From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-464267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 2941 invoked by alias); 16 Oct 2014 16:14:50 -0000
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
Received: (qmail 2923 invoked by uid 89); 16 Oct 2014 16:14:49 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.4 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_LOW,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2
X-Spam-User: qpsmtpd, 2 recipients
X-HELO: atrey.karlin.mff.cuni.cz
Received: from atrey.karlin.mff.cuni.cz (HELO atrey.karlin.mff.cuni.cz) (195.113.26.193) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 16 Oct 2014 16:14:48 +0000
Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 4018)	id 12D3381C97; Thu, 16 Oct 2014 18:14:45 +0200 (CEST)
Date: Thu, 16 Oct 2014 16:14:00 -0000
From: Jan Hubicka <hubicka@ucw.cz>
To: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
Cc: gcc-bugs@gcc.gnu.org
Subject: Re: [Bug lto/63546] ICE: Segmentation fault in lto_get_decl_name_mapping on ppc64
Message-ID: <20141016161445.GD11581@atrey.karlin.mff.cuni.cz>
References: <bug-63546-4@http.gcc.gnu.org/bugzilla/> <bug-63546-4-InYph6rACk@http.gcc.gnu.org/bugzilla/>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <bug-63546-4-InYph6rACk@http.gcc.gnu.org/bugzilla/>
User-Agent: Mutt/1.5.21 (2010-09-15)
X-IsSubscribed: yes
X-SW-Source: 2014-10/txt/msg01288.txt.bz2

> 
> Commenting that out will severely decrease debug info quality.

It was meant as a workaround for PPC Firefox builds ;)

> Yes, dwarf2out really needs a RTL for those, and some that will not affect
> -fcompare-debug, with the right (mangled?) name of the var and various other
> attributes on the MEM.

Why are those needed for variables that was fully optimized out?  Mangled name
is acccessible via DECL_ASSEMBLER_NAME, so it may be prettier if dwarf2out
took it directly from DECL rather than going to RTL.

I suppose one can bypass the whole ancros machinery for those and avoid the
ICE. Produced RTL however won't be useful for any real work on it.

Honza