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/103417] New: wrong code at -O1 and above on x86_64-linux-gnu Date: Wed, 24 Nov 2021 20:49:58 +0000 [thread overview] Message-ID: <bug-103417-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103417 Bug ID: 103417 Summary: wrong code at -O1 and above on x86_64-linux-gnu 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: --- This appears to be a recent regression. [557] % 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 20211124 (experimental) [master r12-5505-g5deacf6058d] (GCC) [558] % [558] % gcctk -O0 small.c; ./a.out [559] % [559] % gcctk -O1 small.c [560] % ./a.out Aborted [561] % [561] % cat small.c struct { int a : 8; int b : 24; } c = {0, 1}; int main() { if (c.b && !c.b) __builtin_abort(); return 0; }
next reply other threads:[~2021-11-24 20:49 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-24 20:49 zhendong.su at inf dot ethz.ch [this message] 2021-11-24 21:02 ` [Bug tree-optimization/103417] " pinskia at gcc dot gnu.org 2021-11-24 21:02 ` [Bug tree-optimization/103417] [12 Regression] " pinskia at gcc dot gnu.org 2021-11-24 21:03 ` [Bug tree-optimization/103417] [12 Regression] wrong code at -O1 and above on x86_64-linux-gnu since r12-5489 jakub at gcc dot gnu.org 2021-11-24 21:16 ` jakub at gcc dot gnu.org 2021-11-24 21:45 ` jakub at gcc dot gnu.org 2021-11-25 2:44 ` tnfchris at gcc dot gnu.org 2021-11-25 9:48 ` cvs-commit at gcc dot gnu.org 2021-11-25 15:22 ` 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-103417-4@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).