From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13781 invoked by alias); 9 Feb 2015 23:35:11 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 13670 invoked by uid 48); 9 Feb 2015 23:35:07 -0000 From: "law at redhat dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/64916] ira.c update_equiv_regs patch causes gcc/testsuite/gcc.target/arm/pr43920-2.c regression Date: Mon, 09 Feb 2015 23:35:00 -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: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: law at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: short_desc Message-ID: In-Reply-To: References: 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: 2015-02/txt/msg00896.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64916 Jeffrey A. Law changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[5 regression] ira.c |ira.c update_equiv_regs |update_equiv_regs patch |patch causes |causes |gcc/testsuite/gcc.target/ar |gcc/testsuite/gcc.target/ar |m/pr43920-2.c regression |m/pr43920-2.c regression | --- Comment #3 from Jeffrey A. Law --- Removing the regression marker. This testcase depended in incorrect behaviour of update_equiv_regs. So it's clearly a missed optimization, it does not qualify as a regression IMO. In particular note that r110 can have two values (0 or -1) thus creating a REG_EQUIV note for r110 anywhere is wrong.