From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 976 invoked by alias); 2 Sep 2011 09:43:26 -0000 Received: (qmail 967 invoked by uid 22791); 2 Sep 2011 09:43:26 -0000 X-SWARE-Spam-Status: No, hits=-2.9 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; Fri, 02 Sep 2011 09:43:12 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/50251] [4.7 Regression] Revision 178353 caused many test failures Date: Fri, 02 Sep 2011 09:43:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Keywords: 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: vries at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 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 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: 2011-09/txt/msg00118.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50251 --- Comment #13 from Richard Guenther 2011-09-02 09:42:13 UTC --- (In reply to comment #6) > fold_builtin_alloca_for_var should record stack alignment > change due to > > + /* Declare array. */ > + elem_type = build_nonstandard_integer_type (BITS_PER_UNIT, 1); > + n_elem = size * 8 / BITS_PER_UNIT; > + align = MIN (size * 8, BIGGEST_ALIGNMENT); > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > + array_type = build_array_type_nelts (elem_type, n_elem); > + var = create_tmp_var (array_type, NULL); > + DECL_ALIGN (var) = align; > + If the stack alignment code cannot handle decls with any DECL_ALIGN it is broken. We for sure do not need to do anything here nor in the vectorizer, which does if (vect_can_force_dr_alignment_p (decl, alignment)) { DECL_ALIGN (decl) = TYPE_ALIGN (vectype); DECL_USER_ALIGN (decl) = 1;