From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 34885 invoked by alias); 2 Jul 2015 12:44:47 -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 34850 invoked by uid 48); 2 Jul 2015 12:44:44 -0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/66739] [6 regression] FAIL: gcc.target/aarch64/subs.c scan-assembler subs\tw[0-9] Date: Thu, 02 Jul 2015 12:44:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 6.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 6.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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: 2015-07/txt/msg00165.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66739 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |law at gcc dot gnu.org --- Comment #3 from Richard Biener --- This case is special in the sense that a - b on some targets already computes a - b != 0 but we don't have any way to represent this on GIMPLE. This also only works when a - b is computed "close" to the comparison.