From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-367942-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 489 invoked by alias); 20 May 2014 00:25:58 -0000
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Received: (qmail 478 invoked by uid 89); 20 May 2014 00:25:58 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-oa0-f48.google.com
Received: from mail-oa0-f48.google.com (HELO mail-oa0-f48.google.com) (209.85.219.48) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Tue, 20 May 2014 00:25:57 +0000
Received: by mail-oa0-f48.google.com with SMTP id i4so7089426oah.35        for <gcc-patches@gcc.gnu.org>; Mon, 19 May 2014 17:25:55 -0700 (PDT)
MIME-Version: 1.0
X-Received: by 10.182.241.67 with SMTP id wg3mr40150681obc.16.1400545555078; Mon, 19 May 2014 17:25:55 -0700 (PDT)
Received: by 10.76.151.198 with HTTP; Mon, 19 May 2014 17:25:54 -0700 (PDT)
In-Reply-To: <20140519213711.GA7349@arm.com>
References: <53764FB9.6000000@redhat.com>	<20140519213711.GA7349@arm.com>
Date: Tue, 20 May 2014 00:25:00 -0000
Message-ID: <CAMe9rOoCgGbnUuRhTf+8wp322qVH70nYZWni0erewMNPuSyp7A@mail.gmail.com>
Subject: Re: patch to fix PR60969
From: "H.J. Lu" <hjl.tools@gmail.com>
To: James Greenhalgh <james.greenhalgh@arm.com>
Cc: Vladimir Makarov <vmakarov@redhat.com>, GCC Patches <gcc-patches@gcc.gnu.org>
Content-Type: text/plain; charset=UTF-8
X-IsSubscribed: yes
X-SW-Source: 2014-05/txt/msg01557.txt.bz2

On Mon, May 19, 2014 at 2:37 PM, James Greenhalgh
<james.greenhalgh@arm.com> wrote:
> On Fri, May 16, 2014 at 06:49:45PM +0100, Vladimir Makarov wrote:
>>    The following patch fixes
>>
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60969
>>
>> The patch was bootstrapped and tested on x86/x86-64.
>>
>> Committed as rev. 210519 to gcc 4.9 branch and as rev. 210520 to trunk.
>>
>> 2014-05-16  Vladimir Makarov  <vmakarov@redhat.com>
>>
>>          PR rtl-optimization/60969
>>          * ira-costs.c (record_reg_classes): Allow only memory for pseudo.
>>          Calculate costs for this case.
>>
>> 2014-05-16  Vladimir Makarov  <vmakarov@redhat.com>
>>
>>          PR rtl-optimization/60969
>>          * g++.dg/pr60969.C: New.
>
> This seems to have cause gcc.target/aarch64/vect-abs-compile.c to begin
> failing on aarch64-none-elf:
>
> FAIL: gcc.target/aarch64/table-intrinsics.c (internal compiler error)
> FAIL: gcc.target/aarch64/table-intrinsics.c (test for excess errors)
> Excess errors:
> /work/gcc-clean/src/gcc/gcc/testsuite/gcc.target/aarch64/table-intrinsics.c:172:1: internal compiler error: Max. number of generated reload insns per insn is achieved (90)
> 0x8923cd lra_constraints(bool)
>         /work/gcc-clean/src/gcc/gcc/lra-constraints.c:4140
> 0x882f62 lra(_IO_FILE*)
>         /work/gcc-clean/src/gcc/gcc/lra.c:2353
> 0x8453f6 do_reload
>         /work/gcc-clean/src/gcc/gcc/ira.c:5457
> 0x8453f6 execute
>         /work/gcc-clean/src/gcc/gcc/ira.c:5618
>

I think x86 backend should disable 3DNOW mode if
3DNOW isn't enabled.  Allowing SFmode with MMX
doesn't buy us anything, but trouble.


-- 
H.J.