From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-190051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 26285 invoked by alias); 26 Jun 2006 18:54:36 -0000
Received: (qmail 26245 invoked by uid 48); 26 Jun 2006 18:54:28 -0000
Date: Mon, 26 Jun 2006 19:13:00 -0000
Message-ID: <20060626185428.26244.qmail@sourceware.org>
X-Bugzilla-Reason: CC
References: <bug-27363-12620@http.gcc.gnu.org/bugzilla/>
Subject: [Bug target/27363] ARM gcc 4.1 optimization bug
In-Reply-To: <bug-27363-12620@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
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: 2006-06/txt/msg02336.txt.bz2
List-Id: <gcc-bugs.sourceware.org>



------- Comment #8 from rguenth at gcc dot gnu dot org  2006-06-26 18:54 -------
One thing we have is some extra virtual operands from CCP:

before:

<bb 2>:
mask_5 = &old;
v_7 = mask_6;
#   SFT.2_33 = V_MAY_DEF <SFT.2_32>;
*mask_5 = *v_7;
mask_8 = mask_6;
v_10 = v_9;
i_11 = 0;
goto <bb 4> (<L4>);



after:

<bb 2>:
mask_5 = &old;
v_7 = mask_6;
#   SFT.2 = V_MUST_DEF <SFT.2>;
#   VUSE <SFT.2>;
old = *v_7;
mask_8 = mask_6;
v_10 = v_9;
i_11 = 0;
goto <bb 4> (<L4>);

all of the SFT.2 are actually the same tree object.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dberlin at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363