public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/102586] [12 Regression] ICE in clear_padding_type, at gimple-fold.c:4798 since r12-3433-ga25e0b5e6ac8a77a
Date: Sat, 12 Mar 2022 04:40:38 +0000 [thread overview]
Message-ID: <bug-102586-4-2bHfOEQJni@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-102586-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102586
--- Comment #28 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Qing Zhao from comment #27)
> Does this issue only exist with -flifetime-dse=2?
> When -flifetime-dse=2, the call to __builtin_clear_padding should be
> inserted AFTER the start point of the constructor of the object, otherwise
> it’s dead and will be eliminated by DSE.
> And with -flifetime-dse=2, the padding initialization should be done by C++
> FE instead of middle end.
> Is this understanding correct?
Yes, -flifetime-dse=2 conflicts with -ftrivial-auto-var-init in that both are
trying to define the initial state of the variable.
Perhaps -ftrivial-auto-var-init should lower to -flifetime-dse=1.
Or change build_clobber_this to do the specified initialization instead of a
clobber, though that would mean doing the initialization for any object of that
type, not just automatics.
next prev parent reply other threads:[~2022-03-12 4:40 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 7:30 [Bug tree-optimization/102586] New: " marxin at gcc dot gnu.org
2021-10-04 7:30 ` [Bug tree-optimization/102586] " marxin at gcc dot gnu.org
2021-10-04 8:21 ` jakub at gcc dot gnu.org
2021-10-04 8:22 ` marxin at gcc dot gnu.org
2021-10-04 11:43 ` jakub at gcc dot gnu.org
2021-10-04 12:04 ` jakub at gcc dot gnu.org
2021-11-15 13:03 ` jakub at gcc dot gnu.org
2021-11-15 13:05 ` jakub at gcc dot gnu.org
2022-01-17 13:14 ` rguenth at gcc dot gnu.org
2022-02-09 17:21 ` jason at gcc dot gnu.org
2022-02-10 14:08 ` jakub at gcc dot gnu.org
2022-02-10 14:18 ` jakub at gcc dot gnu.org
2022-02-10 15:29 ` jakub at gcc dot gnu.org
2022-02-10 15:35 ` jakub at gcc dot gnu.org
2022-02-10 15:56 ` jason at gcc dot gnu.org
2022-02-10 18:30 ` jakub at gcc dot gnu.org
2022-02-10 18:45 ` jason at gcc dot gnu.org
2022-02-10 19:27 ` jakub at gcc dot gnu.org
2022-02-10 22:07 ` jason at gcc dot gnu.org
2022-02-10 22:27 ` jakub at gcc dot gnu.org
2022-02-10 22:29 ` jakub at gcc dot gnu.org
2022-02-10 22:34 ` jakub at gcc dot gnu.org
2022-02-11 1:47 ` rodgertq at gcc dot gnu.org
2022-02-11 12:31 ` jakub at gcc dot gnu.org
2022-02-11 15:29 ` jason at gcc dot gnu.org
2022-02-11 16:23 ` qing.zhao at oracle dot com
2022-02-11 16:39 ` jakub at gcc dot gnu.org
2022-02-11 17:36 ` qinzhao at gcc dot gnu.org
2022-02-11 17:47 ` jakub at gcc dot gnu.org
2022-02-11 21:52 ` qing.zhao at oracle dot com
2022-03-12 4:40 ` jason at gcc dot gnu.org [this message]
2022-03-14 9:49 ` cvs-commit at gcc dot gnu.org
2022-04-07 7:15 ` cvs-commit at gcc dot gnu.org
2022-04-07 7:19 ` jakub 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-102586-4-2bHfOEQJni@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).