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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/110176] New: wrong code at -Os and above on x86_64-linux-gnu Date: Thu, 08 Jun 2023 14:44:19 +0000 [thread overview] Message-ID: <bug-110176-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110176 Bug ID: 110176 Summary: wrong code at -Os 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: --- It seems to affect GCC 10.4 and later. Compiler Explorer: https://godbolt.org/z/aKfvfxa63 [504] % 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 20230607 (experimental) (GCC) [505] % [505] % gcctk -O1 small.c; ./a.out [506] % [506] % gcctk -O2 small.c [507] % timeout -s 9 5 ./a.out Killed [508] % [508] % cat small.c int a, b; void c() {} int d() { unsigned f[1]; int i; if (a) goto h; f[0] = -1; while (1) { c(); for (; a < 1; a++) { if (0) { j: continue; } i = f[0]; if (a) break; b = i >= (b == 0); } if (!b) { if (0) { h: goto j; } return 0; } } } int main() { d(); return 0; }
next reply other threads:[~2023-06-08 14:44 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-08 14:44 zhendong.su at inf dot ethz.ch [this message] 2023-06-08 21:43 ` [Bug tree-optimization/110176] " pinskia at gcc dot gnu.org 2023-06-08 21:50 ` pinskia at gcc dot gnu.org 2023-06-08 21:52 ` [Bug tree-optimization/110176] [10/11/12/13/14 Regression] " pinskia at gcc dot gnu.org 2023-06-08 22:10 ` pinskia at gcc dot gnu.org 2023-06-09 7:11 ` rguenth at gcc dot gnu.org 2023-07-07 10:45 ` [Bug tree-optimization/110176] [11/12/13/14 " rguenth at gcc dot gnu.org 2024-01-04 12:31 ` [Bug tree-optimization/110176] [11/12/13/14 Regression] wrong code at -Os and above on x86_64-linux-gnu since r11-2446 jakub at gcc dot gnu.org 2024-01-04 17:17 ` pinskia at gcc dot gnu.org 2024-01-08 9:37 ` rguenth at gcc dot gnu.org 2024-01-31 13:44 ` rguenth at gcc dot gnu.org 2024-01-31 14:47 ` cvs-commit at gcc dot gnu.org 2024-01-31 14:49 ` [Bug tree-optimization/110176] [11/12/13 " rguenth at gcc dot gnu.org 2024-02-06 13:20 ` cvs-commit at gcc dot gnu.org 2024-05-17 11:12 ` [Bug tree-optimization/110176] [11/12 " cvs-commit at gcc dot gnu.org
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