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From: "zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114551] New: wrong code at -O3 on x86_64-linux-gnu Date: Mon, 01 Apr 2024 19:31:35 +0000 [thread overview] Message-ID: <bug-114551-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114551 Bug ID: 114551 Summary: wrong code at -O3 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 does not reproduce for 13.2 and earlier. Compiler Explorer: https://godbolt.org/z/q3hrz8MW1 [587] % 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/14.0.1/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 14.0.1 20240401 (experimental) (GCC) [588] % [588] % gcctk -O2 small.c; ./a.out [589] % [589] % gcctk -O3 small.c [590] % ./a.out Segmentation fault [591] % [591] % cat small.c int a, b[4], c, d, e, f; int main() { a--; for (f = 3; f >= 0; f--) { for (e = 0; e < 4; e++) c = 0; for (; c < 4; c++) { d = f && a > 0 && f > (2147483647 - a) ? 0 : b[f]; continue; } } return 0; }
next reply other threads:[~2024-04-01 19:31 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-01 19:31 zhendong.su at inf dot ethz.ch [this message] 2024-04-01 20:45 ` [Bug tree-optimization/114551] [14 Regression] " pinskia at gcc dot gnu.org 2024-04-02 11:33 ` rguenth at gcc dot gnu.org 2024-04-02 13:22 ` jakub at gcc dot gnu.org 2024-04-02 23:43 ` [Bug tree-optimization/114551] [14 Regression] wrong code at -O3 on x86_64-linux-gnu since r14-2944 pinskia at gcc dot gnu.org 2024-04-03 3:44 ` pinskia at gcc dot gnu.org 2024-04-03 3:46 ` pinskia at gcc dot gnu.org 2024-04-03 12:27 ` rguenth at gcc dot gnu.org 2024-04-04 7:00 ` cvs-commit at gcc dot gnu.org 2024-04-04 7:01 ` [Bug tree-optimization/114551] [13 " rguenth at gcc dot gnu.org 2024-05-06 12:06 ` [Bug tree-optimization/114551] [14 " rguenth at gcc dot gnu.org
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