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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/105665] New: wrong code at -Os and above on x86_64-linux-gnu Date: Thu, 19 May 2022 20:19:46 +0000 [thread overview] Message-ID: <bug-105665-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105665 Bug ID: 105665 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: --- This appears to be a regression from 11.3. [599] % 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/13.0.0/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 13.0.0 20220519 (experimental) [master r13-673-gd863ba23fb1] (GCC) [600] % [600] % gcctk -O1 small.c; ./a.out [601] % [601] % gcctk -Os small.c [602] % ./a.out Segmentation fault [603] % [603] % cat small.c int a, b, c[1], d[2], *e = c; int main() { int f = 0; for (; b < 2; b++) { int g; if (f) b = 40; a = d[b * b]; for (f = 0; f < 3; f++) { if (e) break; g--; if (a) a = g; } } return 0; }
next reply other threads:[~2022-05-19 20:19 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-19 20:19 zhendong.su at inf dot ethz.ch [this message] 2022-05-19 20:20 ` [Bug tree-optimization/105665] " zhendong.su at inf dot ethz.ch 2022-05-19 20:26 ` [Bug tree-optimization/105665] [12/13 Regression] wrong code at -Os and above on x86_64-linux-gnu since r12-397-gda9e6e63d1ae22 marxin at gcc dot gnu.org 2022-05-19 21:04 ` jakub at gcc dot gnu.org 2022-05-20 6:42 ` rguenth at gcc dot gnu.org 2022-05-22 2:32 ` pinskia at gcc dot gnu.org 2022-05-28 0:17 ` aoliva at gcc dot gnu.org 2022-06-03 7:05 ` cvs-commit at gcc dot gnu.org 2022-07-27 9:24 ` [Bug tree-optimization/105665] [12 " cvs-commit at gcc dot gnu.org 2022-07-27 9:24 ` rguenth at gcc dot gnu.org
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