From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-435242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 9611 invoked by alias); 20 Nov 2013 13:55:11 -0000
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
Received: (qmail 9568 invoked by uid 55); 20 Nov 2013 13:55:08 -0000
From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/54300] [4.7, 4.8, 4.9 Regression] regcprop incorrectly looks through parallel register swap operation
Date: Wed, 20 Nov 2013 13:55:00 -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-Version: 4.8.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: major
X-Bugzilla-Who: rearnsha at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.7.4
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-54300-4-FncaG3N6Q9@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-54300-4@http.gcc.gnu.org/bugzilla/>
References: <bug-54300-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2013-11/txt/msg02019.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54300

--- Comment #13 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Wed Nov 20 13:55:04 2013
New Revision: 205117

URL: http://gcc.gnu.org/viewcvs?rev=205117&root=gcc&view=rev
Log:
PR rtl-optimization/54300

gcc/

    PR rtl-optimization/54300
    * regcprop.c (copyprop_hardreg_forward_1): Ensure any unused
    outputs in a single-set are killed from the value chains.

gcc/testsuite:

    PR rtl-optimization/54300
    * gcc.target/arm/pr54300.C: New test.


Added:
    trunk/gcc/testsuite/gcc.target/arm/pr54300.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regcprop.c
    trunk/gcc/testsuite/ChangeLog