From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id E37C43857C7C; Wed, 19 Aug 2020 13:30:52 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E37C43857C7C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1597843852; bh=DezCj9N+anU434qlcJg/LE29zYH5bYuY6hpLeqlRvJg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Lpijyl3Ycx71hztAxSov5PpePVg0Sx4ElyBxLHrLJ7ZVwvx1uY8wtHfw7m4lXQFIp GwlUOLPimfN/i2h3u1J70tsMa+LjE5FK/2plpkJcAUM9TF8T8yzmVbyxc/VSzR/VzU RBpmBO8/ebTI+GziY1UQixQ/OxGkq3tD+EIAefds= From: "gabravier at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/96708] Failure to optimize max pattern with comparison when using a temporary variable Date: Wed, 19 Aug 2020 13:30:52 +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: 11.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: gabravier 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: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Aug 2020 13:30:53 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96708 --- Comment #1 from Gabriel Ravier --- PS: This especially affects, for example, C++ code that uses std::max, which fails to optimize properly compared to, for example, a `max` macro.=