public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "spop at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/42326] [4.5 Regression][graphite] segfault in tree-data-ref.c with Graphite building 200.sixtrack
Date: Thu, 04 Mar 2010 22:27:00 -0000	[thread overview]
Message-ID: <20100304222716.12818.qmail@sourceware.org> (raw)
In-Reply-To: <bug-42326-4503@http.gcc.gnu.org/bugzilla/>



------- Comment #12 from spop at gcc dot gnu dot org  2010-03-04 22:27 -------
We are building scalar evolutions that have no defined semantics:
the initial value is variating in an inner loop.

{(2 + (integer(kind=4)) {0, +, 1}_5) * 5 + ((2 + (integer(kind=4)) {0, +, 1}_4)
+ -6), +, 6}_1
and
{(2 + (integer(kind=4)) {0, +, 1}_5) * 5 + -5, +, 6}_1

in the following loop nest:

(gdb) p debug_loops (1)
loop_0 (header = 0, latch = 1, niter = )
{
  loop_1 (header = 3, latch = 14, niter = , upper_bound = 4, estimate = 4)
  {
    loop_4 (header = 6, latch = 11, niter = , upper_bound = 4294967296)
    {
      loop_5 (header = 8, latch = 9, niter = D.1652_117, upper_bound =
4294967296)
      {
      }
    }
  }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42326


  parent reply	other threads:[~2010-03-04 22:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-07 21:23 [Bug tree-optimization/42326] New: " janis at gcc dot gnu dot org
2009-12-08  0:31 ` [Bug tree-optimization/42326] " janis at gcc dot gnu dot org
2009-12-14 19:25 ` spop at gcc dot gnu dot org
2009-12-14 19:41 ` spop at gcc dot gnu dot org
2009-12-14 21:38 ` dominiq at lps dot ens dot fr
2009-12-15 13:50 ` rguenth at gcc dot gnu dot org
2009-12-15 13:51 ` [Bug tree-optimization/42326] [4.5 Regression] " rguenth at gcc dot gnu dot org
2010-01-07 22:07 ` janis at gcc dot gnu dot org
2010-02-23 21:17 ` [Bug tree-optimization/42326] [4.5 Regression][graphite] " janis at gcc dot gnu dot org
2010-02-27 13:54 ` p dot vanhoof at oma dot be
2010-03-02 11:39 ` spop at gcc dot gnu dot org
2010-03-02 11:52 ` spop at gcc dot gnu dot org
2010-03-04 22:27 ` spop at gcc dot gnu dot org [this message]
2010-03-05  9:39 ` spop at gcc dot gnu dot org
2010-03-05 12:21 ` spop at gcc dot gnu dot org
2010-03-05 20:38 ` spop at gcc dot gnu dot org
2010-03-05 20:39 ` spop at gcc dot gnu dot org
2010-03-07 14:12 ` p dot vanhoof at oma dot be
2010-03-07 14:43 ` hjl dot tools at gmail dot com
2010-03-08 17:49 ` spop at gcc dot gnu dot org
2010-03-08 17:52 ` spop at gcc dot gnu dot org

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20100304222716.12818.qmail@sourceware.org \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).