From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5258 invoked by alias); 16 Oct 2014 09:50:07 -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 5205 invoked by uid 48); 16 Oct 2014 09:50:03 -0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/63551] [4.9/5 Regression] wrong code (segfaults) at -Os on x86_64-linux-gnu Date: Thu, 16 Oct 2014 09:50:00 -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: 5.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org 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: 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: 2014-10/txt/msg01234.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63551 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jamborm at gcc dot gnu.org --- Comment #2 from Richard Biener --- I guess we somehow miss the punning through the union makes '4294967286' signed '-10'. Analyzing function: fn2/3 function fn2/3 parameter descriptors: Jump functions of caller fn2/3: callsite fn2/3 -> fn1/2 : param 0: UNKNOWN Aggregate passed by value: offset: 0, cst: 4294967286