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/115092] New: wrong code at -O1 with "-fgcse -ftree-pre -fno-tree-dominator-opts -fno-tree-fre -fno-guess-branch-probability" on x86_64-linux-gnu Date: Tue, 14 May 2024 19:05:45 +0000 [thread overview] Message-ID: <bug-115092-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115092 Bug ID: 115092 Summary: wrong code at -O1 with "-fgcse -ftree-pre -fno-tree-dominator-opts -fno-tree-fre -fno-guess-branch-probability" 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: --- It appears to be a recent regression as it only reproduces with 14.1 and trunk, but not 13.* and earlier. It needs several flags, but hope it's still of interest. Compiler Explorer: https://godbolt.org/z/qTc3e6s7f [521] % 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/15.0.0/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 --enable-multilib Thread model: posix Supported LTO compression algorithms: zlib gcc version 15.0.0 20240514 (experimental) (GCC) [522] % [522] % gcctk -O1 small.c; ./a.out [523] % [523] % gcctk -O1 -fgcse -ftree-pre -fno-tree-dominator-opts -fno-tree-fre -fno-guess-branch-probability small.c [524] % ./a.out Floating point exception [525] % [525] % cat small.c int a, b, c = 1, d, e; int main() { int f, g = a; b = -2; f = -(1 >> ((c && b) & ~a)); if (f <= b) d = g / e; return 0; }
next reply other threads:[~2024-05-14 19:05 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-05-14 19:05 zhendong.su at inf dot ethz.ch [this message] 2024-05-14 19:13 ` [Bug tree-optimization/115092] [14/15 Regression] wrong code at -O1 with "-fgcse -ftree-pre -fno-tree-dominator-opts -fno-tree-fre -fno-guess-branch-probability" on x86_64-linux-gnu since r14-4810 jakub at gcc dot gnu.org 2024-05-14 19:32 ` [Bug rtl-optimization/115092] " pinskia at gcc dot gnu.org 2024-05-14 22:04 ` pinskia at gcc dot gnu.org 2024-05-15 10:02 ` jakub at gcc dot gnu.org 2024-05-15 11:16 ` jakub at gcc dot gnu.org 2024-05-15 11:22 ` segher at gcc dot gnu.org 2024-05-15 11:32 ` segher at gcc dot gnu.org 2024-05-15 11:44 ` jakub at gcc dot gnu.org 2024-05-15 11:49 ` segher at gcc dot gnu.org 2024-05-15 12:09 ` jakub at gcc dot gnu.org 2024-05-15 13:36 ` segher at gcc dot gnu.org 2024-05-15 16:44 ` cvs-commit at gcc dot gnu.org 2024-06-04 14:26 ` cvs-commit at gcc dot gnu.org 2024-06-04 14:28 ` jakub at gcc dot gnu.org 2024-06-11 6:17 ` cvs-commit at gcc dot gnu.org 2024-06-11 10:38 ` cvs-commit at gcc dot gnu.org 2024-06-20 13:23 ` cvs-commit 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-115092-4@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).