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Date: Mon, 03 Sep 2012 15:38:00 -0000
From: Eli Zaretskii <eliz@gnu.org>
Subject: Re: PATCH: error reading variable: value has been optimized out
In-reply-to: <20120903112425.GA9954@host2.jankratochvil.net>
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: aburgess@broadcom.com, gdb-patches@sourceware.org
Reply-to: Eli Zaretskii <eliz@gnu.org>
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References: <50376F3B.1080407@broadcom.com> <20120826171840.GA21205@host2.jankratochvil.net> <504092C0.2000602@broadcom.com> <83harip386.fsf@gnu.org> <20120903112425.GA9954@host2.jankratochvil.net>
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> Date: Mon, 3 Sep 2012 13:24:25 +0200
> From: Jan Kratochvil <jan.kratochvil@redhat.com>
> Cc: Andrew Burgess <aburgess@broadcom.com>, gdb-patches@sourceware.org
> 
> On Sat, 01 Sep 2012 10:16:41 +0200, Eli Zaretskii wrote:
> > > [...] but as gcc is no longer creating examples like this I think we can
> > > accept the more limited solution I originally suggessted, if that's ok.
> > 
> > "No longer creating" since what version of GCC?
> 
> I did not check this specific case but these kinds of registers validity in
> general are fixed since FSF GCC 4.5 with the introduction of VTA
> (-fvar-tracking-assignments).

OK, thanks.  I hope it will be possible to support older versions as
well.  E.g., fencepost.gnu.org has this installed:

  eliz@fencepost:~$ gcc --version
  gcc (Ubuntu 4.4.3-4ubuntu5.1) 4.4.3
  Copyright (C) 2009 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.