From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3323 invoked by alias); 29 Sep 2014 18:50:28 -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 3276 invoked by uid 48); 29 Sep 2014 18:50:25 -0000 From: "jiwang at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/63404] [5 Regression] gcc 5 miscompiles linux block layer Date: Mon, 29 Sep 2014 18:50:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jiwang at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: jiwang at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: 2014-09/txt/msg02713.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63404 --- Comment #8 from Jiong Wang --- (In reply to Pat Haugen from comment #6) > (In reply to Jiong Wang from comment #5) > > we need to check the following > > > > else if (GET_CODE == CLOBBER > > || GET_CODE (x) == USE > > || GET_CODE (x) == ASM_INPUT) > > > > I will post the fix after pass x86 bootstrap and regression > > r215563 also introduced a miscompare on PowerPC for cpu2000 benchmark > 254.gap. Applying your patch proposed on the gcc-patches ml for this bug > fixes the issue. and I am curious about whether there are any performance change since this insn sink change.