From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30733 invoked by alias); 19 Feb 2014 10:18:25 -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 30679 invoked by uid 48); 19 Feb 2014 10:18:20 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/59193] Unused postfix operator temporaries Date: Wed, 19 Feb 2014 10:18:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: minor X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: RESOLVED 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: 2014-02/txt/msg01947.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59193 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #7 from Jakub Jelinek --- Also note that even at -O0, at no point during compilation with GCC/G++ if the value of ++a or a++ isn't used and a has integral/pointer type one form is more efficient than the other. It is just a different tree code ({PRE,POST}{IN,DE}CREMENT_EXPR), but with the same operand, type etc. So, there is no waste of any resources, it is not a defect to use either style, it is purely coding convention matter.