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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/104543] New: wrong code at -O3 on x86_64-linux-gnu Date: Tue, 15 Feb 2022 06:56:46 +0000 [thread overview] Message-ID: <bug-104543-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104543 Bug ID: 104543 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: --- This appears to be a recent regression. [588] % 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/12.0.1/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 12.0.1 20220215 (experimental) [master r12-7236-g2c3309e3d0f] (GCC) [589] % [589] % gcctk -O2 small.c; ./a.out [590] % [590] % gcctk -O3 small.c [591] % ./a.out Aborted [592] % [592] % cat small.c int a[3], b, c; int e() { if (!c) { for (b = 0; b < 3; b++) for (c = 0; c < 3; c++) a[c] ^= 1; return -1; } return 0; } int main() { e(); if (a[1] != 1) __builtin_abort(); return 0; }
next reply other threads:[~2022-02-15 6:56 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-15 6:56 zhendong.su at inf dot ethz.ch [this message] 2022-02-15 6:57 ` [Bug tree-optimization/104543] " zhendong.su at inf dot ethz.ch 2022-02-15 7:06 ` [Bug tree-optimization/104543] [12 Regression] " pinskia at gcc dot gnu.org 2022-02-15 7:14 ` pinskia at gcc dot gnu.org 2022-02-15 8:28 ` rguenth at gcc dot gnu.org 2022-02-15 10:02 ` rguenth at gcc dot gnu.org 2022-02-15 11:26 ` rguenth at gcc dot gnu.org 2022-02-15 12:22 ` cvs-commit at gcc dot gnu.org 2022-02-15 12:22 ` rguenth at gcc dot gnu.org 2022-02-15 12:23 ` [Bug tree-optimization/104543] [9/10/11 " rguenth at gcc dot gnu.org 2022-02-15 12:53 ` rguenth at gcc dot gnu.org 2022-02-15 12:54 ` rguenth at gcc dot gnu.org 2022-02-15 14:47 ` matz at gcc dot gnu.org 2022-05-27 9:47 ` [Bug tree-optimization/104543] [10/11 " rguenth at gcc dot gnu.org 2022-06-28 10:48 ` jakub at gcc dot gnu.org 2022-07-15 10:51 ` marxin at gcc dot gnu.org 2023-07-07 10:42 ` [Bug tree-optimization/104543] [11 " rguenth at gcc dot gnu.org
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