From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29385 invoked by alias); 16 Dec 2010 15:24:40 -0000 Received: (qmail 29312 invoked by uid 22791); 16 Dec 2010 15:24:39 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 16 Dec 2010 15:24:35 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/46926] Paired sin() cos() calls optimized to sincos() call. X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Thu, 16 Dec 2010 15:24:00 -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 X-SW-Source: 2010-12/txt/msg01989.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46926 --- Comment #6 from Richard Guenther 2010-12-16 15:24:23 UTC --- (In reply to comment #5) > That is what the built_in_decls vs. implicit_built_in_decls distinction is for. > Except that for sincos, being a POSIX but not C function, > implicit_built_in_decls[BUILT_IN_SINCOS] is always NULL. Which is why we have TARGET_HAS_SINCOS ... I don't see an existing way to pass the requested information from the C frontend. We also can't avoid the transformation based on the function name as that function might be called by a user function named sincos. Maybe the _EXT builtins shouldn't be in built_in_decls as well unless -std=gnuXX is used. I suppose -fno-builtin-sincos does work as a workaround though.