From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 39514 invoked by alias); 13 Oct 2015 19:44:35 -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 39433 invoked by uid 48); 13 Oct 2015 19:44:31 -0000 From: "rsandifo at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/67945] [6 Regression] Testsuite failures starting with revision 228616 Date: Tue, 13 Oct 2015 19:44:00 -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: 6.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: rsandifo at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rsandifo at gcc dot gnu.org X-Bugzilla-Target-Milestone: 6.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: 2015-10/txt/msg01062.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67945 --- Comment #8 from rsandifo at gcc dot gnu.org --- Actually, the problem seems to be that we're oscillating between forms. The old fold-const.c folders converted sequences of sqrts and cbrts into a pow call while tree-ssa-math-opts.c goes the other way. In that situation things were well-controlled: we did both transformations only once, in that order. Moving the fold-const.c folders to match.pd means that we try them many times and that ultimately they win.