From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-407994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 10915 invoked by alias); 28 Nov 2012 03:14:21 -0000
Received: (qmail 10808 invoked by uid 48); 28 Nov 2012 03:14:04 -0000
From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/55426] gcc.target/arm/neon-vld1_dupQ.c ICEs on armeb
Date: Wed, 28 Nov 2012 03:14:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ramana at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields: CC
Message-ID: <bug-55426-4-ckO1vXnu0k@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-55426-4@http.gcc.gnu.org/bugzilla/>
References: <bug-55426-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-11/txt/msg02656.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55426

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ramana at gcc dot gnu.org

--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2012-11-28 03:14:03 UTC ---
(In reply to comment #2)
> (In reply to comment #1)
> > Reverting the definition of CANNOT_CHANGE_MODE_CLASS introduced on 2012-10-22
> > at rev #192687 avoids the ICE too.
> 
> I have tried this, reverting the revision #192687 would fix this issue. But as 
> the comment of the patch specifies 
> "In big-endian mode, modes greater than word size (i.e. DFmode) are stored in
> VFP registers in little-endian order.  We can't describe that accurately to
> GCC, so avoid taking subregs of such values.".
> 
> Reverting the patch would adversely affect the big-endian toolchain. Hence, I
> assume that we should have an alternate fix.
(In reply to comment #2)
> (In reply to comment #1)
> > Reverting the definition of CANNOT_CHANGE_MODE_CLASS introduced on 2012-10-22
> > at rev #192687 avoids the ICE too.
> 
> I have tried this, reverting the revision #192687 would fix this issue. But as 
> the comment of the patch specifies 
> "In big-endian mode, modes greater than word size (i.e. DFmode) are stored in
> VFP registers in little-endian order.  We can't describe that accurately to
> GCC, so avoid taking subregs of such values.".
> 
> Reverting the patch would adversely affect the big-endian toolchain. Hence, I
> assume that we should have an alternate fix.

We do have w-w moves in vfp.md *movdi_vfp and friends. why doesn't that work
for you ?

Ramana