From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-372445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 17605 invoked by alias); 31 Oct 2011 08:34:32 -0000
Received: (qmail 17555 invoked by uid 22791); 31 Oct 2011 08:34:32 -0000
X-SWARE-Spam-Status: No, hits=-2.9 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 31 Oct 2011 08:34:18 +0000
From: "mikpe at it dot uu.se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/38644] [4.4/4.5/4.6/4.7 Regression] Optimization flag -O1 -fschedule-insns2 causes wrong code
Date: Mon, 31 Oct 2011 08:34:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mikpe at it dot uu.se
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.4.7
X-Bugzilla-Changed-Fields:
Message-ID: <bug-38644-4-RaAsCAChMX@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-38644-4@http.gcc.gnu.org/bugzilla/>
References: <bug-38644-4@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: 2011-10/txt/msg03189.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38644

--- Comment #57 from Mikael Pettersson <mikpe at it dot uu.se> 2011-10-31 08:32:09 UTC ---
(In reply to comment #56)
> (In reply to comment #54)
> > I tested with GCC 4.6.2 and the patch provided by Mikael Pettersson.  It works
> > for -march=armv4t and -march=armv5t, but not for -march=armv5te:
> > 
> 
> Sebastian,
> 
> Actually you may try this,
> 
> diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
> index aed748c..8269c1a 100755
> --- a/gcc/config/arm/arm.c
> +++ b/gcc/config/arm/arm.c
> @@ -22273,6 +22273,8 @@ thumb1_expand_epilogue (void)
>    gcc_assert (amount >= 0);
>    if (amount)
>      {
> +      emit_insn (gen_blockage ());
> +
>        if (amount < 512)
>         emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx,
>                                GEN_INT (amount)));
> 
> Thanks,
> -Jiangning

Yeah, that should be even better than my patch.  Thanks.