From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-398460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 19565 invoked by alias); 13 Aug 2012 10:36:47 -0000
Received: (qmail 19502 invoked by uid 22791); 13 Aug 2012 10:36:46 -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; Mon, 13 Aug 2012 10:36:33 +0000
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/53495] [4.8 Regression] segmentation fault
Date: Mon, 13 Aug 2012 10:36:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.8.0
X-Bugzilla-Changed-Fields: Status AssignedTo
Message-ID: <bug-53495-4-TMJckmfylh@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-53495-4@http.gcc.gnu.org/bugzilla/>
References: <bug-53495-4@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: 2012-08/txt/msg00732.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53495

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-13 10:36:32 UTC ---
Created attachment 28003
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28003
gcc48-pr53495.patch

The problem is that find_moveable_pseudos creates some extra pseudos/def_insns,
but then trivially_dead_insns is called by ira and deletes them (because they
were feeding trivially dead insns only).  Then move_unallocated_pseudos is
called and expects to be able to tweak all the insns find_moveable_pseudos
created.  The attached untested patch fixes that.