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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/100934] New: wrong code at -O3 on x86_64-linux-gnu Date: Sun, 06 Jun 2021 20:49:44 +0000 [thread overview] Message-ID: <bug-100934-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100934 Bug ID: 100934 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 seems to affect all versions since GCC 8.4 (but not GCC 8.3). [583] % 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 20210606 (experimental) [master revision 28c62475050:a6bc26893ec:a589877a0036fc2f66b7a957859940c53efdc7c9] (GCC) [584] % [584] % gcctk -O2 small.c; ./a.out [585] % [585] % gcctk -O3 small.c [586] % ./a.out Segmentation fault [587] % [587] % cat small.c int a, b, c, d, e; int main() { int f = 0, g = 0; for (; f < 2; f++) { int h, i; for (h = 0; h < 2; h++) { b = e = g ? a % g : 0; c = d; for (i = 0; i < 1; i++) g = 0; for (; g < 2; g++) ; } } return 0; }
next reply other threads:[~2021-06-06 20:49 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-06 20:49 zhendong.su at inf dot ethz.ch [this message] 2021-06-06 21:07 ` [Bug tree-optimization/100934] [9/10/11/12 Regression] wrong code at -O3 during unrolling pinskia at gcc dot gnu.org 2021-06-07 8:38 ` [Bug tree-optimization/100934] [9/10/11/12 Regression] wrong code at -O3 during unrolling since r9-6299 jakub at gcc dot gnu.org 2021-06-07 8:42 ` jakub at gcc dot gnu.org 2021-06-07 10:28 ` rguenth at gcc dot gnu.org 2021-06-07 13:13 ` rguenth at gcc dot gnu.org 2021-06-11 9:28 ` rguenth at gcc dot gnu.org 2021-06-14 2:48 ` law at gcc dot gnu.org 2021-06-14 12:56 ` rguenth at gcc dot gnu.org 2021-06-14 12:59 ` jakub at gcc dot gnu.org 2021-06-14 13:02 ` rguenther at suse dot de 2021-06-14 14:37 ` cvs-commit at gcc dot gnu.org 2021-06-14 14:39 ` [Bug tree-optimization/100934] [9/10/11 " rguenth at gcc dot gnu.org 2021-06-16 13:12 ` cvs-commit at gcc dot gnu.org 2021-06-16 14:24 ` [Bug tree-optimization/100934] [9/10 " cvs-commit at gcc dot gnu.org 2021-10-13 10:09 ` [Bug tree-optimization/100934] [9 " cvs-commit at gcc dot gnu.org 2021-10-13 10:10 ` rguenth at gcc dot gnu.org 2021-11-09 7:57 ` pinskia at gcc dot gnu.org
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