public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107493] [13 Regression] Wrong code at -Os on x86_64-linux-gnu
Date: Tue, 01 Nov 2022 15:25:26 +0000 [thread overview]
Message-ID: <bug-107493-4-FNsIZHasx3@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-107493-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107493
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |12.1.0
Last reconfirmed| |2022-11-01
Known to fail| |13.0
Ever confirmed|0 |1
Summary|Wrong code at -Os on |[13 Regression] Wrong code
|x86_64-linux-gnu |at -Os on x86_64-linux-gnu
Target Milestone|--- |13.0
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
sccp is broken:
Estimating # of iterations of loop 1
Statement (exit)if (a_lsm.10_13 <= 0)
is executed at most 0 (bounded by 0) + 1 times in loop 1.
Induction variable (int) 65517 + 10 * iteration does not wrap in statement _1 =
a_lsm.10_13 + 2;
in loop 1.
Statement _1 = a_lsm.10_13 + 2;
is executed at most 429490178 (bounded by 429490178) + 1 times in loop 1.
Induction variable (int) 65525 + 10 * iteration does not wrap in statement _4 =
(int) _3;
in loop 1.
Statement _4 = (int) _3;
is executed at most 1 (bounded by 1) + 1 times in loop 1.
final value replacement:
a_lsm.10_14 = PHI <a_lsm.10_13(4)>
with expr: 65515
final stmt:
a_lsm.10_14 = 65515;
Confirmed.
next prev parent reply other threads:[~2022-11-01 15:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-01 11:49 [Bug c/107493] New: " shaohua.li at inf dot ethz.ch
2022-11-01 15:25 ` pinskia at gcc dot gnu.org [this message]
2022-11-01 15:27 ` [Bug tree-optimization/107493] [13 Regression] " pinskia at gcc dot gnu.org
2022-11-05 10:37 ` rguenth at gcc dot gnu.org
2022-11-08 13:29 ` rguenth at gcc dot gnu.org
2022-11-21 12:17 ` [Bug tree-optimization/107493] [13 Regression] Wrong code at -Os on x86_64-linux-gnu since r13-3486-g4c5b116077638277 marxin at gcc dot gnu.org
2022-11-22 8:09 ` rguenth at gcc dot gnu.org
2022-11-28 10:17 ` cvs-commit at gcc dot gnu.org
2022-11-28 10:18 ` rguenth at gcc dot gnu.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=bug-107493-4-FNsIZHasx3@http.gcc.gnu.org/bugzilla/ \
--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).