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/36630] [4.3/4.4 Regression] ICE in vect_update_ivs_after_vectorizer
Date: Wed, 03 Sep 2008 21:04:00 -0000	[thread overview]
Message-ID: <20080903210249.32250.qmail@sourceware.org> (raw)
In-Reply-To: <bug-36630-87@http.gcc.gnu.org/bugzilla/>



------- Comment #9 from spop at gcc dot gnu dot org  2008-09-03 21:02 -------
Subject: Re:  [4.3/4.4 Regression] ICE in vect_update_ivs_after_vectorizer

> Another thing, 4.4 does not vectorize this loop anymore (and, therefore, there
> is no ICE), because of unknown number of iterations:

I also have remarked on one of the graphite testcases scop-matmult.c
that we had a regression in the precision of the number of iterations from
last graphite merge till yesterday's merge, i.e. from 138275 to 139870
We used to have a symbolic number of iterations, but now the result
is scev_dont_know.  I have not yet tracked this down to the patch that
produced this regression.

Sebastian


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36630


  parent reply	other threads:[~2008-09-03 21:04 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-25 12:48 [Bug tree-optimization/36630] New: " jakub at gcc dot gnu dot org
2008-06-25 12:48 ` [Bug tree-optimization/36630] " jakub at gcc dot gnu dot org
2008-06-25 14:28 ` rguenth at gcc dot gnu dot org
2008-06-26 11:58 ` irar at il dot ibm dot com
2008-06-26 12:12 ` rguenther at suse dot de
2008-06-26 18:34 ` irar at il dot ibm dot com
2008-07-10 14:19 ` rguenth at gcc dot gnu dot org
2008-07-16  6:20 ` irar at il dot ibm dot com
2008-07-18 16:53 ` rguenth at gcc dot gnu dot org
2008-08-27 22:13 ` jsm28 at gcc dot gnu dot org
2008-08-28 15:11 ` rguenth at gcc dot gnu dot org
2008-09-03 10:44 ` irar at il dot ibm dot com
2008-09-03 21:04 ` spop at gcc dot gnu dot org [this message]
2008-09-07  7:16 ` irar at gcc dot gnu dot org
2008-09-07 10:08 ` irar at gcc dot gnu dot org
2008-09-07 11:06 ` irar at il dot ibm dot com
2008-09-08  7:46 ` irar at il dot ibm dot com

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=20080903210249.32250.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).