public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/100453] New: wrong code at -O1 and above Date: Thu, 06 May 2021 14:11:57 +0000 [thread overview] Message-ID: <bug-100453-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100453 Bug ID: 100453 Summary: wrong code at -O1 and above Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zhendong.su at inf dot ethz.ch Target Milestone: --- It seems to be a recent regression. [513] % gcctk -v Using built-in specs. COLLECT_GCC=gcctk COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++ --disable-werror --enable-multilib --with-system-zlib Thread model: posix Supported LTO compression algorithms: zlib gcc version 12.0.0 20210506 (experimental) [master revision 1698f496c5e:27b373b33d4:a1ac9ffb5a7f44b2e2633b7265c21ce803c8e854] (GCC) [514] % [514] % gcctk -O0 small.c; ./a.out [515] % gcc110 -O1 small.c; ./a.out [516] % [516] % gcctk -O1 small.c [517] % ./a.out Segmentation fault [518] % [518] % cat small.c struct a { int b : 4; } d; static int c, e; static const struct a f; static void g(const struct a h) { for (; c < 1; c++) d = h; e = h.b; c = h.b; } int main() { g(f); return 0; }
next reply other threads:[~2021-05-06 14:11 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-06 14:11 zhendong.su at inf dot ethz.ch [this message] 2021-05-06 17:34 ` [Bug tree-optimization/100453] [12 Regression] wrong code at -O1 and above since r12-434 jakub at gcc dot gnu.org 2021-05-11 12:24 ` ebotcazou at gcc dot gnu.org 2021-05-12 16:43 ` jamborm at gcc dot gnu.org 2021-05-13 12:25 ` jamborm at gcc dot gnu.org 2021-05-13 13:04 ` ebotcazou at gcc dot gnu.org 2021-05-13 21:27 ` cvs-commit at gcc dot gnu.org 2021-05-13 21:29 ` jamborm at gcc dot gnu.org 2021-05-14 16:24 ` ebotcazou at gcc dot gnu.org 2021-05-15 8:28 ` cvs-commit at gcc dot gnu.org 2021-05-15 8:33 ` jamborm at gcc dot gnu.org 2021-05-16 21:06 ` ebotcazou at gcc dot gnu.org 2021-06-09 21:32 ` pinskia at gcc dot gnu.org 2021-06-15 15:10 ` jamborm at gcc dot gnu.org 2021-06-16 7:25 ` pinskia at gcc dot gnu.org 2021-06-16 11:24 ` cvs-commit at gcc dot gnu.org 2021-06-16 11:31 ` jamborm 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-100453-4@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: linkBe 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).