From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22300 invoked by alias); 3 Jul 2013 16:25:38 -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 22273 invoked by uid 48); 3 Jul 2013 16:25:35 -0000 From: "pchang9 at cs dot wisc.edu" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/57802] New: Waste work in set_loop_bounds() Date: Wed, 03 Jul 2013 16:25:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pchang9 at cs dot wisc.edu X-Bugzilla-Status: UNCONFIRMED 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: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc Message-ID: 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: 2013-07/txt/msg00168.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57802 Bug ID: 57802 Summary: Waste work in set_loop_bounds() Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: pchang9 at cs dot wisc.edu CC: nistor1 at illinois dot edu The problem appears in revision 200588 in version 4.9. In method "set_loop_bounds()" in gcc/fortran/trans-array.c, the loop on line 4456 should break immediately after "nonoptional_arr" is set to "true". All the iterations after "nonoptional_arr" set to "true" do not perform any useful work, at best they just set "nonoptional_arr" again to "true".