From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-147110-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 2695 invoked by alias); 6 Jun 2008 20:18:27 -0000
Received: (qmail 2687 invoked by uid 22791); 6 Jun 2008 20:18:25 -0000
X-Spam-Check-By: sourceware.org
Received: from smtp-out.google.com (HELO smtp-out.google.com) (216.239.33.17)     by sourceware.org (qpsmtpd/0.31) with ESMTP; Fri, 06 Jun 2008 20:18:08 +0000
Received: from zps18.corp.google.com (zps18.corp.google.com [172.25.146.18]) 	by smtp-out.google.com with ESMTP id m56KI0Gu004567 	for <gcc@gcc.gnu.org>; Fri, 6 Jun 2008 21:18:01 +0100
Received: from rv-out-0506.google.com (rvbk40.prod.google.com [10.140.87.40]) 	by zps18.corp.google.com with ESMTP id m56KHebN001146 	for <gcc@gcc.gnu.org>; Fri, 6 Jun 2008 13:18:00 -0700
Received: by rv-out-0506.google.com with SMTP id k40so1249237rvb.17         for <gcc@gcc.gnu.org>; Fri, 06 Jun 2008 13:18:00 -0700 (PDT)
Received: by 10.141.198.9 with SMTP id a9mr326675rvq.238.1212783480181;         Fri, 06 Jun 2008 13:18:00 -0700 (PDT)
Received: by 10.140.166.5 with HTTP; Fri, 6 Jun 2008 13:18:00 -0700 (PDT)
Message-ID: <c17be2b30806061318w301143b5g1e158b85c5792a3@mail.gmail.com>
Date: Fri, 06 Jun 2008 20:18:00 -0000
From: "Cary Coutant" <ccoutant@google.com>
To: "Kenneth Zadeck" <zadeck@naturalbridge.com>
Subject: Re: ln -r and cherry picking.
Cc: gcc <gcc@gcc.gnu.org>, "Diego Novillo" <dnovillo@google.com>,         "Ollie Wild" <aaw@google.com>, "Maddox, Bill" <maddox@google.com>,         "Rafael Espindola" <espindola@google.com>, "Hubicha, Jan" <jh@suse.cz>
In-Reply-To: <484957E1.9010103@naturalbridge.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <484957E1.9010103@naturalbridge.com>
X-IsSubscribed: yes
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc/>
List-Post: <mailto:gcc@gcc.gnu.org>
List-Help: <http://gcc.gnu.org/ml/>
Sender: gcc-owner@gcc.gnu.org
X-SW-Source: 2008-06/txt/msg00156.txt.bz2

>  2) LTO sections need to be able to find "their index" of decls and
>  types.  By "their index" I mean the index that each section used to
>  reference the decls and types when the section was generated.

Can't you just put an ELF symbol (can be an unnamed local -- could
even just be a section symbol) on the index section, then add a
pointer in the IR section with a relocation to that symbol? This is
basically how DWARF .debug_info sections point to the abbrev table in
the .debug_abbrev sections.

-cary