06-19 10:51 ` Martin Liška
2017-06-19 12:30 ` Richard Biener
2017-07-31 7:48 ` Martin Liška
2017-08-25 20:49 ` Jeff Law
2017-08-28 12:55 ` Richard Biener
2017-08-30 12:19 ` Martin Liška
2017-05-29 11:35 ` Eric Botcazou
2017-05-30 7:00 ` Richard Biener
2017-05-30 10:30 ` Eric Botcazou
2017-05-30 10:33 ` Martin Liška [this message]
2017-05-30 11:12 ` Eric Botcazou
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