From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-395236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 12728 invoked by alias); 28 Jun 2012 10:08:41 -0000
Received: (qmail 12691 invoked by uid 22791); 28 Jun 2012 10:08:40 -0000
X-SWARE-Spam-Status: No, hits=-4.3 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED
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, 28 Jun 2012 10:08:27 +0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/53787] Possible IPA-SRA / IPA-CP improvement
Date: Thu, 28 Jun 2012 10:08:00 -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-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: WAITING
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields: Keywords CC Component Summary
Message-ID: <bug-53787-4-Gzzq7UlfQB@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-53787-4@http.gcc.gnu.org/bugzilla/>
References: <bug-53787-4@http.gcc.gnu.org/bugzilla/>
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: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-06/txt/msg01863.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53787

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
                 CC|                            |jamborm at gcc dot gnu.org
          Component|lto                         |tree-optimization
            Summary|Possible lto improvement    |Possible IPA-SRA / IPA-CP
                   |                            |improvement

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-28 10:08:13 UTC ---
This has nothing to do with LTO - with a single compilation unit you can
use -fwhole-program.  The issue is that Fortran passes parameters by reference
and our interprocedural constant-propagation pass does not know how to deal
with that.  The IPA SRA pass which is supposed to "fix" that decides that
init cannot have its signature changed.  Martin, can you check why?
I think we ought to optimize this with -O3 -fwhole-program -fno-inline.