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[Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
- From: "rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 18 Jan 2009 17:21:02 -0000
- Subject: [Bug middle-end/38905] [4.3 Regression] 464.h264ref in SPEC CPU 2006 miscompiled
- References: <bug-38905-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from rguenther at suse dot de 2009-01-18 17:21 -------
Subject: Re: [4.3 Regression] 464.h264ref in SPEC
CPU 2006 miscompiled
On Sun, 18 Jan 2009, hjl dot tools at gmail dot com wrote:
> ------- Comment #2 from hjl dot tools at gmail dot com 2009-01-18 17:19 -------
> (In reply to comment #1)
> > It is caused by revision 142040:
> >
> > http://gcc.gnu.org/ml/gcc-cvs/2008-11/msg00541.html
> >
>
> The patch is at
>
> http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01040.html
Can you check if it is fixed by -fno-strict-aliasing and/or
--param max-fields-for-field-sensitive=0? I suspect we need to
backport some PTA fixes :/
Richard.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38905