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 rtl-optimization/110391] [12/13/14 Regression] wrong code at -O2 and -O3 with "-fsel-sched-pipelining -fselective-scheduling2" on x86_64-linux-gnu Date: Mon, 26 Jun 2023 09:12:15 +0000 [thread overview] Message-ID: <bug-110391-4-gW7LEvz140@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-110391-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110391 --- Comment #2 from Zhendong Su <zhendong.su at inf dot ethz.ch> --- A likely related reproducer that affects 10.* and later. Compiler Explorer: https://godbolt.org/z/KP6PnTKPj [579] % gcctk -v Using built-in specs. COLLECT_GCC=gcctk COLLECT_LTO_WRAPPER=/local/home/suz/suz-local/software/local/gcc-trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk --enable-sanitizers --enable-languages=c,c++ --disable-werror --disable-multilib Thread model: posix Supported LTO compression algorithms: zlib gcc version 14.0.0 20230625 (experimental) [master r14-924-gd709841ae0f] (GCC) [580] % [580] % gcctk -O2 -fsel-sched-pipelining -fschedule-insns -fselective-scheduling2 small.c [581] % ./a.out Floating point exception [582] % [582] % gcctk -O2 small.c; ./a.out [583] % [583] % cat small.c int printf(const char *, ...); int a, d, e = -2; char b; long c = -2; int main() { int g, h; d = e; g = c; L: h = d; c = 1; d = c % ~e; e = e >> ~g; if (e > b) printf("%ld", c); if (g > c) printf("%d", a); if (b) goto L; e = h; return 0; }
next prev parent reply other threads:[~2023-06-26 9:12 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-24 13:17 [Bug rtl-optimization/110391] New: wrong code at -O2 and -O3 with "on x86_64-linux-gnu zhendong.su at inf dot ethz.ch 2023-06-24 13:20 ` [Bug rtl-optimization/110391] wrong code at -O2 and -O3 with "-fsel-sched-pipelining -fselective-scheduling2" on x86_64-linux-gnu zhendong.su at inf dot ethz.ch 2023-06-24 15:23 ` [Bug rtl-optimization/110391] [12/13/14 Regression] " pinskia at gcc dot gnu.org 2023-06-26 9:12 ` zhendong.su at inf dot ethz.ch [this message] 2023-06-29 9:18 ` zhendong.su at inf dot ethz.ch 2023-06-29 17:33 ` zhendong.su at inf dot ethz.ch 2024-03-04 1:49 ` law 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-110391-4-gW7LEvz140@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).