From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13589 invoked by alias); 19 Aug 2015 02:08:24 -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 12080 invoked by uid 48); 19 Aug 2015 02:08:11 -0000 From: "danielmicay at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/67265] [x86] 'asm' operand has impossible constraints with -fstack-check Date: Wed, 19 Aug 2015 02:08:00 -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: 5.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: danielmicay at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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: 2015-08/txt/msg01296.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67265 Daniel Micay changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |danielmicay at gmail dot com --- Comment #3 from Daniel Micay --- It only temporarily needs a register to perform a write. The implementation might currently have to reserve it but it *shouldn't* have to. It should be free other than guaranteeing a one byte write per page.